feat: add precise diagnostics and optional client copy logging controls

CHANGELOG.md

@@ -1,5 +1,13 @@
 # Changelog
 
+## v0.23.0-preview（2026-09-26）
+
+- MySQL/连接池、日志、HTTP 客户端、生命周期和请求策略返回字段级安全诊断，配置加载器保留文件/变量/位置与原始错误链。
+- httpc.JSON 新增 WithSuccessStatuses，单次调用可限制允许的 2xx，默认兼容，拒绝响应继续关闭和有界回收。
+- copyx.Check[S,T] / Copier.Check 预检嵌套类型与现有规则；修正空集合隐藏类型不匹配，动态接口和 converter 的具体行为继续运行时验证。
+- logx.Config.TimeZone 绑定 Logger 实例，JSON/text/子 Logger/标准日志适配一致；不修改 time.Local 或业务时间属性。
+- 无新映射文件、强制模块或第三方依赖；更新 README、各包指南和 developerTools 可运行示例。错误文本更精确，空集合中的确定类型错误现在会被拒绝。
+
 ## v0.22.0-preview（2026-09-26）
 
 - 文件显式环境引用与备用值，字符串组合/转义，安全有界展开和类型绑定；变量值原样插入、不递归处理。

CONFIG.md

@@ -141,6 +141,20 @@ config "etc/config.yaml":7:9 env "DB_PORT" field "database.port": expected a val
 
 文件最多 1 MiB；单个环境值/展开字段最多 1 MiB，展开字符串合计/变量缓存分别最多 4 MiB；解析/展开限制 64 层、100000 个节点与引用计数。拒绝无效 UTF-8、多文档、重复字段、未知字段、非普通文件；YAML 不接受 alias/merge/custom tag，XML 不接受 DTD/外部实体。不执行 shell，不自动加载 `.env`。
 
+## 框架模块的字段诊断
+
+v0.23 起 MySQL（含连接池/TLS）、通用数据库池、日志（含轮转/时区）、HTTP 客户端、退出阶段和请求策略返回字段级安全原因。沿用项目已有的 `config.AtField("database", err)` / `config.AtField("server", err)`，自动组合嵌套字段，不需业务重复校验基础参数。
+
+例如文件中 `database.port: "${DB_PORT}"` 的引用值为 70000：
+
+```text
+config "etc/config.yaml":3:9 env "DB_PORT" field "database.port": must be between 1 and 65535
+```
+
+日志级别非法指向 `server.log.level`；池参数指向 `database.pool.maxIdleConns` / `pingTimeout`。框架只公开已定义的安全原因，第三方/项目普通 error 仍显示 validation failed 并保留 errors.Is/As 原因链；业务使用 Invalid/AtField 提供公开原因。不要解析错误字符串；使用 `*config.Error` 字段。未提供字段的位置可能不可用，字段与原因仍保留。
+
+生成项目现有 Load 和 `-check-config` 自动获得这些诊断。日志可在 `server.log.timeZone` 配置 IANA 名称，见 [实例时区](logx/README.md#实例时区)。
+
 ## 可选解析器与测试来源
 
 内置格式无需项目手写加载器。需要额外格式时在已有 NewLoader 注册 Decoder，后续仍自动经过同一引用/绑定/校验流程：

COPY.md

@@ -28,6 +28,31 @@ if err := copyx.Copy(&input, req); err != nil { return err }
 
 新字段：普通接口只改 `.api` 和使用该字段的 Logic。独立 DTO/业务类型都需要此字段时，两边各声明一次；同名同类型不增加拷贝配置。检查在运行时发生，实际类型对必须有测试，不能把运行时工具当作旧生成器的编译期字段覆盖检查。
 
+## 类型预检
+
+v0.23 新增可选预检，无需填写映射文件或构造测试值：
+
+```go
+// 参数方向是源 → 目标；与 Copy 使用同一组选项。
+if err := copyx.Check[Request, BusinessInput](options...); err != nil {
+    return err
+}
+// 复用已有 Copier：传结果类型，不添加 Copy 所需的额外输出指针。
+err := copier.Check(reflect.TypeFor[Request](), reflect.TypeFor[BusinessInput]())
+```
+
+适合 CI 测试或初始化检查；这是程序执行的类型检查，不是 Go 编译器自动证明。递归检查切片/数组元素、map 键值、指针、嵌套字段、改名、忽略和严格覆盖；用已访问类型对处理递归结构。不执行 converter，也不调用构造器，不读取实例值。错误路径如 `$.Rows[].Value: copyx: incompatible types: string -> int`。
+
+Check 复用 Copy 的规则，包括浅拷贝对同类型容器的直接赋值：这种情况下内部 converter 不会自动逐项执行。需要处理内部字段时选择深拷贝或容器 converter。
+
+- 未知具体值的源 interface 需要运行时验证；无法静态判定时返回 `ErrDynamicType`。项目可给该接口类型对提供精确 converter 并承担内容验证。
+- 已注册 converter 的签名被接受，但函数不在 Check 中执行；其返回错误、panic、金额规则不能靠预检证明。
+- nil 到非可空目标、map 键转换碰撞、深拷贝结果是否残留源引用继续在 Copy 时检查。Check 成功不会关闭这些保护。
+- 实际 Copy 也修正了空集合的检查缺口：确定的嵌套类型不匹配不再因为切片/map 为空或数组长度为 0 而通过。需要这些转换时提供显式 converter；目标仍只在整体成功后更新。
+- 不引入全局配置、映射语言或业务类型；Copier.Check 可并发调用，不共享每次检查的遍历状态。
+
+示例：[developerTools](examples/developerTools/README.md)。普通同名同类型字段不需要额外配置。
+
 ## 深拷贝与构造器
 
 ```go

DEVELOPMENT.md

@@ -1,4 +1,4 @@
-# 通用业务开发指南（v0.22.0-preview）
+# 通用业务开发指南（v0.23.0-preview）
 
 从 [README](README.md) 创建服务后，业务主要维护 `.api`、配置、`svc.Init`、Logic、Repository 和项目中间件。本页说明通用接入能力；字段、错误码、权限、表结构和事务边界都由项目定义。
 

PROJECT.md

@@ -1,6 +1,6 @@
 # 生成项目与文件维护边界
 
-v0.22.0-preview 提供受管理的生成项目。安装同版远程 CLI，生成的项目直接引用该版本，无需本地 replace。根目录入口支持 `go run .` 和 `go build .`；框架本身仍然是可直接引用的库。安装和私有仓库访问见 [README](README.md#准备环境与安装)。
+v0.23.0-preview 提供受管理的生成项目。安装同版远程 CLI，生成的项目直接引用该版本，无需本地 replace。根目录入口支持 `go run .` 和 `go build .`；框架本身仍然是可直接引用的库。安装和私有仓库访问见 [README](README.md#准备环境与安装)。
 
 ## 创建和日常开发
 
@@ -215,7 +215,7 @@ get /download (DownloadReq)
 
 ## 已有服务接入步骤
 
-每个独立服务生成一个项目，module 名称、上层目录和共享业务包由项目选择。接入时固定 CLI 与框架版本为 v0.22.0-preview：
+每个独立服务生成一个项目，module 名称、上层目录和共享业务包由项目选择。接入时固定 CLI 与框架版本为 v0.23.0-preview：
 
 1. 先保留旧服务，整理实际路由及现有响应、鉴权和超时要求。在新目录执行 `go-omni new --api /path/to/service.api --module example.com/service ./service`；不对旧入口强制覆盖。
 2. 在 `.api` 中选择 `@app(defaultResponse: ...)`，显式保留原项目的字段、成功码、错误码和 `dataMode`。需要独立回执的路由单独声明 raw/produces。普通路由、404/405 和提前返回的中间件一起验收。

README.md

@@ -2,7 +2,9 @@
 
 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 Logic 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。
 
-**从这份 README 开始接入。** 当前版本 **`v0.22.0-preview`**，新生成项目采用根目录入口和 `config / svc / logic / handler`。可以固定版本开展业务接入；文件维护边界和已有服务迁移步骤见 [项目指南](PROJECT.md)，版本变化与验收见 [发布说明](RELEASE.md)。
+**从这份 README 开始接入。** 当前版本 **`v0.23.0-preview`**，新生成项目采用根目录入口和 `config / svc / logic / handler`。可以固定版本开展业务接入；文件维护边界和已有服务迁移步骤见 [项目指南](PROJECT.md)，版本变化与验收见 [发布说明](RELEASE.md)。
+
+**v0.23 改动**：配置校验定位具体字段和安全原因；`httpc.JSON` 可选限制成功状态；`copyx.Check` 无需样本预检类型；`logx` 支持实例独立时区。[四项完整示例](examples/developerTools/README.md)。
 
 **v0.19 改动**：新增可选 `copyx` 工具，用普通 Go 调用完成浅拷贝、深拷贝和显式类型转换；深拷贝会拒绝自定义转换中残留的源对象可变引用。**移除了 `mappings` / `mappingFiles` 和映射代码生成**，已有使用者须按 [迁移步骤](COPY.md#从旧-mapping-迁移) 调整，不能直接删除仍在调用的旧文件。
 
@@ -37,21 +39,21 @@ Go **1.22+**。框架不依赖 Gin，默认使用标准库网络层，提供可
 | 公共响应与特殊协议 | `.api` 定义 response 并 `@app(defaultResponse: ...)`；Go 用 `WithResponse` / Encoder | [响应配置](RESPONSE.md)、[响应模板契约](examples/contracts/responses.api) |
 | 错误目录与动态提示 | `WithErrors(catalog)` 注册一次；`ByCode(...).WithParams(...).WithCause(err)` | [错误目录](errors/README.md)、[模板参数示例](examples/contracts/errorParams.api) |
 | OpenAPI 与错误公共引用 | `.api` 自动生成；手写接口可使用 `openapi` 注册器；Go 错误目录显式导出 | [契约工具](DEVELOPMENT.md)、[注册示例](examples/platform/main.go) |
-| 结构化业务日志 | `logx.Info/Error`、`logx.FromContext(ctx)`、`logx.New`；支持轮转、脱敏、慢请求和级别更新 | [下方日志示例](#日志)、[完整配置](logx/README.md) |
+| 结构化业务日志 | `logx.Info/Error`、`logx.FromContext(ctx)`、`logx.New`；支持独立时区、轮转、脱敏、慢请求和级别更新 | [下方日志示例](#日志)、[完整配置](logx/README.md) |
 | 文件配置与环境引用 | Default()→JSON/YAML/XML 字段引用→类型绑定→校验；无隐式覆盖，支持 `-check-config` | [统一配置指南](CONFIG.md)、[完整可运行示例](examples/configuration/README.md)、[动态级别](ADVANCED.md#配置与日志热更新) |
 | 生命周期与健康检查 | svc 登记 OnClose/OnStop/OnDrain，RequestShutdown 通知故障；健康路径/开关可配 | [生命周期用法](lifecycle/README.md)、[健康检查](health/README.md)、[生成项目扩展](PROJECT.md) |
 | 数据库、连接池与事务 | `database.Open` / `OpenConnector`；事务与检查由项目显式调用 | [通用数据库](database/README.md)、[MySQL TLS/Logger](database/mysql/README.md) |
 | 可选 GORM 与迁移 | gormx 复用已有连接池；`go-omni migrate` 预览，显式 apply | [GORM 示例](database/gormx/README.md)、[迁移用法](ADVANCED.md#迁移审计与分页) |
 | 认证与权限接口 | 注入 Authenticator / Policy；JWT 或 Session 只是可选实现 | [认证说明](auth/README.md)、[鉴权完整例子](examples/platform/README.md) |
 | 缓存 | `cache.NewMemory` 或 Redis 实现；业务面向 Store 的 Get/Set/Delete | [缓存配置/代码](MODULES.md)、[可运行模块服务](examples/modules/README.md) |
-| 出站 HTTP、熔断 | `httpc.New` 配置代理、连接池和阶段超时；JSON 支持单次请求头/限额；`resilience.New` 隔离故障 | [HTTP 完整用法](httpc/README.md)、[可运行示例](examples/httpClient/README.md)、[熔断/观测](ADVANCED.md#熔断与观测) |
+| 出站 HTTP、熔断 | `httpc.New` 配置代理、连接池和阶段超时；JSON 支持单次成功状态限制/请求头/限额；`resilience.New` 隔离故障 | [HTTP 完整用法](httpc/README.md)、[可运行示例](examples/httpClient/README.md)、[熔断/观测](ADVANCED.md#熔断与观测) |
 | 请求追踪、访问日志、恢复、限流、幂等、超时 | `app.Use(...)` 按需组合 middleware；跨副本选择 Redis 实现 | [模块说明与限制](MODULES.md#请求追踪与基础指标)、[分布式实现](ADVANCED.md#分布式限流与幂等) |
 | 本地后台任务与调度 | `task.New`、Submit、Every；有界队列、排空关闭 | [task 示例与生命周期](MODULES.md#后台执行task) |
 | 持久队列 | 业务使用 Publisher / Consumer；Redis Streams 提供至少一次交付 | [队列初始化/消费示例](ADVANCED.md#可靠队列) |
 | 文件存储、直传、云端分片 | Store 的 Put/Get/Delete；Local、S3/R2、OSS 按配置装配；扩展接口提供分片续传 | [存储接口与完整例子](storage/README.md)、[本地存储服务](examples/platform/README.md) |
 | 日志关联、指标与链路 | `metrics.New().Middleware()`；telemetry 注入 OTel exporter/reader | [基础指标](MODULES.md#请求追踪与基础指标)、[OTel 用法](ADVANCED.md#熔断与观测)、[完整接入](examples/platform/main.go) |
 | 审计与分页 | `audit.New` 注入 Sink/白名单；`pagination.Parse` / `NewResult` | [解释与调用例子](ADVANCED.md#迁移审计与分页) |
-| 可选结构转换与深拷贝 | `copyx.Copy` / `Clone` / `New`；Go converter 处理差异 | [下方示例](#可选结构转换与深拷贝)、[完整 copyx 指南](COPY.md)、[可运行代码](examples/copying) |
+| 可选结构转换与深拷贝 | `copyx.Copy` / `Clone` / `New`；`Check[S,T]` 预检类型，Go converter 处理差异 | [下方示例](#可选结构转换与深拷贝)、[完整 copyx 指南](COPY.md)、[可运行代码](examples/copying) |
 | 自定义适配器验收 | `transporttest.Run`、`storagetest.Run` / `RunUploads` 验证扩展契约 | [网络契约测试入口](transport/transporttest/router.go)、[存储契约测试入口](storage/storagetest/contract.go) |
 
 ## 带认证的出站 HTTP
@@ -126,7 +128,7 @@ module 地址是 `git.yuntuo.hk/k2safe/go-omni`。先确保本机 Go 和 Git 可
 
 ```sh
 export GOPRIVATE="$(go env GOPRIVATE),git.yuntuo.hk"
-go install git.yuntuo.hk/k2safe/go-omni/cmd/go-omni@v0.22.0-preview
+go install git.yuntuo.hk/k2safe/go-omni/cmd/go-omni@v0.23.0-preview
 export PATH="$(go env GOPATH)/bin:$PATH"
 go-omni --help
 ```
@@ -283,7 +285,7 @@ go-omni new --api catalog.api \
 在业务项目的 **go.mod 所在目录**执行：
 
