feat: support database connectors and HTTP server configuration

Define reusable response bodies in .api with typed code mappings, per-route overrides and matching OpenAPI schemas. Add application and callback encoders, early response policy selection, and isolated remote-consumer release verification.

Release v0.8.0-preview after full race, vet, build and local MySQL workflow acceptance.

ADVANCED.md

@@ -11,15 +11,17 @@
 | `openapi` | 路由与 OpenAPI 3.0.3 同时注册、DTO schema、响应信封 | 显式声明请求/响应；不自动推断任意 Handler 行为，不附带 Swagger UI |
 | `auth` | RS256/EdDSA JWT 验证与公钥轮换、可撤销 Session、Policy 接口 | 登录验证和业务授权规则由接入方提供；不自动获取 token 指定的密钥 |
 | `telemetry` | HTTP 入站/出站、Redis、SQL spans，HTTP 指标和 traceId 日志关联 | 注入 OTel exporter/reader 后才外发；SQL Query span 不覆盖后续遍历；不接管全局 provider |
-| `config` / `logx` | JSON/YAML 文件、环境变量覆盖、动态日志级别 | 热更新只开放日志级别；连接池、监听、认证等静态变更要求重启 |
+| `config` / `logx` | JSON/YAML 文件、环境变量覆盖、动态日志级别、轮转/脱敏/堆栈/慢请求 | 热更新只开放日志级别；连接池、监听、认证等静态变更要求重启 |
 | `resilience` | 失败阈值、熔断冷却、单探针恢复、上游并发隔离 | 一个实例对应一个依赖；默认内存状态，不做跨进程全局熔断 |
 | `middleware/redis` | 跨副本限流、幂等 claim/回放、容量限制 | 专用 Redis namespace；TTL 窗口内保护不等于永久业务去重 |
 | `queue` / `queue/redis` | 持久消息接口、Streams 接管、有限重试、失败消息管理 | 至少一次交付，处理器必须幂等；持久性取决于 Redis 部署 |
-| `storage` | Local、S3 兼容（含 R2 配置）、OSS 官方 SDK 适配、临时下载链接 | 云平台专属功能单独扩展；本批没有云账号实网验收 |
+| `storage` | Local、S3/R2、OSS、临时下载、受限直传、云端分片 | 云平台专属功能单独扩展；本批没有云账号实网验收 |
 | `database/migrate` | MySQL 显式部署迁移、摘要预览、失败 dirty 阻断 | 不随应用启动自动改表；无自动 down/force；已应用文件摘要需部署方留存校对 |
 | `audit` | 可注入 Sink、字段白名单、JSON 行串行输出、错误返回 | 不是防篡改存储；与业务同事务的审计要实现事务型 Sink |
 | `pagination` | page/pageSize、最大偏移与页长、统一结果 | offset 分页，不承诺跨页快照，不实现游标分页 |
 
+日志的配置、脱敏边界、轮转和慢请求记录见 [logx 使用说明](logx/README.md)。框架保留通用 Context/结构化字段扩展，不新增固定业务身份上下文。
+
 ## 对象存储
 
 业务只持有 `storage.Store`，调用 `Put`、`Get`、`Delete`。构造函数属于启动组合处：
@@ -51,9 +53,9 @@ files, err := oss.New(client, bucket, 32<<20)
 
 上方是互斥初始化片段，实际代码需逐次处理错误。import 路径分别为 `go-omni/storage/local`、`go-omni/storage/s3`、`go-omni/storage/oss`（完整 module 前缀 `git.yuntuo.hk/k2safe/`）；`ossSdk` 与 `ossCredentials` 来自 `github.com/aliyun/alibabacloud-oss-go-sdk-v2/oss` 及其 `credentials` 子包。S3 凭据来自 `github.com/minio/minio-go/v7/pkg/credentials`。
 
-统一约定：key 是对象标识，不是磁盘路径；拒绝绝对路径、`..`、空路径段和反斜杠。Put 必须传已知长度，调用方保证与内容一致。默认单对象 32 MiB，流式读写；OSS 本适配器只做 simple upload，最大配置 5 GiB。Get 返回的 `Body` 由调用方关闭，读取过程也应有 context 截止。Delete 缺失对象成功；Get 缺失对象返回 `storage.ErrNotFound`。底层客户端/传输连接池由应用管理，不会在单次操作后关闭。
+统一约定：key 是对象标识，不是磁盘路径；拒绝绝对路径、`..`、空路径段和反斜杠。Put 必须传已知长度，并检查实际读取长度。默认单对象 32 MiB，流式读写；OSS 简单 Put 上限 5 GiB，更大使用独立分片能力。Get 返回的 `Body` 由调用方关闭，读取过程也应有 context 截止。Delete 缺失对象成功；Get 缺失对象返回 `storage.ErrNotFound`。底层客户端/传输连接池由应用管理，不会在单次操作后关闭。
 
-业务需要临时链接时显式依赖额外接口 `storage.Presigner`。S3/OSS 实现 `PresignGet`；Local 用 `storage.NewSigner(files, downloadBaseURL, secret)` 提供 HTTP 下载 Handler。链接 TTL 为 1 秒到 1 小时，私钥/临时凭据可能让云链接提前失效。签发链接前必须完成业务授权；对象 key 及 bucket 本身不是租户权限。签名链接不要写日志。首版未封装前端直传、分片续传、生命周期、ACL、CDN 自定义域名和版本管理。
+业务需要临时链接时显式依赖额外接口 `storage.Presigner`。S3/OSS 实现 `PresignGet`；Local 用 `storage.NewSigner(files, downloadBaseURL, secret)` 提供 HTTP 下载 Handler。链接 TTL 为 1 秒到 1 小时，私钥/临时凭据可能让云链接提前失效。签发链接前必须完成业务授权；对象 key 及 bucket 本身不是租户权限。签名链接不要写日志。受限直传和云端分片现已提供可选接口，见 [上传与续传说明](storage/README.md)。生命周期、ACL、CDN 自定义域名和版本管理仍由平台/部署管理。
 
 R2 实现 S3 的子集，配置入口使用标准账户 endpoint；法域专属 endpoint 可显式配置。兼容性依据：[R2 S3 API](https://developers.cloudflare.com/r2/api/s3/api/)、[R2 签名链接](https://developers.cloudflare.com/r2/api/s3/presigned-urls/)。OSS 使用其[官方 Go SDK v2](https://www.alibabacloud.com/help/en/oss/developer-reference/manual-for-go-sdk-v2/)，没有假定全部 S3 行为与 OSS 等价。
 

API.md

@@ -0,0 +1,287 @@
+# API 契约与项目生成
+
+首次接入请先看 [README](README.md)：包含固定远程版本安装、可运行项目、完整 `.api` 示例和已有服务接入步骤。本页用于查阅语法与生成规则；下方带 `--framework-dir` 的命令用于框架源码开发。
+
+本阶段目标：从 `.api` 定义生成可运行的 Go 项目；定义、绑定、校验与 OpenAPI 保持一致；重复生成不覆盖业务实现；业务代码继续独立于网络层。实现入口是 `cmd/go-omni/apigen`，运行时契约编译器是 `contract`。
+
+## 与 go-zero 的对应关系
+
+调研参考了 go-zero 官方的 [API DSL](https://go-zero.dev/reference/api-dsl/)、[参数规则](https://go-zero.dev/reference/api-dsl/parameter/)、[goctl API](https://go-zero.dev/reference/cli-guide/api/) 和 [项目结构](https://go-zero.dev/concepts/project-structure/)。借鉴其声明接口后生成项目的工作方式：统一的类型定义、路由声明、分组、前缀和命名中间件。实现独立编写，不引入 go-zero 或 Gin 运行时依赖。
+
+| 使用体验 | go-omni 实现 |
+| --- | --- |
+| 新建接口项目 | `go-omni api new <directory>` |
+| 按契约生成、更新 | `go-omni api generate --api user.api --dir .` |
+| 熟悉的命令别名 | `api go -api user.api -dir .` |
+| 校验契约 | `api validate --api user.api` |
+| CI 检查生成产物是否过期 | `api generate --api user.api --dir . --check` |
+| 业务逻辑目录 | `internal/service/<group>`，沿用 Omni 的 Service 分层 |
+| 依赖装配 | `internal/servicecontext` |
+| 接口文档 | 自动生成 `docs/openapi.json`，同时提供 `/openapi.json` |
+
+这是明确限定的 go-zero 风格方言，**不是完整 goctl 兼容实现**。不支持的声明和校验标签会在生成前报错。
+
+## 立即试用
+
+源码开发时，从 go-omni 仓库运行，显式引用本地框架：
+
+```sh
+go run ./cmd/go-omni api new \
+  --module example.com/omniDemo --framework-dir . ../omniDemo
+
+cd ../omniDemo
+go mod tidy
+go run ./cmd/server
+```
+
+访问 `http://127.0.0.1:8080/api/greet/Alice` 可得到带 `data.message` 的统一响应。`api new` 的问候示例包含可运行逻辑；自定义契约新生成的 Service 会明确返回 501，等待业务实现。
+
+用现成的多分组定义生成项目，在 go-omni 仓库执行：
+
+```sh
+go run ./cmd/go-omni new --api examples/contracts/user.api \
+  --module example.com/userService --framework-dir . \
+  --log-output file --log-format json ../userService
+```
+
+`api generate` 在新目录中也会生成完整项目。默认只监听 localhost；`GO_OMNI_HTTP_ADDR` 修改地址，`GO_OMNI_TRANSPORT=native` 切换网络层。配置顺序为默认值 → `etc/config.yaml` → 环境变量。文件日志支持现有轮转配置。远程试用使用与 CLI 一致的固定版本，见 [发布说明](RELEASE.md)。
+
+API 项目现在支持组合数据库、存储和日志：
+
+```sh
+go-omni new --api user.api --module example.com/userService \
+  --database mysql --storage local --log-output file ./userService
+```
+
+- `--database none|memory|mysql`：API 默认 `none`，`memory` 是不创建数据库连接的别名；MySQL 生成连接池、配置、事务入口和 readiness 探针。
+- `--storage none|local|s3|r2|oss`：默认 none，生成统一 Files / Uploads / Downloads / UploadLinks 依赖；本地签名对象端点为 `/storage/object`。
+- `--log-output stdout|stderr|file` 与 `--log-format json|text`：配置和无配置文件启动使用一致默认值。
+
+初次选项记录在 `.goOmni/apiManifest.json`，以后直接 `api generate` 会继承。已有项目通过参数切换选项会报错，因为初始化代码属于业务方；可在新目录生成对照后手动迁移。`--force` 不允许覆盖 API 项目。旧式 CRUD 脚手架仍保留。
+
+MySQL 密钥只从 `GO_OMNI_DB_DSN` 获取，非秘密池配置位于 YAML，环境变量优先。存储使用原有 `GO_OMNI_STORAGE_*`；API 项目不会额外生成公开的签名发放接口，鉴权和对象权限由业务实现。初始化失败会清理已打开资源，退出清理可重复调用。
+
+HTTP 请求类型不能推导数据库表结构；迁移和 Repository 由业务自己维护。完整案例见 [用户管理示例](examples/userService/README.md)，覆盖真实 MySQL、事务审计、鉴权、文件导出和日志。
+
+## 接口定义
+
+```go
+syntax = "v1"
+
+type UpdateUserReq {
+    UserID int64 `path:"userId,range=[1:1000000]"`
+    Notify bool `form:"notify,default=false"`
+    Name string `json:"name" binding:"required,max=50"`
+    Age *int `json:"age,optional,range=[0:150]"`
+}
+
+type UserResp {
+    UserID int64 `json:"userId"`
+    Name string `json:"name"`
+}
+
+@server (
+    group: user
+    prefix: /api/v1
+)
+service user-api {
+    @doc "Update a user"
+    @handler updateUser
+    put /users/:userId (UpdateUserReq) returns (UserResp)
+}
+```
+
+类型和 Go 字段使用导出命名；JSON、query、path 名称使用 lowerCamelCase；Header 使用 HTTP 标准名称。响应类型定义业务返回值。未配置时使用默认公共体；当前源码支持在 `.api` 中声明公共响应模板，选择字段和结构，并按分组复用或由单接口覆盖，详见 [公共响应体](RESPONSE.md)。
+
+支持：
+
+- 可省略的 `syntax = "v1"`；`info` 中的 title、version 和描述性元数据。
+- 单独的 `type X { ... }` 与 `type (...)`；基础标量、指针、嵌套命名类型、切片、字符串键 map。嵌套对象只使用 JSON 字段。
+- 相对 `.api` 导入及 `import (...)`，重复导入去重；拒绝循环和越过入口目录的导入。单文件 1 MiB、总计 8 MiB、最多 64 个文件，限制导入/类型深度及 schema 展开规模。
+- 同一 service 名称的多个块；`@server` 的 group、prefix、middleware、auth、errors、response，group 可以写 `admin/user`。
+- 每个路由必须有 `@handler`；可选单行/多行 `@doc`、`@auth`、`@errors`、`@response`；GET/POST/PUT/PATCH/DELETE/HEAD/OPTIONS。
+- 可省略请求或响应；有响应默认 200，无响应默认 204。Omni 扩展 `@status 201`、`@status 202`；204 不允许响应类型，HEAD 不允许响应体，GET/HEAD 不允许 JSON 请求体。
+- 每个请求字段只使用一个来源：`json`、`path`、`form`、`header`。本版 `form` 明确表示 URL query，不解析 multipart 或表单 body。query 切片用重复键；header/path 使用标量。
+- 来源标签中的 `optional` / `omitempty`、标量 `default`、标量 `options=a|b`、数值 `range=[1:100]`（支持开区间和单边界）。
+- `binding` 的 `required`、`min`、`max`、`len`、`email`。长度按 Unicode 字符或切片元素数；范围边界必须有限且位于 ±2^53 内。
+
+暂不支持匿名嵌入、别名、递归类型、未声明的外部 Go 类型、自定义 JSON 编解码、`[]byte`、泛型、`json:",string"`、任意 validator 标签、go-zero 的 JWT/签名/SSE 声明，以及客户端 SDK 生成。认证验证通过声明关联的命名中间件实现。未列出的语法会明确报错。
+
+业务错误、具名鉴权、多行文档及下述开发命令从 CLI `v0.7.0-preview.1` 提供。公共响应模板从 `v0.8.0-preview` 提供，CLI 与业务项目中的框架依赖需一起升级。
+
+## 业务错误：声明、代码和文档共用一份定义
+
+```go
+error (
+    Unauthenticated 401 "UNAUTHENTICATED" "authentication required"
+    Forbidden 403 "FORBIDDEN" "permission denied"
+    UserNotFound 404 "USER_NOT_FOUND" "user not found"
+    EmailTaken 409 "EMAIL_TAKEN" "email already in use"
+)
+```
+
+也可写单条 `error EmailTaken 409 "EMAIL_TAKEN" "email already in use"`，或把错误目录放进相对导入的 `errors.api`。
+名称用 UpperCamelCase，HTTP 状态范围 400–599，错误码用大写字母/数字/下划线且全局唯一，message 是可公开返回的稳定提示。
+
+`@server (errors: Unauthenticated)` 声明组级错误；路由 `@errors UserNotFound, EmailTaken` 追加到组级列表并去重。
+`@errors none` 清空继承的业务错误。未声明、重复声明或生成符号冲突会报告源码位置。
+
+生成 `internal/apierrors/errorsGen.go`：
+
+```go
+return nil, apierrors.EmailTaken()
+// 可用 apierrors.CodeEmailTaken 引用同一个错误码。
+```
+
+每次调用返回新错误，避免并发修改共享错误对象。生成器不会自动把任意数据库错误转成业务错误；由 Service/适配层调用这些函数。
+内部 Cause 可能进入访问日志，敏感驱动报错应像 userService 示例一样先归类再转换。
+
+OpenAPI 对每个状态按选定的响应模板生成结构和命名 examples，同一 409 下多个错误不会相互覆盖；平铺模式的纯业务状态还列出 code enum。
+默认框架错误状态与自动添加的鉴权 401 保留开放的 code 字段，容纳校验器/中间件实际错误。
+`x-omni-errors` 提供错误目录与路由关联。文档声明不拦截、改写或穷举运行时的所有错误。
+
+## 鉴权：声明与路由注册一起变化
+
+```go
+auth UserAuth (
+    type: bearer
+    middleware: Auth
+    description: "Application access token"
+)
+
+@server (
+    group: user
+    prefix: /api/v1
+    auth: UserAuth
+    errors: Unauthenticated
+)
+service user-api {
+    @errors Forbidden, EmailTaken
+    @handler createUser
+    @status 201
+    post /users (CreateUserReq) returns (UserResp)
+
+    @auth none
+    @errors none
+    @handler publicStatus
+    get /status
+}
+```
+
+`auth` 是具名契约，`middleware` 指向实际 hook；生成器把它放在普通 middleware 前面执行，并在注册任何路由前检查 hook 非空。
+新 hook 未实现时返回 501，已有手写 hook 保留。需要在 hook 中验证凭证、失效时间、签发者、权限等；声明不会自动实现登录或 JWT 校验。
+
+- `type: bearer`：对应 HTTP Bearer，可选 `bearerFormat: JWT`，这只是文档提示。
+- `type: apiKey`：必须同时声明 `in: header` 或 `in: cookie` 和 `name`，例如 `X-API-Key` 或 `sessionId`。
+- `auth: UserAuth` 可在组级使用；路由 `@auth OtherAuth` 替换，`@auth none` 撤销继承的声明鉴权。普通 middleware 继续保留。
+- 不要再把该 auth 的 hook 重复写进普通 middleware。不支持 query token、多个方案 AND/OR、OAuth2 scopes 或隐含认证策略。
+- 被保护路由自动描述 401；403 和具体错误码由 `@errors` 明确声明。未声明 auth 的旧项目仍按其原有 middleware 执行。
+
+文档生成 `components.securitySchemes` 与逐接口 `security`；显式公共接口使用空数组。
+结构遵循 [OpenAPI 3.0.3 Security Requirement](https://spec.openapis.org/oas/v3.0.3.html#security-requirement-object)。
+
+## 文档和日常开发命令
+
+保留单行 `@doc "摘要"`，也可以：
+
+```go
+@doc (
+    summary: "Create a user"
+    description: "Writes user data and audit in the same transaction"
+    tags: users, administration
+    deprecated: false
+)
+```
+
+未设置 tags 时使用 group 分组。`info` 的 description/desc 也会进入 OpenAPI；两者不能同时声明。
+
+在生成项目目录内，不必重复输入 API 路径：
+
+```sh
+go-omni api validate              # 发现 manifest 中的入口并校验
+go-omni api inspect               # 方法、路径、Handler、鉴权与业务错误总览
+go-omni api generate --dry-run    # 预览新增/更新/移除，完全不写文件
+go-omni api generate              # 实际生成，保留手写业务
+go-omni api generate --check      # 只读检查，可用于 CI
+go-omni api export > openapi.json # 独立导出纯 JSON，无需启动服务
+go test ./...
+```
+
+`--dry-run` 和 `--check` 不能组合。新项目预览也不创建目录；预览不是审批或锁定，实际生成会重新检查文件状态。
+在项目外可显式传 `--api`；生成时传 `--dir` 可定位其他项目。不会猜测多个 .api 中哪个是入口。
+路由总览的 `(undeclared)` 仅表示没有声明 auth；旧式中间件仍可能做认证。
+外发文档可用 export；项目内受生成器管理的 `docs/openapi.json` 请通过 generate 更新，以同步文件哈希。
+
+## 迁移扩展（v0.9.0-preview）
+
+- 动态 JSON 字段 `any` / `interface{}`，包含切片和 map；外围契约仍严格。
+- `scalar Name (...)` 显式引用项目类型，声明 JSON 输入/输出类型及文本绑定；支持已有 JSON/Text 转换方法。
+- `@body (mode: json/raw/multipart; maxBytes: ...)`：按路由限制请求体。
+- `@binding custom` 生成保留的绑定 hook；`@handlerMode manual` 生成保留的整个 Handler，raw/multipart 使用这个入口。
+- manual 可用 `@produces "text/plain"` 等声明无 DTO 成功输出。默认状态 200，初始手写 stub 返回 501。
+
+完整语法、边界和示例见 [迁移扩展指南](MIGRATION.md)。新增生成代码要求 CLI 与框架依赖一起升级到 `v0.9.0-preview`；不兼容全部 goctl 语法。
+
+## 参数语义
+
+无 optional/default 的字段按“是否出现”判断必填，`false`、`0`、`""` 是已提供的值。额外声明 `binding:"required"` 才会拒绝标量零值。默认值只在字段缺失时使用，不替换显式的空值。
+
+业务需要区分“没传”和“传了零值”时使用 `*T` 加 optional。指针允许 JSON null；普通非指针字段拒绝 null（动态 `any` 允许）；`binding:"required"` 拒绝指针 null。缺失与 null 都会得到 nil，本版没有三态 Nullable 类型。响应端的 `optional` 不等于 Go 编码器的 `omitempty`；需要省略零值时显式使用 `omitempty`。
+
+JSON 必须是一个 object，Content-Type 为 application/json。默认最多 1 MiB，包含 chunked/未知长度和尾部空白；超限返回 413。重复 JSON key、未知字段、多个 JSON 值、标量 query/header 重复值、格式和约束错误返回 400；错误 Content-Type 返回 415。失败不会部分修改目标 DTO；错误详情只保留在内部 cause，公共响应不回显原始参数。
+
+`contract.Binder` 在服务启动时编译，随后并发复用，不会每次请求重新分析标签。CLI 用相同编译器产生文档，因此来源、必填、默认、nullable、枚举、范围和长度具有同一来源。响应类型和约束由业务实现遵守，不在每次响应上再次校验；非 nullable 集合请返回空集合而不是 nil。
+
+## 生成目录和业务边界
+
+```text
+api/                              # 开发者维护的契约及导入
+cmd/server/main.go                # 启动、日志、优雅退出
+etc/config.yaml
+internal/settings/
+internal/servicecontext/          # 依赖初始化和释放
+internal/types/typesGen.go
+internal/apierrors/errorsGen.go    # 声明错误后生成
+internal/handler/routesGen.go
+internal/handler/openapiGen.go
+internal/handler/<group>/handlersGen.go
+internal/service/<group>/service.go
+internal/service/<group>/<operation>.go
+internal/repository/<group>/repository.go
+internal/middleware/registryGen.go
+internal/middleware/<name>.go
+docs/openapi.json
+.goOmni/apiManifest.json
+```
+
+Service 方法接收标准 `context.Context` 与生成的请求 DTO；Handler 调用 Service 并完成响应包装。网络适配器仍经 Omni/httpx 接入。Repository 是业务所有的扩展位置，不自动生成虚构 CRUD 查询。
+
+命名中间件按声明顺序组合，第一个在最外层。新 hook 初始返回 501，必须实现后才放行；registry 自动维护，hook 文件只创建一次。缺失 hook 在注册任何路由前报错。文档通过 `x-omni-middleware` 标出命名 hook，不把名称误当成已实现的认证协议。
+
+## 安全更新与 CI
+
+在生成项目中安装/使用与框架版本相符的 go-omni CLI：
+
+```sh
+go-omni api validate --api api/user.api
+go-omni api generate --api api/user.api --dir .
+go-omni api generate --api api/user.api --dir . --check
+go test ./...
+```
+
+`Gen.go` 和 OpenAPI 由生成器管理，manifest 保存其 SHA-256。手动修改后更新会报冲突。Service、Repository、main、配置、依赖装配和中间件实现按字节保留；只补缺失文件。删除接口/分组时只移除旧的生成文件，保留业务代码；已删除类型仍被旧业务引用时，需要明确迁移该业务文件，编译器会提示。
+
+`--check` 只读，检查产物是否过期，以及所需骨架是否缺失。契约复制到项目后，请编辑项目内的 API；外部定义与已存在副本不一致时会拒绝覆盖。一个项目由一个 API 入口管理，可以通过导入拆分文件。
+
+生成器拒绝输出路径穿越、受管理路径上的符号链接、大小写路径冲突和无所有权的覆盖。生成前统一校验/格式化，锁文件防止两个生成器同时修改；文件以原子替换写入，普通写入失败会回滚。本版不是整个目录的崩溃原子事务：进程被强杀或机器断电后，应按 Git 恢复生成产物和 manifest，再重试。请将 manifest 与生成产物一并提交，也不要在生成过程中编辑这些文件。
+
+生成器不自动安装依赖、不访问数据库、不推送仓库、不替业务实现权限规则。
+
+## 验证
+
+```sh
+go test -race -p=2 ./contract ./openapi ./cmd/go-omni/...
+python3 scripts/verifyAPI.py
+```
+
+Go 测试覆盖契约拒绝规则、多源绑定、零值/缺失、默认/范围/嵌套集合、文档约束、幂等更新、只读检查、业务保留、删除路由、路径边界及生成项目编译。Python 验收会在临时目录生成项目，分别启动 nethttp/native，验证真实 HTTP 请求、中间件、日志 requestId 和优雅退出；结束后清理自己创建的进程和临时文件。结果记录在 `performance/apiGenerationLocal.json`。

CHANGELOG.md

@@ -1,6 +1,51 @@
 # Changelog
 
-## Unreleased
+## v0.9.1-preview
+
+- 新增标准 `database.OpenConnector` 和独立 `PoolConfig`；与 DSN 入口共享池参数、限时启动 Ping、失败清理、Health、事务，不注册全局驱动配置。
+- 新增 `omni.WithHTTPConfig` / `Config.HTTP`：读头、读请求、写响应、空闲超时和头大小，贯通代码、JSON/YAML、环境变量、Run/Serve 与 NewServer；nethttp 支持 Go-only ErrorLog。
+- 保持已有默认行为；负值和实验 http2 不支持的超时项在监听前报错；记录各网络层的具体语义。
+- 增加真实 MySQL TLS/驱动日志隔离、连接池归属/取消/事务、nethttp/native 慢连接与写背压验收，以及无本地 replace 的远程消费者脚本。
+- 兼容 v0.9.0-preview 生成代码；不修改业务项目的数据库策略或生成代码最低版本。
+
+
+## v0.9.0-preview
+
+- 标准 HTTP Handler/Middleware 桥接：跟踪 Raw 状态与提交，保留取消、流式能力和中间件跨请求状态；已提交响应不追加 JSON。
+- `.api` 支持动态 JSON `any` / `interface{}`，保持重复键、大小、外围未知字段校验和数字精度。
+- 路由级请求体限额、自定义绑定和 manual Handler；上传、原始 body、下载可保留手写实现，重生成受保护。
+- 自定义 scalar 显式对接项目 JSON/Text 方法；支持可空和集合，分别生成请求/响应 OpenAPI；不放宽其他字段。
+- 新增 [迁移扩展指南](MIGRATION.md)、可运行示例和真实生成项目回归。CLI 与框架依赖一起升级。
+
+## v0.8.0-preview
+
+- 公共响应 `codeType` 支持 `int32` / `int64` / `string`，校验默认码及映射范围，OpenAPI 标注整数位宽；JSON/YAML 和生成代码保留 int64 精度，旧 `integer` 兼容。
+- 公共 JSON 响应体改为可配置模板：支持嵌套结构、独立错误体、错误码类型/映射、提示与空值行为；旧 DTO 仅保留源代码兼容。
+- `.api` 支持 `response Name (...)`、分组引用和单路由覆盖；`@response raw` 输出原始业务 JSON。生成的模板、路由和 OpenAPI 使用同一份配置。
+- 提供应用级/接口级编码器，以及 Text / XML / Bytes 直接输出，允许三方回调独立控制成功和失败的状态、Header、内容。
+- 接口响应策略可在全局中间件之前挂载，覆盖提前鉴权/限流失败和 Context 克隆；内置路由 404/405 使用应用配置。
+- 详见 [公共响应体](RESPONSE.md)。CLI 与项目框架依赖需要一起升级到本版。
+
+## v0.7.0-preview.1
+
+- `.api` 支持集中业务错误目录、组级与路由级错误声明，生成状态/错误码/提示一致的 `internal/apierrors` 函数，以及 OpenAPI 命名响应示例。
+- 具名鉴权声明支持 Bearer、header/cookie API key，关联真实中间件；支持组级继承、单路由覆盖与公共接口，认证 hook 优先执行并在启动时校验。
+- 新增多行 `@doc` 的摘要、描述、标签与弃用标记，`info.description` 同步文档。
+- 新增 `api inspect`、`api export`、`api generate --dry-run`；项目内自动识别 manifest 的 API 入口，减少重复参数。
+- 用户示例用真实 401/403/409 验证声明与行为，业务直接使用生成的错误函数；生成不会改写现有手写 hook 和 Service。
+- 纠正旧文档误将事务 Outbox、分布式锁列为已实现的描述；这两个模块当前没有实现。
+
+## v0.7.0-preview
+
+- 新增 `.api` 契约驱动生成器：DTO、严格多来源绑定与校验、路由、分组 Handler / Service / Repository、命名中间件及 OpenAPI；生成文件哈希管理、业务文件保护和只读 `--check`。
+- `new --api` / `api new` / `api generate` 可以组合 MySQL、日志以及 Local / S3 / R2 / OSS。保存初始基础设施选项，重生成自动沿用；显式切换已有项目选项会拒绝，避免静默丢失初始化代码。
+- 新增 `examples/userService` 独立业务示例与 `verifyAPIWorkflow.py`：用户 CRUD / 分页、管理员 Token 鉴权、MySQL 事务审计、故障回滚、文件导出、requestId 日志、数据库 readiness 和优雅退出；支持从远程版本验收。
+- 日志新增文件轮转、结构化敏感字段脱敏、异常堆栈及慢请求配置；存储新增统一上传策略、直传签名和云端分片能力。
+- 新增缓存、HTTP 客户端、限流 / 幂等 / 超时、后台任务、Redis 队列、审计、迁移与 telemetry 等可选模块；业务身份与 Orbit 保持由应用自行组合。
+- `database.ApplyEnv` 支持文件/默认配置叠加环境变量；数据库配置使用 lowerCamelCase，DSN 不参与 JSON/YAML 序列化。
+- 修复 native 在业务层提前拒绝请求体为 413 时等待继续读取 body 的问题，拒绝后关闭未读连接。
+
+以下是自上一版本以来的网络层变化与历史验收记录：
 
 - 新增 `TestNginxHTTP2Proxy` 与 `scripts/verifyHTTP2Proxy.py`：验证两段 TLS/h2、回源连接复用、证书校验拒绝、超时/客户端取消恢复，以及 GOAWAY 下的新旧实例切换和请求排空。Linux amd64、Nginx 1.30.5 普通与 race 模式各 3 轮通过；保留源码/镜像/日志校验信息和实际执行记录。
 - HTTP/2 代理验收的编译与测试阶段顺序运行，均限制 2 核、2 GiB、256 个进程/线程；集成测试禁用外部网络并使用只读根文件系统。总时限、SIGTERM、SIGHUP 清理实测通过；native 默认协议保持 HTTP/1.1。

MIGRATION.md

@@ -0,0 +1,182 @@
+# 已有 HTTP 项目逐步接入
+
+从 `v0.9.0-preview` 开始，以下能力贯通运行时、`.api`、代码生成和 OpenAPI。CLI 和项目框架依赖一起升级；入口见 [README](README.md)。这些都是通用扩展点，框架不内置任何项目的 ID、支付回调、鉴权或数据库规则。
+
+## 1. 保留标准 Handler 与中间件
+
+```go
+app := omni.New(omni.WithLogger(true))
+app.Use(httpx.WrapMiddleware(existingMiddleware)) // func(http.Handler) http.Handler
+// go-zero 风格的 func(http.HandlerFunc) http.HandlerFunc：
+app.Use(httpx.WrapFuncMiddleware(existingFuncMiddleware))
+app.POST("/legacy", httpx.WrapHandler(http.HandlerFunc(existingHandler)))
+```
+
+实际使用时先配置所有 `Use`，再注册路由。`WrapHandler` 也接受 `http.FileServer` 等标准 `http.Handler`。
+
+- Handler 经过 App 的日志、requestId、恢复和应用中间件链，原来的 URL、状态码、Header、响应内容由它自己控制。
+- `c.Raw()` 的写入也会更新 `c.Status()` / `c.Responded()`；404 会记为 404。提交响应后返回错误或 panic，不会再追加错误 JSON。103 等临时响应不算最终提交。
+- 桥接器不缓存完整响应。下载继续流式复制；底层支持时保留 Flusher、Hijacker、Pusher、ReaderFrom、CloseNotifier。`http.ResponseController` 可沿 `Unwrap` 访问底层控制能力。能力仍取决于网络适配器和其他中间件。
+- 请求 context、取消信号和已有值继续传递，Omni 的路径参数可用 Go 1.22 的 `r.PathValue("id")` 读取。其他框架私有的参数读取器仍需由项目适配。标准中间件应从原 `r.Context()` 派生上下文；不能换成无关的 Background，也不能在 ServeHTTP 返回后调用 next。异步 timeout middleware 不在此桥接器的契约内。
+- 标准中间件在每条注册链构造一次，状态会跨请求保留。下游返回的错误在标准中间件退出前编码，因此压缩、审计等中间件能处理错误响应。它们自己的缓冲或改写行为仍由项目负责。
+
+调用流使用 `App.Handle/GET/POST` 等入口即可，不要绕到原始 Router 注册。暂不使用 `.api` 的旧接口也能这样接入。
+
+## 2. 动态 JSON：允许渐进补全 DTO
+
+```go
+type LegacyReply {
+    Data any `json:"data"`
+}
+```
+
+`interface{}` 是 `any` 的等价写法，支持 `[]any`、`map[string]any` 和对应的 `interface{}` 写法。带方法的 interface 不支持，会提示明确的类型错误。
+
+动态字段允许 object、array、string、number、bool、null；OpenAPI 字段 schema 为 `{}`，不假装知道内部结构。它放开的是**该字段的内容**，外围 DTO 未声明的字段仍被拒绝，JSON 重复键、深度、总大小限制仍生效。动态数字解析为 `json.Number`，避免大整数先转 float64 丢精度。原始 JSON 的空白、转义和字节布局不会保留；验签请走原始 body 入口。
+
+这不会自动补齐缺少的业务路由，也不代表兼容全部 goctl 语法。能确定结构的新接口优先使用命名 DTO。
+
+## 3. 按路由限制 body 与保留手写入口
+
+普通 JSON 路由只声明需要的大小，不改变其他路由默认的 1 MiB：
+
+```text
+@body (mode: json
+    maxBytes: 2097152
+)
+@handler createItem
+post /items (CreateItemReq) returns (ItemResp)
+```
+
+`maxBytes` 单位为字节，允许 1 至 1 TiB；不写时为 1 MiB。已知超长或读取未知长度/chunked body 超限都按 413 处理。内置 App/RouterGroup 在全局中间件读取前安装 reader 限额；同时保持接口响应策略。网络层若有更小限额，以更小值为准。手写 Handler 吞掉读取错误或已经提交响应后，框架不能重新改写 HTTP 状态，务必检查读取错误。
+
+### 只替换绑定函数
+
+```text
+@binding custom
+@body (mode: json
+    maxBytes: 65536
+)
+@handler createItem
+post /items (CreateItemReq) returns (ItemResp)
+```
+
+首次生成 `internal/handler/<group>/createItemBind.go`：
+
+```go
+func (h *Handler) bindCreateItem(c *httpx.Context, req *types.CreateItemReq) error {
+    // 调用项目自己的解码器，填充 req；失败返回 error。
+}
+```
+
+Handler 继续调用 Service 并使用统一响应；只把绑定过程交给这个函数。初始 hook 返回 501，不能忽略实现。自定义绑定需自己实现 Content-Type、未知字段、尾部数据等校验，并遵守 DTO 文档；框架负责路由总大小限制，不隐式套第二次 JSON 绑定。
+
+### 上传、原文验签、下载
+
+```text
+@handlerMode manual
+@body (mode: multipart
+    maxBytes: 10485760
+)
+@handler upload
+post /files
+
+@handlerMode manual
+@body (mode: raw
+    maxBytes: 65536
+)
+@produces "text/plain"
+@handler callback
+post /callback
+
+@handlerMode manual
+@produces "application/octet-stream"
+@handler download
+get /download
+```
+
+首次生成 `<operation>Manual.go`，由项目实现整个 `func(h *Handler) Callback(c *httpx.Context) error`；依赖通过 `h.deps` 访问。生成器保留路由、中间件与文档管理，不会预读、JSON 解码或重新包装手写输出，也不生成这个路由的 Service 方法。需要调用 Service 时自行组合。
+
+- manual 无返回类型默认成功状态 200；也可 `returns (UploadResp)` 描述 JSON DTO，手写实现按声明调用 `c.OK` 等。`@produces` 用于无 DTO 的手写输出，描述成功响应媒体类型，不会自动设置运行时 Header。
+- raw 的文档为二进制请求体；multipart 为开放对象，具体文件字段与逐部分校验由项目实现。raw/multipart 请求 DTO 仅可含 path/form/header 字段，不能同时声明 JSON body 字段。`form` 始终指 URL query。
+- 原文验签直接读取 `c.Request().Body`，在声明的小限额内 `io.ReadAll`；大文件用 `MultipartReader` 配合 `io.Copy` 流式处理，不能整个读入内存。
+- 使用 `ParseMultipartForm` 时，其内存参数只是内存阈值，不是总上传限额。App/桥接器在请求结束（含错误和 panic）后删除临时文件；业务仍须关闭 `FormFile` 得到的文件。`MultipartReader` 不自动建临时文件，业务自行创建的文件由业务清理。
+- 手写 Handler 的成功输出由它控制；返回的 error、鉴权拒绝仍走接口的错误策略。三方若要求错误也返回指定文本，使用 [自定义 Encoder](RESPONSE.md#手写路由配置文件与三方回调) 并维护对应错误文档；`@produces` 不会改变错误协议。
+
+直接注册 Go 路由：
+
+```go
+app.HandleWithBodyLimit("POST", "/upload", 10<<20, nil, uploadHandler)
+// nil encoder 沿用 App 策略，也可传项目自己的 response.Encoder。
+```
+
+通用注册器使用 `httpx.HandleWithBodyLimit(...)`；实现 `httpx.BodyLimitRegistrar` 可像 App 一样在全局中间件前限流量，未实现时只能在路由中间件入口限制。单独 `httpx.LimitBody` 同样受中间件顺序影响。
+
+### 重新生成规则
+
+`handlersGen.go`、`routesGen.go`、DTO、OpenAPI 继续由生成器管理；`*Bind.go`、`*Manual.go` 只首次创建，后续不会覆盖或删除。切换 manual 回自动模式时，先迁移实现并自行移除对应 Manual 文件，否则生成器明确拒绝，避免重复方法。修改 DTO 导致手写函数签名不匹配时，需要一起调整项目代码；`go test ./...` 是必要检查。
+
+## 4. 自定义标量：项目定义行为，框架连接调用
+
+例如输入 ID 兼容数字/字符串、输出统一为字符串：
+
+```text
+scalar BusinessID (
+    goImport: "example.com/billing/internal/ids"
+    goType: ID
+    jsonInput: string | int64
+    jsonOutput: string
+    text: true
+)
+type ItemReq {
+    ID BusinessID `path:"id"`
+}
+type ItemResp {
+    ID BusinessID `json:"id"`
+}
+```
+
+`goImport`/`goType` 指向项目已有的具体 Go 类型，不是框架内置 ID。生成器创建类型别名和 `types.ContractScalars()`，然后把注册表显式传给每个 Binder。运行时使用标准接口：
+
+| 项目类型的方法 | 用途 |
+| --- | --- |
+| 值接收者 `MarshalJSON() ([]byte, error)` | JSON 输出 |
+| 指针接收者 `UnmarshalJSON([]byte) error` | JSON 输入 |
+| 指针接收者 `UnmarshalText([]byte) error` | `text: true` 时的 path/query/header |
+
+完整参考 [示例 ID 类型](examples/compatibility/ids/id.go)。CLI 校验声明并生成代码，不执行项目 Go 代码；启动时校验方法是否齐全，缺失会明确失败。
+
+输入可选 `string`、`bool`、`int32`、`int64`、`float64`，用 `|` 声明多个允许的 JSON 类型；输出只声明一个。框架先校验 JSON 类型和数字范围，再调用项目转换方法。字符串是否是合法 ID、是否允许空串或负数由项目方法决定，不能把数字溢出静默截断。path/query/header 实际传输文本，OpenAPI 对这些位置描述 string；query 切片通过重复键传递。
+
+普通字段不受注册影响，普通 `int64` 仍拒绝 JSON 字符串。没有全局注册表，也不会自动给所有 ID 放宽规则。标量可嵌套、放入切片/map，`*BusinessID` 允许 null；缺失默认必填，`optional`/`omitempty` 可选。标量的额外约束放在转换器中，目前不叠加 `binding`、default/options/range 等标签。
+
+请求 OpenAPI 按 `string | int64` 生成 `anyOf`，响应按 `string` 生成，避免把输入兼容误描述为输出也有两种类型。输出方法必须遵守声明，框架不会每次重新验证响应；项目需为自定义类型测试边界行为。
+
+不使用 `.api` 也可显式注册：
+
+```go
+binder := contract.MustNew[CreateReq](
+    contract.ScalarOf[ids.ID]("string|int64", "string", true),
+)
+// binder.Bind(c.Request(), httpx.RouteParams(c.Context()), &req)
+```
+
+## 可运行示例与验收
+
+```sh
+go run ./examples/compatibility
+curl -i http://127.0.0.1:8080/legacy
+curl -i -X POST http://127.0.0.1:8080/echo \
+  -H 'Content-Type: application/json' -d '{"id":9223372036854775807,"data":{"hello":true}}'
+curl -i -F file=@README.md http://127.0.0.1:8080/upload
+curl -OJ http://127.0.0.1:8080/download
+```
+
+完整契约：[compatibility.api](examples/contracts/compatibility.api)。生成项目起初的手写 hook 仍为 501；真实实现与原文 HMAC 验签回归见 [消费者 fixture](cmd/go-omni/apigen/testdata/compatibility)。
+
+```sh
+GO_OMNI_SCAFFOLD_INTEGRATION=1 go test -race ./cmd/go-omni/apigen -run Compatibility
+go test -race ./httpx ./contract
+```
+
+这些是框架验收，不代表任何业务项目已经迁移完毕；业务的路由覆盖、响应兼容、权限、资金事务和数据库行为需要业务自己的回归。

MODULES.md

@@ -2,7 +2,7 @@
 
 第二批的共享 Redis 中间件、可靠队列、多平台存储及其他模块见 [扩展模块](ADVANCED.md)。下文的单进程约束指本页原有默认实现。
 
-这批能力位于 main，尚未包含在 `v0.6.0-preview` 标签中。统一示例见
+这批能力从 `v0.7.0-preview` 提供。统一示例见
 [examples/modules](examples/modules/README.md)。业务入口继续使用 `omni.New`，中间件依赖
 `httpx`，不依赖具体服务端网络实现。各模块按需创建、注入 Service，再注册到应用关闭流程。
 

README.md

@@ -1,302 +1,400 @@
 # GoOmni
 
-GoOmni 是一套面向业务复用的 Go 后端基础框架。当前默认使用只依赖标准库的网络适配器，业务代码只依赖 GoOmni 的 transport-neutral API，后续可以替换为自研网络层。
+GoOmni 是面向多个业务项目复用的 Go 后端框架：用 `.api` 定义接口、请求和返回类型，生成项目目录、HTTP 接入代码及 OpenAPI，业务代码负责 Service 和 Repository。也可以在已有项目中直接使用 `omni.New()`，或单独引入日志、存储等模块。
 
-远程 module 地址是 `git.yuntuo.hk/k2safe/go-omni`。业务项目可以直接引用指定版本：
+**从这份 README 开始即可接入。** 当前版本为 **`v0.9.1-preview`**，Go **1.22+**；CLI 和项目依赖使用同一固定版本。框架不依赖 Gin，默认使用标准库网络层，提供可切换的 native HTTP/1.1 和实验性 HTTP/2 适配器。
+
+响应字段、业务码、登录方式、权限规则和数据库表结构由接入项目决定。文中的 `code/msg/data`、`200/9999` 都是示例配置，可以替换。
+
+## 选择接入方式
+
+| 你的项目 | 从哪里开始 |
+| --- | --- |
+| 新建服务，先定义接口再开发 | [新项目：生成并运行](#新项目生成并运行) |
+| 已有服务，逐步接入 HTTP 或基础模块 | [已有项目：按模块接入](#已有项目按模块接入) |
+| 已有标准 Handler、动态 JSON、上传或自定义 ID 类型 | [迁移扩展指南](MIGRATION.md) |
+| 想统一返回体、业务错误或三方回调 | [配置公共响应与独立协议](#配置公共响应与独立协议) |
+| 要接日志、数据库、鉴权和存储 | [业务开发与依赖装配](#业务开发与依赖装配) |
+| 要切换网络层、配置 TLS 和退出清理 | [配置与运行](#配置与运行) |
+| 已接入，需要升级和检查生成代码 | [日常开发与升级](#日常开发与升级) |
+
+## 准备环境与安装
+
+module 地址是 `git.yuntuo.hk/k2safe/go-omni`。先确保本机 Go 和 Git 可用，并具有仓库读取权限；使用自己的 Git 凭据管理器，不把账号或 Token 写进 module 地址。
+
+以下命令在同一个终端执行。已有 `GOPRIVATE` 时，把 `git.yuntuo.hk` 追加到原来的逗号分隔列表。
 
 ```sh
-go get git.yuntuo.hk/k2safe/go-omni@v0.6.0-preview
+export GOPRIVATE=git.yuntuo.hk
+go install git.yuntuo.hk/k2safe/go-omni/cmd/go-omni@v0.9.1-preview
+export PATH="$(go env GOPATH)/bin:$PATH"
+go-omni --help
 ```
 
-`v0.4.0` 移除了 Gin 和 Gin 专属的 `WithMode` 配置；`omni.New()` 直接使用标准库路由，已有业务 Handler / Service 无需修改。
+如果配置了自定义 `GOBIN`，将那个目录加入 PATH。只引用框架包、不生成项目时可以跳过 CLI 安装，直接使用下文的 `go get`。
 
-创建新业务项目：
+## 新项目：生成并运行
+
+在准备存放业务项目的目录执行，`./hello` 必须是新目录或空目录；把 `example.com/hello` 换成自己的 Go module 名称。
 
 ```sh
-go install git.yuntuo.hk/k2safe/go-omni/cmd/go-omni@v0.6.0-preview
-go-omni new --module example.com/billing ./billing
-cd billing
+go-omni api new --framework-version v0.9.1-preview \
+  --module example.com/hello ./hello
+cd hello
 go mod tidy
 go run ./cmd/server
 ```
 
-远程安装的 CLI 默认引用自身版本，生成的项目不需要本地 `replace`。
-具体版本和本地开发选项见 [CLI 文档](cmd/go-omni/README.md)。
+另开终端验证：
 
-需要数据库持久化时，使用 `go-omni new --database mysql --module example.com/billing ./billing`。
-生成项目包含完整用户 CRUD、数据库 Repository、ServiceContext、建表脚本和就绪探针。
-先应用生成的 `schema.sql`，再配置 `GO_OMNI_DB_DSN`；启动时会检查连接与表结构，退出时释放连接池。
-
-## 目录结构
-
-```text
-go-omni/
-├── app/          # 应用启动和生命周期
-├── httpx/        # 与网络框架无关的 HTTP 抽象
-├── response/     # 统一响应
-├── errors/       # 统一错误
-├── health/       # 存活和就绪检查
-├── middleware/   # 请求 ID 等基础中间件
-├── logx/         # 业务层结构化日志
-├── metrics/      # 请求指标与状态统计
-├── config/       # 配置管理
-├── validate/     # 参数校验
-├── auth/         # 认证和权限接口
-├── database/     # database/sql 生命周期和事务
-├── cache/        # 有界内存缓存、Redis 适配与合并回源
-├── httpc/        # 出站 HTTP 连接池、超时和重试
-├── task/         # 有界后台任务与间隔调度
-├── queue/        # 持久队列接口与 Redis Streams 适配
-├── storage/      # Local、S3/R2、OSS 与临时下载链接
-├── openapi/      # 路由和 OpenAPI 3.0.3 契约
-├── telemetry/    # 可注入 OpenTelemetry 观测
-├── resilience/   # 熔断与上游并发隔离
-├── audit/        # 显式业务审计与可注入 Sink
-├── pagination/   # 有界分页和统一结果
-├── transport/nethttp/ # 标准库网络适配器
-├── transport/native/  # 自研 HTTP/1.1 服务端预览
-├── transport/http2/   # opt-in HTTP/2 实验适配器
-├── examples/     # 示例项目
-└── cmd/          # go-omni 项目脚手架
+```sh
+curl -i http://127.0.0.1:8080/api/greet/Alice
+curl -i http://127.0.0.1:8080/health/ready
+curl -sS http://127.0.0.1:8080/openapi.json
 ```
 
-main 分支新增缓存、出站 HTTP、限流/幂等/超时中间件、后台任务和 `go-omni add` 模块脚手架。
-使用方式、默认容量和进程内能力的适用范围见 [业务基础模块](MODULES.md)，
-可以直接运行 [组合示例](examples/modules/README.md)。这些新增能力尚未包含在上面的历史版本标签中。
+第一个接口返回 HTTP 200，业务数据为 `{"message":"Hello Alice"}`。初始模板未配置响应格式，使用默认公共体：
 
-扩展模块还包括 JWT/Session、Policy、文件配置及安全热更新、Redis 共享中间件、持久队列、多平台对象存储、OpenAPI、OpenTelemetry、熔断、迁移、审计和分页。
-使用与边界见 [扩展模块](ADVANCED.md)，可运行 [文件服务组合示例](examples/platform/README.md)。go-omni 不集成 Orbit；需要流程编排的业务项目独立接入。
+```json
+{"code":"OK","message":"success","data":{"message":"Hello Alice"},"requestId":"本次请求编号"}
+```
 
-## 快速开始
+按 Ctrl+C 停止服务。项目依赖已固定为远程版本，不需要克隆框架源码或添加本地 `replace`。
+
+### 生成的项目放什么
+
+```text
+hello/
+├── api/service.api                  # 维护接口定义，也可 import 其他 .api
+├── cmd/server/main.go               # 启动、路由注册、优雅退出
+├── etc/config.yaml                  # 项目配置
+├── internal/
+│   ├── settings/                    # 配置读取
+│   ├── servicecontext/              # 数据库、日志、外部客户端等依赖
+│   ├── types/typesGen.go            # 生成的请求与业务返回类型
+│   ├── handler/                     # 生成的绑定、响应策略、路由及文档
+│   ├── service/greet/               # 在这里实现业务逻辑
+│   ├── repository/greet/            # 在这里实现数据访问
+│   └── middleware/                  # 声明鉴权等中间件后生成对应 hook
+├── docs/openapi.json                # 生成的 OpenAPI 3.0.3
+└── .goOmni/apiManifest.json         # 生成文件所有权与校验信息，一起提交 Git
+```
+
+修改 `api/service.api` 后重新生成，业务写在 `internal/service`，数据访问写在 `internal/repository`，依赖在 `internal/servicecontext` 装配。声明业务错误后还会生成 `internal/apierrors/errorsGen.go`。
+
+`api new` 的问候接口可以直接运行；自定义接口新生成的 Service 和鉴权 hook 返回 **501**，需要实现后才可用。生成器不会根据 HTTP 字段猜数据库表或业务规则。
+
+### 从自己的接口定义生成
+
+保存下面的完整示例为 `catalog.api`，再执行后面的生成命令。这里的响应格式、错误码和提示都由这个业务项目定义。
+
+```text
+syntax = "v1"
+
+response CommonResponse (
+    body: {"code":"${code}", "msg":"${message}", "data":"${data}"}
+    codeType: int32
+    successCode: 200
+    errorCode: 9999
+    successMessage: "操作成功"
+    dataMode: always
+    codes: {"ITEM_NOT_FOUND":404001}
+)
+
+error ItemNotFound 404 "ITEM_NOT_FOUND" "记录不存在"
+
+type GetItemReq {
+    ItemID string `path:"itemId" binding:"required"`
+}
+type ItemResp {
+    ItemID string `json:"itemId"`
+    Name string `json:"name"`
+}
+
+@server (
+    group: item
+    prefix: /api/v1
+    response: CommonResponse
+)
+service catalog-api {
+    @doc "查询商品"
+    @errors ItemNotFound
+    @handler getItem
+    get /items/:itemId (GetItemReq) returns (ItemResp)
+}
+```
+
+```sh
+go-omni api validate --api catalog.api
+go-omni new --api catalog.api --framework-version v0.9.1-preview \
+  --module example.com/catalog ./catalog
+cd catalog
+go mod tidy
+```
+
+将生成的 `internal/service/item/getItem.go` 替换为下面的演示实现。实际业务中换成 Repository 查询，Service 返回业务数据或错误，不再手工包装公共体：
+
+```go
+package item
+
+import (
+    "context"
+
+    "example.com/catalog/internal/apierrors"
+    "example.com/catalog/internal/types"
+)
+
+func (s *Service) GetItem(ctx context.Context, req *types.GetItemReq) (*types.ItemResp, error) {
+    if req.ItemID != "1001" {
+        return nil, apierrors.ItemNotFound()
+    }
+    return &types.ItemResp{ItemID: req.ItemID, Name: "示例商品"}, nil
+}
+```
+
+示例 import 对应上面的 `example.com/catalog`，使用其他 module 名称时同步替换。启动后，在另一个终端验证：
+
+```sh
+# catalog 项目目录中启动；先停掉前面的 hello 服务，释放 8080 端口。
+go run ./cmd/server
+# 另一个终端：
+curl -i http://127.0.0.1:8080/api/v1/items/1001
+curl -i http://127.0.0.1:8080/api/v1/items/missing
+```
+
+成功时得到 `{"code":200,"msg":"操作成功","data":{"itemId":"1001","name":"示例商品"}}`；不存在时为 HTTP 404、`{"code":404001,"msg":"记录不存在","data":null}`。
+
+需要 MySQL、文件存储或文件日志时，**首次生成**可以使用：
+
+```sh
+go-omni new --api catalog.api --framework-version v0.9.1-preview \
+  --module example.com/catalogFull --database mysql --storage local \
+  --log-output file --log-format json ./catalogFull
+```
+
+该命令在 `catalog.api` 所在目录执行，目标仍需是新目录。数据库迁移、表结构和 Repository 由项目维护，API 模板不自动建表；MySQL DSN 通过 `GO_OMNI_DB_DSN` 提供。存储还可选 `s3`、`r2`、`oss`，按生成项目的配置说明提供桶、端点和凭据。完整装配例子见 [userService](examples/userService/README.md)。
+
+不采用 `.api` 时，也可以用 `go-omni new --framework-version v0.9.1-preview --module example.com/billing ./billing` 创建手写接口的 CRUD 示例项目；两种生成方式选择一种即可。
+
+## 已有项目：按模块接入
+
+在业务项目的 **go.mod 所在目录**执行：
+
+```sh
+go get git.yuntuo.hk/k2safe/go-omni@v0.9.1-preview
+```
+
+已有项目可直接复用现有目录、Service、Repository 和数据库连接，先选择一个接口接入。也可以只用 `logx`、`storage` 等包，暂时保留原来的 HTTP 框架。
+
+下面是可独立运行的 `main.go` 示例；迁入现有项目时，把路由调用接到自己的业务服务即可。
 
 ```go
 package main
 
-import omni "git.yuntuo.hk/k2safe/go-omni"
-
-func main() {
-	app := omni.New()
-
-	app.GET("/health", func(ctx *omni.Context) error {
-		return ctx.OK(map[string]string{"status": "ok"})
-	})
-
-	app.Run(":8080")
-}
-```
-
-成功响应默认使用统一结构：
-
-```json
-{
-  "code": "OK",
-  "message": "success",
-  "data": {"status": "ok"},
-  "requestId": "..."
-}
-```
-
-业务错误可以直接返回：
-
-```go
-return omni.NotFound("USER_NOT_FOUND", "user was not found")
-```
-
-默认网络适配器位于 `transport/nethttp`。业务层不需要导入具体网络库；如果后续实现自己的网络层，只需要实现 `httpx.Router` / `httpx.RouterGroup`，然后通过 `omni.NewWithRouter` 启动应用：
-
-```go
-application := omni.NewWithRouter(myRouter)
-```
-
-仓库还提供了使用标准库路由的 `transport/nethttp` 参考实现。两种适配器已通过同一套路由、业务处理链和取消传播测试，完整用户 CRUD 复用同一份 Handler / Service。
-
-自研适配器可以直接运行 `transport/transporttest.Run` 验收。具体规则、v0.4.0 的斜杠 / Any / 405 行为调整，以及自研网络内核与当前 HTTP 接口的边界，见 [适配层契约](transport/README.md)。
-
-`app.Engine()` 返回标准 `http.Handler`，`ctx.Raw()` 返回适配器提供的 `http.ResponseWriter`，业务 API 不锁定具体网络实现。
-
-需要试用第一版自研网络层时，业务注册代码无需改变，只替换启动器：
-
-```go
 import (
-	"context"
-	"log"
-	"os"
-	"os/signal"
-	"syscall"
+    "log"
+    "net/http"
 
-	omni "git.yuntuo.hk/k2safe/go-omni"
-	"git.yuntuo.hk/k2safe/go-omni/transport/native"
+    omni "git.yuntuo.hk/k2safe/go-omni"
+    "git.yuntuo.hk/k2safe/go-omni/logx"
+    "git.yuntuo.hk/k2safe/go-omni/response"
 )
 
-ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
-defer cancel()
+func main() {
+    if err := run(); err != nil {
+        log.Fatal(err)
+    }
+}
 
-app := omni.New()
-app.GET("/health", func(ctx *omni.Context) error {
-	return ctx.OK(map[string]string{"status": "ok"})
-})
-if err := app.RunWith(ctx, native.New(nil), ":8080"); err != nil {
-	log.Fatal(err)
+func run() error {
+    closeLog, err := logx.Setup(logx.Config{
+        Service: "catalog", Level: "info", Format: "json", Output: "stdout",
+    })
+    if err != nil {
+        return err
+    }
+    defer closeLog()
+
+    app := omni.New(
+        omni.WithLogger(true),
+        omni.WithResponse(response.Config{
+            Body: map[string]any{
+                "code": "${code}", "msg": "${message}", "data": "${data}",
+            },
+            CodeType: "int32", SuccessCode: 200, ErrorCode: 9999,
+            SuccessMessage: "操作成功", DataMode: "always",
+            Codes: map[string]any{"ITEM_NOT_FOUND": 404001},
+        }),
+    )
+    app.GET("/api/v1/items/:itemId", func(c *omni.Context) error {
+        itemID := c.Param("itemId")
+        logx.InfoContext(c.Context(), "item.get", "itemId", itemID)
+        if itemID != "1001" {
+            return omni.NotFound("ITEM_NOT_FOUND", "记录不存在")
+        }
+        return c.OK(map[string]string{"itemId": itemID, "name": "示例商品"})
+    })
+    // 第三方协议可明确输出文本，不经过公共 JSON 包装。
+    app.GET("/ping", func(c *omni.Context) error {
+        return c.Text(http.StatusOK, "pong")
+    })
+    return app.Run("127.0.0.1:8080")
 }
 ```
 
-`transport/native` 当前支持 HTTP/1.1、Keep-Alive、`Content-Length` 和 chunked 请求体、`http.Flusher` 流式响应、可选 TLS、读写超时和优雅关闭；不支持的传输编码会被拒绝。它会复用连接状态和响应对象，并可通过 `MaxConnections`、`MaxConcurrentRequests` 限制内存峰值。它仍通过标准 HTTP 请求/响应接口连接业务层，适合在现有 Handler / Service 上做网络层验证。
+运行 `go run .`，访问 `/api/v1/items/1001`、`/api/v1/items/missing` 和 `/ping`，可分别验证成功、业务错误及纯文本输出。`App` 实现标准 `http.Handler`，也可挂进现有 `http.Server` 或父路由；这时监听、TLS、信号和资源关闭由现有入口负责，结束时调用 `app.Close()`。
 
-native TLS 当前只支持并宣告 ALPN `http/1.1`；配置 `h2` 会在启动时快速失败。需要 HTTP/2 时，可由 Nginx/Cloudflare 终止后回源 HTTP/1.1，或使用默认的 `transport/nethttp` 适配器。
+现有 `http.HandlerFunc` 可直接通过 `app.POST("/legacy", httpx.WrapHandler(http.HandlerFunc(oldHandler)))` 接入；状态码与访问日志一致，下载和流式输出保持原协议。标准中间件、动态 JSON、上传/原文 body、手写绑定和自定义类型的完整用法见 [迁移扩展指南](MIGRATION.md)。
 
-`transport/http2` 是独立的 opt-in 实验适配器，使用 `x/net/http2` 处理帧和流控，同时保留 GoOmni 的连接上限、全局请求并发闸门和生命周期边界。它不会改变 native 默认路径；实验入口、限制和验收结果见 [HTTP/2 进入条件](transport/native/HTTP2.md)。
+接入现有业务时，逐项确认：
 
-自研网络层还提供 `server.Stats()`，可读取 accepted、rejected、active connections 和 active requests，与上面的业务请求 metrics 组合后能区分连接堆积、过载拒绝和 Handler 慢请求。`rejectedConnections` 表示连接闸门拒绝数，`rejectedRequests` 表示并发请求闸门返回 503 的次数。
+- **协议**：保留既有 URL、HTTP 状态、字段、分页和空值语义。已有业务错误类型需要在项目内转换为 Omni 错误，或使用 `WithResponseEncoder` 适配原错误；设置字段模板不会自动识别其他库的错误。
+- **鉴权**：把现有登录态和权限校验接入中间件，继续使用原来的授权范围和业务规则。原来依赖 `gin.Context` 等类型的 HTTP 代码需要适配；标准 `context.Context` 的业务服务可以继续复用。
+- **数据类型**：ID、金额、日期等按项目协议转换。用 `.api` 的 `scalar` 显式关联项目自己的类型与 JSON/Text 转换方法，分别声明输入和输出协议；普通字段保持严格绑定，见 [自定义标量](MIGRATION.md#4-自定义标量项目定义行为框架连接调用)。
+- **生成器**：它不会自动接管任意已有 Go 项目。希望引入 `.api` 时，先在独立新目录生成对照，再规划路由与生成目录的接入，不要用脚手架覆盖现有业务目录。
 
-业务代码可以直接使用 `git.yuntuo.hk/k2safe/go-omni/logx` 打结构化日志，不需要依赖具体网络库：
+先通过一个接口的成功、参数错误、未登录、无权限及业务错误回归，再按模块迁移。框架不要求所有项目使用同一套业务目录或身份模型。
 
-```go
-func (s *UserService) Create(ctx *httpx.Context) error {
-	logx.InfoContext(ctx.Context(), "user.create", "email", input.Email)
-	return nil
-}
-```
+## 配置公共响应与独立协议
 
-需要基础运行指标时，可以注册 transport-neutral metrics middleware 和接口：
-
-```go
-requestMetrics := omni.NewMetrics()
-app.Use(requestMetrics.Middleware())
-app.GET("/metrics", requestMetrics.Handler())
-```
-
-接口返回请求总数、错误数、当前处理中请求、累计耗时和 HTTP 状态分布。它是进程内快照，生产环境可由业务侧定时采集到监控系统。
-
-`WithLogger(true)` 会启用 GoOmni 的统一 HTTP 访问日志；日志内容和业务日志共用 `requestId`。应用启动时可以调用 `logx.Setup` 配置 JSON/文本格式、级别、服务名和输出文件。
-
-应用配置可以统一从 `GO_OMNI_*` 环境变量加载，再交给 `omni.New`：
-
-```go
-settings, err := omni.LoadConfig("")
-if err != nil {
-	log.Fatal(err)
-}
-logger, err := logx.New(settings.Log)
-if err != nil {
-	log.Fatal(err)
-}
-application := omni.New(omni.WithConfig(settings))
-application.OnShutdown(logger.Close)
-```
-
-常用变量包括 `GO_OMNI_ENABLE_LOGGER`、`GO_OMNI_LOG_LEVEL`、
-`GO_OMNI_LOG_FORMAT`、`GO_OMNI_LOG_OUTPUT`、`GO_OMNI_SERVICE`、
-`GO_OMNI_ENVIRONMENT`、`GO_OMNI_HTTP_ADDR`、`GO_OMNI_SHUTDOWN_TIMEOUT` 和
-`GO_OMNI_TRUSTED_PROXIES`。可信代理变量使用逗号分隔的 IP/CIDR，例如
-`GO_OMNI_TRUSTED_PROXIES=127.0.0.1,10.0.0.0/8`；只有来自这些地址的连接才会解析
-`X-Forwarded-For`，默认只记录 socket 对端地址。数据库连接仍由
-`database.ConfigFromEnv` 从 `GO_OMNI_DB_*` 加载。
-
-网络层也由同一份配置选择，Handler / Service / Repository 不需要导入具体适配器：
-
-| 配置 | 默认值 / 用途 |
+| 接口来源或需求 | 配置位置 |
 | --- | --- |
-| `GO_OMNI_TRANSPORT` | `nethttp`；可选 `native`、`http2` |
-| `GO_OMNI_TLS_CERT_FILE` | TLS 证书 PEM 文件路径 |
-| `GO_OMNI_TLS_KEY_FILE` | TLS 私钥 PEM 文件路径，必须与证书一起配置 |
-| `GO_OMNI_SHUTDOWN_TIMEOUT` | `10s`，三种适配器共用的请求排空时间 |
+| `.api` 生成的接口 | `response Name (...)` 定义，`@server (response: Name)` 引用 |
+| 多个 `.api` 共用返回体 | 将声明放到 `common.api`，使用 `import "common.api"` |
+| 某个生成接口用另一种 JSON 公共体 | 路由声明 `@response OtherResponse` |
+| 只要业务 JSON、无成功包装 | 路由声明 `@response raw`；失败仍沿用组级格式 |
+| 手写路由和应用级 404/405 | `omni.WithResponse(response.Config{...})`，或读取配置后传入 `WithConfig` |
+| 成功和失败都要遵循特殊回调协议 | `HandleWithResponse` 绑定项目自己的 `response.Encoder` |
+| 单次直接输出 JSON、文本、XML、字节或空响应 | `c.JSON` / `c.Text` / `c.XML` / `c.Bytes` / `c.NoContent` |
 
-例如运行自研 HTTP/1.1，或显式试用独立 HTTP/2 适配器：
+`${data}` 是业务返回值，`${message}` 是公开提示，`${code}` 是业务码；占位符保留原值类型，不是字符串拼接。还支持 `${requestId}`、`${ok}`、`${status}`，字段名和嵌套结构由项目决定。
 
-```sh
-GO_OMNI_TRANSPORT=native go run ./examples/reference
-GO_OMNI_TRANSPORT=http2 GO_OMNI_HTTP_ADDR=127.0.0.1:8443 \
-  GO_OMNI_TLS_CERT_FILE=./server.crt GO_OMNI_TLS_KEY_FILE=./server.key \
-  go run ./examples/reference
-```
+- `codeType` 可以是 `string`、`int32`、`int64`；整数类型需要配置 `successCode` 和 `errorCode`。
+- `codes` 把逻辑错误码映射成对外业务码；未单独映射的失败使用 `errorCode`。JSON 业务码不会改变 HTTP 状态，例如 `404001` 仍对应 HTTP 404。
+- `successMessage` 设置成功提示；未设置 `errorMessage` 时沿用错误的公开提示。`messages` 可按逻辑错误码单独覆盖，优先级最高。全局 `errorMessage` 会替换未单独映射的所有失败提示，只有需要统一失败文案时才设置。
+- `dataMode: always` 在无数据时输出 null；默认 `omitNil` 省略模板里相应对象字段。没有 `returns` 的 `.api` 路由默认 HTTP 204、无响应体，这与 `200 + data:null` 是不同的接口契约。
 
-`http2` 必须配置 TLS；native TLS 只协商 `http/1.1`，nethttp TLS 支持标准库的 HTTP/1.1 和 HTTP/2。
-未知适配器、缺少配对证书、无法加载证书时，`Run` / `RunContext` 在监听前返回错误并执行资源清理，不会退回其他协议。
-HTTP/2 仍为实验适配器，尚未合并到 native 多协议监听器。
+**生成接口的格式以 `.api` 为准**，修改后重新生成，运行时与 OpenAPI 一起更新；应用 YAML 不会覆盖它。404/405 没有匹配到某个 `.api` 接口，使用应用默认配置，需要统一时也配置应用默认值。
 
-代码配置可写成 `omni.New(omni.WithTransport(omni.TransportNative), omni.WithTLS(certFile, keyFile))`。
-`ServeContext(ctx, listener)` 使用相同配置并接管已有 listener；失败或退出时也会关闭它。
-`RunWith(ctx, runner)` 保留自定义网络层入口，由 runner 自己管理 TLS、超时和网络参数；连接/请求上限等适配器专属选项仍通过这个入口设置。
-`NewServer` 仅创建标准库明文服务器，配置选择应用于 `Run`、`RunContext` 和 `ServeContext`。
-三种适配器的配置、真实 TLS 业务和关闭行为已通过 Linux 全量 race 及 10 次重复回归，见 [统一启动验收](performance/transportStartup.md)。
+文本/XML 回调用 Go 编码器或直接输出，`.api` 可用 `@handlerMode manual` 与 `@produces` 声明成功媒体类型；特殊错误协议仍需项目维护。`@response raw` 仅表示原始 JSON。前面示例的 `c.Text` 控制这次正常返回；需要连鉴权失败、业务错误和 panic 都按回调协议响应时使用 `HandleWithResponse`。完整配置和回调示例见 [响应参考](RESPONSE.md)。
 
-`App` 同时实现标准 `http.Handler`。`Run` 监听 `SIGINT` / `SIGTERM`；`RunContext` 则由调用方的 context 控制退出，生成项目已使用 `signal.NotifyContext` 接好信号。
-退出时先停止接收新请求，等待活跃请求完成，再执行资源清理。超过 `ShutdownTimeout` 时强制关闭连接、取消请求 context，并返回超时错误。业务代码应响应 context 取消；框架无法强制结束忽略取消的业务 goroutine。数据库连接池由 `database.Open` 创建，在服务退出时调用 `Close`。
+## 业务开发与依赖装配
 
-应用资源可以直接挂到 `omni.New` 返回的生命周期上：
+### 日志
+
+业务包直接使用 `logx`，不需要 HTTP 框架对象：
 
