feat: observe workflow inbox backlog

2026-09-19 17:42:49 +08:00
parent da5874b17a
commit 0ac3f2f3f8
10 changed files with 46 additions and 8 deletions
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -81,7 +81,7 @@
 - A04须截留真实task.assign并独立确认LEASED/未授权，再强杀旧节点、Wait确认退出、新节点等原租约自然到期；不能把已送达未开始替代未送达。COMMIT故障工具只在测试二进制：BEFORE阻止COMMIT，AFTER核验真实MySQL成功包后丢确认；独立连接回读，原身份/候选恢复，禁止在生产增加故障开关或将HTTP丢回执替代数据库提交不明。
 - W16下一轮时钟只能在PENDING结果已保存等待后存在，三方竞争中的结果参与者是旧结果重放；新结果/未知/冲突另有在途查询回归。保持原受理时间、事件时间、截止与预算，不能凭有限入队顺序声称穷尽线程交错。

- P6进程观测使用internal/observability固定指标目录，拒绝未知名称、类型和动态标签，不能引入任务/租户/业务键/凭据维度。ORBIT_METRICS_ADDR默认空（关闭），显式启用独立采集监听；业务端口不得暴露全局指标。渲染和网络I/O不持有全局记录锁，每个直方图局部快照保持桶/count/sum一致，最多2个并发抓取。启用指标后的5秒后台采样使用000026–000028固定索引读取任务、交付、流程状态、固定事件类别和终态耗时，每个状态或事件最多10000条、事件窗口5分钟、900ms数据库截止；采样失败保留最后成功状态并独立记录错误/超时，不能影响业务事务或把有限样本当全局精确数。
+- P6进程观测使用internal/observability固定指标目录，拒绝未知名称、类型和动态标签，不能引入任务/租户/业务键/凭据维度。ORBIT_METRICS_ADDR默认空（关闭），显式启用独立采集监听；业务端口不得暴露全局指标。渲染和网络I/O不持有全局记录锁，每个直方图局部快照保持桶/count/sum一致，最多2个并发抓取。启用指标后的5秒后台采样使用000026–000028固定索引读取任务、交付、流程状态、Weave Inbox状态、固定事件类别和终态耗时，每个状态或事件最多10000条、事件窗口5分钟、900ms数据库截止；采样失败保留最后成功状态并独立记录错误/超时，不能影响业务事务或把有限样本当全局精确数。
 - HTTP成功升级在Hijack完成时记录握手，WS处理器存续计入独立连接指标；保持1xx临时响应、Flush、Hijack与原panic行为。DB池取本地Stats，抓取不查询业务库；后台批次success不是业务任务成功量。观测丢样或失败不得改变权威事务及恢复决定。
 - 进程指标、固定状态采样、格式验证、告警规则和标准回归证据见docs/reports/phase-6-observability.md及docs/reports/phase-6-business-observability.md。仍须补受理/授权/完成与流程推进延迟、持久吞吐/积压的全局聚合、重试/核查/恢复量、发送队列、实际采集告警及负载开销，不能把进程观测通过写成P6已完成。普通清理仍须保护有效幂等、未确认事件、未知结果和未终结流程。
 - 凭据轮换保留credential_id及订阅/Worker授权绑定，在同一事务替换摘要、固定到期时间、幂等回执和管理审计；新令牌必须重新建立会话，认证路径每次重新核对凭据状态。撤销必须让认证失效并保留原任务、订阅、交付、会话和审计证据，允许在应用或命名空间停用后执行；重复应用同一固定操作幂等返回。管理CLI先把固定操作文件写成0600，再提交；提交不明时保留文件并用原文件重放，不能重新生成秘密。日志、审计摘要、指标和业务表不得保存秘密原文或摘要。不要把轮换同一凭据ID解释成历史令牌仍有效，也不得级联删除订阅、任务或事件。
--- a/cmd/orbit/main.go
+++ b/cmd/orbit/main.go
@@ -200,6 +200,7 @@ func run() error {
 						TaskStates: snapshot.TaskStates, TaskOldestAgeSeconds: snapshot.TaskOldestAgeSeconds,
 						DeliveryStates: snapshot.DeliveryStates, DeliveryOldestAgeSeconds: snapshot.DeliveryOldestAgeSeconds,
 						WorkflowStates: snapshot.WorkflowStates, WorkflowOldestAgeSeconds: snapshot.WorkflowOldestAgeSeconds,
+						InboxStates: snapshot.InboxStates, InboxOldestAgeSeconds: snapshot.InboxOldestAgeSeconds,
 						RecentEvents:               snapshot.RecentEvents,
 						TaskTerminalLatencySeconds: snapshot.TaskTerminalLatencySeconds, TaskTerminalLatencyMaxSeconds: snapshot.TaskTerminalLatencyMaxSeconds,
 						WorkflowTerminalLatencySeconds: snapshot.WorkflowTerminalLatencySeconds, WorkflowTerminalLatencyMaxSeconds: snapshot.WorkflowTerminalLatencyMaxSeconds,
--- a/docs/08-development-plan.md
+++ b/docs/08-development-plan.md
@@ -59,7 +59,7 @@ P4/P5定时等待与后续查询轮次的实现及回归记录见[时钟报告](
 ### P6 首批实施顺序