 ```sh
-go get git.yuntuo.hk/k2safe/go-omni@v0.22.0-preview
+go get git.yuntuo.hk/k2safe/go-omni@v0.23.0-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。希望入口和 HTTP 接入都交给生成器的项目，按 [已有服务接入步骤](PROJECT.md#已有服务接入步骤) 在新目录生成后迁入业务代码。
@@ -509,6 +511,28 @@ if err := copier.Copy(&view, input); err != nil { return err }
 
 自定义函数的源/目标类型由 Go 泛型确定。深拷贝时返回原指针、原 map、子切片或嵌套旧引用都会报错；字符串/整数原值可以返回。差异规则、nil 策略、字段覆盖、资源限制和原 mapping 移除步骤见 [copyx 指南](COPY.md)，完整类型及可运行代码见 [examples/copying](examples/copying/main.go)。工具使用运行时检查，类型对需测试；深拷贝不适用于连接、锁等资源。
 
+### 减少接入代码：四个常用入口
+
+```yaml
+server:
+  log:
+    timeZone: Asia/Shanghai
+```
+
+时区由 Logger 实例管理，不修改全局 `time.Local`。非法日志级别、数据库端口/连接池等配置会指出 `server.log.level`、`database.port` 等字段和原因，不打印输入值。详见 [配置诊断](CONFIG.md#框架模块的字段诊断)、[日志时区](logx/README.md#实例时区)。
+
+```go
+// 本次请求只接受 HTTP 200；默认仍接受所有 2xx。
+err := client.JSON(ctx, http.MethodGet, url, nil, &result,
+    httpc.WithSuccessStatuses(http.StatusOK),
+)
+
+// CI/启动时检查类型，无需构造样本；仍使用 Copy 的同一组 Option。
+err = copyx.Check[Request, BusinessInput](options...)
+```
+
+状态不符合要求返回 `*httpc.StatusError`，不会写入 result，响应体仍由框架关闭。Check 不执行 converter；动态 interface、具体 nil/转换失败和深拷贝引用检查有明确边界，见 [类型预检](COPY.md#类型预检)。完整可运行代码见 [developerTools](examples/developerTools/README.md)。
+
 ### 数据库、存储及其他模块
 
 生成项目在 `internal/svc` 中创建依赖，提供给 Logic/Repository，并用 `c.OnClose(db.Close)` 登记自有资源。生成的 main 在 HTTP 排空后关闭 svc，再关闭日志。直接使用框架的手写项目则可以用 `app.OnShutdown(db.Close)`；不要对同一资源重复登记。
@@ -587,7 +611,7 @@ go test ./...
 
 `main.go`、`Gen.go`、`docs/openapi.json` 和 manifest 由生成器管理，手动修改会报告冲突。Logic、Repository、中间件实现、配置和依赖装配属于项目，重复生成保留手写内容。契约变化会提示受影响的 Logic 文件和 DTO 字段，明确的签名错误会给出原签名与期望签名；生成后 `--check` 仍能检出未修复的问题。将 `.api`、`omni.gen.json`、生成文件和 `.goOmni/apiManifest.json` 一起提交，CI 同时运行 `generate --check` 与 `go test ./...`。详见 [契约变更提示与检查边界](PROJECT.md#契约变更提示)。
 
-CLI 与业务 module 固定使用 `v0.22.0-preview`。v0.21 及更早项目先按 [配置迁移](CONFIG.md#v022-迁移旧模式已移除) 整理旧标签、文件与 Load，再升级依赖与 CLI 并重新生成，框架维护的 main/runtimeGen 自动更新；v0.13 及更早项目按 [升级预览](DEVELOPMENT.md#v013-项目升级) 处理，不直接覆盖手写入口或业务文件。使用过旧 mapping 的项目必须先完成 [移除迁移](COPY.md#从旧-mapping-迁移)，旧配置或旧生成文件会阻止生成。升级后执行生成检查与业务回归。版本变化、迁移边界和验收记录见 [发布说明](RELEASE.md)。
+CLI 与业务 module 固定使用 `v0.23.0-preview`。v0.21 及更早项目先按 [配置迁移](CONFIG.md#v022-迁移旧模式已移除) 整理旧标签、文件与 Load，再升级依赖与 CLI 并重新生成，框架维护的 main/runtimeGen 自动更新；v0.13 及更早项目按 [升级预览](DEVELOPMENT.md#v013-项目升级) 处理，不直接覆盖手写入口或业务文件。使用过旧 mapping 的项目必须先完成 [移除迁移](COPY.md#从旧-mapping-迁移)，旧配置或旧生成文件会阻止生成。升级后执行生成检查与业务回归。版本变化、迁移边界和验收记录见 [发布说明](RELEASE.md)。
 
 ## 按需深入
 

RELEASE.md

@@ -1,4 +1,27 @@
-# v0.22.0-preview
+# v0.23.0-preview
+
+减少业务接入时重复维护的配置校验、HTTP 包装和类型检查。
+
+- 配置诊断定位 database.port、database.pool.maxIdleConns、server.log.level/timeZone 等具体字段，保留文件、环境变量、行列和安全原因；凭据不进入公开提示，原始原因可 errors.Is/As。
+- JSON 可传 `httpc.WithSuccessStatuses(200)`，默认仍接受全部 2xx；不匹配时不改目标，继续负责有界读取、关闭和连接回收，不添加新的重试规则。
+- `copyx.Check[S,T](options...)` 或已有 Copier.Check 复用同一组 Go 选项，无需样本和映射文件；实际拷贝不再因集合为空而漏过确定的类型不匹配。动态 interface、nil 值、converter 失败及深拷贝共享引用仍有运行时检查。
+- `server.log.timeZone: Asia/Shanghai` 配置实例时区；JSON/text/子日志一致，业务 time.Time 属性保持原样。极简镜像可用 `go build -tags timetzdata .` 内置时区数据，库不强制增加体积。
+
+```sh
+go get git.yuntuo.hk/k2safe/go-omni@v0.23.0-preview
+go install git.yuntuo.hk/k2safe/go-omni/cmd/go-omni@v0.23.0-preview
+go-omni api generate
+go-omni api generate --check
+go run . -config etc/config.yaml -check-config
+```
+
+现有调用接口保留；配置错误文本现在更精确，业务应通过类型/字段识别错误。空集合里确定的类型错误会提前暴露，需要显式 converter 或调整实际类型，不应靠空值跳过校验。预检通过不代表 converter 对所有业务值必定成功。当前模板最低版本仍是 v0.22，本轮新增 runtime 能力需使用 v0.23。
+
+[完整示例](examples/developerTools/README.md)、[配置](CONFIG.md)、[JSON 选项](httpc/README.md)、[类型预检](COPY.md#类型预检)、[日志时区](logx/README.md#实例时区)。验收与性能记录见 [本轮验收](reports/developerToolsAcceptance.md)。仍为 preview。
+
+---
+
+# v0.22.0-preview（历史版本）
 
 配置文件明确决定每个值的来源，项目只维护 Config、Default()、Validate() 和文件。
 

cmd/go-omni/README.md

@@ -14,7 +14,7 @@ v0.14 新增 `api format [--check]`、`api upgrade [--dry-run|--preview <空目
 
 ```sh
 # 仓库读取权限与 PATH 配置见根目录 README
-go install git.yuntuo.hk/k2safe/go-omni/cmd/go-omni@v0.22.0-preview
+go install git.yuntuo.hk/k2safe/go-omni/cmd/go-omni@v0.23.0-preview
 go-omni new --module example.com/hello ./hello
 
 # 从自己的契约生成；service.api 及其相对 import 文件需要在本地存在
@@ -49,14 +49,14 @@ main、Gen.go、OpenAPI 和 manifest 由生成器维护；业务文件按字节
 
 ## 版本与迁移
 
-CLI 与框架依赖固定使用 v0.22.0-preview。远程安装的 CLI 默认把自身版本写入 go.mod，不添加本地 replace；`--framework-version` 可显式指定已发布的兼容版本。仅在开发框架源码时使用本地替换：
+CLI 与框架依赖固定使用 v0.23.0-preview。远程安装的 CLI 默认把自身版本写入 go.mod，不添加本地 replace；`--framework-version` 可显式指定已发布的兼容版本。仅在开发框架源码时使用本地替换：
 