 ```go
-application := omni.New()
-application.OnShutdown(db.Close)
+// ctx 是 Service 接收的标准 context.Context。
+logx.InfoContext(ctx, "order.created", "orderId", orderID)
+logx.ErrorContext(ctx, "order.failed", "error", err)
 ```
 
-清理函数会按注册顺序的逆序执行，`application.Close()` 和 `RunContext` 都会触发，且重复调用安全。
+入口用 `logx.Setup` 初始化，退出时关闭；生成的 API 项目已经完成日志初始化和退出清理。Service、Repository 和外部请求持续传递请求的 `context.Context`，业务日志可关联 `requestId`，同时保留取消信号。框架不规定或自动注入 `userId`、`tenantId`。
 
-服务可以把数据库、缓存等依赖注册为就绪探针：
+`WithLogger(true)` 开启 HTTP 访问日志。格式、级别、文件轮转、脱敏键和慢请求阈值均可配置，见 [日志](logx/README.md)。
 
-```go
-checker, err := health.New(health.Probe{
-	Name: "database",
-	Check: db.PingContext,
-})
-if err != nil {
-	log.Fatal(err)
-}
-application.GET("/health/live", checker.LivenessHandler())
-application.GET("/health/ready", checker.ReadinessHandler())
+### 鉴权与业务错误
+
+`.api` 可声明认证方式和关联中间件，例如把下面的声明放入契约，并在相应 `@server` 块中加上 `auth: UserAuth`：
+
+```text
+auth UserAuth (
+    type: bearer
+    middleware: Auth
+)
 ```
 
-存活检查只确认进程在线；就绪检查会执行全部探针，任意依赖失败时返回 HTTP 503。
+生成器会创建 `internal/middleware/auth.go`，由项目实现凭据校验和身份注入。声明会生成路由绑定与 OpenAPI 的认证描述，**不会自动实现登录或授权规则**；未实现的 hook 返回 501。手写路由可使用 `auth.RequireAuth(authenticator)` 或自己的中间件。JWT、Session 和 Policy 按需选择。
 
-新项目脚手架会生成项目自己的 `internal/servicecontext`。它集中保存 Logger、数据库、缓存和外部客户端，Service 只依赖这个项目上下文，不把基础设施初始化散落到各个 Handler：
+业务错误在 `.api` 中用 `error` 声明，通过 `@errors` 关联路由后，生成可调用的错误函数和 OpenAPI 中对应的 401、403、409 等响应。手写路由可以直接返回 `omni.NotFound`、`omni.Forbidden` 等错误。已有项目在自己的适配层转换原错误，内部原因和公开提示分开处理。
 
-```go
-services, err := servicecontext.New(ctx, logger)
-if err != nil {
-	return err
-}
-defer services.Close()
-userService := service.NewUsers(services)
-```
+### 数据库、存储及其他模块
 
-## 完整业务参考项目
+依赖在启动入口或项目自己的 `internal/servicecontext` 中创建，通过构造函数传给 Service/Repository，避免每个请求都新建连接池。只注册自己拥有的资源，例如 `app.OnShutdown(db.Close)`；关闭按注册的逆序执行。
 
-[`examples/reference`](examples/reference/README.md) 提供按 Handler / Service / Repository / Model 分层的用户 CRUD 示例。默认使用并发安全的内存存储，支持分页、邮箱唯一校验、结构化请求日志和统一错误，无需配置数据库。
+已有项目使用 `driver.Connector` 时，直接 `database.OpenConnector(ctx, connector, database.DefaultPoolConfig())`。MySQL 等驱动的独立 TLS、Logger、时区与拨号参数由项目构造 Connector；框架负责连接池、启动 Ping、健康检查及事务。无需转成 DSN，也无需注册全局 TLS/Logger。具体示例和资源归属见 [Connector 接入](database/README.md#connector-接入v091-preview)。
 
-从远程版本生成并升级一个独立业务模块，可运行：
+| 能力 | 包与接入说明 |
+| --- | --- |
+| 数据库连接池、事务、显式迁移 | `database`，见 [数据库](database/README.md)；表结构与驱动由项目选择 |
+| 本地文件、S3、R2、OSS、直传与临时下载 | `storage`，见 [文件存储](storage/README.md)；业务依赖接口，装配时选择适配器 |
+| 缓存、出站 HTTP、限流、幂等、后台任务 | `cache`、`httpc`、`middleware`、`task`，见 [基础模块](MODULES.md) |
+| JWT/Session、策略、Redis 队列、审计、分页、观测 | 见 [扩展模块](ADVANCED.md)；按需注入实现 |
+| 存活与就绪检查 | `health`，见 [健康检查](health/README.md)；数据库等依赖作为 readiness 探针 |
+
+API 项目的数据库迁移需要单独维护并显式执行；启动不会自动改表。完整示例 [userService](examples/userService/README.md) 展示 MySQL、事务、鉴权、日志和文件导出，可参考依赖装配方式后接入自己的业务规则。
+
+## 配置与运行
+
+生成项目从 `etc/config.yaml` 读取配置，优先级为 **默认值 → 配置文件 → 环境变量**。密钥通过环境变量提供。手写入口需显式调用配置加载函数并传给 `omni.New(omni.WithConfig(settings))`；单独调用 `omni.New()` 不会自动读取环境变量。
+
+| 环境变量 | 用途 |
+| --- | --- |
+| `GO_OMNI_HTTP_ADDR` | 监听地址；生成项目默认 `127.0.0.1:8080` |
+| `GO_OMNI_TRANSPORT` | `nethttp`（默认）、`native`、`http2` |
+| `GO_OMNI_TLS_CERT_FILE` / `GO_OMNI_TLS_KEY_FILE` | 成对设置 TLS 证书和私钥路径 |
+| `GO_OMNI_HTTP_READ_HEADER_TIMEOUT` / `GO_OMNI_HTTP_READ_TIMEOUT` | 请求头 / 请求读取超时，如 `5s` / `30s` |
+| `GO_OMNI_HTTP_WRITE_TIMEOUT` / `GO_OMNI_HTTP_IDLE_TIMEOUT` | 响应写入 / Keep-Alive 空闲超时 |
+| `GO_OMNI_HTTP_MAX_HEADER_BYTES` | 请求头大小限制，字节数 |
+| `GO_OMNI_SHUTDOWN_TIMEOUT` | 优雅退出等待时间，默认 `10s` |
+| `GO_OMNI_ENABLE_LOGGER` / `GO_OMNI_LOG_LEVEL` | 访问日志开关、日志级别 |
+| `GO_OMNI_TRUSTED_PROXIES` | 可解析转发地址头的可信代理 IP/CIDR，逗号分隔 |
+| `GO_OMNI_DB_DSN` | 选择 MySQL 初始化时的数据库连接配置 |
+
+例如在生成项目中切换 native：
 
 ```sh
-python3 scripts/verifyBusiness.py --version v0.6.0-preview
+GO_OMNI_TRANSPORT=native go run ./cmd/server
 ```
 
-该验收会在临时目录中先固定 `v0.2.0`，再升级到 `v0.6.0-preview`，检查无本地 replace、配置加载、结构化日志、requestId、CRUD、校验错误、业务错误和优雅退出。
+手写入口可用 `omni.WithTransport(omni.TransportNative)`；TLS 配置为 `omni.WithTLS(certFile, keyFile)`。native 提供 HTTP/1.1、Keep-Alive、TLS、超时、连接/请求并发上限和对象复用；HTTP/2 是单独的实验适配器，必须配置 TLS。默认 nethttp 的 TLS 支持 HTTP/1.1 与 HTTP/2。
 
-标准库与 native 的并发、延迟和长连接内存对照见 [PERFORMANCE.md](PERFORMANCE.md)。`python3 scripts/verifyPerformance.py` 运行检查与 benchmark；增加 `--load --output /tmp/goOmniPerf.json` 可测量独立服务进程并保存报告。
+读写超时也可以在生成项目的 `etc/config.yaml` 中声明（放在 `server.http` 下）：
 
-HTTP/2 仍是显式 opt-in 实验适配器，不会改变 native 的 HTTP/1.1 默认路径。Linux TLS 长测使用 `python3 scripts/verifyHTTP2.py --duration 30m`，默认使用普通 Go 运行模式；`--race` 默认改为 60 秒，用于并发检查，其额外内存开销不能当成生产运行基线。
+```yaml
+server:
+  http:
+    readHeaderTimeout: 5s
+    readTimeout: 30s
+    writeTimeout: 30s
+    idleTimeout: 60s
+    maxHeaderBytes: 1048576
+```
 
-多连接混合场景使用 `python3 scripts/verifyHTTP2.py --scenario mixed --duration 30m`：8 条独立 TLS 连接，每条连接 14 个普通请求 worker、1 个慢上传 worker、1 个慢下载 worker，共 128 个 worker。上传为 256 KiB、每 4 KiB 等待 2 ms；下载为 8 MiB、每次最多读取 64 KiB 后等待 20 ms。日志分别记录三类成功数、传输字节数、每条连接的覆盖情况，以及停止并释放测试数据后两次 GC 的采样。
+代码配置使用 `omni.WithHTTPConfig(omni.HTTPConfig{ReadTimeout: 30*time.Second, WriteTimeout: 30*time.Second})`。`Run`、`RunContext`、`ServeContext` 会应用它；`NewServer` 会配置返回的标准 `http.Server`，包含可选的 Go 字段 `ErrorLog`。**正值覆盖、零值保留所选网络层的原有默认行为、负值报错**；不配置时升级行为不变。超时含义与支持范围见 [HTTP 配置](transport/README.md#http-配置v091-preview)，不要把网络 I/O 超时当成业务执行时限。
 
-该脚本默认把测试容器限制为 2 核、2 GiB 内存（禁用 swap）、256 个进程/线程，整个命令最多运行 40 分钟，中断和超时会清理本次容器。这些限制可用 `--cpus`、`--memory-mb`、`--pids-limit`、`--wall-timeout` 调整；共享服务器应先用 `--duration 60s` 短测，再逐步延长。每 15 秒输出的堆、RSS 和 FD 统计包含同一进程内的客户端与服务端。
+自研网络层通过 `RunWith(ctx, runner)` 接入监听与连接生命周期，通过 `NewWithRouter(router)` 替换路由；业务 Handler/Service 不需要导入具体适配器。细节与验收契约见 [网络适配层](transport/README.md)。
 
-Linux amd64 已完成 30 分钟、单 TLS 连接、128 个 worker 的普通模式长测：58,102,476 次请求，0 失败、0 协议错误，采样 RSS 峰值约 22.6 MiB，连接/活动请求归零且 FD 回到基线。完整采样和原始日志见 [HTTP/2 长测报告](performance/http2SoakLinux.json) 与 [原始日志](performance/http2SoakLinux.txt)，此前的 race 对照见 [短测记录](performance/http2SmokeLinux.json)。这项结果覆盖单连接复用。
+`Run` 处理 SIGINT/SIGTERM；`RunContext` 接收调用方控制的退出信号。服务先停止接收新请求，等待活跃请求完成，再清理资源；超时会取消请求并关闭连接，业务代码仍需响应 context 取消。
 
-多连接慢客户端场景也已完成 Linux amd64 的 30 分钟长测：8 条 TLS 连接、128 个 worker，53,079,128 次普通请求、106,971 次慢上传、5,588 次慢下载，共 53,191,687 次，0 失败与协议错误。采样 RSS 峰值约 116.6 MiB（包含客户端、服务端和下载缓冲）；退出后连接/请求归零，goroutine 回到 2、FD 回到 6；释放测试数据并两次 GC 后存活堆约 450 KiB，RSS 不要求立即归还操作系统。完整 120 份采样见 [混合长测报告](performance/http2MixedSoakLinux.json) 和 [原始日志](performance/http2MixedSoakLinux.txt)。连接级窗口耗尽、WINDOW_UPDATE 恢复及零窗口写阻塞的关闭回收也已有独立测试；Nginx 的 HTTP/2 回源验收结果见下方，适配器保持实验状态。
+## 日常开发与升级
 
-`python3 scripts/verifyHTTP2Proxy.py --count 3` 验证真实 Nginx 双段 TLS/h2、回源连接复用、证书拒绝、超时/取消恢复与新旧实例的 GOAWAY 排空；增加 `--race` 可运行并发检查。Linux amd64、Nginx 1.30.5 的普通与 race 模式各 3 轮均已通过。编译和测试容器顺序运行，均限制为 2 核、2 GiB；测试容器禁用外部网络，全部请求在容器内完成。使用方法、报告及当前边界见 [HTTP/2 代理回源验收](transport/http2/PROXY.md)。
-
-在框架根目录运行：
+在已生成的 API 项目目录执行：
 
 ```sh
-go run ./examples/reference
+go-omni api validate
+go-omni api inspect
+go-omni api generate --dry-run
+go-omni api generate
+go-omni api generate --check
+go test ./...
 ```
 
-默认地址为 `http://127.0.0.1:8080`。示例文档提供完整的 curl 操作流程。数据只保存在内存中，重启后清空。
+`Gen.go`、`docs/openapi.json` 和 manifest 由生成器管理，手动修改会报告冲突。Service、Repository、中间件实现、main、配置和依赖装配属于项目，重复生成保留手写内容；契约改变后仍需自行调整业务签名并通过编译。将 `.api`、生成文件和 `.goOmni/apiManifest.json` 一起提交，CI 可运行 `generate --check` 检查是否同步。
 
-框架的 `App` 也实现了标准 `http.Handler`，可以直接用于 `http.Server` 和 `httptest.NewServer`；业务路由可通过 `*omni.RouterGroup` 注册，无需导入网络库。
+升级时先安装目标版本的 CLI，再在业务 module 中 `go get` **同一版本**；API 项目随后执行上述生成与测试步骤，手写项目只需依赖升级及业务回归。`v0.9.1-preview` 的变化、迁移边界和验收记录见 [发布说明](RELEASE.md)。
 
-## 当前边界
+## 按需深入
 
-缓存、消息队列和定时任务暂时作为后续可选模块。认证层只定义 `Authenticator`、`Principal` 和路由保护中间件，具体 JWT、Session 或 OAuth 由项目实现。核心数据库层只依赖 `database/sql`，具体驱动、迁移和表结构由项目选择。
+| 需要了解 | 文档 |
+| --- | --- |
+| `.api` 类型、参数绑定、错误、鉴权和生成规则 | [API 开发指南](API.md) |
+| 公共响应体、提示优先级、独立回调协议 | [响应参考](RESPONSE.md) |
+| CLI 完整参数、本地框架开发和模块脚手架 | [CLI](cmd/go-omni/README.md) |
+| 完整 API 业务项目 | [userService](examples/userService/README.md) |
+| 手写接口分层示例 | [reference](examples/reference/README.md) |
+| 框架成熟度、历史变更 | [路线图](ROADMAP.md)、[更新记录](CHANGELOG.md) |
+| 网络性能、测试条件与适用范围 | [性能说明](PERFORMANCE.md)、[HTTP/2 验收](transport/native/HTTP2.md) |
 
-当前成熟度与后续验收标准见 [ROADMAP.md](ROADMAP.md)，版本变更见 [CHANGELOG.md](CHANGELOG.md)。
+当前版本可用于固定版本接入与业务验证，仍标记为 preview。`.api` 借鉴 go-zero 的接口开发方式，支持范围以本仓库文档为准，不是完整 goctl 语法兼容层；HTTP/2 保持实验状态，OSS/R2 云账号实网验收不属于本次发布范围。

RELEASE.md

@@ -0,0 +1,45 @@
+# v0.9.1-preview
+
+本版补齐已有项目接入的两个框架缺口：标准数据库 Connector 注入，以及应用级 HTTP 读写超时配置。TLS、数据库驱动日志、字符集/时区、迁移与业务规则继续由项目决定。
+
+## 安装与升级
+
+```sh
+go install git.yuntuo.hk/k2safe/go-omni/cmd/go-omni@v0.9.1-preview
+# 在各业务 module 中：
+go get git.yuntuo.hk/k2safe/go-omni@v0.9.1-preview
+```
+
+私有仓库使用本机 Git 凭据管理器，并将 `git.yuntuo.hk` 追加到已有 `GOPRIVATE`。CLI 和项目依赖使用同一固定版本。v0.9.0-preview 生成代码继续兼容，本次无需为了这两个入口重新生成接口。
+
+## 接入变化
+
+- 将项目已有 `sql.OpenDB(connector)` 的池创建替换为 `database.OpenConnector(ctx, connector, poolConfig)`；不要同时保留两个池。返回对象可用于 Health/InTx；需要标准库指针时取 `.DB`。
+- 项目原有 `mysql.NewConnector`、独立 TLS、driver Logger、驱动读写时限、MySQL 版本/时区/排序规则校验继续保留，配置不进入核心框架。
+- 将原来逐项修改 `http.Server` 的读写/空闲/头大小配置放入 `omni.HTTPConfig`，通过 `WithHTTPConfig` 或 `WithConfig` 传入。Go-only `ErrorLog` 支持 nethttp。
+- 原有 `database.Open(ctx, Config)`、手动组装 `http.Server`、自定义 Runner 均可继续使用。零 HTTP 配置保留所选网络层已有默认行为；正值覆盖，负值报错。
+
+完整可复制示例：[数据库 Connector](database/README.md#connector-接入v091-preview)、[HTTP 配置及语义](transport/README.md#http-配置v091-preview)。其他迁移能力见 [迁移扩展指南](MIGRATION.md)，从项目接入开始见 [README](README.md)。
+
+## 边界
+
+独立实验性 `TransportHTTP2` 本次支持 IdleTimeout/MaxHeaderBytes 的配置透传，但不支持读头、读请求和写响应超时，设置这些正值会在监听前明确报错。native 与标准库服务器的超时含义不完全相同，详见上表；网络超时不等于 Handler 执行时间限制。`RunWith` 自定义 Runner 的配置由项目管理。
+
+Connector 必须遵守驱动 context 协议，资源所有权按标准 `database/sql` 管理。有资源的 Connector 不跨池共享；启动 Ping 失败关闭池，成功后应用负责关闭。没有把 eTax/ePay 的数据库策略写进框架，也未修改这些业务项目或宣称它们已完成迁移。
+
+## 验证入口
+
+```sh
+GO_OMNI_SCAFFOLD_INTEGRATION=1 go test -race -p=1 -count=1 -timeout=300s ./...
+go vet ./...
+go build ./...
+python3 scripts/verifyConnector.py --local --report performance/connectorLocal.json
+python3 scripts/verifyConnector.py --version v0.9.1-preview --report performance/connectorRemote.json
+python3 scripts/verifyCompatibilityRelease.py --version v0.9.1-preview --report performance/connectorCompatibilityRemote.json
+```
+
+Connector 脚本只使用本地独立 MySQL 8.4 容器，限制 1 CPU、768 MiB、128 PID，生成一次性 CA/证书及凭据，结束清理自己的容器/卷/临时文件。测试验证正确 TLS、错误 CA/主机名拒绝、每池时区/日志配置隔离、事务、关闭与失败回收。HTTP 测试使用回环地址验证慢头、慢 body、空闲连接、流式写背压及请求头上限。常规单测不依赖 Docker，显式脚本要求真实 TLS 测试通过，不能跳过。
+
+历史发布及验收记录保留在 [CHANGELOG](CHANGELOG.md)、[v0.9.0 接入验收](performance/compatibilityAcceptance.md)。
+
+全量 race（40 个测试包）、静态检查、构建及本地隔离验收已通过，详见 [验收记录](performance/connectorAcceptance.md)。

RESPONSE.md

@@ -0,0 +1,140 @@
+# 公共响应体与独立接口协议
+
+这些功能从 `v0.8.0-preview` 提供。CLI 与项目框架依赖请固定到同一版本；源码开发可显式使用 `--framework-dir`。`v0.7.0-preview.1` 不包含响应模板声明。
+
+go-omni 的响应编码由应用或接口配置。没有配置时保留旧版默认值；业务可以定义自己的字段、嵌套结构、错误码类型、提示和空值行为。`response.Response` 仅保留为兼容 DTO，运行时与生成器不再通过它固定响应结构。
+
+## 在 .api 中定义一次、到处引用
+
+```go
+response CommonResponse (
+ body: {
+  "code": "${code}",
+  "msg": "${message}",
+  "data": "${data}"
+ }
+ codeType: int32
+ successCode: 200
+ errorCode: 9999
+ successMessage: "操作成功"
+ dataMode: always
+ codes: {"USER_NOT_FOUND":404001}
+ messages: {"USER_NOT_FOUND":"用户不存在"}
+)
+
+@server (
+ group: user
+ response: CommonResponse
+)
+service user-api {
+ @handler getUser
+ get /users/:userId (GetUserReq) returns (UserResp)
+
+ @response raw
+ @handler rawUser
+ get /rawUsers/:userId (GetUserReq) returns (UserResp)
+}
+```
+
+请求/业务返回类型照常在 `type` 中定义。上例 `UserResp` 是业务数据，由模板中的 `${data}` 放入公共体。请求失败时，同一模板输出映射后的业务错误。错误本身的 HTTP 状态保持不变，业务 `code` 与 HTTP 状态相互独立。
+
+- 公共声明可以放进 `common.api`，其他契约通过 `import "common.api"` 复用。
+- `@server (response: CommonResponse)` 指定整个 service 块的公共体；不同块可以引用同一个模板。
+- `@response PartnerResponse` 为单接口替换模板，成功和错误一起生效。
+- `@response raw` 让成功 JSON 直接返回业务对象，错误沿用组级模板；组本身为 raw 时，错误使用默认模板。
+- 模板名使用 UpperCamelCase；未知模板、未知配置、错误的占位符和冲突设置在生成前报错。
+
+**生成接口以 `.api` 为响应契约来源。** 生成器把选定模板编译进 `internal/handler/responseGen.go`，在全局鉴权、限流等应用中间件之前选定，然后再执行路由中间件和业务。OpenAPI 与运行时共用配置和映射规则。即使 `.api` 没有声明模板，生成接口也明确使用默认契约，不会被应用的 YAML 设置静默改变。
+
+业务只需返回业务数据或业务错误，无需每个 Handler 手工组装公共体。生成器维护模板、路由及文档文件，重复生成不覆盖手写 Service、Repository、middleware 和配置。
+
+## 自定义结构与占位符
+
+公共体没有规定必须出现的字段，也可以把成功和失败分开：
+
+```go
+response PartnerResponse (
+ body: {
+  "accepted": "${ok}",
+  "payload": "${data}",
+  "meta": {"trace":"${requestId}","httpStatus":"${status}"},
+  "version": 1
+ }
+ errorBody: {
+  "accepted": "${ok}",
+  "error": {"reason":"${message}","id":"${code}"}
+ }
+)
+```
+
+`body` 是 JSON 对象，可嵌套对象、数组和常量；`errorBody` 可选，需要同时定义 `body`。空对象 `{}` 也是有效模板。
+
+| 整值占位符 | 输出值 |
+| --- | --- |
+| `${data}` | 当前接口的业务返回值，保留对象/数组/数值等原类型 |
+| `${code}` | 映射后的 string / int32 / int64 业务错误码 |
+| `${message}` | 公开提示，经 message 配置映射 |
+| `${requestId}` | 请求标识；为空时省略所在对象字段 |
+| `${ok}` | 成功为 true；有错误或 HTTP 状态 ≥400 时为 false |
+| `${status}` | HTTP 状态整数 |
+
+占位符只替换整个值，不执行表达式或字符串拼接。字面量 `${data}` 写成 `$${data}`。数据为 nil 时，`dataMode: omitNil`（默认）省略所在对象字段；`always` 输出 null。数组中的占位符保留位置。模板最多嵌套 24 层。
+
+`codeType` 使用与业务字段一致的类型名，默认 `string`：
+
+| 类型 | 含义 | OpenAPI |
+| --- | --- | --- |
+| `string` | 字符串业务码，例如 `"OK"`、`"USER_NOT_FOUND"` | string |
+| `int32` | 32 位有符号整数，−2147483648 到 2147483647 | integer / int32 |
+| `int64` | 64 位有符号整数，−9223372036854775808 到 9223372036854775807 | integer / int64 |
+
+整数类型必须提供 `successCode` 和 `errorCode`，支持 0 和负数；默认码和 `codes` 映射都会校验范围，越界或小数会报错。`int64` 的配置读取和生成代码保留完整整数精度，并按 JSON 数值输出；消费端也需要支持对应的整数精度。需要文本形式时可用 `string` 并配置字符串码。
+
+旧写法 `integer` 保留兼容，沿用 ±(2^53−1) 的数值范围；新配置优先写 `int32` 或 `int64`。
+
+`codes` 按逻辑错误码覆盖默认码；`messages` 优先于 `successMessage` / `errorMessage`。未配置的公开提示沿用原错误消息；内部 cause 不会被默认编码器序列化。
+
+简单的平铺响应也可使用 `codeField` / `messageField` / `dataField` / `requestIdField` 快捷配置，`"-"` 禁用字段。空名称沿用旧默认值。这些字段名快捷配置不能和 `body` 混用，以免两个定义冲突。
+
+## 手写路由、配置文件与三方回调
+
+手写路由的应用默认配置可以放在 JSON/YAML 的 `response` 字段，也可用 Go 选项：
+
+```go
+app := omni.New(omni.WithResponse(response.Config{
+ Body: map[string]any{"code":"${code}", "msg":"${message}", "data":"${data}"},
+ CodeType: "int32", SuccessCode: 200, ErrorCode: 9999, DataMode: "always",
+}))
+```
+
+应用之间的配置独立，模板在创建时验证并复制；没有全局可变的响应格式。应用配置快照也会复制模板和映射。响应配置属于静态配置，变更后需重启。
+
+单次显式输出可使用 `c.JSON(status, value)`、`c.Text(status, text)`、`c.XML(status, value)`、`c.Bytes(status, contentType, bytes)` 或 `c.NoContent()`，都绕过公共体。已经提交的响应不会再追加错误 JSON。
+
+三方回调可能要求成功与失败都返回 HTTP 200，并分别输出 `success` / `fail`。通过接口编码器统一处理成功、错误和 panic：
+
+```go
+ack := response.EncoderFunc(func(r response.Result) (response.Payload, error) {
+ if r.Err != nil || r.Status >= 400 {
+  return response.Text(200, "fail"), nil
+ }
+ return response.Text(200, "success"), nil
+})
+app.HandleWithResponse("POST", "/hooks/payment", ack, paymentHandler)
+```
+
+编码器也可以设置 HTTP 状态、Header、XML 或任意字节。`omni.WithResponseEncoder` 设置应用默认编码器；`httpx.WithResponse` 是普通路由中间件，按中间件顺序生效。需要覆盖全局中间件提前拒绝时，应使用 `HandleWithResponse`。自定义 Registrar 可以实现 `httpx.ResponseRegistrar` 提供相同的早期挂载能力；未实现时辅助函数退化为普通路由中间件。
+
+`@response raw` 表示原始 JSON，不代表任意文本/XML协议。从 v0.9.0-preview 开始，`.api` 可用 `@handlerMode manual` 配合 `@produces` 描述文本/文件等成功输出，详见 [迁移扩展](MIGRATION.md)。自定义回调错误协议仍使用上述 Go 入口，并由应用维护相应文档；生成器不会猜测自定义 Go 编码器的输出。如果在命名中间件里替换编码器，业务也必须同步维护文档。
+
+框架内置路由的 404/405 使用应用默认格式；它们不属于某个 `.api` 分组。TLS 握手、畸形 HTTP、连接级过载等发生在进入应用前，仍按网络层协议处理。自定义编码器失败、panic 或返回非法状态/204 body 时，最终返回空 500，避免递归编码或泄露另一种响应体。
+
+## 运行示例与验证
+
+```sh
+go run ./cmd/go-omni api validate --api examples/contracts/responses.api
+go run ./cmd/go-omni api generate --api examples/contracts/responses.api \
+  --module example.com/responseDemo --framework-dir . --dir ../responseDemo
+```
+
+示例业务方法起初为 501，完成 Service 后就会套用声明的模板。参考 [完整 .api](examples/contracts/responses.api)。验收测试会在临时目录生成真实项目，写入业务方法，执行已生成路由，检查数字错误码、原始 JSON、鉴权错误、路由覆盖与重复生成保护。

ROADMAP.md

@@ -88,4 +88,18 @@
 - 已完成本地模块测试及 race 检查，Linux 全仓库 race/vet/build、生成项目 CRUD、三个 Runner 的 TLS 示例和独立 Redis/MinIO/MySQL 均通过。共享状态、重复提交、失败消息、未确认消息接管、旧确认拒绝、对象签名和迁移 dirty 阻断有对应证据，见 [扩展模块验收](performance/advancedAcceptance.md)。OSS/R2 尚无云账号实网验收。
 - 契约、使用示例与限制见 [扩展模块](ADVANCED.md)；验证入口为 `scripts/verifyModules.py --advanced`，继续限制单个测试容器 2 CPU / 2 GiB / 256 pids。
 
+## 8. API 驱动项目与真实业务示例（v0.7.0-preview）
+
+- `.api` → DTO / 绑定校验 / 路由 / Handler / Service / Repository / OpenAPI。
+- MySQL、日志与五种存储选择可组合生成；manifest 管理生成文件，保留业务文件。
+- 独立用户示例完成事务审计、鉴权、文件导出、数据库故障恢复与真实远程依赖验收。
+- 证据：[API 业务闭环](performance/apiWorkflowAcceptance.md)。
+
+## 9. 接口开发体验（v0.7.0-preview.1）
+
+- 错误目录与调用函数、401/403/409 文档、具名鉴权和运行时 hook 关联。
+- 组级继承/路由覆盖、多行接口描述、标签和弃用标记。
+- 路由总览、独立 OpenAPI 导出、生成预览与项目入口自动识别。
+- 证据：[接口开发体验验收](performance/apiDeveloperExperienceAcceptance.md)。
+
 以上阶段以验收结果判断完成。当前仍是基础框架试用阶段；MySQL、适配层契约和一次业务模块试用已完成，自研网络层已有可运行预览，稳定性与生产规模验证尚未完成。

app/app.go

@@ -15,6 +15,7 @@ import (
 	apierrors "git.yuntuo.hk/k2safe/go-omni/errors"
 	"git.yuntuo.hk/k2safe/go-omni/httpx"
 	"git.yuntuo.hk/k2safe/go-omni/middleware"
+	"git.yuntuo.hk/k2safe/go-omni/response"
 	netrouter "git.yuntuo.hk/k2safe/go-omni/transport/nethttp"
 )
 
@@ -28,6 +29,7 @@ type App struct {
 	closeOnce        sync.Once
 	closeErr         error
 	clientIPResolver *httpx.ClientIPResolver
+	responseEncoder  response.Encoder
 }
 
 // Runner is the small lifecycle boundary used by an HTTP server
@@ -64,17 +66,36 @@ func configure(options ...config.Option) config.Config {
 }
 
 func newApp(router httpx.Router, settings config.Config) *App {
+	settings.Response = settings.Response.Clone()
+	encoder, responseErr := response.New(settings.Response)
+	if responseErr != nil {
+		panic(responseErr)
+	}
+	var responseEncoder response.Encoder = encoder
+	if settings.ResponseEncoder != nil {
+		responseEncoder = settings.ResponseEncoder
+	}
 	settings.TrustedProxies = append([]string(nil), settings.TrustedProxies...)
+	settings.Log.RedactKeys = append([]string(nil), settings.Log.RedactKeys...)
 	resolver, err := httpx.NewClientIPResolver(settings.TrustedProxies...)
 	if err != nil {
 		panic("go-omni: " + err.Error())
 	}
 	middlewares := []httpx.Middleware{middleware.RequestID(settings.RequestIDHeader)}
 	if settings.EnableLogger {
-		middlewares = append(middlewares, middleware.AccessLog())
+		middlewares = append(middlewares, middleware.AccessLog(middleware.WithSlowRequestThreshold(settings.SlowRequestThreshold)))
 	}
 	middlewares = append(middlewares, middleware.Recovery())
-	return &App{router: router, config: settings, middlewares: middlewares, clientIPResolver: resolver}
+	application := &App{router: router, config: settings, middlewares: middlewares, clientIPResolver: resolver, responseEncoder: responseEncoder}
+	if fallback, ok := router.(httpx.FallbackRouter); ok {
+		adaptError := func(status int, code, message string) http.Handler {
+			return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+				application.adapt(func(*httpx.Context) error { return apierrors.New(status, code, message) }).ServeHTTP(w, r)
+			})
+		}
+		fallback.SetFallbacks(adaptError(404, "NOT_FOUND", "route not found"), adaptError(405, "METHOD_NOT_ALLOWED", "method not allowed"))
+	}
+	return application
 }
 
 // Router returns the transport contract used by this application.
@@ -92,7 +113,9 @@ func (a *App) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
 // Config returns the effective application configuration.
 func (a *App) Config() config.Config {
 	settings := a.config
+	settings.Response = settings.Response.Clone()
 	settings.TrustedProxies = append([]string(nil), settings.TrustedProxies...)
+	settings.Log.RedactKeys = append([]string(nil), settings.Log.RedactKeys...)
 	return settings
 }
 
@@ -133,16 +156,24 @@ func (a *App) Run(address ...string) error {
 	return a.RunContext(ctx, address...)
 }
 
-// NewServer creates a plain standard HTTP server around the application.
+// NewServer creates a plain standard HTTP server with the configured HTTP options.
+// Invalid HTTP options panic; RunContext/ServeContext return validation errors.
 // Use RunContext or ServeContext to apply the configured transport and TLS.
 func (a *App) NewServer(address string) *http.Server {
+	if err := a.config.HTTP.Validate(); err != nil {
+		panic(err)
+	}
 	if address == "" {
 		address = a.config.Address
 		if address == "" {
 			address = ":8080"
 		}
 	}
-	return &http.Server{Addr: address, Handler: a.router}
+	cfg := a.config.HTTP
+	return &http.Server{Addr: address, Handler: a.router,
+		ReadHeaderTimeout: cfg.ReadHeaderTimeout, ReadTimeout: cfg.ReadTimeout,
+		WriteTimeout: cfg.WriteTimeout, IdleTimeout: cfg.IdleTimeout,
+		MaxHeaderBytes: cfg.MaxHeaderBytes, ErrorLog: cfg.ErrorLog}
 }
 
 // RunContext serves until the context is canceled, then performs a graceful shutdown.
@@ -233,5 +264,5 @@ func (a *App) writeError(ctx *httpx.Context, err error) {
 	if err == nil || ctx.Responded() {
 		return
 	}
-	ctx.WriteError(apierrors.From(err))
+	ctx.WriteError(err)
 }

app/body.go

@@ -0,0 +1,32 @@
+package app
+
+import (
+	"git.yuntuo.hk/k2safe/go-omni/httpx"
+	"git.yuntuo.hk/k2safe/go-omni/response"
+	"net/http"
+)
+
+func (a *App) bodyHandler(maxBytes int64, encoder response.Encoder, handler httpx.Handler, middleware ...httpx.Middleware) http.Handler {
+	checked := httpx.LimitBody(maxBytes)(handler)
+	if encoder == nil {
+		encoder = a.responseEncoder
+	}
+	next := a.adaptResponse(encoder, checked, middleware...)
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.Body != nil {
+			r = r.WithContext(r.Context())
+			r.Body = http.MaxBytesReader(w, r.Body, maxBytes)
+		}
+		next.ServeHTTP(w, r)
+	})
+}
+
+// HandleWithBodyLimit caps the reader before application middleware and preserves
+// the response policy, including auth failures and parameter errors.
+func (a *App) HandleWithBodyLimit(method, path string, maxBytes int64, encoder response.Encoder, handler httpx.Handler, middleware ...httpx.Middleware) {
+	a.router.Handle(method, path, a.bodyHandler(maxBytes, encoder, handler, middleware...))
+}
+func (g *RouterGroup) HandleWithBodyLimit(method, path string, maxBytes int64, encoder response.Encoder, handler httpx.Handler, middleware ...httpx.Middleware) {
+	combined := append(append([]httpx.Middleware{}, g.middlewares...), middleware...)
+	g.group.Handle(method, path, g.app.bodyHandler(maxBytes, encoder, handler, combined...))
+}

app/httpConfig_test.go

@@ -0,0 +1,199 @@
+package app_test
+
+import (
+	"bufio"
+	"context"
+	"errors"
+	"io"
+	"log"
+	"net"
+	"net/http"
+	"strings"
+	"sync/atomic"
+	"testing"
+	"time"
+
+	omni "git.yuntuo.hk/k2safe/go-omni"
+)
+
+func TestHTTPConfiguredStandardServer(t *testing.T) {
+	cfg := omni.HTTPConfig{ReadHeaderTimeout: time.Second, ReadTimeout: 2 * time.Second, WriteTimeout: 3 * time.Second, IdleTimeout: 4 * time.Second, MaxHeaderBytes: 8192, ErrorLog: log.New(io.Discard, "", 0)}
+	a := omni.New(omni.WithHTTPConfig(cfg))
+	s := a.NewServer(":9000")
+	if s.ReadHeaderTimeout != cfg.ReadHeaderTimeout || s.ReadTimeout != cfg.ReadTimeout || s.WriteTimeout != cfg.WriteTimeout || s.IdleTimeout != cfg.IdleTimeout || s.MaxHeaderBytes != cfg.MaxHeaderBytes || s.ErrorLog != cfg.ErrorLog || s.Addr != ":9000" {
+		t.Fatalf("server options: %+v", s)
+	}
+	s = omni.New().NewServer("")
+	if s.ReadHeaderTimeout != 0 || s.ReadTimeout != 0 || s.WriteTimeout != 0 || s.IdleTimeout != 0 || s.MaxHeaderBytes != 0 || s.ErrorLog != nil {
+		t.Fatal("default behavior changed")
+	}
+}
+
+func TestHTTPInvalidStartupReleasesResources(t *testing.T) {
+	a := omni.New(omni.WithHTTPConfig(omni.HTTPConfig{ReadTimeout: -time.Second}))
+	called := 0
+	cleanupErr := errors.New("cleanup")
+	a.OnShutdown(func() error { called++; return cleanupErr })
+	err := a.RunContext(context.Background(), "bad address")
+	if err == nil || !strings.Contains(err.Error(), "http.readTimeout") || !errors.Is(err, cleanupErr) || called != 1 {
+		t.Fatalf("validation/cleanup: %v, %d", err, called)
+	}
+	defer func() {
+		if recover() == nil {
+			t.Error("NewServer accepted invalid config")
+		}
+	}()
+	a.NewServer("")
+}
+
+type httpConfigListener struct{ net.Listener }
+
+func (l httpConfigListener) Accept() (net.Conn, error) {
+	c, err := l.Listener.Accept()
+	if err == nil {
+		if tcp, ok := c.(*net.TCPConn); ok {
+			_ = tcp.SetWriteBuffer(32 << 10)
+		}
+	}
+	return c, err
+}
+
+func httpConfigConnection(t *testing.T, transport string, cfg omni.HTTPConfig, handler omni.Handler) net.Conn {
+	t.Helper()
+	a := omni.New(omni.WithTransport(transport), omni.WithHTTPConfig(cfg), omni.WithShutdownTimeout(time.Second))
+	a.GET("/", handler)
+	a.POST("/", handler)
+	l, err := net.Listen("tcp", "127.0.0.1:0")
+	if err != nil {
+		t.Fatal(err)
+	}
+	ctx, cancel := context.WithCancel(context.Background())
+	done := make(chan error, 1)
+	go func() { done <- a.ServeContext(ctx, httpConfigListener{l}) }()
+	t.Cleanup(func() {
+		cancel()
+		select {
+		case err := <-done:
+			if err != nil {
+				t.Errorf("server shutdown: %v", err)
+			}
+		case <-time.After(3 * time.Second):
+			t.Error("server did not stop")
+		}
+	})
+	c, err := net.DialTimeout("tcp", l.Addr().String(), time.Second)
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(func() { c.Close() })
+	_ = c.SetDeadline(time.Now().Add(3 * time.Second))
+	return c
+}
+
+func TestHTTPConfiguredNetworkLimits(t *testing.T) {
+	for _, transport := range []string{omni.TransportNetHTTP, omni.TransportNative} {
+		t.Run(transport, func(t *testing.T) {
+			empty := func(c *omni.Context) error { w := c.Raw(); w.WriteHeader(204); return nil }
+			t.Run("slowHeaders", func(t *testing.T) {
+				c := httpConfigConnection(t, transport, omni.HTTPConfig{ReadHeaderTimeout: 60 * time.Millisecond}, empty)
+				if _, err := io.WriteString(c, "GET / HTTP/1.1\r\nHost: localhost\r\nX-Incomplete:"); err != nil {
+					t.Fatal(err)
+				}
+				_, err := io.ReadAll(c)
+				if e, ok := err.(net.Error); ok && e.Timeout() {
+					t.Fatal("server read-header timeout not applied")
+				}
+			})
+			t.Run("slowBody", func(t *testing.T) {
+				var accepted atomic.Bool
+				c := httpConfigConnection(t, transport, omni.HTTPConfig{ReadTimeout: 60 * time.Millisecond}, func(c *omni.Context) error {
+					_, err := io.ReadAll(c.Request().Body)
+					accepted.Store(err == nil)
+					return nil
+				})
+				if _, err := io.WriteString(c, "POST / HTTP/1.1\r\nHost: localhost\r\nConnection: close\r\nContent-Length: 10\r\n\r\nx"); err != nil {
+					t.Fatal(err)
+				}
+				_, err := io.ReadAll(c)
+				if e, ok := err.(net.Error); ok && e.Timeout() {
+					t.Fatal("read timeout not applied")
+				}
+				if accepted.Load() {
+					t.Fatal("incomplete body accepted")
+				}
+			})
+			t.Run("idle", func(t *testing.T) {
+				c := httpConfigConnection(t, transport, omni.HTTPConfig{IdleTimeout: 60 * time.Millisecond}, empty)
+				if _, err := io.WriteString(c, "GET / HTTP/1.1\r\nHost: localhost\r\n\r\n"); err != nil {
+					t.Fatal(err)
+				}
+				r, err := http.ReadResponse(bufio.NewReader(c), nil)
+				if err != nil {
+					t.Fatal(err)
+				}
+				r.Body.Close()
+				if r.StatusCode != 204 {
+					t.Fatal(r.StatusCode)
+				}
+				_, err = c.Read(make([]byte, 1))
+				if e, ok := err.(net.Error); ok && e.Timeout() {
+					t.Fatal("idle timeout not applied")
+				}
+				if err == nil {
+					t.Fatal("idle connection not closed")
+				}
+			})
+			t.Run("writeBackpressure", func(t *testing.T) {
+				done := make(chan error, 1)
+				c := httpConfigConnection(t, transport, omni.HTTPConfig{WriteTimeout: 60 * time.Millisecond}, func(c *omni.Context) error {
+					w := c.Raw()
+					w.WriteHeader(200)
+					if err := http.NewResponseController(w).Flush(); err != nil {
+						done <- err
+						return nil
+					}
+					_, err := io.Copy(w, io.LimitReader(repeatingHTTPReader{}, 64<<20))
+					done <- err
+					return nil
+				})
+				if tcp, ok := c.(*net.TCPConn); ok {
+					_ = tcp.SetReadBuffer(1024)
+				}
+				if _, err := io.WriteString(c, "GET / HTTP/1.1\r\nHost: localhost\r\n\r\n"); err != nil {
+					t.Fatal(err)
+				}
+				select {
+				case err := <-done:
+					if err == nil {
+						t.Fatal("write unexpectedly completed")
+					}
+				case <-time.After(2 * time.Second):
+					t.Fatal("write timeout not applied")
+				}
+			})
+			t.Run("headerLimit", func(t *testing.T) {
+				c := httpConfigConnection(t, transport, omni.HTTPConfig{MaxHeaderBytes: 1024}, empty)
+				if _, err := io.WriteString(c, "GET / HTTP/1.1\r\nHost: localhost\r\nX-Large: "+strings.Repeat("a", 8192)+"\r\n\r\n"); err != nil {
+					t.Fatal(err)
+				}
+				r, err := http.ReadResponse(bufio.NewReader(c), nil)
+				if err != nil {
+					t.Fatal(err)
+				}
+				r.Body.Close()
+				if r.StatusCode != 431 {
+					t.Fatalf("oversized header status: %d", r.StatusCode)
+				}
+			})
+		})
+	}
+}
+
+type repeatingHTTPReader struct{}
+
+func (repeatingHTTPReader) Read(b []byte) (int, error) {
+	for i := range b {
+		b[i] = 'x'
+	}
+	return len(b), nil
+}

app/router.go

@@ -4,6 +4,7 @@ import (
 	"net/http"
 
 	"git.yuntuo.hk/k2safe/go-omni/httpx"
+	"git.yuntuo.hk/k2safe/go-omni/response"
 )
 
 func (a *App) handle(routes httpx.RouterGroup, method, path string, handler httpx.Handler, middleware []httpx.Middleware) {
@@ -11,6 +12,10 @@ func (a *App) handle(routes httpx.RouterGroup, method, path string, handler http
 }
 
 func (a *App) adapt(handler httpx.Handler, middleware ...httpx.Middleware) http.Handler {
+	return a.adaptResponse(a.responseEncoder, handler, middleware...)
+}
+
+func (a *App) adaptResponse(encoder response.Encoder, handler httpx.Handler, middleware ...httpx.Middleware) http.Handler {
 	wrapped := handler
 	all := make([]httpx.Middleware, 0, len(a.middlewares)+len(middleware))
 	all = append(all, a.middlewares...)
@@ -25,6 +30,8 @@ func (a *App) adapt(handler httpx.Handler, middleware ...httpx.Middleware) http.
 			request = request.WithContext(httpx.WithClientIPResolver(request.Context(), a.clientIPResolver))
 		}
 		requestContext := httpx.NewContext(request, writer, httpx.RouteParams(request.Context()))
+		requestContext.SetResponseEncoder(encoder)
+		defer func() { httpx.CleanupMultipart(requestContext.Request()) }()
 		if err := wrapped(requestContext); err != nil {
 			a.writeError(requestContext, err)
 		}
@@ -37,6 +44,14 @@ func (a *App) Handle(method, path string, handler httpx.Handler, middleware ...h
 	a.handle(a.router, method, path, handler, middleware)
 }
 
+// HandleWithResponse selects the route policy before all application middleware.
+func (a *App) HandleWithResponse(method, path string, encoder response.Encoder, handler httpx.Handler, middleware ...httpx.Middleware) {
+	if encoder == nil {
+		encoder = a.responseEncoder
+	}
+	a.router.Handle(method, path, a.adaptResponse(encoder, handler, middleware...))
+}
+
 func (a *App) GET(path string, handler httpx.Handler, middleware ...httpx.Middleware) {
 	a.handle(a.router, http.MethodGet, path, handler, middleware)
 }
@@ -94,6 +109,15 @@ func (g *RouterGroup) Handle(method, path string, handler httpx.Handler, middlew
 	g.route(method, path, handler, middleware)
 }
 
+func (g *RouterGroup) HandleWithResponse(method, path string, encoder response.Encoder, handler httpx.Handler, middleware ...httpx.Middleware) {
+	if encoder == nil {
+		encoder = g.app.responseEncoder
+	}
+	combined := append([]httpx.Middleware{}, g.middlewares...)
+	combined = append(combined, middleware...)
+	g.group.Handle(method, path, g.app.adaptResponse(encoder, handler, combined...))
+}
+
 func (g *RouterGroup) GET(path string, handler httpx.Handler, middleware ...httpx.Middleware) {
 	g.route(http.MethodGet, path, handler, middleware)
 }

app/transport.go

@@ -57,6 +57,22 @@ func (a *App) prepareTransport() (func(context.Context, net.Listener) error, err
 	case config.TransportNative:
 		server := native.New(a)
 		server.ShutdownTimeout = shutdownTimeout
+		cfg := a.config.HTTP
+		if cfg.ReadHeaderTimeout > 0 {
+			server.ReadHeaderTimeout = cfg.ReadHeaderTimeout
+		}
+		if cfg.ReadTimeout > 0 {
+			server.ReadTimeout = cfg.ReadTimeout
+		}
+		if cfg.WriteTimeout > 0 {
+			server.WriteTimeout = cfg.WriteTimeout
+		}
+		if cfg.IdleTimeout > 0 {
+			server.IdleTimeout = cfg.IdleTimeout
+		}
+		if cfg.MaxHeaderBytes > 0 {
+			server.MaxHeaderBytes = cfg.MaxHeaderBytes
+		}
 		if tlsConfig != nil {
 			return func(ctx context.Context, listener net.Listener) error {
 				return server.ServeTLS(ctx, listener, tlsConfig)
@@ -66,6 +82,12 @@ func (a *App) prepareTransport() (func(context.Context, net.Listener) error, err
 	case config.TransportHTTP2:
 		server := h2transport.New(a)
 		server.ShutdownTimeout = shutdownTimeout
+		if a.config.HTTP.IdleTimeout > 0 {
+			server.IdleTimeout = a.config.HTTP.IdleTimeout
+		}
+		if a.config.HTTP.MaxHeaderBytes > 0 {
+			server.MaxHeaderBytes = a.config.HTTP.MaxHeaderBytes
+		}
 		return func(ctx context.Context, listener net.Listener) error {
 			return server.ServeTLS(ctx, listener, tlsConfig)
 		}, nil

cmd/go-omni/README.md

@@ -1,17 +1,82 @@
 # go-omni CLI
 
+首次接入见 [README](../../README.md)，无需克隆框架源码。本页说明命令参数；下方 `go run ./cmd/go-omni` 示例在框架仓库中执行，并显式引用本地源码。
+
+## API 契约驱动项目
+
+```sh
+# 创建包含可运行问候接口的新项目
+go run ./cmd/go-omni api new --module example.com/demo --framework-dir . ../demo
+
+# 从已有定义生成对应目录、类型、路由和业务骨架
+go run ./cmd/go-omni api generate --api examples/contracts/user.api \
+  --dir ../userService --module example.com/userService --framework-dir .
+
+# 校验定义；也接受 goctl 风格的 api go -api ... -dir ...
+go run ./cmd/go-omni api validate --api examples/contracts/user.api
+```
+
+`new --api <file>` 是契约项目的另一个入口。可以组合 `--database mysql --storage local --log-output file`，生成配置、依赖初始化与资源关闭。API 默认无数据库、无对象存储；`--database memory` 等同于不打开连接。`--force` 不允许覆盖 API 项目。初始配置选择写入 manifest，重新生成自动沿用。
+
+后续在生成项目内执行 `go-omni api generate --api api/user.api --dir .`。
+项目内可省略 `--api` / `--dir`。`api inspect` 展示路由和鉴权/业务错误，`api export` 向 stdout 导出 OpenAPI，`api generate --dry-run` 预览文件变化。`--check` 只读检查生成产物是否过期。生成器记录所有权，保留 Service / Repository / 配置 / main 的手写内容，遇到生成文件被手动修改则报冲突。新 Service 与中间件占位实现返回 501。支持 `error (...)`、具名 `auth`、路由 `@errors` / `@auth` 和多行 `@doc`；错误目录同步生成 `internal/apierrors` 调用函数。
+
+支持范围、参数语义、目录及安全更新策略见 [API 开发指南](../../API.md)。本版借鉴 go-zero 的工作流，不宣称兼容全部 goctl 语法；仍通过 Omni/httpx 保留网络层替换能力。
+
+## 日志与对象存储按需装配
+
+新增 `--log-output stdout|stderr|file`、`--log-format json|text`、`--storage none|local|s3|r2|oss`。
+指定任意一个新选项后，生成严格的配置文件、初始化代码和项目自身的测试；不指定则保留原有轻量骨架。
+对象存储独立于 `--database memory|mysql`。只有选择文件存储才会生成文件 Handler / Service 和对应适配器。
+
+开发阶段可以使用本地源码；固定远程版本的安装和验收见 [发布说明](../../RELEASE.md)：
+
+```sh
+# 在 go-omni 仓库中运行；目标目录须为空。
+go run ./cmd/go-omni new --framework-dir . \
+  --module example.com/fileService --log-output file --log-format json \
+  --storage local ../fileService
+```
+
+生成项目包含 `etc/config.yaml`、`internal/settings`、`internal/servicecontext/storage.go`、
+文件 Service/Handler、测试和 `MODULES.md`。按生成的 MODULES.md 配置示例 Token 和本地签名密钥后，
+`go mod tidy && go run ./cmd/server` 即可体验。云存储分别选择 `--storage s3`、`r2`、`oss`，
+再设置已有桶/凭据等环境变量；不自动创建桶或修改云资源。
+
+配置优先级为默认值 → YAML/JSON → 环境变量；密钥仅允许环境变量。Service 依赖统一存储接口，
+组合处负责创建客户端与有界连接池，退出时关闭自己创建的资源。文件接口提供服务端上传、直传签名、
+临时下载链接及统一错误处理；日志示例携带 requestId，文件输出默认带轮转。没有固定业务身份上下文。
+
+新模板要求 `v0.7.0-preview` 或更新版本；明确指定旧版本并启用新模块会被拒绝，
+避免模板引用旧框架不存在的接口。本地 `--framework-dir` 验证不受此限制。`--force` 可重新生成兼容配置，
+但如果切换配置会遗留引用已移除依赖的旧文件，则拒绝操作，要求使用新目录；不会自动删除修改过的代码。
+
+验证当前生成器：
+
+```sh
+GO_OMNI_SCAFFOLD_INTEGRATION=1 go test -race ./cmd/go-omni/...
+python3 scripts/verifyScaffoldModules.py
+```
+
+前者覆盖两种数据库与五种文件存储选择、日志方式/格式，以及生成项目的配置、资源关闭和接口测试。
+后者实际编译启动服务，验证日志、上传/下载/直传链接、错误状态、nethttp/native 下的 SIGINT/SIGTERM 和监听端口释放。
+云端选项的测试使用本地替身，不代表 OSS/R2 实网验收；本批不访问业务服务器。报告见
+[脚手架模块验收](../../performance/scaffoldModulesLocal.json)。
+
+## 其他命令与远程安装
+
 main 分支还提供 `go-omni add orderItems --dir /path/to/project`，向已有 GoOmni 项目增加
 Handler / Service / Repository / Model 与模块注册入口。模块名为 lowerCamelCase，
 目标目录存在时拒绝覆盖，已有启动代码保持原样。生成模块带可替换的内存 CRUD Repository，
 导入后使用 `orderItems.Register(application, repository, authMiddleware)` 注册。
-该命令尚未包含在下方历史标签中；当前源码可用 `go build -o /tmp/go-omni ./cmd/go-omni` 构建。
+该命令从 `v0.7.0-preview` 提供；源码可用 `go build -o /tmp/go-omni ./cmd/go-omni` 构建。
 边界和验证方式见 [业务基础模块](../../MODULES.md)。
 