 ```sh
 # 在 go-omni 源码仓库中执行
 go run ./cmd/go-omni new --module example.com/hello --framework-dir . ../hello
 ```
 
-当前模板与依赖以 v0.22.0-preview 为基线，继续使用 manifest v2；GORM 可选适配器从 v0.14.1-preview 提供。已有项目使用 [定点升级与预览](../../DEVELOPMENT.md#v013-项目升级)：原始模板可自动替换，含业务修改的基础文件按预览合并；通用清理由 Runtime 负责。独立工具命令不会被删除。受管理项目通过 `.api` 模块导入增加业务，不使用旧 `add` 命令的手动路由装配。
+当前模板与依赖以 v0.23.0-preview 为基线，继续使用 manifest v2；GORM 可选适配器从 v0.14.1-preview 提供。已有项目使用 [定点升级与预览](../../DEVELOPMENT.md#v013-项目升级)：原始模板可自动替换，含业务修改的基础文件按预览合并；通用清理由 Runtime 负责。独立工具命令不会被删除。受管理项目通过 `.api` 模块导入增加业务，不使用旧 `add` 命令的手动路由装配。
 
 ## 数据库迁移命令
 

cmd/go-omni/apigen/generate.go

@@ -22,7 +22,7 @@ const frameworkModule = "git.yuntuo.hk/k2safe/go-omni"
 
 // Runtime-only releases need not raise the managed template compatibility floor.
 const minimumVersion = "v0.22.0-preview"
-const currentVersion = "v0.22.0-preview"
+const currentVersion = "v0.23.0-preview"
 const generatedHeader = "// Code generated by go-omni api. DO NOT EDIT.\n"
 
 type Options struct {

cmd/go-omni/apigen/templates.go

@@ -60,7 +60,9 @@ Unimplemented/nil factories fail startup and clean registered dependencies.
 Existing projects retain middleware: handlers until explicitly migrated.
 Ordinary Logic uses the generated Request/Response types directly. Where an
 independent business type is needed, use ordinary Go or the optional copyx package.
-Configuration loading is generator-managed in internal/config/loadGen.go. Extend fields/defaults/Validate in config.go; additional decoders belong in loader.go/NewLoader. JSON/YAML/XML use explicit ${NAME} / ${NAME:-fallback} references; fixed values are never overridden by inferred environment names. Use -check-config to validate without opening dependencies. See the framework CONFIG.md.
+Configuration loading is generator-managed in internal/config/loadGen.go. Extend fields/defaults/Validate in config.go; additional decoders belong in loader.go/NewLoader. JSON/YAML/XML use explicit ${NAME} / ${NAME:-fallback} references; fixed values are never overridden by inferred environment names. Use -check-config to validate without opening dependencies. Framework validation
+identifies fields such as server.log.level and database.port. server.log.timeZone
+optionally selects a per-logger IANA zone. See the framework CONFIG.md.
 
 There are no mappings/mappingFiles settings or generated mapping files in v0.19.
 See COPY.md in the framework repository for copy policies and migration steps,

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

@@ -91,3 +91,23 @@ func TestConfigurationCheckProcess(t *testing.T) {
 		t.Fatal(err, string(out))
 	}
 }
+
+func TestGeneratedModuleFieldDiagnostic(t *testing.T) {
+	path := filepath.Join(t.TempDir(), "config.yaml")
+	t.Setenv("EXAMPLE_LOG_LEVEL", "invalid-private-level")
+	if err := os.WriteFile(path, []byte("server:\n  log:\n    level: '${EXAMPLE_LOG_LEVEL}'\n"), 0600); err != nil {
+		t.Fatal(err)
+	}
+	err := run(context.Background(), path)
+	var d *omniConfig.Error
+	if !errors.As(err, &d) || d.Field != "server.log.level" || d.Line != 3 || d.Env != "EXAMPLE_LOG_LEVEL" || !strings.Contains(d.Reason, "debug") || strings.Contains(err.Error(), "invalid-private-level") {
+		t.Fatal(err)
+	}
+	if err := os.WriteFile(path, []byte("server:\n  log:\n    timeZone: Asia/Shanghai\n"), 0600); err != nil {
+		t.Fatal(err)
+	}
+	cfg, err := config.Load(path)
+	if err != nil || cfg.Server.Log.TimeZone != "Asia/Shanghai" {
+		t.Fatal(err)
+	}
+}

cmd/go-omni/scaffold/version.go

@@ -10,7 +10,7 @@ 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 = "v0.22.0-preview"
+const defaultFrameworkVersion = "v0.23.0-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.

config/diagnostic.go

@@ -4,6 +4,8 @@ import (
 	"errors"
 	"fmt"
 	"strings"
+
+	"git.yuntuo.hk/k2safe/go-omni/internal/configdiag"
 )
 
 // Error is a value-free diagnostic. Cause may contain private parser details;
@@ -56,6 +58,10 @@ func validationError(err error) *Error {
 		out.cause = err
 		return &out
 	}
+	var nested *configdiag.Error
+	if errors.As(err, &nested) {
+		return &Error{Field: nested.Field, Reason: nested.Reason, cause: err}
+	}
 	var c *ConfigError
 	if errors.As(err, &c) {
 		return &Error{Field: c.Field, Reason: c.Message, cause: err}

config/moduleDiagnostics_test.go

@@ -0,0 +1,85 @@
+package config_test
+
+import (
+	"errors"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"git.yuntuo.hk/k2safe/go-omni/config"
+	mysql "git.yuntuo.hk/k2safe/go-omni/database/mysql"
+	"git.yuntuo.hk/k2safe/go-omni/httpc"
+)
+
+type moduleConfig struct {
+	Database mysql.Config  `json:"database"`
+	Server   config.Config `json:"server"`
+	Client   httpc.Config  `json:"client"`
+}
+
+func (c moduleConfig) Validate() error {
+	if err := c.Database.Validate(); err != nil {
+		return config.AtField("database", err)
+	}
+	if err := c.Server.Validate(); err != nil {
+		return config.AtField("server", err)
+	}
+	return config.AtField("client", c.Client.Validate())
+}
+func TestModuleFieldDiagnostics(t *testing.T) {
+	for _, tc := range []struct{ name, source, field, reason string }{
+		{"port", "database:\n  port: 70000\n", "database.port", "1 and 65535"},
+		{"host", "database:\n  host: 'invalid host'\n", "database.host", "hostname"},
+		{"pool", "database:\n  pool:\n    maxIdleConns: 999\n", "database.pool.maxIdleConns", "maxOpenConns"},
+		{"ping", "database:\n  pool:\n    pingTimeout: 0s\n", "database.pool.pingTimeout", "positive"},
+		{"timeout", "database:\n  readTimeout: -1s\n", "database.readTimeout", "nonnegative"},
+		{"mysqlZone", "database:\n  location: Secret/Not_A_Zone\n", "database.location", "IANA"},
+		{"tlsPair", "database:\n  tls:\n    certFile: secret-file\n    keyFile: ''\n", "database.tls.keyFile", "certFile"},
+		{"level", "server:\n  log:\n    level: secret-level\n", "server.log.level", "debug"},
+		{"format", "server:\n  log:\n    format: secret-format\n", "server.log.format", "json or text"},
+		{"rotation", "server:\n  log:\n    rotation:\n      maxBackups: -1\n", "server.log.rotation.maxBackups", "10000"},
+		{"zone", "server:\n  log:\n    timeZone: Secret/Not_A_Zone\n", "server.log.timeZone", "IANA"},
+		{"lifecycle", "server:\n  lifecycle:\n    stopTimeout: -1s\n", "server.lifecycle.stopTimeout", "nonnegative"},
+		{"policy", "server:\n  request:\n    body: secret-mode\n", "server.request.body", "required"},
+		{"clientPool", "client:\n  maxIdleConns: -1\n", "client.maxIdleConns", "131072"},
+		{"proxy", "client:\n  proxy:\n    mode: url\n    url: 'https://private:secret@localhost/path'\n", "client.proxy.url", "origin"},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			path := filepath.Join(t.TempDir(), "config.yaml")
+			if err := os.WriteFile(path, []byte(tc.source), 0600); err != nil {
+				t.Fatal(err)
+			}
+			_, err := config.LoadProject(path, moduleConfig{Database: mysql.DefaultConfig(), Server: config.Default()})
+			var d *config.Error
+			if !errors.As(err, &d) || d.Field != tc.field || d.File != path || d.Line <= 1 || d.Column <= 0 || !strings.Contains(d.Reason, tc.reason) {
+				t.Fatalf("diagnostic: %v", err)
+			}
+			if strings.Contains(err.Error(), "secret") || strings.Contains(err.Error(), "Secret/") || strings.Contains(err.Error(), "private") {
+				t.Fatalf("value leaked: %v", err)
+			}
+		})
+	}
+}
+func TestModuleDiagnosticsKeepReferenceAndCause(t *testing.T) {
+	t.Setenv("CHECK_PORT", "70000")
+	path := filepath.Join(t.TempDir(), "config.yaml")
+	os.WriteFile(path, []byte("database:\n  port: '${CHECK_PORT}'\n"), 0600)
+	_, err := config.LoadProject(path, moduleConfig{Database: mysql.DefaultConfig(), Server: config.Default()})
+	var d *config.Error
+	if !errors.As(err, &d) || d.Field != "database.port" || d.Env != "CHECK_PORT" || d.Line != 2 {
+		t.Fatal(err)
+	}
+	original := mysql.DefaultConfig()
+	original.Port = 70000
+	cause := original.Validate()
+	wrapped := config.AtField("database", cause)
+	if !errors.Is(wrapped, cause) {
+		t.Fatal("lost original validation error")
+	}
+	// Unknown project errors continue to be redacted rather than echoed.
+	wrapped = config.AtField("custom", errors.New("private-password"))
+	if strings.Contains(wrapped.Error(), "private-password") {
+		t.Fatal(wrapped)
+	}
+}

contract/policy.go

@@ -3,9 +3,11 @@ package contract
 import (
 	"context"
 	"errors"
-	"fmt"
 	"io"
+	"strings"
 	"unicode/utf8"
+
+	"git.yuntuo.hk/k2safe/go-omni/internal/configdiag"
 )
 
 // RequestPolicy describes protocol strictness, independently of business
@@ -35,7 +37,7 @@ func (p RequestPolicy) Validate() error {
 			ok = ok || value == item.value
 		}
 		if !ok {
-			return fmt.Errorf("request policy: invalid %s", item.name)
+			return configdiag.New(item.name, "must be one of "+strings.Join(item.allowed, ", "))
 		}
 	}
 	return nil

copyx/check.go

@@ -0,0 +1,192 @@
+package copyx
+
+import (
+	"errors"
+	"fmt"
+	"reflect"
+	"sort"
+)
+
+// ErrDynamicType means a source interface requires a concrete runtime value.
+// An exact converter can explicitly own that dynamic boundary.
+var ErrDynamicType = errors.New("copyx: dynamic source type requires runtime validation or an exact converter")
+
+// Check validates a source/target type pair using the same options as Copy.
+// It never executes converters and requires no example values. Nil policies,
+// converter failures, map-key collisions and deep reference isolation still
+// require runtime checks. Options remain local; no mapping files or registration.
+func Check[S, T any](options ...Option) error {
+	c, err := New(options...)
+	if err != nil {
+		return err
+	}
+	return c.Check(reflect.TypeFor[S](), reflect.TypeFor[T]())
+}
+
+// Check validates types with an existing Copier's immutable settings. The target
+// is the result type (not Copy's extra output pointer). Safe for concurrent use.
+func (c *Copier) Check(source, target reflect.Type) error {
+	if c == nil {
+		return errors.New("copyx: nil Copier")
+	}
+	if source == nil || target == nil {
+		return errors.New("copyx: source and target types are required")
+	}
+	return newTypeChecker(&c.options, false).check(source, target, "$", 0)
+}
+
+type typeChecker struct {
+	options      *settings
+	allowDynamic bool
+	seen         map[pair]bool
+	nodes        int
+}
+
+func newTypeChecker(options *settings, allowDynamic bool) *typeChecker {
+	return &typeChecker{options: options, allowDynamic: allowDynamic, seen: map[pair]bool{}}
+}
+
+// Absent elements can reveal type/field mismatches, but contain no actual
+// resource handles or dynamic interface values to validate. Runtime checks stay
+// responsible for those value-dependent cases.
+func (s *state) checkAbsent(from, to reflect.Type, path string) error {
+	if s.checkedTypes == nil {
+		s.checkedTypes = map[pair]bool{}
+	}
+	checker := typeChecker{options: s.options, allowDynamic: true, seen: s.checkedTypes, nodes: s.checkedNodes}
+	err := checker.check(from, to, path, 0)
+	s.checkedNodes = checker.nodes
+	return err
+}
+func (c *typeChecker) check(from, to reflect.Type, path string, depth int) error {
+	c.nodes++
+	if depth > maxDepth || c.nodes > maxNodes {
+		return at(path, ErrLimit)
+	}
+	key := pair{from, to}
+	if c.seen[key] {
+		return nil
+	}
+	c.seen[key] = true
+	if !c.allowDynamic && !shallowSafe(to) {
+		return at(path, ErrUnsupported)
+	}
+	if _, ok := c.options.converters[key]; ok {
+		return nil
+	}
+	if from == to && len(c.options.converters) == 0 && len(c.options.fields) == 0 && !c.options.skipZero && c.options.nilPolicy != NilSkip {
+		if !c.options.deep || simpleValue(to) {
+			return nil
+		}
+	}
+	if from.Kind() == reflect.Interface {
+		if c.allowDynamic {
+			return nil
+		}
+		return at(path, ErrDynamicType)
+	}
+	if to.Kind() == reflect.Interface {
+		if !from.Implements(to) {
+			return at(path, ErrType)
+		}
+		return c.check(from, from, path, depth+1)
+	}
+	if !c.allowDynamic && c.options.deep && forbidden(to) {
+		return at(path, ErrUnsupported)
+	}
+	if from.Kind() == reflect.Pointer && to.Kind() != reflect.Pointer {
+		return c.check(from.Elem(), to, path, depth+1)
+	}
+	if to.Kind() == reflect.Pointer {
+		if !c.options.deep && from == to {
+			return nil
+		}
+		if from.Kind() == reflect.Pointer {
+			from = from.Elem()
+		}
+		return c.check(from, to.Elem(), path, depth+1)
+	}
+	if from.Kind() != to.Kind() {
+		return at(path, fmt.Errorf("%w: %s -> %s", ErrType, from, to))
+	}
+	if to == timeType && from == to {
+		return nil
+	}
+	switch to.Kind() {
+	case reflect.Struct:
+		for i := 0; i < to.NumField(); i++ {
+			f := to.Field(i)
+			if !c.allowDynamic && f.PkgPath != "" && (from != to || c.options.deep && privateMutable(f.Type)) {
+				return at(path+"."+f.Name, ErrUnsupported)
+			}
+		}
+		sources, targets := exportedFields(from), exportedFields(to)
+		rules := c.options.fields[key]
+		if rules == nil {
+			rules = &fields{}
+		}
+		reverse, used := map[string]string{}, map[string]bool{}
+		for a, b := range rules.names {
+			reverse[b] = a
+		}
+		for _, name := range sortedFieldNames(targets) {
+			if rules.ignoreTarget[name] {
+				continue
+			}
+			sourceName := name
+			if n, ok := reverse[name]; ok {
+				sourceName = n
+			}
+			source, ok := sources[sourceName]
+			if !ok || rules.ignoreSource[sourceName] {
+				return at(path+"."+name, ErrField)
+			}
+			used[sourceName] = true
+			if err := c.check(source.Type, targets[name].Type, path+"."+name, depth+1); err != nil {
+				return err
+			}
+		}
+		if c.options.strict {
+			for _, name := range sortedFieldNames(sources) {
+				if !used[name] && !rules.ignoreSource[name] {
+					return at(path+"."+name, ErrField)
+				}
+			}
+		}
+		return nil
+	case reflect.Slice:
+		if !c.options.deep && from == to {
+			return nil
+		}
+		return c.check(from.Elem(), to.Elem(), path+"[]", depth+1)
+	case reflect.Array:
+		if from.Len() != to.Len() {
+			return at(path, ErrType)
+		}
+		return c.check(from.Elem(), to.Elem(), path+"[]", depth+1)
+	case reflect.Map:
+		if !c.options.deep && from == to {
+			return nil
+		}
+		if err := c.check(from.Key(), to.Key(), path+"[key]", depth+1); err != nil {
+			return err
+		}
+		return c.check(from.Elem(), to.Elem(), path+"[value]", depth+1)
+	case reflect.Func, reflect.Chan, reflect.UnsafePointer:
+		if c.options.deep && !c.allowDynamic {
+			return at(path, ErrUnsupported)
+		}
+	}
+	if from != to {
+		return at(path, fmt.Errorf("%w: %s -> %s", ErrType, from, to))
+	}
+	return nil
+}
+func sortedFieldNames(fields map[string]reflect.StructField) []string {
+	names := make([]string, 0, len(fields))
+	for name := range fields {
+		names = append(names, name)
+	}
+	sort.Strings(names)
+	return names
+}

copyx/check_test.go

@@ -0,0 +1,192 @@
+package copyx_test
+
+import (
+	"errors"
+	"reflect"
+	"strings"
+	"sync"
+	"testing"
+
+	"git.yuntuo.hk/k2safe/go-omni/copyx"
+)
+
+type checkSource struct{ Rows []checkSourceRow }
+type checkSourceRow struct{ Value string }
+type checkTarget struct{ Rows []checkTargetRow }
+type checkTargetRow struct{ Value int }
+type recursiveSource struct {
+	Children []*recursiveSource
+	Value    string
+}
+type recursiveTarget struct {
+	Children []*recursiveTarget
+	Value    int
+}
+type recursiveCompatible struct {
+	Children []*recursiveCompatible
+	Value    string
+}
+
+func TestCheckTypesAndEmptyCollections(t *testing.T) {
+	err := copyx.Check[checkSource, checkTarget]()
+	var field *copyx.Error
+	if !errors.Is(err, copyx.ErrType) || !errors.As(err, &field) || field.Path != "$.Rows[].Value" {
+		t.Fatal(err)
+	}
+	for _, rows := range [][]checkSourceRow{nil, {}, {{Value: "42"}}} {
+		out := checkTarget{Rows: []checkTargetRow{{Value: 99}}}
+		if err := copyx.Copy(&out, checkSource{rows}); !errors.Is(err, copyx.ErrType) {
+			t.Fatalf("rows %v: %v", rows, err)
+		}
+		if len(out.Rows) != 1 || out.Rows[0].Value != 99 {
+			t.Fatal("partial target committed")
+		}
+	}
+	if err := copyx.Check[map[string]checkSourceRow, map[string]checkTargetRow](); !errors.Is(err, copyx.ErrType) {
+		t.Fatal(err)
+	}
+	var dst map[string]checkTargetRow
+	if err := copyx.Copy(&dst, map[string]checkSourceRow{}); !errors.Is(err, copyx.ErrType) {
+		t.Fatal(err)
+	}
+	var array [0]checkTargetRow
+	if err := copyx.Copy(&array, [0]checkSourceRow{}); !errors.Is(err, copyx.ErrType) {
+		t.Fatal(err)
+	}
+	if err := copyx.Check[map[string]int, map[int]int](); !errors.Is(err, copyx.ErrType) {
+		t.Fatal(err)
+	}
+	if err := copyx.Check[[2]int, [3]int](); !errors.Is(err, copyx.ErrType) {
+		t.Fatal(err)
+	}
+	if err := copyx.Check[*recursiveSource, *recursiveTarget](); !errors.Is(err, copyx.ErrType) {
+		t.Fatal(err)
+	}
+	if err := copyx.Check[*recursiveSource, *recursiveCompatible](copyx.WithDeepCopy()); err != nil {
+		t.Fatal(err)
+	}
+}
+func TestCheckRulesAndConverterBoundaries(t *testing.T) {
+	type from struct {
+		Name  string
+		Extra bool
+	}
+	type to struct {
+		Label string
+		Keep  int
+	}
+	options := []copyx.Option{copyx.WithStrictFields(), copyx.WithFieldNames[from, to](map[string]string{"Name": "Label"}), copyx.WithIgnoreSource[from, to]("Extra"), copyx.WithIgnoreTarget[from, to]("Keep")}
+	if err := copyx.Check[from, to](options...); err != nil {
+		t.Fatal(err)
+	}
+	if err := copyx.Check[from, to](); !errors.Is(err, copyx.ErrField) {
+		t.Fatal(err)
+	}
+	type short struct{ Name string }
+	if err := copyx.Check[from, short](copyx.WithStrictFields()); !errors.Is(err, copyx.ErrField) {
+		t.Fatal(err)
+	}
+	if err := copyx.Check[checkSource, checkTarget](copyx.WithConverter(func(string) (int, error) { panic("check must not execute converters") })); err != nil {
+		t.Fatal(err)
+	}
+	if err := copyx.Check[struct{ Value any }, struct{ Value int }](); !errors.Is(err, copyx.ErrDynamicType) {
+		t.Fatal(err)
+	}
+	if err := copyx.Check[any, int](copyx.WithConverter(func(any) (int, error) { panic("not called") })); err != nil {
+		t.Fatal(err)
+	}
+	if err := copyx.Check[*int, int](); err != nil {
+		t.Fatal(err)
+	} // Actual nil remains a runtime error.
+	var src *int
+	dst := 1
+	if err := copyx.Copy(&dst, src); !errors.Is(err, copyx.ErrNil) || dst != 1 {
+		t.Fatal(err)
+	}
+	var empty []int
+	if err := copyx.Copy(&empty, []any{}); err != nil || empty == nil {
+		t.Fatal("dynamic emptiness changed", err)
+	}
+	if err := copyx.Check[sync.Mutex, sync.Mutex](); !errors.Is(err, copyx.ErrUnsupported) {
+		t.Fatal(err)
+	}
+	option := copyx.WithConverter(func(v []int) ([]int, error) { return v, nil })
+	if err := copyx.Check[[]int, []int](copyx.WithDeepCopy(), option); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := copyx.Clone([]int{1}, option); !errors.Is(err, copyx.ErrSharedReference) {
+		t.Fatal("type check bypassed graph audit", err)
+	}
+}
+func TestCopierCheckConcurrentAndOptionsIsolation(t *testing.T) {
+	good, _ := copyx.New(copyx.WithConverter(func(string) (int, error) { return 42, nil }))
+	bad, _ := copyx.New()
+	var wg sync.WaitGroup
+	for i := 0; i < 24; i++ {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			for j := 0; j < 20; j++ {
+				if err := good.Check(reflect.TypeFor[checkSource](), reflect.TypeFor[checkTarget]()); err != nil {
+					t.Error(err)
+				}
+				if err := bad.Check(reflect.TypeFor[checkSource](), reflect.TypeFor[checkTarget]()); !errors.Is(err, copyx.ErrType) {
+					t.Error(err)
+				}
+				var target checkTarget
+				if err := good.Copy(&target, checkSource{Rows: []checkSourceRow{}}); err != nil || target.Rows == nil {
+					t.Error(err)
+				}
+			}
+		}()
+	}
+	wg.Wait()
+	if err := good.Check(nil, reflect.TypeFor[int]()); err == nil {
+		t.Fatal("nil type accepted")
+	}
+	var absent *copyx.Copier
+	if err := absent.Check(reflect.TypeFor[int](), reflect.TypeFor[int]()); err == nil {
+		t.Fatal("nil copier accepted")
+	}
+	if err := copyx.Check[int, string](); err == nil || !strings.Contains(err.Error(), "int -> string") {
+		t.Fatal(err)
+	}
+}
+func BenchmarkTypeCheck(b *testing.B) {
+	c, _ := copyx.New(copyx.WithConverter(func(string) (int, error) { return 1, nil }))
+	from, to := reflect.TypeFor[checkSource](), reflect.TypeFor[checkTarget]()
+	b.ReportAllocs()
+	for i := 0; i < b.N; i++ {
+		if err := c.Check(from, to); err != nil {
+			b.Fatal(err)
+		}
+	}
+}
+
+func TestEmptyTypeCheckPreservesAbsentValueSemantics(t *testing.T) {
+	var callback func()
+	if out, err := copyx.Clone(callback); err != nil || out != nil {
+		t.Fatal(err)
+	}
+	if out, err := copyx.Clone([]func(){}); err != nil || out == nil || len(out) != 0 {
+		t.Fatal(err)
+	}
+	if _, err := copyx.Clone([]func(){func() {}}); !errors.Is(err, copyx.ErrUnsupported) {
+		t.Fatal(err)
+	}
+	if err := copyx.Check[[]func(), []func()](copyx.WithDeepCopy()); !errors.Is(err, copyx.ErrUnsupported) {
+		t.Fatal("preflight must report potentially non-nil handles", err)
+	}
+	type from struct {
+		Ignored *int
+		Value   string
+	}
+	type to struct {
+		Ignored *int
+		Value   int
+	}
+	var dst []to
+	if err := copyx.Copy(&dst, []from{}, copyx.WithDeepCopy()); !errors.Is(err, copyx.ErrType) {
+		t.Fatal(err)
+	}
+}

copyx/copy.go

@@ -95,6 +95,8 @@ type state struct {
 	nodes        int
 	allocated    uint64
 	valueRoot    *reference
+	checkedTypes map[pair]bool
+	checkedNodes int
 }
 
 func (s *state) reserve(count int, size uintptr, path string) error {
@@ -239,6 +241,11 @@ func (s *state) walk(src, base reflect.Value, t reflect.Type, path string, depth
 	case reflect.Struct:
 		return s.structure(src, base, t, path, depth)
 	case reflect.Slice:
+		if src.Len() == 0 {
+			if err := s.checkAbsent(src.Type(), t, path); err != nil {
+				return reflect.Value{}, err
+			}
+		}
 		if !s.options.deep && src.Type() == t {
 			return src, nil
 		}
@@ -264,6 +271,11 @@ func (s *state) walk(src, base reflect.Value, t reflect.Type, path string, depth
 		}
 		return out, nil
 	case reflect.Array:
+		if src.Len() == 0 {
+			if err := s.checkAbsent(src.Type(), t, path); err != nil {
+				return reflect.Value{}, err
+			}
+		}
 		if src.Len() != t.Len() {
 			return reflect.Value{}, at(path, ErrType)
 		}
@@ -280,6 +292,11 @@ func (s *state) walk(src, base reflect.Value, t reflect.Type, path string, depth
 		}
 		return out, nil
 	case reflect.Map:
+		if src.Len() == 0 {
+			if err := s.checkAbsent(src.Type(), t, path); err != nil {
+				return reflect.Value{}, err
+			}
+		}
 		if !s.options.deep && src.Type() == t {
 			return src, nil
 		}

database/connector.go

@@ -7,6 +7,8 @@ import (
 	"errors"
 	"reflect"
 	"time"
+
+	"git.yuntuo.hk/k2safe/go-omni/internal/configdiag"
 )
 
 // PoolConfig contains only driver-independent settings. Connection credentials,
@@ -25,15 +27,29 @@ func DefaultPoolConfig() PoolConfig {
 }
 
 func (c PoolConfig) Validate() error {
-	if c.MaxOpenConns < 0 || c.MaxIdleConns < 0 {
+	for _, f := range []struct {
-		return errors.New("database pool limits cannot be negative")
+		name  string
+		value int
+	}{{"maxOpenConns", c.MaxOpenConns}, {"maxIdleConns", c.MaxIdleConns}} {
+		if f.value < 0 {
+			return configdiag.New(f.name, "must be nonnegative")
+		}
 	}
 	if c.MaxOpenConns > 0 && c.MaxIdleConns > c.MaxOpenConns {
-		return errors.New("max idle connections cannot exceed max open connections")
+		return configdiag.New("maxIdleConns", "must not exceed maxOpenConns")
 	}
-	if c.ConnMaxLifetime < 0 || c.ConnMaxIdleTime < 0 || c.PingTimeout <= 0 {
+	for _, f := range []struct {
-		return errors.New("database timeouts are invalid")
+		name  string
+		value time.Duration
+	}{{"connMaxLifetime", c.ConnMaxLifetime}, {"connMaxIdleTime", c.ConnMaxIdleTime}} {
+		if f.value < 0 {
+			return configdiag.New(f.name, "must be nonnegative")
 		}
+	}
+	if c.PingTimeout <= 0 {
+		return configdiag.New("pingTimeout", "must be positive")
+	}
+
 	return nil
 }
 

database/database.go

@@ -10,6 +10,8 @@ import (
 	"fmt"
 	"strings"
 	"time"
+
+	"git.yuntuo.hk/k2safe/go-omni/internal/configdiag"
 )
 
 type Config struct {
@@ -43,10 +45,10 @@ func (c Config) PoolConfig() PoolConfig {
 
 func (c Config) Validate() error {
 	if strings.TrimSpace(c.Driver) == "" {
-		return errors.New("database driver is required")
+		return configdiag.New("driver", "is required")
 	}
 	if strings.TrimSpace(c.DSN) == "" {
-		return errors.New("database DSN is required")
+		return configdiag.New("dsn", "is required")
 	}
 	return c.PoolConfig().Validate()
 }

database/mysql/README.md

@@ -70,3 +70,7 @@ func (c *ServiceContext) DatabaseOptions() []mysqladapter.Option {
 `WithDriverConfig(func(*mysql.Config) error)` 支持高级拨号、驱动参数等，配置在回调后克隆；这是项目明确选择的底层扩展。`NewConnector` 返回标准 driver.Connector，供已有基础设施使用；它不接受启动检查选项。任意驱动仍可用核心 `database.OpenConnector`。
 
 错误有安全摘要，errors.Is/As 保留 TLS/驱动/项目检查的原因。配置验证不读证书、不连接数据库；Open 才读取证书、创建池并握手。不要自行打印原始配置或展开可能包含内部信息的 driver 字段给用户。
+
+## 字段级配置错误
+
+Validate 返回独立字段与安全原因，例如 port（1–65535）、readTimeout、pool.maxIdleConns、tls.keyFile。项目调用 `config.AtField("database", err)` 后，统一加载器补齐 database 前缀、文件、环境名和行列，无需重复写端口/连接池校验。TLS 成对配置会指出缺失的那个字段。连接失败、驱动和证书文件的内部原因仍通过 errors.Is/As 保留，不把凭据放进公开提示。见 [配置诊断](../../CONFIG.md#框架模块的字段诊断)。

database/mysql/mysql.go

@@ -19,6 +19,7 @@ import (
 	"time"
 
 	"git.yuntuo.hk/k2safe/go-omni/database"
+	"git.yuntuo.hk/k2safe/go-omni/internal/configdiag"
 	"git.yuntuo.hk/k2safe/go-omni/logx"
 	mysqldriver "github.com/go-sql-driver/mysql"
 )
@@ -61,45 +62,60 @@ var identifier = regexp.MustCompile(`^[A-Za-z_][A-Za-z0-9_]*$`)
 // Validate does not read certificate files or open connections. All defaults
 // come from DefaultConfig; explicit zero I/O timeouts mean no driver deadline.