 从远程安装，生成一个带 Handler / Service / Repository / Model 分层的服务骨架：
 
 ```sh
-go install git.yuntuo.hk/k2safe/go-omni/cmd/go-omni@v0.6.0-preview
-go-omni new --module example.com/billing ./billing
+GOPRIVATE=git.yuntuo.hk go install git.yuntuo.hk/k2safe/go-omni/cmd/go-omni@v0.9.1-preview
+go-omni new --framework-version v0.9.1-preview --module example.com/billing ./billing
 cd billing
 go mod tidy
 go run ./cmd/server

cmd/go-omni/api.go

@@ -0,0 +1,176 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"strings"
+	"text/tabwriter"
+
+	"git.yuntuo.hk/k2safe/go-omni/cmd/go-omni/apigen"
+)
+
+func runAPI(args []string) error {
+	if len(args) == 0 || args[0] == "help" || args[0] == "--help" || args[0] == "-h" {
+		usage()
+		return nil
+	}
+	command := args[0]
+	if command == "go" {
+		command = "generate"
+	}
+	if command == "check" {
+		command = "validate"
+	}
+	if command != "new" && command != "generate" && command != "validate" && command != "inspect" && command != "export" {
+		return fmt.Errorf("unknown api command %q", command)
+	}
+	readOnly := command == "validate" || command == "inspect" || command == "export"
+	o := apigen.Options{}
+	for i := 1; i < len(args); i++ {
+		arg := args[i]
+		if arg == "--help" || arg == "-h" {
+			usage()
+			return nil
+		}
+		if arg == "--check" || arg == "--dry-run" {
+			if command != "generate" {
+				return fmt.Errorf("%s belongs to api generate", arg)
+			}
+			if arg == "--check" {
+				o.Check = true
+			} else {
+				o.DryRun = true
+			}
+			continue
+		}
+		if !strings.HasPrefix(arg, "-") {
+			if command == "new" && o.Dir == "" {
+				o.Dir = arg
+				continue
+			}
+			return fmt.Errorf("unexpected argument %q", arg)
+		}
+		name, value, inline := strings.Cut(arg, "=")
+		// goctl-style -api/-dir aliases ease migration; long forms are canonical.
+		if name == "-api" {
+			name = "--api"
+		}
+		if name == "-dir" {
+			name = "--dir"
+		}
+		switch name {
+		case "--api", "--dir", "--module", "--framework-dir", "--framework-version", "--log-output", "--log-format", "--database", "--storage":
+		default:
+			return fmt.Errorf("unknown api option %q", name)
+		}
+		if !inline {
+			if i+1 >= len(args) || strings.HasPrefix(args[i+1], "-") {
+				return fmt.Errorf("%s requires a value", name)
+			}
+			i++
+			value = args[i]
+		}
+		if strings.TrimSpace(value) == "" {
+			return fmt.Errorf("%s requires a value", name)
+		}
+		if readOnly && name != "--api" {
+			return fmt.Errorf("api %s does not accept %s", command, name)
+		}
+		switch name {
+		case "--api":
+			o.API = value
+		case "--dir":
+			o.Dir = value
+		case "--module":
+			o.Module = value
+		case "--framework-dir":
+			o.FrameworkDir = value
+		case "--framework-version":
+			o.FrameworkVersion = value
+		case "--database":
+			o.Database = value
+		case "--storage":
+			o.Storage = value
+		case "--log-output":
+			o.LogOutput = value
+		case "--log-format":
+			o.LogFormat = value
+		}
+	}
+	if command != "new" && o.API == "" {
+		dir := o.Dir
+		if dir == "" {
+			dir = "."
+		}
+		var err error
+		o.API, err = apigen.ProjectEntry(dir)
+		if err != nil {
+			return err
+		}
+	}
+	if readOnly {
+		spec, err := apigen.Parse(o.API)
+		if err != nil {
+			return err
+		}
+		compiled, err := apigen.Compile(spec)
+		if err != nil {
+			return err
+		}
+		switch command {
+		case "validate":
+			fmt.Printf("valid API: %d types, %d routes, %d errors, %d auth schemes\n", len(spec.Types), len(spec.Routes), len(spec.Errors), len(spec.Auth))
+		case "export":
+			fmt.Println(string(compiled.Document))
+		case "inspect":
+			writer := tabwriter.NewWriter(os.Stdout, 0, 4, 2, ' ', 0)
+			fmt.Fprintln(writer, "METHOD\tPATH\tHANDLER\tAUTH\tRESPONSE\tERRORS")
+			definitions := map[string]apigen.ErrorDefinition{}
+			for _, e := range spec.Errors {
+				definitions[e.Name] = e
+			}
+			for _, r := range compiled.Spec.Routes {
+				auth := r.Auth
+				if auth == "" {
+					auth = "(undeclared)"
+				}
+				var errs []string
+				for _, name := range r.Errors {
+					e := definitions[name]
+					errs = append(errs, fmt.Sprintf("%d:%s", e.Status, e.Code))
+				}
+				format := r.ResponseFormat
+				if format == "" {
+					format = "default"
+				}
+				fmt.Fprintf(writer, "%s\t%s\t%s/%s\t%s\t%s\t%s\n", strings.ToUpper(r.Method), r.Path, r.Group, r.Handler, auth, format, strings.Join(errs, ", "))
+			}
+			return writer.Flush()
+		}
+		return nil
+	}
+	var out apigen.Output
+	var err error
+	if command == "new" {
+		out, err = apigen.New(o)
+	} else {
+		if o.Dir == "" {
+			o.Dir = "."
+		}
+		out, err = apigen.Generate(o)
+	}
+	if err != nil {
+		return err
+	}
+	if o.DryRun {
+		for _, change := range out.Changes {
+			fmt.Printf("%-7s %s\n", change.Action, change.Path)
+		}
+		fmt.Printf("Preview: %d changes; %d existing developer-owned files preserved; no files written\n", len(out.Changes), len(out.Preserved))
+	} else if o.Check {
+		fmt.Println("API generated files are current")
+	} else {
+		fmt.Printf("API project ready: %d generated, %d created, %d preserved, %d removed\n", len(out.Generated), len(out.Created), len(out.Preserved), len(out.Removed))
+	}
+	return nil
+}

cmd/go-omni/api_test.go

@@ -0,0 +1,107 @@
+package main
+
+import (
+	"encoding/json"
+	"io"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+func TestAPICommands(t *testing.T) {
+	root, err := filepath.Abs("../..")
+	if err != nil {
+		t.Fatal(err)
+	}
+	project := filepath.Join(t.TempDir(), "demo")
+	if err = runAPI([]string{"new", project, "--module=example.com/demo", "--framework-dir", root}); err != nil {
+		t.Fatal(err)
+	}
+	api := filepath.Join(project, "api/service.api")
+	if err = runAPI([]string{"validate", "-api", api}); err != nil {
+		t.Fatal(err)
+	}
+	if err = runAPI([]string{"go", "-api", api, "-dir", project, "--check"}); err != nil {
+		t.Fatal(err)
+	}
+	if err = runNew([]string{"--force", project}); err == nil {
+		t.Fatal("CRUD starter overwrote API project")
+	}
+	target := filepath.Join(t.TempDir(), "other")
+	if err = runNew([]string{"--api", api, "--module", "example.com/other", "--framework-dir", root, target}); err != nil {
+		t.Fatal(err)
+	}
+	if _, err = os.Stat(filepath.Join(target, "internal/service/greet/greet.go")); err != nil {
+		t.Fatal(err)
+	}
+	for _, args := range [][]string{{"validate"}, {"generate", "--api"}, {"new", "--api=x", "somewhere"}, {"generate", "--dir="}, {"generate", "--force"}, {"validate", "--api", api, "--dir", project}, {"validate", "--check"}} {
+		if err = runAPI(args); err == nil {
+			t.Fatalf("invalid args accepted: %v", args)
+		}
+	}
+	if err = runNew([]string{"--api", api, "--force", target}); err == nil || !strings.Contains(err.Error(), "does not accept --force") {
+		t.Fatalf("incompatible profile: %v", err)
+	}
+}
+
+func TestAPIDeveloperCommands(t *testing.T) {
+	root, err := filepath.Abs("../..")
+	if err != nil {
+		t.Fatal(err)
+	}
+	dir := filepath.Join(t.TempDir(), "project")
+	if err = runAPI([]string{"new", dir, "--framework-dir", root, "--module", "example.com/commands"}); err != nil {
+		t.Fatal(err)
+	}
+	// Generation can resolve the entry from an explicit target directory.
+	if err = runAPI([]string{"generate", "--dir", dir, "--dry-run"}); err != nil {
+		t.Fatal(err)
+	}
+	wd, err := os.Getwd()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err = os.Chdir(dir); err != nil {
+		t.Fatal(err)
+	}
+	defer os.Chdir(wd)
+	for _, args := range [][]string{{"validate"}, {"inspect"}, {"generate", "--check"}} {
+		if err = runAPI(args); err != nil {
+			t.Fatalf("%v: %v", args, err)
+		}
+	}
+	doc := captureAPIOutput(t, []string{"export"})
+	var parsed map[string]any
+	if err = json.Unmarshal([]byte(doc), &parsed); err != nil {
+		t.Fatalf("export must be pure JSON: %v", err)
+	}
+	if parsed["openapi"] != "3.0.3" {
+		t.Fatal("wrong export")
+	}
+	for _, args := range [][]string{{"generate", "--dry-run", "--check"}, {"new", "--dry-run", "other"}, {"inspect", "--dir", dir}, {"export", "--log-output", "file"}} {
+		if err = runAPI(args); err == nil {
+			t.Fatalf("accepted invalid flags: %v", args)
+		}
+	}
+}
+func captureAPIOutput(t *testing.T, args []string) string {
+	t.Helper()
+	r, w, err := os.Pipe()
+	if err != nil {
+		t.Fatal(err)
+	}
+	previous := os.Stdout
+	os.Stdout = w
+	defer func() { os.Stdout = previous; r.Close(); w.Close() }()
+	result := make(chan []byte, 1)
+	go func() { data, _ := io.ReadAll(r); result <- data }()
+	callErr := runAPI(args)
+	w.Close()
+	os.Stdout = previous
+	data := <-result
+	if callErr != nil {
+		t.Fatal(callErr)
+	}
+	return string(data)
+}

cmd/go-omni/apigen/apigen_test.go

@@ -0,0 +1,360 @@
+package apigen
+
+import (
+	"context"
+	"encoding/json"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+	"testing"
+	"time"
+)
+
+func frameworkRoot(t *testing.T) string {
+	t.Helper()
+	p, err := filepath.Abs("../../..")
+	if err != nil {
+		t.Fatal(err)
+	}
+	return p
+}
+func writeFile(t *testing.T, name, body string) {
+	t.Helper()
+	if err := os.MkdirAll(filepath.Dir(name), 0755); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.WriteFile(name, []byte(body), 0644); err != nil {
+		t.Fatal(err)
+	}
+}
+func readFile(t *testing.T, name string) string {
+	t.Helper()
+	b, err := os.ReadFile(name)
+	if err != nil {
+		t.Fatal(err)
+	}
+	return string(b)
+}
+func parseText(t *testing.T, source string) (*Spec, error) {
+	t.Helper()
+	file := filepath.Join(t.TempDir(), "service.api")
+	writeFile(t, file, source)
+	return Parse(file)
+}
+
+func TestCompileExample(t *testing.T) {
+	s, err := Parse(filepath.Join(frameworkRoot(t), "examples/contracts/user.api"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	c, err := Compile(s)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(c.Groups) != 2 || len(s.Routes) != 3 || len(s.Sources) != 2 {
+		t.Fatalf("wrong spec: %+v", s)
+	}
+	var doc map[string]any
+	if err = json.Unmarshal(c.Document, &doc); err != nil {
+		t.Fatal(err)
+	}
+	route := doc["paths"].(map[string]any)["/api/v1/users/{userId}"].(map[string]any)["put"].(map[string]any)
+	if len(route["parameters"].([]any)) != 3 {
+		t.Fatal("missing mixed parameters")
+	}
+	schema := route["requestBody"].(map[string]any)["content"].(map[string]any)["application/json"].(map[string]any)["schema"].(map[string]any)
+	if schema["additionalProperties"] != false || len(schema["required"].([]any)) != 2 {
+		t.Fatalf("wrong body schema: %+v", schema)
+	}
+	if strings.Contains(string(c.Document), `"user_id"`) {
+		t.Fatal("snake case wire name")
+	}
+}
+func TestInvalidDefinitions(t *testing.T) {
+	cases := []string{
+		`syntax="v2"`,
+		`@server ( jwt: Auth ) service user { @handler go get /go }`,
+		"type Request { Name string `json:\"name\" binding:\"typo\"` }\nservice user { @handler run\n post /go (Request) }",
+		"type A { Other *A `json:\"other,optional\"` }\nservice user { @handler run\n post /go (A) }",
+		"type A { Other Missing `json:\"other\"` }\nservice user { @handler run\n post /go (A) }",
+		"type A { UserID int `json:\"user_id\"` }\nservice user { @handler run\n post /go (A) }",
+		"service user { @handler go\n get /go\n @handler other\n get /go\n}",
+		"service user { @handler go\n get /:id\n}",
+		"service user { @handler service\n get /go\n}",
+		"type A { ID int `path:\"id\"` }\nservice user { @handler go\n get /go (A)\n}",
+		"type A { Name string `json:\"name\"` }\nservice user { @handler go\n get /go (A)\n}",
+		"service user { @handler go\n @status 201\n post /go\n}",
+		"type A { Name string `header:\"Name\"` }\nservice user { @handler go\n get /go returns (A)\n}",
+		"@server (group: ../../bad)\nservice user { @handler go\n get /go\n}",
+		"service user { @handler go\n get /health/ready\n}",
+		"type A { Name string `json:\"name\"`\n Name int `json:\"other\"` }\nservice user { @handler go\n post /go (A)\n}",
+		"service user { @handler go\n get /go\n @handler Go\n get /other\n}",
+		"type A { Value []byte `json:\"value\"` }\nservice user { @handler go\n post /go (A)\n}",
+	}
+	for i, source := range cases {
+		s, err := parseText(t, source)
+		if err == nil {
+			_, err = Compile(s)
+		}
+		if err == nil {
+			t.Fatalf("case %d accepted: %s", i, source)
+		}
+	}
+}
+func TestImports(t *testing.T) {
+	root := t.TempDir()
+	entry := filepath.Join(root, "api", "entry.api")
+	writeFile(t, entry, "import \"types.api\"\nservice user { @handler ping\n get /ping\n}")
+	writeFile(t, filepath.Join(root, "api/types.api"), `import "entry.api"`)
+	if _, err := Parse(entry); err == nil || !strings.Contains(err.Error(), "circular") {
+		t.Fatalf("cycle: %v", err)
+	}
+	writeFile(t, entry, "import \"../outside.api\"\nservice user { @handler ping\n get /ping\n}")
+	writeFile(t, filepath.Join(root, "outside.api"), `type X { Value string `+"`json:\"value\"`"+` }`)
+	if _, err := Parse(entry); err == nil {
+		t.Fatal("escaped import root")
+	}
+	writeFile(t, entry, "import (\n \"shared.api\"\n \"./shared.api\"\n)\nservice user { @handler ping\n get /ping\n}")
+	writeFile(t, filepath.Join(root, "api/shared.api"), `type X { Value string `+"`json:\"value\"`"+` }`)
+	s, err := Parse(entry)
+	if err != nil || len(s.Types) != 1 {
+		t.Fatalf("duplicate import: %+v %v", s, err)
+	}
+}
+
+func TestSharedPrefixConflict(t *testing.T) {
+	source := "type A { ID int `path:\"id\"` }\ntype B { Name string `path:\"name\"` }\nservice user {\n @handler first\n get /users/:id (A)\n @handler second\n get /users/:name/items (B)\n}"
+	s, err := parseText(t, source)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if _, err = Compile(s); err == nil {
+		t.Fatal("shared prefix conflict was accepted")
+	}
+}
+
+func FuzzParser(f *testing.F) {
+	for _, s := range []string{starterAPI, declaredAPI, "error Broken", "auth Auth (type: bearer)", "syntax = \"v1\"", "type (", "@server (prefix: /api)"} {
+		f.Add(s)
+	}
+	f.Fuzz(func(t *testing.T, source string) {
+		if len(source) > 16384 {
+			t.Skip()
+		}
+		tokens, err := lex("fuzz.api", source)
+		if err != nil {
+			return
+		}
+		spec := &Spec{Title: "Fuzz", Version: "1"}
+		p := parser{tokens: tokens, spec: spec}
+		if p.parse() == nil {
+			_, _ = Compile(spec)
+		}
+	})
+}
+func TestRegenerationAndConflicts(t *testing.T) {
+	dir := filepath.Join(t.TempDir(), "app")
+	if _, err := New(Options{Dir: dir, Module: "example.com/test", FrameworkDir: frameworkRoot(t)}); err != nil {
+		t.Fatal(err)
+	}
+	o := Options{Dir: dir, API: filepath.Join(dir, "api/service.api")}
+	if _, err := Generate(o); err != nil {
+		t.Fatal(err)
+	}
+	manifestBefore := readFile(t, filepath.Join(dir, manifestPath))
+	typesBefore := readFile(t, filepath.Join(dir, "internal/types/typesGen.go"))
+	o.Check = true
+	if _, err := Generate(o); err != nil {
+		t.Fatal(err)
+	}
+	servicePath := filepath.Join(dir, "internal/service/greet/greet.go")
+	service := readFile(t, servicePath) + "\n// user edit must survive\n"
+	writeFile(t, servicePath, service)
+	for _, file := range []string{"cmd/server/main.go", "etc/config.yaml", "internal/servicecontext/context.go", "internal/repository/greet/repository.go"} {
+		body := readFile(t, filepath.Join(dir, file))
+		if strings.HasSuffix(file, ".go") {
+			body += "\n// handwritten extension\n"
+		} else {
+			body += "\n# handwritten extension\n"
+		}
+		writeFile(t, filepath.Join(dir, file), body)
+	}
+	api := readFile(t, o.API)
+	api += "\n@server (group: extra)\nservice greet-api {\n @handler ping\n get /ping\n}\n"
+	writeFile(t, o.API, api)
+	if _, err := Generate(o); err == nil {
+		t.Fatal("check accepted stale output")
+	}
+	if readFile(t, filepath.Join(dir, manifestPath)) != manifestBefore {
+		t.Fatal("--check wrote manifest")
+	}
+	o.Check = false
+	if _, err := Generate(o); err != nil {
+		t.Fatal(err)
+	}
+	if readFile(t, servicePath) != service {
+		t.Fatal("business code overwritten")
+	}
+	// Retiring a group removes only owned handlers, keeping its business files.
+	writeFile(t, o.API, strings.Split(api, "\n@server (group: extra)")[0])
+	if _, err := Generate(o); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := os.Stat(filepath.Join(dir, "internal/handler/extra/handlersGen.go")); !os.IsNotExist(err) {
+		t.Fatal("stale handler remains")
+	}
+	if _, err := os.Stat(filepath.Join(dir, "internal/service/extra/ping.go")); err != nil {
+		t.Fatal("business stub removed")
+	}
+	writeFile(t, filepath.Join(dir, "internal/types/typesGen.go"), typesBefore+"\n// edited generated file\n")
+	before := snapshot(t, dir)
+	if _, err := Generate(o); err == nil || !strings.Contains(err.Error(), "was edited") {
+		t.Fatalf("did not protect edited output: %v", err)
+	}
+	after := snapshot(t, dir)
+	if !sameFiles(before, after) {
+		t.Fatal("failed regeneration changed files")
+	}
+}
+func TestOutputBoundaries(t *testing.T) {
+	for _, kind := range []string{"symlink", "unowned", "lock", "caseCollision"} {
+		t.Run(kind, func(t *testing.T) {
+			root := t.TempDir()
+			dir := filepath.Join(root, "app")
+			api := filepath.Join(root, "input/service.api")
+			writeFile(t, api, starterAPI)
+			switch kind {
+			case "symlink":
+				if err := os.MkdirAll(dir, 0755); err != nil {
+					t.Fatal(err)
+				}
+				outside := filepath.Join(root, "outside")
+				os.MkdirAll(outside, 0755)
+				if err := os.Symlink(outside, filepath.Join(dir, "internal")); err != nil {
+					t.Fatal(err)
+				}
+			case "unowned":
+				writeFile(t, filepath.Join(dir, "internal/types/typesGen.go"), "package types // mine\n")
+			case "lock":
+				writeFile(t, filepath.Join(dir, ".goOmni/api.lock"), "someone else")
+			case "caseCollision":
+				writeFile(t, api, starterAPI+"\n@server (group: gReet)\nservice greet-api {\n @handler extra\n get /extra\n}\n")
+			}
+			before := snapshot(t, root)
+			if _, err := Generate(Options{Dir: dir, API: api, Module: "example.com/test", FrameworkDir: frameworkRoot(t)}); err == nil {
+				t.Fatal("unsafe output accepted")
+			}
+			if !sameFiles(before, snapshot(t, root)) {
+				t.Fatal("conflict changed files")
+			}
+		})
+	}
+}
+func snapshot(t *testing.T, root string) map[string]string {
+	t.Helper()
+	out := map[string]string{}
+	err := filepath.WalkDir(root, func(path string, d os.DirEntry, err error) error {
+		if err != nil {
+			return err
+		}
+		if d.Type().IsRegular() {
+			data, e := os.ReadFile(path)
+			if e != nil {
+				return e
+			}
+			rel, _ := filepath.Rel(root, path)
+			out[rel] = string(data)
+		}
+		return nil
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	return out
+}
+func sameFiles(a, b map[string]string) bool {
+	if len(a) != len(b) {
+		return false
+	}
+	for k, v := range a {
+		if b[k] != v {
+			return false
+		}
+	}
+	return true
+}
+
+func TestGeneratedProjectsBuildAndRun(t *testing.T) {
+	if testing.Short() {
+		t.Skip("consumer module integration")
+	}
+	root := frameworkRoot(t)
+	for _, starter := range []bool{true, false} {
+		name := "contract"
+		if starter {
+			name = "starter"
+		}
+		t.Run(name, func(t *testing.T) {
+			dir := filepath.Join(t.TempDir(), "project")
+			o := Options{Dir: dir, Module: "example.com/consumer", FrameworkDir: root, LogOutput: "file", LogFormat: "text"}
+			var err error
+			if starter {
+				_, err = New(o)
+			} else {
+				o.API = filepath.Join(root, "examples/contracts/user.api")
+				_, err = Generate(o)
+			}
+			if err != nil {
+				t.Fatal(err)
+			}
+			source := consumerContractTest
+			if starter {
+				source = consumerStarterTest
+			} else {
+				writeFile(t, filepath.Join(dir, "internal/service/user/updateUser.go"), `package user
+import("context";"example.com/consumer/internal/types")
+func(s *Service) UpdateUser(ctx context.Context,req *types.UpdateUserReq)(*types.UserResp,error){return &types.UserResp{UserID:req.UserID,Name:req.Name,Active:req.Active},nil}
+`)
+			}
+			writeFile(t, filepath.Join(dir, "contract_test.go"), source)
+			o.API = filepath.Join(dir, "api/service.api")
+			if !starter {
+				o.API = filepath.Join(dir, "api/user.api")
+			}
+			if _, err = Generate(o); err != nil {
+				t.Fatal(err)
+			}
+			ctx, cancel := context.WithTimeout(context.Background(), 90*time.Second)
+			defer cancel()
+			cmd := exec.CommandContext(ctx, "go", "test", "-mod=mod", "-race", "-count=1", "./...")
+			cmd.Dir = dir
+			cmd.Env = append(os.Environ(), "GOWORK=off", "GOFLAGS=")
+			output, err := cmd.CombinedOutput()
+			if err != nil {
+				t.Fatalf("consumer: %v\n%s", err, output)
+			}
+			t.Log(string(output))
+		})
+	}
+}
+
+const consumerStarterTest = `package consumer_test
+import("context";"io";"net/http/httptest";"strings";"testing";omni "git.yuntuo.hk/k2safe/go-omni";"git.yuntuo.hk/k2safe/go-omni/logx";"example.com/consumer/internal/handler";"example.com/consumer/internal/servicecontext";"example.com/consumer/internal/settings")
+func TestGreeting(t *testing.T){cfg,err:=settings.Load("etc/config.yaml");if err!=nil{t.Fatal(err)};cfg.Server.Log.Writer=io.Discard;cfg.Server.Log.File="";cfg.Server.Log.Rotation=logx.RotationConfig{};logger,err:=logx.New(cfg.Server.Log);if err!=nil{t.Fatal(err)};defer logger.Close();deps,err:=servicecontext.New(context.Background(),logger);if err!=nil{t.Fatal(err)};defer deps.Close();app:=omni.New();defer app.Close();if err=handler.RegisterRoutes(app,deps);err!=nil{t.Fatal(err)};w:=httptest.NewRecorder();app.Engine().ServeHTTP(w,httptest.NewRequest("GET","/api/greet/Alice",nil));if w.Code!=200||!strings.Contains(w.Body.String(),"Hello Alice")||w.Header().Get("X-Request-ID")==""{t.Fatalf("%d %s",w.Code,w.Body.String())}}
+`
+const consumerContractTest = `package consumer_test
+import("context";"encoding/json";"io";"net/http/httptest";"strings";"testing";omni "git.yuntuo.hk/k2safe/go-omni";"git.yuntuo.hk/k2safe/go-omni/logx";"example.com/consumer/internal/handler";"example.com/consumer/internal/servicecontext")
+func TestContract(t *testing.T){cfg:=logx.Default();cfg.Writer=io.Discard;logger,err:=logx.New(cfg);if err!=nil{t.Fatal(err)};defer logger.Close();deps,err:=servicecontext.New(context.Background(),logger);if err!=nil{t.Fatal(err)};defer deps.Close();app:=omni.New();defer app.Close();if err=handler.RegisterRoutes(app,deps);err!=nil{t.Fatal(err)}
+ for _,tc:=range []struct{method,path,body string;status int}{
+ {"PUT","/api/v1/users/7?notify=true",` + "`" + `{"name":"Alice","active":false,"age":0}` + "`" + `,200},
+ {"PUT","/api/v1/users/7",` + "`" + `{"name":"Alice"}` + "`" + `,400},
+ {"PUT","/api/v1/users/7?notify=true&notify=false",` + "`" + `{"name":"Alice","active":false}` + "`" + `,400},
+ {"PUT","/api/v1/users/7",` + "`" + `{"name":"Alice","active":false,"age":151}` + "`" + `,400},
+ {"GET","/api/v1/users?page=0","",400},
+ {"GET","/api/v1/users?page=1","",501},
+ {"DELETE","/admin/v1/users/7","",501},
+ }{req:=httptest.NewRequest(tc.method,tc.path,strings.NewReader(tc.body));req.Header.Set("Content-Type","application/json");w:=httptest.NewRecorder();app.Engine().ServeHTTP(w,req);if w.Code!=tc.status{t.Fatalf("%s: %d %s",tc.path,w.Code,w.Body.String())};if tc.status==200{var v struct{Data struct{UserID int64 ` + "`json:\"userId\"`" + `;Name string ` + "`json:\"name\"`" + `}};if err:=json.Unmarshal(w.Body.Bytes(),&v);err!=nil||v.Data.UserID!=7||v.Data.Name!="Alice"{t.Fatal(w.Body.String())}}}
+ delete(deps.Middlewares,"Auth");if err:=handler.RegisterRoutes(omni.New(),deps);err==nil{t.Fatal("missing auth hook accepted")}
+}
+`

cmd/go-omni/apigen/compatibility_test.go

@@ -0,0 +1,161 @@
+package apigen
+
+import (
+	"context"
+	"encoding/json"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+	"testing"
+	"time"
+)
+
+func TestCompatibilityContract(t *testing.T) {
+	s, err := Parse(filepath.Join(frameworkRoot(t), "examples/contracts/compatibility.api"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	c, err := Compile(s)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(s.Scalars) != 1 || len(s.Routes) != 6 {
+		t.Fatal("incomplete contract")
+	}
+	if !strings.Contains(string(c.Document), `"anyOf"`) || !strings.Contains(string(c.Document), `"multipart/form-data"`) {
+		t.Fatal("missing schemas")
+	}
+	for _, change := range [][2]string{{"jsonInput: string | int64", "jsonInput: mystery"}, {"text: true", "text: false"}, {"mode: multipart", "mode: invalid"}, {"maxBytes: 128", "maxBytes: 0"}, {"goType: ID", "goType: id"}, {"Data any", "Data interface{ Method() }"}} {
+		source := readFile(t, filepath.Join(frameworkRoot(t), "examples/contracts/compatibility.api"))
+		spec, err := parseText(t, strings.Replace(source, change[0], change[1], 1))
+		if err == nil {
+			_, err = Compile(spec)
+		}
+		if err == nil {
+			t.Fatalf("accepted %s", change[1])
+		}
+	}
+}
+func TestCompatibilityConsumer(t *testing.T) {
+	if os.Getenv("GO_OMNI_SCAFFOLD_INTEGRATION") == "" {
+		t.Skip("consumer integration")
+	}
+	root := frameworkRoot(t)
+	dir := filepath.Join(t.TempDir(), "consumer")
+	o := Options{API: filepath.Join(root, "examples/contracts/compatibility.api"), Dir: dir, Module: "example.com/compatibility", FrameworkDir: root}
+	releaseCLI := os.Getenv("GO_OMNI_RELEASE_CLI")
+	generate := func(check bool) {
+		t.Helper()
+		if releaseCLI == "" {
+			options := o
+			options.Check = check
+			if _, err := Generate(options); err != nil {
+				t.Fatal(err)
+			}
+			return
+		}
+		ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
+		defer cancel()
+		args := []string{"api", "generate", "--api", o.API, "--dir", dir, "--module", o.Module}
+		if check {
+			args = append(args, "--check")
+		}
+		cmd := exec.CommandContext(ctx, releaseCLI, args...)
+		cmd.Dir = filepath.Dir(dir)
+		if output, err := cmd.CombinedOutput(); err != nil {
+			t.Fatalf("released CLI: %v\n%s", err, output)
+		}
+	}
+	generate(false)
+	files := map[string]string{
+		"internal/service/demo/echo.go":            "echo.go",
+		"internal/handler/demo/customBind.go":      "hooks.go",
+		"internal/handler/files/downloadManual.go": "download.go",
+		"consumer_test.go":                         "consumer_test.go",
+	}
+	// The fixture implements related methods together; remove only its generated
+	// one-time stubs, then fill every stub so regeneration can preserve all files.
+	for _, name := range []string{"internal/service/demo/item.go", "internal/service/demo/custom.go"} {
+		writeFile(t, filepath.Join(dir, name), "package demo\n")
+	}
+	for _, name := range []string{"internal/handler/demo/uploadManual.go", "internal/handler/demo/callbackManual.go"} {
+		writeFile(t, filepath.Join(dir, name), "package demo\n")
+	}
+	for target, source := range files {
+		writeFile(t, filepath.Join(dir, target), readFile(t, filepath.Join("testdata/compatibility", source)))
+	}
+	before := map[string]string{}
+	for target := range files {
+		before[target] = readFile(t, filepath.Join(dir, target))
+	}
+	generate(false)
+	for target, content := range before {
+		if readFile(t, filepath.Join(dir, target)) != content {
+			t.Fatalf("overwrote %s", target)
+		}
+	}
+	generate(true)
+	ctx, cancel := context.WithTimeout(context.Background(), 120*time.Second)
+	defer cancel()
+	cmd := exec.CommandContext(ctx, "go", "test", "-mod=mod", "-race", "-count=1", "./...")
+	cmd.Dir = dir
+	cmd.Env = append(os.Environ(), "GOWORK=off")
+	if output, err := cmd.CombinedOutput(); err != nil {
+		t.Fatalf("consumer: %v\n%s", err, output)
+	}
+	if releaseCLI != "" {
+		cmd = exec.CommandContext(ctx, "go", "list", "-m", "-json", frameworkModule)
+		cmd.Dir = dir
+		cmd.Env = append(os.Environ(), "GOWORK=off")
+		output, err := cmd.CombinedOutput()
+		if err != nil {
+			t.Fatalf("module: %v\n%s", err, output)
+		}
+		var module struct {
+			Version, Sum string
+			Replace      any
+		}
+		if err = json.Unmarshal(output, &module); err != nil {
+			t.Fatal(err)
+		}
+		if module.Version != os.Getenv("GO_OMNI_RELEASE_VERSION") || module.Replace != nil || module.Sum == "" {
+			t.Fatalf("not a fixed remote dependency: %+v", module)
+		}
+		t.Logf("remote framework %s checksum %s; no local replace", module.Version, module.Sum)
+	}
+
+}
+
+func TestNestedDynamicAliases(t *testing.T) {
+	source := readFile(t, filepath.Join(frameworkRoot(t), "examples/contracts/compatibility.api"))
+	for _, typ := range []string{"[]interface{}", "map[string]interface{}", "map[string][]interface{}"} {
+		s, err := parseText(t, strings.Replace(source, "Data any", "Data "+typ, 1))
+		if err == nil {
+			_, err = Compile(s)
+		}
+		if err != nil {
+			t.Fatalf("%s: %v", typ, err)
+		}
+	}
+}
+func TestSwitchFromManualRequiresExplicitMigration(t *testing.T) {
+	root := frameworkRoot(t)
+	o := Options{API: filepath.Join(root, "examples/contracts/compatibility.api"), Dir: filepath.Join(t.TempDir(), "consumer"), Module: "example.com/compatibility", FrameworkDir: root}
+	if _, err := Generate(o); err != nil {
+		t.Fatal(err)
+	}
+	// The hand-written source may contain business code. Never delete it to make
+	// the newly automatic handler compile; fail before touching generated files.
+	o.API = filepath.Join(o.Dir, "api/compatibility.api")
+	source := readFile(t, o.API)
+	source = strings.Replace(source, "@handlerMode manual\n @produces \"application/octet-stream\"", "", 1)
+	writeFile(t, o.API, source)
+	before := snapshot(t, o.Dir)
+	if _, err := Generate(o); err == nil || !strings.Contains(err.Error(), "migrate and remove") {
+		t.Fatalf("unsafe mode switch: %v", err)
+	}
+	if !sameFiles(before, snapshot(t, o.Dir)) {
+		t.Fatal("failed mode switch mutated project")
+	}
+}

cmd/go-omni/apigen/compile.go

@@ -0,0 +1,352 @@
+package apigen
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"go/ast"
+	goparser "go/parser"
+	gotoken "go/token"
+	"reflect"
+	"regexp"
+	"sort"
+	"strings"
+
+	"git.yuntuo.hk/k2safe/go-omni/contract"
+	"git.yuntuo.hk/k2safe/go-omni/httpx"
+	"git.yuntuo.hk/k2safe/go-omni/openapi"
+)
+
+type Compiled struct {
+	Spec     *Spec
+	Bindings map[string]*contract.Binder
+	Document []byte
+	Groups   []string
+}
+
+var exportedName = regexp.MustCompile(`^[A-Z][A-Za-z0-9]*$`)
+var goName = regexp.MustCompile(`^[a-zA-Z][A-Za-z0-9]*$`)
+var lowerName = regexp.MustCompile(`^[a-z][A-Za-z0-9]*$`)
+var serviceName = regexp.MustCompile(`^[a-zA-Z][a-zA-Z0-9-]*$`)
+var staticSegment = regexp.MustCompile(`^[A-Za-z0-9._~-]+$`)
+
+func Compile(spec *Spec) (*Compiled, error) {
+	if spec == nil || len(spec.Routes) == 0 || !serviceName.MatchString(spec.Service) {
+		return nil, errors.New("api: valid service and routes required")
+	}
+	var prepareErr error
+	spec, prepareErr = prepareMetadata(spec)
+	if prepareErr != nil {
+		return nil, prepareErr
+	}
+	definitions := map[string]Type{}
+	for _, t := range spec.Types {
+		if t.Name == "ContractScalars" && len(spec.Scalars) > 0 {
+			return nil, errors.New("ContractScalars is reserved when declaring scalars")
+		}
+		if !exportedName.MatchString(t.Name) {
+			return nil, fmt.Errorf("%s: type names must be UpperCamelCase", t.Position)
+		}
+		if _, ok := definitions[t.Name]; ok {
+			return nil, fmt.Errorf("%s: duplicate type %s", t.Position, t.Name)
+		}
+		definitions[t.Name] = t
+	}
+	scalarTypes, scalarDefs, err := compileScalars(spec, definitions)
+	if err != nil {
+		return nil, err
+	}
+	resolved := map[string]reflect.Type{}
+	resolving := map[string]bool{}
+	var resolve func(string, int) (reflect.Type, error)
+	var expression func(ast.Expr, int) (reflect.Type, error)
+	primitives := map[string]reflect.Type{"any": reflect.TypeOf((*any)(nil)).Elem(), "string": reflect.TypeOf(""), "bool": reflect.TypeOf(false), "int": reflect.TypeOf(int(0)), "int8": reflect.TypeOf(int8(0)), "int16": reflect.TypeOf(int16(0)), "int32": reflect.TypeOf(int32(0)), "int64": reflect.TypeOf(int64(0)), "uint": reflect.TypeOf(uint(0)), "uint8": reflect.TypeOf(uint8(0)), "uint16": reflect.TypeOf(uint16(0)), "uint32": reflect.TypeOf(uint32(0)), "uint64": reflect.TypeOf(uint64(0)), "float32": reflect.TypeOf(float32(0)), "float64": reflect.TypeOf(float64(0))}
+	expression = func(e ast.Expr, depth int) (reflect.Type, error) {
+		if depth > 32 {
+			return nil, errors.New("type nesting exceeds 32")
+		}
+		switch e := e.(type) {
+		case *ast.Ident:
+			if t, ok := scalarTypes[e.Name]; ok {
+				return t, nil
+			}
+			if t, ok := primitives[e.Name]; ok {
+				return t, nil
+			}
+			return resolve(e.Name, depth+1)
+		case *ast.StarExpr:
+			if _, double := e.X.(*ast.StarExpr); double {
+				return nil, errors.New("multiple pointer levels unsupported")
+			}
+			t, err := expression(e.X, depth+1)
+			if err != nil {
+				return nil, err
+			}
+			return reflect.PointerTo(t), nil
+		case *ast.ArrayType:
+			if e.Len != nil {
+				return nil, errors.New("use slices, not fixed arrays")
+			}
+			t, err := expression(e.Elt, depth+1)
+			if err != nil {
+				return nil, err
+			}
+			return reflect.SliceOf(t), nil
+		case *ast.MapType:
+			key, ok := e.Key.(*ast.Ident)
+			if !ok || key.Name != "string" {
+				return nil, errors.New("map keys must be string")
+			}
+			t, err := expression(e.Value, depth+1)
+			if err != nil {
+				return nil, err
+			}
+			return reflect.MapOf(reflect.TypeOf(""), t), nil
+		default:
+			return nil, errors.New("unsupported type expression")
+		}
+	}
+	resolve = func(name string, depth int) (reflect.Type, error) {
+		if depth > 32 {
+			return nil, errors.New("type nesting exceeds 32")
+		}
+		if t, ok := resolved[name]; ok {
+			return t, nil
+		}
+		if resolving[name] {
+			return nil, fmt.Errorf("recursive type %s is unsupported", name)
+		}
+		typ, ok := definitions[name]
+		if !ok {
+			return nil, fmt.Errorf("unknown type %s", name)
+		}
+		resolving[name] = true
+		defer delete(resolving, name)
+		var fields []reflect.StructField
+		seen := map[string]bool{}
+		for _, f := range typ.Fields {
+			if !exportedName.MatchString(f.Name) || seen[f.Name] {
+				return nil, fmt.Errorf("%s: invalid or duplicate field %s", name, f.Name)
+			}
+			seen[f.Name] = true
+			expr, err := goparser.ParseExpr(f.Type)
+			if err != nil {
+				return nil, err
+			}
+			t, err := expression(expr, depth+1)
+			if err != nil {
+				return nil, fmt.Errorf("%s.%s: %w", name, f.Name, err)
+			}
+			fields = append(fields, reflect.StructField{Name: f.Name, Type: t, Tag: reflect.StructTag(f.Tag)})
+		}
+		t := reflect.StructOf(fields)
+		resolved[name] = t
+		return t, nil
+	}
+	c := &Compiled{Spec: spec, Bindings: map[string]*contract.Binder{}}
+	for _, t := range spec.Types {
+		rt, err := resolve(t.Name, 0)
+		if err != nil {
+			return nil, err
+		}
+		b, err := contract.Describe(rt, scalarDefs...)
+		if err != nil {
+			return nil, fmt.Errorf("%s: %w", t.Position, err)
+		}
+		c.Bindings[t.Name] = b
+	}
+	api, err := openapi.New(spec.Title, spec.Version)
+	if err != nil {
+		return nil, err
+	}
+	handlers, paths, shapes, groups := map[string]bool{}, map[string]bool{}, map[string]string{}, map[string]bool{}
+	middlewareSymbols := map[string]string{}
+	for _, r := range spec.Routes {
+		if !goName.MatchString(r.Handler) {
+			return nil, fmt.Errorf("%s: invalid handler name", r.Position)
+		}
+		if strings.EqualFold(r.Handler, "service") {
+			return nil, errors.New("handler name service conflicts with the service constructor file")
+		}
+		if r.Group == "" {
+			return nil, errors.New("group required")
+		}
+		for _, part := range strings.Split(r.Group, "/") {
+			if !lowerName.MatchString(part) || gotoken.Lookup(part).IsKeyword() {
+				return nil, fmt.Errorf("invalid lowerCamelCase group %q", r.Group)
+			}
+		}
+		h := r.Group + "/" + strings.ToLower(r.Handler)
+		if handlers[h] {
+			return nil, fmt.Errorf("duplicate handler %s in group %s", r.Handler, r.Group)
+		}
+		handlers[h] = true
+		groups[r.Group] = true
+		mseen := map[string]bool{}
+		for _, m := range r.Middleware {
+			if !goName.MatchString(m) || mseen[m] {
+				return nil, fmt.Errorf("invalid or duplicate middleware %q", m)
+			}
+			mseen[m] = true
+			if strings.EqualFold(m, "defaults") || strings.EqualFold(m, "registryGen") {
+				return nil, fmt.Errorf("reserved middleware name %q", m)
+			}
+			if prior, ok := middlewareSymbols[strings.ToLower(m)]; ok && prior != m {
+				return nil, fmt.Errorf("middleware names %s and %s collide", prior, m)
+			}
+			middlewareSymbols[strings.ToLower(m)] = m
+		}
+		shape, err := routeShape(r.Path)
+		if err != nil {
+			return nil, fmt.Errorf("%s: %w", r.Position, err)
+		}
+		for _, prior := range spec.Routes {
+			if prior.Method != r.Method || prior.Path == r.Path {
+				continue
+			}
+			if conflictPrefix(prior.Path, r.Path) {
+				return nil, fmt.Errorf("conflicting parameter names at a shared route prefix: %s and %s", prior.Path, r.Path)
+			}
+		}
+		if prior, exists := shapes[shape]; exists && prior != r.Path {
+			return nil, fmt.Errorf("ambiguous route parameter names: %s and %s", prior, r.Path)
+		}
+		shapes[shape] = r.Path
+		pathKey := r.Method + " " + shape
+		if paths[pathKey] {
+			return nil, fmt.Errorf("duplicate route %s", pathKey)
+		}
+		paths[pathKey] = true
+		if r.Path == "/health/live" || r.Path == "/health/ready" || r.Path == "/openapi.json" {
+			return nil, fmt.Errorf("route %s is reserved by the generated server", r.Path)
+		}
+		if r.Method != strings.ToLower(r.Method) {
+			return nil, errors.New("HTTP methods must be lowercase")
+		}
+		if r.Status != 200 && r.Status != 201 && r.Status != 202 && r.Status != 204 {
+			return nil, errors.New("@status supports 200, 201, 202 or 204")
+		}
+		if !r.Manual && (r.Status == 204) != (r.Response == "") {
+			return nil, errors.New("204 requires no response; other success statuses require a response type")
+		}
+		if r.Method == "head" && r.Response != "" {
+			return nil, errors.New("HEAD must not declare a response body")
+		}
+		if err := validateRouteExtensions(r); err != nil {
+			return nil, fmt.Errorf("%s: %w", r.Position, err)
+		}
+		op := openapi.Operation{Method: r.Method, Path: r.Path, OperationID: operationID(r), Summary: r.Summary, Responses: map[int]openapi.Response{}}
+		if r.Request != "" {
+			b, ok := c.Bindings[r.Request]
+			if !ok {
+				return nil, fmt.Errorf("unknown request %s", r.Request)
+			}
+			op.Parameters = b.Parameters()
+			op.Request = b.BodySchema()
+			if op.Request != nil && (r.BodyMode == "raw" || r.BodyMode == "multipart") {
+				return nil, errors.New("raw/multipart request DTOs may declare only path/form/header fields; body binding is manual")
+			}
+			if op.Request != nil && (r.Method == "get" || r.Method == "head") {
+				return nil, errors.New("GET/HEAD requests cannot declare JSON bodies; use form/path/header tags")
+			}
+		}
+		var response *openapi.Schema
+		if r.Response != "" {
+			b, ok := c.Bindings[r.Response]
+			if !ok {
+				return nil, fmt.Errorf("unknown response %s", r.Response)
+			}
+			s, err := b.ResponseSchema()
+			if err != nil {
+				return nil, err
+			}
+			if r.ResponseFormat == "raw" {
+				response = s
+			} else {
+				response, err = openapi.EnvelopeWith(s, responseConfig(spec, r))
+				if err != nil {
+					return nil, err
+				}
+			}
+		}
+		op.Responses[r.Status] = openapi.Response{Description: "Success", Schema: response}
+		errorSchema, err := openapi.EnvelopeWith(nil, responseConfig(spec, r))
+		if err != nil {
+			return nil, err
+		}
+		for _, code := range []int{400, 413, 415, 500, 501} {
+			op.Responses[code] = openapi.Response{Description: "Error", Schema: errorSchema}
+		}
+		if err = api.Handle(discardRoutes{}, op, func(*httpx.Context) error { return nil }); err != nil {
+			return nil, fmt.Errorf("%s: %w", r.Position, err)
+		}
+	}
+	for group := range groups {
+		c.Groups = append(c.Groups, group)
+	}
+	sort.Strings(c.Groups)
+	c.Document, err = api.JSON()
+	if err != nil {
+		return nil, err
+	}
+	// Decorate the document with explicit auth/error contracts. Credential
+	// validation remains in the linked application middleware.
+	var doc map[string]any
+	decoder := json.NewDecoder(bytes.NewReader(c.Document))
+	decoder.UseNumber()
+	if err = decoder.Decode(&doc); err != nil {
+		return nil, err
+	}
+	decorateDocument(doc, spec)
+	c.Document, err = json.MarshalIndent(doc, "", "  ")
+	return c, err
+}
+
+type discardRoutes struct{}
+
+func (discardRoutes) Handle(string, string, httpx.Handler, ...httpx.Middleware) {}
+func operationID(r Route) string {
+	return strings.ReplaceAll(r.Group, "/", "_") + "_" + upper(r.Handler)
+}
+func upper(s string) string { return strings.ToUpper(s[:1]) + s[1:] }
+func lower(s string) string { return strings.ToLower(s[:1]) + s[1:] }
+func routeShape(path string) (string, error) {
+	if path == "/" {
+		return path, nil
+	}
+	if !strings.HasPrefix(path, "/") {
+		return "", errors.New("route must start with /")
+	}
+	parts := strings.Split(path[1:], "/")
+	seen := map[string]bool{}
+	for i, part := range parts {
+		if strings.HasPrefix(part, ":") {
+			name := part[1:]
+			if !lowerName.MatchString(name) || seen[name] {
+				return "", errors.New("invalid/duplicate path parameter")
+			}
+			seen[name] = true
+			parts[i] = ":"
+		} else if !staticSegment.MatchString(part) || part == "." || part == ".." {
+			return "", errors.New("invalid route segment")
+		}
+	}
+	return "/" + strings.Join(parts, "/"), nil
+}
+
+func conflictPrefix(left, right string) bool {
+	a, b := strings.Split(left, "/"), strings.Split(right, "/")
+	for i := 0; i < len(a) && i < len(b); i++ {
+		if strings.HasPrefix(a[i], ":") && strings.HasPrefix(b[i], ":") {
+			if a[i] != b[i] {
+				return true
+			}
+			continue
+		}
+		if a[i] != b[i] {
+			return false
+		}
+	}
+	return false
+}

cmd/go-omni/apigen/contractMetadata.go

@@ -0,0 +1,221 @@
+package apigen
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"regexp"
+	"sort"
+	"strings"
+
+	"git.yuntuo.hk/k2safe/go-omni/openapi"
+	"git.yuntuo.hk/k2safe/go-omni/response"
+)
+
+var errorCode = regexp.MustCompile(`^[A-Z][A-Z0-9_]*$`)
+var credentialName = regexp.MustCompile("^[!#$%&'*+.^_`|~0-9A-Za-z-]+$")
+
+// prepareMetadata returns a detached spec; repeated compilation must not prepend
+// authentication middleware more than once or mutate the parser's output.
+func prepareMetadata(original *Spec) (*Spec, error) {
+	spec := *original
+	spec.Routes = append([]Route(nil), original.Routes...)
+	if err := validateResponses(&spec); err != nil {
+		return nil, err
+	}
+	definitions := map[string]ErrorDefinition{}
+	codes, symbols := map[string]bool{}, map[string]bool{}
+	for _, e := range spec.Errors {
+		if !exportedName.MatchString(e.Name) || e.Status < 400 || e.Status > 599 || !errorCode.MatchString(e.Code) || strings.TrimSpace(e.Message) == "" {
+			return nil, fmt.Errorf("%s: error requires UpperCamelCase name, status 400..599, UPPER_SNAKE_CASE code and a nonempty public message", e.Position)
+		}
+		if codes[e.Code] {
+			return nil, fmt.Errorf("%s: duplicate error code %s", e.Position, e.Code)
+		}
+		for _, symbol := range []string{e.Name, "Code" + e.Name} {
+			if symbols[symbol] {
+				return nil, fmt.Errorf("%s: duplicate error symbol %s", e.Position, symbol)
+			}
+			symbols[symbol] = true
+		}
+		codes[e.Code] = true
+		definitions[e.Name] = e
+	}
+	auth := map[string]AuthDefinition{}
+	for _, a := range spec.Auth {
+		if !exportedName.MatchString(a.Name) || !goName.MatchString(a.Middleware) || strings.EqualFold(a.Middleware, "defaults") || strings.EqualFold(a.Middleware, "registryGen") {
+			return nil, fmt.Errorf("%s: auth requires an UpperCamelCase name and a valid named middleware", a.Position)
+		}
+		if _, ok := auth[a.Name]; ok {
+			return nil, fmt.Errorf("%s: duplicate auth %s", a.Position, a.Name)
+		}
+		switch a.Type {
+		case "bearer":
+			if a.In != "" || a.KeyName != "" {
+				return nil, fmt.Errorf("%s: bearer auth does not accept in/name", a.Position)
+			}
+		case "apiKey":
+			if (a.In != "header" && a.In != "cookie") || !credentialName.MatchString(a.KeyName) || a.BearerFormat != "" {
+				return nil, fmt.Errorf("%s: apiKey requires in header/cookie and a valid name; bearerFormat is not supported", a.Position)
+			}
+			if a.In == "header" && (strings.EqualFold(a.KeyName, "Authorization") || strings.EqualFold(a.KeyName, "Cookie")) {
+				return nil, fmt.Errorf("%s: use bearer for Authorization or in cookie for a session", a.Position)
+			}
+		default:
+			return nil, fmt.Errorf("%s: auth type must be bearer or apiKey", a.Position)
+		}
+		auth[a.Name] = a
+	}
+	for i := range spec.Routes {
+		r := &spec.Routes[i]
+		r.Middleware = append([]string(nil), r.Middleware...)
+		if r.Auth != "" && r.Auth != "none" {
+			a, ok := auth[r.Auth]
+			if !ok {
+				return nil, fmt.Errorf("%s: unknown auth %s; declare auth %s (...) first", r.Position, r.Auth, r.Auth)
+			}
+			for _, m := range r.Middleware {
+				if strings.EqualFold(m, a.Middleware) {
+					return nil, fmt.Errorf("%s: auth %s already installs %s; remove it from middleware", r.Position, r.Auth, a.Middleware)
+				}
+			}
+			r.Middleware = append([]string{a.Middleware}, r.Middleware...)
+		}
+		seen := map[string]bool{}
+		for _, name := range r.Errors {
+			if _, ok := definitions[name]; !ok {
+				return nil, fmt.Errorf("%s: unknown error %s; declare it in error (...)", r.Position, name)
+			}
+			if seen[name] {
+				return nil, fmt.Errorf("%s: duplicate error %s", r.Position, name)
+			}
+			seen[name] = true
+		}
+		seen = map[string]bool{}
+		for _, tag := range r.Tags {
+			if strings.TrimSpace(tag) == "" || seen[tag] {
+				return nil, fmt.Errorf("%s: @doc tags must be nonempty and unique", r.Position)
+			}
+			seen[tag] = true
+		}
+	}
+	return &spec, nil
+}
+
+func decorateDocument(doc map[string]any, spec *Spec) {
+	if spec.Description != "" {
+		doc["info"].(map[string]any)["description"] = spec.Description
+	}
+	schemes := map[string]any{}
+	for _, a := range spec.Auth {
+		scheme := map[string]any{}
+		if a.Type == "bearer" {
+			scheme["type"], scheme["scheme"] = "http", "bearer"
+			if a.BearerFormat != "" {
+				scheme["bearerFormat"] = a.BearerFormat
+			}
+		} else {
+			scheme["type"], scheme["in"], scheme["name"] = "apiKey", a.In, a.KeyName
+		}
+		if a.Description != "" {
+			scheme["description"] = a.Description
+		}
+		schemes[a.Name] = scheme
+	}
+	doc["components"].(map[string]any)["securitySchemes"] = schemes
+	definitions := map[string]ErrorDefinition{}
+	for _, e := range spec.Errors {
+		definitions[e.Name] = e
+	}
+	if len(spec.Errors) > 0 {
+		doc["x-omni-errors"] = spec.Errors
+	}
+	for _, r := range spec.Routes {
+		policy := response.MustNew(responseConfig(spec, r))
+		cfg := policy.Config()
+		parts := strings.Split(r.Path, "/")
+		for i, part := range parts {
+			if strings.HasPrefix(part, ":") {
+				parts[i] = "{" + part[1:] + "}"
+			}
+		}
+		op := doc["paths"].(map[string]any)[strings.Join(parts, "/")].(map[string]any)[r.Method].(map[string]any)
+		decorateRequestOptions(op, r)
+		if r.ResponseFormat != "" {
+			op["x-omni-response"] = r.ResponseFormat
+		}
+		if len(r.Middleware) > 0 {
+			op["x-omni-middleware"] = r.Middleware
+		}
+		if r.Auth != "" && r.Auth != "none" {
+			op["security"] = []map[string][]string{{r.Auth: {}}}
+		} else {
+			op["security"] = []any{}
+		}
+		if r.Description != "" {
+			op["description"] = r.Description
+		}
+		if len(r.Tags) > 0 {
+			op["tags"] = r.Tags
+		} else {
+			op["tags"] = []string{r.Group}
+		}
+		if r.Deprecated {
+			op["deprecated"] = true
+		}
+		responses := op["responses"].(map[string]any)
+		if r.Auth != "" && r.Auth != "none" {
+			responses["401"] = genericErrorResponse("Authentication required", cfg)
+		}
+		grouped := map[int][]ErrorDefinition{}
+		for _, name := range r.Errors {
+			e := definitions[name]
+			grouped[e.Status] = append(grouped[e.Status], e)
+		}
+		if len(r.Errors) > 0 {
+			op["x-omni-errors"] = r.Errors
+		}
+		for status, errs := range grouped {
+			key := fmt.Sprint(status)
+			response, exists := responses[key].(map[string]any)
+			if !exists {
+				response = genericErrorResponse(http.StatusText(status), cfg)
+				responses[key] = response
+			}
+			media := response["content"].(map[string]any)["application/json"].(map[string]any)
+			examples := map[string]any{}
+			codes := []any{}
+			seenCodes := map[string]bool{}
+			description := []string{}
+			sort.Slice(errs, func(i, j int) bool { return errs[i].Name < errs[j].Name })
+			for _, e := range errs {
+				value := policy.Value(responseResult(e))
+				examples[e.Name] = map[string]any{"summary": e.Message, "value": value}
+				codeKey := fmt.Sprint(value[cfg.CodeField])
+				if !seenCodes[codeKey] {
+					codes = append(codes, value[cfg.CodeField])
+					seenCodes[codeKey] = true
+				}
+				description = append(description, e.Code+": "+e.Message)
+			}
+			media["examples"] = examples
+			if !exists && cfg.Body == nil && cfg.CodeField != "-" {
+				media["schema"].(map[string]any)["properties"].(map[string]any)[cfg.CodeField].(map[string]any)["enum"] = codes
+			}
+			response["description"] = strings.Join(description, "\n")
+		}
+	}
+}
+func responseResult(e ErrorDefinition) response.Result {
+	return response.Result{Status: e.Status, Code: e.Code, Message: e.Message, RequestID: "exampleRequest"}
+}
+func genericErrorResponse(description string, cfg response.Config) map[string]any {
+	if description == "" {
+		description = "Error"
+	}
+	schema, _ := openapi.EnvelopeWith(nil, cfg)
+	data, _ := json.Marshal(schema)
+	var value map[string]any
+	_ = json.Unmarshal(data, &value)
+	return map[string]any{"description": description, "content": map[string]any{"application/json": map[string]any{"schema": value}}}
+}

cmd/go-omni/apigen/declarations.go

@@ -0,0 +1,165 @@
+package apigen
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+// ErrorDefinition declares a public, stable error. Generated constructors return
+// a fresh error each time so WithCause cannot mutate a shared singleton.
+type ErrorDefinition struct {
+	Name     string `json:"name"`
+	Status   int    `json:"status"`
+	Code     string `json:"code"`
+	Message  string `json:"message"`
+	Position string `json:"-"`
+}
+type AuthDefinition struct {
+	Name, Type, In, KeyName, Middleware, Description, BearerFormat, Position string
+}
+
+func (p *parser) parseErrors() error {
+	p.next()
+	block := p.peek() == "("
+	if block {
+		p.next()
+		p.skip()
+	}
+	for {
+		pos := p.tokens[p.at].position
+		name, err := p.ident()
+		if err != nil {
+			return err
+		}
+		status, err := strconv.Atoi(p.next().text)
+		if err != nil {
+			return p.err("error HTTP status must be an integer")
+		}
+		code, err := p.quoted()
+		if err != nil {
+			return err
+		}
+		message, err := p.quoted()
+		if err != nil {
+			return err
+		}
+		p.spec.Errors = append(p.spec.Errors, ErrorDefinition{Name: name, Status: status, Code: code, Message: message, Position: pos})
+		if p.peek() != "\n" && p.peek() != ";" && !(block && p.peek() == ")") && p.peek() != "" {
+			return p.err("expected end of error declaration")
+		}
+		if !block {
+			return nil
+		}
+		p.skip()
+		if p.peek() == ")" {
+			p.next()
+			return nil
+		}
+	}
+}
+func (p *parser) parseAuth() error {
+	pos := p.next().position
+	name, err := p.ident()
+	if err != nil {
+		return err
+	}
+	p.skip()
+	props, err := p.metadata()
+	if err != nil {
+		return err
+	}
+	a := AuthDefinition{Name: name, Position: pos}
+	for key, value := range props {
+		switch key {
+		case "type":
+			a.Type = value
+		case "in":
+			a.In = value
+		case "name":
+			a.KeyName = value
+		case "middleware":
+			a.Middleware = value
+		case "description":
+			a.Description = value
+		case "bearerFormat":
+			a.BearerFormat = value
+		default:
+			return fmt.Errorf("%s: unsupported auth property %q", pos, key)
+		}
+	}
+	p.spec.Auth = append(p.spec.Auth, a)
+	return nil
+}
+func (p *parser) names() ([]string, error) {
+	var names []string
+	for {
+		name, err := p.ident()
+		if err != nil {
+			return nil, err
+		}
+		for _, prior := range names {
+			if prior == name {
+				return nil, p.err("duplicate name " + name)
+			}
+		}
+		names = append(names, name)
+		if p.peek() != "," {
+			return names, nil
+		}
+		p.next()
+	}
+}
+func commaList(value string) []string {
+	if value == "" {
+		return nil
+	}
+	result := strings.Split(value, ",")
+	for i := range result {
+		result[i] = strings.TrimSpace(result[i])
+	}
+	return result
+}
+func mergeNames(base, extra []string) []string {
+	result := append([]string(nil), base...)
+	for _, name := range extra {
+		found := false
+		for _, prior := range result {
+			found = found || prior == name
+		}
+		if !found {
+			result = append(result, name)
+		}
+	}
+	return result
+}
+func (p *parser) parseDoc(route *Route) error {
+	if p.peek() != "(" {
+		value, err := p.quoted()
+		route.Summary = value
+		return err
+	}
+	pos := p.tokens[p.at].position
+	props, err := p.metadata()
+	if err != nil {
+		return err
+	}
+	for key, value := range props {
+		switch key {
+		case "summary":
+			route.Summary = value
+		case "description":
+			route.Description = value
+		case "tags":
+			route.Tags = commaList(value)
+		case "deprecated":
+			if value != "true" && value != "false" {
+				return fmt.Errorf("%s: deprecated must be true or false", pos)
+			}
+			route.Deprecated = value == "true"
+		default:
+			return fmt.Errorf("%s: unsupported @doc property %q", pos, key)
+		}
+	}
+	return nil
+}

cmd/go-omni/apigen/generate.go

@@ -0,0 +1,545 @@
+package apigen
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"go/format"
+	"os"
+	"path/filepath"
+	"runtime/debug"
+	"sort"
+	"strconv"
+	"strings"
+
+	"git.yuntuo.hk/k2safe/go-omni/cmd/go-omni/scaffold"
+	"golang.org/x/mod/modfile"
+	"golang.org/x/mod/module"
+	"golang.org/x/mod/semver"
+)
+
+const frameworkModule = "git.yuntuo.hk/k2safe/go-omni"
+const minimumVersion = "v0.9.0-preview"
+const generatedHeader = "// Code generated by go-omni api. DO NOT EDIT.\n"
+
+type Options struct {
+	Database, Storage                                                      string
+	API, Dir, Module, FrameworkDir, FrameworkVersion, LogOutput, LogFormat string
+	Check                                                                  bool
+	DryRun                                                                 bool
+}
+type FileChange struct {
+	Path   string
+	Action string
+}
+type Output struct {
+	Generated, Created, Preserved, Removed []string
+	Changes                                []FileChange
+}
+
+// Generate creates or safely updates one contract-driven project. It renders
+// and validates every output before applying an ownership-checked transaction.
+func Generate(o Options) (Output, error) {
+	if o.Check && o.DryRun {
+		return Output{}, errors.New("--check and --dry-run cannot be combined")
+	}
+	if o.API == "" || o.Dir == "" {
+		return Output{}, errors.New("--api and --dir are required")
+	}
+	spec, err := Parse(o.API)
+	if err != nil {
+		return Output{}, err
+	}
+	compiled, err := Compile(spec)
+	if err != nil {
+		return Output{}, err
+	}
+	return generate(o, compiled, false)
+}
+
+const starterAPI = "syntax = \"v1\"\n\ninfo (\n title: \"Greeting API\"\n version: \"1.0.0\"\n)\n\ntype GreetReq {\n Name string `path:\"name\" binding:\"required,max=80\"`\n}\ntype GreetResp {\n Message string `json:\"message\"`\n}\n\n@server (\n group: greet\n prefix: /api\n)\nservice greet-api {\n @doc \"Greet a visitor\"\n @handler greet\n get /greet/:name (GreetReq) returns (GreetResp)\n}\n"
+
+// New creates a runnable greeting project, including its editable API file.
+func New(o Options) (Output, error) {
+	if o.API != "" || o.Check || o.DryRun {
+		return Output{}, errors.New("api new does not accept --api, --check or --dry-run")
+	}
+	if o.Dir == "" {
+		return Output{}, errors.New("project directory required")
+	}
+	if entries, err := os.ReadDir(o.Dir); err == nil && len(entries) > 0 {
+		return Output{}, errors.New("api new requires an empty directory")
+	} else if err != nil && !errors.Is(err, os.ErrNotExist) {
+		return Output{}, err
+	}
+	tokens, err := lex("service.api", starterAPI)
+	if err != nil {
+		return Output{}, err
+	}
+	spec := &Spec{Version: "1.0.0", Entry: "service.api", Sources: map[string][]byte{"service.api": []byte(starterAPI)}}
+	p := parser{tokens: tokens, spec: spec}
+	if err = p.parse(); err != nil {
+		return Output{}, err
+	}
+	c, err := Compile(spec)
+	if err != nil {
+		return Output{}, err
+	}
+	return generate(o, c, true)
+}
+
+func generate(o Options, c *Compiled, starter bool) (Output, error) {
+	directory, err := filepath.Abs(o.Dir)
+	if err != nil {
+		return Output{}, err
+	}
+	o.Dir = directory
+	for _, r := range c.Spec.Routes {
+		if !r.Manual {
+			path := filepath.Join(directory, "internal/handler", r.Group, lower(r.Handler)+"Manual.go")
+			if _, err := os.Lstat(path); err == nil {
+				return Output{}, fmt.Errorf("manual handler %s exists; migrate and remove it explicitly before switching to automatic generation", path)
+			} else if !errors.Is(err, os.ErrNotExist) {
+				return Output{}, err
+			}
+		}
+	}
+	if err := resolveProfile(&o); err != nil {
+		return Output{}, err
+	}
+	seeds := map[string][]byte{}
+	moduleData, readErr := os.ReadFile(filepath.Join(directory, "go.mod"))
+	if readErr == nil {
+		mf, err := modfile.Parse("go.mod", moduleData, nil)
+		if err != nil || mf.Module == nil {
+			return Output{}, errors.New("invalid project go.mod")
+		}
+		if o.Module != "" && o.Module != mf.Module.Mod.Path {
+			return Output{}, errors.New("--module differs from existing go.mod")
+		}
+		o.Module = mf.Module.Mod.Path
+		found := false
+		requiredVersion := ""
+		for _, r := range mf.Require {
+			if r.Mod.Path == frameworkModule {
+				found = true
+				requiredVersion = r.Mod.Version
+				if o.FrameworkVersion != "" && o.FrameworkVersion != r.Mod.Version {
+					return Output{}, errors.New("existing framework version differs; update go.mod explicitly")
+				}
+			}
+		}
+		if !found {
+			return Output{}, errors.New("existing go.mod must require go-omni")
+		}
+		if semver.Compare(requiredVersion, minimumVersion) < 0 {
+			localCurrent := false
+			for _, r := range mf.Replace {
+				if r.Old.Path == frameworkModule && r.New.Version == "" {
+					path := r.New.Path
+					if !filepath.IsAbs(path) {
+						path = filepath.Join(directory, path)
+					}
+					if _, err := os.Stat(filepath.Join(path, "contract", "scalar.go")); err == nil {
+						localCurrent = true
+					}
+				}
+			}
+			if !localCurrent {
+				return Output{}, fmt.Errorf("existing framework dependency predates migration extensions; use %s or a current local replacement", minimumVersion)
+			}
+		}
+		if o.FrameworkDir != "" {
+			matched := false
+			for _, r := range mf.Replace {
+				if r.Old.Path == frameworkModule && r.New.Version == "" {
+					replacement := r.New.Path
+					if !filepath.IsAbs(replacement) {
+						replacement = filepath.Join(directory, replacement)
+					}
+					matched = canonical(replacement) == canonical(o.FrameworkDir)
+				}
+			}
+			if !matched {
+				return Output{}, errors.New("existing framework replacement differs; update go.mod explicitly")
+			}
+		}
+	} else if !errors.Is(readErr, os.ErrNotExist) {
+		return Output{}, readErr
+	} else {
+		if o.Module == "" {
+			o.Module = filepath.Base(directory)
+		}
+		data, err := moduleFile(o)
+		if err != nil {
+			return Output{}, err
+		}
+		seeds["go.mod"] = data
+	}
+	if err = module.CheckImportPath(o.Module); err != nil {
+		return Output{}, err
+	}
+	generated, base, err := renderProject(o, c, starter)
+	if err != nil {
+		return Output{}, err
+	}
+	for name, data := range base {
+		seeds[name] = data
+	}
+	// The API source remains developer-owned. A relocated project regenerates
+	// from its own api/ tree, including all imports.
+	entry := "api/" + c.Spec.Entry
+	for name, data := range c.Spec.Sources {
+		seeds["api/"+name] = data
+	}
+	if o.API != "" {
+		source, _ := filepath.Abs(o.API)
+		sourceReal, _ := filepath.EvalSymlinks(source)
+		targetReal := canonical(directory)
+		rel, e := filepath.Rel(targetReal, sourceReal)
+		if e == nil && rel != ".." && !strings.HasPrefix(rel, ".."+string(filepath.Separator)) {
+			entry = filepath.ToSlash(rel)
+			for name := range c.Spec.Sources {
+				delete(seeds, "api/"+name)
+			}
+		}
+	}
+	// Source collisions must never leave a copied contract different from the
+	// generated code. On updates, use the developer-owned API in the project.
+	for name, data := range seeds {
+		if strings.HasSuffix(name, ".api") {
+			current, e := os.ReadFile(filepath.Join(directory, filepath.FromSlash(name)))
+			if e == nil && string(current) != string(data) {
+				return Output{}, fmt.Errorf("%s already differs; regenerate from that project API instead", name)
+			}
+		}
+	}
+	seeds["README.md"] = []byte(projectREADME(o.Module, entry) + infrastructureREADME(o))
+	for _, files := range []map[string][]byte{generated, seeds} {
+		for name, data := range files {
+			if strings.HasSuffix(name, ".go") {
+				data, err = format.Source(data)
+				if err != nil {
+					return Output{}, fmt.Errorf("format %s: %w", name, err)
+				}
+				files[name] = data
+			}
+		}
+	}
+	return apply(directory, o.Module, entry, generated, seeds, o.Check, o.DryRun, o.profile())
+}
+
+func moduleFile(o Options) ([]byte, error) {
+	if err := module.CheckImportPath(o.Module); err != nil {
+		return nil, err
+	}
+	root := o.FrameworkDir
+	version := o.FrameworkVersion
+	if root == "" && version == "" {
+		wd, _ := os.Getwd()
+		for wd != "" {
+			data, err := os.ReadFile(filepath.Join(wd, "go.mod"))
+			if err == nil {
+				mf, e := modfile.Parse("go.mod", data, nil)
+				if e == nil && mf.Module != nil && mf.Module.Mod.Path == frameworkModule {
+					root = wd
+				}
+				break
+			}
+			parent := filepath.Dir(wd)
+			if parent == wd {
+				break
+			}
+			wd = parent
+		}
+	}
+	if version == "" {
+		if info, ok := debug.ReadBuildInfo(); ok && info.Main.Path == frameworkModule && info.Main.Sum != "" {
+			version = info.Main.Version
+		} else {
+			version = minimumVersion
+		}
+	}
+	if !semver.IsValid(version) || semver.Major(version) != "v0" && semver.Major(version) != "v1" {
+		return nil, errors.New("invalid framework version")
+	}
+	if root == "" && semver.Compare(version, minimumVersion) < 0 {
+		return nil, fmt.Errorf("API generation needs %s or newer; use --framework-dir for unpublished source", minimumVersion)
+	}
+	text := "module " + o.Module + "\n\ngo 1.22.0\n\nrequire " + frameworkModule + " " + version + "\n"
+	if root != "" {
+		root = canonical(root)
+		data, err := os.ReadFile(filepath.Join(root, "go.mod"))
+		if err != nil {
+			return nil, err
+		}
+		mf, err := modfile.Parse("go.mod", data, nil)
+		if err != nil || mf.Module == nil || mf.Module.Mod.Path != frameworkModule {
+			return nil, errors.New("--framework-dir must contain go-omni")
+		}
+		if _, err = os.Stat(filepath.Join(root, "contract", "contract.go")); err != nil {
+			return nil, errors.New("local framework lacks API contract support")
+		}
+		relative, err := filepath.Rel(canonical(o.Dir), root)
+		if err != nil {
+			return nil, err
+		}
+		text += "\nreplace " + frameworkModule + " => " + strconv.Quote(filepath.ToSlash(relative)) + "\n"
+	}
+	return []byte(text), nil
+}
+func canonical(path string) string {
+	path, _ = filepath.Abs(path)
+	candidate := path
+	var tail []string
+	for {
+		if resolved, err := filepath.EvalSymlinks(candidate); err == nil {
+			for i := len(tail) - 1; i >= 0; i-- {
+				resolved = filepath.Join(resolved, tail[i])
+			}
+			return resolved
+		}
+		parent := filepath.Dir(candidate)
+		if parent == candidate {
+			return path
+		}
+		tail = append(tail, filepath.Base(candidate))
+		candidate = parent
+	}
+}
+
+func renderProject(o Options, c *Compiled, starter bool) (map[string][]byte, map[string][]byte, error) {
+	generated, seeds := map[string][]byte{}, map[string][]byte{}
+	put := func(files map[string][]byte, name, content string) { files[name] = []byte(content) }
+	if len(c.Spec.Errors) > 0 {
+		content := "package apierrors\nimport omnierrors " + strconv.Quote(frameworkModule+"/errors") + "\n"
+		for _, e := range c.Spec.Errors {
+			content += fmt.Sprintf("const Code%s = %q\n// %s returns a fresh public error declared in the API contract.\nfunc %s()*omnierrors.APIError{return omnierrors.New(%d,Code%s,%q)}\n", e.Name, e.Code, e.Name, e.Name, e.Status, e.Name, e.Message)
+		}
+		put(generated, "internal/apierrors/errorsGen.go", generatedHeader+content)
+	}
+	types := "package types\n\n"
+	if len(c.Spec.Scalars) > 0 {
+		types += "import("
+		for i, d := range c.Spec.Scalars {
+			types += fmt.Sprintf("scalar%d %q;", i, d.GoImport)
+		}
+		types += ")\n"
+		registry := fmt.Sprintf("package types\nimport %q\nfunc ContractScalars()[]contract.Scalar{return []contract.Scalar{", frameworkModule+"/contract")
+		for i, d := range c.Spec.Scalars {
+			types += fmt.Sprintf("type %s = scalar%d.%s\n", d.Name, i, d.GoType)
+			registry += fmt.Sprintf("contract.ScalarOf[%s](%q,%q,%t),", d.Name, d.JSONInput, d.JSONOutput, d.Text)
+		}
+		registry += "}}\n"
+		put(generated, "internal/types/scalarsGen.go", generatedHeader+registry)
+	}
+	for _, t := range c.Spec.Types {
+		types += "type " + t.Name + " struct {\n"
+		for _, f := range t.Fields {
+			types += fmt.Sprintf("%s %s `%s`\n", f.Name, f.Type, f.Tag)
+		}
+		types += "}\n"
+	}
+	put(generated, "internal/types/typesGen.go", generatedHeader+types)
+	put(generated, "docs/openapi.json", string(c.Document)+"\n")
+	put(generated, "internal/handler/openapiGen.go", generatedHeader+fmt.Sprintf("package handler\nimport (\"net/http\"; %q)\nconst OpenAPIDocument = %q\nfunc OpenAPI(c *httpx.Context) error { return c.WriteResponse(200,http.Header{\"Content-Type\": {\"application/json; charset=utf-8\"}},[]byte(OpenAPIDocument)) }\n", frameworkModule+"/httpx", string(c.Document)+"\n"))
+	policySource := fmt.Sprintf("package handler\nimport(\"encoding/json\";\"strings\";%q)\nvar responseTemplates=map[string]response.Encoder{\"\":response.Default(),\n", frameworkModule+"/response")
+	for _, definition := range c.Spec.Responses {
+		data, err := json.Marshal(definition.Config)
+		if err != nil {
+			return nil, nil, err
+		}
+		policySource += fmt.Sprintf("%q: newResponseTemplate(%q),\n", definition.Name, string(data))
+	}
+	policySource += "}\nfunc newResponseTemplate(raw string)response.Encoder{var cfg response.Config;decoder:=json.NewDecoder(strings.NewReader(raw));decoder.UseNumber();if err:=decoder.Decode(&cfg);err!=nil{panic(err)};return response.MustNew(cfg)}\nfunc responseEncoder(name string,raw bool)response.Encoder{encoder:=responseTemplates[name];if encoder==nil{panic(\"unknown response template\")};if raw{encoder=response.RawJSON(encoder)};return encoder}\n"
+	put(generated, "internal/handler/responseGen.go", generatedHeader+policySource)
+	imports := fmt.Sprintf("import (\"fmt\"; %q; %q; %q;", frameworkModule+"/httpx", frameworkModule+"/openapi", o.Module+"/internal/servicecontext")
+	routes := "func RegisterRoutes(router openapi.Registrar, deps *servicecontext.Context) error {\n if router==nil || deps==nil {return fmt.Errorf(\"router and dependencies required\")}\n"
+	if len(c.Spec.Scalars) > 0 {
+		imports += fmt.Sprintf("%q;%q;", frameworkModule+"/contract", o.Module+"/internal/types")
+		routes += "if err:=contract.ValidateScalars(types.ContractScalars()...);err!=nil{return err}\n"
+	}
+	middlewareSet := map[string]bool{}
+	for _, r := range c.Spec.Routes {
+		for _, m := range r.Middleware {
+			middlewareSet[m] = true
+		}
+	}
+	var middlewareNames []string
+	for m := range middlewareSet {
+		middlewareNames = append(middlewareNames, m)
+	}
+	sort.Strings(middlewareNames)
+	for _, m := range middlewareNames {
+		routes += fmt.Sprintf("if deps.Middlewares[%q]==nil {return fmt.Errorf(%q)}\n", m, "missing middleware "+m)
+	}
+	for i, group := range c.Groups {
+		imports += fmt.Sprintf("h%d %q; s%d %q;", i, o.Module+"/internal/handler/"+group, i, o.Module+"/internal/service/"+group)
+		routes += fmt.Sprintf("h%d := h%d.New(s%d.New(deps),deps)\n", i, i, i)
+		groupRoutes := []Route{}
+		for _, r := range c.Spec.Routes {
+			if r.Group == group {
+				groupRoutes = append(groupRoutes, r)
+			}
+		}
+		packageName := filepath.Base(group)
+		text := "package " + packageName + "\nimport(\"context\"; \"fmt\";"
+		needsTypes, needsBinder, hasAutomatic := false, false, false
+		for _, r := range groupRoutes {
+			if r.Manual {
+				continue
+			}
+			hasAutomatic = true
+			needsTypes = needsTypes || r.Request != "" || r.Response != ""
+			needsBinder = needsBinder || (r.Request != "" && !r.CustomBinding)
+		}
+		text += fmt.Sprintf("%q;%q;", frameworkModule+"/httpx", o.Module+"/internal/servicecontext")
+		if needsTypes {
+			text += fmt.Sprintf("%q;", o.Module+"/internal/types")
+		}
+		if needsBinder {
+			text += fmt.Sprintf("%q;", frameworkModule+"/contract")
+		}
+		text += ")\n"
+		text += "type Service interface {\n"
+		for _, r := range groupRoutes {
+			if !r.Manual {
+				text += signature(r) + "\n"
+			}
+		}
+		text += "}\ntype Handler struct {service Service;deps *servicecontext.Context}\nfunc New(s Service,deps ...*servicecontext.Context)*Handler {h:=&Handler{service:s};if len(deps)>0{h.deps=deps[0]};return h}\n"
+		for _, r := range groupRoutes {
+			name := upper(r.Handler)
+			// The response policy and body reader cap are installed before App middleware.
+			if r.MaxBodyBytes > 0 {
+				routes += fmt.Sprintf("httpx.HandleWithBodyLimit(router,%q,%q,%d,responseEncoder(%q,%t),h%d.%s", strings.ToUpper(r.Method), r.Path, r.MaxBodyBytes, responseName(r), r.ResponseFormat == "raw", i, name)
+			} else {
+				routes += fmt.Sprintf("httpx.HandleWithResponse(router,%q,%q,responseEncoder(%q,%t),h%d.%s", strings.ToUpper(r.Method), r.Path, responseName(r), r.ResponseFormat == "raw", i, name)
+			}
+			for _, m := range r.Middleware {
+				routes += fmt.Sprintf(",deps.Middlewares[%q]", m)
+			}
+			routes += ")\n"
+			if r.Manual {
+				put(seeds, "internal/handler/"+group+"/"+lower(r.Handler)+"Manual.go", fmt.Sprintf("package %s\nimport(%q;apierrors %q)\n// %s owns raw/multipart binding and response output. h.deps holds project dependencies.\n// This file is preserved on regeneration.\nfunc(h *Handler)%s(c *httpx.Context)error{return apierrors.New(501,\"NOT_IMPLEMENTED\",\"manual handler is not implemented\")}\n", packageName, frameworkModule+"/httpx", frameworkModule+"/errors", name, name))
+				continue
+			}
+			if r.Request != "" && !r.CustomBinding {
+				scalarArgs := ""
+				if len(c.Spec.Scalars) > 0 {
+					scalarArgs = "types.ContractScalars()..."
+				}
+				text += fmt.Sprintf("var %sRequest = contract.MustNew[types.%s](%s)\n", lower(r.Handler), r.Request, scalarArgs)
+			}
+			text += fmt.Sprintf("func(h *Handler) %s(c *httpx.Context)error {\n", name)
+			call := "c.Context()"
+			if r.Request != "" {
+				if r.CustomBinding {
+					text += fmt.Sprintf("var req types.%s\nif err:=h.bind%s(c,&req);err!=nil{return err}\n", r.Request, name)
+					put(seeds, "internal/handler/"+group+"/"+lower(r.Handler)+"Bind.go", fmt.Sprintf("package %s\nimport(%q;%q;apierrors %q)\n// bind%s is project-owned; repeated generation preserves it.\nfunc(h *Handler)bind%s(c *httpx.Context,req *types.%s)error{return apierrors.New(501,\"BINDING_NOT_IMPLEMENTED\",\"custom binding is not implemented\")}\n", packageName, frameworkModule+"/httpx", o.Module+"/internal/types", frameworkModule+"/errors", name, name, r.Request))
+				} else {
+					limit := ""
+					if r.MaxBodyBytes > 0 {
+						limit = fmt.Sprintf(",%d", r.MaxBodyBytes)
+					}
+					text += fmt.Sprintf("var req types.%s\nif err:=%sRequest.Bind(c.Request(),httpx.RouteParams(c.Context()),&req%s);err!=nil{return err}\n", r.Request, lower(r.Handler), limit)
+				}
+				call += ", &req"
+			}
+			if r.Response != "" {
+				text += fmt.Sprintf("resp,err:=h.service.%s(%s);if err!=nil{return err};if resp==nil{return fmt.Errorf(\"%s returned a nil response\")}\n", name, call, name)
+				method := map[int]string{200: "OK", 201: "Created", 202: "Accepted"}[r.Status]
+				text += "return c." + method + "(resp)\n}\n"
+			} else {
+				text += fmt.Sprintf("if err:=h.service.%s(%s);err!=nil{return err};return c.NoContent()\n}\n", name, call)
+			}
+			service := fmt.Sprintf("package %s\nimport(\"context\"; apierrors %q;", packageName, frameworkModule+"/errors")
+			if r.Request != "" || r.Response != "" {
+				service += fmt.Sprintf("%q;", o.Module+"/internal/types")
+			}
+			service += ")\n"
+			service += "// " + name + " implements the business operation. This file is never overwritten.\nfunc(s *Service) " + signature(r) + " {\n"
+			if starter && r.Handler == "greet" {
+				service = strings.Replace(service, "apierrors "+strconv.Quote(frameworkModule+"/errors")+";", "\"fmt\";", 1)
+				service += "s.deps.Logger.InfoContext(ctx,\"greet.called\")\nreturn &types.GreetResp{Message:fmt.Sprintf(\"Hello %s\",req.Name)},nil\n}"
+			} else {
+				service += "// TODO: implement business behavior and use s.deps for dependencies.\n"
+				if r.Response != "" {
+					service += "return nil, "
+				} else {
+					service += "return "
+				}
+				service += "apierrors.New(501,\"NOT_IMPLEMENTED\",\"operation is not implemented\")\n}"
+			}
+			put(seeds, "internal/service/"+group+"/"+lower(r.Handler)+".go", service)
+		}
+		if !hasAutomatic {
+			text = strings.Replace(text, strconv.Quote(frameworkModule+"/httpx")+";", "", 1)
+			text = strings.Replace(text, "\"context\";", "", 1)
+		}
+		if !hasResponse(groupRoutes) {