 func (c Config) Validate() error {
-	if c.Socket == "" && (c.Host == "" || strings.ContainsAny(c.Host, "/\r\n\t ") || c.Port < 1 || c.Port > 65535) {
+	if c.Socket == "" {
-		return errors.New("mysql: invalid host or port")
+		if c.Host == "" || strings.ContainsAny(c.Host, "/\r\n\t ") {
+			return configdiag.New("host", "must be a nonempty hostname or IP address")
 		}
-	if strings.ContainsRune(c.Socket, 0) || strings.ContainsRune(c.Database, 0) || strings.ContainsRune(c.User, 0) {
+		if c.Port < 1 || c.Port > 65535 {
-		return errors.New("mysql: invalid connection field")
+			return configdiag.New("port", "must be between 1 and 65535")
+		}
+	}
+	for _, f := range []struct{ name, value string }{{"socket", c.Socket}, {"database", c.Database}, {"user", c.User}} {
+		if strings.ContainsRune(f.value, 0) {
+			return configdiag.New(f.name, "must not contain a NUL character")
+		}
+	}
+	for _, f := range []struct {
+		name  string
+		value time.Duration
+	}{{"connectTimeout", c.ConnectTimeout}, {"readTimeout", c.ReadTimeout}, {"writeTimeout", c.WriteTimeout}} {
+		if f.value < 0 {
+			return configdiag.New(f.name, "must be nonnegative")
 		}
-	if c.ConnectTimeout < 0 || c.ReadTimeout < 0 || c.WriteTimeout < 0 {
-		return errors.New("mysql: timeouts cannot be negative")
 	}
 	if err := c.Pool.Validate(); err != nil {
-		return err
+		return configdiag.At("pool", err)
 	}
 	if c.Location != "" {
 		if _, err := time.LoadLocation(c.Location); err != nil {
-			return errors.New("mysql: invalid time location")
+			return configdiag.Wrap("location", "must be an available IANA time zone or UTC", err)
 		}
 	}
 	if c.Charset != "" && !identifier.MatchString(c.Charset) {
-		return errors.New("mysql: invalid charset")
+		return configdiag.New("charset", "must be a valid MySQL identifier")
 	}
 	if c.Collation != "" && !identifier.MatchString(c.Collation) {
-		return errors.New("mysql: invalid collation")
+		return configdiag.New("collation", "must be a valid MySQL identifier")
 	}
 	for key := range c.Session {
 		if !identifier.MatchString(key) {
-			return errors.New("mysql: invalid session variable name")
+			return configdiag.New("session", "keys must be valid MySQL identifiers")
 		}
 	}
 	if c.TLS.Mode != "" && c.TLS.Mode != "required" && c.TLS.Mode != "disabled" {
-		return errors.New("mysql: TLS mode must be required or disabled")
+		return configdiag.New("tls.mode", "must be required or disabled")
 	}
 	if (c.TLS.CertFile == "") != (c.TLS.KeyFile == "") {
-		return errors.New("mysql: TLS client certificate and key must be configured together")
+		if c.TLS.CertFile == "" {
+			return configdiag.New("tls.certFile", "is required when keyFile is configured")
+		}
+		return configdiag.New("tls.keyFile", "is required when certFile is configured")
 	}
 	if c.TLS.Mode == "disabled" && (c.TLS.CAFile != "" || c.TLS.CertFile != "" || c.TLS.ServerName != "") {
-		return errors.New("mysql: TLS fields cannot be used when disabled")
+		return configdiag.New("tls.mode", "must be required when TLS fields are configured")
 	}
 	if c.Socket != "" && c.TLS.Mode != "disabled" && c.TLS.ServerName == "" {
-		return errors.New("mysql: TLS over a unix socket requires serverName")
+		return configdiag.New("tls.serverName", "is required for TLS over a unix socket")
 	}
 	return nil
 }

examples/developerTools/README.md

@@ -0,0 +1,18 @@
+# 配置诊断、严格 HTTP 状态、类型预检和日志时区
+
+在框架根目录运行，不需要数据库、账号或外部服务。HTTP 示例只访问临时 localhost 服务：
+
+```sh
+go run ./examples/developerTools
+DEMO_LOG_TIME_ZONE=UTC go run ./examples/developerTools
+# 以下两条应非零退出，输出具体字段和环境变量名，不输出原值：
+DEMO_DB_PORT=70000 go run ./examples/developerTools
+DEMO_LOG_LEVEL=invalid go run ./examples/developerTools
+```
+
+- 配置只做校验，没有连接数据库。失败指向 `database.port` / `server.log.level`，并保留文件行列与变量名。
+- Logger 使用选定时区；只改变记录的时间戳，不修改全局 time.Local 和业务时间字段。
+- `copyx.Check[Input, Result]` 发现切片元素内的不兼容字段；加上显式 `strconv.Atoi` converter 后通过。预检不执行 converter，真实非法数字仍在 Copy 时返回错误。
+- JSON 调用显式 `WithSuccessStatuses(200)`，拒绝 201，框架仍负责关闭响应体。
+
+详见 [配置](../../CONFIG.md)、[日志](../../logx/README.md)、[HTTP 客户端](../../httpc/README.md)、[copyx](../../COPY.md)。

examples/developerTools/config.yaml

@@ -0,0 +1,7 @@
+# Validates database settings without connecting in this demonstration.
+database:
+  port: "${DEMO_DB_PORT:-3306}"
+server:
+  log:
+    level: "${DEMO_LOG_LEVEL:-info}"
+    timeZone: "${DEMO_LOG_TIME_ZONE:-Asia/Shanghai}"

examples/developerTools/main.go

@@ -0,0 +1,104 @@
+// Run from the framework root with: go run ./examples/developerTools
+package main
+
+import (
+	"context"
+	"errors"
+	"flag"
+	"fmt"
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"strconv"
+	_ "time/tzdata" // This example embeds zones; production builds can use -tags timetzdata.
+
+	"git.yuntuo.hk/k2safe/go-omni/config"
+	"git.yuntuo.hk/k2safe/go-omni/copyx"
+	mysql "git.yuntuo.hk/k2safe/go-omni/database/mysql"
+	"git.yuntuo.hk/k2safe/go-omni/httpc"
+	"git.yuntuo.hk/k2safe/go-omni/logx"
+)
+
+type Config struct {
+	Database mysql.Config  `json:"database"`
+	Server   config.Config `json:"server"`
+}
+
+func Default() Config {
+	c := config.Default()
+	c.Log.Output = "stdout"
+	return Config{Database: mysql.DefaultConfig(), Server: c}
+}
+func (c Config) Validate() error {
+	if err := c.Database.Validate(); err != nil {
+		return config.AtField("database", err)
+	}
+	return config.AtField("server", c.Server.Validate())
+}
+
+type Input struct{ Values []TextValue }
+type TextValue struct{ Number string }
+type Result struct{ Values []NumberValue }
+type NumberValue struct{ Number int }
+
+func run(path string) error {
+	cfg, err := config.LoadProject(path, Default())
+	if err != nil {
+		return err
+	}
+	// Validation only: this example never opens a database.
+	logger, err := logx.New(cfg.Server.Log)
+	if err != nil {
+		return err
+	}
+	defer logger.Close()
+	logger.InfoContext(context.Background(), "instance time zone", "configuredZone", cfg.Server.Log.TimeZone)
+	if err := copyx.Check[Input, Result](); !errors.Is(err, copyx.ErrType) {
+		return fmt.Errorf("expected a type mismatch, got %v", err)
+	}
+	// Explicit Go converter owns the number conversion; no JSON mapping file.
+	options := []copyx.Option{copyx.WithConverter(strconv.Atoi)}
+	if err := copyx.Check[Input, Result](options...); err != nil {
+		return err
+	}
+	var output Result
+	if err := copyx.Copy(&output, Input{Values: []TextValue{{Number: "42"}}}, options...); err != nil {
+		return err
+	}
+	fmt.Printf("type check and copy succeeded: %d\n", output.Values[0].Number)
+
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path == "/created" {
+			w.WriteHeader(http.StatusCreated)
+		}
+		io.WriteString(w, `{"value":"example"}`)
+	}))
+	defer server.Close()
+	client, err := httpc.New(httpc.Config{DisableLogging: true})
+	if err != nil {
+		return err
+	}
+	defer client.Close()
+	var reply struct {
+		Value string `json:"value"`
+	}
+	if err := client.JSON(context.Background(), http.MethodGet, server.URL, nil, &reply, httpc.WithSuccessStatuses(http.StatusOK)); err != nil {
+		return err
+	}
+	err = client.JSON(context.Background(), http.MethodGet, server.URL+"/created", nil, &reply, httpc.WithSuccessStatuses(http.StatusOK))
+	var status *httpc.StatusError
+	if !errors.As(err, &status) || status.StatusCode != http.StatusCreated {
+		return fmt.Errorf("expected status rejection, got %v", err)
+	}
+	fmt.Println("strict JSON: 200 accepted, 201 rejected")
+	return nil
+}
+func main() {
+	path := flag.String("config", "examples/developerTools/config.yaml", "selected configuration file")
+	flag.Parse()
+	if err := run(*path); err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+}

examples/managedService/go.mod

@@ -2,7 +2,7 @@ module example.com/managed
 
 go 1.22.0
 
-require git.yuntuo.hk/k2safe/go-omni v0.22.0-preview
+require git.yuntuo.hk/k2safe/go-omni v0.23.0-preview
 
 require (
 	github.com/gabriel-vasile/mimetype v1.4.3 // indirect

examples/userService/go.mod

@@ -3,7 +3,7 @@ module example.com/userService
 go 1.22.0
 
 require (
-	git.yuntuo.hk/k2safe/go-omni v0.22.0-preview
+	git.yuntuo.hk/k2safe/go-omni v0.23.0-preview
 	github.com/go-sql-driver/mysql v1.9.3
 )
 

httpc/README.md

@@ -85,7 +85,20 @@ err := client.JSON(ctx, "POST", endpoint, input, &output,
 - Host、Content-Length、Transfer-Encoding、Trailer 属于请求目标/分帧控制，请用标准 Request 配合 Do；JSON 选项中不允许伪装成普通头。
 - `WithMaxResponseBytes` 是本次 JSON 的正数限额，不修改 Client 默认值，不改变 Do 的流式语义。
 
-JSON 自动关闭响应体。仅 2xx 解码；空成功响应（例如 204）保留 output 原值。非空响应使用标准 json.Unmarshal，拒绝多个 JSON 文档，类型错误保留 Go 的错误信息与行为。
+`WithSuccessStatuses(200)` 限制本次调用只接受 200；可传多个，例如 `(200, 201)`。不传时保持全部 2xx。列表必须非空且每项位于 200–299，重复项允许；后一个状态选项替换前一个列表。构造选项时快照，之后修改原 slice 不影响请求，并发复用不串配置。
+
+```go
+err := client.JSON(ctx, http.MethodGet, endpoint, nil, &result,
+    httpc.WithHeader("Authorization", credential),
+    httpc.WithSuccessStatuses(http.StatusOK),
+)
+var status *httpc.StatusError
+if errors.As(err, &status) { /* status.StatusCode 是实际收到的状态 */ }
+```
+
+未允许的状态（包括 201/204）返回 StatusError，不解码、不改变 output；仍关闭响应体、按原有时间/大小预算回收连接，不读取无限错误正文。状态选项不会增加重试，原有 Do 重试规则保留。它只限制 HTTP 状态，不保证响应非空或业务字段完整，业务仍校验自身协议。严格状态、关闭与连接复用见 [示例](../examples/developerTools/README.md)。
+
+JSON 自动关闭响应体。默认仅 2xx 解码；指定成功状态列表时只解码列表内状态；空成功响应（例如 204）保留 output 原值。非空响应使用标准 json.Unmarshal，拒绝多个 JSON 文档，类型错误保留 Go 的错误信息与行为。
 
 `output == nil` 按限额流式丢弃成功响应，不把整个 body 读进内存，也不检查 JSON 语法。响应限额按实际读取的 body 计算；标准库自动 gzip 解压后仍受上限约束。input 会先 json.Marshal 到内存，大文件上传不适合用 JSON helper。
 

httpc/config.go

@@ -2,7 +2,6 @@ package httpc
 
 import (
 	"errors"
-	"fmt"
 	"net"
 	"net/http"
 	"net/url"
@@ -10,6 +9,8 @@ import (
 	"strconv"
 	"strings"
 	"time"
+
+	"git.yuntuo.hk/k2safe/go-omni/internal/configdiag"
 )
 
 // ProxyMode controls the owned transport's proxy selection. Empty preserves
@@ -66,17 +67,23 @@ func normalizeConfig(cfg Config) (Config, error) {
 		{"responseHeaderTimeout", cfg.ResponseHeaderTimeout}, {"expectContinueTimeout", cfg.ExpectContinueTimeout}, {"idleConnTimeout", cfg.IdleConnTimeout},
 	} {
 		if field.value < 0 {
-			return Config{}, fmt.Errorf("httpc: %s must not be negative", field.name)
+			return Config{}, configdiag.New(field.name, "must be nonnegative")
 		}
 	}
 	if cfg.MaxRetries < 0 || cfg.MaxRetries > 5 {
-		return Config{}, errors.New("httpc: maxRetries must be 0..5")
+		return Config{}, configdiag.New("maxRetries", "must be between 0 and 5")
 	}
-	if cfg.MaxConnsPerHost < 0 || cfg.MaxConnsPerHost > 65536 || cfg.MaxIdleConnsPerHost < 0 || cfg.MaxIdleConnsPerHost > 65536 || cfg.MaxIdleConns < 0 || cfg.MaxIdleConns > 131072 {
+	for _, f := range []struct {
-		return Config{}, errors.New("httpc: invalid connection pool limits")
+		name       string
+		value, max int
+	}{{"maxConnsPerHost", cfg.MaxConnsPerHost, 65536}, {"maxIdleConnsPerHost", cfg.MaxIdleConnsPerHost, 65536}, {"maxIdleConns", cfg.MaxIdleConns, 131072}} {
+		if f.value < 0 || f.value > f.max {
+			return Config{}, configdiag.New(f.name, "must be between 0 and "+strconv.Itoa(f.max))
 		}
+	}
+
 	if cfg.MaxResponseBytes < 0 || cfg.MaxResponseBytes > maxResponseBytes {
-		return Config{}, errors.New("httpc: maxResponseBytes must be 0..1 GiB")
+		return Config{}, configdiag.New("maxResponseBytes", "must be between 0 and 1 GiB")
 	}
 	if _, err := proxyFunction(cfg.Proxy); err != nil {
 		return Config{}, err
@@ -86,11 +93,11 @@ func normalizeConfig(cfg Config) (Config, error) {
 		switch value.Kind() {
 		case reflect.Pointer, reflect.Map, reflect.Func, reflect.Slice, reflect.Interface, reflect.Chan:
 			if value.IsNil() {
-				return Config{}, errors.New("httpc: nil Transport")
+				return Config{}, configdiag.New("transport", "must not be a typed nil")
 			}
 		}
 		if cfg.hasTransportOptions() {
-			return Config{}, errors.New("httpc: Transport cannot be combined with proxy, dial, TLS or connection pool options; configure the borrowed transport directly")
+			return Config{}, configdiag.New("transport", "cannot be combined with proxy, dial, TLS or connection pool options; configure the borrowed transport directly")
 		}
 	}
 	if cfg.Timeout == 0 {
@@ -103,7 +110,7 @@ func normalizeConfig(cfg Config) (Config, error) {
 		cfg.MaxBackoff = 2 * time.Second
 	}
 	if cfg.Backoff > cfg.MaxBackoff {
-		return Config{}, errors.New("httpc: backoff exceeds maxBackoff")
+		return Config{}, configdiag.New("backoff", "must not exceed maxBackoff")
 	}
 	if cfg.MaxConnsPerHost == 0 {
 		cfg.MaxConnsPerHost = 64
@@ -124,7 +131,7 @@ func (c Config) hasTransportOptions() bool {
 }
 func proxyFunction(c ProxyConfig) (func(*http.Request) (*url.URL, error), error) {
 	if c.Mode != ProxyURL && c.URL != "" {
-		return nil, errors.New("httpc: proxy URL requires mode url")