+			text = strings.Replace(text, "\"fmt\";", "", 1)
+		}
+		put(generated, "internal/handler/"+group+"/handlersGen.go", generatedHeader+text)
+		put(seeds, "internal/service/"+group+"/service.go", fmt.Sprintf("package %s\nimport %q\ntype Service struct {deps *servicecontext.Context}\nfunc New(deps *servicecontext.Context)*Service{return &Service{deps:deps}}\n", packageName, o.Module+"/internal/servicecontext"))
+		put(seeds, "internal/repository/"+group+"/repository.go", "// Package "+packageName+" owns persistence contracts for this business group.\n// Define repository interfaces and implementations here; HTTP DTOs do not\n// determine a database schema. This file is never overwritten.\npackage "+packageName+"\n")
+	}
+	put(generated, "internal/handler/routesGen.go", generatedHeader+"package handler\n"+imports+")\n"+routes+"return nil\n}\n")
+	registry := "package middleware\nimport " + strconv.Quote(frameworkModule+"/httpx") + "\nfunc Defaults()map[string]httpx.Middleware{return map[string]httpx.Middleware{\n"
+	for _, m := range middlewareNames {
+		registry += fmt.Sprintf("%q:%s,\n", m, upper(m))
+		put(seeds, "internal/middleware/"+lower(m)+".go", fmt.Sprintf("package middleware\nimport(%q; apierrors %q)\n// %s is a developer-owned hook. Implement it before enabling this route.\nfunc %s(next httpx.Handler)httpx.Handler{return func(c *httpx.Context)error {return apierrors.New(501,\"MIDDLEWARE_NOT_IMPLEMENTED\",\"middleware is not implemented\")}}\n", frameworkModule+"/httpx", frameworkModule+"/errors", upper(m), upper(m)))
+	}
+	put(generated, "internal/middleware/registryGen.go", generatedHeader+registry+"}}\n")
+	for name, source := range baseTemplates {
+		content := strings.ReplaceAll(source, "MODULE", o.Module)
+		content = strings.ReplaceAll(content, "LOGFORMAT", o.LogFormat)
+		content = strings.ReplaceAll(content, "LOGOUTPUT", o.LogOutput)
+		if name == "etc/config.yaml" && o.LogOutput == "file" {
+			content = strings.Replace(content, "output: file", "output: stderr\n    file: ./var/log/server.log\n    rotation:\n      enabled: true\n      maxSizeMb: 100\n      maxBackups: 10\n      maxAgeDays: 7\n      compress: true", 1)
+		}
+		put(seeds, name, content)
+	}
+
+	infra, err := scaffold.APIInfrastructure(o.Module, o.Database, o.Storage, o.LogOutput, o.LogFormat)
+	if err != nil {
+		return nil, nil, err
+	}
+	for name, data := range infra {
+		seeds[name] = data
+	}
+	if o.Storage == "local" {
+		for _, r := range c.Spec.Routes {
+			if r.Path == "/storage/object" {
+				return nil, nil, errors.New("/storage/object is reserved by local storage")
+			}
+		}
+		main := string(seeds["cmd/server/main.go"])
+		main = strings.Replace(main, " if err=handler.RegisterRoutes", ` for _,method:=range []string{"GET","HEAD","PUT"}{app.Handle(method,"/storage/object",func(c *httpx.Context)error{deps.FileHTTP.ServeHTTP(c.Raw(),c.Request());return nil})}
+ if err=handler.RegisterRoutes`, 1)
+		main = strings.Replace(main, `"git.yuntuo.hk/k2safe/go-omni/logx"`, `"git.yuntuo.hk/k2safe/go-omni/logx"; "git.yuntuo.hk/k2safe/go-omni/httpx"`, 1)
+		seeds["cmd/server/main.go"] = []byte(main)
+	}
+	return generated, seeds, nil
+}
+func hasResponse(routes []Route) bool {
+	for _, r := range routes {
+		if r.Response != "" && !r.Manual {
+			return true
+		}
+	}
+	return false
+}
+func signature(r Route) string {
+	s := upper(r.Handler) + "(ctx context.Context"
+	if r.Request != "" {
+		s += ",req *types." + r.Request
+	}
+	s += ") "
+	if r.Response != "" {
+		s += "(*types." + r.Response + ",error)"
+	} else {
+		s += "error"
+	}
+	return s
+}

cmd/go-omni/apigen/metadata_test.go

@@ -0,0 +1,305 @@
+package apigen
+
+import (
+	"context"
+	"encoding/json"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+	"testing"
+	"time"
+)
+
+const declaredAPI = `syntax = "v1"
+info (
+ title: "Declared API"
+ description: "Errors and authentication share one contract"
+)
+error (
+ Unauthenticated 401 "UNAUTHENTICATED" "authentication required"
+ Forbidden 403 "FORBIDDEN" "permission denied"
+ EmailTaken 409 "EMAIL_TAKEN" "email already in use"
+ NameTaken 409 "NAME_TAKEN" "name already in use"
+)
+auth UserAuth (
+ type: bearer
+ middleware: Auth
+ description: "Verified application token"
+)
+auth PartnerAuth (
+ type: apiKey
+ in: header
+ name: X-API-Key
+ middleware: Partner
+)
+auth SessionAuth (
+ type: apiKey
+ in: cookie
+ name: sessionId
+ middleware: Session
+)
+@server (
+ group: user
+ auth: UserAuth
+ errors: Unauthenticated
+ middleware: Audit
+)
+service declared-api {
+ @doc (
+  summary: "Create a user"
+  description: "Uniqueness is enforced in a transaction"
+  tags: users, administration
+  deprecated: true
+ )
+ @errors Forbidden, EmailTaken, NameTaken
+ @handler create
+ post /users
+ @auth none
+ @errors none
+ @handler public
+ get /public
+ @auth PartnerAuth
+ @handler partner
+ get /partner
+ @auth SessionAuth
+ @handler session
+ get /session
+}
+`
+
+func document(t *testing.T, c *Compiled) map[string]any {
+	t.Helper()
+	var doc map[string]any
+	if err := json.Unmarshal(c.Document, &doc); err != nil {
+		t.Fatal(err)
+	}
+	return doc
+}
+func operation(t *testing.T, doc map[string]any, path, method string) map[string]any {
+	t.Helper()
+	return doc["paths"].(map[string]any)[path].(map[string]any)[method].(map[string]any)
+}
+func TestDeclaredErrorsAndAuthentication(t *testing.T) {
+	spec, err := parseText(t, declaredAPI)
+	if err != nil {
+		t.Fatal(err)
+	}
+	c, err := Compile(spec)
+	if err != nil {
+		t.Fatal(err)
+	}
+	again, err := Compile(spec)
+	if err != nil || string(c.Document) != string(again.Document) {
+		t.Fatalf("compile is not repeatable: %v", err)
+	}
+	if strings.Join(spec.Routes[0].Middleware, ",") != "Audit" {
+		t.Fatal("parser output mutated")
+	}
+	if strings.Join(c.Spec.Routes[0].Middleware, ",") != "Auth,Audit" {
+		t.Fatal("authentication must be first")
+	}
+	if strings.Join(c.Spec.Routes[1].Middleware, ",") != "Audit" {
+		t.Fatal("public override retained automatic auth")
+	}
+	doc := document(t, c)
+	op := operation(t, doc, "/users", "post")
+	if op["deprecated"] != true || op["description"] == nil || len(op["tags"].([]any)) != 2 {
+		t.Fatalf("documentation missing: %v", op)
+	}
+	security := op["security"].([]any)
+	if _, ok := security[0].(map[string]any)["UserAuth"]; !ok {
+		t.Fatal("security requirement absent")
+	}
+	schemes := doc["components"].(map[string]any)["securitySchemes"].(map[string]any)
+	if len(schemes) != 3 || schemes["UserAuth"].(map[string]any)["scheme"] != "bearer" || schemes["SessionAuth"].(map[string]any)["in"] != "cookie" {
+		t.Fatalf("wrong security schemes: %v", schemes)
+	}
+	responses := op["responses"].(map[string]any)
+	for _, status := range []string{"401", "403", "409"} {
+		if responses[status] == nil {
+			t.Fatal("missing status " + status)
+		}
+	}
+	media := responses["409"].(map[string]any)["content"].(map[string]any)["application/json"].(map[string]any)
+	if len(media["examples"].(map[string]any)) != 2 {
+		t.Fatal("same-status errors were overwritten")
+	}
+	codes := media["schema"].(map[string]any)["properties"].(map[string]any)["code"].(map[string]any)["enum"].([]any)
+	if len(codes) != 2 {
+		t.Fatal("business code enum absent")
+	}
+	public := operation(t, doc, "/public", "get")
+	if len(public["security"].([]any)) != 0 || public["responses"].(map[string]any)["401"] != nil || public["x-omni-errors"] != nil {
+		t.Fatal("public overrides did not clear group declarations")
+	}
+}
+func TestInvalidDeclarations(t *testing.T) {
+	replacements := [][2]string{
+		{`"EMAIL_TAKEN"`, `"UNAUTHENTICATED"`},
+		{`EmailTaken 409`, `EmailTaken 200`},
+		{`EmailTaken 409`, `emailTaken 409`},
+		{`NameTaken 409`, `CodeEmailTaken 409`},
+		{`auth: UserAuth`, `auth: Unknown`},
+		{`errors: Unauthenticated`, `errors: Unknown`},
+		{`middleware: Audit`, `middleware: Auth`},
+		{`type: bearer`, `type: oauth2`},
+		{`in: header`, `in: query`},
+		{`name: X-API-Key`, `name: Authorization`},
+		{`deprecated: true`, `deprecated: yes`},
+		{`tags: users, administration`, `tags: users, users`},
+		{`@errors Forbidden, EmailTaken, NameTaken`, `@errors Forbidden, Forbidden`},
+		{`middleware: Auth`, `middleware: Defaults`},
+	}
+	for _, change := range replacements {
+		spec, err := parseText(t, strings.Replace(declaredAPI, change[0], change[1], 1))
+		if err == nil {
+			_, err = Compile(spec)
+		}
+		if err == nil {
+			t.Fatalf("accepted invalid %q", change[1])
+		}
+		if !strings.Contains(err.Error(), "service.api:") {
+			t.Fatalf("source position missing: %v", err)
+		}
+	}
+}
+func TestImportedErrorCatalog(t *testing.T) {
+	root := t.TempDir()
+	writeFile(t, filepath.Join(root, "errors.api"), `error Conflict 409 "CONFLICT" "conflict"`)
+	writeFile(t, filepath.Join(root, "service.api"), "import \"errors.api\"\nservice imported-api { @errors Conflict\n @handler create\n post /users\n }")
+	spec, err := Parse(filepath.Join(root, "service.api"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	if _, err = Compile(spec); err != nil {
+		t.Fatal(err)
+	}
+}
+func TestDryRunAndEntryDiscovery(t *testing.T) {
+	root := t.TempDir()
+	source := filepath.Join(root, "input/service.api")
+	writeFile(t, source, declaredAPI)
+	dir := filepath.Join(root, "project")
+	o := Options{API: source, Dir: dir, Module: "example.com/dx", FrameworkDir: frameworkRoot(t), DryRun: true}
+	out, err := Generate(o)
+	if err != nil || len(out.Changes) == 0 {
+		t.Fatalf("empty plan: %v", err)
+	}
+	if _, err = os.Stat(dir); !os.IsNotExist(err) {
+		t.Fatal("dry-run created directory")
+	}
+	o.DryRun = false
+	if _, err = Generate(o); err != nil {
+		t.Fatal(err)
+	}
+	entry, err := ProjectEntry(dir)
+	if err != nil || entry != filepath.Join(dir, "api/service.api") {
+		t.Fatalf("entry: %s %v", entry, err)
+	}
+	o = Options{API: entry, Dir: dir, DryRun: true}
+	before := snapshot(t, dir)
+	out, err = Generate(o)
+	if err != nil || len(out.Changes) != 0 {
+		t.Fatalf("unchanged project plan: %v %+v", err, out.Changes)
+	}
+	writeFile(t, entry, strings.Replace(declaredAPI, "email already in use", "email is already registered", 1))
+	before = snapshot(t, dir)
+	out, err = Generate(o)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !sameFiles(before, snapshot(t, dir)) {
+		t.Fatal("dry-run changed project")
+	}
+	actions := map[string]string{}
+	for _, c := range out.Changes {
+		actions[c.Path] = c.Action
+	}
+	if actions["internal/apierrors/errorsGen.go"] != "update" || actions["docs/openapi.json"] != "update" {
+		t.Fatalf("missing plan: %v", actions)
+	}
+	o.Check = true
+	if _, err = Generate(o); err == nil {
+		t.Fatal("check and dry-run combined")
+	}
+	// A malformed manifest cannot redirect the shorthand outside its project.
+	writeFile(t, filepath.Join(dir, manifestPath), `{"version":1,"entry":"../input/service.api"}`)
+	if _, err = ProjectEntry(dir); err == nil {
+		t.Fatal("unsafe manifest entry accepted")
+	}
+}
+
+func TestDeclaredContractConsumer(t *testing.T) {
+	if os.Getenv("GO_OMNI_SCAFFOLD_INTEGRATION") == "" {
+		t.Skip("consumer integration")
+	}
+	root := t.TempDir()
+	source := filepath.Join(root, "input/service.api")
+	writeFile(t, source, declaredAPI)
+	dir := filepath.Join(root, "project")
+	if _, err := Generate(Options{API: source, Dir: dir, Module: "example.com/dx", FrameworkDir: frameworkRoot(t)}); err != nil {
+		t.Fatal(err)
+	}
+	writeFile(t, filepath.Join(dir, "contract_test.go"), declaredConsumerTest)
+	ctx, cancel := context.WithTimeout(context.Background(), 90*time.Second)
+	defer cancel()
+	cmd := exec.CommandContext(ctx, "go", "test", "-mod=mod", "-race", "-count=1", "./...")
+	cmd.Dir = dir
+	cmd.Env = append(os.Environ(), "GOWORK=off", "GOFLAGS=")
+	if out, err := cmd.CombinedOutput(); err != nil {
+		t.Fatalf("consumer: %v\n%s", err, out)
+	}
+}
+
+const declaredConsumerTest = `package dx_test
+import (
+ "context";"errors";"io";"net/http/httptest";"strings";"testing"
+ omni "git.yuntuo.hk/k2safe/go-omni"
+ "git.yuntuo.hk/k2safe/go-omni/httpx"
+ "git.yuntuo.hk/k2safe/go-omni/logx"
+ "example.com/dx/internal/apierrors"
+ "example.com/dx/internal/handler"
+ "example.com/dx/internal/servicecontext"
+)
+func TestRuntimeAuthAndFreshErrors(t *testing.T){
+ first:=apierrors.EmailTaken().WithCause(errors.New("private"));second:=apierrors.EmailTaken()
+ if first==second||second.Cause!=nil||second.Code!=apierrors.CodeEmailTaken||second.Status!=409{t.Fatal("shared error instance")}
+ cfg:=logx.Default();cfg.Writer=io.Discard;logger,err:=logx.New(cfg);if err!=nil{t.Fatal(err)};defer logger.Close()
+ deps,err:=servicecontext.New(context.Background(),logger);if err!=nil{t.Fatal(err)};defer deps.Close()
+ app:=omni.New();defer app.Close();if err=handler.RegisterRoutes(app,deps);err!=nil{t.Fatal(err)}
+ w:=httptest.NewRecorder();app.Engine().ServeHTTP(w,httptest.NewRequest("POST","/users",nil))
+ if w.Code!=501||!strings.Contains(w.Body.String(),"MIDDLEWARE_NOT_IMPLEMENTED"){t.Fatal("unimplemented auth did not fail closed")}
+ var called []string
+ deps.Middlewares["Auth"]=func(next httpx.Handler)httpx.Handler{return func(c *httpx.Context)error{called=append(called,"auth");if c.Header("Authorization")!="Bearer valid"{return apierrors.Unauthenticated()};return next(c)}}
+ deps.Middlewares["Audit"]=func(next httpx.Handler)httpx.Handler{return func(c *httpx.Context)error{called=append(called,"audit");return next(c)}}
+ app2:=omni.New();defer app2.Close();if err=handler.RegisterRoutes(app2,deps);err!=nil{t.Fatal(err)}
+ w=httptest.NewRecorder();app2.Engine().ServeHTTP(w,httptest.NewRequest("POST","/users",nil))
+ if w.Code!=401||strings.Join(called,",")!="auth"{t.Fatal("unauthenticated request reached other middleware")}
+ called=nil;req:=httptest.NewRequest("POST","/users",nil);req.Header.Set("Authorization","Bearer valid")
+ w=httptest.NewRecorder();app2.Engine().ServeHTTP(w,req)
+ if w.Code!=501||strings.Join(called,",")!="auth,audit"{t.Fatal("middleware order changed")}
+ called=nil;w=httptest.NewRecorder();app2.Engine().ServeHTTP(w,httptest.NewRequest("GET","/public",nil))
+ if w.Code!=501||strings.Join(called,",")!="audit"||strings.Contains(w.Body.String(),"MIDDLEWARE_NOT_IMPLEMENTED"){t.Fatal("public override retained auth")}
+ delete(deps.Middlewares,"Auth");app3:=omni.New();defer app3.Close()
+ if err=handler.RegisterRoutes(app3,deps);err==nil{t.Fatal("missing auth registration accepted")}
+ w=httptest.NewRecorder();app3.Engine().ServeHTTP(w,httptest.NewRequest("GET","/public",nil))
+ if w.Code!=404{t.Fatal("failed auth preflight registered partial routes")}
+}
+`
+
+func TestAuthMetadataWithParameterNamePrefixes(t *testing.T) {
+	source := "type Req {\n ID int `path:\"id\"`\n IDLong int `path:\"idLong\"`\n}\nauth Gate (\n type: bearer\n middleware: Auth\n)\n@server (auth: Gate)\nservice prefix-api {\n @handler read\n get /items/:id/children/:idLong (Req)\n}"
+	spec, err := parseText(t, source)
+	if err != nil {
+		t.Fatal(err)
+	}
+	c, err := Compile(spec)
+	if err != nil {
+		t.Fatal(err)
+	}
+	op := operation(t, document(t, c), "/items/{id}/children/{idLong}", "get")
+	if len(op["security"].([]any)) != 1 {
+		t.Fatal("auth metadata lost")
+	}
+}

cmd/go-omni/apigen/parse.go

@@ -0,0 +1,570 @@
+// Package apigen implements go-omni's deliberately bounded go-zero-style API
+// dialect. It generates Omni handlers, never go-zero or transport dependencies.
+package apigen
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"strconv"
+	"strings"
+	"text/scanner"
+)
+
+type Spec struct {
+	Title, Version, Service, Description string
+	Errors                               []ErrorDefinition
+	Auth                                 []AuthDefinition
+	Responses                            []ResponseDefinition
+	Scalars                              []ScalarDefinition
+	Types                                []Type
+	Routes                               []Route
+	Sources                              map[string][]byte // relative to the entry API's directory
+	Entry                                string
+}
+type Type struct {
+	Name     string
+	Fields   []Field
+	Position string
+}
+type Field struct{ Name, Type, Tag string }
+type Route struct {
+	Manual, CustomBinding                                    bool
+	BodyMode, Produces                                       string
+	MaxBodyBytes                                             int64
+	Method, Path, Request, Response, Handler, Group, Summary string
+	Middleware                                               []string
+	Auth                                                     string
+	ResponseFormat                                           string
+	ErrorResponseFormat                                      string
+	Errors                                                   []string
+	Description                                              string
+	Tags                                                     []string
+	Deprecated                                               bool
+	Status                                                   int
+	Position                                                 string
+}
+type token struct {
+	text, position string
+	kind           rune
+	space          bool
+}
+type parser struct {
+	tokens  []token
+	at      int
+	spec    *Spec
+	imports []string
+}
+
+func Parse(path string) (*Spec, error) {
+	entry, err := filepath.Abs(path)
+	if err != nil {
+		return nil, err
+	}
+	entry, err = filepath.EvalSymlinks(entry)
+	if err != nil {
+		return nil, err
+	}
+	root := filepath.Dir(entry)
+	spec := &Spec{Version: "1.0.0", Sources: map[string][]byte{}, Entry: filepath.Base(entry)}
+	visiting, visited := map[string]bool{}, map[string]bool{}
+	total := 0
+	var visit func(string, int) error
+	visit = func(name string, depth int) error {
+		if depth > 32 || len(visited)+len(visiting) >= 64 {
+			return errors.New("api: import limit exceeded")
+		}
+		real, err := filepath.EvalSymlinks(name)
+		if err != nil {
+			return err
+		}
+		rel, err := filepath.Rel(root, real)
+		if err != nil || rel == ".." || strings.HasPrefix(rel, ".."+string(filepath.Separator)) {
+			return errors.New("api: imports must stay within the entry API directory")
+		}
+		if filepath.Ext(real) != ".api" {
+			return errors.New("api: expected .api file")
+		}
+		if visiting[real] {
+			return fmt.Errorf("api: circular import %s", rel)
+		}
+		if visited[real] {
+			return nil
+		}
+		visiting[real] = true
+		defer delete(visiting, real)
+		f, err := os.Open(real)
+		if err != nil {
+			return err
+		}
+		data, err := io.ReadAll(io.LimitReader(f, (1<<20)+1))
+		_ = f.Close()
+		if err != nil {
+			return err
+		}
+		total += len(data)
+		if len(data) > 1<<20 || total > 8<<20 {
+			return errors.New("api: source size limit exceeded")
+		}
+		tokens, err := lex(rel, string(data))
+		if err != nil {
+			return err
+		}
+		p := &parser{tokens: tokens, spec: spec}
+		if err = p.parse(); err != nil {
+			return err
+		}
+		spec.Sources[filepath.ToSlash(rel)] = data
+		for _, imp := range p.imports {
+			if filepath.IsAbs(imp) || strings.Contains(imp, "\\") {
+				return errors.New("api: imports must use relative slash paths")
+			}
+			if err = visit(filepath.Join(filepath.Dir(real), filepath.FromSlash(imp)), depth+1); err != nil {
+				return err
+			}
+		}
+		visited[real] = true
+		return nil
+	}
+	if err = visit(entry, 0); err != nil {
+		return nil, err
+	}
+	if spec.Service == "" || len(spec.Routes) == 0 {
+		return nil, errors.New("api: at least one service route required")
+	}
+	if spec.Title == "" {
+		spec.Title = spec.Service
+	}
+	return spec, nil
+}
+func lex(name, source string) ([]token, error) {
+	var s scanner.Scanner
+	s.Init(strings.NewReader(source))
+	s.Filename = name
+	s.Mode = scanner.ScanIdents | scanner.ScanInts | scanner.ScanStrings | scanner.ScanRawStrings | scanner.ScanComments | scanner.SkipComments
+	s.Whitespace ^= 1 << '\n'
+	var scanErr error
+	s.Error = func(s *scanner.Scanner, message string) {
+		if scanErr == nil {
+			scanErr = fmt.Errorf("%s: %s", s.Position, message)
+		}
+	}
+	var out []token
+	end := 0
+	for {
+		kind := s.Scan()
+		out = append(out, token{s.TokenText(), s.Position.String(), kind, s.Position.Offset > end})
+		end = s.Position.Offset + len(s.TokenText())
+		if kind == scanner.EOF {
+			break
+		}
+	}
+	return out, scanErr
+}
+func (p *parser) peek() string { return p.tokens[p.at].text }
+func (p *parser) next() token {
+	t := p.tokens[p.at]
+	if t.kind != scanner.EOF {
+		p.at++
+	}
+	return t
+}
+func (p *parser) skip() {
+	for p.peek() == "\n" || p.peek() == ";" {
+		p.next()
+	}
+}
+func (p *parser) err(message string) error {
+	return fmt.Errorf("%s: %s (got %q)", p.tokens[p.at].position, message, p.peek())
+}
+func (p *parser) expect(s string) error {
+	if p.peek() != s {
+		return p.err("expected " + strconv.Quote(s))
+	}
+	p.next()
+	return nil
+}
+func (p *parser) ident() (string, error) {
+	if p.tokens[p.at].kind != scanner.Ident {
+		return "", p.err("expected identifier")
+	}
+	return p.next().text, nil
+}
+func (p *parser) quoted() (string, error) {
+	if p.tokens[p.at].kind != scanner.String {
+		return "", p.err("expected quoted string")
+	}
+	return strconv.Unquote(p.next().text)
+}
+func (p *parser) parse() error {
+	server := map[string]string{}
+	syntaxSeen := false
+	for p.skip(); p.tokens[p.at].kind != scanner.EOF; p.skip() {
+		switch p.peek() {
+		case "scalar":
+			if err := p.parseScalar(); err != nil {
+				return err
+			}
+		case "syntax":
+			if syntaxSeen {
+				return p.err("duplicate syntax")
+			}
+			syntaxSeen = true
+			p.next()
+			if err := p.expect("="); err != nil {
+				return err
+			}
+			v, err := p.quoted()
+			if err != nil {
+				return err
+			}
+			if v != "v1" {
+				return p.err("only syntax v1 supported")
+			}
+		case "info":
+			p.next()
+			m, err := p.metadata()
+			if err != nil {
+				return err
+			}
+			if _, a := m["desc"]; a {
+				if _, b := m["description"]; b {
+					return p.err("use only one of info desc and description")
+				}
+			}
+			for k, v := range m {
+				switch k {
+				case "title":
+					p.spec.Title = v
+				case "version":
+					p.spec.Version = v
+				case "desc", "description":
+					p.spec.Description = v
+				case "author", "email":
+				default:
+					return p.err("unsupported info property " + k)
+				}
+			}
+		case "import":
+			p.next()
+			if p.peek() == "(" {
+				p.next()
+				for p.skip(); p.peek() != ")"; p.skip() {
+					v, err := p.quoted()
+					if err != nil {
+						return err
+					}
+					p.imports = append(p.imports, v)
+				}
+				p.next()
+			} else {
+				v, err := p.quoted()
+				if err != nil {
+					return err
+				}
+				p.imports = append(p.imports, v)
+			}
+		case "error":
+			if err := p.parseErrors(); err != nil {
+				return err
+			}
+		case "auth":
+			if err := p.parseAuth(); err != nil {
+				return err
+			}
+		case "response":
+			if err := p.parseResponse(); err != nil {
+				return err
+			}
+		case "type":
+			p.next()
+			if p.peek() == "(" {
+				p.next()
+				for p.skip(); p.peek() != ")"; p.skip() {
+					if err := p.parseType(); err != nil {
+						return err
+					}
+				}
+				p.next()
+			} else {
+				if err := p.parseType(); err != nil {
+					return err
+				}
+			}
+		case "@":
+			p.next()
+			if err := p.expect("server"); err != nil {
+				return err
+			}
+			if len(server) != 0 {
+				return p.err("duplicate server block")
+			}
+			m, err := p.metadata()
+			if err != nil {
+				return err
+			}
+			server = m
+			for k := range m {
+				if k != "prefix" && k != "group" && k != "middleware" && k != "auth" && k != "errors" && k != "response" {
+					return p.err("unsupported @server option " + k + "; wire authentication through named middleware")
+				}
+			}
+		case "service":
+			if err := p.parseService(server); err != nil {
+				return err
+			}
+			server = map[string]string{}
+		default:
+			return p.err("unsupported declaration")
+		}
+	}
+	if len(server) > 0 {
+		return p.err("@server must precede a service")
+	}
+	return nil
+}
+func (p *parser) metadata() (map[string]string, error) {
+	if err := p.expect("("); err != nil {
+		return nil, err
+	}
+	out := map[string]string{}
+	for p.skip(); p.peek() != ")"; p.skip() {
+		key, err := p.ident()
+		if err != nil {
+			return nil, err
+		}
+		if err = p.expect(":"); err != nil {
+			return nil, err
+		}
+		value := ""
+		if p.tokens[p.at].kind == scanner.String {
+			value, err = p.quoted()
+			if err != nil {
+				return nil, err
+			}
+		} else if p.peek() == "{" {
+			depth := 0
+			var object strings.Builder
+			for {
+				t := p.next()
+				if t.kind == scanner.EOF {
+					return nil, p.err("unterminated metadata object")
+				}
+				if t.text == "{" {
+					depth++
+				}
+				if t.text == "}" {
+					depth--
+				}
+				if t.space {
+					object.WriteByte(' ')
+				}
+				object.WriteString(t.text)
+				if depth == 0 {
+					break
+				}
+			}
+			value = object.String()
+		} else {
+			for p.peek() != "\n" && p.peek() != ";" && p.peek() != ")" && p.tokens[p.at].kind != scanner.EOF {
+				value += p.next().text
+			}
+		}
+		if value == "" {
+			return nil, p.err("metadata value required")
+		}
+		if _, exists := out[key]; exists {
+			return nil, p.err("duplicate metadata " + key)
+		}
+		out[key] = value
+	}
+	p.next()
+	return out, nil
+}
+func (p *parser) parseType() error {
+	pos := p.tokens[p.at].position
+	name, err := p.ident()
+	if err != nil {
+		return err
+	}
+	p.skip()
+	if err = p.expect("{"); err != nil {
+		return err
+	}
+	typ := Type{Name: name, Position: pos}
+	for p.skip(); p.peek() != "}"; p.skip() {
+		name, err := p.ident()
+		if err != nil {
+			return err
+		}
+		expression := ""
+		for p.peek() != "\n" && p.peek() != ";" && p.peek() != "}" && p.tokens[p.at].kind != scanner.RawString && p.tokens[p.at].kind != scanner.EOF {
+			if p.peek() == "interface" {
+				p.next()
+				if p.expect("{") != nil || p.expect("}") != nil {
+					return p.err("only empty interface{} is supported; use any for dynamic JSON")
+				}
+				expression += "any"
+			} else {
+				expression += p.next().text
+			}
+		}
+		if expression == "" {
+			return p.err("field type required; embedded types are not supported")
+		}
+		if p.tokens[p.at].kind != scanner.RawString {
+			return p.err("field source tag required")
+		}
+		tag, err := strconv.Unquote(p.next().text)
+		if err != nil {
+			return err
+		}
+		typ.Fields = append(typ.Fields, Field{Name: name, Type: expression, Tag: tag})
+	}
+	p.next()
+	p.spec.Types = append(p.spec.Types, typ)
+	return nil
+}
+func (p *parser) parseService(server map[string]string) error {
+	p.next()
+	name, err := p.ident()
+	if err != nil {
+		return err
+	}
+	for p.peek() == "-" {
+		p.next()
+		part, e := p.ident()
+		if e != nil {
+			return e
+		}
+		name += "-" + part
+	}
+	if p.spec.Service != "" && p.spec.Service != name {
+		return p.err("one service name per entry API is supported")
+	}
+	p.spec.Service = name
+	p.skip()
+	if err = p.expect("{"); err != nil {
+		return err
+	}
+	for p.skip(); p.peek() != "}"; p.skip() {
+		route := Route{ResponseFormat: server["response"], Auth: server["auth"], Errors: commaList(server["errors"]), Group: server["group"], Status: 200, Position: p.tokens[p.at].position}
+		if route.Group == "" {
+			route.Group = "api"
+		}
+		if server["middleware"] != "" {
+			route.Middleware = strings.Split(server["middleware"], ",")
+		}
+		seen := map[string]bool{}
+		for p.peek() == "@" {
+			p.next()
+			annotation, e := p.ident()
+			if e != nil {
+				return e
+			}
+			if seen[annotation] {
+				return p.err("duplicate route annotation")
+			}
+			seen[annotation] = true
+			switch annotation {
+			case "handlerMode":
+				mode, err := p.ident()
+				if err != nil {
+					return err
+				}
+				if mode != "manual" {
+					return p.err("handlerMode must be manual")
+				}
+				route.Manual = true
+			case "binding":
+				mode, err := p.ident()
+				if err != nil {
+					return err
+				}
+				if mode != "custom" {
+					return p.err("binding must be custom")
+				}
+				route.CustomBinding = true
+			case "produces":
+				route.Produces, e = p.quoted()
+			case "body":
+				e = p.parseBody(&route)
+			case "handler":
+				route.Handler, e = p.ident()
+			case "doc":
+				e = p.parseDoc(&route)
+			case "auth":
+				route.Auth, e = p.ident()
+			case "response":
+				var format string
+				format, e = p.ident()
+				if format == "raw" && route.ResponseFormat != "raw" {
+					route.ErrorResponseFormat = route.ResponseFormat
+				}
+				route.ResponseFormat = format
+			case "errors":
+				var names []string
+				names, e = p.names()
+				if len(names) == 1 && names[0] == "none" {
+					route.Errors = nil
+				} else {
+					route.Errors = mergeNames(route.Errors, names)
+				}
+			case "status":
+				route.Status, e = strconv.Atoi(p.next().text)
+			default:
+				return p.err("unsupported route annotation " + annotation)
+			}
+			if e != nil {
+				return e
+			}
+			p.skip()
+		}
+		if route.Handler == "" {
+			return p.err("@handler required")
+		}
+		route.Method, err = p.ident()
+		if err != nil {
+			return err
+		}
+		path := ""
+		for p.peek() != "\n" && p.peek() != ";" && p.peek() != "(" && p.peek() != "returns" && p.peek() != "}" && p.tokens[p.at].kind != scanner.EOF {
+			path += p.next().text
+		}
+		route.Path = server["prefix"] + path
+		if p.peek() == "(" {
+			route.Request, err = p.routeType()
+			if err != nil {
+				return err
+			}
+		}
+		if p.peek() == "returns" {
+			p.next()
+			route.Response, err = p.routeType()
+			if err != nil {
+				return err
+			}
+		}
+		if p.peek() != "\n" && p.peek() != ";" && p.peek() != "}" {
+			return p.err("unexpected route suffix")
+		}
+		if route.Response == "" && !seen["status"] && !route.Manual {
+			route.Status = 204
+		}
+		p.spec.Routes = append(p.spec.Routes, route)
+	}
+	p.next()
+	return nil
+}
+func (p *parser) routeType() (string, error) {
+	if err := p.expect("("); err != nil {
+		return "", err
+	}
+	name, err := p.ident()
+	if err != nil {
+		return "", err
+	}
+	return name, p.expect(")")
+}

cmd/go-omni/apigen/profile.go

@@ -0,0 +1,73 @@
+package apigen
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+)
+
+type projectProfile struct {
+	Database  string `json:"database"`
+	Storage   string `json:"storage"`
+	LogOutput string `json:"logOutput"`
+	LogFormat string `json:"logFormat"`
+}
+
+func (o Options) profile() projectProfile {
+	return projectProfile{o.Database, o.Storage, o.LogOutput, o.LogFormat}
+}
+
+// Infrastructure files belong to the developer. Persist the original selection
+// so a plain regeneration cannot silently change adapters or repair a missing
+// file with settings from another profile.
+func resolveProfile(o *Options) error {
+	defaults := projectProfile{"none", "none", "stderr", "json"}
+	data, err := os.ReadFile(filepath.Join(o.Dir, manifestPath))
+	if err != nil && !errors.Is(err, os.ErrNotExist) {
+		return err
+	}
+	existing := err == nil
+	if existing {
+		var previous manifest
+		if err = json.Unmarshal(data, &previous); err != nil {
+			return err
+		}
+		if previous.Profile != nil {
+			defaults = *previous.Profile
+		}
+	}
+	if o.Database == "memory" {
+		o.Database = "none"
+	}
+	for _, item := range []struct {
+		name     string
+		value    *string
+		fallback string
+	}{
+		{"database", &o.Database, defaults.Database}, {"storage", &o.Storage, defaults.Storage},
+		{"log-output", &o.LogOutput, defaults.LogOutput}, {"log-format", &o.LogFormat, defaults.LogFormat},
+	} {
+		if *item.value == "" {
+			*item.value = item.fallback
+		} else if existing && *item.value != item.fallback {
+			return fmt.Errorf("--%s differs from the original project profile; infrastructure is developer-owned, generate a new project to compare and migrate it explicitly", item.name)
+		}
+	}
+	if o.Database != "none" && o.Database != "mysql" {
+		return errors.New("--database must be none, memory or mysql")
+	}
+	switch o.Storage {
+	case "none", "local", "s3", "r2", "oss":
+	default:
+		return errors.New("--storage must be none, local, s3, r2 or oss")
+	}
+	if o.LogOutput != "stderr" && o.LogOutput != "stdout" && o.LogOutput != "file" {
+		return errors.New("--log-output must be stdout, stderr or file")
+	}
+	if o.LogFormat != "json" && o.LogFormat != "text" {
+		return errors.New("--log-format must be json or text")
+	}
+	return nil
+}

cmd/go-omni/apigen/profile_test.go

@@ -0,0 +1,98 @@
+package apigen
+
+import (
+	"context"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+	"testing"
+	"time"
+)
+
+func TestInfrastructureProfileOwnership(t *testing.T) {
+	dir := filepath.Join(t.TempDir(), "project")
+	o := Options{Dir: dir, Module: "example.com/profile", FrameworkDir: frameworkRoot(t), Database: "mysql", Storage: "local", LogOutput: "file"}
+	if _, err := New(o); err != nil {
+		t.Fatal(err)
+	}
+	o = Options{Dir: dir, API: filepath.Join(dir, "api/service.api"), Check: true}
+	if _, err := Generate(o); err != nil {
+		t.Fatal(err)
+	}
+	before := snapshot(t, dir)
+	for _, changed := range []Options{
+		{Database: "none"}, {Storage: "s3"}, {LogOutput: "stdout"}, {LogFormat: "text"},
+	} {
+		changed.Dir, changed.API = dir, o.API
+		if _, err := Generate(changed); err == nil {
+			t.Fatal("profile switch accepted")
+		}
+		if !sameFiles(before, snapshot(t, dir)) {
+			t.Fatal("profile rejection changed project")
+		}
+	}
+	// Restoring a missing seed must use the saved profile, not current defaults.
+	if err := os.Remove(filepath.Join(dir, "internal/servicecontext/storage.go")); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := Generate(o); err == nil {
+		t.Fatal("check accepted missing infrastructure")
+	}
+	o.Check = false
+	if _, err := Generate(o); err != nil {
+		t.Fatal(err)
+	}
+	if !sameFiles(before, snapshot(t, dir)) {
+		t.Fatal("profile reconstruction changed project")
+	}
+}
+
+func TestAPIInfrastructureConsumers(t *testing.T) {
+	if os.Getenv("GO_OMNI_SCAFFOLD_INTEGRATION") == "" {
+		t.Skip("consumer module integration")
+	}
+	for _, db := range []string{"none", "mysql"} {
+		for _, storage := range []string{"none", "local", "s3", "r2", "oss"} {
+			t.Run(db+"/"+storage, func(t *testing.T) {
+				dir := filepath.Join(t.TempDir(), "project")
+				if _, err := New(Options{Dir: dir, Module: "example.com/profile", FrameworkDir: frameworkRoot(t), Database: db, Storage: storage, LogOutput: "file"}); err != nil {
+					t.Fatal(err)
+				}
+				if _, err := Generate(Options{Dir: dir, API: filepath.Join(dir, "api/service.api"), Check: true}); err != nil {
+					t.Fatal(err)
+				}
+				test := `package settings
+import("testing";"os")
+func TestConfiguration(t *testing.T){
+ t.Setenv("GO_OMNI_DB_DSN","test:test@tcp(127.0.0.1:1)/test")
+ t.Setenv("GO_OMNI_STORAGE_SIGNING_KEY","01234567890123456789012345678901")
+ t.Setenv("GO_OMNI_STORAGE_ACCESS_KEY","test");t.Setenv("GO_OMNI_STORAGE_SECRET_KEY","test")
+ t.Setenv("GO_OMNI_STORAGE_BUCKET","test");t.Setenv("GO_OMNI_STORAGE_ENDPOINT","ENDPOINT")
+ t.Setenv("GO_OMNI_STORAGE_ACCOUNT_ID","01234567890123456789012345678901")
+ cfg,err:=Load("../../etc/config.yaml");if err!=nil{t.Fatal(err)}
+ if cfg.Server.Log.File==""{t.Fatal("file logger absent")}
+ t.Setenv("GO_OMNI_LOG_OUTPUT","stdout");cfg,err=Load("");if err!=nil||cfg.Server.Log.File!=""{t.Fatalf("override: %v",err)}
+ _=os.Getenv("unused")
+}`
+				endpoint := ""
+				if storage == "s3" {
+					endpoint = "127.0.0.1:9000"
+				}
+				if storage == "oss" {
+					endpoint = "https://oss-cn-hangzhou.aliyuncs.com"
+				}
+				writeFile(t, filepath.Join(dir, "internal/settings/profile_test.go"), strings.ReplaceAll(test, `"ENDPOINT"`, `"`+endpoint+`"`))
+				ctx, cancel := context.WithTimeout(context.Background(), 90*time.Second)
+				defer cancel()
+				cmd := exec.CommandContext(ctx, "go", "test", "-mod=mod", "-race", "-count=1", "./...")
+				cmd.Dir = dir
+				cmd.Env = append(os.Environ(), "GOWORK=off", "GOFLAGS=")
+				out, err := cmd.CombinedOutput()
+				if err != nil {
+					t.Fatalf("%v\n%s", err, out)
+				}
+			})
+		}
+	}
+}

cmd/go-omni/apigen/projectEntry.go

@@ -0,0 +1,35 @@
+package apigen
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"path/filepath"
+)
+
+// ProjectEntry discovers the API entry recorded by generation, never guessing
+// which of several .api files is the service entry.
+func ProjectEntry(directory string) (string, error) {
+	root, err := filepath.Abs(directory)
+	if err != nil {
+		return "", err
+	}
+	if err = safePath(root, manifestPath); err != nil {
+		return "", err
+	}
+	data, err := os.ReadFile(filepath.Join(root, manifestPath))
+	if err != nil {
+		return "", fmt.Errorf("--api is required outside a generated project (no readable %s)", manifestPath)
+	}
+	var m manifest
+	if err = json.Unmarshal(data, &m); err != nil {
+		return "", fmt.Errorf("invalid API project manifest: %w", err)
+	}
+	if m.Version != 1 || filepath.Ext(m.Entry) != ".api" {
+		return "", fmt.Errorf("invalid API entry in %s; pass --api explicitly", manifestPath)
+	}
+	if err = safePath(root, m.Entry); err != nil {
+		return "", err
+	}
+	return filepath.Join(root, filepath.FromSlash(m.Entry)), nil
+}

cmd/go-omni/apigen/requestOptions.go

@@ -0,0 +1,95 @@
+package apigen
+
+import (
+	"errors"
+	"fmt"
+	"git.yuntuo.hk/k2safe/go-omni/contract"
+	"mime"
+	"strconv"
+	"strings"
+)
+
+func (p *parser) parseBody(r *Route) error {
+	props, err := p.metadata()
+	if err != nil {
+		return err
+	}
+	for key, value := range props {
+		switch key {
+		case "mode":
+			r.BodyMode = value
+		case "maxBytes":
+			r.MaxBodyBytes, err = strconv.ParseInt(value, 10, 64)
+			if err != nil || r.MaxBodyBytes <= 0 || r.MaxBodyBytes > 1<<40 {
+				return p.err("maxBytes must be 1..1099511627776 bytes")
+			}
+		default:
+			return fmt.Errorf("unknown body property %s", key)
+		}
+	}
+	if r.MaxBodyBytes == 0 {
+		r.MaxBodyBytes = contract.DefaultMaxBodyBytes
+	}
+	return nil
+}
+func validateRouteExtensions(r Route) error {
+	if r.BodyMode != "" && r.BodyMode != "json" && r.BodyMode != "raw" && r.BodyMode != "multipart" {
+		return errors.New("body mode must be json, raw or multipart")
+	}
+	if (r.BodyMode == "raw" || r.BodyMode == "multipart") && !r.Manual {
+		return errors.New("raw/multipart body requires @handlerMode manual")
+	}
+	if r.CustomBinding && (r.Manual || r.Request == "") {
+		return errors.New("@binding custom requires an automatic handler with a request DTO")
+	}
+	if r.MaxBodyBytes > 0 && (r.Method == "get" || r.Method == "head") {
+		return errors.New("GET/HEAD cannot declare a body limit")
+	}
+	if r.Produces != "" {
+		if !r.Manual {
+			return errors.New("@produces requires @handlerMode manual")
+		}
+		media, params, err := mime.ParseMediaType(r.Produces)
+		if err != nil || len(params) != 0 || media != r.Produces || strings.Contains(media, "*") {
+			return errors.New("produces requires a concrete media type without parameters")
+		}
+		if r.Response != "" || r.Status == 204 || r.Method == "head" {
+			return errors.New("@produces uses a manual response without a DTO, 204 or HEAD")
+		}
+	}
+	if r.Manual && r.Status == 204 && r.Response != "" {
+		return errors.New("204 cannot declare a response")
+	}
+	return nil
+}
+
+func decorateRequestOptions(op map[string]any, r Route) {
+	if r.Manual {
+		op["x-omni-handler-mode"] = "manual"
+	}
+	if r.CustomBinding {
+		op["x-omni-binding"] = "custom"
+	}
+	if r.MaxBodyBytes > 0 {
+		op["x-omni-max-body-bytes"] = r.MaxBodyBytes
+	}
+	if r.BodyMode == "raw" || r.BodyMode == "multipart" {
+		media := "application/octet-stream"
+		schema := map[string]any{"type": "string", "format": "binary"}
+		if r.BodyMode == "multipart" {
+			media = "multipart/form-data"
+			schema = map[string]any{"type": "object", "additionalProperties": true}
+		}
+		op["requestBody"] = map[string]any{"required": true, "content": map[string]any{media: map[string]any{"schema": schema}}}
+	}
+	if r.Produces != "" {
+		schema := map[string]any{"type": "string"}
+		if r.Produces == "application/octet-stream" {
+			schema["format"] = "binary"
+		}
+		if r.Produces == "application/json" {
+			schema = map[string]any{}
+		}
+		op["responses"].(map[string]any)[strconv.Itoa(r.Status)] = map[string]any{"description": "Success", "content": map[string]any{r.Produces: map[string]any{"schema": schema}}}
+	}
+}

cmd/go-omni/apigen/response.go

@@ -0,0 +1,114 @@
+package apigen
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"strings"
+
+	"git.yuntuo.hk/k2safe/go-omni/response"
+)
+
+type ResponseDefinition struct {
+	Name     string
+	Config   response.Config
+	Position string
+}
+
+func (p *parser) parseResponse() error {
+	pos := p.next().position
+	name, err := p.ident()
+	if err != nil {
+		return err
+	}
+	p.skip()
+	props, err := p.metadata()
+	if err != nil {
+		return err
+	}
+	values := map[string]any{}
+	for key, value := range props {
+		switch key {
+		case "successCode", "errorCode":
+			if kind := props["codeType"]; kind == "integer" || kind == "int32" || kind == "int64" {
+				var number json.Number
+				if err = json.Unmarshal([]byte(value), &number); err != nil {
+					return fmt.Errorf("%s: %s must be an integer", pos, key)
+				}
+				values[key] = number
+			} else {
+				values[key] = value
+			}
+		case "codes", "messages", "body", "errorBody":
+			decoder := json.NewDecoder(strings.NewReader(value))
+			decoder.UseNumber()
+			var object map[string]any
+			if err = decoder.Decode(&object); err != nil || object == nil {
+				return fmt.Errorf("%s: %s must be a JSON object", pos, key)
+			}
+			var extra any
+			if decoder.Decode(&extra) != io.EOF {
+				return fmt.Errorf("%s: invalid %s mapping", pos, key)
+			}
+			values[key] = object
+		default:
+			values[key] = value
+		}
+	}
+	data, err := json.Marshal(values)
+	if err != nil {
+		return err
+	}
+	decoder := json.NewDecoder(bytes.NewReader(data))
+	decoder.UseNumber()
+	decoder.DisallowUnknownFields()
+	var cfg response.Config
+	if err = decoder.Decode(&cfg); err != nil {
+		return fmt.Errorf("%s: response %s: %w", pos, name, err)
+	}
+	if err = cfg.Validate(); err != nil {
+		return fmt.Errorf("%s: %w", pos, err)
+	}
+	p.spec.Responses = append(p.spec.Responses, ResponseDefinition{Name: name, Config: cfg, Position: pos})
+	return nil
+}
+
+func responseConfig(spec *Spec, route Route) response.Config {
+	name := responseName(route)
+	for _, definition := range spec.Responses {
+		if definition.Name == name {
+			return definition.Config
+		}
+	}
+	return response.Config{}
+}
+
+func responseName(route Route) string {
+	if route.ResponseFormat == "raw" {
+		return route.ErrorResponseFormat
+	}
+	return route.ResponseFormat
+}
+
+func validateResponses(spec *Spec) error {
+	seen := map[string]bool{}
+	for _, definition := range spec.Responses {
+		if !exportedName.MatchString(definition.Name) || seen[definition.Name] {
+			return fmt.Errorf("%s: response template requires a unique UpperCamelCase name", definition.Position)
+		}
+		if err := definition.Config.Validate(); err != nil {
+			return fmt.Errorf("%s: %w", definition.Position, err)
+		}
+		seen[definition.Name] = true
+	}
+	for _, r := range spec.Routes {
+		if r.ResponseFormat != "" && r.ResponseFormat != "raw" && !seen[r.ResponseFormat] {
+			return fmt.Errorf("%s: unknown response template %s", r.Position, r.ResponseFormat)
+		}
+		if r.ErrorResponseFormat != "" && !seen[r.ErrorResponseFormat] {
+			return fmt.Errorf("%s: unknown error response template %s", r.Position, r.ErrorResponseFormat)
+		}
+	}
+	return nil
+}

cmd/go-omni/apigen/response_test.go

@@ -0,0 +1,360 @@
+package apigen
+
+import (
+	"context"
+	"encoding/json"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+	"testing"
+	"time"
+)
+
+const configurableResponseAPI = `syntax = "v1"
+response CommonResponse (
+ codeField: code
+ messageField: msg
+ dataField: data
+ requestIdField: "-"
+ codeType: integer
+ successCode: 200
+ errorCode: 9999
+ successMessage: "操作成功"
+ errorMessage: "系统错误"
+ dataMode: always
+ codes: {
+  "UNAUTHENTICATED": 401001,
+  "EMAIL_TAKEN": 409001
+ }
+ messages: {"UNAUTHENTICATED":"请先登录","EMAIL_TAKEN":"邮箱已存在"}
+)
+response PartnerResponse (
+ codeField: result
+ messageField: notice
+ dataField: payload
+ requestIdField: trace
+ successCode: "PASS"
+)
+error (
+ Unauthenticated 401 "UNAUTHENTICATED" "authentication required"
+ EmailTaken 409 "EMAIL_TAKEN" "email already taken"
+)
+auth Access (type: bearer
+ middleware: Auth
+)
+type ItemResponse {
+ Name string ` + "`json:\"name\"`" + `
+}
+@server (
+ group: items
+ response: CommonResponse
+ auth: Access
+ errors: Unauthenticated
+)
+service response-api {
+ @errors EmailTaken
+ @handler item
+ get /item returns (ItemResponse)
+ @response raw
+ @handler callback
+ post /callback returns (ItemResponse)
+ @response PartnerResponse
+ @handler partner
+ get /partner returns (ItemResponse)
+}
+`
+
+func TestResponseTemplatesDocumentAndValidation(t *testing.T) {
+	spec, err := parseText(t, configurableResponseAPI)
+	if err != nil {
+		t.Fatal(err)
+	}
+	c, err := Compile(spec)
+	if err != nil {
+		t.Fatal(err)
+	}
+	doc := document(t, c)
+	getSchema := func(path, status string) map[string]any {
+		method := "get"
+		if path == "/callback" {
+			method = "post"
+		}
+		return operation(t, doc, path, method)["responses"].(map[string]any)[status].(map[string]any)["content"].(map[string]any)["application/json"].(map[string]any)["schema"].(map[string]any)
+	}
+	properties := getSchema("/item", "200")["properties"].(map[string]any)
+	if len(properties) != 3 || properties["code"].(map[string]any)["type"] != "integer" || properties["msg"] == nil || properties["requestId"] != nil {
+		t.Fatal(properties)
+	}
+	if getSchema("/callback", "200")["properties"].(map[string]any)["name"] == nil {
+		t.Fatal("raw JSON was wrapped")
+	}
+	if getSchema("/callback", "401")["properties"].(map[string]any)["msg"] == nil {
+		t.Fatal("raw override lost group error policy")
+	}
+	if getSchema("/partner", "200")["properties"].(map[string]any)["payload"] == nil {
+		t.Fatal("route override not applied")
+	}
+	conflict := operation(t, doc, "/item", "get")["responses"].(map[string]any)["409"].(map[string]any)["content"].(map[string]any)["application/json"].(map[string]any)
+	value := conflict["examples"].(map[string]any)["EmailTaken"].(map[string]any)["value"].(map[string]any)
+	if value["code"] != float64(409001) || value["msg"] != "邮箱已存在" || len(value) != 3 {
+		t.Fatal(value)
+	}
+	if got := conflict["schema"].(map[string]any)["properties"].(map[string]any)["code"].(map[string]any)["enum"].([]any); got[0] != float64(409001) {
+		t.Fatal(got)
+	}
+	for _, change := range [][2]string{{"response: CommonResponse", "response: Missing"}, {"messageField: msg", "messageField: code"}, {"codeType: integer", "codeType: boolean"}, {"successCode: 200", "successCode: 2.5"}, {"requestIdField: \"-\"", "unknownOption: value"}, {"@response raw", "@response missing"}} {
+		invalid, err := parseText(t, strings.Replace(configurableResponseAPI, change[0], change[1], 1))
+		if err == nil {
+			_, err = Compile(invalid)
+		}
+		if err == nil || !strings.Contains(err.Error(), "service.api:") {
+			t.Fatalf("bad declaration %s: %v", change[1], err)
+		}
+	}
+}
+
+func TestImportedResponseTemplate(t *testing.T) {
+	dir := t.TempDir()
+	writeFile(t, filepath.Join(dir, "common.api"), "response Shared (messageField: msg)\n")
+	writeFile(t, filepath.Join(dir, "service.api"), "import \"common.api\"\n@server (response: Shared)\nservice shared-api {\n@handler ping\nget /ping\n}")
+	spec, err := Parse(filepath.Join(dir, "service.api"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	if _, err = Compile(spec); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestResponseNestedBodyDocument(t *testing.T) {
+	definition := `response Nested (
+ body: {"success":"${ok}","result":"${data}","meta":{"status":"${status}","trace":"${requestId}"},"version":1}
+ errorBody: {"success":"${ok}","error":{"id":"${code}","reason":"${message}"}}
+ codeType: integer
+ successCode: 0
+ errorCode: 9999
+ codes: {"EMAIL_TAKEN":409001}
+)
+`
+	spec, err := parseText(t, definition+strings.Replace(configurableResponseAPI, "response: CommonResponse", "response: Nested", 1))
+	if err != nil {
+		t.Fatal(err)
+	}
+	compiled, err := Compile(spec)
+	if err != nil {
+		t.Fatal(err)
+	}
+	doc := document(t, compiled)
+	responses := operation(t, doc, "/item", "get")["responses"].(map[string]any)
+	success := responses["200"].(map[string]any)["content"].(map[string]any)["application/json"].(map[string]any)["schema"].(map[string]any)["properties"].(map[string]any)
+	if success["code"] != nil || success["result"] == nil || success["success"].(map[string]any)["type"] != "boolean" {
+		t.Fatal(success)
+	}
+	media := responses["409"].(map[string]any)["content"].(map[string]any)["application/json"].(map[string]any)
+	schema := media["schema"].(map[string]any)["properties"].(map[string]any)
+	if schema["error"].(map[string]any)["properties"].(map[string]any)["id"].(map[string]any)["type"] != "integer" || schema["result"] != nil {
+		t.Fatal(schema)
+	}
+	example := media["examples"].(map[string]any)["EmailTaken"].(map[string]any)["value"].(map[string]any)
+	if example["success"] != false || example["error"].(map[string]any)["id"] != float64(409001) {
+		t.Fatal(example)
+	}
+}
+
+func TestResponseTemplateJSONTokens(t *testing.T) {
+	for _, tc := range []struct {
+		body  string
+		valid bool
+	}{
+		{`{"scale":-1.5,"exponent":1e-3,"items":[true,null,"${data}"],"label":"a b"}`, true},
+		{`{"scale":1 2}`, false}, {`{"scale":- 12}`, false},
+		{`{"scale":tru e}`, false}, {`{"scale":1. 2}`, false},
+	} {
+		text := "response Shared (\nbody: " + tc.body + "\n)\n@server (response: Shared)\nservice test-api {\n@handler ping\nget /ping\n}\n"
+		spec, err := parseText(t, text)
+		if err == nil {
+			_, err = Compile(spec)
+		}
+		if (err == nil) != tc.valid {
+			t.Fatalf("%s: %v", tc.body, err)
+		}
+	}
+}
+
+func TestResponseCodeTypeDeclarations(t *testing.T) {
+	for _, kind := range []string{"int32", "int64"} {
+		source := strings.Replace(configurableResponseAPI, "codeType: integer", "codeType: "+kind, 1)
+		spec, err := parseText(t, source)
+		if err != nil {
+			t.Fatal(err)
+		}
+		compiled, err := Compile(spec)
+		if err != nil {
+			t.Fatal(err)
+		}
+		doc := document(t, compiled)
+		for _, status := range []string{"200", "401", "409", "500"} {
+			responses := operation(t, doc, "/item", "get")["responses"].(map[string]any)
+			schema := responses[status].(map[string]any)["content"].(map[string]any)["application/json"].(map[string]any)["schema"].(map[string]any)
+			code := schema["properties"].(map[string]any)["code"].(map[string]any)
+			if code["type"] != "integer" || code["format"] != kind {
+				t.Fatal(code)
+			}
+		}
+		for _, bad := range []string{"2.5", "9223372036854775808", "-9223372036854775809"} {
+			invalid := strings.Replace(source, "successCode: 200", "successCode: "+bad, 1)
+			if _, err := parseText(t, invalid); err == nil || !strings.Contains(err.Error(), "service.api:") {
+				t.Fatalf("%s %s: %v", kind, bad, err)
+			}
+		}
+	}
+	invalid := strings.Replace(configurableResponseAPI, "codeType: integer", "codeType: int32", 1)
+	invalid = strings.Replace(invalid, `"EMAIL_TAKEN": 409001`, `"EMAIL_TAKEN": 2147483648`, 1)
+	if _, err := parseText(t, invalid); err == nil {
+		t.Fatal("overflowing int32 mapping accepted")
+	}
+}
+
+func TestResponseTemplateConsumer(t *testing.T) {
+	if os.Getenv("GO_OMNI_SCAFFOLD_INTEGRATION") == "" {
+		t.Skip("consumer integration")
+	}
+	dir := filepath.Join(t.TempDir(), "project")
+	source := filepath.Join(t.TempDir(), "service.api")
+	// Use an explicitly declared public body, rather than field-name shortcuts.
+	sourceText := strings.Replace(configurableResponseAPI, " codeField: code\n messageField: msg\n dataField: data\n requestIdField: \"-\"", ` body: {"code":"${code}","msg":"${message}","data":"${data}"}`, 1)
+	sourceText = strings.Replace(sourceText, "codeType: integer", "codeType: int64", 1)
+	sourceText = strings.Replace(sourceText, "successCode: 200", "successCode: 9223372036854775807", 1)
+	writeFile(t, source, sourceText)
+	releaseCLI := os.Getenv("GO_OMNI_RELEASE_CLI")
+	generate := func(api string, initial bool) {
+		t.Helper()
+		if releaseCLI != "" {
+			ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
+			defer cancel()
+			cmd := exec.CommandContext(ctx, releaseCLI, "api", "generate", "--api", api, "--dir", dir, "--module", "example.com/responseConsumer")
+			// The framework checkout intentionally enables local development mode.
+			// Run the installed CLI outside it to exercise remote-only consumption.
+			cmd.Dir = filepath.Dir(dir)
+			if output, err := cmd.CombinedOutput(); err != nil {
+				t.Fatalf("released CLI: %v\n%s", err, output)
+			}
+			return
+		}
+		o := Options{API: api, Dir: dir}
+		if initial {
+			o.Module = "example.com/responseConsumer"
+			o.FrameworkDir = frameworkRoot(t)
+		}
+		if _, err := Generate(o); err != nil {
+			t.Fatal(err)
+		}
+	}
+	generate(source, true)
+	writeFile(t, filepath.Join(dir, "response_test.go"), responseConsumerTest)
+	for _, method := range []string{"Item", "Callback", "Partner"} {
+		body := `return &types.ItemResponse{Name:"` + strings.ToLower(method) + `"},nil`
+		if method == "Partner" {
+			body = `return nil,apierrors.EmailTaken()`
+		}
+		imports := `"context";"example.com/responseConsumer/internal/types"`
+		if method == "Partner" {
+			imports += `;"example.com/responseConsumer/internal/apierrors"`
+		}
+		writeFile(t, filepath.Join(dir, "internal/service/items", strings.ToLower(method)+".go"), "package items\nimport("+imports+")\nfunc(s *Service)"+method+"(ctx context.Context)(*types.ItemResponse,error){"+body+"}\n")
+	}
+	before := snapshot(t, dir)
+	generate(filepath.Join(dir, "api/service.api"), false)
+	if !sameFiles(before, snapshot(t, dir)) {
+		t.Fatal("regeneration changed hand-written files")
+	}
+	ctx, cancel := context.WithTimeout(context.Background(), 90*time.Second)
+	defer cancel()
+	cmd := exec.CommandContext(ctx, "go", "test", "-mod=mod", "-race", "-count=1", "./...")
+	cmd.Dir = dir
+	cmd.Env = append(os.Environ(), "GOWORK=off", "GOFLAGS=")
+	if output, err := cmd.CombinedOutput(); err != nil {
+		t.Fatalf("consumer: %v\n%s", err, output)
+	}
+	if releaseCLI != "" {
+		cmd = exec.CommandContext(ctx, "go", "list", "-m", "-json", frameworkModule)
+		cmd.Dir = dir
+		cmd.Env = append(os.Environ(), "GOWORK=off", "GOFLAGS=")
+		output, err := cmd.CombinedOutput()
+		if err != nil {
+			t.Fatalf("released module: %v\n%s", err, output)
+		}
+		var module struct {
+			Version, Sum string
+			Replace      any
+		}
+		if err = json.Unmarshal(output, &module); err != nil {
+			t.Fatal(err)
+		}
+		if module.Version != os.Getenv("GO_OMNI_RELEASE_VERSION") || module.Replace != nil || module.Sum == "" {
+			t.Fatalf("expected fixed remote module without replacement: %+v", module)
+		}
+		t.Logf("remote framework %s checksum %s; no local replace", module.Version, module.Sum)
+	}
+	manifestBytes, err := os.ReadFile(filepath.Join(dir, manifestPath))
+	if err != nil {
+		t.Fatal(err)
+	}
+	var manifest manifest
+	if err = json.Unmarshal(manifestBytes, &manifest); err != nil {
+		t.Fatal(err)
+	}
+	if manifest.Generated["internal/handler/responseGen.go"] == "" {
+		t.Fatal("response policy not ownership-managed")
+	}
+}
+
+const responseConsumerTest = `package responseConsumer_test
+import (
+ "bytes";"encoding/json";"io";"net/http/httptest";"testing"
+ omni "git.yuntuo.hk/k2safe/go-omni"
+ "git.yuntuo.hk/k2safe/go-omni/httpx"
+ "git.yuntuo.hk/k2safe/go-omni/logx"
+ "git.yuntuo.hk/k2safe/go-omni/response"
+ "example.com/responseConsumer/internal/apierrors"
+ "example.com/responseConsumer/internal/handler"
+ item "example.com/responseConsumer/internal/handler/items"
+ "example.com/responseConsumer/internal/types"
+ "context"
+ "example.com/responseConsumer/internal/servicecontext"
+)
+type service struct{}
+func(service)Item(context.Context)(*types.ItemResponse,error){return &types.ItemResponse{Name:"item"},nil}
+func(service)Callback(context.Context)(*types.ItemResponse,error){return &types.ItemResponse{Name:"callback"},nil}
+func(service)Partner(context.Context)(*types.ItemResponse,error){return nil,apierrors.EmailTaken()}
+func TestResponseContract(t *testing.T){
+ app:=omni.New();defer app.Close()
+ cfg:=logx.Default();cfg.Writer=io.Discard;logger,err:=logx.New(cfg);if err!=nil{t.Fatal(err)};defer logger.Close()
+ deps,err:=servicecontext.New(context.Background(),logger);if err!=nil{t.Fatal(err)};defer deps.Close()
+ deps.Middlewares["Auth"]=func(next httpx.Handler)httpx.Handler{return func(c *httpx.Context)error{if c.Header("Authorization")!="Bearer valid"{return apierrors.Unauthenticated()};return next(c)}}
+ if err=handler.RegisterRoutes(app,deps);err!=nil{t.Fatal(err)}
+ // Registered routes use the compiled policy before even running authentication.
+ for _,path:=range []string{"/item","/callback"}{
+   method:="GET";if path=="/callback"{method="POST"};w:=httptest.NewRecorder();app.ServeHTTP(w,httptest.NewRequest(method,path,nil))
+   var value map[string]any;json.Unmarshal(w.Body.Bytes(),&value)
+   if w.Code!=401||value["code"]!=float64(401001)||value["msg"]!="请先登录"||len(value)!=3{t.Fatalf("%s: %s",path,w.Body.String())}
+ }
+ // Execute the real generated registration and user-owned service files.
+ for _,tc:=range []struct{method,path string;status int;key string}{{"GET","/item",200,"data"},{"POST","/callback",200,"name"},{"GET","/partner",409,"result"}}{
+   w:=httptest.NewRecorder();r:=httptest.NewRequest(tc.method,tc.path,nil);r.Header.Set("Authorization","Bearer valid");app.ServeHTTP(w,r)
+   var value map[string]any;decoder:=json.NewDecoder(bytes.NewReader(w.Body.Bytes()));decoder.UseNumber();if err:=decoder.Decode(&value);err!=nil{t.Fatal(err)}
+   if w.Code!=tc.status||value[tc.key]==nil{t.Fatalf("generated %s: %d %s",tc.path,w.Code,w.Body.String())}
+   if tc.path=="/item"&&value["code"]!=json.Number("9223372036854775807"){t.Fatalf("generated int64 lost precision: %s",w.Body.String())}
+ }
+ // Business handlers also honor the same runtime policy and raw override.
+ h:=item.New(service{});runtime:=omni.New();defer runtime.Close()
+ common:=response.MustNew(response.Config{CodeType:"integer",SuccessCode:200,ErrorCode:9999,MessageField:"msg",RequestIDField:"-",DataMode:"always"})
+ runtime.GET("/item",h.Item,httpx.WithResponse(common))
+ runtime.POST("/callback",h.Callback,httpx.WithResponse(response.RawJSON(common)))
+ for _,tc:=range []struct{method,path,key string}{{"GET","/item","data"},{"POST","/callback","name"}}{
+  w:=httptest.NewRecorder();runtime.ServeHTTP(w,httptest.NewRequest(tc.method,tc.path,nil));var value map[string]any;json.Unmarshal(w.Body.Bytes(),&value)
+  if w.Code!=200||value[tc.key]==nil{t.Fatal(w.Body.String())}
+ }
+}
+`

cmd/go-omni/apigen/scalar.go

@@ -0,0 +1,74 @@
+package apigen
+
+import (
+	"fmt"
+	"git.yuntuo.hk/k2safe/go-omni/contract"
+	"golang.org/x/mod/module"
+	"reflect"
+	"strings"
+)
+
+type ScalarDefinition struct {
+	Name, GoImport, GoType, JSONInput, JSONOutput, Position string
+	Text                                                    bool
+}
+
+func (p *parser) parseScalar() error {
+	pos := p.next().position
+	name, err := p.ident()
+	if err != nil {
+		return err
+	}
+	p.skip()
+	props, err := p.metadata()
+	if err != nil {
+		return err
+	}
+	d := ScalarDefinition{Name: name, Position: pos}
+	for key, value := range props {
+		switch key {
+		case "goImport":
+			d.GoImport = value
+		case "goType":
+			d.GoType = value
+		case "jsonInput":
+			d.JSONInput = value
+		case "jsonOutput":
+			d.JSONOutput = value
+		case "text":
+			if value != "true" && value != "false" {
+				return p.err("text must be true or false")
+			}
+			d.Text = value == "true"
+		default:
+			return fmt.Errorf("%s: unknown scalar property %s", pos, key)
+		}
+	}
+	p.spec.Scalars = append(p.spec.Scalars, d)
+	return nil
+}
+func compileScalars(spec *Spec, types map[string]Type) (map[string]reflect.Type, []contract.Scalar, error) {
+	out := map[string]reflect.Type{}
+	var defs []contract.Scalar
+	goTypes := map[string]bool{}
+	for _, d := range spec.Scalars {
+		key := d.GoImport + "." + d.GoType
+		if d.Name == "ContractScalars" || !exportedName.MatchString(d.Name) || !exportedName.MatchString(d.GoType) || out[d.Name] != nil || types[d.Name].Name != "" || goTypes[key] {
+			return nil, nil, fmt.Errorf("%s: scalar names and Go types must be unique; names must be UpperCamelCase", d.Position)
+		}
+		if err := module.CheckImportPath(d.GoImport); err != nil || strings.Contains(d.GoImport, "\\") {
+			return nil, nil, fmt.Errorf("%s: invalid scalar goImport", d.Position)
+		}
+		// Unique stand-in types allow CLI schema checks without executing project code.
+		t := reflect.StructOf([]reflect.StructField{{Name: d.Name, Type: reflect.TypeOf(false)}})
+		def := contract.Scalar{Type: t, JSONInput: d.JSONInput, JSONOutput: d.JSONOutput, Text: d.Text}
+		probe := reflect.StructOf([]reflect.StructField{{Name: "Value", Type: t, Tag: `json:"value"`}})
+		if _, err := contract.Describe(probe, def); err != nil {
+			return nil, nil, fmt.Errorf("%s: %w", d.Position, err)
+		}
+		out[d.Name] = t
+		defs = append(defs, def)
+		goTypes[key] = true
+	}
+	return out, defs, nil
+}

cmd/go-omni/apigen/templates.go

@@ -0,0 +1,176 @@
+package apigen
+
+import "fmt"
+
+var baseTemplates = map[string]string{
+	"cmd/server/main.go": `package main
+import (
+ "context"
+ "errors"
+ "flag"
+ "log"
+ "os"
+ "os/signal"
+ "syscall"
+ omni "git.yuntuo.hk/k2safe/go-omni"
+ "git.yuntuo.hk/k2safe/go-omni/logx"
+ "MODULE/internal/handler"
+ "MODULE/internal/servicecontext"
+ "MODULE/internal/settings"
+)
+func main(){
+ path:=flag.String("config","etc/config.yaml","configuration file; empty uses defaults and environment")
+ flag.Parse()
+ if err:=run(*path);err!=nil{log.Fatal(err)}
+}
+func run(path string)(runErr error){
+ ctx,stop:=signal.NotifyContext(context.Background(),os.Interrupt,syscall.SIGTERM)
+ defer stop()
+ cfg,err:=settings.Load(path);if err!=nil{return err}
+ logger,err:=logx.New(cfg.Server.Log);if err!=nil{return err}
+ defer func(){runErr=errors.Join(runErr,logger.Close())}()
+ logx.SetDefault(logger)
+ deps,err:=servicecontext.New(ctx,logger,cfg);if err!=nil{return err}
+ defer func(){runErr=errors.Join(runErr,deps.Close())}()
+ app:=omni.New(omni.WithConfig(cfg.Server))
+ app.OnShutdown(logger.Close)
+ app.OnShutdown(deps.Close)
+ if err=handler.RegisterRoutes(app,deps);err!=nil{return err}
+ app.GET("/openapi.json",handler.OpenAPI)
+ app.GET("/health/live",deps.Health.LivenessHandler())
+ app.GET("/health/ready",deps.Health.ReadinessHandler())
+ logger.InfoContext(ctx,"service.starting","address",cfg.Server.Address)
+ return app.RunContext(ctx,cfg.Server.Address)
+}
+`,
+	".gitignore": "/server\n/var/\n.env\n.env.*\n!.env.example\n/.goOmni/api.lock\n",
+}
+
+func projectREADME(module, entry string) string {
+	return fmt.Sprintf(`# %s
+
+This project is generated from an editable API contract. Business code uses
+standard context.Context; generated HTTP handlers use Omni's transport-neutral httpx.
+
+## Run
+
+`+"```sh"+`
+go mod tidy
+go run ./cmd/server
+`+"```"+`
+
+GET /health/live and /health/ready check the running service. GET /openapi.json
+serves the same document as docs/openapi.json. Bind address defaults to localhost.
+Set GO_OMNI_TRANSPORT=native to select the native transport without changing services.
+The greeting starter works immediately; other new operation stubs return 501 until
+their business logic is implemented. Authentication hooks also fail closed with 501.
+
+## Develop
+
+1. Edit %s and its relative imports.
+2. Run the same go-omni CLI version as the framework dependency:
+
+`+"```sh"+`
+go-omni api validate
+go-omni api inspect
+go-omni api generate --dry-run
+go-omni api generate
+go-omni api generate --check
+go-omni api export > openapi.json
+go test ./...
+`+"```"+`
+
+Commands inside a generated project discover the recorded API entry automatically.
+--dry-run previews create/update/remove actions without writing files.
+The --check command is read-only and suitable for CI. It fails on stale or missing
+generated files and missing business scaffolds. go.mod, configuration, main,
+Service, Repository, servicecontext, middleware hook bodies and API files are
+created once and then preserved byte for byte. Gen.go files and OpenAPI are owned
+by the generator; manual edits cause a conflict instead of being overwritten.
+Commit .goOmni/apiManifest.json alongside the generated files. Do not edit it.
+Avoid editing files while generation is running; api.lock serializes generators.
+
+Routes and types that disappear are removed from generated output. Handwritten
+business files remain: remove/adapt obsolete implementations explicitly if an
+API change makes their old types or signatures fail to compile. Every regeneration
+must be followed by go test ./... . Do not delete service files to change contracts.
+
+## Layout
+
+`+"```text"+`
+api/                         # editable contract and imported types
+cmd/server/main.go           # startup, lifecycle and route registration
+etc/config.yaml              # lowerCamelCase configuration
+internal/settings/           # defaults -> file -> environment
+internal/servicecontext/     # dependency initialization and cleanup
+internal/types/typesGen.go    # generated request/response types
+internal/apierrors/errorsGen.go # generated fresh error constructors, when declared
+internal/handler/<group>/     # generated binding and service adapters
+internal/service/<group>/     # developer-owned business operations
+internal/repository/<group>/  # developer-owned persistence contracts
+internal/middleware/         # named hooks and generated registry
+docs/openapi.json             # generated OpenAPI 3.0.3
+.goOmni/apiManifest.json      # ownership and content hashes
+`+"```"+`
+
+The API response type describes business data. Declare response Name (...) and
+select it with @server(response: Name) or @response Name to share a public body;
+@response raw returns the business JSON directly. Without a template, the default
+envelope includes code, message, data and requestId. Generated routes and OpenAPI
+use the API contract, independently of the app's default response configuration.
+Handlers reject nil successful responses. Body DTOs use application/json and have a 1 MiB limit by default.
+Use contract.Binder.Bind's optional limit in a custom adapter for larger payloads.
+
+Fields require exactly one source tag: json, path, form (URL query only), header.
+All are required by presence unless optional, omitempty or default is specified.
+Zero and false are valid present values; binding:"required" rejects scalar zero.
+Use *T with optional when business logic needs to distinguish missing from zero.
+Pointers may carry null; non-pointer null is rejected. Unknown/duplicate JSON
+fields and duplicate scalar query/header values are rejected. Arrays in the query
+use repeated keys. Enum/range/default and nested fields share the documentation
+and binding compiler. Responses are expected to honor their declared constraints;
+they are not validated on every response. Do not return nil slices/maps for a
+non-nullable collection (initialize empty collections instead).
+
+Declare public business errors in error (...) and reference them with @errors.
+Use internal/apierrors constructors to share status, code and message with OpenAPI.
+Auth declarations connect a bearer/header/cookie scheme to a real named middleware.
+The selected auth runs first; @auth none removes inherited declarative auth.
+Validation policy remains in the middleware implementation. Public messages must
+not contain secrets; error causes may be included in server logs.
+
+Named middleware is composed in declaration order (first is outermost). Implement
+the generated hooks or replace entries in servicecontext; never bypass an auth
+hook merely to make the server start. Middleware names do not imply a JWT policy.
+
+This CLI supports a documented go-zero-style subset, not all goctl features.
+Database tables and repositories cannot be inferred from an HTTP contract. Add
+business repositories through servicecontext. Database and storage options are
+composed at creation; the original profile is retained on regeneration.
+`, module, entry)
+}
+
+func infrastructureREADME(o Options) string {
+	return fmt.Sprintf(`
+## Infrastructure
+
+Selected database: %s; storage: %s; logging: %s/%s.
+MySQL uses database/sql through deps.DB, including InTx and a readiness probe.
+Set GO_OMNI_DB_DSN; pool settings live in etc/config.yaml and GO_OMNI_DB_*.
+No tables are invented or migrated automatically from request/response DTOs.
+The none/memory selection opens no database; implement repositories per business.
+
+With storage enabled, services receive deps.Files, Uploads, Downloads and
+UploadLinks capability interfaces. Local signed GET/HEAD/PUT uses /storage/object;
+set GO_OMNI_STORAGE_SIGNING_KEY (32+ bytes) and GO_OMNI_STORAGE_PUBLIC_URL.
+Cloud credentials use GO_OMNI_STORAGE_ACCESS_KEY/SECRET_KEY; set bucket and endpoint
+or R2 accountId as appropriate. Signed URLs grant temporary access: authenticate
+and authorize before issuing them. No public upload-link route is added.
+Storage failures during startup close an already-open database; Close is idempotent.
+
+Database/storage/logging selection is recorded in .goOmni/apiManifest.json.
+Changing selection through generation flags is rejected on an existing project;
+edit your owned configuration and initialization explicitly, or generate a fresh
+project for comparison. New routes still regenerate without repeating these flags.
+`, o.Database, o.Storage, o.LogOutput, o.LogFormat)
+}

cmd/go-omni/apigen/testdata/compatibility/consumer_test.go

@@ -0,0 +1,117 @@
+package compatibility_test
+
+import (
+	"bytes"
+	"context"
+	"crypto/hmac"
+	"crypto/sha256"
+	"encoding/hex"
+	"encoding/json"
+	"example.com/compatibility/internal/handler"
+	"example.com/compatibility/internal/servicecontext"
+	omni "git.yuntuo.hk/k2safe/go-omni"
+	"git.yuntuo.hk/k2safe/go-omni/logx"
+	"io"
+	"mime/multipart"
+	"net/http/httptest"
+	"os"
+	"strings"
+	"testing"
+)
+
+func TestGeneratedCompatibility(t *testing.T) {
+	logger, err := logx.New(logx.Config{Writer: io.Discard})
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer logger.Close()
+	deps, err := servicecontext.New(context.Background(), logger)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer deps.Close()
+	app := omni.New()
+	defer app.Close()
+	if err = handler.RegisterRoutes(app, deps); err != nil {
+		t.Fatal(err)
+	}
+	send := func(method, path, body, contentType string) *httptest.ResponseRecorder {
+		r := httptest.NewRequest(method, path, strings.NewReader(body))
+		r.Header.Set("Content-Type", contentType)
+		w := httptest.NewRecorder()
+		app.ServeHTTP(w, r)
+		return w
+	}
+	for _, id := range []string{`9223372036854775807`, `"9223372036854775807"`} {
+		w := send("POST", "/echo", `{"id":`+id+`,"data":{"n":9223372036854775807}}`, "application/json")
+		if w.Code != 200 || !strings.Contains(w.Body.String(), `"id":"9223372036854775807"`) || !strings.Contains(w.Body.String(), `"n":9223372036854775807`) {
+			t.Fatalf("scalar/dynamic: %d %s", w.Code, w.Body)
+		}
+	}
+	for _, body := range []string{`{"id":true,"data":null}`, `{"id":9223372036854775808,"data":null}`, `{"id":1,"data":{"x":1,"x":2}}`, `{"id":1,"data":null,"extra":1}`} {
+		if w := send("POST", "/echo", body, "application/json"); w.Code != 400 {
+			t.Fatalf("accepted %s: %d", body, w.Code)
+		}
+	}
+	payload := `{"id":1,"data":"` + strings.Repeat("x", (1<<20)+1) + `"}`
+	if w := send("POST", "/echo", payload, "application/json"); w.Code != 200 {
+		t.Fatalf("route limit not passed to Binder: %d", w.Code)
+	}
+	if w := send("POST", "/echo", `{"id":1,"data":"`+strings.Repeat("x", 2<<20)+`"}`, "application/json"); w.Code != 413 {
+		t.Fatalf("large JSON: %d", w.Code)
+	}
+	if w := send("GET", "/items/9223372036854775807", "", ""); w.Code != 200 || !strings.Contains(w.Body.String(), `"id":"9223372036854775807"`) {
+		t.Fatalf("text scalar: %d %s", w.Code, w.Body)
+	}
+	if w := send("POST", "/custom", `{"value":"hello"}`, "application/json"); w.Code != 200 || !strings.Contains(w.Body.String(), "HELLO") {
+		t.Fatalf("custom binder: %d %s", w.Code, w.Body)
+	}
+	raw := `{ "event": 1, "id": "original bytes" }`
+	mac := hmac.New(sha256.New, []byte("fixture-only-key"))
+	mac.Write([]byte(raw))
+	r := httptest.NewRequest("POST", "/callback", strings.NewReader(raw))
+	r.Header.Set("X-Signature", hex.EncodeToString(mac.Sum(nil)))
+	w := httptest.NewRecorder()
+	app.ServeHTTP(w, r)
+	if w.Code != 200 || w.Body.String() != "accepted" {
+		t.Fatalf("raw callback: %d %s", w.Code, w.Body)
+	}
+	r = httptest.NewRequest("POST", "/callback", strings.NewReader(strings.Repeat("x", 129)))
+	r.ContentLength = -1
+	w = httptest.NewRecorder()
+	app.ServeHTTP(w, r)
+	if w.Code != 413 {
+		t.Fatalf("chunked body limit: %d %s", w.Code, w.Body)
+	}
+	temp := t.TempDir()
+	t.Setenv("TMPDIR", temp)
+	var form bytes.Buffer
+	writer := multipart.NewWriter(&form)