+		return nil, configdiag.New("proxy.mode", "must be url when a URL is configured")
 	}
 	switch c.Mode {
 	case "":
@@ -136,27 +143,27 @@ func proxyFunction(c ProxyConfig) (func(*http.Request) (*url.URL, error), error)
 	case ProxyURL:
 		u, err := url.Parse(c.URL)
 		if err != nil || u == nil || u.Hostname() == "" || u.Opaque != "" || u.RawQuery != "" || u.ForceQuery || u.Fragment != "" || (u.Path != "" && u.Path != "/") {
-			return nil, errors.New("httpc: proxy URL must be an absolute proxy origin without path, query or fragment")
+			return nil, configdiag.New("proxy.url", "must be an absolute proxy origin without path, query or fragment")
 		}
 		switch u.Scheme {
 		case "http", "https", "socks5", "socks5h":
 		default:
-			return nil, errors.New("httpc: proxy scheme must be http, https, socks5 or socks5h")
+			return nil, configdiag.New("proxy.url", "scheme must be http, https, socks5 or socks5h")
 		}
 		if strings.HasSuffix(u.Host, ":") {
-			return nil, errors.New("httpc: proxy port must be 1..65535")
+			return nil, configdiag.New("proxy.url", "port must be between 1 and 65535")
 		}
 		if port := u.Port(); port != "" {
 			n, e := strconv.Atoi(port)
 			if e != nil || n < 1 || n > 65535 {
-				return nil, errors.New("httpc: proxy port must be 1..65535")
+				return nil, configdiag.New("proxy.url", "port must be between 1 and 65535")
 			}
 		}
 		u.Path = ""
 		u.RawPath = ""
 		return http.ProxyURL(u), nil
 	default:
-		return nil, errors.New("httpc: proxy mode must be environment, direct or url")
+		return nil, configdiag.New("proxy.mode", "must be environment, direct or url")
 	}
 }
 func ownedTransport(cfg Config) (*http.Transport, error) {

httpc/json.go

@@ -11,7 +11,7 @@ import (
 )
 
 // JSON bounds response memory, closes the body, and decodes only 2xx responses.
-// Optional headers/limits belong to this call and never alter the client.
+// Optional headers/limits/success statuses belong to this call and never alter the client.
 // output=nil discards a bounded stream; it does not buffer or validate JSON.
 // Empty successful bodies leave output unchanged. StatusError contains no body.
 func (c *Client) JSON(ctx context.Context, method, url string, input, output any, options ...RequestOption) error {
@@ -57,7 +57,7 @@ func (c *Client) JSON(ctx context.Context, method, url string, input, output any
 		return err
 	}
 	defer response.Body.Close()
-	if response.StatusCode < 200 || response.StatusCode >= 300 {
+	if !settings.accepts(response.StatusCode) {
 		drainStatusBody(response, settings.maxResponseBytes)
 		return &StatusError{StatusCode: response.StatusCode}
 	}

httpc/request.go

@@ -9,6 +9,8 @@ import (
 type requestOptions struct {
 	headers          http.Header
 	maxResponseBytes int64
+	successStatuses  [2]uint64
+	restrictStatus   bool
 }
 
 // RequestOption applies only to one JSON call. Returned options can be reused
@@ -97,3 +99,41 @@ func checkHeader(name string, values []string) error {
 	}
 	return nil
 }
+
+// WithSuccessStatuses restricts this JSON call to the listed 2xx statuses.
+// Omission keeps all 2xx successful. Empty/out-of-range lists are rejected before
+// sending a request. Options snapshot their input and can be reused concurrently.
+// The policy does not add retries or validate application-specific JSON fields.
+func WithSuccessStatuses(statuses ...int) RequestOption {
+	var accepted [2]uint64
+	var err error
+	if len(statuses) == 0 {
+		err = errors.New("httpc: at least one success status is required")
+	}
+	for _, status := range statuses {
+		if status < 200 || status >= 300 {
+			err = errors.New("httpc: success statuses must be between 200 and 299")
+			break
+		}
+		bit := status - 200
+		accepted[bit/64] |= uint64(1) << uint(bit%64)
+	}
+	return func(o *requestOptions) error {
+		if err != nil {
+			return err
+		}
+		o.successStatuses = accepted
+		o.restrictStatus = true
+		return nil
+	}
+}
+func (o requestOptions) accepts(status int) bool {
+	if status < 200 || status >= 300 {
+		return false
+	}
+	if !o.restrictStatus {
+		return true
+	}
+	bit := status - 200
+	return o.successStatuses[bit/64]&(uint64(1)<<uint(bit%64)) != 0
+}

httpc/status_test.go

@@ -0,0 +1,174 @@
+package httpc
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"io"
+	"net"
+	"net/http"
+	"net/http/httptest"
+	"strconv"
+	"strings"
+	"sync"
+	"sync/atomic"
+	"testing"
+	"time"
+)
+
+func TestJSONSuccessStatuses(t *testing.T) {
+	for _, status := range []int{200, 201, 204, 264, 299, 400} {
+		t.Run(strconv.Itoa(status), func(t *testing.T) {
+			var calls atomic.Int32
+			body := &trackedBody{Reader: strings.NewReader(`{"value":2}`)}
+			c := testClient(t, Config{MaxRetries: 5, Transport: roundTripperFunc(func(r *http.Request) (*http.Response, error) {
+				calls.Add(1)
+				return &http.Response{StatusCode: status, Body: body, ContentLength: 11, Header: make(http.Header), Request: r}, nil
+			})})
+			out := struct {
+				Value int `json:"value"`
+			}{Value: 1}
+			err := c.JSON(context.Background(), "GET", "http://example.invalid", nil, &out, WithSuccessStatuses(200))
+			if status == 200 {
+				if err != nil || out.Value != 2 {
+					t.Fatal(err, out)
+				}
+			} else {
+				var rejected *StatusError
+				if !errors.As(err, &rejected) || rejected.StatusCode != status || out.Value != 1 {
+					t.Fatal(err, out)
+				}
+				if strings.Contains(err.Error(), "value") {
+					t.Fatal("status error exposed body")
+				}
+			}
+			if !body.closed || calls.Load() != 1 {
+				t.Fatal("not closed or unexpected retry", calls.Load())
+			}
+			// Unconfigured calls continue to accept every 2xx.
+			c2 := testClient(t, Config{Transport: benchmarkTransport{`{}`, status}})
+			err = c2.JSON(context.Background(), "GET", "http://example.invalid", nil, nil)
+			if (err == nil) != (status >= 200 && status < 300) {
+				t.Fatal(err)
+			}
+			if status >= 200 && status < 300 {
+				if err := c2.JSON(context.Background(), "GET", "http://example.invalid", nil, nil, WithSuccessStatuses(status, status)); err != nil {
+					t.Fatal(err)
+				}
+			}
+		})
+	}
+	var calls atomic.Int32
+	c := testClient(t, Config{Transport: roundTripperFunc(func(r *http.Request) (*http.Response, error) {
+		calls.Add(1)
+		return benchmarkTransport{`{}`, 200}.RoundTrip(r)
+	})})
+	for _, option := range []RequestOption{WithSuccessStatuses(), WithSuccessStatuses(199), WithSuccessStatuses(300), WithSuccessStatuses(-1), WithSuccessStatuses(200, 500)} {
+		if err := c.JSON(context.Background(), "GET", "http://example.invalid", nil, nil, option); err == nil {
+			t.Fatal("invalid policy accepted")
+		}
+	}
+	if calls.Load() != 0 {
+		t.Fatal("invalid policy reached transport")
+	}
+}
+func TestJSONSuccessStatusConcurrentOptions(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		n, _ := strconv.Atoi(r.URL.Query().Get("status"))
+		w.WriteHeader(n)
+		if n != 204 {
+			io.WriteString(w, `{}`)
+		}
+	}))
+	defer srv.Close()
+	c := testClient(t, Config{})
+	statuses := []int{200, 201}
+	option := WithSuccessStatuses(statuses...)
+	statuses[0] = 204
+	var wg sync.WaitGroup
+	for i := 0; i < 30; i++ {
+		wg.Add(1)
+		go func(i int) {
+			defer wg.Done()
+			status := 200 + i%2
+			err := c.JSON(context.Background(), "GET", fmt.Sprintf("%s?status=%d", srv.URL, status), nil, nil, option)
+			if err != nil {
+				t.Error(err)
+			}
+			err = c.JSON(context.Background(), "GET", srv.URL+"?status=204", nil, nil, option)
+			var rejected *StatusError
+			if !errors.As(err, &rejected) || rejected.StatusCode != 204 {
+				t.Error(err)
+			}
+		}(i)
+	}
+	wg.Wait()
+	// Last explicit policy wins; another call's policy must not leak.
+	if err := c.JSON(context.Background(), "GET", srv.URL+"?status=204", nil, nil, option, WithSuccessStatuses(204)); err != nil {
+		t.Fatal(err)
+	}
+	if err := c.JSON(context.Background(), "GET", srv.URL+"?status=204", nil, nil); err != nil {
+		t.Fatal(err)
+	}
+}
+func TestJSONRejectedSuccessBodyRecovery(t *testing.T) {
+	var connections atomic.Int32
+	srv := httptest.NewUnstartedServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(201)
+		if r.URL.Path == "/stream" {
+			w.(http.Flusher).Flush()
+			<-r.Context().Done()
+			return
+		}
+		io.WriteString(w, "private response")
+	}))
+	srv.Config.ConnState = func(_ net.Conn, s http.ConnState) {
+		if s == http.StateNew {
+			connections.Add(1)
+		}
+	}
+	srv.Start()
+	defer srv.Close()
+	c := testClient(t, Config{Timeout: time.Second})
+	for i := 0; i < 5; i++ {
+		err := c.JSON(context.Background(), "GET", srv.URL, nil, nil, WithSuccessStatuses(200))
+		var status *StatusError
+		if !errors.As(err, &status) || status.StatusCode != 201 {
+			t.Fatal(err)
+		}
+	}
+	if connections.Load() != 1 {
+		t.Fatal("small rejected bodies lost keep-alive", connections.Load())
+	}
+	start := time.Now()
+	err := c.JSON(context.Background(), "GET", srv.URL+"/stream", nil, nil, WithSuccessStatuses(200))
+	var status *StatusError
+	if !errors.As(err, &status) || status.StatusCode != 201 || time.Since(start) > 500*time.Millisecond {
+		t.Fatal("waited for rejected unbounded body", err)
+	}
+	if err := c.JSON(context.Background(), "GET", srv.URL, nil, nil, WithSuccessStatuses(201), WithMaxResponseBytes(4)); !errors.Is(err, ErrResponseTooLarge) {
+		t.Fatal("accepted body bypassed size limit", err)
+	}
+}
+func BenchmarkJSONSuccessStatus(b *testing.B) {
+	for _, restrict := range []bool{false, true} {
+		b.Run(strconv.FormatBool(restrict), func(b *testing.B) {
+			c, _ := New(Config{Transport: benchmarkTransport{`{"id":1}`, 200}, DisableLogging: true})
+			defer c.Close()
+			var options []RequestOption
+			if restrict {
+				options = []RequestOption{WithSuccessStatuses(200)}
+			}
+			var out struct {
+				ID int `json:"id"`
+			}
+			b.ReportAllocs()
+			b.ResetTimer()
+			for i := 0; i < b.N; i++ {
+				if err := c.JSON(context.Background(), "GET", "http://example.invalid", nil, &out, options...); err != nil {
+					b.Fatal(err)
+				}
+			}
+		})
+	}
+}

internal/configdiag/error.go

@@ -0,0 +1,34 @@
+// Package configdiag carries value-free field diagnostics between framework
+// modules without making them depend on the application's config package.
+package configdiag
+
+import "errors"
+
+type Error struct {
+	Field, Reason string
+	cause         error
+}
+
+func (e *Error) Error() string       { return e.Field + ": " + e.Reason }
+func (e *Error) Unwrap() error       { return e.cause }
+func New(field, reason string) error { return &Error{Field: field, Reason: reason} }
+func Wrap(field, reason string, cause error) error {
+	return &Error{Field: field, Reason: reason, cause: cause}
+}
+func At(prefix string, err error) error {
+	if err == nil {
+		return nil
+	}
+	var d *Error
+	if errors.As(err, &d) {
+		field := prefix
+		if d.Field != "" {
+			if field != "" {
+				field += "."
+			}
+			field += d.Field
+		}
+		return Wrap(field, d.Reason, err)
+	}
+	return Wrap(prefix, "validation failed", err)
+}

lifecycle/phases.go

@@ -7,6 +7,8 @@ import (
 	"strings"
 	"time"
 	"unicode"
+
+	"git.yuntuo.hk/k2safe/go-omni/internal/configdiag"
 )
 
 // ErrResourcesRetained means background quiescence could not be established.
@@ -24,8 +26,13 @@ func DefaultShutdownConfig() ShutdownConfig {
 	return ShutdownConfig{StopTimeout: 5 * time.Second, DrainTimeout: 10 * time.Second, CancelTimeout: 5 * time.Second}
 }
 func (c ShutdownConfig) Validate() error {
-	if c.StopTimeout < 0 || c.DrainTimeout < 0 || c.CancelTimeout < 0 {
+	for _, f := range []struct {
-		return errors.New("lifecycle: shutdown timeouts must be nonnegative")
+		name  string
+		value time.Duration
+	}{{"stopTimeout", c.StopTimeout}, {"drainTimeout", c.DrainTimeout}, {"cancelTimeout", c.CancelTimeout}} {
+		if f.value < 0 {
+			return configdiag.New(f.name, "must be nonnegative")
+		}
 	}
 	return nil
 }

logx/README.md

@@ -14,6 +14,20 @@ logger.InfoContext(ctx, "invoice.saved", "invoiceId", invoiceID)
 
 `Debug/Info/Warn/Error` 有包级和实例方法，也有带 Context 的方法。`requestId` 自动跟随 HTTP Context；接入 telemetry 后可带 `traceId`。不要在 Service 中改用 `context.Background()`，否则会丢失取消信号和关联字段。
 
+## 实例时区
+
+```yaml
+server:
+  log:
+    timeZone: Asia/Shanghai
+```
+
+手写项目使用 `logx.New(logx.Config{TimeZone: "Asia/Shanghai"})`。配置名称采用 IANA 名称或 UTC；空字符串保持已有时间戳行为。无效名称在打开文件之前报 `timeZone` 的安全错误；统一加载后路径为 `server.log.timeZone`。
+
+时区在创建 Logger 时解析，记录输出不重复加载；JSON/text、With/WithGroup 子日志和 Standard 适配器均继承该实例时区。不同 Logger 可同时使用不同地区，不修改全局 time.Local。仅转换记录时间戳，业务 `time.Time` 属性保留原时区；夏令时由时区数据处理。时区变更需要重建 Logger，现有热加载仍只支持级别。
+
+使用 Go 标准库查找时区。极简镜像需提供时区数据，或执行 `go build -tags timetzdata .` 将标准库时区数据内置（增加约 450 KB）；也可由手写 main 导入 time/tzdata。logx 自身不强制内置数据，不引入第三方依赖。脱敏、日志级别和文件所有权语义保持不变。可运行例子：[developerTools](../examples/developerTools/README.md)。
+
 ## 文件轮转
 
 ```go
@@ -53,7 +67,7 @@ application := omni.New(
 )
 ```
 
-`WithSlowRequestThreshold` 同时开启访问日志，0 禁用慢请求识别。也可以在 JSON/YAML 中配 `enableLogger: true`、`slowRequestThreshold: "500ms"`，或使用 `GO_OMNI_SLOW_REQUEST_THRESHOLD` 配合 `GO_OMNI_ENABLE_LOGGER=true`。
+`WithSlowRequestThreshold` 同时开启访问日志，0 禁用慢请求识别。也可以在配置文件的 server 下配 `enableLogger: true`、`slowRequestThreshold: "500ms"`。需要环境变量控制时，显式写 `slowRequestThreshold: "${SLOW_REQUEST_THRESHOLD:-500ms}"`；没有文件引用时不会读取同名环境变量。
 
 每个请求记录一条 `http.request`：方法、路径、匹配路由、实际状态码、耗时、客户端 IP 和关联字段。正常请求 INFO，超过阈值 WARN（`slow: true`），5xx ERROR；返回的 error 会记录到结构化字段。计时覆盖 Handler 调用，不包含框架之外的代理排队，也不自动计入 Handler 返回后继续写入的自管流。
 

logx/adapters.go

@@ -2,27 +2,33 @@ package logx
 
 import (
 	"context"
-	"errors"
 	"log"
 	"log/slog"
 	"strings"
+	"time"
+
+	"git.yuntuo.hk/k2safe/go-omni/internal/configdiag"
 )
 
 // Validate checks configuration without opening files or creating resources.
-func (c Config) Validate() error {
+func (c Config) Validate() error { _, err := c.validate(); return err }
+func (c Config) validate() (*time.Location, error) {
 	c = normalizeConfig(c)
 	if _, err := parseLevel(c.Level); err != nil {
-		return errors.New("logx: invalid level")
+		return nil, configdiag.New("level", "must be debug, info, warn, warning or error")
 	}
 	if c.Format != "json" && c.Format != "text" {
-		return errors.New("logx: format must be json or text")
+		return nil, configdiag.New("format", "must be json or text")
 	}
 	switch c.Output {
 	case "stdout", "stderr", "discard", "none":
 	default:
-		return errors.New("logx: invalid output")
+		return nil, configdiag.New("output", "must be stdout, stderr, discard or none")
 	}
-	return c.Rotation.validate(c)
+	if err := c.Rotation.validate(c); err != nil {
+		return nil, err
+	}
+	return logLocation(c.TimeZone)
 }
 
 type loggerContextKey struct{}

logx/logx.go

@@ -22,6 +22,7 @@ import (
 // standard stream. File takes precedence over Output and appends to the named
 // file.
 type Config struct {
+	TimeZone    string         `json:"timeZone"` // Empty retains existing timestamp behavior.
 	Level       string         `json:"level"`
 	Format      string         `json:"format"`
 	Output      string         `json:"output"`
@@ -73,7 +74,8 @@ func init() {
 // call Close when the process is shutting down.
 func New(cfg Config) (*Logger, error) {
 	cfg = normalizeConfig(cfg)
-	if err := cfg.Validate(); err != nil {
+	location, err := cfg.validate()
+	if err != nil {
 		return nil, err
 	}
 	level, err := parseLevel(cfg.Level)
@@ -95,6 +97,9 @@ func New(cfg Config) (*Logger, error) {
 	} else {
 		handler = slog.NewJSONHandler(writer, opts)
 	}
+	if location != nil {
+		handler = zoneHandler{Handler: handler, location: location}
+	}
 	logger := slog.New(handler)
 	if cfg.Service != "" {
 		logger = logger.With("service", cfg.Service)

logx/rotation.go

@@ -1,13 +1,15 @@
 package logx
 
 import (
-	"errors"
+	"fmt"
 	"io"
 	"os"
 	"path/filepath"
 	"sync"
 
 	"gopkg.in/natefinch/lumberjack.v2"
+
+	"git.yuntuo.hk/k2safe/go-omni/internal/configdiag"
 )
 
 // RotationConfig opts a file logger into size-based rotation. Zero limits use
@@ -21,12 +23,21 @@ type RotationConfig struct {
 }
 
 func (r RotationConfig) validate(cfg Config) error {
-	if r.MaxSizeMB < 0 || r.MaxSizeMB > 1024*1024 || r.MaxBackups < 0 || r.MaxBackups > 10000 || r.MaxAgeDays < 0 || r.MaxAgeDays > 36500 {
+	for _, f := range []struct {
-		return errors.New("logx: invalid rotation limits")
+		name       string
+		value, max int
+	}{{"maxSizeMb", r.MaxSizeMB, 1024 * 1024}, {"maxBackups", r.MaxBackups, 10000}, {"maxAgeDays", r.MaxAgeDays, 36500}} {
+		if f.value < 0 || f.value > f.max {
+			return configdiag.New("rotation."+f.name, fmt.Sprintf("must be between 0 and %d", f.max))
 		}
-	if r.Enabled && (cfg.File == "" || cfg.Writer != nil) {
-		return errors.New("logx: rotation requires a file and no custom writer")
 	}
+	if r.Enabled && cfg.File == "" {
+		return configdiag.New("file", "is required when rotation is enabled")
+	}
+	if r.Enabled && cfg.Writer != nil {
+		return configdiag.New("rotation.enabled", "cannot be enabled with a custom writer")
+	}
+
 	return nil
 }
 

logx/timeZone.go

@@ -0,0 +1,40 @@
+package logx
+
+import (
+	"context"
+	"log/slog"
+	"time"
+
+	"git.yuntuo.hk/k2safe/go-omni/internal/configdiag"
+)
+
+func logLocation(name string) (*time.Location, error) {
+	if name == "" {
+		return nil, nil
+	}
+	location, err := time.LoadLocation(name)
+	if err != nil {
+		return nil, configdiag.Wrap("timeZone", "must be an available IANA time zone or UTC", err)
+	}
+	return location, nil
+}
+
+// Convert only the record timestamp. User time.Time attributes retain their
+// original locations; child loggers inherit this instance's location.
+type zoneHandler struct {
+	slog.Handler
+	location *time.Location
+}
+
+func (h zoneHandler) Handle(ctx context.Context, r slog.Record) error {
+	if !r.Time.IsZero() {
+		r.Time = r.Time.In(h.location)
+	}
+	return h.Handler.Handle(ctx, r)
+}
+func (h zoneHandler) WithAttrs(attrs []slog.Attr) slog.Handler {
+	return zoneHandler{h.Handler.WithAttrs(attrs), h.location}
+}
+func (h zoneHandler) WithGroup(name string) slog.Handler {
+	return zoneHandler{h.Handler.WithGroup(name), h.location}
+}

logx/timeZone_test.go

@@ -0,0 +1,133 @@
+package logx
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"io"
+	"log/slog"
+	"os"
+	"path/filepath"
+	"strings"
+	"sync"
+	"testing"
+	"time"
+)
+
+func TestLoggerTimeZoneIsolation(t *testing.T) {
+	originalLocal := time.Local
+	stamp := time.Date(2026, 7, 1, 0, 0, 0, 123456000, time.UTC)
+	for _, format := range []string{"json", "text"} {
+		t.Run(format, func(t *testing.T) {
+			var a, b bytes.Buffer
+			sh, err := New(Config{TimeZone: "Asia/Shanghai", Format: format, Writer: &a})
+			if err != nil {
+				t.Fatal(err)
+			}
+			defer sh.Close()
+			utc, err := New(Config{TimeZone: "UTC", Format: format, Writer: &b})
+			if err != nil {
+				t.Fatal(err)
+			}
+			defer utc.Close()
+			r := slog.NewRecord(stamp, slog.LevelInfo, "timestamp", 0)
+			r.AddAttrs(slog.Time("eventTime", stamp), slog.String("password", "secret"))
+			if err := sh.With("service", "first").WithGroup("data").logger.Handler().Handle(context.Background(), r); err != nil {
+				t.Fatal(err)
+			}
+			if err := utc.logger.Handler().Handle(context.Background(), r); err != nil {
+				t.Fatal(err)
+			}
+			if !strings.Contains(a.String(), "08:00:00") || !strings.Contains(a.String(), "+08:00") || !strings.Contains(b.String(), "00:00:00") || strings.Contains(b.String(), "+08:00") {
+				t.Fatalf("a=%s b=%s", a.String(), b.String())
+			}
+			if strings.Contains(a.String(), "secret") || strings.Contains(b.String(), "secret") {
+				t.Fatal("redaction lost")
+			}
+			if format == "json" {
+				var out map[string]any
+				if err := json.Unmarshal(a.Bytes(), &out); err != nil {
+					t.Fatal(err)
+				}
+				if out["time"] != "2026-07-01T08:00:00.123456+08:00" || out["data"].(map[string]any)["eventTime"] != "2026-07-01T00:00:00.123456Z" {
+					t.Fatal(out)
+				}
+			}
+		})
+	}
+	if time.Local != originalLocal {
+		t.Fatal("global time.Local changed")
+	}
+}
+func TestLoggerTimeZoneValidationAndDST(t *testing.T) {
+	path := filepath.Join(t.TempDir(), "not-created", "app.log")
+	if _, err := New(Config{TimeZone: "Secret/Not_A_Zone", File: path}); err == nil || strings.Contains(err.Error(), "Secret") {
+		t.Fatal(err)
+	}
+	if _, err := os.Stat(filepath.Dir(path)); !os.IsNotExist(err) {
+		t.Fatal("invalid zone opened writer")
+	}
+	var out bytes.Buffer
+	l, err := New(Config{TimeZone: "America/New_York", Writer: &out})
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer l.Close()
+	for _, month := range []time.Month{time.January, time.July} {
+		r := slog.NewRecord(time.Date(2026, month, 1, 12, 0, 0, 0, time.UTC), slog.LevelInfo, "dst", 0)
+		if err := l.logger.Handler().Handle(context.Background(), r); err != nil {
+			t.Fatal(err)
+		}
+	}
+	if !strings.Contains(out.String(), "-05:00") || !strings.Contains(out.String(), "-04:00") {
+		t.Fatal(out.String())
+	}
+	// Explicit empty location preserves an incoming record's original zone.
+	out.Reset()
+	plain, _ := New(Config{Writer: &out})
+	defer plain.Close()
+	r := slog.NewRecord(time.Date(2026, 1, 1, 0, 0, 0, 0, time.FixedZone("original", 7200)), slog.LevelInfo, "unchanged", 0)
+	plain.logger.Handler().Handle(context.Background(), r)
+	if !strings.Contains(out.String(), "+02:00") {
+		t.Fatal(out.String())
+	}
+}
+func TestLoggerTimeZoneConcurrentChildren(t *testing.T) {
+	var out bytes.Buffer
+	l, err := New(Config{TimeZone: "Asia/Shanghai", Writer: &out})
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer l.Close()
+	var wg sync.WaitGroup
+	for i := 0; i < 20; i++ {
+		wg.Add(1)
+		go func(i int) {
+			defer wg.Done()
+			child := l.With("worker", i).WithGroup("event")
+			for n := 0; n < 10; n++ {
+				child.Standard(slog.LevelInfo).Print("message")
+			}
+		}(i)
+	}
+	wg.Wait()
+	if strings.Count(out.String(), "+08:00") != 200 {
+		t.Fatal("timestamps missing")
+	}
+}
+func BenchmarkLoggerTimeZone(b *testing.B) {
+	for _, zone := range []string{"", "UTC", "Asia/Shanghai"} {
+		b.Run(zone, func(b *testing.B) {
+			l, err := New(Config{TimeZone: zone, Writer: io.Discard})
+			if err != nil {
+				b.Fatal(err)
+			}
+			defer l.Close()
+			b.ReportAllocs()
+			b.ResetTimer()
+			for i := 0; i < b.N; i++ {
+				l.InfoContext(context.Background(), "benchmark", "count", 1)
+			}
+		})
+	}
+}

reports/developerToolsAcceptance.md

@@ -0,0 +1,60 @@
+# v0.23 接入工具验收（2026-09-26）
+
+本轮补齐通用配置诊断、JSON 成功状态限制、copyx 类型预检和实例日志时区；没有引入业务类型、映射配置或全局时区修改。
+
+## 回归
+
+- `GO_OMNI_SCAFFOLD_INTEGRATION=1 go test -race ./...`：48 个有测试的包通过，包含实际生成消费者、失败清理、后台收尾、错误目录和上传下载。
+- 最后调整 copyx 空集合检查和分配后，copyx/config/logx/httpc 的 race 复测通过。
+- Go 1.22.12 的 config/copyx/logx/httpc/database 测试通过；最后调整后前四个包复测通过。
+- `go vet ./...`、`go build ./...` 通过。
+- managedService 生成检查、race 和根目录构建通过；userService 的 race 通过。外部数据库测试没有提供连接配置时按原规则跳过。
+- developerTools 示例的默认配置、UTC、非法数据库端口、非法日志等级验证通过。错误非零退出，具体字段/原因可见，非法输入值未输出。
+- `FuzzClone` 最终运行 30 秒、4 worker，执行 3,925,833 次，通过（总时间 30.391 秒）。另有确定性的类型、nil、资源句柄和深拷贝隔离测试；fuzz 执行次数不代表形式化证明。
+
+| 能力 | 验收场景 |
+| --- | --- |
+| 字段诊断 | database.port/pool/tls、server.log.level/rotation/timeZone、HTTP 连接配置、后台关闭超时、请求策略定位具体字段；文件/环境名/行列保留；errors.Is/As 保留原因链；未知业务校验仍安全脱敏 |
+| JSON 成功状态 | 默认全部 2xx；指定 200；200..299 范围与空列表校验；选项快照/并发隔离；拒绝状态不改输出、不额外重试；响应体关闭；小响应复用连接；无限慢响应有界回收；成功响应大小限制保留 |
+| copyx 预检 | 无样本检查结构、数组/map、指针、递归类型、重命名/忽略/严格字段覆盖；converter 不执行；并发 Copier 选项隔离；空集合也拒绝确定类型错误；失败不修改目标 |
+| copyx 值语义 | nil 与空集合保持区别；允许原有合法的 nil 函数/空函数集合；实际非 nil 句柄仍拒绝；动态 interface 提示需要实际值或显式 converter；深拷贝 converter 返回原引用仍报错 |
+| 日志时区 | JSON/text/子日志/标准库日志；上海和 UTC 实例隔离；纽约夏令时；默认保留原时间；业务 time.Time 属性不改；脱敏保留；非法时区不创建文件；200 条并发日志 race 通过 |
+| 生成消费者 | 生成 Load 直接定位 server.log.level 和环境变量，校验先于依赖初始化；timeZone 直接绑定；重复生成/check 和业务文件保留通过 |
+
+## 性能
+
+Go 1.27.1、darwin/arm64、Apple M2 Max。无 race，每场景三轮、benchtime=200ms，表中取中位数。[基线原始结果](developerToolsBaseline.txt)、[当前原始结果](developerToolsBenchmark.txt)。
+
+| 场景 | 修改前 | 修改后 | 修改后分配 |
+| --- | ---: | ---: | ---: |
+| 结构转换，每次创建 Copier | 1221 ns | 1261 ns | 1120 B / 17 allocs（不变） |
+| 结构转换，复用 Copier | 733.4 ns | 719.1 ns | 168 B / 7 allocs（不变） |
+| 64 KiB 字节深拷贝 | 6067 ns | 5613 ns | 65768 B / 9 allocs（不变） |
+| HTTP 128 B JSON 解码 | 1374 ns | 1369 ns | 约 2348 B / 22 allocs |
+| HTTP 4 KiB JSON 解码 | 7020 ns | 7130 ns | 约 17085 B / 31 allocs |
+| HTTP 64 KiB JSON 解码 | 80622 ns | 80571 ns | 约 213924 B / 38 allocs |
+| HTTP Do | 664.2 ns | 664.5 ns | 1296 B / 17 allocs（不变） |
+
+新增功能的独立基准：
+
+- 复用 Copier，预检含嵌套切片和显式 converter 的类型：597.8 ns、32 B、3 次分配。每次显式 Check 检查类型，不在每个正常业务 Copy 前重复完整预检。
+- 同一简单 JSON 调用默认策略 1224 ns / 2345 B / 22 次分配，传成功状态选项 1249 ns / 2393 B / 23 次分配；此用例每次创建选项，应用也可复用选项。
+- 同一日志输出到 io.Discard：默认 851.5 ns、UTC 885.0 ns、上海 888.7 ns；均为 112 B / 3 次分配。时区解析只发生在初始化/校验阶段。
+
+这些是本机微基准，HTTP 使用模拟 Transport，日志使用 io.Discard，不代表实际网络或磁盘吞吐量；三轮测量有波动（64 KiB JSON 有一次较慢样本），不承诺固定性能比例。中途发现的普通拷贝额外分配已在最终测量前消除。
+
+复现命令：
+
+```sh
+go test ./copyx ./httpc ./logx -run '^$' -bench 'BenchmarkScenarios/(struct|bytes64KiB)|BenchmarkHTTPClient|BenchmarkTypeCheck|BenchmarkJSONSuccessStatus|BenchmarkLoggerTimeZone' -benchmem -benchtime=200ms -count=3
+go test ./copyx -run '^$' -fuzz '^FuzzClone$' -fuzztime=30s -parallel=4
+go run ./examples/developerTools
+```
+
+## 使用边界
+
+- 错误文本变得更具体，识别诊断应使用错误类型/字段。自定义业务校验继续通过 config.Invalid/AtField 声明安全原因。
+- 空集合中的确定类型错误现在会提前返回；需要调整实际类型或显式 converter。Check 不验证具体值、converter 成功性、nil 输入或深拷贝引用隔离，这些仍由实际 Copy 执行。
+- 成功状态选项只接受 2xx 子集，不改变 HTTP 重试策略；业务响应内容是否完整仍由项目协议校验。
+- 时区数据由运行环境提供；极简镜像可用 `go build -tags timetzdata .` 内置。logx 不强制引入约 450 KB 的时区数据库。
+- 本轮未修改接入项目业务代码，未连接业务数据库或使用远程服务器压测。仍需项目升级后的业务验收。

reports/developerToolsBaseline.txt

@@ -0,0 +1,42 @@
+goos: darwin
+goarch: arm64
+pkg: git.yuntuo.hk/k2safe/go-omni/copyx
+cpu: Apple M2 Max
+BenchmarkScenarios/struct/reusefalse-12         	  195284	      1218 ns/op	    1120 B/op	      17 allocs/op
+BenchmarkScenarios/struct/reusefalse-12         	  194980	      1227 ns/op	    1120 B/op	      17 allocs/op