+	part, err := writer.CreateFormFile("file", "sample.bin")
+	if err != nil {
+		t.Fatal(err)
+	}
+	part.Write(bytes.Repeat([]byte("x"), 8192))
+	writer.Close()
+	w = send("POST", "/upload", form.String(), writer.FormDataContentType())
+	if w.Code != 200 || !strings.Contains(w.Body.String(), `"bytes":8192`) {
+		t.Fatalf("upload: %d %s", w.Code, w.Body)
+	}
+	entries, err := os.ReadDir(temp)
+	if err != nil || len(entries) != 0 {
+		t.Fatalf("multipart temp files leaked: %v %v", entries, err)
+	}
+	w = send("GET", "/download", "", "")
+	if w.Code != 200 || w.Body.Len() != 128<<10 || w.Header().Get("Content-Disposition") == "" {
+		t.Fatalf("download wrapped: %d %d", w.Code, w.Body.Len())
+	}
+	var doc map[string]any
+	if err = json.Unmarshal([]byte(handler.OpenAPIDocument), &doc); err != nil {
+		t.Fatal(err)
+	}
+	paths := doc["paths"].(map[string]any)
+	media := paths["/download"].(map[string]any)["get"].(map[string]any)["responses"].(map[string]any)["200"].(map[string]any)["content"].(map[string]any)
+	if media["application/octet-stream"] == nil || media["application/json"] != nil {
+		t.Fatal("download schema is JSON")
+	}
+}

cmd/go-omni/apigen/testdata/compatibility/download.go

@@ -0,0 +1,16 @@
+package files
+
+import (
+	"git.yuntuo.hk/k2safe/go-omni/httpx"
+	"io"
+	"net/http"
+	"strings"
+)
+
+func (h *Handler) Download(c *httpx.Context) error {
+	return httpx.WrapHandler(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/octet-stream")
+		w.Header().Set("Content-Disposition", `attachment; filename="demo.bin"`)
+		_, _ = io.Copy(w, strings.NewReader(strings.Repeat("x", 128<<10)))
+	}))(c)
+}

cmd/go-omni/apigen/testdata/compatibility/echo.go

@@ -0,0 +1,16 @@
+package demo
+
+import (
+	"context"
+	"example.com/compatibility/internal/types"
+)
+
+func (s *Service) Echo(ctx context.Context, req *types.EchoReq) (*types.EchoResp, error) {
+	return &types.EchoResp{ID: req.ID, Data: req.Data}, nil
+}
+func (s *Service) Item(ctx context.Context, req *types.ItemReq) (*types.EchoResp, error) {
+	return &types.EchoResp{ID: req.ID, Data: map[string]any{"found": true}}, nil
+}
+func (s *Service) Custom(ctx context.Context, req *types.CustomReq) (*types.CustomResp, error) {
+	return &types.CustomResp{Value: req.Value}, nil
+}

cmd/go-omni/apigen/testdata/compatibility/hooks.go

@@ -0,0 +1,58 @@
+package demo
+
+import (
+	"crypto/hmac"
+	"crypto/sha256"
+	"encoding/hex"
+	"encoding/json"
+	"example.com/compatibility/internal/types"
+	apierrors "git.yuntuo.hk/k2safe/go-omni/errors"
+	"git.yuntuo.hk/k2safe/go-omni/httpx"
+	"io"
+	"net/http"
+	"strings"
+)
+
+func (h *Handler) bindCustom(c *httpx.Context, req *types.CustomReq) error {
+	decoder := json.NewDecoder(c.Request().Body)
+	decoder.DisallowUnknownFields()
+	if err := decoder.Decode(req); err != nil {
+		return apierrors.BadRequest("INVALID_REQUEST", "invalid request").WithCause(err)
+	}
+	var extra any
+	if err := decoder.Decode(&extra); err != io.EOF {
+		return apierrors.BadRequest("INVALID_REQUEST", "one JSON value required").WithCause(err)
+	}
+	req.Value = strings.ToUpper(req.Value)
+	return nil
+}
+func (h *Handler) Upload(c *httpx.Context) error {
+	// The small memory threshold deliberately exercises disk spill and cleanup.
+	if err := c.Request().ParseMultipartForm(8); err != nil {
+		return err
+	}
+	file, _, err := c.Request().FormFile("file")
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+	count, err := io.Copy(io.Discard, file)
+	if err != nil {
+		return err
+	}
+	return c.OK(map[string]any{"bytes": count})
+}
+func (h *Handler) Callback(c *httpx.Context) error {
+	raw, err := io.ReadAll(c.Request().Body)
+	if err != nil {
+		return err
+	}
+	// This fixed key belongs only to the test fixture. Applications inject secrets.
+	mac := hmac.New(sha256.New, []byte("fixture-only-key"))
+	mac.Write(raw)
+	signature, err := hex.DecodeString(c.Header("X-Signature"))
+	if err != nil || !hmac.Equal(signature, mac.Sum(nil)) {
+		return c.Text(http.StatusUnauthorized, "invalid signature")
+	}
+	return c.Text(http.StatusOK, "accepted")
+}

cmd/go-omni/apigen/write.go

@@ -0,0 +1,311 @@
+package apigen
+
+import (
+	"bytes"
+	"crypto/sha256"
+	"encoding/hex"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+)
+
+const manifestPath = ".goOmni/apiManifest.json"
+
+type manifest struct {
+	Profile   *projectProfile   `json:"profile,omitempty"`
+	Version   int               `json:"version"`
+	Module    string            `json:"module"`
+	Entry     string            `json:"entry"`
+	Generated map[string]string `json:"generated"`
+}
+type change struct {
+	name            string
+	before, after   []byte
+	existed, remove bool
+	mode            os.FileMode
+}
+
+func apply(root, module, entry string, generated, seeds map[string][]byte, check, dryRun bool, profile projectProfile) (Output, error) {
+	var result Output
+	if info, err := os.Lstat(root); err == nil {
+		if info.Mode()&os.ModeSymlink != 0 || !info.IsDir() {
+			return result, errors.New("api: output root must be a real directory")
+		}
+	} else if !errors.Is(err, os.ErrNotExist) {
+		return result, err
+	}
+	root = canonical(root)
+	names := map[string]bool{}
+	caseNames := map[string]string{}
+	for _, files := range []map[string][]byte{generated, seeds} {
+		for name := range files {
+			if names[name] {
+				return result, fmt.Errorf("duplicate output %s", name)
+			}
+			names[name] = true
+			folded := strings.ToLower(name)
+			if old, ok := caseNames[folded]; ok {
+				return result, fmt.Errorf("case-insensitive path collision: %s and %s", old, name)
+			}
+			caseNames[folded] = name
+			if err := safePath(root, name); err != nil {
+				return result, err
+			}
+		}
+	}
+	if err := safePath(root, manifestPath); err != nil {
+		return result, err
+	}
+	if !check && !dryRun {
+		if err := os.MkdirAll(filepath.Join(root, ".goOmni"), 0755); err != nil {
+			return result, err
+		}
+		lock := filepath.Join(root, ".goOmni", "api.lock")
+		f, err := os.OpenFile(lock, os.O_WRONLY|os.O_CREATE|os.O_EXCL, 0600)
+		if err != nil {
+			return result, fmt.Errorf("api: acquire generation lock (remove stale api.lock only after checking no generator is running): %w", err)
+		}
+		_, _ = fmt.Fprintf(f, "pid=%d\n", os.Getpid())
+		_ = f.Close()
+		defer os.Remove(lock)
+	}
+	old := manifest{Generated: map[string]string{}}
+	oldData, err := os.ReadFile(filepath.Join(root, manifestPath))
+	if err == nil {
+		if err = json.Unmarshal(oldData, &old); err != nil {
+			return result, fmt.Errorf("invalid ownership manifest: %w", err)
+		}
+		if old.Profile != nil && *old.Profile != profile {
+			return result, errors.New("api: profile changed during generation; retry")
+		}
+		if old.Version != 1 || old.Module != module || old.Entry != entry {
+			return result, errors.New("api: manifest version/module/entry differs; one API entry owns this project")
+		}
+	} else if !errors.Is(err, os.ErrNotExist) {
+		return result, err
+	}
+	if oldData == nil {
+		if err = filepath.WalkDir(root, func(path string, d os.DirEntry, walkErr error) error {
+			if errors.Is(walkErr, os.ErrNotExist) {
+				return nil
+			}
+			if walkErr != nil {
+				return walkErr
+			}
+			if d.IsDir() && d.Name() == ".git" {
+				return filepath.SkipDir
+			}
+			if !d.IsDir() && strings.HasSuffix(d.Name(), ".go") {
+				return fmt.Errorf("api: %s belongs to an existing Go layout; generate into a new directory", path)
+			}
+			return nil
+		}); err != nil {
+			return result, err
+		}
+	}
+	next := manifest{Profile: &profile, Version: 1, Module: module, Entry: entry, Generated: map[string]string{}}
+	for name, data := range generated {
+		next.Generated[name] = digest(data)
+	}
+	var changes []change
+	// Check ALL previous outputs, even stale ones, before writing any new file.
+	for name, hash := range old.Generated {
+		if !ownedPath(name) {
+			return result, fmt.Errorf("api: invalid owned path %q", name)
+		}
+		if err = safePath(root, name); err != nil {
+			return result, err
+		}
+		data, e := os.ReadFile(filepath.Join(root, filepath.FromSlash(name)))
+		if errors.Is(e, os.ErrNotExist) {
+			continue
+		}
+		if e != nil {
+			return result, e
+		}
+		if digest(data) != hash {
+			return result, fmt.Errorf("api: generated file %s was edited; move custom code into developer-owned files before regenerating", name)
+		}
+		if _, exists := generated[name]; !exists {
+			info, _ := os.Stat(filepath.Join(root, filepath.FromSlash(name)))
+			changes = append(changes, change{name: name, before: data, existed: true, remove: true, mode: info.Mode().Perm()})
+			result.Removed = append(result.Removed, name)
+		}
+	}
+	paths := make([]string, 0, len(names))
+	for name := range names {
+		paths = append(paths, name)
+	}
+	sort.Strings(paths)
+	for _, name := range paths {
+		target := filepath.Join(root, filepath.FromSlash(name))
+		current, err := os.ReadFile(target)
+		exists := err == nil
+		if err != nil && !errors.Is(err, os.ErrNotExist) {
+			return result, err
+		}
+		content, isGenerated := generated[name]
+		if !isGenerated {
+			content = seeds[name]
+		}
+		if exists && !isGenerated {
+			result.Preserved = append(result.Preserved, name)
+			continue
+		}
+		if exists && isGenerated {
+			if _, owned := old.Generated[name]; !owned {
+				return result, fmt.Errorf("api: refusing to adopt existing unowned file %s", name)
+			}
+		}
+		if isGenerated {
+			result.Generated = append(result.Generated, name)
+		} else {
+			result.Created = append(result.Created, name)
+		}
+		if exists && bytes.Equal(current, content) {
+			continue
+		}
+		mode := os.FileMode(0644)
+		if exists {
+			info, e := os.Stat(target)
+			if e != nil {
+				return result, e
+			}
+			mode = info.Mode().Perm()
+		}
+		changes = append(changes, change{name: name, before: current, after: content, existed: exists, mode: mode})
+	}
+	data, err := json.MarshalIndent(next, "", "  ")
+	if err != nil {
+		return result, err
+	}
+	data = append(data, '\n')
+	if !bytes.Equal(oldData, data) {
+		changes = append(changes, change{name: manifestPath, before: oldData, after: data, existed: oldData != nil, mode: 0644})
+	}
+	sort.Strings(result.Removed)
+	for _, c := range changes {
+		action := "create"
+		if c.remove {
+			action = "remove"
+		} else if c.existed {
+			action = "update"
+		}
+		result.Changes = append(result.Changes, FileChange{Path: c.name, Action: action})
+	}
+	sort.Slice(result.Changes, func(i, j int) bool { return result.Changes[i].Path < result.Changes[j].Path })
+	if dryRun {
+		return result, nil
+	}
+	if check {
+		if len(changes) > 0 {
+			var stale []string
+			for _, c := range changes {
+				stale = append(stale, c.name)
+			}
+			sort.Strings(stale)
+			return result, fmt.Errorf("api: generated project is stale: %s", strings.Join(stale, ", "))
+		}
+		return result, nil
+	}
+	// A rollback restores bytes/modes if an ordinary filesystem write fails.
+	// File replacement is atomic; the whole directory is not crash-atomic.
+	var applied []change
+	for _, c := range changes {
+		if err = safePath(root, c.name); err == nil {
+			current, e := os.ReadFile(filepath.Join(root, filepath.FromSlash(c.name)))
+			if c.existed {
+				if e != nil || !bytes.Equal(current, c.before) {
+					err = fmt.Errorf("file changed during generation: %s", c.name)
+				}
+			} else if !errors.Is(e, os.ErrNotExist) {
+				err = fmt.Errorf("file appeared during generation: %s", c.name)
+			}
+		}
+		if err == nil {
+			if c.remove {
+				err = os.Remove(filepath.Join(root, filepath.FromSlash(c.name)))
+			} else {
+				err = atomicWrite(root, c.name, c.after, c.mode)
+			}
+		}
+		if err != nil {
+			for i := len(applied) - 1; i >= 0; i-- {
+				previous := applied[i]
+				var rollback error
+				if previous.existed {
+					rollback = atomicWrite(root, previous.name, previous.before, previous.mode)
+				} else {
+					rollback = os.Remove(filepath.Join(root, filepath.FromSlash(previous.name)))
+				}
+				err = errors.Join(err, rollback)
+			}
+			return result, err
+		}
+		applied = append(applied, c)
+	}
+	return result, nil
+}
+func digest(data []byte) string { sum := sha256.Sum256(data); return hex.EncodeToString(sum[:]) }
+func ownedPath(name string) bool {
+	if name == "internal/handler/responseGen.go" || name == "internal/types/scalarsGen.go" {
+		return true
+	}
+	if name == "internal/apierrors/errorsGen.go" || name == "docs/openapi.json" || name == "internal/types/typesGen.go" || name == "internal/handler/routesGen.go" || name == "internal/handler/openapiGen.go" || name == "internal/middleware/registryGen.go" {
+		return true
+	}
+	return strings.HasPrefix(name, "internal/handler/") && strings.HasSuffix(name, "/handlersGen.go")
+}
+func safePath(root, name string) error {
+	if filepath.IsAbs(name) || strings.Contains(name, "\\") || filepath.ToSlash(filepath.Clean(name)) != name || name == "." || strings.HasPrefix(name, "../") {
+		return fmt.Errorf("api: unsafe output path %q", name)
+	}
+	path := root
+	parts := strings.Split(name, "/")
+	for i, part := range parts {
+		path = filepath.Join(path, part)
+		info, err := os.Lstat(path)
+		if errors.Is(err, os.ErrNotExist) {
+			continue
+		}
+		if err != nil {
+			return err
+		}
+		if info.Mode()&os.ModeSymlink != 0 {
+			return fmt.Errorf("api: refusing symlink %s", path)
+		}
+		if i < len(parts)-1 && !info.IsDir() {
+			return fmt.Errorf("api: expected directory %s", path)
+		}
+		if i == len(parts)-1 && !info.Mode().IsRegular() {
+			return fmt.Errorf("api: expected regular file %s", path)
+		}
+	}
+	return nil
+}
+func atomicWrite(root, name string, data []byte, mode os.FileMode) error {
+	target := filepath.Join(root, filepath.FromSlash(name))
+	if err := os.MkdirAll(filepath.Dir(target), 0755); err != nil {
+		return err
+	}
+	f, err := os.CreateTemp(filepath.Dir(target), ".apiGen-*")
+	if err != nil {
+		return err
+	}
+	defer os.Remove(f.Name())
+	if err = f.Chmod(mode); err == nil {
+		_, err = f.Write(data)
+	}
+	if err == nil {
+		err = f.Sync()
+	}
+	err = errors.Join(err, f.Close())
+	if err != nil {
+		return err
+	}
+	return os.Rename(f.Name(), target)
+}

cmd/go-omni/main.go

@@ -7,6 +7,7 @@ import (
 	"path/filepath"
 	"strings"
 
+	"git.yuntuo.hk/k2safe/go-omni/cmd/go-omni/apigen"
 	"git.yuntuo.hk/k2safe/go-omni/cmd/go-omni/scaffold"
 )
 
@@ -17,6 +18,11 @@ func main() {
 	}
 
 	switch os.Args[1] {
+	case "api":
+		if err := runAPI(os.Args[2:]); err != nil {
+			fmt.Fprintln(os.Stderr, "go-omni api:", err)
+			os.Exit(1)
+		}
 	case "migrate":
 		if err := runMigrate(os.Args[2:]); err != nil {
 			fmt.Fprintln(os.Stderr, "go-omni migrate:", err)
@@ -44,9 +50,43 @@ func main() {
 func runNew(args []string) error {
 	options := scaffold.Options{}
 	var target string
+	var apiFile string
 	for index := 0; index < len(args); index++ {
 		arg := args[index]
 		switch {
+		case arg == "--api" || strings.HasPrefix(arg, "--api="):
+			_, value, inline := strings.Cut(arg, "=")
+			if !inline {
+				if index+1 >= len(args) || strings.HasPrefix(args[index+1], "-") {
+					return errors.New("--api requires a file")
+				}
+				index++
+				value = args[index]
+			}
+			if value == "" {
+				return errors.New("--api requires a file")
+			}
+			apiFile = value
+		case arg == "--log-output" || arg == "--log-format" || arg == "--storage" || strings.HasPrefix(arg, "--log-output=") || strings.HasPrefix(arg, "--log-format=") || strings.HasPrefix(arg, "--storage="):
+			name, value, hasValue := strings.Cut(arg, "=")
+			if !hasValue {
+				if index+1 >= len(args) || strings.HasPrefix(args[index+1], "--") {
+					return fmt.Errorf("%s requires a value", name)
+				}
+				index++
+				value = args[index]
+			}
+			if strings.TrimSpace(value) == "" {
+				return fmt.Errorf("%s requires a value", name)
+			}
+			switch name {
+			case "--log-output":
+				options.LogOutput = value
+			case "--log-format":
+				options.LogFormat = value
+			case "--storage":
+				options.Storage = value
+			}
 		case arg == "--force":
 			options.Force = true
 		case arg == "--database":
@@ -98,10 +138,26 @@ func runNew(args []string) error {
 	if target == "" {
 		return errors.New("project directory is required")
 	}
-	if options.Module == "" {
+	if options.Module == "" && apiFile == "" {
 		options.Module = filepath.Base(filepath.Clean(target))
 	}
 	options.Dir = target
+	if apiFile != "" {
+		if options.Force {
+			return errors.New("--api protects existing business code and does not accept --force")
+		}
+		_, err := apigen.Generate(apigen.Options{API: apiFile, Dir: target, Module: options.Module, FrameworkDir: options.FrameworkDir, FrameworkVersion: options.FrameworkVersion, LogOutput: options.LogOutput, LogFormat: options.LogFormat, Database: options.Database, Storage: options.Storage})
+		if err != nil {
+			return err
+		}
+		fmt.Printf("created API project %s; implement internal/service operations\n", filepath.Clean(target))
+		return nil
+	}
+	if _, err := os.Lstat(filepath.Join(target, ".goOmni", "apiManifest.json")); err == nil {
+		return errors.New("this is an API project; use api generate instead of the CRUD/module starter")
+	} else if !errors.Is(err, os.ErrNotExist) {
+		return err
+	}
 	if err := scaffold.Generate(options); err != nil {
 		return err
 	}
@@ -115,10 +171,19 @@ func usage() {
 	fmt.Fprintln(os.Stderr, "Usage:")
 	fmt.Fprintln(os.Stderr, "  go-omni migrate [--dir migrations] [--apply] [--dsn-env GO_OMNI_DB_DSN]")
 	fmt.Fprintln(os.Stderr, "  go-omni new [--module <module>] [--force] <directory>")
+	fmt.Fprintln(os.Stderr, "  go-omni new --api <file.api> [--module <module>] <directory>")
+	fmt.Fprintln(os.Stderr, "  go-omni api new [--module <module>] <directory>  Create a runnable API project")
+	fmt.Fprintln(os.Stderr, "  go-omni api generate [--api <file.api>] [--dir <project>] [--check|--dry-run]")
+	fmt.Fprintln(os.Stderr, "  go-omni api inspect [--api <file.api>]  Show routes, auth and business errors")
+	fmt.Fprintln(os.Stderr, "  go-omni api export [--api <file.api>]   Write OpenAPI JSON to stdout")
+	fmt.Fprintln(os.Stderr, "  go-omni api validate --api <file.api>  Validate definitions and OpenAPI")
 	fmt.Fprintln(os.Stderr, "  go-omni add <name> [--dir <project>]  Generate an isolated business module")
 	fmt.Fprintln(os.Stderr, "  --framework-version <version>  Pin a remote framework version (defaults to CLI version)")
 	fmt.Fprintln(os.Stderr, "  --framework-dir <directory>    Use a local framework checkout")
-	fmt.Fprintln(os.Stderr, "  --database <memory|mysql>       Select generated storage (default memory)")
+	fmt.Fprintln(os.Stderr, "  --database <none|memory|mysql>       API defaults to none; CRUD defaults to memory")
+	fmt.Fprintln(os.Stderr, "  --log-output <stdout|stderr|file>  Generate configured logging (default stderr)")
+	fmt.Fprintln(os.Stderr, "  --log-format <json|text>          Select structured log format (default json)")
+	fmt.Fprintln(os.Stderr, "  --storage <none|local|s3|r2|oss>   Select optional storage adapter (default none)")
 }
 
 func runAdd(args []string) error {

cmd/go-omni/main_test.go

@@ -73,3 +73,28 @@ func TestNewMySQLDatabaseOptions(t *testing.T) {
 		}
 	}
 }
+
+func TestModuleOptionCLI(t *testing.T) {
+	for _, flags := range [][]string{
+		{"--log-output", "file", "--log-format", "json", "--storage", "local"},
+		{"--log-output=stdout", "--log-format=text", "--storage=none"},
+	} {
+		project := filepath.Join(t.TempDir(), "demo")
+		args := append([]string{"--module", "example.com/demo"}, flags...)
+		if err := runNew(append(args, project)); err != nil {
+			t.Fatal(err)
+		}
+		if _, err := os.Stat(filepath.Join(project, "etc/config.yaml")); err != nil {
+			t.Fatal(err)
+		}
+	}
+	for _, args := range [][]string{
+		{"--storage"}, {"--storage="}, {"--storage", "--force"},
+		{"--log-output"}, {"--log-output="}, {"--log-format="},
+		{"--storage", "unknown", "demo"}, {"--log-format", "xml", "demo"},
+	} {
+		if err := runNew(args); err == nil {
+			t.Fatal("invalid module option accepted", args)
+		}
+	}
+}

cmd/go-omni/scaffold/apiInfrastructure.go

@@ -0,0 +1,29 @@
+package scaffold
+
+import (
+	"fmt"
+	"strings"
+)
+
+// APIInfrastructure renders shared infrastructure without inventing business
+// tables or routes. The API generator applies these as developer-owned seeds.
+func APIInfrastructure(module, database, storage, logOutput, logFormat string) (map[string][]byte, error) {
+	data := templateData{Module: module, Database: database, Storage: storage, LogOutput: logOutput, LogFormat: logFormat, API: true, Modules: true}
+	files := map[string]string{
+		"internal/settings/config.go":        "templates/modules-settings.go.tmpl",
+		"etc/config.yaml":                    "templates/modules-config.yaml.tmpl",
+		"internal/servicecontext/context.go": "templates/api-context.go.tmpl",
+	}
+	if storage != "none" {
+		files["internal/servicecontext/storage.go"] = "templates/modules-storage.go.tmpl"
+	}
+	result := make(map[string][]byte, len(files))
+	for name, source := range files {
+		content, err := render(source, data)
+		if err != nil {
+			return nil, fmt.Errorf("render %s: %w", name, err)
+		}
+		result[name] = []byte(strings.TrimRight(content, "\n") + "\n")
+	}
+	return result, nil
+}

cmd/go-omni/scaffold/moduleProfiles_test.go

@@ -0,0 +1,143 @@
+package scaffold
+
+import (
+	"context"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strconv"
+	"strings"
+	"testing"
+	"time"
+)
+
+type moduleProfile struct{ database, storage, output, format string }
+
+var moduleProfiles = []moduleProfile{
+	{"memory", "none", "stdout", "json"},
+	{"memory", "local", "file", "json"},
+	{"memory", "s3", "stdout", "text"},
+	{"memory", "r2", "stderr", "json"},
+	{"memory", "oss", "stderr", "text"},
+	{"mysql", "none", "file", "text"},
+	{"mysql", "local", "stdout", "json"},
+	{"mysql", "s3", "file", "text"},
+	{"mysql", "r2", "stderr", "text"},
+	{"mysql", "oss", "file", "json"},
+}
+
+func generateProfile(t *testing.T, p moduleProfile) string {
+	t.Helper()
+	project := filepath.Join(t.TempDir(), "project")
+	if err := Generate(Options{Dir: project, Module: "example.com/profile", FrameworkDir: frameworkRoot(t), Database: p.database, Storage: p.storage, LogOutput: p.output, LogFormat: p.format}); err != nil {
+		t.Fatal(err)
+	}
+	return project
+}
+func TestGenerateModuleProfiles(t *testing.T) {
+	for _, p := range moduleProfiles {
+		t.Run(p.database+"/"+p.storage, func(t *testing.T) {
+			project := generateProfile(t, p)
+			for _, name := range []string{"etc/config.yaml", "internal/settings/config.go", "MODULES.md", ".gitignore"} {
+				if _, err := os.Stat(filepath.Join(project, name)); err != nil {
+					t.Fatal(err)
+				}
+			}
+			_, err := os.Stat(filepath.Join(project, "internal/handler/files.go"))
+			if p.storage == "none" && !os.IsNotExist(err) {
+				t.Fatal("unselected storage was emitted")
+			}
+			if p.storage != "none" && err != nil {
+				t.Fatal(err)
+			}
+			module, err := os.ReadFile(filepath.Join(project, "go.mod"))
+			if err != nil {
+				t.Fatal(err)
+			}
+			pieces := strings.Split(string(module), "=> ")
+			if len(pieces) != 2 {
+				t.Fatal("local replace missing")
+			}
+			relative, err := strconv.Unquote(strings.TrimSpace(pieces[1]))
+			if err != nil {
+				t.Fatal(err)
+			}
+			if _, err = os.Stat(filepath.Join(project, relative, "go.mod")); err != nil {
+				t.Fatal("replacement does not resolve", err)
+			}
+			cfg, _ := os.ReadFile(filepath.Join(project, "etc/config.yaml"))
+			if strings.Contains(string(cfg), "secretKey:") || strings.Contains(string(cfg), "filesToken:") {
+				t.Fatal("secret defaults emitted")
+			}
+		})
+	}
+}
+func TestModuleOptionsRejectBeforeWriting(t *testing.T) {
+	for _, options := range []Options{
+		{LogOutput: "invalid"}, {LogFormat: "xml"}, {Storage: "ftp"},
+		{Storage: "local", FrameworkVersion: "v0.6.0-preview"},
+		{Module: "example.com/x\nrequire malicious v1.0.0"},
+	} {
+		options.Dir = filepath.Join(t.TempDir(), "project")
+		if options.Module == "" {
+			options.Module = "example.com/profile"
+		}
+		if err := Generate(options); err == nil {
+			t.Fatalf("invalid options accepted: %+v", options)
+		}
+		if _, err := os.Stat(options.Dir); !os.IsNotExist(err) {
+			t.Fatal("invalid options touched target")
+		}
+	}
+}
+func TestCanonicalPathBeforeDirectoryExists(t *testing.T) {
+	parent := t.TempDir()
+	alias := filepath.Join(t.TempDir(), "alias")
+	if err := os.Symlink(parent, alias); err != nil {
+		t.Skip(err)
+	}
+	path := filepath.Join(alias, "new", "nested")
+	if got, want := canonicalPath(path), filepath.Join(canonicalPath(parent), "new", "nested"); got != want {
+		t.Fatalf("%s != %s", got, want)
+	}
+}
+
+// Compile consuming modules, then run their generated tests. No provider account
+// is used: cloud constructors are checked offline, file workflows use Local.
+func TestModuleProfilesIntegration(t *testing.T) {
+	if os.Getenv("GO_OMNI_SCAFFOLD_INTEGRATION") != "1" {
+		t.Skip("set GO_OMNI_SCAFFOLD_INTEGRATION=1 for generated-profile tests")
+	}
+	for _, p := range moduleProfiles {
+		t.Run(p.database+"/"+p.storage, func(t *testing.T) {
+			project := generateProfile(t, p)
+			ctx, cancel := context.WithTimeout(context.Background(), 2*time.Minute)
+			defer cancel()
+			cmd := exec.CommandContext(ctx, "go", "test", "-mod=mod", "-race", "-p=2", "-count=1", "-timeout=60s", "./...")
+			cmd.Dir = project
+			cmd.Env = append(os.Environ(), "GOWORK=off", "GOMAXPROCS=2", "GO_OMNI_TEST_MYSQL_DSN=")
+			if output, err := cmd.CombinedOutput(); err != nil {
+				t.Fatalf("generated %s/%s: %v\n%s", p.database, p.storage, err, output)
+			}
+		})
+	}
+}
+
+func TestForceRejectsRemovedDependenciesWithoutTouchingCode(t *testing.T) {
+	project := generateProfile(t, moduleProfile{"mysql", "local", "file", "json"})
+	path := filepath.Join(project, "cmd/server/main.go")
+	before, err := os.ReadFile(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err = Generate(Options{Dir: project, Module: "example.com/profile", FrameworkDir: frameworkRoot(t), Force: true, Storage: "none"}); err == nil {
+		t.Fatal("incompatible force overwrite accepted")
+	}
+	after, _ := os.ReadFile(path)
+	if string(after) != string(before) {
+		t.Fatal("failed profile switch changed code")
+	}
+	if err = Generate(Options{Dir: project, Module: "example.com/profile", FrameworkDir: frameworkRoot(t), Force: true, Database: "mysql", Storage: "local", LogOutput: "stdout"}); err != nil {
+		t.Fatal("compatible force overwrite rejected", err)
+	}
+}

cmd/go-omni/scaffold/scaffold.go

@@ -12,6 +12,9 @@ import (
 	"strconv"
 	"strings"
 	"text/template"
+
+	"golang.org/x/mod/module"
+	"golang.org/x/mod/semver"
 )
 
 //go:embed templates moduleTemplates
@@ -24,6 +27,9 @@ type Options struct {
 	FrameworkDir     string
 	FrameworkVersion string
 	Database         string
+	LogOutput        string
+	LogFormat        string
+	Storage          string
 	Force            bool
 }
 
@@ -48,6 +54,31 @@ func Generate(options Options) error {
 	if strings.TrimSpace(options.Module) == "" {
 		return errors.New("module path is required")
 	}
+	if err := module.CheckImportPath(options.Module); err != nil {
+		return fmt.Errorf("invalid module path: %w", err)
+	}
+	modules := options.LogOutput != "" || options.LogFormat != "" || options.Storage != ""
+	logOutput, logFormat, storage := options.LogOutput, options.LogFormat, options.Storage
+	if logOutput == "" {
+		logOutput = "stderr"
+	}
+	if logFormat == "" {
+		logFormat = "json"
+	}
+	if storage == "" {
+		storage = "none"
+	}
+	if logOutput != "stdout" && logOutput != "stderr" && logOutput != "file" {
+		return fmt.Errorf("unsupported log output %q: choose stdout, stderr or file", logOutput)
+	}
+	if logFormat != "json" && logFormat != "text" {
+		return fmt.Errorf("unsupported log format %q: choose json or text", logFormat)
+	}
+	switch storage {
+	case "none", "local", "s3", "r2", "oss":
+	default:
+		return fmt.Errorf("unsupported object storage %q: choose none, local, s3, r2 or oss", storage)
+	}
 	database := strings.ToLower(strings.TrimSpace(options.Database))
 	if database == "" {
 		database = "memory"
@@ -58,6 +89,9 @@ func Generate(options Options) error {
 	version := strings.TrimSpace(options.FrameworkVersion)
 	if version == "" {
 		version = currentFrameworkVersion()
+		if modules && version == defaultFrameworkVersion {
+			version = modulesFrameworkVersion
+		}
 	}
 	if !validFrameworkVersion(version) {
 		return fmt.Errorf("framework version %q must be a complete v0 or v1 semantic version", version)
@@ -70,20 +104,20 @@ func Generate(options Options) error {
 	if err := checkTarget(directory, options.Force); err != nil {
 		return err
 	}
-	if err := os.MkdirAll(directory, 0o755); err != nil {
-		return fmt.Errorf("create project directory: %w", err)
-	}
-
 	// An explicit remote version opts out of automatic local development mode.
 	replace := ""
 	if options.FrameworkDir != "" || options.FrameworkVersion == "" {
 		replace = frameworkReplace(directory, options.FrameworkDir)
 	}
+	if modules && replace == "" && semver.Compare(version, modulesFrameworkVersion) < 0 && version != installedFrameworkVersion() {
+		return fmt.Errorf("module templates require %s or newer; use --framework-dir for unpublished source", modulesFrameworkVersion)
+	}
 	data := templateData{
 		Module:           options.Module,
 		FrameworkVersion: version,
 		FrameworkReplace: replace,
 		Database:         database,
+		Modules:          modules, LogOutput: logOutput, LogFormat: logFormat, Storage: storage,
 	}
 	projectFiles := make(map[string]string, len(files)+3)
 	for path, source := range files {
@@ -94,11 +128,42 @@ func Generate(options Options) error {
 		projectFiles["schema.sql"] = "templates/schema.sql.tmpl"
 		projectFiles["internal/servicecontext/databaseIntegration_test.go"] = "templates/databaseIntegration_test.go.tmpl"
 	}
+	if modules {
+		projectFiles["cmd/server/main.go"] = "templates/modules-main.go.tmpl"
+		projectFiles["internal/settings/config.go"] = "templates/modules-settings.go.tmpl"
+		projectFiles["internal/settings/config_test.go"] = "templates/modules-settings_test.go.tmpl"
+		projectFiles["etc/config.yaml"] = "templates/modules-config.yaml.tmpl"
+		projectFiles[".gitignore"] = "templates/modules-gitignore.tmpl"
+		projectFiles["MODULES.md"] = "templates/modules-README.md.tmpl"
+		if storage != "none" {
+			projectFiles["internal/servicecontext/storage.go"] = "templates/modules-storage.go.tmpl"
+			projectFiles["internal/servicecontext/storage_test.go"] = "templates/modules-storage_test.go.tmpl"
+			projectFiles["internal/service/files.go"] = "templates/modules-filesService.go.tmpl"
+			projectFiles["internal/handler/files.go"] = "templates/modules-filesHandler.go.tmpl"
+			projectFiles["internal/handler/files_test.go"] = "templates/modules-filesHandler_test.go.tmpl"
+		}
+	}
+	if options.Force {
+		// Do not leave old generated Go files that reference dependencies omitted
+		// by this profile, and do not silently delete potentially edited code.
+		for _, path := range []string{"internal/repository/mysql.go", "internal/servicecontext/databaseIntegration_test.go", "schema.sql", "internal/settings/config.go", "internal/settings/config_test.go", "etc/config.yaml", "MODULES.md", "internal/servicecontext/storage.go", "internal/servicecontext/storage_test.go", "internal/service/files.go", "internal/handler/files.go", "internal/handler/files_test.go"} {
+			if _, emitted := projectFiles[path]; emitted {
+				continue
+			}
+			if _, err := os.Lstat(filepath.Join(directory, path)); err == nil {
+				return fmt.Errorf("existing %s conflicts with the selected profile; generate into a new directory instead of removing existing code", path)
+			} else if !errors.Is(err, os.ErrNotExist) {
+				return err
+			}
+		}
+	}
 	paths := make([]string, 0, len(projectFiles))
 	for path := range projectFiles {
 		paths = append(paths, path)
 	}
 	sort.Strings(paths)
+	// Render and format the whole project before touching the target directory.
+	contents := make(map[string]string, len(paths))
 	for _, path := range paths {
 		content, err := render(projectFiles[path], data)
 		if err != nil {
@@ -111,6 +176,9 @@ func Generate(options Options) error {
 			}
 			content = string(formatted)
 		}
+		contents[path] = content
+	}
+	for _, path := range paths {
 		target := filepath.Join(directory, filepath.FromSlash(path))
 		if err := os.MkdirAll(filepath.Dir(target), 0o755); err != nil {
 			return fmt.Errorf("create %s: %w", filepath.Dir(path), err)
@@ -122,7 +190,7 @@ func Generate(options Options) error {
 				return fmt.Errorf("check %s: %w", target, err)
 			}
 		}
-		if err := os.WriteFile(target, []byte(content), 0o644); err != nil {
+		if err := os.WriteFile(target, []byte(contents[path]), 0o644); err != nil {
 			return fmt.Errorf("write %s: %w", target, err)
 		}
 	}
@@ -130,10 +198,15 @@ func Generate(options Options) error {
 }
 
 type templateData struct {
+	API              bool
 	Module           string
 	FrameworkVersion string
 	FrameworkReplace string
 	Database         string
+	Modules          bool
+	LogOutput        string
+	LogFormat        string
+	Storage          string
 }
 
 func render(name string, data templateData) (string, error) {
@@ -202,11 +275,28 @@ func canonicalPath(path string) string {
 	if err != nil {
 		return path
 	}
-	resolved, err := filepath.EvalSymlinks(abs)
-	if err == nil {
-		return resolved
+	// Resolve the nearest existing ancestor too: generation now renders before
+	// creating directories, and macOS /var commonly resolves through /private.
+	candidate := abs
+	var tail []string
+	for {
+		resolved, err := filepath.EvalSymlinks(candidate)
+		if err == nil {
+			for i := len(tail) - 1; i >= 0; i-- {
+				resolved = filepath.Join(resolved, tail[i])
+			}
+			return resolved
+		}
+		if !errors.Is(err, os.ErrNotExist) {
+			return abs
+		}
+		parent := filepath.Dir(candidate)
+		if parent == candidate {
+			return abs
+		}
+		tail = append(tail, filepath.Base(candidate))
+		candidate = parent
 	}
-	return abs
 }
 
 func findFrameworkRoot() string {

cmd/go-omni/scaffold/templates/README.md.tmpl

@@ -1,10 +1,13 @@
 # GoOmni service
 
 This service was generated with `go-omni new`.
+{{if .Modules}}
+**本项目启用了模块化配置，启动步骤和环境变量请先看 [MODULES.md](MODULES.md)。** 配置来自 `etc/config.yaml`，文件模块需要配置环境密钥后启动。
+{{end}}
 
 Framework dependency: `git.yuntuo.hk/k2safe/go-omni {{.FrameworkVersion}}`.
 
-Storage: `{{.Database}}`.
+Database: `{{.Database}}`.
 
 {{if eq .Database "mysql"}}
 先创建业务数据库，再执行项目的建表脚本（替换示例数据库名、账号和地址）：

cmd/go-omni/scaffold/templates/api-context.go.tmpl

@@ -0,0 +1,69 @@
+package servicecontext
+import (
+ "context"
+ "errors"
+ "sync"
+ {{if ne .Storage "none"}}"net/http"
+ "git.yuntuo.hk/k2safe/go-omni/storage"{{end}}
+ {{if eq .Database "mysql"}}"time"
+ "git.yuntuo.hk/k2safe/go-omni/database"
+ "github.com/go-sql-driver/mysql"{{end}}
+ "git.yuntuo.hk/k2safe/go-omni/health"
+ "git.yuntuo.hk/k2safe/go-omni/httpx"
+ "git.yuntuo.hk/k2safe/go-omni/logx"
+ "{{.Module}}/internal/settings"
+ "{{.Module}}/internal/middleware"
+)
+// Context owns infrastructure, while Logger is borrowed from main.
+// Add business repositories here; HTTP contracts do not define database tables.
+type Context struct {
+ Logger *logx.Logger
+ Health *health.Checker
+ Middlewares map[string]httpx.Middleware
+ {{if eq .Database "mysql"}}DB *database.DB{{end}}
+ {{if ne .Storage "none"}}
+ Files storage.Store
+ Uploads *storage.Uploader
+ Downloads storage.Presigner
+ UploadLinks storage.UploadPresigner
+ FileHTTP http.Handler
+ storageClose func()error
+ {{end}}
+ closeMu sync.Mutex
+ closed bool
+ closeOnce sync.Once
+ closeErr error
+}
+// Pass the settings loaded by main. The optional form supports lightweight
+// tests without infrastructure; selected adapters still require valid settings.
+func New(ctx context.Context,logger *logx.Logger,configs ...settings.Config)(result *Context,err error){
+ if ctx==nil{ctx=context.Background()}
+ if err=ctx.Err();err!=nil{return nil,err}
+ if len(configs)>1{return nil,errors.New("expected at most one configuration")}
+ cfg:=settings.Default();if len(configs)==1{cfg=configs[0]}
+ _=cfg
+ checker,err:=health.New();if err!=nil{return nil,err}
+ c:=&Context{Logger:logger,Health:checker,Middlewares:middleware.Defaults()}
+ defer func(){if err!=nil{err=errors.Join(err,c.Close())}}()
+ {{if eq .Database "mysql"}}
+ if err=cfg.Validate();err!=nil{return nil,err}
+ dsn,parseErr:=mysql.ParseDSN(cfg.Database.DSN)
+ if parseErr!=nil || dsn.DBName=="" {return nil,errors.New("GO_OMNI_DB_DSN must contain a valid MySQL database name")}
+ dsn.ParseTime=true;dsn.Loc=time.UTC
+ cfg.Database.DSN=dsn.FormatDSN()
+ c.DB,err=database.Open(ctx,cfg.Database);if err!=nil{return nil,err}
+ if err=checker.Add(health.Probe{Name:"database",Timeout:cfg.Database.PingTimeout,Check:c.DB.Health});err!=nil{return nil,err}
+ {{end}}
+ {{if ne .Storage "none"}}if err=c.InitStorage(ctx,cfg.Storage);err!=nil{return nil,err}{{end}}
+ return c,nil
+}
+// Close is idempotent, including startup failure and graceful shutdown.
+func(c *Context)Close()error{
+ if c==nil{return nil}
+ c.closeMu.Lock();defer c.closeMu.Unlock();c.closed=true
+ c.closeOnce.Do(func(){
+ {{if ne .Storage "none"}}if c.storageClose!=nil{c.closeErr=errors.Join(c.closeErr,c.storageClose())}{{end}}
+ {{if eq .Database "mysql"}}if c.DB!=nil{c.closeErr=errors.Join(c.closeErr,c.DB.Close())}{{end}}
+ })
+ return c.closeErr
+}

cmd/go-omni/scaffold/templates/internal-service-user.go.tmpl

@@ -23,7 +23,10 @@ func (s *Users) Create(ctx context.Context, input model.UserInput) (model.User,
 	if err != nil {
 		return model.User{}, err
 	}
-	return s.services.Users.Create(ctx, input)
+	user, err := s.services.Users.Create(ctx, input)
+ if err != nil { s.services.Logger.ErrorContext(ctx,"user.create.failed","error",err); return model.User{},err }
+ s.services.Logger.InfoContext(ctx,"user.created","userId",user.ID)
+ return user,nil
 }
 
 func (s *Users) Get(ctx context.Context, id int64) (model.User, error) {

cmd/go-omni/scaffold/templates/internal-servicecontext-context.go.tmpl

@@ -2,6 +2,10 @@ package servicecontext
 
 import (
 	"context"
+ {{if and .Modules (ne .Storage "none")}}"errors"
+ "net/http"
+ "sync"
+ "git.yuntuo.hk/k2safe/go-omni/storage"{{end}}
 	{{if eq .Database "mysql"}}"fmt"
 	"time"
 	"git.yuntuo.hk/k2safe/go-omni/database"
@@ -17,6 +21,18 @@ type Context struct {
 	Logger *logx.Logger
 	Users  repository.UserRepository
 	Health *health.Checker
+ {{if and .Modules (ne .Storage "none")}}
+ Files storage.Store
+ Uploads *storage.Uploader
+ Downloads storage.Presigner
+ UploadLinks storage.UploadPresigner
+ FileHTTP http.Handler
+ storageClose func() error
+ closeMu sync.Mutex
+ closed bool
+ closeOnce sync.Once
+ closeErr error
+ {{end}}
 	{{if eq .Database "mysql"}}DB *database.DB{{end}}
 }
 
@@ -61,6 +77,15 @@ func New(ctx context.Context, logger *logx.Logger) (*Context, error) {
 
 // Close is safe to call on startup failure and again during application exit.
 func (c *Context) Close() error {
-	{{if eq .Database "mysql"}}if c != nil && c.DB != nil { return c.DB.Close() }{{end}}
-	return nil
+	{{if and .Modules (ne .Storage "none")}}
+ if c==nil{return nil}
+ c.closeMu.Lock();defer c.closeMu.Unlock()
+ c.closed=true
+ c.closeOnce.Do(func(){
+  if c.storageClose!=nil {c.closeErr=errors.Join(c.closeErr,c.storageClose())}
+  {{if eq .Database "mysql"}}if c.DB!=nil{c.closeErr=errors.Join(c.closeErr,c.DB.Close())}{{end}}
+ })
+ return c.closeErr
+ {{else}}{{if eq .Database "mysql"}}if c != nil && c.DB != nil { return c.DB.Close() }{{end}}{{end}}
+	{{if not (and .Modules (ne .Storage "none"))}}return nil{{end}}
 }

cmd/go-omni/scaffold/templates/modules-README.md.tmpl

@@ -0,0 +1,97 @@
+# 按需装配的日志与文件模块
+
+本项目选用日志输出 `{{.LogOutput}}`、格式 `{{.LogFormat}}`、对象存储 `{{.Storage}}`。数据库选择 `{{.Database}}` 独立于对象存储。
+
+配置入口为 `etc/config.yaml`，通过 `go run ./cmd/server -config /path/to/config.yaml` 指定其他 JSON/YAML 文件；`-config ''` 只用代码默认值和环境变量。优先级：默认值 → 文件 → 非空环境变量。未知字段、无效参数会在监听前拒绝。
+
+```sh
+go mod tidy
+{{if ne .Storage "none"}}# 示例文件接口使用单一共享 Token，不是用户/租户权限系统。
+export GO_OMNI_FILES_TOKEN="$(openssl rand -hex 32)"
+{{if eq .Storage "local"}}# 本地签名密钥需要稳定保存；换密钥后旧链接失效。
+export GO_OMNI_STORAGE_SIGNING_KEY="$(openssl rand -hex 32)"
+{{else}}# 配置当前存储平台已有的桶和凭据，不会自动创建桶。
+export GO_OMNI_STORAGE_BUCKET='your-bucket'
+export GO_OMNI_STORAGE_ACCESS_KEY='your-access-key'
+export GO_OMNI_STORAGE_SECRET_KEY='your-secret-key'
+{{if eq .Storage "s3"}}export GO_OMNI_STORAGE_ENDPOINT='s3.us-east-1.amazonaws.com'
+export GO_OMNI_STORAGE_REGION='us-east-1'
+{{else if eq .Storage "r2"}}export GO_OMNI_STORAGE_ACCOUNT_ID='your-32-character-account-id'
+{{else}}export GO_OMNI_STORAGE_REGION='cn-hangzhou'
+{{end}}{{end}}{{end}}
+go run ./cmd/server
+```
+
+{{if eq .Database "mysql"}}还需按 README 配置独立 MySQL 数据库并应用 schema.sql；应用不自动迁移。{{end}}
+
+默认仅监听 `127.0.0.1:8080`。`GO_OMNI_HTTP_ADDR` 覆盖地址；本地签名 URL 的外部地址通过 `GO_OMNI_STORAGE_PUBLIC_URL` 单独配置，始终以 `/storage/object` 结尾，不使用请求 Host 自动拼接可信链接。
+
+## 日志
+
+业务示例在创建用户/上传文件成功时通过 logx 写结构化日志。Context 原样传递 requestId，框架不自动增加用户、租户等业务字段。文件模式已配置轮转：100 MiB、10 份、7 天、压缩。调整 `server.log` 即可更改；`redactKeys` 可增加业务敏感键。
+
+```sh
+curl -H 'Content-Type: application/json' -H 'X-Request-ID: example-request' \
+  -d '{"name":"Example","email":"example@example.com"}' http://127.0.0.1:8080/users
+```
+
+`GO_OMNI_LOG_LEVEL`、`GO_OMNI_LOG_FORMAT`、`GO_OMNI_LOG_FILE` 覆盖对应项；显式设置 `GO_OMNI_LOG_OUTPUT=stdout` 且未设置 LOG_FILE 时，切换到控制台并关闭文件轮转。慢请求阈值为 500ms，可通过 `GO_OMNI_SLOW_REQUEST_THRESHOLD` 调整。字段脱敏不扫描 msg/error 中的自由文本；不要把凭据或签名 URL 拼到日志中。
+
+{{if ne .Storage "none"}}## 文件示例
+
+Handler → Service → storage 接口；底层构造与连接池集中在 `internal/servicecontext/storage.go`。示例接口要求 `Authorization: Bearer $GO_OMNI_FILES_TOKEN`，它授权这个示例的全部文件，实际业务应替换认证和对象归属检查。存储适配器不承担业务授权。
+
+```sh
+printf 'hello go-omni' > /tmp/goOmniExample.txt
+curl -H "Authorization: Bearer $GO_OMNI_FILES_TOKEN" \
+  -H 'Content-Type: text/plain' -H 'X-Request-ID: file-example' \
+  --data-binary @/tmp/goOmniExample.txt http://127.0.0.1:8080/files
+```
+
+保存响应中 `data.key`，再请求下载链接（把示例 key 替换为返回值）：
+
+```sh
+curl -H "Authorization: Bearer $GO_OMNI_FILES_TOKEN" -H 'Content-Type: application/json' \
+  -d '{"key":"uploads/returned-key"}' http://127.0.0.1:8080/files/downloadLink
+```
+
+返回 `data.url`，在有效期内 GET 即可下载，无需再携带 Token。签发前会检查对象存在；URL 默认 5 分钟有效，不写日志，响应设置 no-store。
+
+需要直传时先申请链接：
+
+```sh
+curl -H "Authorization: Bearer $GO_OMNI_FILES_TOKEN" -H 'Content-Type: application/json' \
+  -d '{"size":13,"contentType":"text/plain"}' http://127.0.0.1:8080/files/uploadLink
+```
+
+响应包括随机 `data.key` 和 `data.request`（method/url/headers/expiresAt）。按返回的 method 和 headers 用原始文件字节上传到 URL；不能额外包 FormData。浏览器自动填写 Content-Length，其余签名 Header 原样发送；云桶需配置允许业务域名的 CORS。云端直传只绑定声明类型，实际内容需上传后验证；本地和 API 中转上传会检查允许类型及前缀嗅探结果。未完成内容验证前不要把暂存文件当作可信文件公开。
+
+| 参数 | 默认值 / 环境变量 |
+| --- | --- |
+| 大小 | 32 MiB / GO_OMNI_STORAGE_MAX_BYTES |
+| 类型 | text/plain、image/png、image/jpeg、application/pdf / GO_OMNI_STORAGE_CONTENT_TYPES（逗号分隔） |
+| 链接有效期 | 5m / GO_OMNI_STORAGE_LINK_TTL（1s..1h） |
+| 请求超时 | 30s / GO_OMNI_STORAGE_REQUEST_TIMEOUT（>0 且 <=5m） |
+| 本地目录 | var/files / GO_OMNI_STORAGE_ROOT |
+| 本地外部 URL | http://127.0.0.1:8080/storage/object / GO_OMNI_STORAGE_PUBLIC_URL |
+| 云配置 | GO_OMNI_STORAGE_ENDPOINT、REGION、BUCKET、ACCOUNT_ID、SECURE |
+| 环境密钥 | GO_OMNI_FILES_TOKEN、GO_OMNI_STORAGE_SIGNING_KEY、GO_OMNI_STORAGE_ACCESS_KEY、SECRET_KEY、SESSION_TOKEN |
+
+全部 JSON/YAML 字段使用 lowerCamelCase。密钥字段仅允许环境变量，配置文件中写入会报未知字段；不要把运行环境文件提交到仓库。S3 的 endpoint 为 host[:port]，OSS 的可选 endpoint 为 HTTPS origin；R2 从 accountId 派生官方 endpoint，region 为 auto。仅 S3/MinIO 的本地测试可设置 SECURE=false。
+
+错误响应：未授权 401、无 Content-Length 411、超限 413、类型不允许 415、长度不符/非法 key 400、对象不存在 404、存储超时 504，其余内部错误统一隐藏细节。底层签名入口遵循存储协议返回 201/403 等状态，流式传输且访问日志保留实际状态。
+
+云客户端只在组合处创建，使用专用有界连接池；配置正确不代表桶和网络已经可用，首次真实调用仍可能失败。不创建桶、不修改桶权限、不初始化任何业务数据库。更换平台时替换组合处适配器，业务 Service 接口保持不变。
+{{end}}
+
+## 生命周期与验证
+
+启动失败会清理已创建资源；SIGINT/SIGTERM 后先等待 HTTP 请求退出，再关闭服务依赖，最后关闭日志。只关闭项目自己创建的资源，不关闭全局默认 HTTP Transport。
+
+```sh
+go test -race ./...
+go build -o server ./cmd/server
+./server
+```
+
+生成的测试覆盖配置优先级/校验{{if ne .Storage "none"}}、资源关闭幂等性和借用日志所有权、上传与临时链接、签名篡改、限额/类型错误。业务测试使用临时 Local，不访问云账号；云端配置需另做实网验收{{end}}。基础用户 CRUD 示例仍未启用认证，部署前按业务需要替换。

cmd/go-omni/scaffold/templates/modules-config.yaml.tmpl

@@ -0,0 +1,46 @@
+# Non-secret settings only. Environment variables override these values.
+server:
+  address: '127.0.0.1:8080'
+  enableLogger: true
+  slowRequestThreshold: 500ms
+  shutdownTimeout: 10s
+  log:
+    service: {{printf "%q" .Module}}
+    level: info
+    format: {{.LogFormat}}
+{{if eq .LogOutput "file"}}    file: './var/log/server.log'
+    rotation:
+      enabled: true
+      maxSizeMb: 100
+      maxBackups: 10
+      maxAgeDays: 7
+      compress: true
+{{else}}    output: {{.LogOutput}}
+{{end}}    redactKeys: []
+{{if ne .Storage "none"}}storage:
+  provider: {{.Storage}}
+  maxBytes: 33554432
+  contentTypes: ['text/plain', 'image/png', 'image/jpeg', 'application/pdf']
+  linkTtl: 5m
+  requestTimeout: 30s
+{{if eq .Storage "local"}}  root: './var/files'
+  publicUrl: 'http://127.0.0.1:8080/storage/object'
+{{else}}  bucket: '' # set GO_OMNI_STORAGE_BUCKET
+  secure: true
+{{if eq .Storage "r2"}}  accountId: '' # set GO_OMNI_STORAGE_ACCOUNT_ID
+  region: auto
+{{else if eq .Storage "s3"}}  endpoint: '' # set GO_OMNI_STORAGE_ENDPOINT (host[:port])
+  region: us-east-1
+{{else}}  region: cn-hangzhou
+  endpoint: '' # empty uses the official regional endpoint
+{{end}}{{end}}{{end}}
+
+{{if and .API (eq .Database "mysql")}}database:
+  driver: mysql
+  maxOpenConns: 10
+  maxIdleConns: 5
+  connMaxLifetime: 30m
+  connMaxIdleTime: 5m
+  pingTimeout: 5s
+# GO_OMNI_DB_DSN supplies the secret connection string.
+{{end}}

cmd/go-omni/scaffold/templates/modules-filesHandler.go.tmpl

@@ -0,0 +1,86 @@
+package handler
+
+import (
+ "context"
+ "crypto/subtle"
+ "errors"
+ "net/http"
+ "time"
+
+ omni "git.yuntuo.hk/k2safe/go-omni"
+ "git.yuntuo.hk/k2safe/go-omni/storage"
+ "{{.Module}}/internal/service"
+)
+
+type Files struct {service *service.Files; maxBytes int64; timeout time.Duration}
+func NewFiles(service *service.Files,maxBytes int64,timeout time.Duration)*Files{return &Files{service:service,maxBytes:maxBytes,timeout:timeout}}
+
+// RegisterRoutes protects example control endpoints with one shared demo token.
+// Replace this gate with project authentication and object ownership checks.
+// Signed object URLs carry their own short-lived authorization.
+func (h *Files) RegisterRoutes(application *omni.App,token string,signed http.Handler)error {
+ if len(token)<32{return errors.New("file example requires a token of at least 32 bytes")}
+ bounded:=func(next omni.Handler)omni.Handler{return func(c *omni.Context)error{
+  ctx,cancel:=context.WithTimeout(c.Context(),h.timeout);defer cancel();c.WithContext(ctx);return next(c)
+ }}
+ authorized:=func(next omni.Handler)omni.Handler{return func(c *omni.Context)error{
+  if len(c.Request().Header.Values("Authorization"))!=1 || subtle.ConstantTimeCompare([]byte(c.Header("Authorization")),[]byte("Bearer "+token))!=1{return omni.Unauthorized("UNAUTHORIZED","invalid file access token")}
+  return next(c)
+ }}
+ group:=application.Group("/files",authorized,bounded)
+ group.POST("",h.Upload)
+ group.POST("/uploadLink",h.UploadLink)
+ group.POST("/downloadLink",h.DownloadLink)
+ if signed!=nil {application.Any("/storage/object",func(c *omni.Context)error{
+  signed.ServeHTTP(contextWriter{c},c.Request());return nil
+ },bounded)}
+ return nil
+}
+func (h *Files) Upload(c *omni.Context)error {
+ size:=c.Request().ContentLength
+ if size<0{return omni.NewError(http.StatusLengthRequired,"LENGTH_REQUIRED","Content-Length is required")}
+ if size>h.maxBytes{return omni.NewError(http.StatusRequestEntityTooLarge,"FILE_TOO_LARGE","file exceeds upload limit")}
+ body:=http.MaxBytesReader(c.Raw(),c.Request().Body,h.maxBytes)
+ defer body.Close()
+ info,err:=h.service.Upload(c.Context(),body,size,c.Header("Content-Type"))
+ if err!=nil{return fileError(err)}
+ return c.Created(info)
+}
+func (h *Files) UploadLink(c *omni.Context)error {
+ var input struct{Size int64 `json:"size" binding:"gte=0"`;ContentType string `json:"contentType" binding:"required,max=256"`}
+ if err:=c.BindJSON(&input);err!=nil{return err}
+ link,err:=h.service.UploadLink(c.Context(),input.Size,input.ContentType)
+ if err!=nil{return fileError(err)}
+ c.SetResponseHeader("Cache-Control","no-store")
+ return c.OK(link)
+}
+func (h *Files) DownloadLink(c *omni.Context)error {
+ var input struct{Key string `json:"key" binding:"required,max=1024"`}
+ if err:=c.BindJSON(&input);err!=nil{return err}
+ if err:=storage.Check(c.Context(),input.Key);err!=nil{return omni.BadRequest("INVALID_KEY","invalid object key")}
+ link,err:=h.service.DownloadLink(c.Context(),input.Key)
+ if err!=nil{return fileError(err)}
+ c.SetResponseHeader("Cache-Control","no-store")
+ return c.OK(map[string]string{"url":link})
+}
+func fileError(err error)error {
+ var limit *http.MaxBytesError
+ switch {
+ case errors.Is(err,storage.ErrTooLarge),errors.As(err,&limit):return omni.NewError(413,"FILE_TOO_LARGE","file exceeds upload limit").WithCause(err)
+ case errors.Is(err,storage.ErrContentType):return omni.NewError(415,"CONTENT_TYPE_NOT_ALLOWED","file content type is not allowed").WithCause(err)
+ case errors.Is(err,storage.ErrSizeMismatch):return omni.BadRequest("SIZE_MISMATCH","file size does not match Content-Length").WithCause(err)
+ case errors.Is(err,storage.ErrNotFound):return omni.NotFound("FILE_NOT_FOUND","file was not found").WithCause(err)
+ case errors.Is(err,context.DeadlineExceeded):return omni.NewError(504,"STORAGE_TIMEOUT","storage operation timed out").WithCause(err)
+ default:return err
+ }
+}
+
+// Track raw streaming handler responses through Omni so access logs retain the
+// actual status (including failed signatures), without buffering object bodies.
+type contextWriter struct{ctx *omni.Context}
+func (w contextWriter) Header()http.Header{return w.ctx.Raw().Header()}
+func (w contextWriter) WriteHeader(status int){_ = w.ctx.WriteResponse(status,nil,nil)}
+func (w contextWriter) Write(data []byte)(int,error){
+ if !w.ctx.Responded(){if err:=w.ctx.WriteResponse(http.StatusOK,nil,nil);err!=nil{return 0,err}}
+ return w.ctx.Raw().Write(data)
+}

cmd/go-omni/scaffold/templates/modules-filesHandler_test.go.tmpl

@@ -0,0 +1,75 @@
+package handler_test
+
+import (
+ "bytes"
+ "context"
+ "encoding/json"
+ "io"
+ "net/http"
+ "net/http/httptest"
+ "net/url"
+ "strings"
+ "testing"
+ "time"
+
+ omni "git.yuntuo.hk/k2safe/go-omni"
+ "git.yuntuo.hk/k2safe/go-omni/logx"
+ "git.yuntuo.hk/k2safe/go-omni/storage"
+ "git.yuntuo.hk/k2safe/go-omni/storage/local"
+ "{{.Module}}/internal/handler"
+ "{{.Module}}/internal/service"
+)
+
+// Exercise business code using Local even when production selects a cloud
+// adapter. These tests do not use cloud accounts or network credentials.
+func TestFileUploadAndLinks(t *testing.T){
+ files,err:=local.New(t.TempDir(),64);if err!=nil{t.Fatal(err)}
+ policy:=storage.UploadPolicy{MaxBytes:64,ContentTypes:[]string{"text/plain"}}
+ signer,err:=storage.NewUploadSigner(files,"http://localhost/storage/object",bytes.Repeat([]byte{1},32),policy);if err!=nil{t.Fatal(err)}
+ uploader,err:=storage.NewUploader(files,policy);if err!=nil{t.Fatal(err)}
+ var logs bytes.Buffer
+ logger,err:=logx.New(logx.Config{Writer:&logs});if err!=nil{t.Fatal(err)}
+ logx.SetDefault(logger);defer logx.SetDefault(nil)
+ app:=omni.New(omni.WithLogger(true))
+ token:=strings.Repeat("t",32)
+ svc:=service.NewFiles(files,uploader,signer,signer,logger,time.Minute)
+ if err=handler.NewFiles(svc,64,time.Second).RegisterRoutes(app,token,signer);err!=nil{t.Fatal(err)}
+ request:=func(method,path,body,contentType string,authorized bool)*httptest.ResponseRecorder{
+  r:=httptest.NewRequest(method,path,strings.NewReader(body));r.Header.Set("Content-Type",contentType);r.Header.Set("X-Request-ID","upload-test")
+  if authorized{r.Header.Set("Authorization","Bearer "+token)}
+  w:=httptest.NewRecorder();app.ServeHTTP(w,r);return w
+ }
+ if w:=request("POST","/files","hello","text/plain",false);w.Code!=401{t.Fatal(w.Code)}
+ w:=request("POST","/files","hello","text/plain",true)
+ var saved struct{Data storage.Info}
+ if w.Code!=201 || json.Unmarshal(w.Body.Bytes(),&saved)!=nil || saved.Data.Size!=5{t.Fatal(w.Code,w.Body.String())}
+ raw,_:=json.Marshal(map[string]string{"key":saved.Data.Key})
+ w=request("POST","/files/downloadLink",string(raw),"application/json",true)
+ var download struct{Data struct{URL string}}
+ if w.Code!=200 || json.Unmarshal(w.Body.Bytes(),&download)!=nil{t.Fatal(w.Code,w.Body.String())}
+ w=request("GET",download.Data.URL,"","",false)
+ if w.Code!=200 || w.Body.String()!="hello"{t.Fatal(w.Code,w.Body.String())}
+ u,_:=url.Parse(download.Data.URL);q:=u.Query();q.Set("signature","tampered");u.RawQuery=q.Encode()
+ if w=request("GET",u.String(),"","",false);w.Code!=403{t.Fatal(w.Code)}
+ for _,tc:=range []struct{path,body,contentType string;status int}{
+  {"/files",strings.Repeat("x",65),"text/plain",413},
+  {"/files","hello","image/png",415},
+  {"/files","<html>hello</html>","text/plain",415},
+  {"/files/downloadLink",`{"key":"../bad"}`,"application/json",400},
+  {"/files/downloadLink",`{"key":"missing"}`,"application/json",404},
+  {"/files/uploadLink",`{"size":65,"contentType":"text/plain"}`,"application/json",413},
+  {"/files/uploadLink",`{"size":5,"contentType":"image/png"}`,"application/json",415},
+ }{if w=request("POST",tc.path,tc.body,tc.contentType,true);w.Code!=tc.status{t.Fatal(tc.path,w.Code,w.Body.String())}}
+ w=request("POST","/files/uploadLink",`{"size":5,"contentType":"text/plain"}`,"application/json",true)
+ var direct struct{Data service.FileUploadLink}
+ if w.Code!=200 || json.Unmarshal(w.Body.Bytes(),&direct)!=nil{t.Fatal(w.Code,w.Body.String())}
+ if w=request("PUT",direct.Data.Request.URL,"world","text/plain",false);w.Code!=201{t.Fatal(w.Code,w.Body.String())}
+ object,err:=files.Get(context.Background(),direct.Data.Key);if err!=nil{t.Fatal(err)};body,err:=io.ReadAll(object.Body);object.Body.Close();if err!=nil || string(body)!="world"{t.Fatal(err,string(body))}
+ decoder:=json.NewDecoder(&logs);sawBusiness,sawDenied:=false,false
+ for {var entry map[string]any;err:=decoder.Decode(&entry);if err==io.EOF{break};if err!=nil{t.Fatal(err)}
+  if entry["requestId"]!="upload-test"{t.Fatal("lost request correlation")}
+  if entry["msg"]=="file.uploaded"{sawBusiness=true}
+  if entry["msg"]=="http.request" && entry["path"]=="/storage/object" && entry["status"]==float64(http.StatusForbidden){sawDenied=true}
+ }
+ if !sawBusiness || !sawDenied{t.Fatal("business log or signed-handler status missing")}
+}

cmd/go-omni/scaffold/templates/modules-filesService.go.tmpl

@@ -0,0 +1,61 @@
+package service
+
+import (
+ "context"
+ "crypto/rand"
+ "encoding/hex"
+ "io"
+ "time"
+
+ "git.yuntuo.hk/k2safe/go-omni/logx"
+ "git.yuntuo.hk/k2safe/go-omni/storage"
+)
+
+// Files borrows provider-neutral capabilities; it never creates or closes clients.
+// Authentication/ownership rules belong to this project, outside storage adapters.
+type Files struct {
+ store storage.Store
+ uploader *storage.Uploader
+ downloads storage.Presigner
+ uploadLinks storage.UploadPresigner
+ logger *logx.Logger
+ ttl time.Duration
+}
+func NewFiles(store storage.Store,uploader *storage.Uploader,downloads storage.Presigner,uploadLinks storage.UploadPresigner,logger *logx.Logger,ttl time.Duration)*Files{
+ return &Files{store:store,uploader:uploader,downloads:downloads,uploadLinks:uploadLinks,logger:logger.With("component","files"),ttl:ttl}
+}
+func newFileKey()(string,error){
+ var id [16]byte
+ if _,err:=rand.Read(id[:]);err!=nil{return "",err}
+ return "uploads/"+hex.EncodeToString(id[:]),nil
+}
+func (s *Files) Upload(ctx context.Context,body io.Reader,size int64,contentType string)(storage.Info,error){
+ key,err:=newFileKey();if err!=nil{return storage.Info{},err}
+ info,err:=s.uploader.Put(ctx,key,body,size,contentType)
+ if err!=nil{s.logger.WarnContext(ctx,"file.upload.failed","error",err);return storage.Info{},err}
+ s.logger.InfoContext(ctx,"file.uploaded","key",info.Key,"size",info.Size,"contentType",info.ContentType)
+ return info,nil
+}
+type FileUploadLink struct {
+ Key string `json:"key"`
+ Request storage.UploadRequest `json:"request"`
+}
+func (s *Files) UploadLink(ctx context.Context,size int64,contentType string)(FileUploadLink,error){
+ key,err:=newFileKey();if err!=nil{return FileUploadLink{},err}
+ // Check the same policy before issuing a local or cloud capability.
+ // Cloud byte-level checks must happen in a post-upload validation workflow.
+ request,err:=s.uploadLinks.PresignPut(ctx,key,size,contentType,s.ttl)
+ if err!=nil{return FileUploadLink{},err}
+ s.logger.InfoContext(ctx,"file.uploadLink.issued","key",key)
+ return FileUploadLink{Key:key,Request:request},nil
+}
+func (s *Files) DownloadLink(ctx context.Context,key string)(string,error){
+ if err:=storage.Check(ctx,key);err!=nil{return "",err}
+ // Confirm the object exists without buffering its contents.
+ object,err:=s.store.Get(ctx,key);if err!=nil{return "",err}
+ if err=object.Body.Close();err!=nil{return "",err}
+ link,err:=s.downloads.PresignGet(ctx,key,s.ttl)
+ if err!=nil{return "",err}
+ s.logger.InfoContext(ctx,"file.downloadLink.issued","key",key)
+ return link.String(),nil
+}

cmd/go-omni/scaffold/templates/modules-gitignore.tmpl

@@ -0,0 +1,6 @@
+/var/
+/server
+.env
+.env.*
+*.local.yaml
+*.local.json

cmd/go-omni/scaffold/templates/modules-main.go.tmpl

@@ -0,0 +1,50 @@
+package main
+
+import (
+ "context"
+ "errors"
+ "flag"
+ "log"
+ "os"
+ "os/signal"
+ "syscall"
+
+ omni "git.yuntuo.hk/k2safe/go-omni"
+ "git.yuntuo.hk/k2safe/go-omni/logx"
+ "{{.Module}}/internal/handler"
+ "{{.Module}}/internal/service"
+ "{{.Module}}/internal/servicecontext"
+ "{{.Module}}/internal/settings"
+)
+
+func main(){
+ path:=flag.String("config","etc/config.yaml","JSON/YAML settings; empty uses defaults and environment")
+ flag.Parse()
+ if err:=run(*path);err!=nil{log.Fatal(err)}
+}
+func run(path string)(runErr error){
+ ctx,stop:=signal.NotifyContext(context.Background(),os.Interrupt,syscall.SIGTERM)
+ defer stop()
+ cfg,err:=settings.Load(path)
+ if err!=nil{return err}
+ logger,err:=logx.New(cfg.Server.Log)
+ if err!=nil{return err}
+ defer func(){runErr=errors.Join(runErr,logger.Close())}()
+ logx.SetDefault(logger)
+ services,err:=servicecontext.New(ctx,logger)
+ if err!=nil{return err}
+ defer func(){runErr=errors.Join(runErr,services.Close())}()
+ {{if ne .Storage "none"}}if err=services.InitStorage(ctx,cfg.Storage);err!=nil{return err}{{end}}
+ application:=omni.New(omni.WithConfig(cfg.Server))
+ application.OnShutdown(logger.Close)
+ application.OnShutdown(services.Close)
+ application.GET("/health/live",services.Health.LivenessHandler())
+ application.GET("/health/ready",services.Health.ReadinessHandler())
+ handler.NewUsers(service.NewUsers(services)).RegisterRoutes(application)
+ {{if ne .Storage "none"}}
+ files:=service.NewFiles(services.Files,services.Uploads,services.Downloads,services.UploadLinks,logger,cfg.Storage.LinkTTL)
+ if err=handler.NewFiles(files,cfg.Storage.MaxBytes,cfg.Storage.RequestTimeout).RegisterRoutes(application,cfg.Storage.FilesToken,services.FileHTTP);err!=nil{return err}
+ {{end}}
+ logger.InfoContext(ctx,"service.starting","address",cfg.Server.Address)
+ return application.RunContext(ctx,cfg.Server.Address)
+}

cmd/go-omni/scaffold/templates/modules-settings.go.tmpl

@@ -0,0 +1,140 @@
+// Package settings owns this project's configuration; it adds no business identity model.
+package settings
+
+import (
+ "errors"
+ "os"
+ "strings"
+ "time"
+ {{if ne .Storage "none"}}"fmt"
+ {{if ne .Storage "r2"}}"net/url"{{else}}"regexp"{{end}}
+ "strconv"
+ "git.yuntuo.hk/k2safe/go-omni/storage"{{end}}
+ {{if and .API (eq .Database "mysql")}}"git.yuntuo.hk/k2safe/go-omni/database"{{end}}
+ "git.yuntuo.hk/k2safe/go-omni/config"
+ "git.yuntuo.hk/k2safe/go-omni/logx"
+)
+
+type Config struct {
+ Server config.Config `json:"server"`
+ {{if and .API (eq .Database "mysql")}}Database database.Config `json:"database"`{{end}}
+ {{if ne .Storage "none"}}Storage StorageConfig `json:"storage"`{{end}}
+}
+
+func Default() Config {
+ server:=config.Default()
+ server.Address="127.0.0.1:8080"
+ server.EnableLogger=true
+ server.SlowRequestThreshold=500*time.Millisecond
+ server.Log.Service={{printf "%q" .Module}}
+ server.Log.Format={{printf "%q" .LogFormat}}
+ {{if eq .LogOutput "file"}}server.Log.File="./var/log/server.log"
+ server.Log.Rotation=logx.RotationConfig{Enabled:true,MaxSizeMB:100,MaxBackups:10,MaxAgeDays:7,Compress:true}
+ {{else}}server.Log.Output={{printf "%q" .LogOutput}}{{end}}
+ return Config{Server:server{{if and .API (eq .Database "mysql")}},Database:database.DefaultConfig(){{end}}{{if ne .Storage "none"}},Storage:StorageConfig{
+  Provider:{{printf "%q" .Storage}}, Root:"./var/files", PublicURL:"http://127.0.0.1:8080/storage/object",
+  Secure:true, MaxBytes:32<<20, ContentTypes:[]string{"text/plain","image/png","image/jpeg","application/pdf"},
+  LinkTTL:5*time.Minute, RequestTimeout:30*time.Second,
+  {{if eq .Storage "s3"}}Region:"us-east-1",{{end}}
+  {{if eq .Storage "r2"}}Region:"auto",{{end}}
+  {{if eq .Storage "oss"}}Region:"cn-hangzhou",{{end}}
+ }{{end}}}
+}
+
+// Load uses defaults -> strict YAML/JSON -> nonempty environment variables.
+// Pass an empty path to use only defaults and environment.
+func Load(path string)(Config,error) {
+ cfg:=Default()
+ var err error
+ if path!="" { cfg,err=config.DecodeFile(path,cfg);if err!=nil{return Config{},err} }
+ cfg.Server,err=config.ApplyEnv(cfg.Server,"")
+ if err!=nil{return Config{},err}
+ // A stream explicitly selected by environment overrides a file profile.
+ if output:=strings.TrimSpace(os.Getenv("GO_OMNI_LOG_OUTPUT"));output!="" && strings.TrimSpace(os.Getenv("GO_OMNI_LOG_FILE"))=="" {
+  cfg.Server.Log.File="";cfg.Server.Log.Rotation=logx.RotationConfig{}
+ }
+ {{if ne .Storage "none"}}
+ if err=cfg.Storage.applyEnv();err!=nil{return Config{},err}
+ {{end}}
+ {{if and .API (eq .Database "mysql")}}cfg.Database,err=database.ApplyEnv(cfg.Database,"");if err!=nil{return Config{},err}{{end}}
+ if err=cfg.Validate();err!=nil{return Config{},err}
+ return cfg,nil
+}
+func (c Config) Validate()error {
+ {{if and .API (eq .Database "mysql")}}
+ if err:=c.Database.Validate();err!=nil{return err}
+ if c.Database.Driver!="mysql" || c.Database.MaxOpenConns<1 {return errors.New("database requires driver mysql and a positive maxOpenConns")}
+ {{end}}
+ if err:=c.Server.Validate();err!=nil{return err}
+ if c.Server.Log.Format!="json" && c.Server.Log.Format!="text" {return errors.New("log.format must be json or text")}
+ switch strings.ToLower(c.Server.Log.Level) {case "debug","info","warn","warning","error":default:return errors.New("invalid log.level")}
+ {{if ne .Storage "none"}}return c.Storage.Validate(){{else}}return nil{{end}}
+}
+
+{{if ne .Storage "none"}}
+type StorageConfig struct {
+ Provider string `json:"provider"`
+ Root string `json:"root"`
+ PublicURL string `json:"publicUrl"`
+ Endpoint string `json:"endpoint"`
+ Region string `json:"region"`
+ Bucket string `json:"bucket"`
+ AccountID string `json:"accountId"`
+ Secure bool `json:"secure"`
+ MaxBytes int64 `json:"maxBytes"`
+ ContentTypes []string `json:"contentTypes"`
+ LinkTTL time.Duration `json:"linkTtl"`
+ RequestTimeout time.Duration `json:"requestTimeout"`
+ // Secrets are environment-only and cannot be populated by config files.
+ FilesToken string `json:"-"`
+ SigningKey string `json:"-"`
+ AccessKey string `json:"-"`
+ SecretKey string `json:"-"`
+ SessionToken string `json:"-"`
+}
+func (s StorageConfig) Policy()storage.UploadPolicy{return storage.UploadPolicy{MaxBytes:s.MaxBytes,ContentTypes:s.ContentTypes}}
+func (s *StorageConfig) applyEnv()error {
+ values:=map[string]*string{
+  "GO_OMNI_STORAGE_ROOT":&s.Root,"GO_OMNI_STORAGE_PUBLIC_URL":&s.PublicURL,
+  "GO_OMNI_STORAGE_ENDPOINT":&s.Endpoint,"GO_OMNI_STORAGE_REGION":&s.Region,
+  "GO_OMNI_STORAGE_BUCKET":&s.Bucket,"GO_OMNI_STORAGE_ACCOUNT_ID":&s.AccountID,
+  "GO_OMNI_STORAGE_SIGNING_KEY":&s.SigningKey,"GO_OMNI_FILES_TOKEN":&s.FilesToken,
+  "GO_OMNI_STORAGE_ACCESS_KEY":&s.AccessKey,"GO_OMNI_STORAGE_SECRET_KEY":&s.SecretKey,
+  "GO_OMNI_STORAGE_SESSION_TOKEN":&s.SessionToken,
+ }
+ for name,target:=range values {if value:=strings.TrimSpace(os.Getenv(name));value!=""{*target=value}}
+ for name,target:=range map[string]*time.Duration{"GO_OMNI_STORAGE_LINK_TTL":&s.LinkTTL,"GO_OMNI_STORAGE_REQUEST_TIMEOUT":&s.RequestTimeout} {
+  if value:=strings.TrimSpace(os.Getenv(name));value!="" {v,err:=time.ParseDuration(value);if err!=nil{return fmt.Errorf("%s must be a duration",name)};*target=v}
+ }
+ if value:=os.Getenv("GO_OMNI_STORAGE_MAX_BYTES");value!=""{v,err:=strconv.ParseInt(value,10,64);if err!=nil{return errors.New("GO_OMNI_STORAGE_MAX_BYTES must be an integer")};s.MaxBytes=v}
+ if value:=os.Getenv("GO_OMNI_STORAGE_SECURE");value!=""{v,err:=strconv.ParseBool(value);if err!=nil{return errors.New("GO_OMNI_STORAGE_SECURE must be a boolean")};s.Secure=v}
+ if value:=strings.TrimSpace(os.Getenv("GO_OMNI_STORAGE_CONTENT_TYPES"));value!="" {s.ContentTypes=strings.Split(value,",");for i:=range s.ContentTypes{s.ContentTypes[i]=strings.TrimSpace(s.ContentTypes[i])}}
+ return nil
+}
+func (s StorageConfig) Validate()error {
+ if s.Provider!={{printf "%q" .Storage}} {return errors.New("storage.provider must match the adapter selected at generation")}
+ if err:=s.Policy().Validate();err!=nil{return err}
+ if s.LinkTTL<time.Second || s.LinkTTL>time.Hour{return errors.New("storage.linkTtl must be 1s..1h")}
+ if s.RequestTimeout<=0 || s.RequestTimeout>5*time.Minute{return errors.New("storage.requestTimeout must be >0 and <=5m")}
+ {{if not .API}}if len(s.FilesToken)<32 || strings.ContainsAny(s.FilesToken," \t\r\n") {return errors.New("set GO_OMNI_FILES_TOKEN to a token of at least 32 bytes without whitespace")}{{end}}
+ {{if eq .Storage "local"}}
+ if s.Root=="" {return errors.New("storage.root is required")}
+ u,err:=url.Parse(s.PublicURL)
+ if err!=nil || u.Host=="" || u.Hostname()=="" || (u.Scheme!="http" && u.Scheme!="https") || u.User!=nil || u.RawQuery!="" || u.Fragment!="" || u.Path!="/storage/object" {return errors.New("storage.publicUrl must be an absolute HTTP(S) URL ending in /storage/object")}
+ if len(s.SigningKey)<32 {return errors.New("set GO_OMNI_STORAGE_SIGNING_KEY to a stable secret of at least 32 bytes")}
+ {{else}}
+ if s.Bucket=="" || s.Region=="" || s.AccessKey=="" || s.SecretKey=="" {return errors.New("storage bucket, region and GO_OMNI_STORAGE_ACCESS_KEY/SECRET_KEY are required")}
+ {{if eq .Storage "r2"}}
+ if !regexp.MustCompile(`^[a-fA-F0-9]{32}$`).MatchString(s.AccountID) || s.Region!="auto" || !s.Secure {return errors.New("R2 requires a 32-hex accountId, region auto and secure=true")}
+ if s.Endpoint!=""{return errors.New("this R2 profile derives endpoint from accountId; customize servicecontext for a jurisdiction-specific endpoint")}
+ {{else if eq .Storage "s3"}}
+ u,err:=url.Parse("https://"+s.Endpoint)
+ if err!=nil || s.Endpoint=="" || u.Hostname()=="" || u.User!=nil || u.Path!="" || u.RawQuery!="" || u.Fragment!="" {return errors.New("S3 endpoint must be host[:port] without scheme or path")}
+ {{else if eq .Storage "oss"}}
+ if s.Endpoint!="" {u,err:=url.Parse(s.Endpoint);if err!=nil || u.Scheme!="https" || u.Hostname()=="" || u.User!=nil || u.Path!="" || u.RawQuery!="" || u.Fragment!="" {return errors.New("OSS endpoint must be an HTTPS origin")}}
+ if !s.Secure{return errors.New("OSS requires secure=true")}
+ {{end}}
+ {{end}}
+ return nil
+}
+{{end}}

cmd/go-omni/scaffold/templates/modules-settings_test.go.tmpl

@@ -0,0 +1,38 @@
+package settings
+
+import (
+ "os"
+ "path/filepath"
+ "strings"
+ "testing"
+)
+func environment(t *testing.T){
+ t.Helper()
+ for _,entry:=range os.Environ(){key,_,_:=strings.Cut(entry,"=");if strings.HasPrefix(key,"GO_OMNI_"){t.Setenv(key,"")}}
+ {{if ne .Storage "none"}}
+ t.Setenv("GO_OMNI_FILES_TOKEN",strings.Repeat("t",32))
+ t.Setenv("GO_OMNI_STORAGE_SIGNING_KEY",strings.Repeat("s",32))
+ t.Setenv("GO_OMNI_STORAGE_ACCESS_KEY","fixtureAccess")
+ t.Setenv("GO_OMNI_STORAGE_SECRET_KEY","fixtureSecret")
+ t.Setenv("GO_OMNI_STORAGE_BUCKET","testbucket")
+ {{if eq .Storage "s3"}}t.Setenv("GO_OMNI_STORAGE_ENDPOINT","127.0.0.1:9000"){{end}}
+ {{if eq .Storage "r2"}}t.Setenv("GO_OMNI_STORAGE_ACCOUNT_ID",strings.Repeat("a",32)){{end}}
+ {{end}}
+}
+func TestSettingsPrecedenceAndStrictness(t *testing.T){
+ environment(t)
+ path:=filepath.Join(t.TempDir(),"config.yaml")
+ if err:=os.WriteFile(path,[]byte("server:\n  address: '127.0.0.1:8123'\n  log:\n    level: debug\n"),0600);err!=nil{t.Fatal(err)}
+ t.Setenv("GO_OMNI_HTTP_ADDR","127.0.0.1:9123")
+ t.Setenv("GO_OMNI_LOG_OUTPUT","stdout")
+ cfg,err:=Load(path);if err!=nil{t.Fatal(err)}
+ if cfg.Server.Address!="127.0.0.1:9123" || cfg.Server.Log.Level!="debug" || cfg.Server.Log.Output!="stdout" || cfg.Server.Log.File!="" || cfg.Server.Log.Rotation.Enabled {t.Fatal("configuration precedence failed")}
+ for _,body:=range []string{"unexpected: true","server:\n  slowRequestThreshold: -1s","server:\n  log:\n    format: invalid"{{if ne .Storage "none"}},"storage:\n  filesToken: forbidden","storage:\n  maxBytes: -1","storage:\n  provider: unsupported"{{end}}}{
+  if err:=os.WriteFile(path,[]byte(body),0600);err!=nil{t.Fatal(err)}
+  if _,err:=Load(path);err==nil{t.Fatal("invalid configuration accepted")}
+ }
+ {{if ne .Storage "none"}}
+ t.Setenv("GO_OMNI_FILES_TOKEN","")
+ if _,err:=Load("");err==nil{t.Fatal("missing file token accepted")}
+ {{end}}
+}

cmd/go-omni/scaffold/templates/modules-storage.go.tmpl

@@ -0,0 +1,79 @@
+package servicecontext
+
+import (
+ "context"
+ "errors"
+ {{if eq .Storage "local"}}
+ "git.yuntuo.hk/k2safe/go-omni/storage/local"
+ {{else}}
+ "net"
+ "net/http"
+ "time"
+ {{if eq .Storage "oss"}}
+ ossStore "git.yuntuo.hk/k2safe/go-omni/storage/oss"
+ ossSDK "github.com/aliyun/alibabacloud-oss-go-sdk-v2/oss"
+ "github.com/aliyun/alibabacloud-oss-go-sdk-v2/oss/credentials"
+ {{else}}
+ "git.yuntuo.hk/k2safe/go-omni/storage/s3"
+ "github.com/minio/minio-go/v7/pkg/credentials"
+ {{end}}{{end}}
+ "git.yuntuo.hk/k2safe/go-omni/storage"
+ "{{.Module}}/internal/settings"
+)
+
+// InitStorage is called once, before serving requests. The composition root
+// owns provider clients; business services receive only capability interfaces.
+func (c *Context) InitStorage(ctx context.Context,cfg settings.StorageConfig)error {
+ if c==nil || ctx==nil{return errors.New("storage initialization requires context")}
+ c.closeMu.Lock();defer c.closeMu.Unlock()
+ if c.closed{return errors.New("service dependencies are closed")}
+ if err:=ctx.Err();err!=nil{return err}
+ if c.Files!=nil{return errors.New("storage already initialized")}
+ if err:=cfg.Validate();err!=nil{return err}
+ {{if eq .Storage "local"}}
+ files,err:=local.New(cfg.Root,cfg.MaxBytes)
+ if err!=nil{return err}
+ signer,err:=storage.NewUploadSigner(files,cfg.PublicURL,[]byte(cfg.SigningKey),cfg.Policy())
+ if err!=nil{return err}
+ uploader,err:=storage.NewUploader(files,cfg.Policy())
+ if err!=nil{return err}
+ c.Files,c.Uploads,c.Downloads,c.UploadLinks,c.FileHTTP=files,uploader,signer,signer,signer
+ {{else}}
+ // Dedicated bounded pool, never the process-wide default transport.
+ transport:=&http.Transport{
+  Proxy:http.ProxyFromEnvironment,
+  DialContext:(&net.Dialer{Timeout:5*time.Second,KeepAlive:30*time.Second}).DialContext,
+  ForceAttemptHTTP2:true, MaxIdleConns:32,MaxIdleConnsPerHost:8,MaxConnsPerHost:32,
+  IdleConnTimeout:90*time.Second,TLSHandshakeTimeout:5*time.Second,
+  ResponseHeaderTimeout:cfg.RequestTimeout,
+ }
+ initialized:=false
+ defer func(){if !initialized{transport.CloseIdleConnections()}}()
+ {{if eq .Storage "oss"}}
+ sdkConfig:=ossSDK.LoadDefaultConfig().WithRegion(cfg.Region).
+  WithSignatureVersion(ossSDK.SignatureVersionV4).
+  WithAdditionalHeaders([]string{"content-length"}).
+  WithCredentialsProvider(credentials.NewStaticCredentialsProvider(cfg.AccessKey,cfg.SecretKey,cfg.SessionToken)).
+  WithHttpClient(&http.Client{Transport:transport,Timeout:cfg.RequestTimeout})
+ if cfg.Endpoint!=""{sdkConfig.WithEndpoint(cfg.Endpoint)}
+ files,err:=ossStore.New(ossSDK.NewClient(sdkConfig),cfg.Bucket,cfg.MaxBytes)
+ {{else}}
+ creds:=credentials.NewStaticV4(cfg.AccessKey,cfg.SecretKey,cfg.SessionToken)
+ {{if eq .Storage "r2"}}
+ options,err:=s3.R2Config(cfg.AccountID,cfg.Bucket,creds)
+ if err!=nil{return err}
+ options.MaxBytes,options.Transport=cfg.MaxBytes,transport
+ {{else}}
+ options:=s3.Config{Endpoint:cfg.Endpoint,Region:cfg.Region,Bucket:cfg.Bucket,Secure:cfg.Secure,MaxBytes:cfg.MaxBytes,Credentials:creds,Transport:transport}
+ {{end}}
+ files,err:=s3.Open(options)
+ {{end}}
+ if err!=nil{return err}
+ uploader,err:=storage.NewUploader(files,cfg.Policy())
+ if err!=nil{return err}
+ c.Files,c.Uploads,c.Downloads,c.UploadLinks=files,uploader,files,uploader
+ c.storageClose=func()error{transport.CloseIdleConnections();return nil}
+ initialized=true
+ {{end}}
+ return nil
+}

cmd/go-omni/scaffold/templates/modules-storage_test.go.tmpl

@@ -0,0 +1,38 @@
+package servicecontext
+
+import (
+ "bytes"
+ "context"
+ "strings"
+ "testing"
+
+ "git.yuntuo.hk/k2safe/go-omni/logx"
+ "{{.Module}}/internal/settings"
+)
+func TestStorageInitializationAndOwnership(t *testing.T){
+ cfg:=settings.Default().Storage
+ cfg.FilesToken=strings.Repeat("t",32)
+ cfg.SigningKey=strings.Repeat("s",32)
+ cfg.Root=t.TempDir()
+ cfg.AccessKey,cfg.SecretKey,cfg.Bucket="fixtureAccess","fixtureSecret","testbucket"
+ {{if eq .Storage "s3"}}cfg.Endpoint="127.0.0.1:9000"{{end}}
+ {{if eq .Storage "r2"}}cfg.AccountID=strings.Repeat("a",32){{end}}
+ var output bytes.Buffer
+ logger,err:=logx.New(logx.Config{Writer:&output});if err!=nil{t.Fatal(err)};defer logger.Close()
+ c:=&Context{Logger:logger}
+ canceled,cancel:=context.WithCancel(context.Background());cancel()
+ if err=c.InitStorage(canceled,cfg);err==nil || c.Files!=nil{t.Fatal("canceled startup initialized storage")}
+ invalid:=cfg;invalid.FilesToken=""
+ if err=c.InitStorage(context.Background(),invalid);err==nil || c.Files!=nil{t.Fatal("invalid settings initialized storage")}
+ if err=c.InitStorage(context.Background(),cfg);err!=nil{t.Fatal(err)}
+ if c.Files==nil || c.Uploads==nil || c.Downloads==nil || c.UploadLinks==nil{t.Fatal("dependencies not assembled")}
+ if err=c.InitStorage(context.Background(),cfg);err==nil{t.Fatal("duplicate initialization accepted")}
+ cleanup:=c.storageClose;count:=0
+ c.storageClose=func()error{count++;if cleanup!=nil{return cleanup()};return nil}
+ if err=c.Close();err!=nil{t.Fatal(err)};if err=c.Close();err!=nil{t.Fatal(err)}
+ logger.Info("still usable")
+ if count!=1 || !strings.Contains(output.String(),"still usable"){t.Fatal("resource ownership violated")}
+ closed:=&Context{Logger:logger}
+ if err=closed.Close();err!=nil{t.Fatal(err)}
+ if err=closed.InitStorage(context.Background(),cfg);err==nil || closed.Files!=nil{t.Fatal("closed context reopened resources")}
+}

cmd/go-omni/scaffold/version.go

@@ -10,7 +10,19 @@ const frameworkModule = "git.yuntuo.hk/k2safe/go-omni"
 // Source builds can carry an unpublished VCS version (including +dirty).
 // Keep this fallback in sync with the next release; installed CLIs use their
 // downloaded module version, which also has a module checksum.
-const defaultFrameworkVersion = "v0.6.0-preview"
+const defaultFrameworkVersion = "v0.9.1-preview"
+
+// This target is not a claim that the release already exists. Source users
+// select a local framework checkout until the module templates are published.
+const modulesFrameworkVersion = "v0.7.0-preview"
+
+func installedFrameworkVersion() string {
+	info, _ := debug.ReadBuildInfo()
+	if info != nil && info.Main.Path == frameworkModule && info.Main.Sum != "" && validFrameworkVersion(info.Main.Version) {
+		return info.Main.Version
+	}
+	return ""
+}
 
 var frameworkVersionPattern = regexp.MustCompile(`^v[01]\.(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)(-((0|[1-9][0-9]*|[0-9]*[A-Za-z-][0-9A-Za-z-]*)(\.(0|[1-9][0-9]*|[0-9]*[A-Za-z-][0-9A-Za-z-]*))*))?(\+[0-9A-Za-z-]+(\.[0-9A-Za-z-]+)*)?$`)
 

config/config.go

@@ -6,6 +6,7 @@ import (
 
 	"git.yuntuo.hk/k2safe/go-omni/httpx"
 	"git.yuntuo.hk/k2safe/go-omni/logx"
+	"git.yuntuo.hk/k2safe/go-omni/response"
 )
 
 const defaultRequestIDHeader = "X-Request-ID"
@@ -24,14 +25,18 @@ type TLSConfig struct {
 
 // Config controls the default runtime behavior of an App.
 type Config struct {
-	Address         string        `json:"address"`
-	Transport       string        `json:"transport"`
-	TLS             TLSConfig     `json:"tls"`
-	RequestIDHeader string        `json:"requestIdHeader"`
-	EnableLogger    bool          `json:"enableLogger"`
-	TrustedProxies  []string      `json:"trustedProxies"`
-	ShutdownTimeout time.Duration `json:"shutdownTimeout"`
-	Log             logx.Config   `json:"log"`
+	Address              string           `json:"address"`
+	Transport            string           `json:"transport"`
+	TLS                  TLSConfig        `json:"tls"`
+	HTTP                 HTTPConfig       `json:"http"`
+	RequestIDHeader      string           `json:"requestIdHeader"`
+	EnableLogger         bool             `json:"enableLogger"`
+	SlowRequestThreshold time.Duration    `json:"slowRequestThreshold"`
+	TrustedProxies       []string         `json:"trustedProxies"`
+	ShutdownTimeout      time.Duration    `json:"shutdownTimeout"`
+	Log                  logx.Config      `json:"log"`
+	Response             response.Config  `json:"response"`
+	ResponseEncoder      response.Encoder `json:"-"`
 }
 
 func Default() Config {
@@ -46,6 +51,12 @@ func Default() Config {
 
 // Validate checks configuration values before an application starts.
 func (c Config) Validate() error {
+	if err := c.Response.Validate(); err != nil {
+		return err
+	}
+	if c.SlowRequestThreshold < 0 {
+		return &ConfigError{Field: "slowRequestThreshold", Message: "must be nonnegative"}
+	}
 	if strings.TrimSpace(c.Address) == "" {
 		return &ConfigError{Field: "address", Message: "is required"}
 	}
@@ -64,11 +75,20 @@ func (c Config) Validate() error {
 // ValidateTransport checks built-in transport selection without opening files
 // or sockets. Empty Transport preserves the standard net/http default.
 func (c Config) ValidateTransport() error {
+	if err := c.HTTP.Validate(); err != nil {
+		return err
+	}
 	switch c.Transport {
 	case "", TransportNetHTTP, TransportNative, TransportHTTP2:
 	default:
 		return &ConfigError{Field: "transport", Message: "must be nethttp, native or http2"}
 	}
+	if c.Transport == TransportHTTP2 && (c.HTTP.ReadHeaderTimeout > 0 || c.HTTP.ReadTimeout > 0 || c.HTTP.WriteTimeout > 0) {
+		return &ConfigError{Field: "http", Message: "readHeaderTimeout, readTimeout and writeTimeout are not supported by the experimental http2 transport"}
+	}
+	if c.HTTP.ErrorLog != nil && c.Transport != "" && c.Transport != TransportNetHTTP {
+		return &ConfigError{Field: "http.errorLog", Message: "is supported only by the nethttp transport"}
+	}
 	cert, key := strings.TrimSpace(c.TLS.CertFile), strings.TrimSpace(c.TLS.KeyFile)
 	if (cert == "") != (key == "") {
 		return &ConfigError{Field: "tls", Message: "requires both certFile and keyFile"}
@@ -114,6 +134,11 @@ func WithLogger(enabled bool) Option {
 	return func(cfg *Config) { cfg.EnableLogger = enabled }
 }
 
+// WithSlowRequestThreshold enables access logs and warns after this duration.
+func WithSlowRequestThreshold(threshold time.Duration) Option {
+	return func(cfg *Config) { cfg.SlowRequestThreshold = threshold; cfg.EnableLogger = true }
+}
+
 // WithTrustedProxies allows only these IPs/CIDRs to supply X-Forwarded-For.
 // An empty list disables forwarding-header trust. Invalid entries are rejected
 // by Config.Validate and panic when passed directly to App.New.
@@ -125,16 +150,36 @@ func WithTrustedProxies(proxies ...string) Option {
 // WithConfig applies a complete configuration loaded from a file or
 // environment. Later options can still override individual fields.
 func WithConfig(settings Config) Option {
+	settings.Response = settings.Response.Clone()
 	settings.TrustedProxies = append([]string(nil), settings.TrustedProxies...)
+	settings.Log.RedactKeys = append([]string(nil), settings.Log.RedactKeys...)
 	return func(cfg *Config) {
 		*cfg = settings
+		cfg.Response = settings.Response.Clone()
 		cfg.TrustedProxies = append([]string(nil), settings.TrustedProxies...)
+		cfg.Log.RedactKeys = append([]string(nil), settings.Log.RedactKeys...)
 	}
 }
 
+// WithResponse configures this application's default JSON envelope.
+func WithResponse(settings response.Config) Option {
+	settings = settings.Clone()
+	return func(cfg *Config) { cfg.Response = settings.Clone(); cfg.ResponseEncoder = nil }
+}
+
+// WithResponseEncoder replaces the default encoder with application code.
+// OpenAPI for custom encoders must describe their actual wire contract explicitly.
+func WithResponseEncoder(encoder response.Encoder) Option {
+	return func(cfg *Config) { cfg.ResponseEncoder = encoder }
+}
+
 // WithLogConfig configures the logger used by the application runtime.
 func WithLogConfig(settings logx.Config) Option {
-	return func(cfg *Config) { cfg.Log = settings }
+	settings.RedactKeys = append([]string(nil), settings.RedactKeys...)
+	return func(cfg *Config) {
+		cfg.Log = settings
+		cfg.Log.RedactKeys = append([]string(nil), settings.RedactKeys...)
+	}
 }
 
 // WithShutdownTimeout controls how long RunContext waits for active requests.

config/config_test.go

@@ -14,6 +14,7 @@ func TestLoadFromEnvUsesDefaults(t *testing.T) {
 		"GO_OMNI_LOG_LEVEL", "GO_OMNI_LOG_FORMAT", "GO_OMNI_LOG_OUTPUT",
 		"GO_OMNI_LOG_FILE", "GO_OMNI_SERVICE", "GO_OMNI_ENVIRONMENT",
 		"GO_OMNI_LOG_ADD_SOURCE", "GO_OMNI_SHUTDOWN_TIMEOUT",
+		"GO_OMNI_SLOW_REQUEST_THRESHOLD",
 	} {
 		t.Setenv(key, "")
 	}
@@ -80,6 +81,7 @@ func TestLoadFromEnvOverridesSettings(t *testing.T) {
 	t.Setenv("GO_OMNI_ENVIRONMENT", "test")
 	t.Setenv("GO_OMNI_LOG_ADD_SOURCE", "true")
 	t.Setenv("GO_OMNI_SHUTDOWN_TIMEOUT", "3s")
+	t.Setenv("GO_OMNI_SLOW_REQUEST_THRESHOLD", "500ms")
 
 	cfg, err := LoadFromEnv("")
 	if err != nil {
@@ -91,6 +93,9 @@ func TestLoadFromEnvOverridesSettings(t *testing.T) {
 	if cfg.ShutdownTimeout != 3*time.Second || cfg.Log.Level != "debug" || cfg.Log.Format != "text" || cfg.Log.Output != "stdout" || cfg.Log.Service != "billing" || cfg.Log.Environment != "test" || !cfg.Log.AddSource {
 		t.Fatalf("unexpected logger settings: %+v", cfg.Log)
 	}
+	if cfg.SlowRequestThreshold != 500*time.Millisecond {
+		t.Fatal(cfg.SlowRequestThreshold)
+	}
 }
 
 func TestLoadFromEnvRejectsInvalidValues(t *testing.T) {
@@ -142,3 +147,23 @@ func TestWithConfigAndWithLogConfig(t *testing.T) {
 		t.Fatalf("log config was not replaced: %+v", cfg.Log)
 	}
 }
+
+func TestApplyEnvPreservesProjectDefaults(t *testing.T) {
+	cfg := Default()
+	cfg.Address = "127.0.0.1:8123"
+	cfg.Log.RedactKeys = []string{"bankAccount"}
+	cfg.TrustedProxies = []string{"127.0.0.1"}
+	t.Setenv("OVERLAY_TEST_LOG_LEVEL", "debug")
+	got, err := ApplyEnv(cfg, "OVERLAY_TEST_")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if got.Address != cfg.Address || got.Log.Level != "debug" {
+		t.Fatal(got)
+	}
+	got.Log.RedactKeys[0] = "changed"
+	got.TrustedProxies[0] = "192.0.2.1"
+	if cfg.Log.RedactKeys[0] != "bankAccount" || cfg.TrustedProxies[0] != "127.0.0.1" {
+		t.Fatal("caller-owned defaults mutated")
+	}
+}

config/env.go

@@ -16,6 +16,14 @@ func LoadFromEnv(prefix string) (Config, error) {
 	return applyEnv(Default(), prefix)
 }
 
+// ApplyEnv overlays nonempty environment values on a caller's defaults or file
+// settings, then validates the result. Caller-owned slices are not retained.
+func ApplyEnv(defaults Config, prefix string) (Config, error) {
+	defaults.TrustedProxies = append([]string(nil), defaults.TrustedProxies...)
+	defaults.Log.RedactKeys = append([]string(nil), defaults.Log.RedactKeys...)
+	return applyEnv(defaults, prefix)
+}
+
 func applyEnv(cfg Config, prefix string) (Config, error) {
 	prefix = strings.TrimSpace(prefix)
 	if prefix == "" {
@@ -40,12 +48,40 @@ func applyEnv(cfg Config, prefix string) (Config, error) {
 	cfg.Log.Environment = envString(prefix+"ENVIRONMENT", cfg.Log.Environment)
 
 	var err error
+	for _, field := range []struct {
+		name  string
+		value *time.Duration
+	}{
+		{"HTTP_READ_HEADER_TIMEOUT", &cfg.HTTP.ReadHeaderTimeout},
+		{"HTTP_READ_TIMEOUT", &cfg.HTTP.ReadTimeout},
+		{"HTTP_WRITE_TIMEOUT", &cfg.HTTP.WriteTimeout},
+		{"HTTP_IDLE_TIMEOUT", &cfg.HTTP.IdleTimeout},
+	} {
+		if value := strings.TrimSpace(os.Getenv(prefix + field.name)); value != "" {
+			*field.value, err = time.ParseDuration(value)
+			if err != nil {
+				return Config{}, fmt.Errorf("%s%s must be a duration: %w", prefix, field.name, err)
+			}
+		}
+	}
+	if value := strings.TrimSpace(os.Getenv(prefix + "HTTP_MAX_HEADER_BYTES")); value != "" {
+		cfg.HTTP.MaxHeaderBytes, err = strconv.Atoi(value)
+		if err != nil {
+			return Config{}, fmt.Errorf("%sHTTP_MAX_HEADER_BYTES must be an integer: %w", prefix, err)
+		}
+	}
 	if cfg.EnableLogger, err = envBool(prefix+"ENABLE_LOGGER", cfg.EnableLogger); err != nil {
 		return Config{}, err
 	}
 	if cfg.Log.AddSource, err = envBool(prefix+"LOG_ADD_SOURCE", cfg.Log.AddSource); err != nil {
 		return Config{}, err
 	}
+	if value := strings.TrimSpace(os.Getenv(prefix + "SLOW_REQUEST_THRESHOLD")); value != "" {
+		cfg.SlowRequestThreshold, err = time.ParseDuration(value)
+		if err != nil {
+			return Config{}, fmt.Errorf("%sSLOW_REQUEST_THRESHOLD must be a duration: %w", prefix, err)
+		}
+	}
 	if value := strings.TrimSpace(os.Getenv(prefix + "SHUTDOWN_TIMEOUT")); value != "" {
 		cfg.ShutdownTimeout, err = time.ParseDuration(value)
 		if err != nil {

config/file.go

@@ -181,7 +181,9 @@ func (r *Reloader) Snapshot() Config {
 	r.mu.Lock()
 	defer r.mu.Unlock()
 	cfg := r.current
+	cfg.Response = r.current.Response.Clone()
 	cfg.TrustedProxies = append([]string(nil), cfg.TrustedProxies...)
+	cfg.Log.RedactKeys = append([]string(nil), cfg.Log.RedactKeys...)
 	return cfg
 }
 func (r *Reloader) Watch(ctx context.Context, interval time.Duration, onError func(error)) error {

config/http.go

@@ -0,0 +1,45 @@
+package config
+
+import (
+	"log"
+	"time"
+)
+
+// HTTPConfig controls built-in HTTP servers. Positive values override the
+// selected transport's defaults; zero keeps its existing behavior. Timeouts
+// follow that transport's semantics, not a handler execution deadline.
+type HTTPConfig struct {
+	ReadHeaderTimeout time.Duration `json:"readHeaderTimeout"`
+	ReadTimeout       time.Duration `json:"readTimeout"`
+	WriteTimeout      time.Duration `json:"writeTimeout"`
+	IdleTimeout       time.Duration `json:"idleTimeout"`
+	MaxHeaderBytes    int           `json:"maxHeaderBytes"`
+	// ErrorLog is a Go-only hook for the nethttp server's internal diagnostics.
+	ErrorLog *log.Logger `json:"-"`
+}
+
+func (c HTTPConfig) Validate() error {
+	for _, field := range []struct {
+		name  string
+		value time.Duration
+	}{
+		{"readHeaderTimeout", c.ReadHeaderTimeout},
+		{"readTimeout", c.ReadTimeout},
+		{"writeTimeout", c.WriteTimeout},
+		{"idleTimeout", c.IdleTimeout},
+	} {
+		if field.value < 0 {
+			return &ConfigError{Field: "http." + field.name, Message: "must be nonnegative"}
+		}
+	}
+	if c.MaxHeaderBytes < 0 {
+		return &ConfigError{Field: "http.maxHeaderBytes", Message: "must be nonnegative"}
+	}
+	return nil
+}
+
+// WithHTTPConfig sets the built-in server's HTTP options. RunWith uses a
+// caller-owned Runner and does not apply these options to that runner.
+func WithHTTPConfig(settings HTTPConfig) Option {
+	return func(cfg *Config) { cfg.HTTP = settings }
+}

config/http_test.go

@@ -0,0 +1,87 @@
+package config_test
+
+import (
+	"io"
+	"log"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+	"time"
+
+	"git.yuntuo.hk/k2safe/go-omni/config"
+)
+
+func TestHTTPFileAndEnvironment(t *testing.T) {
+	for _, file := range []struct{ name, body string }{
+		{"server.json", `{"http":{"readHeaderTimeout":"2s","readTimeout":"3s","writeTimeout":"4s","idleTimeout":"5s","maxHeaderBytes":8192}}`},
+		{"server.yaml", "http:\n  readHeaderTimeout: 2s\n  readTimeout: 3s\n  writeTimeout: 4s\n  idleTimeout: 5s\n  maxHeaderBytes: 8192\n"},
+	} {
+		t.Run(file.name, func(t *testing.T) {
+			path := filepath.Join(t.TempDir(), file.name)
+			if err := os.WriteFile(path, []byte(file.body), 0600); err != nil {
+				t.Fatal(err)
+			}
+			cfg, err := config.LoadFile(path, "HTTP_TEST_")
+			if err != nil {
+				t.Fatal(err)
+			}
+			want := config.HTTPConfig{ReadHeaderTimeout: 2 * time.Second, ReadTimeout: 3 * time.Second, WriteTimeout: 4 * time.Second, IdleTimeout: 5 * time.Second, MaxHeaderBytes: 8192}
+			if cfg.HTTP != want {
+				t.Fatalf("HTTP: %+v", cfg.HTTP)
+			}
+			t.Setenv("HTTP_TEST_HTTP_READ_HEADER_TIMEOUT", "6s")
+			t.Setenv("HTTP_TEST_HTTP_READ_TIMEOUT", "7s")
+			t.Setenv("HTTP_TEST_HTTP_WRITE_TIMEOUT", "8s")
+			t.Setenv("HTTP_TEST_HTTP_IDLE_TIMEOUT", "9s")
+			t.Setenv("HTTP_TEST_HTTP_MAX_HEADER_BYTES", "16384")
+			got, err := config.ApplyEnv(cfg, "HTTP_TEST_")
+			if err != nil {
+				t.Fatal(err)
+			}
+			want = config.HTTPConfig{ReadHeaderTimeout: 6 * time.Second, ReadTimeout: 7 * time.Second, WriteTimeout: 8 * time.Second, IdleTimeout: 9 * time.Second, MaxHeaderBytes: 16384}
+			if got.HTTP != want {
+				t.Fatalf("overlay: %+v", got.HTTP)
+			}
+		})
+	}
+}
+
+func TestHTTPInvalidAndUnsupportedSettings(t *testing.T) {
+	for _, key := range []string{"READ_HEADER_TIMEOUT", "READ_TIMEOUT", "WRITE_TIMEOUT", "IDLE_TIMEOUT", "MAX_HEADER_BYTES"} {
+		for _, value := range []string{"invalid", "-1"} {
+			t.Run(key+value, func(t *testing.T) {
+				if value == "-1" && key != "MAX_HEADER_BYTES" {
+					value = "-1s"
+				}
+				t.Setenv("HTTP_INVALID_HTTP_"+key, value)
+				if _, err := config.LoadFromEnv("HTTP_INVALID_"); err == nil {
+					t.Fatal("invalid HTTP value accepted")
+				}
+			})
+		}
+	}
+	for _, http := range []config.HTTPConfig{{ReadHeaderTimeout: time.Second}, {ReadTimeout: time.Second}, {WriteTimeout: time.Second}} {
+		cfg := config.Default()
+		cfg.Transport = config.TransportHTTP2
+		cfg.TLS = config.TLSConfig{CertFile: "c", KeyFile: "k"}
+		cfg.HTTP = http
+		if err := cfg.ValidateTransport(); err == nil || !strings.Contains(err.Error(), "not supported") {
+			t.Fatalf("HTTP/2: %v", err)
+		}
+	}
+	cfg := config.Default()
+	cfg.Transport = config.TransportHTTP2
+	cfg.TLS = config.TLSConfig{CertFile: "c", KeyFile: "k"}
+	cfg.HTTP = config.HTTPConfig{IdleTimeout: time.Minute, MaxHeaderBytes: 8192}
+	if err := cfg.ValidateTransport(); err != nil {
+		t.Fatal(err)
+	}
+	for _, transport := range []string{config.TransportNative, config.TransportHTTP2} {
+		cfg.Transport = transport
+		cfg.HTTP = config.HTTPConfig{ErrorLog: log.New(io.Discard, "", 0)}
+		if err := cfg.ValidateTransport(); err == nil || !strings.Contains(err.Error(), "http.errorLog") {
+			t.Fatalf("ErrorLog silently ignored: %v", err)
+		}
+	}
+}

contract/README.md

@@ -0,0 +1,30 @@
+# contract
+
+Generated API projects use this package to compile Go field tags once and bind
+each request without depending on a specific HTTP server. `New[T]` validates a
+struct and returns an immutable Binder. `ForType` provides the same compiler to
+the CLI. `BodySchema`, `Parameters`, and `ResponseSchema` return detached OpenAPI
+snapshots. `MustNew[T]` is intended for generated, already checked declarations.
+
+```go
+type Request struct {
+    ID int64 `path:"id,range=[1:100]"`
+    Name string `json:"name" binding:"required,max=50"`
+}
+
+var request = contract.MustNew[Request]()
+
+func Handle(c *httpx.Context) error {
+    var req Request
+    if err := request.Bind(c.Request(), httpx.RouteParams(c.Context()), &req); err != nil {
+        return err
+    }
+    return c.OK(req.Name)
+}
+```
+
+The default body limit is 1 MiB. An optional positive final argument to Bind
+overrides it. Application transport read timeouts still control slow clients.
+See [API.md](../API.md) for source tags, validation rules, null/presence behavior,
+strict decoding and supported type limits. This API leaves the existing
+`Context.BindJSON/BindQuery/BindURI` behavior unchanged.

contract/bind.go

@@ -0,0 +1,331 @@
+package contract
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"math"
+	"mime"
+	"net/http"
+	"net/url"
+	"reflect"
+	"strconv"
+
+	apierrors "git.yuntuo.hk/k2safe/go-omni/errors"
+)
+
+// Bind fills a fresh DTO transactionally. A JSON body, if declared, is required,
+// strictly decoded, and limited to 1 MiB unless maxBytes is supplied. Query
+// parameters never overwrite path/body/header values. form means URL query only.
+func (b *Binder) Bind(r *http.Request, params map[string]string, target any, maxBytes ...int64) error {
+	if b == nil || r == nil || b.schemaOnly {
+		return apierrors.Internal(errors.New("contract: nil binder or request"))
+	}
+	v := reflect.ValueOf(target)
+	if v.Kind() != reflect.Pointer || v.IsNil() || v.Elem().Type() != b.typ {
+		return apierrors.Internal(errors.New("contract: target type mismatch"))
+	}
+	limit := DefaultMaxBodyBytes
+	if len(maxBytes) > 1 || (len(maxBytes) == 1 && (maxBytes[0] <= 0 || maxBytes[0] == math.MaxInt64)) {
+		return apierrors.Internal(errors.New("contract: invalid body limit"))
+	}
+	if len(maxBytes) == 1 {
+		limit = maxBytes[0]
+	}
+	fresh := reflect.New(b.typ).Elem()
+	body := map[string]any{}
+	if len(b.root.schema.Properties) > 0 {
+		ct, _, err := mime.ParseMediaType(r.Header.Get("Content-Type"))
+		if err != nil || ct != "application/json" {
+			return apierrors.New(415, "UNSUPPORTED_MEDIA_TYPE", "Content-Type must be application/json")
+		}
+		if r.Body == nil {
+			return invalid(errors.New("body required"))
+		}
+		if r.ContentLength > limit {
+			return tooLarge()
+		}
+		reader := &io.LimitedReader{R: r.Body, N: limit + 1}
+		dec := json.NewDecoder(reader)
+		dec.UseNumber()
+		value, err := decodeValue(dec, 0)
+		if reader.N == 0 {
+			return tooLarge()
+		}
+		if err != nil {
+			var maxErr *http.MaxBytesError
+			if errors.As(err, &maxErr) {
+				return tooLarge()
+			}
+			return invalid(err)
+		}
+		_, err = dec.Token()
+		if reader.N == 0 {
+			return tooLarge()
+		}
+		if err != io.EOF {
+			var maxErr *http.MaxBytesError
+			if errors.As(err, &maxErr) {
+				return tooLarge()
+			}
+			return invalid(errors.New("exactly one JSON value required"))
+		}
+		var ok bool
+		body, ok = value.(map[string]any)
+		if !ok {
+			return invalid(errors.New("body must be an object"))
+		}
+		for key := range body {
+			if _, ok = b.root.schema.Properties[key]; !ok {
+				return invalid(fmt.Errorf("unknown body field %s", key))
+			}
+		}
+	}
+	query := url.Values{}
+	if r.URL != nil {
+		var err error
+		query, err = url.ParseQuery(r.URL.RawQuery)
+		if err != nil {
+			return invalid(errors.New("malformed query"))
+		}
+	}
+	for _, f := range b.root.fields {
+		var value any
+		var present bool
+		if f.source == "json" {
+			value, present = body[f.name]
+		} else {
+			var raw []string
+			switch f.source {
+			case "path":
+				if s, ok := params[f.name]; ok {
+					raw = []string{s}
+				}
+			case "form":
+				raw = query[f.name]
+			case "header":
+				raw = r.Header.Values(f.name)
+			}
+			present = len(raw) > 0
+			if present {
+				var err error
+				value, err = fromStrings(f.value, raw)
+				if err != nil {
+					return invalid(fmt.Errorf("%s: %w", f.name, err))
+				}
+			}
+		}
+		if err := assignField(f, fresh.Field(f.index), value, present); err != nil {
+			return invalid(fmt.Errorf("%s: %w", f.name, err))
+		}
+	}
+	v.Elem().Set(fresh)
+	return nil
+}
+func invalid(err error) error {
+	return apierrors.BadRequest("INVALID_REQUEST", "request parameters are invalid").WithCause(err)
+}
+func tooLarge() error { return apierrors.New(413, "BODY_TOO_LARGE", "request body exceeds limit") }
+
+func fromStrings(n *node, values []string) (any, error) {
+	n = base(n)
+	if n.scalar != nil {
+		if len(values) != 1 {
+			return nil, errors.New("duplicate scalar parameter")
+		}
+		return scalarText(values[0]), nil
+	}
+	if n.typ.Kind() == reflect.Slice {
+		out := make([]any, 0, len(values))
+		for _, s := range values {
+			v, err := fromStrings(n.elem, []string{s})
+			if err != nil {
+				return nil, err
+			}
+			out = append(out, v)
+		}
+		return out, nil
+	}
+	if len(values) != 1 {
+		return nil, errors.New("duplicate scalar parameter")
+	}
+	return parseScalar(values[0], n.typ)
+}
+func assignField(f field, dst reflect.Value, value any, present bool) error {
+	if !present {
+		if f.hasDefault {
+			value = f.fallback
+		} else if f.optional {
+			return nil
+		} else {
+			return errors.New("required field missing")
+		}
+	}
+	if err := setValue(f.value, dst, value); err != nil {
+		return err
+	}
+	return checkField(f, dst)
+}
+func setValue(n *node, dst reflect.Value, value any) error {
+	if n.scalar != nil {
+		return n.scalar.decode(dst, value)
+	}
+	if n.typ.Kind() == reflect.Interface && n.typ.NumMethod() == 0 {
+		if value == nil {
+			dst.SetZero()
+		} else {
+			dst.Set(reflect.ValueOf(value))
+		}
+		return nil
+	}
+	if value == nil {
+		if n.typ.Kind() == reflect.Pointer {
+			dst.SetZero()
+			return nil
+		}
+		return errors.New("null requires a pointer type")
+	}
+	if n.typ.Kind() == reflect.Pointer {
+		dst.Set(reflect.New(n.typ.Elem()))
+		return setValue(n.elem, dst.Elem(), value)
+	}
+	switch n.typ.Kind() {
+	case reflect.Struct:
+		object, ok := value.(map[string]any)
+		if !ok {
+			return errors.New("expected object")
+		}
+		for key := range object {
+			if _, ok = n.schema.Properties[key]; !ok {
+				return fmt.Errorf("unknown field %s", key)
+			}
+		}
+		for _, f := range n.fields {
+			item, exists := object[f.name]
+			if err := assignField(f, dst.Field(f.index), item, exists); err != nil {
+				return fmt.Errorf("%s: %w", f.name, err)
+			}
+		}
+	case reflect.Slice:
+		items, ok := value.([]any)
+		if !ok {
+			return errors.New("expected array")
+		}
+		dst.Set(reflect.MakeSlice(n.typ, len(items), len(items)))
+		for i, item := range items {
+			if err := setValue(n.elem, dst.Index(i), item); err != nil {
+				return fmt.Errorf("item %d: %w", i, err)
+			}
+		}
+	case reflect.Map:
+		items, ok := value.(map[string]any)
+		if !ok {
+			return errors.New("expected object")
+		}
+		dst.Set(reflect.MakeMapWithSize(n.typ, len(items)))
+		for key, item := range items {
+			v := reflect.New(n.typ.Elem()).Elem()
+			if err := setValue(n.elem, v, item); err != nil {
+				return fmt.Errorf("map value: %w", err)
+			}
+			dst.SetMapIndex(reflect.ValueOf(key).Convert(n.typ.Key()), v)
+		}
+	case reflect.String:
+		s, ok := value.(string)
+		if !ok {
+			return errors.New("expected string")
+		}
+		dst.SetString(s)
+	case reflect.Bool:
+		v, ok := value.(bool)
+		if !ok {
+			return errors.New("expected boolean")
+		}
+		dst.SetBool(v)
+	default:
+		num, ok := value.(json.Number)
+		if !ok {
+			return errors.New("expected number")
+		}
+		switch n.typ.Kind() {
+		case reflect.Float32, reflect.Float64:
+			v, err := strconv.ParseFloat(string(num), n.typ.Bits())
+			if err != nil || math.IsInf(v, 0) || math.IsNaN(v) {
+				return errors.New("number out of range")
+			}
+			dst.SetFloat(v)
+		case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+			v, err := strconv.ParseUint(string(num), 10, n.typ.Bits())
+			if err != nil {
+				return errors.New("invalid unsigned integer")
+			}
+			dst.SetUint(v)
+		default:
+			v, err := strconv.ParseInt(string(num), 10, n.typ.Bits())
+			if err != nil {
+				return errors.New("invalid integer")
+			}
+			dst.SetInt(v)
+		}
+	}
+	return nil
+}
+
+// Token decoding rejects duplicate keys at every level (encoding/json normally
+// keeps the last value). Depth and body limits bound client-controlled work.
+func decodeValue(dec *json.Decoder, depth int) (any, error) {
+	if depth > 64 {
+		return nil, errors.New("JSON nesting exceeds 64")
+	}
+	token, err := dec.Token()
+	if err != nil {
+		return nil, err
+	}
+	switch token {
+	case json.Delim('{'):
+		object := map[string]any{}
+		for dec.More() {
+			key, err := dec.Token()
+			if err != nil {
+				return nil, err
+			}
+			name, ok := key.(string)
+			if !ok {
+				return nil, errors.New("invalid object key")
+			}
+			if _, exists := object[name]; exists {
+				return nil, errors.New("duplicate JSON field")
+			}
+			value, err := decodeValue(dec, depth+1)
+			if err != nil {
+				return nil, err
+			}
+			object[name] = value
+		}
+		end, err := dec.Token()
+		if err != nil || end != json.Delim('}') {
+			return nil, errors.New("unterminated object")
+		}
+		return object, nil
+	case json.Delim('['):
+		items := []any{}
+		for dec.More() {
+			v, err := decodeValue(dec, depth+1)
+			if err != nil {
+				return nil, err
+			}
+			items = append(items, v)
+		}
+		end, err := dec.Token()
+		if err != nil || end != json.Delim(']') {
+			return nil, errors.New("unterminated array")
+		}
+		return items, nil
+	default:
+		if _, bad := token.(json.Delim); bad {
+			return nil, errors.New("unexpected JSON delimiter")
+		}
+		return token, nil
+	}
+}

contract/contract.go

@@ -0,0 +1,457 @@
+// Package contract compiles API field tags into a reusable request binder and
+// OpenAPI schemas. Generated services and the CLI use the same compiler.
+package contract
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"reflect"
+	"regexp"
+	"strconv"
+	"strings"
+
+	"git.yuntuo.hk/k2safe/go-omni/openapi"
+	"github.com/go-playground/validator/v10"
+)
+
+const DefaultMaxBodyBytes int64 = 1 << 20
+
+var wireName = regexp.MustCompile(`^[a-z][A-Za-z0-9]*$`)
+var headerName = regexp.MustCompile(`^[A-Za-z][A-Za-z0-9-]*$`)
+var valuesValidator = validator.New()
+
+// Binder is immutable after compilation and safe for concurrent requests.
+type Binder struct {
+	root       *node
+	typ        reflect.Type
+	schemaOnly bool
+}
+type node struct {
+	scalar *Scalar
+	typ    reflect.Type
+	schema *openapi.Schema
+	fields []field
+	elem   *node
+}
+type field struct {
+	index        int
+	name, source string
+	value        *node
+	optional     bool
+	fallback     any
+	hasDefault   bool
+	binding      string
+}
+
+func New[T any](scalars ...Scalar) (*Binder, error) {
+	return ForType(reflect.TypeOf((*T)(nil)).Elem(), scalars...)
+}
+func MustNew[T any](scalars ...Scalar) *Binder {
+	b, err := New[T](scalars...)
+	if err != nil {
+		panic(err)
+	}
+	return b
+}
+
+// ForType also lets generators check the exact runtime contract before writing files.
+// The root must be a struct; custom marshalers require explicit scalar registration.
+func ForType(t reflect.Type, scalars ...Scalar) (*Binder, error) { return build(t, false, scalars) }
+
+// Describe compiles schemas without loading or executing application Go types.
+// The returned Binder cannot bind requests; it is for generators only.
+func Describe(t reflect.Type, scalars ...Scalar) (*Binder, error) { return build(t, true, scalars) }
+
+func build(t reflect.Type, schemaOnly bool, scalars []Scalar) (*Binder, error) {
+	if t == nil || t.Kind() != reflect.Struct {
+		return nil, errors.New("contract: root must be a struct")
+	}
+	c := compiler{scalars: map[reflect.Type]Scalar{}}
+	for _, scalar := range scalars {
+		if err := scalar.validate(schemaOnly); err != nil {
+			return nil, err
+		}
+		if _, exists := c.scalars[scalar.Type]; exists {
+			return nil, fmt.Errorf("contract: duplicate scalar type %s", scalar.Type)
+		}
+		c.scalars[scalar.Type] = scalar
+	}
+	budget := 10000
+	n, err := c.compile(t, true, map[reflect.Type]bool{}, 0, &budget)
+	if err != nil {
+		return nil, err
+	}
+	return &Binder{root: n, typ: t, schemaOnly: schemaOnly}, nil
+}
+
+func (c compiler) compile(t reflect.Type, root bool, stack map[reflect.Type]bool, depth int, budget *int) (*node, error) {
+	*budget--
+	if *budget < 0 {
+		return nil, errors.New("contract: schema expansion exceeds 10000 nodes")
+	}
+	if depth > 32 {
+		return nil, errors.New("contract: type nesting exceeds 32")
+	}
+	if stack[t] {
+		return nil, errors.New("contract: recursive types are not supported")
+	}
+	stack[t] = true
+	defer delete(stack, t)
+	n := &node{typ: t, schema: &openapi.Schema{}}
+	if scalar, ok := c.scalars[t]; ok {
+		if root {
+			return nil, errors.New("contract: root cannot be a scalar")
+		}
+		n.scalar = &scalar
+		n.schema = scalar.inputSchema()
+		return n, nil
+	}
+	// Wire behavior must be described completely by these tags.
+	marshaler := reflect.TypeOf((*json.Marshaler)(nil)).Elem()
+	unmarshaler := reflect.TypeOf((*json.Unmarshaler)(nil)).Elem()
+	if t.Kind() != reflect.Pointer && (t.Implements(marshaler) || reflect.PointerTo(t).Implements(marshaler) || t.Implements(unmarshaler) || reflect.PointerTo(t).Implements(unmarshaler)) {
+		return nil, errors.New("contract: custom JSON marshalers require explicit Scalar registration")
+	}
+	switch t.Kind() {
+	case reflect.Interface:
+		if t.NumMethod() != 0 {
+			return nil, errors.New("contract: only any / interface{} is supported")
+		}
+	case reflect.Pointer:
+		e, err := c.compile(t.Elem(), false, stack, depth+1, budget)
+		if err != nil {
+			return nil, err
+		}
+		n.elem = e
+		n.schema = nullableSchema(e.schema)
+	case reflect.String:
+		n.schema.Type = "string"
+	case reflect.Bool:
+		n.schema.Type = "boolean"
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		n.schema.Type = "integer"
+		if t.Bits() <= 32 {
+			n.schema.Format = "int32"
+		} else {
+			n.schema.Format = "int64"
+		}
+		if t.Kind() >= reflect.Uint && t.Kind() <= reflect.Uint64 {
+			v := float64(0)
+			n.schema.Minimum = &v
+			if t.Bits() < 64 {
+				max := float64((uint64(1) << uint(t.Bits())) - 1)
+				n.schema.Maximum = &max
+				if t.Bits() == 32 {
+					n.schema.Format = "int64"
+				}
+			} else {
+				n.schema.Format = ""
+			}
+		} else if t.Bits() < 32 {
+			min, max := -float64(int64(1)<<uint(t.Bits()-1)), float64((int64(1)<<uint(t.Bits()-1))-1)
+			n.schema.Minimum, n.schema.Maximum = &min, &max
+		}
+	case reflect.Float32, reflect.Float64:
+		n.schema.Type = "number"
+		if t.Kind() == reflect.Float32 {
+			n.schema.Format = "float"
+		} else {
+			n.schema.Format = "double"
+		}
+	case reflect.Slice, reflect.Map:
+		if t.Kind() == reflect.Map && t.Key().Kind() != reflect.String {
+			return nil, errors.New("contract: map keys must be strings")
+		}
+		if t.Kind() == reflect.Slice && t.Elem().Kind() == reflect.Uint8 && c.scalars[t.Elem()].Type == nil {
+			return nil, errors.New("contract: byte slices use base64 in Go; use string for binary data")
+		}
+		e, err := c.compile(t.Elem(), false, stack, depth+1, budget)
+		if err != nil {
+			return nil, err
+		}
+		n.elem = e
+		if t.Kind() == reflect.Slice {
+			n.schema.Type = "array"
+			n.schema.Items = e.schema
+		} else {
+			n.schema.Type = "object"
+			n.schema.AdditionalProperties = e.schema
+		}
+	case reflect.Struct:
+		n.schema.Type = "object"
+		allowed := false
+		n.schema.AdditionalPropertiesAllowed = &allowed
+		n.schema.Properties = map[string]*openapi.Schema{}
+		seen := map[string]bool{}
+		for i := 0; i < t.NumField(); i++ {
+			sf := t.Field(i)
+			if sf.PkgPath != "" || sf.Anonymous {
+				return nil, fmt.Errorf("contract: %s must be an exported named field", sf.Name)
+			}
+			f, err := c.compileField(sf, root, stack, depth+1, budget)
+			if err != nil {
+				return nil, fmt.Errorf("contract: %s: %w", sf.Name, err)
+			}
+			f.index = i
+			key := f.source + ":" + strings.ToLower(f.name)
+			if seen[key] {
+				return nil, fmt.Errorf("contract: duplicate field %s", f.name)
+			}
+			seen[key] = true
+			n.fields = append(n.fields, f)
+			if f.source == "json" {
+				n.schema.Properties[f.name] = f.value.schema
+				if !f.optional && !f.hasDefault {
+					n.schema.Required = append(n.schema.Required, f.name)
+				}
+			}
+		}
+	default:
+		return nil, fmt.Errorf("contract: unsupported type %s", t)
+	}
+	return n, nil
+}
+
+func (c compiler) compileField(sf reflect.StructField, root bool, stack map[reflect.Type]bool, depth int, budget *int) (field, error) {
+	f := field{}
+	// Reject typos and unsupported tags instead of silently losing validation.
+	tags, err := ParseTags(string(sf.Tag))
+	if err != nil {
+		return f, err
+	}
+	var sourceTag string
+	for key, value := range tags {
+		switch key {
+		case "json", "path", "form", "header":
+			if value == "-" {
+				return f, errors.New("ignored fields are not part of an API contract")
+			}
+			if f.source != "" {
+				return f, errors.New("exactly one source tag is required")
+			}
+			f.source = key
+			sourceTag = value
+		case "binding":
+			f.binding = value
+		default:
+			return f, fmt.Errorf("unsupported tag %q", key)
+		}
+	}
+	if f.source == "" {
+		return f, errors.New("json, path, form or header tag required")
+	}
+	if !root && f.source != "json" {
+		return f, errors.New("nested fields must use json tags")
+	}
+	parts := strings.Split(sourceTag, ",")
+	f.name = parts[0]
+	if (f.source == "header" && !headerName.MatchString(f.name)) || (f.source != "header" && !wireName.MatchString(f.name)) {
+		return f, errors.New("wire names must be lowerCamelCase (headers use HTTP names)")
+	}
+	n, err := c.compile(sf.Type, false, stack, depth, budget)
+	if err != nil {
+		return f, err
+	}
+	f.value = n
+	opaque := base(n).scalar
+	isList := base(n).typ.Kind() == reflect.Slice && opaque == nil
+	if isList {
+		opaque = base(base(n).elem).scalar
+	}
+	if opaque != nil {
+		if isList && (f.source == "path" || f.source == "header") {
+			return f, errors.New("path/header values must be scalars")
+		}
+		if f.source != "json" && !opaque.Text {
+			return f, errors.New("custom scalar needs text: true and UnmarshalText for path/query/header")
+		}
+		if f.binding != "" {
+			return f, errors.New("custom scalar constraints belong in its decoder; use optional/pointer for presence and null")
+		}
+		for _, option := range parts[1:] {
+			if option != "optional" && option != "omitempty" {
+				return f, errors.New("custom scalar supports only optional/omitempty field options")
+			}
+			f.optional = true
+		}
+		if f.source == "path" && (f.optional || sf.Type.Kind() == reflect.Pointer) {
+			return f, errors.New("path fields must be required non-pointer values")
+		}
+		return f, nil
+	}
+	scalar := base(n).typ.Kind()
+	if f.source != "json" && !isScalar(scalar) && !(scalar == reflect.Slice && isScalar(base(base(n).elem).typ.Kind())) {
+		return f, errors.New("path/query/header values must be scalars or scalar slices")
+	}
+	if f.source == "path" && !isScalar(scalar) {
+		return f, errors.New("path values must be scalars")
+	}
+	if f.source == "header" && !isScalar(scalar) {
+		return f, errors.New("header values must be scalars")
+	}
+	options := map[string]bool{}
+	for _, option := range parts[1:] {
+		key, value, _ := strings.Cut(option, "=")
+		if options[key] {
+			return f, fmt.Errorf("duplicate option %q", key)
+		}
+		options[key] = true
+		switch key {
+		case "optional", "omitempty":
+			if option != key {
+				return f, errors.New("optional takes no value")
+			}
+			f.optional = true
+		case "default":
+			if !isScalar(scalar) {
+				return f, errors.New("default requires a scalar")
+			}
+			v, e := parseScalar(value, base(n).typ)
+			if e != nil {
+				return f, fmt.Errorf("invalid default: %w", e)
+			}
+			f.fallback = v
+			f.hasDefault = true
+			n.schema.Default = v
+		case "options":
+			if !isScalar(scalar) || value == "" {
+				return f, errors.New("options requires scalar values")
+			}
+			for _, s := range strings.Split(value, "|") {
+				v, e := parseScalar(s, base(n).typ)
+				if e != nil {
+					return f, e
+				}
+				n.schema.Enum = append(n.schema.Enum, v)
+			}
+		case "range":
+			if !isNumber(scalar) {
+				return f, errors.New("range requires numeric type")
+			}
+			if err = applyRange(n.schema, value); err != nil {
+				return f, err
+			}
+		default:
+			return f, fmt.Errorf("unsupported field option %q", option)
+		}
+	}
+	if err = applyBinding(&f); err != nil {
+		return f, err
+	}
+	if n.schema.Nullable && len(n.schema.Enum) > 0 {
+		n.schema.Enum = append(n.schema.Enum, nil)
+	}
+	if f.source == "path" && (f.optional || f.hasDefault || sf.Type.Kind() == reflect.Pointer) {
+		return f, errors.New("path fields must be required non-pointer values")
+	}
+	if f.hasDefault {
+		v := reflect.New(sf.Type).Elem()
+		if err = setValue(n, v, f.fallback); err != nil {
+			return f, err
+		}
+		if err = checkField(f, v); err != nil {
+			return f, fmt.Errorf("default violates validation: %w", err)
+		}
+	}
+	return f, nil
+}
+
+// ParseTags strictly parses Go struct tags, including duplicate/unknown key checks
+// performed by the compiler. It is also used to normalize generated Go JSON tags.
+func ParseTags(raw string) (map[string]string, error) {
+	out := map[string]string{}
+	for strings.TrimSpace(raw) != "" {
+		raw = strings.TrimLeft(raw, " ")
+		i := strings.Index(raw, ":")
+		if i < 1 {
+			return nil, errors.New("invalid struct tag")
+		}
+		key := raw[:i]
+		raw = raw[i+1:]
+		if strings.ContainsAny(key, " \t\r\n\"`") || len(raw) == 0 || raw[0] != '"' {
+			return nil, errors.New("invalid struct tag")
+		}
+		end := 1
+		for end < len(raw) {
+			if raw[end] == '\\' {
+				end += 2
+				continue
+			}
+			if raw[end] == '"' {
+				break
+			}
+			end++
+		}
+		if end >= len(raw) {
+			return nil, errors.New("unterminated struct tag")
+		}
+		v, err := strconv.Unquote(raw[:end+1])
+		if err != nil {
+			return nil, err
+		}
+		if _, ok := out[key]; ok {
+			return nil, fmt.Errorf("duplicate tag %q", key)
+		}
+		out[key] = v
+		raw = raw[end+1:]
+		if raw != "" && raw[0] != ' ' {
+			return nil, errors.New("struct tags require spaces")
+		}
+	}
+	return out, nil
+}
+
+func base(n *node) *node {
+	for n.typ.Kind() == reflect.Pointer {
+		n = n.elem
+	}
+	return n
+}
+func isNumber(k reflect.Kind) bool {
+	return k >= reflect.Int && k <= reflect.Float64 && k != reflect.Uintptr
+}
+func isScalar(k reflect.Kind) bool { return k == reflect.String || k == reflect.Bool || isNumber(k) }
+
+func (b *Binder) BodySchema() *openapi.Schema {
+	if len(b.root.schema.Properties) == 0 {
+		return nil
+	}
+	return copySchema(b.root.schema)
+}
+
+// ResponseSchema rejects request-only fields to keep response docs honest.
+func (b *Binder) ResponseSchema() (*openapi.Schema, error) {
+	for _, f := range b.root.fields {
+		if f.source != "json" {
+			return nil, errors.New("contract: response fields must use json tags")
+		}
+	}
+	return responseSchema(b.root), nil
+}
+func (b *Binder) Parameters() []openapi.Parameter {
+	var out []openapi.Parameter
+	for _, f := range b.root.fields {
+		if f.source == "json" {
+			continue
+		}
+		in := f.source
+		if in == "form" {
+			in = "query"
+		}
+		schema := copySchema(f.value.schema)
+		if base(f.value).scalar != nil {
+			schema = &openapi.Schema{Type: "string"}
+		} else if base(f.value).typ.Kind() == reflect.Slice && base(base(f.value).elem).scalar != nil {
+			schema.Items = &openapi.Schema{Type: "string"}
+		}
+		out = append(out, openapi.Parameter{Name: f.name, In: in, Required: !f.optional && !f.hasDefault, Schema: schema})
+	}
+	return out
+}
+func copySchema(s *openapi.Schema) *openapi.Schema {
+	data, _ := json.Marshal(s)
+	var out openapi.Schema
+	_ = json.Unmarshal(data, &out)
+	return &out
+}

contract/contract_test.go

@@ -0,0 +1,244 @@
+package contract
+
+import (
+	"encoding/json"
+	"net/http/httptest"
+	"reflect"
+	"strings"
+	"sync"
+	"testing"
+
+	apierrors "git.yuntuo.hk/k2safe/go-omni/errors"
+)
+
+type address struct {
+	City string `json:"city" binding:"required,max=30"`
+}
+type mixed struct {
+	ID      int64              `path:"userId,range=[1:100]"`
+	Page    int                `form:"page,default=1,range=[1:50]"`
+	Tags    []string           `form:"tag,optional" binding:"max=3"`
+	Client  string             `header:"X-Client"`
+	Name    string             `json:"name" binding:"required,max=20"`
+	Active  bool               `json:"active"`
+	Count   *int               `json:"count,optional"`
+	Contact address            `json:"contact"`
+	Items   []address          `json:"items,optional"`
+	Labels  map[string]address `json:"labels,optional"`
+}
+
+const validBody = `{"name":"小明","active":false,"count":0,"contact":{"city":"杭州"}}`
+
+func bindMixed(body, query string) (mixed, error) {
+	b := MustNew[mixed]()
+	r := httptest.NewRequest("POST", "/users/7"+query, strings.NewReader(body))
+	r.Header.Set("Content-Type", "application/json")
+	r.Header.Set("X-Client", "web")
+	var v mixed
+	return v, b.Bind(r, map[string]string{"userId": "7"}, &v)
+}
+func TestMixedSourcesAndPresence(t *testing.T) {
+	b := MustNew[mixed]()
+	r := httptest.NewRequest("POST", "/users/7?tag=a&tag=b&userId=99&name=query", strings.NewReader(validBody))
+	r.Header.Set("Content-Type", "application/json; charset=utf-8")
+	r.Header.Set("X-Client", "web")
+	v := mixed{Name: "previous"}
+	if err := b.Bind(r, map[string]string{"userId": "7"}, &v); err != nil {
+		t.Fatal(err)
+	}
+	if v.ID != 7 || v.Page != 1 || v.Name != "小明" || v.Active || v.Count == nil || *v.Count != 0 || len(v.Tags) != 2 || v.Client != "web" || v.Contact.City != "杭州" {
+		t.Fatalf("bad binding: %+v", v)
+	}
+	r = httptest.NewRequest("POST", "/", strings.NewReader(strings.Replace(validBody, `,"count":0`, "", 1)))
+	r.Header.Set("Content-Type", "application/json")
+	r.Header.Set("X-Client", "web")
+	if err := b.Bind(r, map[string]string{"userId": "7"}, &v); err != nil || v.Count != nil {
+		t.Fatalf("missing != zero: %+v %v", v, err)
+	}
+}
+func TestRejectInvalidRequests(t *testing.T) {
+	cases := []struct{ name, body, query string }{
+		{"missing", `{"name":"a","contact":{"city":"杭州"}}`, ""},
+		{"empty", strings.Replace(validBody, `"小明"`, `""`, 1), ""},
+		{"caseSensitive", strings.Replace(validBody, `"name"`, `"Name"`, 1), ""},
+		{"unknown", strings.Replace(validBody, `"active":false`, `"active":false,"extra":1`, 1), ""},
+		{"duplicate", strings.Replace(validBody, `"active":false`, `"active":false,"active":true`, 1), ""},
+		{"nestedDuplicate", strings.Replace(validBody, `"city":"杭州"`, `"city":"杭州","city":"北京"`, 1), ""},
+		{"nestedRequired", strings.Replace(validBody, `{"city":"杭州"}`, `{}`, 1), ""},
+		{"nestedUnknown", strings.Replace(validBody, `{"city":"杭州"}`, `{"city":"杭州","other":0}`, 1), ""},
+		{"trailing", validBody + ` {}`, ""},
+		{"null", strings.Replace(validBody, `false`, `null`, 1), ""},
+		{"numberOverflow", strings.Replace(validBody, `"count":0`, `"count":99999999999999999999`, 1), ""},
+		{"arrayValidation", strings.TrimSuffix(validBody, "}") + `,"items":[{"city":""}]}`, ""},
+		{"mapValidation", strings.TrimSuffix(validBody, "}") + `,"labels":{"home":{"city":""}}}`, ""},
+		{"queryDuplicate", validBody, "?page=1&page=2"},
+		{"queryDefaultNotOnEmpty", validBody, "?page="},
+		{"range", validBody, "?page=51"},
+		{"malformedQuery", validBody, "?page=%zz"},
+		{"arrayLimit", validBody, "?tag=a&tag=b&tag=c&tag=d"},
+	}
+	b := MustNew[mixed]()
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			r := httptest.NewRequest("POST", "/"+tc.query, strings.NewReader(tc.body))
+			r.Header.Set("Content-Type", "application/json")
+			r.Header.Set("X-Client", "web")
+			v := mixed{Name: "unchanged"}
+			err := b.Bind(r, map[string]string{"userId": "7"}, &v)
+			if err == nil || apierrors.From(err).Status != 400 {
+				t.Fatalf("wanted 400: %v", err)
+			}
+			if v.Name != "unchanged" || v.Page != 0 {
+				t.Fatal("failed binding modified target")
+			}
+		})
+	}
+}
+func TestBodyLimitsAndMediaType(t *testing.T) {
+	type request struct {
+		Name string `json:"name"`
+	}
+	b := MustNew[request]()
+	for _, tc := range []struct {
+		body, ct string
+		limit    int64
+		status   int
+	}{
+		{`{"name":"x"}`, "text/plain", 100, 415},
+		{`{"name":"long"}`, "application/json", 10, 413},
+		{`{"name":"x"}` + strings.Repeat(" ", 2048), "application/json", 1024, 413},
+		{`{"name":"x"}`, "application/json", 12, 0},
+	} {
+		r := httptest.NewRequest("POST", "/", strings.NewReader(tc.body))
+		r.ContentLength = -1
+		r.Header.Set("Content-Type", tc.ct)
+		var req request
+		err := b.Bind(r, nil, &req, tc.limit)
+		if tc.status == 0 {
+			if err != nil {
+				t.Fatal(err)
+			}
+		} else if err == nil || apierrors.From(err).Status != tc.status {
+			t.Fatalf("status %d wanted: %v", tc.status, err)
+		}
+	}
+}
+func TestSchemaUsesSameRules(t *testing.T) {
+	b := MustNew[mixed]()
+	s := b.BodySchema()
+	if len(s.Required) != 3 || s.Properties["count"].Nullable != true || s.Properties["name"].MaxLength == nil || *s.Properties["name"].MaxLength != 20 {
+		t.Fatalf("wrong schema: %+v", s)
+	}
+	encoded, err := json.Marshal(s)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !strings.Contains(string(encoded), `"additionalProperties":false`) {
+		t.Fatal(string(encoded))
+	}
+	params := b.Parameters()
+	if len(params) != 4 || params[1].Required || params[1].Schema.Default != json.Number("1") {
+		t.Fatalf("wrong parameters: %+v", params)
+	}
+	// Returned documentation snapshots do not mutate concurrent binders.
+	s.Properties["name"].MaxLength = nil
+	if b.BodySchema().Properties["name"].MaxLength == nil {
+		t.Fatal("shared schema")
+	}
+	if _, err = b.ResponseSchema(); err == nil {
+		t.Fatal("request sources in response accepted")
+	}
+}
+func TestRulesAndConcurrentReuse(t *testing.T) {
+	type req struct {
+		Score float64 `json:"score,options=1.0|2,range=(0:2]"`
+		Email string  `json:"email" binding:"email"`
+		Value *int    `json:"value" binding:"required"`
+	}
+	b := MustNew[req]()
+	var wg sync.WaitGroup
+	for i := 0; i < 24; i++ {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			r := httptest.NewRequest("POST", "/", strings.NewReader(`{"score":1,"email":"a@example.com","value":3}`))
+			r.Header.Set("Content-Type", "application/json")
+			var v req
+			if err := b.Bind(r, nil, &v); err != nil {
+				t.Error(err)
+			}
+		}()
+	}
+	wg.Wait()
+	for _, body := range []string{`{"score":0,"email":"a@example.com","value":1}`, `{"score":2,"email":"bad","value":1}`, `{"score":2,"email":"a@example.com","value":null}`, `{"score":2,"email":"a@example.com","value":0}`} {
+		r := httptest.NewRequest("POST", "/", strings.NewReader(body))
+		r.Header.Set("Content-Type", "application/json")
+		var v req
+		if err := b.Bind(r, nil, &v); err == nil {
+			t.Fatal(body)
+		}
+	}
+}
+func TestInvalidContracts(t *testing.T) {
+	for _, tag := range []string{`json:"bad_name"`, `json:"a" form:"a"`, `json:"a,optionl"`, `json:"a,range=[5:2]"`, `json:"a,default=20,range=[1:10]"`, `json:"a,optional" binding:"required"`, `json:"a" binding:"unknown"`, `path:"a,optional"`, `json:"a" json:"b"`, `jsoon:"a"`, `json:"a,options=x"`} {
+		typ := reflect.StructOf([]reflect.StructField{{Name: "Value", Type: reflect.TypeOf(0), Tag: reflect.StructTag(tag)}})
+		if _, err := ForType(typ); err == nil {
+			t.Fatalf("accepted %s", tag)
+		}
+	}
+}
+
+func TestExactLargeIntegerConstraints(t *testing.T) {
+	type req struct {
+		Value int64 `json:"value,range=[:9007199254740992]"`
+	}
+	b := MustNew[req]()
+	for _, tc := range []struct {
+		body  string
+		valid bool
+	}{{`{"value":9007199254740992}`, true}, {`{"value":9007199254740993}`, false}} {
+		r := httptest.NewRequest("POST", "/", strings.NewReader(tc.body))
+		r.Header.Set("Content-Type", "application/json")
+		var v req
+		if err := b.Bind(r, nil, &v); (err == nil) != tc.valid {
+			t.Fatalf("%s: %v", tc.body, err)
+		}
+	}
+	type defaults struct {
+		Value uint64 `form:"value,default=18446744073709551615,options=18446744073709551615"`
+	}
+	d := MustNew[defaults]()
+	data, err := json.Marshal(d.Parameters())
+	if err != nil || !strings.Contains(string(data), "18446744073709551615") {
+		t.Fatalf("lost precision: %s %v", data, err)
+	}
+}
+
+func TestIntrinsicIntegerBounds(t *testing.T) {
+	type req struct {
+		Small uint8  `json:"small,range=[-1:500]"`
+		Wide  uint64 `json:"wide"`
+	}
+	b := MustNew[req]()
+	s := b.BodySchema()
+	if *s.Properties["small"].Minimum != 0 || *s.Properties["small"].Maximum != 255 || s.Properties["wide"].Format != "" {
+		t.Fatalf("wrong integer bounds: %+v", s.Properties)
+	}
+}
+
+func FuzzStrictBody(f *testing.F) {
+	for _, seed := range []string{validBody, `{}`, `{"name":"a","name":"b"}`, `[null]`, `{"x":[]}`} {
+		f.Add(seed)
+	}
+	binder := MustNew[mixed]()
+	f.Fuzz(func(t *testing.T, body string) {
+		if len(body) > 16384 {
+			t.Skip()
+		}
+		req := httptest.NewRequest("POST", "/", strings.NewReader(body))
+		req.Header.Set("Content-Type", "application/json")
+		req.Header.Set("X-Client", "fuzz")
+		var value mixed
+		_ = binder.Bind(req, map[string]string{"userId": "1"}, &value, 16384)
+	})
+}

contract/rules.go

@@ -0,0 +1,259 @@
+package contract
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"math"
+	"reflect"
+	"strconv"
+	"strings"
+	"unicode/utf8"
+
+	"git.yuntuo.hk/k2safe/go-omni/openapi"
+)
+
+func applyRange(s *openapi.Schema, value string) error {
+	if len(value) < 3 || (value[0] != '[' && value[0] != '(') || (value[len(value)-1] != ']' && value[len(value)-1] != ')') {
+		return errors.New("invalid range: use [min:max], (min:max), or mixed bounds")
+	}
+	lo, hi, ok := strings.Cut(value[1:len(value)-1], ":")
+	if !ok || (lo == "" && hi == "") {
+		return errors.New("invalid numeric range")
+	}
+	if lo != "" {
+		v, err := bound(lo)
+		if err != nil {
+			return err
+		}
+		if s.Minimum == nil || v > *s.Minimum || (v == *s.Minimum && value[0] == '(') {
+			s.Minimum = &v
+			s.ExclusiveMinimum = value[0] == '('
+		}
+	}
+	if hi != "" {
+		v, err := bound(hi)
+		if err != nil {
+			return err
+		}
+		if s.Maximum == nil || v < *s.Maximum || (v == *s.Maximum && value[len(value)-1] == ')') {
+			s.Maximum = &v
+			s.ExclusiveMaximum = value[len(value)-1] == ')'
+		}
+	}
+	return checkBounds(s)
+}
+func bound(s string) (float64, error) {
+	v, err := strconv.ParseFloat(s, 64)
+	if err != nil || math.IsInf(v, 0) || math.IsNaN(v) || math.Abs(v) > 1<<53 {
+		return 0, errors.New("constraint bound must be finite and within ±2^53")
+	}
+	return v, nil
+}
+func checkBounds(s *openapi.Schema) error {
+	if s.Minimum != nil && s.Maximum != nil && (*s.Minimum > *s.Maximum || (*s.Minimum == *s.Maximum && (s.ExclusiveMinimum || s.ExclusiveMaximum))) {
+		return errors.New("empty numeric range")
+	}
+	if s.MinLength != nil && s.MaxLength != nil && *s.MinLength > *s.MaxLength {
+		return errors.New("empty string length range")
+	}
+	if s.MinItems != nil && s.MaxItems != nil && *s.MinItems > *s.MaxItems {
+		return errors.New("empty array length range")
+	}
+	return nil
+}
+func applyBinding(f *field) error {
+	if f.binding == "" {
+		return nil
+	}
+	n := base(f.value)
+	k := n.typ.Kind()
+	s := f.value.schema
+	seen := map[string]bool{}
+	for _, rule := range strings.Split(f.binding, ",") {
+		name, value, _ := strings.Cut(rule, "=")
+		if seen[name] {
+			return fmt.Errorf("duplicate binding rule %s", name)
+		}
+		seen[name] = true
+		switch name {
+		case "required":
+			if rule != name || f.optional || f.hasDefault {
+				return errors.New("required conflicts with optional/default")
+			}
+			if !isScalar(k) {
+				return errors.New("binding required supports scalars; other fields are already required by presence")
+			}
+			s.Nullable = false
+			switch k {
+			case reflect.String:
+				one := 1
+				s.MinLength = &one
+			case reflect.Bool:
+				s.Not = &openapi.Schema{Enum: []any{false}}
+			default:
+				s.Not = &openapi.Schema{Enum: []any{0}}
+			}
+		case "email":
+			if rule != name || k != reflect.String {
+				return errors.New("email requires a string")
+			}
+			s.Format = "email"
+		case "min", "max", "len":
+			if k == reflect.String || k == reflect.Slice {
+				v, err := strconv.Atoi(value)
+				if err != nil || v < 0 {
+					return errors.New("length constraints must be nonnegative integers")
+				}
+				if k == reflect.String {
+					if name == "min" || name == "len" {
+						if s.MinLength == nil || v > *s.MinLength {
+							s.MinLength = &v
+						}
+					}
+					if name == "max" || name == "len" {
+						s.MaxLength = &v
+					}
+				} else {
+					if name == "min" || name == "len" {
+						s.MinItems = &v
+					}
+					if name == "max" || name == "len" {
+						s.MaxItems = &v
+					}
+				}
+			} else if isNumber(k) && name != "len" {
+				v, err := bound(value)
+				if err != nil {
+					return err
+				}
+				if name == "min" {
+					if s.Minimum == nil || v > *s.Minimum {
+						s.Minimum = &v
+						s.ExclusiveMinimum = false
+					}
+				} else {
+					if s.Maximum == nil || v < *s.Maximum {
+						s.Maximum = &v
+						s.ExclusiveMaximum = false
+					}
+				}
+			} else {
+				return fmt.Errorf("%s requires a number, string or slice", name)
+			}
+		default:
+			return fmt.Errorf("unsupported binding rule %q; use required,min,max,len,email or source-tag options/range", name)
+		}
+	}
+	return checkBounds(s)
+}
+
+func parseScalar(raw string, t reflect.Type) (any, error) {
+	switch t.Kind() {
+	case reflect.String:
+		return raw, nil
+	case reflect.Bool:
+		if raw == "true" {
+			return true, nil
+		}
+		if raw == "false" {
+			return false, nil
+		}
+		return nil, errors.New("expected true or false")
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		v, err := strconv.ParseInt(raw, 10, t.Bits())
+		if err != nil {
+			return nil, errors.New("invalid integer")
+		}
+		return json.Number(strconv.FormatInt(v, 10)), nil
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		v, err := strconv.ParseUint(raw, 10, t.Bits())
+		if err != nil {
+			return nil, errors.New("invalid unsigned integer")
+		}
+		return json.Number(strconv.FormatUint(v, 10)), nil
+	case reflect.Float32, reflect.Float64:
+		v, err := strconv.ParseFloat(raw, t.Bits())
+		if err != nil || math.IsInf(v, 0) || math.IsNaN(v) {
+			return nil, errors.New("invalid finite number")
+		}
+		return json.Number(strconv.FormatFloat(v, 'g', -1, t.Bits())), nil
+	}
+	return nil, errors.New("expected scalar")
+}
+
+func checkField(f field, v reflect.Value) error {
+	if v.Kind() == reflect.Pointer {
+		if v.IsNil() {
+			if strings.Contains(","+f.binding+",", ",required,") {
+				return errors.New("must not be null")
+			}
+			return nil
+		}
+		v = v.Elem()
+	}
+	if strings.Contains(","+f.binding+",", ",required,") && v.IsZero() {
+		return errors.New("must not be zero or empty")
+	}
+	s := f.value.schema
+	if s.Format == "email" && valuesValidator.Var(v.Interface(), "email") != nil {
+		return errors.New("invalid email")
+	}
+	if len(s.Enum) > 0 {
+		found := false
+		for _, item := range s.Enum {
+			option := reflect.New(v.Type()).Elem()
+			if setValue(base(f.value), option, item) == nil && reflect.DeepEqual(option.Interface(), v.Interface()) {
+				found = true
+				break
+			}
+		}
+		if !found {
+			return errors.New("not an allowed option")
+		}
+	}
+	if isNumber(v.Kind()) {
+		var number float64
+		switch v.Kind() {
+		case reflect.Float32, reflect.Float64:
+			number = v.Float()
+		case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+			number = float64(v.Uint())
+			if v.Uint() > 1<<53 {
+				number = math.Inf(1)
+			}
+		default:
+			number = float64(v.Int())
+			if v.Int() > 1<<53 {
+				number = math.Inf(1)
+			} else if v.Int() < -(1 << 53) {
+				number = math.Inf(-1)
+			}
+		}
+		if s.Minimum != nil && (number < *s.Minimum || (s.ExclusiveMinimum && number == *s.Minimum)) {
+			return errors.New("below minimum")
+		}
+		if s.Maximum != nil && (number > *s.Maximum || (s.ExclusiveMaximum && number == *s.Maximum)) {
+			return errors.New("above maximum")
+		}
+	}
+	if v.Kind() == reflect.String {
+		size := utf8.RuneCountInString(v.String())
+		if s.MinLength != nil && size < *s.MinLength {
+			return errors.New("string too short")
+		}
+		if s.MaxLength != nil && size > *s.MaxLength {
+			return errors.New("string too long")
+		}
+	}
+	if v.Kind() == reflect.Slice {
+		size := v.Len()
+		if s.MinItems != nil && size < *s.MinItems {
+			return errors.New("too few items")
+		}
+		if s.MaxItems != nil && size > *s.MaxItems {
+			return errors.New("too many items")
+		}
+	}
+	return nil
+}

contract/scalar.go

@@ -0,0 +1,199 @@
+package contract
+
+import (
+	"encoding"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"reflect"
+	"strconv"
+	"strings"
+
+	"git.yuntuo.hk/k2safe/go-omni/openapi"
+)
+
+// Scalar explicitly opts one application Go type into custom wire conversion.
+// Input is a | separated union of scalar wire types; Output is one wire type.
+// The value must implement json.Marshaler, its pointer json.Unmarshaler, and
+// Text=true additionally requires encoding.TextUnmarshaler on the pointer.
+// No process-global registry or mutation of other binders is involved.
+type Scalar struct {
+	Type                  reflect.Type
+	JSONInput, JSONOutput string
+	Text                  bool
+}
+
+func ScalarOf[T any](input, output string, text bool) Scalar {
+	return Scalar{Type: reflect.TypeOf((*T)(nil)).Elem(), JSONInput: input, JSONOutput: output, Text: text}
+}
+
+type compiler struct {
+	scalars map[reflect.Type]Scalar
+}
+type scalarText string
+
+func (s Scalar) validate(schemaOnly bool) error {
+	if s.Type == nil || s.Type.Kind() == reflect.Pointer || s.Type.Kind() == reflect.Interface {
+		return errors.New("contract: scalar requires a concrete non-pointer type")
+	}
+	seen := map[string]bool{}
+	for _, kind := range strings.Split(s.JSONInput, "|") {
+		kind = strings.TrimSpace(kind)
+		if wireSchema(kind) == nil || seen[kind] {
+			return fmt.Errorf("contract: invalid/duplicate scalar input %q", kind)
+		}
+		seen[kind] = true
+	}
+	if wireSchema(s.JSONOutput) == nil {
+		return fmt.Errorf("contract: invalid scalar output %q", s.JSONOutput)
+	}
+	if !schemaOnly {
+		if !s.Type.Implements(reflect.TypeOf((*json.Marshaler)(nil)).Elem()) || !reflect.PointerTo(s.Type).Implements(reflect.TypeOf((*json.Unmarshaler)(nil)).Elem()) {
+			return fmt.Errorf("contract: %s needs value MarshalJSON and pointer UnmarshalJSON", s.Type)
+		}
+		if s.Text && !reflect.PointerTo(s.Type).Implements(reflect.TypeOf((*encoding.TextUnmarshaler)(nil)).Elem()) {
+			return fmt.Errorf("contract: %s needs UnmarshalText", s.Type)
+		}
+	}
+	return nil
+}
+func wireSchema(kind string) *openapi.Schema {
+	switch kind {
+	case "string":
+		return &openapi.Schema{Type: "string"}
+	case "bool":
+		return &openapi.Schema{Type: "boolean"}
+	case "int32", "int64":
+		return &openapi.Schema{Type: "integer", Format: kind}
+	case "float64":
+		return &openapi.Schema{Type: "number", Format: "double"}
+	}
+	return nil
+}
+func (s Scalar) inputSchema() *openapi.Schema {
+	var alternatives []*openapi.Schema
+	for _, kind := range strings.Split(s.JSONInput, "|") {
+		alternatives = append(alternatives, wireSchema(strings.TrimSpace(kind)))
+	}
+	if len(alternatives) == 1 {
+		return alternatives[0]
+	}
+	return &openapi.Schema{AnyOf: alternatives}
+}
+func (s Scalar) decode(dst reflect.Value, value any) (err error) {
+	// User decoders may fail; do not allow their panic to escape a binder.
+	defer func() {
+		if r := recover(); r != nil {
+			err = errors.New("custom scalar decoder panicked")
+		}
+	}()
+	if text, ok := value.(scalarText); ok {
+		decoder, ok := dst.Addr().Interface().(encoding.TextUnmarshaler)
+		if !s.Text || !ok {
+			return errors.New("text decoder not available")
+		}
+		return decoder.UnmarshalText([]byte(text))
+	}
+	allowed := false
+	for _, kind := range strings.Split(s.JSONInput, "|") {
+		if scalarAccepts(strings.TrimSpace(kind), value) {
+			allowed = true
+			break
+		}
+	}
+	if !allowed {
+		return errors.New("value does not match declared scalar input")
+	}
+	decoder, ok := dst.Addr().Interface().(json.Unmarshaler)
+	if !ok {
+		return errors.New("JSON decoder not available")
+	}
+	raw, err := json.Marshal(value) // json.Number preserves exact integer tokens.
+	if err != nil {
+		return err
+	}
+	return decoder.UnmarshalJSON(raw)
+}
+func scalarAccepts(kind string, value any) bool {
+	switch kind {
+	case "string":
+		_, ok := value.(string)
+		return ok
+	case "bool":
+		_, ok := value.(bool)
+		return ok
+	case "int32", "int64":
+		n, ok := value.(json.Number)
+		if !ok {
+			return false
+		}
+		bits := 64
+		if kind == "int32" {
+			bits = 32
+		}
+		_, err := strconv.ParseInt(string(n), 10, bits)
+		return err == nil
+	case "float64":
+		n, ok := value.(json.Number)
+		if !ok {
+			return false
+		}
+		_, err := strconv.ParseFloat(string(n), 64)
+		return err == nil
+	}
+	return false
+}
+func responseSchema(n *node) *openapi.Schema {
+	b := base(n)
+	if b.scalar != nil {
+		s := wireSchema(b.scalar.JSONOutput)
+		if n.typ.Kind() == reflect.Pointer {
+			s = nullableSchema(s)
+		}
+		return s
+	}
+	// Preserve the field's own constraints (including pointer range/enum and
+	// collection length) while changing only nested custom scalar wire types.
+	s := copySchema(n.schema)
+	if b.typ.Kind() == reflect.Slice {
+		s.Items = responseSchema(b.elem)
+	}
+	if b.typ.Kind() == reflect.Map {
+		s.AdditionalProperties = responseSchema(b.elem)
+	}
+	for _, f := range b.fields {
+		if f.source == "json" {
+			s.Properties[f.name] = responseSchema(f.value)
+		}
+	}
+	return s
+}
+
+// ValidateScalars checks the application's explicitly registered method contracts.
+func ValidateScalars(scalars ...Scalar) error {
+	seen := map[reflect.Type]bool{}
+	for _, s := range scalars {
+		if err := s.validate(false); err != nil {
+			return err
+		}
+		if seen[s.Type] {
+			return fmt.Errorf("contract: duplicate scalar type %s", s.Type)
+		}
+		seen[s.Type] = true
+	}
+	return nil
+}
+
+// OpenAPI 3.0 nullable only applies alongside an explicit type. A union needs
+// an explicit null alternative; an unconstrained dynamic schema already accepts null.
+func nullableSchema(schema *openapi.Schema) *openapi.Schema {
+	s := copySchema(schema)
+	if s.Type != "" {
+		s.Nullable = true
+		return s
+	}
+	if len(s.AnyOf) > 0 {
+		s.AnyOf = append(s.AnyOf, &openapi.Schema{Type: "string", Nullable: true, Enum: []any{nil}})
+	}
+	return s
+}

contract/scalar_test.go

@@ -0,0 +1,222 @@
+package contract
+
+import (
+	"encoding/json"
+	apierrors "git.yuntuo.hk/k2safe/go-omni/errors"
+	"net/http"
+	"net/http/httptest"
+	"reflect"
+	"strconv"
+	"strings"
+	"testing"
+)
+
+type flexibleID int64
+
+func (v flexibleID) MarshalJSON() ([]byte, error) {
+	return json.Marshal(strconv.FormatInt(int64(v), 10))
+}
+func (v *flexibleID) UnmarshalJSON(b []byte) error {
+	var s string
+	if len(b) > 0 && b[0] == '"' {
+		if err := json.Unmarshal(b, &s); err != nil {
+			return err
+		}
+	} else {
+		s = string(b)
+	}
+	return v.UnmarshalText([]byte(s))
+}
+func (v *flexibleID) UnmarshalText(b []byte) error {
+	n, err := strconv.ParseInt(string(b), 10, 64)
+	if err == nil {
+		*v = flexibleID(n)
+	}
+	return err
+}
+func TestDynamicJSONAndCustomScalars(t *testing.T) {
+	type request struct {
+		ID      flexibleID   `json:"id"`
+		Dynamic any          `json:"dynamic"`
+		IDs     []flexibleID `json:"ids,optional"`
+	}
+	scalar := ScalarOf[flexibleID]("string|int64", "string", true)
+	b, err := New[request](scalar)
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, id := range []string{`"9223372036854775807"`, `9223372036854775807`} {
+		r := httptest.NewRequest("POST", "/", strings.NewReader(`{"id":`+id+`,"dynamic":{"n":9223372036854775807},"ids":["1",2]}`))
+		r.Header.Set("Content-Type", "application/json")
+		var req request
+		if err = b.Bind(r, nil, &req); err != nil {
+			t.Fatal(err)
+		}
+		if req.ID != flexibleID(9223372036854775807) || req.Dynamic.(map[string]any)["n"] != json.Number("9223372036854775807") {
+			t.Fatalf("precision: %+v", req)
+		}
+		encoded, _ := json.Marshal(req)
+		if !strings.Contains(string(encoded), `"id":"9223372036854775807"`) {
+			t.Fatal(string(encoded))
+		}
+	}
+	for _, body := range []string{`{"id":true,"dynamic":null}`, `{"id":1.1,"dynamic":null}`, `{"id":9223372036854775808,"dynamic":null}`, `{"id":1,"dynamic":{"x":1,"x":2}}`, `{"id":1,"dynamic":null,"unexpected":1}`} {
+		r := httptest.NewRequest("POST", "/", strings.NewReader(body))
+		r.Header.Set("Content-Type", "application/json")
+		req := request{ID: 7}
+		if b.Bind(r, nil, &req) == nil || req.ID != 7 {
+			t.Fatalf("accepted or mutated %s", body)
+		}
+	}
+	for _, value := range []string{`null`, `[1,"x"]`, `false`, `"text"`} {
+		r := httptest.NewRequest("POST", "/", strings.NewReader(`{"id":1,"dynamic":`+value+`}`))
+		r.Header.Set("Content-Type", "application/json")
+		if err := b.Bind(r, nil, &request{}); err != nil {
+			t.Fatal(err)
+		}
+	}
+	if _, err := New[request](); err == nil {
+		t.Fatal("implicit custom type registration")
+	}
+	response, err := b.ResponseSchema()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if response.Properties["id"].Type != "string" || response.Properties["ids"].Items.Type != "string" || len(b.BodySchema().Properties["id"].AnyOf) != 2 {
+		t.Fatal("input/output schemas conflated")
+	}
+	type path struct {
+		ID flexibleID `path:"id"`
+	}
+	p, err := New[path](scalar)
+	if err != nil {
+		t.Fatal(err)
+	}
+	var req path
+	if err := p.Bind(httptest.NewRequest("GET", "/", nil), map[string]string{"id": "9223372036854775807"}, &req); err != nil {
+		t.Fatal(err)
+	}
+	if p.Parameters()[0].Schema.Type != "string" {
+		t.Fatal("text parameters need text schema")
+	}
+	if _, err := New[path](ScalarOf[flexibleID]("string|int64", "string", false)); err == nil {
+		t.Fatal("text support not explicit")
+	}
+	schemaOnly, err := Describe(reflect.TypeOf(request{}), scalar)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if schemaOnly.Bind(httptest.NewRequest("POST", "/", nil), nil, &request{}) == nil {
+		t.Fatal("schema-only binder executed")
+	}
+}
+
+func TestScalarPointersCollectionsAndRegistration(t *testing.T) {
+	scalar := ScalarOf[flexibleID]("string|int64", "string", true)
+	type nullable struct {
+		ID     *flexibleID            `json:"id,optional"`
+		Values map[string]*flexibleID `json:"values,optional"`
+	}
+	b, err := New[nullable](scalar)
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, body := range []string{`{}`, `{"id":null}`, `{"id":1,"values":{"a":"2","b":null}}`} {
+		r := httptest.NewRequest("POST", "/", strings.NewReader(body))
+		r.Header.Set("Content-Type", "application/json")
+		if err := b.Bind(r, nil, &nullable{}); err != nil {
+			t.Fatal(err)
+		}
+	}
+	input := b.BodySchema().Properties["id"]
+	if len(input.AnyOf) != 3 || !input.AnyOf[2].Nullable || len(input.AnyOf[2].Enum) != 1 || input.AnyOf[2].Enum[0] != nil {
+		t.Fatal("nullable input union does not describe null")
+	}
+	out, err := b.ResponseSchema()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if out.Properties["id"].Type != "string" || !out.Properties["id"].Nullable {
+		t.Fatal("nullable output type")
+	}
+	type query struct {
+		IDs []flexibleID `form:"ids"`
+	}
+	q, err := New[query](scalar)
+	if err != nil {
+		t.Fatal(err)
+	}
+	var req query
+	if err := q.Bind(httptest.NewRequest("GET", "/?ids=1&ids=2", nil), nil, &req); err != nil || !reflect.DeepEqual(req.IDs, []flexibleID{1, 2}) {
+		t.Fatalf("query scalar collection: %+v %v", req, err)
+	}
+	if q.Parameters()[0].Schema.Items.Type != "string" {
+		t.Fatal("text array schema")
+	}
+	if _, err := New[query](ScalarOf[flexibleID]("string|int64", "string", false)); err == nil {
+		t.Fatal("array bypassed text declaration")
+	}
+	if err := ValidateScalars(ScalarOf[int64]("int64", "string", true)); err == nil {
+		t.Fatal("missing methods accepted")
+	}
+	if err := ValidateScalars(scalar, scalar); err == nil {
+		t.Fatal("duplicate registration")
+	}
+	type strict struct {
+		ID int64 `json:"id"`
+	}
+	strictBinder := MustNew[strict]()
+	r := httptest.NewRequest("POST", "/", strings.NewReader(`{"id":"1"}`))
+	r.Header.Set("Content-Type", "application/json")
+	if strictBinder.Bind(r, nil, &strict{}) == nil {
+		t.Fatal("other binder globally loosened")
+	}
+}
+
+type panicScalar string
+
+func (v panicScalar) MarshalJSON() ([]byte, error) { return json.Marshal(string(v)) }
+func (v *panicScalar) UnmarshalJSON([]byte) error  { panic("decoder failure") }
+func TestScalarPanicIsBindingError(t *testing.T) {
+	type req struct {
+		Value panicScalar `json:"value"`
+	}
+	b := MustNew[req](ScalarOf[panicScalar]("string", "string", false))
+	r := httptest.NewRequest("POST", "/", strings.NewReader(`{"value":"bad"}`))
+	r.Header.Set("Content-Type", "application/json")
+	dst := req{Value: "original"}
+	if err := b.Bind(r, nil, &dst); err == nil || dst.Value != "original" {
+		t.Fatalf("decoder panic: %+v %v", dst, err)
+	}
+}
+
+func TestLimitedJSONTrailingWhitespace(t *testing.T) {
+	type req struct {
+		Value any `json:"value"`
+	}
+	b := MustNew[req]()
+	r := httptest.NewRequest("POST", "/", strings.NewReader(`{"value":null}`+strings.Repeat(" ", 65)))
+	r.Header.Set("Content-Type", "application/json")
+	r.ContentLength = -1
+	r.Body = http.MaxBytesReader(httptest.NewRecorder(), r.Body, 64)
+	err := b.Bind(r, nil, &req{}, 64)
+	if apierrors.From(err).Status != 413 {
+		t.Fatalf("tail limit error: %v", err)
+	}
+}
+
+func TestResponseSchemaPreservesOrdinaryPointerConstraints(t *testing.T) {
+	type dto struct {
+		Count  *int    `json:"count,optional,range=[1:10]"`
+		Choice *string `json:"choice,options=a|b"`
+		Values *[]int  `json:"values,optional" binding:"max=3"`
+	}
+	b := MustNew[dto]()
+	response, err := b.ResponseSchema()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !reflect.DeepEqual(response, b.BodySchema()) {
+		t.Fatalf("changed ordinary response constraints: %#v", response)
+	}
+}

database/README.md

@@ -3,7 +3,7 @@
 `database` 包提供基于标准库 `database/sql` 的连接池生命周期，不绑定 ORM 或驱动：
 
 - `Config` / `ConfigFromEnv`：连接池参数和 `GO_OMNI_DB_*` 环境变量。
-- `Open`：创建连接池、设置连接上限并在返回前执行 `PingContext`。
+- `Open` / `OpenConnector`：通过 DSN 或标准 Connector 创建连接池、设置连接上限并在返回前执行 `PingContext`。
 - `Health`：用于就绪检查，等待连接和 Ping 均受 `PingTimeout` 限制。
 - `InTx`：统一事务提交和回滚；工作函数返回错误或 panic 时回滚。
 - `Close`：由嵌入的 `*sql.DB` 提供，应用退出时显式调用。
@@ -40,7 +40,7 @@ GO_OMNI_DB_CONN_MAX_IDLE_TIME=5m
 GO_OMNI_DB_PING_TIMEOUT=5s
 ```
 