+BenchmarkScenarios/struct/reusefalse-12         	  186867	      1221 ns/op	    1120 B/op	      17 allocs/op
+BenchmarkScenarios/struct/reusetrue-12          	  340254	       780.4 ns/op	     168 B/op	       7 allocs/op
+BenchmarkScenarios/struct/reusetrue-12          	  339192	       733.4 ns/op	     168 B/op	       7 allocs/op
+BenchmarkScenarios/struct/reusetrue-12          	  330416	       730.4 ns/op	     168 B/op	       7 allocs/op
+BenchmarkScenarios/bytes64KiB-12                	   37689	      6035 ns/op	10858.43 MB/s	   65768 B/op	       9 allocs/op
+BenchmarkScenarios/bytes64KiB-12                	   41599	      6222 ns/op	10533.71 MB/s	   65768 B/op	       9 allocs/op
+BenchmarkScenarios/bytes64KiB-12                	   38743	      6067 ns/op	10801.83 MB/s	   65768 B/op	       9 allocs/op
+PASS
+ok  	git.yuntuo.hk/k2safe/go-omni/copyx	2.867s
+goos: darwin
+goarch: arm64
+pkg: git.yuntuo.hk/k2safe/go-omni/httpc
+cpu: Apple M2 Max
+BenchmarkHTTPClient/128B/decode-12         	  152140	      1398 ns/op	    2348 B/op	      22 allocs/op
+BenchmarkHTTPClient/128B/decode-12         	  181575	      1372 ns/op	    2348 B/op	      22 allocs/op
+BenchmarkHTTPClient/128B/decode-12         	  177343	      1374 ns/op	    2348 B/op	      22 allocs/op
+BenchmarkHTTPClient/128B/discard-12        	  235099	       997.7 ns/op	    1836 B/op	      21 allocs/op
+BenchmarkHTTPClient/128B/discard-12        	  234962	      1012 ns/op	    1836 B/op	      21 allocs/op
+BenchmarkHTTPClient/128B/discard-12        	  231510	       990.5 ns/op	    1836 B/op	      21 allocs/op
+BenchmarkHTTPClient/4KiB/decode-12         	   34695	      7010 ns/op	   17086 B/op	      31 allocs/op
+BenchmarkHTTPClient/4KiB/decode-12         	   34256	      7020 ns/op	   17084 B/op	      31 allocs/op
+BenchmarkHTTPClient/4KiB/decode-12         	   34084	      7043 ns/op	   17087 B/op	      31 allocs/op
+BenchmarkHTTPClient/4KiB/discard-12        	  223120	      1058 ns/op	    1836 B/op	      21 allocs/op
+BenchmarkHTTPClient/4KiB/discard-12        	  205618	      1067 ns/op	    1836 B/op	      21 allocs/op
+BenchmarkHTTPClient/4KiB/discard-12        	  224156	      1079 ns/op	    1836 B/op	      21 allocs/op
+BenchmarkHTTPClient/64KiB/decode-12        	    3010	     80622 ns/op	  213909 B/op	      38 allocs/op
+BenchmarkHTTPClient/64KiB/decode-12        	    3122	     81358 ns/op	  213949 B/op	      38 allocs/op
+BenchmarkHTTPClient/64KiB/decode-12        	    2982	     80473 ns/op	  213901 B/op	      38 allocs/op
+BenchmarkHTTPClient/64KiB/discard-12       	  110815	      2154 ns/op	    1836 B/op	      21 allocs/op
+BenchmarkHTTPClient/64KiB/discard-12       	  112252	      2107 ns/op	    1836 B/op	      21 allocs/op
+BenchmarkHTTPClient/64KiB/discard-12       	  114548	      2094 ns/op	    1835 B/op	      21 allocs/op
+BenchmarkHTTPClient/Do-12                  	  366976	       662.1 ns/op	    1296 B/op	      17 allocs/op
+BenchmarkHTTPClient/Do-12                  	  351373	       664.2 ns/op	    1296 B/op	      17 allocs/op
+BenchmarkHTTPClient/Do-12                  	  335104	       679.0 ns/op	    1296 B/op	      17 allocs/op
+PASS
+ok  	git.yuntuo.hk/k2safe/go-omni/httpc	5.889s

reports/developerToolsBenchmark.txt

@@ -0,0 +1,66 @@
+goos: darwin
+goarch: arm64
+pkg: git.yuntuo.hk/k2safe/go-omni/copyx
+cpu: Apple M2 Max
+BenchmarkScenarios/struct/reusefalse-12         	  185918	      1261 ns/op	    1120 B/op	      17 allocs/op
+BenchmarkScenarios/struct/reusefalse-12         	  191277	      1254 ns/op	    1120 B/op	      17 allocs/op
+BenchmarkScenarios/struct/reusefalse-12         	  192738	      1267 ns/op	    1120 B/op	      17 allocs/op
+BenchmarkScenarios/struct/reusetrue-12          	  336856	       716.9 ns/op	     168 B/op	       7 allocs/op
+BenchmarkScenarios/struct/reusetrue-12          	  333480	       719.1 ns/op	     168 B/op	       7 allocs/op
+BenchmarkScenarios/struct/reusetrue-12          	  338338	       753.9 ns/op	     168 B/op	       7 allocs/op
+BenchmarkScenarios/bytes64KiB-12                	   43203	      5588 ns/op	11727.22 MB/s	   65768 B/op	       9 allocs/op
+BenchmarkScenarios/bytes64KiB-12                	   43075	      5613 ns/op	11675.18 MB/s	   65768 B/op	       9 allocs/op
+BenchmarkScenarios/bytes64KiB-12                	   42343	      5646 ns/op	11608.06 MB/s	   65768 B/op	       9 allocs/op
+BenchmarkTypeCheck-12                           	  377830	       599.8 ns/op	      32 B/op	       3 allocs/op
+BenchmarkTypeCheck-12                           	  408428	       597.8 ns/op	      32 B/op	       3 allocs/op
+BenchmarkTypeCheck-12                           	  409514	       597.7 ns/op	      32 B/op	       3 allocs/op
+PASS
+ok  	git.yuntuo.hk/k2safe/go-omni/copyx	3.326s
+goos: darwin
+goarch: arm64
+pkg: git.yuntuo.hk/k2safe/go-omni/httpc
+cpu: Apple M2 Max
+BenchmarkHTTPClient/128B/decode-12         	  170685	      1369 ns/op	    2347 B/op	      22 allocs/op
+BenchmarkHTTPClient/128B/decode-12         	  174030	      1384 ns/op	    2348 B/op	      22 allocs/op
+BenchmarkHTTPClient/128B/decode-12         	  179733	      1368 ns/op	    2348 B/op	      22 allocs/op
+BenchmarkHTTPClient/128B/discard-12        	  242395	      1009 ns/op	    1836 B/op	      21 allocs/op
+BenchmarkHTTPClient/128B/discard-12        	  242695	      1010 ns/op	    1836 B/op	      21 allocs/op
+BenchmarkHTTPClient/128B/discard-12        	  230649	      1008 ns/op	    1836 B/op	      21 allocs/op
+BenchmarkHTTPClient/4KiB/decode-12         	   34294	      7130 ns/op	   17085 B/op	      31 allocs/op
+BenchmarkHTTPClient/4KiB/decode-12         	   34273	      6992 ns/op	   17085 B/op	      31 allocs/op
+BenchmarkHTTPClient/4KiB/decode-12         	   33758	      7184 ns/op	   17086 B/op	      31 allocs/op
+BenchmarkHTTPClient/4KiB/discard-12        	  215698	      1059 ns/op	    1836 B/op	      21 allocs/op
+BenchmarkHTTPClient/4KiB/discard-12        	  226962	      1108 ns/op	    1837 B/op	      21 allocs/op
+BenchmarkHTTPClient/4KiB/discard-12        	  227298	      1045 ns/op	    1836 B/op	      21 allocs/op
+BenchmarkHTTPClient/64KiB/decode-12        	    3099	     79497 ns/op	  213929 B/op	      38 allocs/op
+BenchmarkHTTPClient/64KiB/decode-12        	    2742	     80571 ns/op	  213924 B/op	      38 allocs/op
+BenchmarkHTTPClient/64KiB/decode-12        	    2696	    121378 ns/op	  213907 B/op	      38 allocs/op
+BenchmarkHTTPClient/64KiB/discard-12       	  111092	      2144 ns/op	    1836 B/op	      21 allocs/op
+BenchmarkHTTPClient/64KiB/discard-12       	  103948	      2132 ns/op	    1836 B/op	      21 allocs/op
+BenchmarkHTTPClient/64KiB/discard-12       	  115408	      2111 ns/op	    1835 B/op	      21 allocs/op
+BenchmarkHTTPClient/Do-12                  	  374404	       656.7 ns/op	    1296 B/op	      17 allocs/op
+BenchmarkHTTPClient/Do-12                  	  353349	       664.5 ns/op	    1296 B/op	      17 allocs/op
+BenchmarkHTTPClient/Do-12                  	  348849	       665.8 ns/op	    1296 B/op	      17 allocs/op
+BenchmarkJSONSuccessStatus/false-12        	  203222	      1233 ns/op	    2345 B/op	      22 allocs/op
+BenchmarkJSONSuccessStatus/false-12        	  201913	      1213 ns/op	    2345 B/op	      22 allocs/op
+BenchmarkJSONSuccessStatus/false-12        	  201854	      1224 ns/op	    2345 B/op	      22 allocs/op
+BenchmarkJSONSuccessStatus/true-12         	  199285	      1249 ns/op	    2393 B/op	      23 allocs/op
+BenchmarkJSONSuccessStatus/true-12         	  184888	      1254 ns/op	    2393 B/op	      23 allocs/op
+BenchmarkJSONSuccessStatus/true-12         	  194844	      1222 ns/op	    2393 B/op	      23 allocs/op
+PASS
+ok  	git.yuntuo.hk/k2safe/go-omni/httpc	7.606s
+goos: darwin
+goarch: arm64
+pkg: git.yuntuo.hk/k2safe/go-omni/logx
+cpu: Apple M2 Max
+BenchmarkLoggerTimeZone/#00-12         	  256226	       850.2 ns/op	     112 B/op	       3 allocs/op
+BenchmarkLoggerTimeZone/#00-12         	  277039	       852.6 ns/op	     112 B/op	       3 allocs/op
+BenchmarkLoggerTimeZone/#00-12         	  285422	       851.5 ns/op	     112 B/op	       3 allocs/op
+BenchmarkLoggerTimeZone/UTC-12         	  270704	       885.0 ns/op	     112 B/op	       3 allocs/op
+BenchmarkLoggerTimeZone/UTC-12         	  277340	       879.1 ns/op	     112 B/op	       3 allocs/op
+BenchmarkLoggerTimeZone/UTC-12         	  271767	       890.3 ns/op	     112 B/op	       3 allocs/op
+BenchmarkLoggerTimeZone/Asia/Shanghai-12         	  273482	       883.3 ns/op	     112 B/op	       3 allocs/op
+BenchmarkLoggerTimeZone/Asia/Shanghai-12         	  274610	       888.7 ns/op	     112 B/op	       3 allocs/op
+BenchmarkLoggerTimeZone/Asia/Shanghai-12         	  270154	       892.8 ns/op	     112 B/op	       3 allocs/op
+PASS
+ok  	git.yuntuo.hk/k2safe/go-omni/logx	2.665s

scripts/verifyManagedRelease.py

@@ -140,7 +140,8 @@ def main():
         http_events = [json.loads(line) for line in http_output.splitlines() if line.startswith("{")]
         http_passed = {e.get("Test") for e in http_events if e.get("Action") == "pass"}
         assert {"TestProxyRouting", "TestJSONHeadersConcurrentSnapshot", "TestPoolLimitsAndIdleExpiry",
-                "TestErrorBodyPoolReuseAndDrainBound", "TestSlowKnownErrorBodyHasShortDrainBudget"} <= http_passed
+                "TestErrorBodyPoolReuseAndDrainBound", "TestSlowKnownErrorBodyHasShortDrainBudget",
+                "TestJSONSuccessStatuses", "TestJSONSuccessStatusConcurrentOptions", "TestJSONRejectedSuccessBodyRecovery"} <= http_passed
         example_output = run(["go", "run", MODULE + "/examples/httpClient"], starter, env)
         assert "authenticated request succeeded" in example_output
         checks += ["remoteHTTPClientRaceTests", "remoteHTTPProxyAndTimeouts", "remoteHTTPHeaderIsolation",
@@ -150,12 +151,24 @@ def main():
         config_events = [json.loads(line) for line in config_output.splitlines() if line.startswith("{")]
         config_passed = {e.get("Test") for e in config_events if e.get("Action") == "pass"}
         assert {"TestExplicitReferencesAcrossFormats", "TestReferenceFallbackAndFixedValues",
-                "TestReferenceDiagnosticsAndScalarLimits", "TestRemovedEnvTagsAndFieldSuggestion"} <= config_passed
+                "TestReferenceDiagnosticsAndScalarLimits", "TestRemovedEnvTagsAndFieldSuggestion",
+                "TestModuleFieldDiagnostics", "TestModuleDiagnosticsKeepReferenceAndCause"} <= config_passed
         run([cli, "api", "generate", "--check"], starter, env)
         run(["go", "run", ".", "-config", "etc/config.yaml", "-check-config"], starter, env)
         checks += ["remoteExplicitConfigurationRaceTests", "literalAndRequiredDefaultReferences",
                    "remoteCheckConfigBeforeDependencies", "removedImplicitEnvironmentRules"]
 
+        for package, expected in {
+            "copyx": {"TestCheckTypesAndEmptyCollections", "TestCheckRulesAndConverterBoundaries", "TestCopierCheckConcurrentAndOptionsIsolation"},
+            "logx": {"TestLoggerTimeZoneIsolation", "TestLoggerTimeZoneValidationAndDST", "TestLoggerTimeZoneConcurrentChildren"},
+        }.items():
+            output = run(["go", "test", "-race", "-count=1", "-json", MODULE + "/" + package], starter, env)
+            events = [json.loads(line) for line in output.splitlines() if line.startswith("{")]
+            passed = {event.get("Test") for event in events if event.get("Action") == "pass"}
+            assert expected <= passed
+        checks += ["remotePreciseModuleDiagnostics", "remoteJSONSuccessStatuses", "remoteRejectedStatusBodyCleanup",
+                   "remoteCopyTypePreflight", "remoteEmptyCollectionTypeRejection", "remoteLoggerTimeZoneIsolation"]
+
         checks += ["flatFieldComposition", "copyxThreeEndpointConsumer", "explicitNullAndMoneyPolicies", "fieldAdditionWithoutCopyRuleChanges", "middlewareFactoryInjectionAndCleanup", "optionalRepositoryPreservesBusiness"]
 
     checks += ["generatedUnifiedConfig", "jsonYamlXmlAndCustomDecoder", "configValidationBeforeDependencies", "configEnvProvenance", "configExtensionPreserved", "configLoaderDriftCheck"]
@@ -172,6 +185,9 @@ def main():
     sources += ["cmd/go-omni/apigen/configLoader_test.go", "cmd/go-omni/apigen/testdata/configuration/consumer_test.go", "cmd/go-omni/scaffold/templates/api-load.go.tmpl", "cmd/go-omni/scaffold/templates/api-loader.go.tmpl"]
     sources += [str(p.relative_to(ROOT)) for p in (ROOT / "httpc").glob("*.go")]
     sources += [str(p.relative_to(ROOT)) for p in (ROOT / "examples/httpClient").glob("*.go")]
+    sources += [str(p.relative_to(ROOT)) for p in (ROOT / "logx").glob("*.go")]
+    sources += ["internal/configdiag/error.go", "database/mysql/mysql.go", "database/connector.go", "database/database.go", "contract/policy.go"]
+    sources += [str(p.relative_to(ROOT)) for p in (ROOT / "examples/developerTools").iterdir() if p.is_file()]
     report = {"passed": True, "frameworkVersion": args.version, "frameworkSum": dependency["Sum"],
               "freshModuleCache": True, "noLocalReplace": True,
               "durationSeconds": round(time.monotonic() - started, 2), "checks": checks,