-`DSN` 必填，驱动默认是 `mysql`。数据库建库、迁移、表结构和具体 Repository 属于业务项目或可选模块，不会被核心包自动执行。
+使用 `ConfigFromEnv` / `Open` 时 `DSN` 必填，环境变量入口的驱动默认是 `mysql`。数据库建库、迁移、表结构和具体 Repository 属于业务项目或可选模块，不会被核心包自动执行。
 
 `MaxIdleConns=0` 会禁用空闲连接。初始化 Ping 失败会关闭已创建的连接池。
 
@@ -56,3 +56,69 @@ python3 scripts/verifyDatabase.py --version v0.2.0
 脚本仅操作本次创建的独立容器与数据库，验证 HTTP CRUD、服务重启持久化、事务提交与
 错误/panic/取消回滚、连接池关闭、缺少表结构时启动失败，以及停库后的 readiness 503 和恢复后的 200。
 结束时清理容器、匿名数据卷和临时项目。常规 `go test ./...` 不依赖 Docker。
+
+
+## 项目配置叠加
+
+`database.ApplyEnv(cfg, prefix)` 在已有文件/默认配置上覆盖非空环境变量，保留未覆盖的池参数。
+`Config` 的 JSON/YAML 字段使用 lowerCamelCase，`DSN` 使用 `json:"-"`，连接密钥从环境变量加载。
+API 脚手架 `--database mysql` 使用此流程，并要求正的 `maxOpenConns`，提供数据库 readiness 与幂等清理。
+具体表结构、迁移和 Repository 留在业务项目，参考 `examples/userService`。
+
+## Connector 接入（v0.9.1-preview）
+
+项目已有 `database/sql/driver.Connector` 时使用 `OpenConnector`。这是标准驱动接口，核心包不增加具体驱动依赖。项目可以在同一进程创建多个使用不同证书、日志、拨号策略的连接池。
+
+下面是 MySQL 的完整组装函数；连接地址、凭据、TLS 和驱动 Logger 都从调用方传入，不在框架中约定：
+
+```go
+package connection
+
+import (
+    "context"
+    "crypto/tls"
+    "github.com/go-sql-driver/mysql"
+    "git.yuntuo.hk/k2safe/go-omni/database"
+)
+
+func Open(ctx context.Context, address, user, password, name string,
+    tlsConfig *tls.Config, logger mysql.Logger,
+    pool database.PoolConfig) (*database.DB, error) {
+    cfg := mysql.NewConfig()
+    cfg.Net, cfg.Addr = "tcp", address
+    cfg.User, cfg.Passwd, cfg.DBName = user, password, name
+    cfg.TLS = tlsConfig // 项目设置 RootCAs、ServerName、MinVersion 等
+    if logger != nil {
+        cfg.Logger = logger // 项目现有的 Print(...any) 日志适配器
+    }
+    connector, err := mysql.NewConnector(cfg)
+    if err != nil {
+        return nil, err
+    }
+    return database.OpenConnector(ctx, connector, pool)
+}
+```
+
+调用时以 `database.DefaultPoolConfig()` 为起点，按项目需要调整。已有 `database.Config` 可调用 `.PoolConfig()` 提取池设置；`ConfigFromEnv` / `ApplyEnv` 仍是 DSN 入口，不用为 Connector 填假 DSN。`PoolConfig` 支持通过 `config.DecodeFile` 加载项目的 JSON/YAML 嵌套配置，环境覆盖由项目按自己的驱动配置组织。
+
+| PoolConfig 字段 | 默认值 / 含义 |
+| --- | --- |
+| `MaxOpenConns` | `10`；`0` 表示不限制 |
+| `MaxIdleConns` | `5`；`0` 禁止保留空闲连接 |
+| `ConnMaxLifetime` | `30m`；`0` 不因连接年龄回收 |
+| `ConnMaxIdleTime` | `5m`；`0` 不因空闲时长回收 |
+| `PingTimeout` | `5s`；必须为正，约束启动 Ping 和 Health 等待 |
+
+返回的 `*database.DB` 嵌入 `*sql.DB`，可使用 `QueryContext`、`ExecContext`、`Stats`，以及框架的 `Health`、`InTx`。需要标准数据库指针的 ORM/迁移器可取 `db.DB`；不要重复建立池。项目负责驱动支持的 context 取消与读写超时设置，框架不能强制中断不遵守 context 的自定义驱动。
+
+**生命周期：** nil/带类型的 nil Connector、非法池参数、启动前已取消的 context 会在创建池前返回，Connector 仍归调用方。进入 `sql.OpenDB` 后由池持有；启动 Ping 失败自动关闭，成功后由调用方负责 `db.Close`，通常注册 `app.OnShutdown(db.Close)`。若 Connector 实现 `io.Closer`，遵循标准 `database/sql` 规则随池关闭；有资源的 Connector 不应跨多个池共享。资源初始化过程中、注册退出回调之前若业务校验失败，项目也须关闭池。
+
+`db.PoolConfig()` 返回池配置快照。Connector 入口的 `db.Config()` 中 `Driver` / `DSN` 为空，不能用它重建 Connector。TLS、Logger、驱动版本检查、字符集、时区以及迁移规则保持由项目负责；不写入框架配置快照。
+
+验收脚本使用独立本地 MySQL 8.4 容器（1 CPU / 768 MiB），自动生成测试 CA/证书与随机凭据，检查 TLS 信任/主机名、两池配置隔离、驱动日志、事务和 HTTP 超时，结束后清理本次资源：
+
+```sh
+python3 scripts/verifyConnector.py --local --report performance/connectorLocal.json
+# 发布后通过全新 module cache 验证远程依赖，无本地 replace：
+python3 scripts/verifyConnector.py --version v0.9.1-preview --report performance/connectorRemote.json
+```

database/configOverlay_test.go

@@ -0,0 +1,35 @@
+package database
+
+import (
+	"encoding/json"
+	"strings"
+	"testing"
+	"time"
+)
+
+func TestApplyEnvPreservesFilePoolAndHidesDSN(t *testing.T) {
+	cfg := DefaultConfig()
+	cfg.MaxOpenConns = 3
+	cfg.MaxIdleConns = 1
+	cfg.PingTimeout = time.Second
+	t.Setenv("OMNI_TEST_DSN", "user:secret@tcp(localhost:3306)/test")
+	t.Setenv("OMNI_TEST_MAX_IDLE_CONNS", "0")
+	got, err := ApplyEnv(cfg, "OMNI_TEST_")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if got.MaxOpenConns != 3 || got.MaxIdleConns != 0 || got.PingTimeout != time.Second {
+		t.Fatalf("lost file defaults: %+v", got)
+	}
+	data, err := json.Marshal(got)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if strings.Contains(string(data), "secret") || !strings.Contains(string(data), "maxOpenConns") {
+		t.Fatalf("unsafe config encoding: %s", data)
+	}
+	t.Setenv("OMNI_TEST_MAX_OPEN_CONNS", "bad")
+	if _, err = ApplyEnv(cfg, "OMNI_TEST_"); err == nil {
+		t.Fatal("invalid override accepted")
+	}
+}

database/connector.go

@@ -0,0 +1,82 @@
+package database
+
+import (
+	"context"
+	"database/sql"
+	"database/sql/driver"
+	"errors"
+	"reflect"
+	"time"
+)
+
+// PoolConfig contains only driver-independent settings. Connection credentials,
+// TLS, logging and dial behavior belong to the application's Connector.
+// Start from DefaultPoolConfig; zero PingTimeout is invalid.
+type PoolConfig struct {
+	MaxOpenConns    int           `json:"maxOpenConns"`
+	MaxIdleConns    int           `json:"maxIdleConns"`
+	ConnMaxLifetime time.Duration `json:"connMaxLifetime"`
+	ConnMaxIdleTime time.Duration `json:"connMaxIdleTime"`
+	PingTimeout     time.Duration `json:"pingTimeout"`
+}
+
+func DefaultPoolConfig() PoolConfig {
+	return PoolConfig{MaxOpenConns: 10, MaxIdleConns: 5, ConnMaxLifetime: 30 * time.Minute, ConnMaxIdleTime: 5 * time.Minute, PingTimeout: 5 * time.Second}
+}
+
+func (c PoolConfig) Validate() error {
+	if c.MaxOpenConns < 0 || c.MaxIdleConns < 0 {
+		return errors.New("database pool limits cannot be negative")
+	}
+	if c.MaxOpenConns > 0 && c.MaxIdleConns > c.MaxOpenConns {
+		return errors.New("max idle connections cannot exceed max open connections")
+	}
+	if c.ConnMaxLifetime < 0 || c.ConnMaxIdleTime < 0 || c.PingTimeout <= 0 {
+		return errors.New("database timeouts are invalid")
+	}
+	return nil
+}
+
+func (c PoolConfig) config() Config {
+	return Config{MaxOpenConns: c.MaxOpenConns, MaxIdleConns: c.MaxIdleConns, ConnMaxLifetime: c.ConnMaxLifetime, ConnMaxIdleTime: c.ConnMaxIdleTime, PingTimeout: c.PingTimeout}
+}
+
+// OpenConnector opens an independent pool using the supplied standard Connector.
+// No registered driver name or DSN is required. It applies cfg and completes a
+// startup Ping bounded by ctx and PingTimeout before returning.
+//
+// Validation failures and an already-canceled ctx leave the Connector untouched.
+// Once sql.OpenDB is called, the pool owns its lifecycle: a failed startup closes
+// the pool; on success the caller must Close the returned DB. As in database/sql,
+// this also closes a Connector that implements io.Closer. Use a separate Connector
+// for each pool if it owns resources. Nil ctx means context.Background.
+func OpenConnector(ctx context.Context, connector driver.Connector, cfg PoolConfig) (*DB, error) {
+	if nilConnector(connector) {
+		return nil, errors.New("database connector is required")
+	}
+	if err := cfg.Validate(); err != nil {
+		return nil, err
+	}
+	if ctx == nil {
+		ctx = context.Background()
+	}
+	if err := ctx.Err(); err != nil {
+		return nil, err
+	}
+	return initializePool(ctx, sql.OpenDB(connector), cfg.config())
+}
+
+func nilConnector(connector driver.Connector) bool {
+	if connector == nil {
+		return true
+	}
+	v := reflect.ValueOf(connector)
+	switch v.Kind() {
+	case reflect.Chan, reflect.Func, reflect.Interface, reflect.Map, reflect.Pointer, reflect.Slice:
+		return v.IsNil()
+	}
+	return false
+}
+
+// PoolConfig returns a copy of the settings used to create this pool.
+func (db *DB) PoolConfig() PoolConfig { return db.config.PoolConfig() }

database/connector_test.go

@@ -0,0 +1,336 @@
+package database_test
+
+import (
+	"context"
+	"database/sql"
+	"database/sql/driver"
+	"errors"
+	"io"
+	"sync"
+	"sync/atomic"
+	"testing"
+	"time"
+
+	"git.yuntuo.hk/k2safe/go-omni/database"
+)
+
+type fixtureConnector struct {
+	identity                                                         string
+	connects, closedConnections, closedConnector, commits, rollbacks atomic.Int32
+	connect                                                          func(context.Context) error
+	ping                                                             func(context.Context) error
+	query                                                            func(context.Context) error
+	closeErr                                                         error
+}
+
+func (c *fixtureConnector) Connect(ctx context.Context) (driver.Conn, error) {
+	c.connects.Add(1)
+	if c.connect != nil {
+		if err := c.connect(ctx); err != nil {
+			return nil, err
+		}
+	}
+	return &fixtureConn{owner: c}, nil
+}
+func (c *fixtureConnector) Driver() driver.Driver { return fixtureDriver{} }
+func (c *fixtureConnector) Close() error          { c.closedConnector.Add(1); return c.closeErr }
+
+type fixtureDriver struct{}
+
+func (fixtureDriver) Open(string) (driver.Conn, error) {
+	return nil, errors.New("unexpected driver name/DSN path")
+}
+
+type fixtureConn struct{ owner *fixtureConnector }
+
+func (c *fixtureConn) Prepare(string) (driver.Stmt, error) { return nil, errors.New("not used") }
+func (c *fixtureConn) Close() error                        { c.owner.closedConnections.Add(1); return nil }
+func (c *fixtureConn) Begin() (driver.Tx, error)           { return fixtureTx{c.owner}, nil }
+func (c *fixtureConn) Ping(ctx context.Context) error {
+	if c.owner.ping != nil {
+		return c.owner.ping(ctx)
+	}
+	return nil
+}
+func (c *fixtureConn) QueryContext(ctx context.Context, _ string, _ []driver.NamedValue) (driver.Rows, error) {
+	if c.owner.query != nil {
+		if err := c.owner.query(ctx); err != nil {
+			return nil, err
+		}
+	}
+	return &fixtureRows{identity: c.owner.identity}, nil
+}
+
+type fixtureTx struct{ owner *fixtureConnector }
+
+func (tx fixtureTx) Commit() error   { tx.owner.commits.Add(1); return nil }
+func (tx fixtureTx) Rollback() error { tx.owner.rollbacks.Add(1); return nil }
+
+type fixtureRows struct {
+	identity string
+	sent     bool
+}
+
+func (r *fixtureRows) Columns() []string { return []string{"identity"} }
+func (r *fixtureRows) Close() error      { return nil }
+func (r *fixtureRows) Next(values []driver.Value) error {
+	if r.sent {
+		return io.EOF
+	}
+	r.sent = true
+	values[0] = r.identity
+	return nil
+}
+
+func TestConnectorIndependentPoolsAndContext(t *testing.T) {
+	type key struct{}
+	ctx := context.WithValue(context.Background(), key{}, "startup")
+	cfg := database.DefaultPoolConfig()
+	cfg.MaxOpenConns = 2
+	cfg.MaxIdleConns = 2
+	var owners []*fixtureConnector
+	var pools []*database.DB
+	for _, identity := range []string{"alpha", "beta"} {
+		owner := &fixtureConnector{identity: identity}
+		// Startup Connect/Ping and each query preserve their caller context.
+		// database/sql may also open replacement connections in the background.
+		owner.connect = func(ctx context.Context) error {
+			if owner.connects.Load() == 1 && ctx.Value(key{}) != "startup" {
+				return errors.New("lost request context")
+			}
+			return nil
+		}
+		owner.ping = func(ctx context.Context) error {
+			if ctx.Value(key{}) != "startup" {
+				return errors.New("lost ping context")
+			}
+			return nil
+		}
+		owner.query = func(ctx context.Context) error {
+			if ctx.Value(key{}) != "startup" {
+				return errors.New("lost query context")
+			}
+			return nil
+		}
+		pool, err := database.OpenConnector(ctx, owner, cfg)
+		if err != nil {
+			t.Fatal(err)
+		}
+		t.Cleanup(func() { pool.Close() })
+		if pool.PoolConfig() != cfg || pool.Config().Driver != "" || pool.Config().DSN != "" || pool.Stats().MaxOpenConnections != 2 {
+			t.Fatal("pool settings or DSN boundary")
+		}
+		owners = append(owners, owner)
+		pools = append(pools, pool)
+	}
+	var wg sync.WaitGroup
+	for i, pool := range pools {
+		for n := 0; n < 16; n++ {
+			wg.Add(1)
+			go func(i int, pool *database.DB) {
+				defer wg.Done()
+				var identity string
+				if err := pool.QueryRowContext(ctx, "identity").Scan(&identity); err != nil {
+					t.Error(err)
+				} else if identity != owners[i].identity {
+					t.Error("crossed connectors")
+				}
+			}(i, pool)
+		}
+	}
+	wg.Wait()
+	for i, pool := range pools {
+		if pool.Stats().OpenConnections > cfg.MaxOpenConns {
+			t.Fatal("pool cap not applied")
+		}
+		if err := pool.Close(); err != nil {
+			t.Fatal(err)
+		}
+		if err := pool.Close(); err != nil {
+			t.Fatal(err)
+		}
+		if owners[i].closedConnector.Load() != 1 || owners[i].closedConnections.Load() != owners[i].connects.Load() {
+			t.Fatal("close did not release owned resources exactly once")
+		}
+		if pool.Health(ctx) == nil {
+			t.Fatal("closed pool is healthy")
+		}
+	}
+}
+
+func TestConnectorRejectsInvalidInputWithoutTakingOwnership(t *testing.T) {
+	var typedNil *fixtureConnector
+	for _, connector := range []driver.Connector{nil, typedNil} {
+		if db, err := database.OpenConnector(nil, connector, database.DefaultPoolConfig()); err == nil || db != nil {
+			t.Fatal("nil connector accepted")
+		}
+	}
+	for _, mutate := range []func(*database.PoolConfig){
+		func(c *database.PoolConfig) { c.MaxOpenConns = -1 }, func(c *database.PoolConfig) { c.MaxIdleConns = -1 },
+		func(c *database.PoolConfig) { c.MaxIdleConns = c.MaxOpenConns + 1 }, func(c *database.PoolConfig) { c.PingTimeout = 0 },
+		func(c *database.PoolConfig) { c.ConnMaxLifetime = -1 }, func(c *database.PoolConfig) { c.ConnMaxIdleTime = -1 },
+	} {
+		cfg := database.DefaultPoolConfig()
+		mutate(&cfg)
+		owner := &fixtureConnector{}
+		if db, err := database.OpenConnector(nil, owner, cfg); err == nil || db != nil {
+			t.Fatal("invalid config accepted")
+		}
+		if owner.connects.Load() != 0 || owner.closedConnector.Load() != 0 {
+			t.Fatal("validation consumed connector")
+		}
+	}
+	owner := &fixtureConnector{}
+	ctx, cancel := context.WithCancel(context.Background())
+	cancel()
+	if db, err := database.OpenConnector(ctx, owner, database.DefaultPoolConfig()); !errors.Is(err, context.Canceled) || db != nil {
+		t.Fatalf("pre-canceled context: %v", err)
+	}
+	if owner.connects.Load() != 0 || owner.closedConnector.Load() != 0 {
+		t.Fatal("pre-cancellation consumed connector")
+	}
+	if err := database.DefaultConfig().Validate(); err == nil {
+		t.Fatal("legacy DSN requirements changed")
+	}
+}
+
+func TestConnectorStartupFailuresReleaseResources(t *testing.T) {
+	failure := errors.New("fixture unavailable")
+	closeFailure := errors.New("fixture close failed")
+	for _, phase := range []string{"connect", "ping"} {
+		t.Run(phase, func(t *testing.T) {
+			owner := &fixtureConnector{closeErr: closeFailure}
+			if phase == "connect" {
+				owner.connect = func(context.Context) error { return failure }
+			} else {
+				owner.ping = func(context.Context) error { return failure }
+			}
+			pool, err := database.OpenConnector(nil, owner, database.DefaultPoolConfig())
+			if pool != nil || !errors.Is(err, failure) || !errors.Is(err, closeFailure) {
+				t.Fatalf("lost failure or cleanup error: %v", err)
+			}
+			expectedConnections := int32(0)
+			if phase == "ping" {
+				expectedConnections = 1
+			}
+			if owner.closedConnector.Load() != 1 || owner.closedConnections.Load() != expectedConnections {
+				t.Fatal("startup failure leaked resources")
+			}
+		})
+	}
+}
+
+func TestConnectorTimeoutBoundsConnectAndPing(t *testing.T) {
+	for _, phase := range []string{"connect", "ping"} {
+		t.Run(phase, func(t *testing.T) {
+			owner := &fixtureConnector{}
+			cfg := database.DefaultPoolConfig()
+			cfg.PingTimeout = 20 * time.Millisecond
+			wait := func(ctx context.Context) error {
+				if _, ok := ctx.Deadline(); !ok {
+					return errors.New("missing deadline")
+				}
+				<-ctx.Done()
+				return ctx.Err()
+			}
+			if phase == "connect" {
+				owner.connect = wait
+			} else {
+				owner.ping = wait
+			}
+			pool, err := database.OpenConnector(context.Background(), owner, cfg)
+			if pool != nil || !errors.Is(err, context.DeadlineExceeded) {
+				t.Fatalf("%s timeout: %v", phase, err)
+			}
+			if owner.closedConnector.Load() != 1 {
+				t.Fatal("timeout leaked connector")
+			}
+		})
+	}
+}
+
+func TestConnectorHealthBoundsPoolWaitAndRecovers(t *testing.T) {
+	cfg := database.DefaultPoolConfig()
+	cfg.MaxOpenConns = 1
+	cfg.MaxIdleConns = 1
+	cfg.PingTimeout = 20 * time.Millisecond
+	owner := &fixtureConnector{}
+	pool, err := database.OpenConnector(nil, owner, cfg)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer pool.Close()
+	conn, err := pool.Conn(context.Background())
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer conn.Close()
+	if err = pool.Health(nil); !errors.Is(err, context.DeadlineExceeded) {
+		t.Fatalf("waiting for busy pool was not bounded: %v", err)
+	}
+	if err = conn.Close(); err != nil {
+		t.Fatal(err)
+	}
+	if err = pool.Health(nil); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestConnectorIdleZeroAndLifetime(t *testing.T) {
+	for _, mode := range []string{"noIdle", "expired"} {
+		t.Run(mode, func(t *testing.T) {
+			cfg := database.DefaultPoolConfig()
+			if mode == "noIdle" {
+				cfg.MaxIdleConns = 0
+			} else {
+				cfg.ConnMaxLifetime = time.Nanosecond
+			}
+			owner := &fixtureConnector{}
+			pool, err := database.OpenConnector(nil, owner, cfg)
+			if err != nil {
+				t.Fatal(err)
+			}
+			defer pool.Close()
+			if err = pool.Health(nil); err != nil {
+				t.Fatal(err)
+			}
+			if owner.connects.Load() < 2 || owner.closedConnections.Load() == 0 {
+				t.Fatal("pool did not retire connections")
+			}
+			if mode == "noIdle" && pool.Stats().Idle != 0 {
+				t.Fatal("zero idle not honored")
+			}
+			if mode == "expired" && pool.Stats().MaxLifetimeClosed == 0 {
+				t.Fatal("lifetime not honored")
+			}
+		})
+	}
+}
+
+func TestConnectorTransactionsKeepCommitAndRollbackSemantics(t *testing.T) {
+	owner := &fixtureConnector{}
+	pool, err := database.OpenConnector(nil, owner, database.DefaultPoolConfig())
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer pool.Close()
+	ctx := context.Background()
+	if err = pool.InTx(ctx, nil, func(*sql.Tx) error { return nil }); err != nil {
+		t.Fatal(err)
+	}
+	failed := errors.New("business failed")
+	if err = pool.InTx(ctx, nil, func(*sql.Tx) error { return failed }); !errors.Is(err, failed) {
+		t.Fatal(err)
+	}
+	func() {
+		defer func() {
+			if recover() != failed {
+				t.Error("panic not preserved")
+			}
+		}()
+		_ = pool.InTx(ctx, nil, func(*sql.Tx) error { panic(failed) })
+	}()
+	if owner.commits.Load() != 1 || owner.rollbacks.Load() != 2 {
+		t.Fatal("transaction semantics changed")
+	}
+}

database/database.go

@@ -14,37 +14,47 @@ import (
 )
 
 type Config struct {
-	Driver          string
-	DSN             string
-	MaxOpenConns    int
-	MaxIdleConns    int
-	ConnMaxLifetime time.Duration
-	ConnMaxIdleTime time.Duration
-	PingTimeout     time.Duration
+	Driver          string        `json:"driver"`
+	DSN             string        `json:"-"`
+	MaxOpenConns    int           `json:"maxOpenConns"`
+	MaxIdleConns    int           `json:"maxIdleConns"`
+	ConnMaxLifetime time.Duration `json:"connMaxLifetime"`
+	ConnMaxIdleTime time.Duration `json:"connMaxIdleTime"`
+	PingTimeout     time.Duration `json:"pingTimeout"`
 }
 
-func DefaultConfig() Config {
-	return Config{
-		MaxOpenConns:    10,
-		MaxIdleConns:    5,
-		ConnMaxLifetime: 30 * time.Minute,
-		ConnMaxIdleTime: 5 * time.Minute,
-		PingTimeout:     5 * time.Second,
+func DefaultConfig() Config { return DefaultPoolConfig().config() }
+
+// PoolConfig returns driver-independent connection pool settings.
+func (c Config) PoolConfig() PoolConfig {
+	return PoolConfig{
+		MaxOpenConns: c.MaxOpenConns, MaxIdleConns: c.MaxIdleConns,
+		ConnMaxLifetime: c.ConnMaxLifetime, ConnMaxIdleTime: c.ConnMaxIdleTime,
+		PingTimeout: c.PingTimeout,
 	}
 }
 
 // ConfigFromEnv reads GO_OMNI_DB_* style settings. DSN is required.
 func ConfigFromEnv(prefix string) (Config, error) {
+	return ApplyEnv(DefaultConfig(), prefix)
+}
+
+// ApplyEnv overlays nonempty environment settings on file/default configuration.
+// DSN is environment-only when Config is decoded from JSON or YAML.
+func ApplyEnv(cfg Config, prefix string) (Config, error) {
 	prefix = strings.TrimSpace(prefix)
 	if prefix == "" {
 		prefix = "GO_OMNI_DB_"
 	}
-	cfg := DefaultConfig()
-	cfg.Driver = strings.TrimSpace(os.Getenv(prefix + "DRIVER"))
+	if value := strings.TrimSpace(os.Getenv(prefix + "DRIVER")); value != "" {
+		cfg.Driver = value
+	}
 	if cfg.Driver == "" {
 		cfg.Driver = "mysql"
 	}
-	cfg.DSN = strings.TrimSpace(os.Getenv(prefix + "DSN"))
+	if value := strings.TrimSpace(os.Getenv(prefix + "DSN")); value != "" {
+		cfg.DSN = value
+	}
 	if cfg.DSN == "" {
 		return Config{}, fmt.Errorf("%sDSN is required", prefix)
 	}
@@ -74,16 +84,7 @@ func (c Config) Validate() error {
 	if strings.TrimSpace(c.DSN) == "" {
 		return errors.New("database DSN is required")
 	}
-	if c.MaxOpenConns < 0 || c.MaxIdleConns < 0 {
-		return errors.New("database pool limits cannot be negative")
-	}
-	if c.MaxIdleConns > c.MaxOpenConns && c.MaxOpenConns > 0 {
-		return errors.New("max idle connections cannot exceed max open connections")
-	}
-	if c.ConnMaxLifetime < 0 || c.ConnMaxIdleTime < 0 || c.PingTimeout <= 0 {
-		return errors.New("database timeouts are invalid")
-	}
-	return nil
+	return c.PoolConfig().Validate()
 }
 
 // DB owns a connection pool and exposes the embedded database/sql methods.
@@ -103,23 +104,30 @@ func Open(ctx context.Context, cfg Config) (*DB, error) {
 	if err != nil {
 		return nil, fmt.Errorf("open database: %w", err)
 	}
-	if cfg.MaxOpenConns > 0 {
-		db.SetMaxOpenConns(cfg.MaxOpenConns)
-	}
-	// database/sql uses zero to disable idle connections; do not leave its
-	// default pool size in place when the caller explicitly chooses zero.
-	db.SetMaxIdleConns(cfg.MaxIdleConns)
+	return initializePool(ctx, db, cfg)
+}
+
+// initializePool is the shared ownership boundary for both creation paths.
+// All configuration is validated before creating the sql.DB.
+func initializePool(ctx context.Context, db *sql.DB, cfg Config) (*DB, error) {
+	db.SetMaxOpenConns(cfg.MaxOpenConns)
+	db.SetMaxIdleConns(cfg.MaxIdleConns) // Zero explicitly disables idle connections.
 	db.SetConnMaxLifetime(cfg.ConnMaxLifetime)
 	db.SetConnMaxIdleTime(cfg.ConnMaxIdleTime)
 	checkCtx, cancel := context.WithTimeout(ctx, cfg.PingTimeout)
 	defer cancel()
 	if err := db.PingContext(checkCtx); err != nil {
-		_ = db.Close()
-		return nil, fmt.Errorf("ping database: %w", err)
+		pingErr := fmt.Errorf("ping database: %w", err)
+		if closeErr := db.Close(); closeErr != nil {
+			return nil, errors.Join(pingErr, fmt.Errorf("close database after failed ping: %w", closeErr))
+		}
+		return nil, pingErr
 	}
 	return &DB{DB: db, config: cfg}, nil
 }
 
+// Config returns the original DSN configuration. Pools opened with a Connector
+// have empty Driver/DSN fields; their connector cannot be reconstructed from Config.
 func (db *DB) Config() Config { return db.config }
 
 func (db *DB) Health(ctx context.Context) error {

database/mysqlConnector_test.go

@@ -0,0 +1,180 @@
+package database_test
+
+import (
+	"context"
+	"crypto/tls"
+	"crypto/x509"
+	"database/sql"
+	"errors"
+	"net"
+	"os"
+	"sync/atomic"
+	"testing"
+	"time"
+
+	"git.yuntuo.hk/k2safe/go-omni/database"
+	"github.com/go-sql-driver/mysql"
+)
+
+type connectorDriverLog struct{ count atomic.Int32 }
+
+func (l *connectorDriverLog) Print(...any) { l.count.Add(1) }
+
+func TestMySQLConnectorDriverLoggerIsolation(t *testing.T) {
+	listener, err := net.Listen("tcp", "127.0.0.1:0")
+	if err != nil {
+		t.Fatal(err)
+	}
+	stopped := make(chan struct{})
+	go func() {
+		defer close(stopped)
+		for {
+			c, err := listener.Accept()
+			if err != nil {
+				return
+			}
+			c.Close()
+		}
+	}()
+	defer func() { listener.Close(); <-stopped }()
+	logs := [2]connectorDriverLog{}
+	for i := range logs {
+		cfg := mysql.NewConfig()
+		cfg.Net = "tcp"
+		cfg.Addr = listener.Addr().String()
+		cfg.Timeout = time.Second
+		cfg.ReadTimeout = time.Second
+		cfg.Logger = &logs[i]
+		connector, err := mysql.NewConnector(cfg)
+		if err != nil {
+			t.Fatal(err)
+		}
+		before := [2]int32{logs[0].count.Load(), logs[1].count.Load()}
+		db, err := database.OpenConnector(context.Background(), connector, database.DefaultPoolConfig())
+		if err == nil {
+			db.Close()
+			t.Fatal("handshake to closed socket succeeded")
+		}
+		if logs[i].count.Load() <= before[i] || logs[1-i].count.Load() != before[1-i] {
+			t.Fatal("driver logger did not stay on its connector")
+		}
+	}
+}
+
+func TestMySQLConnectorTLSAndPoolIsolation(t *testing.T) {
+	if os.Getenv("GO_OMNI_CONNECTOR_MYSQL_TEST") != "1" {
+		t.Skip("use scripts/verifyConnector.py for isolated MySQL TLS verification")
+	}
+	ctx, cancel := context.WithTimeout(context.Background(), 20*time.Second)
+	defer cancel()
+	ca, err := os.ReadFile(os.Getenv("GO_OMNI_CONNECTOR_CA_FILE"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	roots := x509.NewCertPool()
+	if !roots.AppendCertsFromPEM(ca) {
+		t.Fatal("invalid test CA")
+	}
+	cfg := mysql.NewConfig()
+	cfg.Net = "tcp"
+	cfg.Addr = os.Getenv("GO_OMNI_CONNECTOR_ADDR")
+	cfg.User = os.Getenv("GO_OMNI_CONNECTOR_USER")
+	cfg.Passwd = os.Getenv("GO_OMNI_CONNECTOR_PASSWORD")
+	cfg.DBName = os.Getenv("GO_OMNI_CONNECTOR_DATABASE")
+	cfg.Timeout = time.Second
+	cfg.ReadTimeout = 2 * time.Second
+	cfg.WriteTimeout = 2 * time.Second
+	cfg.TLS = &tls.Config{MinVersion: tls.VersionTLS12, ServerName: "localhost", RootCAs: roots}
+	pool := database.DefaultPoolConfig()
+	pool.MaxOpenConns = 2
+	pool.MaxIdleConns = 2
+	pool.PingTimeout = 2 * time.Second
+	open := func(cfg *mysql.Config) (*database.DB, error) {
+		connector, err := mysql.NewConnector(cfg)
+		if err != nil {
+			return nil, err
+		}
+		return database.OpenConnector(ctx, connector, pool)
+	}
+	cfg.Params = map[string]string{"time_zone": "'+00:00'"}
+	first, err := open(cfg)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer first.Close()
+	other := cfg.Clone()
+	other.Params["time_zone"] = "'+08:00'"
+	second, err := open(other)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer second.Close()
+	for i, db := range []*database.DB{first, second} {
+		var name, cipher, zone string
+		if err := db.QueryRowContext(ctx, "SHOW SESSION STATUS LIKE 'Ssl_cipher'").Scan(&name, &cipher); err != nil {
+			t.Fatal(err)
+		}
+		if cipher == "" {
+			t.Fatal("connection is not encrypted")
+		}
+		if err := db.QueryRowContext(ctx, "SELECT @@session.time_zone").Scan(&zone); err != nil {
+			t.Fatal(err)
+		}
+		if zone != []string{"+00:00", "+08:00"}[i] {
+			t.Fatalf("session config leaked: %s", zone)
+		}
+		if db.Stats().MaxOpenConnections != 2 {
+			t.Fatal("pool configuration ignored")
+		}
+	}
+	for _, bad := range []string{"untrustedCA", "wrongHostname"} {
+		t.Run(bad, func(t *testing.T) {
+			invalid := cfg.Clone()
+			if bad == "untrustedCA" {
+				invalid.TLS.RootCAs = x509.NewCertPool()
+			} else {
+				invalid.TLS.ServerName = "wrong.invalid"
+			}
+			db, err := open(invalid)
+			if err == nil {
+				db.Close()
+				t.Fatal("invalid server certificate accepted")
+			}
+			var verification *tls.CertificateVerificationError
+			if !errors.As(err, &verification) {
+				t.Fatalf("not a TLS verification failure: %v", err)
+			}
+			if err := first.Health(ctx); err != nil {
+				t.Fatalf("failed connector affected existing pool: %v", err)
+			}
+		})
+	}
+	if _, err := first.ExecContext(ctx, "CREATE TABLE connector_check (id INT PRIMARY KEY)"); err != nil {
+		t.Fatal(err)
+	}
+	if err := first.InTx(ctx, nil, func(tx *sql.Tx) error {
+		_, err := tx.ExecContext(ctx, "INSERT INTO connector_check VALUES (1)")
+		return err
+	}); err != nil {
+		t.Fatal(err)
+	}
+	rollbackErr := errors.New("rollback requested")
+	if err := first.InTx(ctx, nil, func(tx *sql.Tx) error {
+		if _, err := tx.ExecContext(ctx, "INSERT INTO connector_check VALUES (2)"); err != nil {
+			return err
+		}
+		return rollbackErr
+	}); !errors.Is(err, rollbackErr) {
+		t.Fatal(err)
+	}
+	var count int
+	if err := second.QueryRowContext(ctx, "SELECT COUNT(*) FROM connector_check").Scan(&count); err != nil || count != 1 {
+		t.Fatalf("transaction count=%d err=%v", count, err)
+	}
+	if err := first.Close(); err != nil {
+		t.Fatal(err)
+	}
+	if err := second.Health(ctx); err != nil {
+		t.Fatal("closing first pool affected second:", err)
+	}
+}

examples/compatibility/ids/id.go

@@ -0,0 +1,29 @@
+// Package ids demonstrates an application-owned scalar. The framework does not
+// impose this ID policy on any other type or project.
+package ids
+
+import (
+	"encoding/json"
+	"strconv"
+)
+
+type ID int64
+
+func (id ID) MarshalJSON() ([]byte, error) { return json.Marshal(strconv.FormatInt(int64(id), 10)) }
+func (id *ID) UnmarshalJSON(raw []byte) error {
+	value := string(raw)
+	if len(raw) > 0 && raw[0] == '"' {
+		if err := json.Unmarshal(raw, &value); err != nil {
+			return err
+		}
+	}
+	return id.UnmarshalText([]byte(value))
+}
+func (id *ID) UnmarshalText(raw []byte) error {
+	value, err := strconv.ParseInt(string(raw), 10, 64)
+	if err != nil {
+		return err
+	}
+	*id = ID(value)
+	return nil
+}

examples/compatibility/main.go

@@ -0,0 +1,75 @@
+// This example only uses local HTTP and bounded streaming; it has no database.
+package main
+
+import (
+	"io"
+	"log"
+	"net/http"
+	"strings"
+
+	omni "git.yuntuo.hk/k2safe/go-omni"
+	"git.yuntuo.hk/k2safe/go-omni/contract"
+	"git.yuntuo.hk/k2safe/go-omni/examples/compatibility/ids"
+	"git.yuntuo.hk/k2safe/go-omni/httpx"
+)
+
+type echoRequest struct {
+	ID   ids.ID `json:"id"`
+	Data any    `json:"data"`
+}
+
+func main() {
+	app := omni.New(omni.WithLogger(true))
+	defer app.Close()
+	app.Use(httpx.WrapMiddleware(func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			w.Header().Set("X-Example", "compatibility")
+			next.ServeHTTP(w, r)
+		})
+	}))
+	app.GET("/legacy", httpx.WrapHandler(http.HandlerFunc(http.NotFound)))
+	binder := contract.MustNew[echoRequest](contract.ScalarOf[ids.ID]("string|int64", "string", true))
+	app.POST("/echo", func(c *httpx.Context) error {
+		var req echoRequest
+		if err := binder.Bind(c.Request(), nil, &req); err != nil {
+			return err
+		}
+		return c.OK(req)
+	})
+	app.HandleWithBodyLimit("POST", "/upload", 10<<20, nil, func(c *httpx.Context) error {
+		reader, err := c.Request().MultipartReader()
+		if err != nil {
+			return omni.BadRequest("INVALID_MULTIPART", "multipart body required")
+		}
+		var total int64
+		for {
+			part, err := reader.NextPart()
+			if err == io.EOF {
+				break
+			}
+			if err != nil {
+				return err
+			}
+			// Replace io.Discard with a streaming storage writer. Do not trust file names
+			// as filesystem paths. io.Copy never buffers the complete uploaded file.
+			n, copyErr := io.Copy(io.Discard, part)
+			closeErr := part.Close()
+			if copyErr != nil {
+				return copyErr
+			}
+			if closeErr != nil {
+				return closeErr
+			}
+			total += n
+		}
+		return c.OK(map[string]int64{"bytes": total})
+	})
+	app.GET("/download", httpx.WrapHandler(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/octet-stream")
+		w.Header().Set("Content-Disposition", `attachment; filename="example.txt"`)
+		_, _ = io.Copy(w, strings.NewReader("A standard Handler keeps its original download response.\n"))
+	})))
+	if err := app.Run("127.0.0.1:8080"); err != nil {
+		log.Fatal(err)
+	}
+}

examples/contracts/README.md

@@ -0,0 +1,15 @@
+# 接口定义示例
+
+`user.api` 是入口，导入 `shared.api`。包含 JSON/path/query/header 混合请求、分页与重复 query 参数、嵌套对象、optional 指针、user 与 admin/user 分组以及 Auth/Audit 命名中间件。
+
+在 go-omni 根目录执行：
+
+```sh
+go run ./cmd/go-omni api validate --api examples/contracts/user.api
+go run ./cmd/go-omni api generate --api examples/contracts/user.api \
+  --dir ../userService --module example.com/userService --framework-dir .
+```
+
+项目中补充 `internal/service` 的业务实现和 `internal/middleware` 的 Auth/Audit hook，再启动服务。初始占位实现返回 501。
+
+需要立即能返回成功结果的最小项目，用 `go-omni api new` 创建问候示例。完整语法、目录、更新策略见 [API.md](../../API.md)。

examples/contracts/compatibility.api

@@ -0,0 +1,64 @@
+syntax = "v1"
+
+scalar BusinessID (
+ goImport: "git.yuntuo.hk/k2safe/go-omni/examples/compatibility/ids"
+ goType: ID
+ jsonInput: string | int64
+ jsonOutput: string
+ text: true
+)
+
+type EchoReq {
+ ID BusinessID `json:"id"`
+ Data any `json:"data"`
+ Legacy interface{} `json:"legacy,optional"`
+}
+type EchoResp {
+ ID BusinessID `json:"id"`
+ Data any `json:"data"`
+}
+type ItemReq {
+ ID BusinessID `path:"id"`
+}
+type CustomReq {
+ Value string `json:"value"`
+}
+type CustomResp {
+ Value string `json:"value"`
+}
+
+@server (group: demo)
+service compatibility-api {
+ @body (maxBytes: 2097152)
+ @handler echo
+ post /echo (EchoReq) returns (EchoResp)
+
+ @handler item
+ get /items/:id (ItemReq) returns (EchoResp)
+
+ @binding custom
+ @body (maxBytes: 512)
+ @handler custom
+ post /custom (CustomReq) returns (CustomResp)
+
+ @handlerMode manual
+ @body (mode: multipart
+ maxBytes: 65536)
+ @handler upload
+ post /upload
+
+ @handlerMode manual
+ @body (mode: raw
+ maxBytes: 128)
+ @produces "text/plain"
+ @handler callback
+ post /callback
+}
+
+@server (group: files)
+service compatibility-api {
+ @handlerMode manual
+ @produces "application/octet-stream"
+ @handler download
+ get /download
+}

examples/contracts/responses.api

@@ -0,0 +1,58 @@
+syntax = "v1"
+
+info (
+ title: "Configurable response example"
+ version: "1.0.0"
+)
+
+// Define the public body once. No field names are required by the framework.
+response CommonResponse (
+ body: {
+  "code": "${code}",
+  "msg": "${message}",
+  "data": "${data}"
+ }
+ codeType: int32
+ successCode: 200
+ errorCode: 9999
+ successMessage: "操作成功"
+ dataMode: always
+ codes: {"ITEM_NOT_FOUND":404001}
+ messages: {"ITEM_NOT_FOUND":"记录不存在"}
+)
+
+response PartnerResponse (
+ body: {"accepted":"${ok}","payload":"${data}","meta":{"trace":"${requestId}"}}
+ errorBody: {"accepted":"${ok}","error":{"reason":"${message}"}}
+)
+
+error ItemNotFound 404 "ITEM_NOT_FOUND" "item not found"
+
+type ItemReq {
+ ItemID int64 `path:"itemId" binding:"min=1"`
+}
+
+type ItemResp {
+ ItemID int64 `json:"itemId"`
+ Name string `json:"name"`
+}
+
+@server (
+ group: items
+ prefix: /api
+ response: CommonResponse
+)
+service response-api {
+ @errors ItemNotFound
+ @handler getItem
+ get /items/:itemId (ItemReq) returns (ItemResp)
+
+ // Success is the ItemResp object itself; errors still use CommonResponse.
+ @response raw
+ @handler rawItem
+ get /rawItems/:itemId (ItemReq) returns (ItemResp)
+
+ @response PartnerResponse
+ @handler partnerItem
+ get /partnerItems/:itemId (ItemReq) returns (ItemResp)
+}

examples/contracts/shared.api

@@ -0,0 +1,11 @@
+syntax = "v1"
+
+type Address {
+    City string `json:"city" binding:"required,max=50"`
+}
+
+type UserResp {
+    UserID int64 `json:"userId"`
+    Name string `json:"name"`
+    Active bool `json:"active"`
+}

examples/contracts/user.api

@@ -0,0 +1,58 @@
+syntax = "v1"
+
+info (
+    title: "User API"
+    version: "1.0.0"
+)
+
+import "shared.api"
+
+type (
+    UpdateUserReq {
+        UserID int64 `path:"userId,range=[1:1000000]"`
+        Notify bool `form:"notify,default=false"`
+        Client string `header:"X-Client,optional"`
+        Name string `json:"name" binding:"required,max=50"`
+        Active bool `json:"active"`
+        Age *int `json:"age,optional,range=[0:150]"`
+        Address *Address `json:"address,optional"`
+    }
+    ListUsersReq {
+        Page int `form:"page,default=1,range=[1:1000]"`
+        PageSize int `form:"pageSize,default=20,range=[1:100]"`
+        Tags []string `form:"tag,optional" binding:"max=10"`
+    }
+    ListUsersResp {
+        Items []UserResp `json:"items"`
+        Page int `json:"page"`
+        Total int64 `json:"total"`
+    }
+    DeleteUserReq {
+        UserID int64 `path:"userId,range=[1:1000000]"`
+    }
+)
+
+@server (
+    group: user
+    prefix: /api/v1
+)
+service user-api {
+    @doc "Update a user"
+    @handler updateUser
+    put /users/:userId (UpdateUserReq) returns (UserResp)
+
+    @doc "List users"
+    @handler listUsers
+    get /users (ListUsersReq) returns (ListUsersResp)
+}
+
+@server (
+    group: admin/user
+    prefix: /admin/v1
+    middleware: Auth,Audit
+)
+service user-api {
+    @doc "Delete a user; business-owned authentication and auditing required"
+    @handler deleteUser
+    delete /users/:userId (DeleteUserReq)
+}

examples/userService/.gitignore

@@ -0,0 +1,6 @@
+/server
+/var/
+.env
+.env.*
+!.env.example
+/.goOmni/api.lock

examples/userService/.goOmni/apiManifest.json

@@ -0,0 +1,21 @@
+{
+  "profile": {
+    "database": "mysql",
+    "storage": "local",
+    "logOutput": "file",
+    "logFormat": "json"
+  },
+  "version": 1,
+  "module": "example.com/userService",
+  "entry": "api/user.api",
+  "generated": {
+    "docs/openapi.json": "05bce8951699350cc1ebca5a626c39349395dd09e395b41560c129e530583204",
+    "internal/apierrors/errorsGen.go": "20e94bbc90ae9f4330de4c25b9a550026c4c352502719a643ede3e8912a6566e",
+    "internal/handler/openapiGen.go": "e4130f5c7494f7db4830bfef203fa8154a9cd087c95954f64c29d74693ead433",
+    "internal/handler/responseGen.go": "d742efc2a3d1d168fae7849e905297bd440c3d6b3802b6150f494c07e6097f4f",
+    "internal/handler/routesGen.go": "4e0c6879cea40e9c0155439fa1fce2cd19b5f83ea6e304523c41f8dc9c3a28e0",
+    "internal/handler/user/handlersGen.go": "1808afc8e4e8ca9785a8552eff64fad39bd5fe4e6e92971f35afc9006e23d76e",
+    "internal/middleware/registryGen.go": "a6122a5453dedc6a4415860108814c50e155128cfe5412b39dd33ce2d01b4b00",
+    "internal/types/typesGen.go": "3ab2ce9ffe467c3ea53ac3d1fec283ecebc87cef57fd592d08dca991fd964876"
+  }
+}

examples/userService/README.md

@@ -0,0 +1,82 @@
+# API 驱动的用户管理示例
+
+这个独立 Go module 从 `api/user.api` 生成，随后在开发者拥有的文件中实现业务。
+使用 MySQL 持久化、事务审计、环境变量 Token 鉴权、文件日志和 local 存储；业务层只接收标准 context 和基础模块接口。
+
+## 启动
+
+先准备空的业务数据库，再设置环境变量（替换占位值，密钥不写进配置或 Git）：
+
+```sh
+export GO_OMNI_DB_DSN='user:password@tcp(127.0.0.1:3306)/user_service?parseTime=true'
+export USER_SERVICE_API_TOKEN='<至少32字节的随机值>'
+export GO_OMNI_STORAGE_SIGNING_KEY='<另一个至少32字节的随机值>'
+export GO_OMNI_STORAGE_PUBLIC_URL='http://127.0.0.1:8080/storage/object'
+go mod tidy
+# 在本目录运行与框架版本一致的 CLI；迁移必须显式执行。
+go-omni migrate --dir migrations --apply
+go run ./cmd/server
+```
+
+源码示例的 go.mod 使用 `replace ... => ../..`。生成代码使用 `v0.8.0-preview` 响应策略入口。
+复制到独立仓库时删除 replace，保留同版本固定依赖，再执行 go mod tidy；CLI 也固定到同一版本。
+远程版本验证脚本会检查没有本地替换。
+`GO_OMNI_TRANSPORT=native` 可切换为 native，业务代码无需调整。
+
+配置是默认值 → etc/config.yaml → 环境变量。日志默认写入 var/log/server.log 并轮转，
+`GO_OMNI_LOG_OUTPUT=stderr` 可以切换为标准错误输出。MySQL 默认最多 10 条连接。
+应用检查 users 和 user_audit 表，缺失时拒绝启动，不自动改表。
+
+## 接口
+
+除健康检查、OpenAPI 和持有效签名的对象下载外，业务接口需要 `Authorization: Bearer <Token>`。
+这个 Token 代表示例的管理员；可选设置不同的 `USER_SERVICE_READ_TOKEN`，允许 GET/HEAD，写请求返回 403。可通过同一个命名中间件槽位替换为 JWT/OIDC 和业务授权策略。
+框架不会推断租户模型或自动给接口放行。
+
+| 接口 | 行为 |
+| --- | --- |
+| POST /api/v1/users | 创建，返回 201；邮箱规范化并唯一 |
+| GET /api/v1/users/:id | 查询，缺失返回 404 |
+| GET /api/v1/users?page=1&pageSize=20 | 分页，pageSize 最大 100，空结果返回 [] |
+| PUT /api/v1/users/:id | 完整更新；邮箱冲突返回 409 |
+| DELETE /api/v1/users/:id | 删除，返回 204 |
+| POST /api/v1/users/:id/export | 私有文本导出，返回 5 分钟下载链接 |
+| GET /health/ready | 数据库不可用时返回 503，恢复后重新就绪 |
+| GET /openapi.json | 与 docs/openapi.json 一致 |
+
+参数不合法返回 400，认证失败 401，只读身份写入 403，邮箱重复 409，内部故障只返回通用 500。
+OpenAPI 的数据类型、鉴权和业务错误均来自契约；401/403/404/409 带具体命名示例。业务使用生成的 `apierrors.UserNotFound()`、`apierrors.EmailTaken()` 等函数。
+
+创建、更新、删除都会在**同一个 MySQL 事务**写入 user_audit；审计写入失败时业务变更一起回滚。
+事务提交后才写成功业务日志，requestId 同时出现在 HTTP 响应、业务日志和审计记录。
+数据库异常日志不记录 SQL、DSN 或用户输入。
+
+文件导出演示 `deps.Uploads` 和 `deps.Downloads`。对象使用随机 key，签名 URL 不进入日志。
+签名过期只限制下载，不删除文件；实际项目应给 exports/ 配置保留期限或清理任务。
+只签发下载链接，不对外开放任意对象上传或签名接口。
+
+## 开发与验证
+
+```sh
+go-omni api inspect
+go-omni api generate --dry-run
+go-omni api generate
+go-omni api generate --check
+go test ./...
+```
+
+Gen.go 和 docs/openapi.json 由生成器维护；Service、Repository、迁移、鉴权、配置和 main 保留。
+修改 .api 的类型/方法签名后，需要同步修改自己的业务实现并运行测试。
+
+在框架仓库运行：
+
+```sh
+python3 scripts/verifyAPIWorkflow.py --report performance/responsePoliciesWorkflowLocal.json
+# 使用本版远程 CLI 和模块验收，无本地替换。
+python3 scripts/verifyAPIWorkflow.py --version v0.8.0-preview \
+  --report performance/responsePoliciesWorkflowRemote.json
+```
+
+验收创建只绑定 localhost 的临时 MySQL 容器（1 CPU / 768 MiB），使用随机密钥，结束时删除。
+覆盖 nethttp/native 的 CRUD、校验、鉴权、事务错误/异常/取消回滚、数据库停机恢复、
+重启持久化、签名文件下载、文件日志与优雅退出。不会连接业务服务器。

examples/userService/api/user.api

@@ -0,0 +1,86 @@
+syntax = "v1"
+info (
+ title: "User service reference"
+ version: "1.0.0"
+)
+// Stable public errors are shared by Go code and the API document.
+error (
+ Unauthenticated 401 "UNAUTHENTICATED" "authentication required"
+ Forbidden 403 "FORBIDDEN" "permission denied"
+ UserNotFound 404 "USER_NOT_FOUND" "user not found"
+ EmailTaken 409 "EMAIL_TAKEN" "email already in use"
+ InvalidUser 400 "INVALID_USER" "invalid user"
+ InvalidPage 400 "INVALID_PAGE" "invalid pagination"
+)
+auth AdminAuth (
+ type: bearer
+ middleware: Auth
+ description: "Use an administrator token for writes, or a read-only token for GET requests"
+)
+type (
+ UserResp {
+  ID int64 `json:"id"`
+  Name string `json:"name"`
+  Email string `json:"email"`
+  CreatedAt string `json:"createdAt"`
+  UpdatedAt string `json:"updatedAt"`
+ }
+ CreateUserReq {
+  Name string `json:"name" binding:"required,max=100"`
+  Email string `json:"email" binding:"required,email,max=254"`
+ }
+ UserIDReq {
+  ID int64 `path:"id,range=[1:9007199254740991]"`
+ }
+ UpdateUserReq {
+  ID int64 `path:"id,range=[1:9007199254740991]"`
+  Name string `json:"name" binding:"required,max=100"`
+  Email string `json:"email" binding:"required,email,max=254"`
+ }
+ ListUsersReq {
+  Page int `form:"page,default=1,range=[1:1000000]"`
+  PageSize int `form:"pageSize,default=20,range=[1:100]"`
+ }
+ UserPageResp {
+  Items []UserResp `json:"items"`
+  Total int `json:"total"`
+  Page int `json:"page"`
+  PageSize int `json:"pageSize"`
+ }
+ ExportResp {
+  DownloadURL string `json:"downloadUrl"`
+ }
+)
+@server (
+ group: user
+ prefix: /api/v1
+ auth: AdminAuth
+ errors: Unauthenticated
+)
+service user-api {
+ @doc (
+  summary: "Create a user"
+  description: "Normalizes the email, then commits user data and audit in one transaction"
+  tags: users
+ )
+ @errors Forbidden, InvalidUser, EmailTaken
+ @handler createUser
+ @status 201
+ post /users (CreateUserReq) returns (UserResp)
+ @errors UserNotFound
+ @handler getUser
+ get /users/:id (UserIDReq) returns (UserResp)
+ @errors InvalidPage
+ @handler listUsers
+ get /users (ListUsersReq) returns (UserPageResp)
+ @errors Forbidden, InvalidUser, UserNotFound, EmailTaken
+ @handler updateUser
+ put /users/:id (UpdateUserReq) returns (UserResp)
+ @errors Forbidden, UserNotFound
+ @handler deleteUser
+ delete /users/:id (UserIDReq)
+ @doc "Export one user as a private text object with a short-lived download link"
+ @errors Forbidden, UserNotFound
+ @handler exportUser
+ post /users/:id/export (UserIDReq) returns (ExportResp)
+}

examples/userService/cmd/server/main.go

@@ -0,0 +1,58 @@
+package main
+
+import (
+	"context"
+	"errors"
+	"example.com/userService/internal/handler"
+	"example.com/userService/internal/servicecontext"
+	"example.com/userService/internal/settings"
+	"flag"
+	omni "git.yuntuo.hk/k2safe/go-omni"
+	"git.yuntuo.hk/k2safe/go-omni/httpx"
+	"git.yuntuo.hk/k2safe/go-omni/logx"
+	"log"
+	"os"
+	"os/signal"
+	"syscall"
+)
+
+func main() {
+	path := flag.String("config", "etc/config.yaml", "configuration file; empty uses defaults and environment")
+	flag.Parse()
+	if err := run(*path); err != nil {
+		log.Fatal(err)
+	}
+}
+func run(path string) (runErr error) {
+	ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
+	defer stop()
+	cfg, err := settings.Load(path)
+	if err != nil {
+		return err
+	}
+	logger, err := logx.New(cfg.Server.Log)
+	if err != nil {
+		return err
+	}
+	defer func() { runErr = errors.Join(runErr, logger.Close()) }()
+	logx.SetDefault(logger)
+	deps, err := servicecontext.New(ctx, logger, cfg)
+	if err != nil {
+		return err
+	}
+	defer func() { runErr = errors.Join(runErr, deps.Close()) }()
+	app := omni.New(omni.WithConfig(cfg.Server))
+	app.OnShutdown(logger.Close)
+	app.OnShutdown(deps.Close)
+	for _, method := range []string{"GET", "HEAD", "PUT"} {
+		app.Handle(method, "/storage/object", func(c *httpx.Context) error { deps.FileHTTP.ServeHTTP(c.Raw(), c.Request()); return nil })
+	}
+	if err = handler.RegisterRoutes(app, deps); err != nil {
+		return err
+	}
+	app.GET("/openapi.json", handler.OpenAPI)
+	app.GET("/health/live", deps.Health.LivenessHandler())
+	app.GET("/health/ready", deps.Health.ReadinessHandler())
+	logger.InfoContext(ctx, "service.starting", "address", cfg.Server.Address)
+	return app.RunContext(ctx, cfg.Server.Address)
+}

examples/userService/etc/config.yaml

@@ -0,0 +1,36 @@
+# Non-secret settings only. Environment variables override these values.
+server:
+  address: '127.0.0.1:8080'
+  enableLogger: true
+  slowRequestThreshold: 500ms
+  shutdownTimeout: 10s
+  log:
+    service: "example.com/userService"
+    level: info
+    format: json
+    file: './var/log/server.log'
+    rotation:
+      enabled: true
+      maxSizeMb: 100
+      maxBackups: 10
+      maxAgeDays: 7
+      compress: true
+    redactKeys: []
+storage:
+  provider: local
+  maxBytes: 33554432
+  contentTypes: ['text/plain', 'image/png', 'image/jpeg', 'application/pdf']
+  linkTtl: 5m
+  requestTimeout: 30s
+  root: './var/files'
+  publicUrl: 'http://127.0.0.1:8080/storage/object'
+
+
+database:
+  driver: mysql
+  maxOpenConns: 10
+  maxIdleConns: 5
+  connMaxLifetime: 30m
+  connMaxIdleTime: 5m
+  pingTimeout: 5s
+# GO_OMNI_DB_DSN supplies the secret connection string.

examples/userService/go.mod

@@ -0,0 +1,26 @@
+module example.com/userService
+
+go 1.22.0
+
+require (
+	git.yuntuo.hk/k2safe/go-omni v0.8.0-preview
+	github.com/go-sql-driver/mysql v1.9.3
+)
+
+require (
+	filippo.io/edwards25519 v1.1.0 // indirect
+	github.com/gabriel-vasile/mimetype v1.4.3 // indirect
+	github.com/go-playground/locales v0.14.1 // indirect
+	github.com/go-playground/universal-translator v0.18.1 // indirect
+	github.com/go-playground/validator/v10 v10.20.0 // indirect
+	github.com/golang-jwt/jwt/v5 v5.3.1 // indirect
+	github.com/leodido/go-urn v1.4.0 // indirect
+	golang.org/x/crypto v0.31.0 // indirect
+	golang.org/x/net v0.33.0 // indirect
+	golang.org/x/sys v0.28.0 // indirect
+	golang.org/x/text v0.21.0 // indirect
+	gopkg.in/natefinch/lumberjack.v2 v2.2.1 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)
+
+replace git.yuntuo.hk/k2safe/go-omni => ../..

examples/userService/go.sum

@@ -0,0 +1,38 @@
+filippo.io/edwards25519 v1.1.0 h1:FNf4tywRC1HmFuKW5xopWpigGjJKiJSV0Cqo0cJWDaA=
+filippo.io/edwards25519 v1.1.0/go.mod h1:BxyFTGdWcka3PhytdK4V28tE5sGfRvvvRV7EaN4VDT4=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/gabriel-vasile/mimetype v1.4.3 h1:in2uUcidCuFcDKtdcBxlR0rJ1+fsokWf+uqxgUFjbI0=
+github.com/gabriel-vasile/mimetype v1.4.3/go.mod h1:d8uq/6HKRL6CGdk+aubisF/M5GcPfT7nKyLpA0lbSSk=
+github.com/go-playground/assert/v2 v2.2.0 h1:JvknZsQTYeFEAhQwI4qEt9cyV5ONwRHC+lYKSsYSR8s=
+github.com/go-playground/assert/v2 v2.2.0/go.mod h1:VDjEfimB/XKnb+ZQfWdccd7VUvScMdVu0Titje2rxJ4=
+github.com/go-playground/locales v0.14.1 h1:EWaQ/wswjilfKLTECiXz7Rh+3BjFhfDFKv/oXslEjJA=
+github.com/go-playground/locales v0.14.1/go.mod h1:hxrqLVvrK65+Rwrd5Fc6F2O76J/NuW9t0sjnWqG1slY=
+github.com/go-playground/universal-translator v0.18.1 h1:Bcnm0ZwsGyWbCzImXv+pAJnYK9S473LQFuzCbDbfSFY=
+github.com/go-playground/universal-translator v0.18.1/go.mod h1:xekY+UJKNuX9WP91TpwSH2VMlDf28Uj24BCp08ZFTUY=
+github.com/go-playground/validator/v10 v10.20.0 h1:K9ISHbSaI0lyB2eWMPJo+kOS/FBExVwjEviJTixqxL8=
+github.com/go-playground/validator/v10 v10.20.0/go.mod h1:dbuPbCMFw/DrkbEynArYaCwl3amGuJotoKCe95atGMM=
+github.com/go-sql-driver/mysql v1.9.3 h1:U/N249h2WzJ3Ukj8SowVFjdtZKfu9vlLZxjPXV1aweo=
+github.com/go-sql-driver/mysql v1.9.3/go.mod h1:qn46aNg1333BRMNU69Lq93t8du/dwxI64Gl8i5p1WMU=
+github.com/golang-jwt/jwt/v5 v5.3.1 h1:kYf81DTWFe7t+1VvL7eS+jKFVWaUnK9cB1qbwn63YCY=
+github.com/golang-jwt/jwt/v5 v5.3.1/go.mod h1:fxCRLWMO43lRc8nhHWY6LGqRcf+1gQWArsqaEUEa5bE=
+github.com/leodido/go-urn v1.4.0 h1:WT9HwE9SGECu3lg4d/dIA+jxlljEa1/ffXKmRjqdmIQ=
+github.com/leodido/go-urn v1.4.0/go.mod h1:bvxc+MVxLKB4z00jd1z+Dvzr47oO32F/QSNjSBOlFxI=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
+github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+golang.org/x/crypto v0.31.0 h1:ihbySMvVjLAeSH1IbfcRTkD/iNscyz8rGzjF/E5hV6U=
+golang.org/x/crypto v0.31.0/go.mod h1:kDsLvtWBEx7MV9tJOj9bnXsPbxwJQ6csT/x4KIN4Ssk=
+golang.org/x/net v0.33.0 h1:74SYHlV8BIgHIFC/LrYkOGIwL19eTYXQ5wc6TBuO36I=
+golang.org/x/net v0.33.0/go.mod h1:HXLR5J+9DxmrqMwG9qjGCxZ+zKXxBru04zlTvWlWuN4=
+golang.org/x/sys v0.28.0 h1:Fksou7UEQUWlKvIdsqzJmUmCX3cZuD2+P3XyyzwMhlA=
+golang.org/x/sys v0.28.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/text v0.21.0 h1:zyQAAkrwaneQ066sspRyJaG9VNi/YJ1NfzcGB3hZ/qo=
+golang.org/x/text v0.21.0/go.mod h1:4IBbMaMmOPCJ8SecivzSH54+73PCFmPWxNTLm+vZkEQ=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/natefinch/lumberjack.v2 v2.2.1 h1:bBRl1b0OH9s/DuPhuXpNl+VtCaJXFZ5/uEFST95x9zc=
+gopkg.in/natefinch/lumberjack.v2 v2.2.1/go.mod h1:YD8tP3GAjkrDg1eZH7EGmyESg/lsYskCTPBJVb9jqSc=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

examples/userService/internal/apierrors/errorsGen.go

@@ -0,0 +1,42 @@
+// Code generated by go-omni api. DO NOT EDIT.
+package apierrors
+
+import omnierrors "git.yuntuo.hk/k2safe/go-omni/errors"
+
+const CodeUnauthenticated = "UNAUTHENTICATED"
+
+// Unauthenticated returns a fresh public error declared in the API contract.
+func Unauthenticated() *omnierrors.APIError {
+	return omnierrors.New(401, CodeUnauthenticated, "authentication required")
+}
+
+const CodeForbidden = "FORBIDDEN"
+
+// Forbidden returns a fresh public error declared in the API contract.
+func Forbidden() *omnierrors.APIError { return omnierrors.New(403, CodeForbidden, "permission denied") }
+
+const CodeUserNotFound = "USER_NOT_FOUND"
+
+// UserNotFound returns a fresh public error declared in the API contract.
+func UserNotFound() *omnierrors.APIError {
+	return omnierrors.New(404, CodeUserNotFound, "user not found")
+}
+
+const CodeEmailTaken = "EMAIL_TAKEN"
+
+// EmailTaken returns a fresh public error declared in the API contract.
+func EmailTaken() *omnierrors.APIError {
+	return omnierrors.New(409, CodeEmailTaken, "email already in use")
+}
+
+const CodeInvalidUser = "INVALID_USER"
+
+// InvalidUser returns a fresh public error declared in the API contract.
+func InvalidUser() *omnierrors.APIError { return omnierrors.New(400, CodeInvalidUser, "invalid user") }
+
+const CodeInvalidPage = "INVALID_PAGE"
+
+// InvalidPage returns a fresh public error declared in the API contract.
+func InvalidPage() *omnierrors.APIError {
+	return omnierrors.New(400, CodeInvalidPage, "invalid pagination")
+}

examples/userService/internal/handler/responseGen.go

@@ -0,0 +1,30 @@
+// Code generated by go-omni api. DO NOT EDIT.
+package handler
+
+import (
+	"encoding/json"
+	"git.yuntuo.hk/k2safe/go-omni/response"
+	"strings"
+)
+
+var responseTemplates = map[string]response.Encoder{"": response.Default()}
+
+func newResponseTemplate(raw string) response.Encoder {
+	var cfg response.Config
+	decoder := json.NewDecoder(strings.NewReader(raw))
+	decoder.UseNumber()
+	if err := decoder.Decode(&cfg); err != nil {
+		panic(err)
+	}
+	return response.MustNew(cfg)
+}
+func responseEncoder(name string, raw bool) response.Encoder {
+	encoder := responseTemplates[name]
+	if encoder == nil {
+		panic("unknown response template")
+	}
+	if raw {
+		encoder = response.RawJSON(encoder)
+	}
+	return encoder
+}

examples/userService/internal/handler/routesGen.go

@@ -0,0 +1,28 @@
+// Code generated by go-omni api. DO NOT EDIT.
+package handler
+
+import (
+	h0 "example.com/userService/internal/handler/user"
+	s0 "example.com/userService/internal/service/user"
+	"example.com/userService/internal/servicecontext"
+	"fmt"
+	"git.yuntuo.hk/k2safe/go-omni/httpx"
+	"git.yuntuo.hk/k2safe/go-omni/openapi"
+)
+
+func RegisterRoutes(router openapi.Registrar, deps *servicecontext.Context) error {
+	if router == nil || deps == nil {
+		return fmt.Errorf("router and dependencies required")
+	}
+	if deps.Middlewares["Auth"] == nil {
+		return fmt.Errorf("missing middleware Auth")
+	}
+	h0 := h0.New(s0.New(deps), deps)
+	httpx.HandleWithResponse(router, "POST", "/api/v1/users", responseEncoder("", false), h0.CreateUser, deps.Middlewares["Auth"])
+	httpx.HandleWithResponse(router, "GET", "/api/v1/users/:id", responseEncoder("", false), h0.GetUser, deps.Middlewares["Auth"])
+	httpx.HandleWithResponse(router, "GET", "/api/v1/users", responseEncoder("", false), h0.ListUsers, deps.Middlewares["Auth"])
+	httpx.HandleWithResponse(router, "PUT", "/api/v1/users/:id", responseEncoder("", false), h0.UpdateUser, deps.Middlewares["Auth"])
+	httpx.HandleWithResponse(router, "DELETE", "/api/v1/users/:id", responseEncoder("", false), h0.DeleteUser, deps.Middlewares["Auth"])
+	httpx.HandleWithResponse(router, "POST", "/api/v1/users/:id/export", responseEncoder("", false), h0.ExportUser, deps.Middlewares["Auth"])
+	return nil
+}

examples/userService/internal/handler/user/handlersGen.go

@@ -0,0 +1,130 @@
+// Code generated by go-omni api. DO NOT EDIT.
+package user
+
+import (
+	"context"
+	"example.com/userService/internal/servicecontext"
+	"example.com/userService/internal/types"
+	"fmt"
+	"git.yuntuo.hk/k2safe/go-omni/contract"
+	"git.yuntuo.hk/k2safe/go-omni/httpx"
+)
+
+type Service interface {
+	CreateUser(ctx context.Context, req *types.CreateUserReq) (*types.UserResp, error)
+	GetUser(ctx context.Context, req *types.UserIDReq) (*types.UserResp, error)
+	ListUsers(ctx context.Context, req *types.ListUsersReq) (*types.UserPageResp, error)
+	UpdateUser(ctx context.Context, req *types.UpdateUserReq) (*types.UserResp, error)
+	DeleteUser(ctx context.Context, req *types.UserIDReq) error
+	ExportUser(ctx context.Context, req *types.UserIDReq) (*types.ExportResp, error)
+}
+type Handler struct {
+	service Service
+	deps    *servicecontext.Context
+}
+
+func New(s Service, deps ...*servicecontext.Context) *Handler {
+	h := &Handler{service: s}
+	if len(deps) > 0 {
+		h.deps = deps[0]
+	}
+	return h
+}
+
+var createUserRequest = contract.MustNew[types.CreateUserReq]()
+
+func (h *Handler) CreateUser(c *httpx.Context) error {
+	var req types.CreateUserReq
+	if err := createUserRequest.Bind(c.Request(), httpx.RouteParams(c.Context()), &req); err != nil {
+		return err
+	}
+	resp, err := h.service.CreateUser(c.Context(), &req)
+	if err != nil {
+		return err
+	}
+	if resp == nil {
+		return fmt.Errorf("CreateUser returned a nil response")
+	}
+	return c.Created(resp)
+}
+
+var getUserRequest = contract.MustNew[types.UserIDReq]()
+
+func (h *Handler) GetUser(c *httpx.Context) error {
+	var req types.UserIDReq
+	if err := getUserRequest.Bind(c.Request(), httpx.RouteParams(c.Context()), &req); err != nil {
+		return err
+	}
+	resp, err := h.service.GetUser(c.Context(), &req)
+	if err != nil {
+		return err
+	}
+	if resp == nil {
+		return fmt.Errorf("GetUser returned a nil response")
+	}
+	return c.OK(resp)
+}
+
+var listUsersRequest = contract.MustNew[types.ListUsersReq]()
+
+func (h *Handler) ListUsers(c *httpx.Context) error {
+	var req types.ListUsersReq
+	if err := listUsersRequest.Bind(c.Request(), httpx.RouteParams(c.Context()), &req); err != nil {
+		return err
+	}
+	resp, err := h.service.ListUsers(c.Context(), &req)
+	if err != nil {
+		return err
+	}
+	if resp == nil {
+		return fmt.Errorf("ListUsers returned a nil response")
+	}
+	return c.OK(resp)
+}
+
+var updateUserRequest = contract.MustNew[types.UpdateUserReq]()
+
+func (h *Handler) UpdateUser(c *httpx.Context) error {
+	var req types.UpdateUserReq
+	if err := updateUserRequest.Bind(c.Request(), httpx.RouteParams(c.Context()), &req); err != nil {
+		return err
+	}
+	resp, err := h.service.UpdateUser(c.Context(), &req)
+	if err != nil {
+		return err
+	}
+	if resp == nil {
+		return fmt.Errorf("UpdateUser returned a nil response")
+	}
+	return c.OK(resp)
+}
+
+var deleteUserRequest = contract.MustNew[types.UserIDReq]()
+
+func (h *Handler) DeleteUser(c *httpx.Context) error {
+	var req types.UserIDReq
+	if err := deleteUserRequest.Bind(c.Request(), httpx.RouteParams(c.Context()), &req); err != nil {
+		return err
+	}
+	if err := h.service.DeleteUser(c.Context(), &req); err != nil {
+		return err
+	}
+	return c.NoContent()
+}
+
+var exportUserRequest = contract.MustNew[types.UserIDReq]()
+
+func (h *Handler) ExportUser(c *httpx.Context) error {
+	var req types.UserIDReq
+	if err := exportUserRequest.Bind(c.Request(), httpx.RouteParams(c.Context()), &req); err != nil {
+		return err
+	}
+	resp, err := h.service.ExportUser(c.Context(), &req)
+	if err != nil {
+		return err
+	}
+	if resp == nil {
+		return fmt.Errorf("ExportUser returned a nil response")
+	}
+	return c.OK(resp)
+}

examples/userService/internal/middleware/auth.go

@@ -0,0 +1,50 @@
+package middleware
+
+import (
+	"crypto/sha256"
+	"crypto/subtle"
+	"errors"
+	"example.com/userService/internal/apierrors"
+	"git.yuntuo.hk/k2safe/go-omni/httpx"
+	"os"
+	"strings"
+)
+
+// Auth is the fail-closed registry default. Startup replaces it with configured
+// authentication. This example uses an administrator key and an optional read key;
+// production applications can inject JWT/OIDC through the same middleware slot.
+func Auth(next httpx.Handler) httpx.Handler {
+	return func(c *httpx.Context) error {
+		return apierrors.Unauthenticated()
+	}
+}
+func NewAuthFromEnv() (httpx.Middleware, error) {
+	token := os.Getenv("USER_SERVICE_API_TOKEN")
+	if len(token) < 32 || strings.ContainsAny(token, " \t\r\n") {
+		return nil, errors.New("USER_SERVICE_API_TOKEN requires at least 32 bytes without whitespace")
+	}
+	readToken := os.Getenv("USER_SERVICE_READ_TOKEN")
+	if readToken != "" && (len(readToken) < 32 || strings.ContainsAny(readToken, " \t\r\n") || readToken == token) {
+		return nil, errors.New("USER_SERVICE_READ_TOKEN must be a distinct token of at least 32 bytes without whitespace")
+	}
+	expectedRead := sha256.Sum256([]byte(readToken))
+	expected := sha256.Sum256([]byte(token))
+	return func(next httpx.Handler) httpx.Handler {
+		return func(c *httpx.Context) error {
+			parts := strings.Fields(c.Header("Authorization"))
+			if len(parts) != 2 || !strings.EqualFold(parts[0], "Bearer") {
+				return apierrors.Unauthenticated()
+			}
+			actual := sha256.Sum256([]byte(parts[1]))
+			admin := subtle.ConstantTimeCompare(expected[:], actual[:]) == 1
+			read := subtle.ConstantTimeCompare(expectedRead[:], actual[:]) == 1 && readToken != ""
+			if !admin && !read {
+				return apierrors.Unauthenticated()
+			}
+			if !admin && c.Request().Method != "GET" && c.Request().Method != "HEAD" {
+				return apierrors.Forbidden()
+			}
+			return next(c)
+		}
+	}, nil
+}