 1. 已补[首批可复现故障工具](reports/phase-6-fault-boundaries.md)：A04“派发已提交但消息尚未送达”、W01/W13事务提交结果不明，以及W16最终回执/旧PENDING结果重放/下一轮竞争。每个切点必须有实际数据库或进程证据，不能用响应错误推断事务是否已提交，也不能用普通SIGNAL竞争替代最终查询场景。
-2. 已实现[基础运行观测](api/observability.md)及[有界业务状态与事件采样](reports/phase-6-business-observability.md)：HTTP/WS、数据库连接池、后台批次、固定状态计数、最近事件类别、终态耗时样本、最早年龄、截断/新鲜度指标和可离线验证的告警规则；独立采集监听默认关闭，固定指标目录拒绝动态标签；发布前只读结构核验由[`orbit-admin verify`](api/operations.md)提供。仍需受理/授权阶段端到端延迟与全局持久吞吐、流程Inbox推进延迟、全局发送队列、多节点聚合及生产采集/通知验证。
+2. 已实现[基础运行观测](api/observability.md)及[有界业务状态与事件采样](reports/phase-6-business-observability.md)：HTTP/WS、数据库连接池、后台批次、固定任务/交付/流程/Inbox状态计数、最近事件类别、终态耗时样本、最早年龄、截断/新鲜度指标和可离线验证的告警规则；独立采集监听默认关闭，固定指标目录拒绝动态标签；发布前只读结构核验由[`orbit-admin verify`](api/operations.md)提供。仍需受理/授权阶段端到端延迟与全局持久吞吐、Inbox从事件产生到推进完成的阶段延迟、全局发送队列、多节点聚合及生产采集/通知验证。
 3. 已补齐受保护管理环境中的固定凭据操作文件、轮换、撤销、幂等回执和脱敏管理审计；轮换保留授权绑定并要求新令牌重新建立会话，撤销允许在停用范围内执行且不改写历史记录。仍需补齐提交不明故障切点、多节点安全重绑演练、凭据最小权限配置核对和生产密钥托管/审计演练。
 4. 已补[`orbit-admin retention inventory`](api/retention.md)只读盘点和[阶段报告](reports/phase-6-retention-inventory.md)，能区分过期幂等、确定终态、未知效果、未终结流程、已确认/未确认交付、已消费/未消费Inbox、事件和审计规模；它不执行归档或删除。后续仍需评审各类保留周期、归档格式、受保护记录核对，再执行备份恢复、兼容升级和六类容量负载。未确认交付、有效幂等身份、当前/历史执行证据和未终结流程不能被普通清理破坏。生产HA及RPO/RTO继续按实际拓扑验证，不缩减为本机多进程检查。

--- a/docs/api/observability.md
+++ b/docs/api/observability.md
@@ -53,6 +53,8 @@ curl -fsS http://127.0.0.1:9090/metrics
 | `orbit_result_delivery_oldest_age_seconds` | gauge | PENDING/LEASED交付样本中最早可处理时间的年龄 |
 | `orbit_weave_workflows_state{state}` | gauge | Weave实例固定状态的有界计数 |
 | `orbit_weave_workflow_oldest_age_seconds` | gauge | RUNNING/WAITING/CANCELLING/NEEDS_REVIEW实例样本中最早更新时间的年龄 |
+| `orbit_weave_inbox_state{state}` | gauge | Weave内部Inbox固定状态的有界计数，状态为PENDING、LEASED、PROCESSED、QUARANTINED |
+| `orbit_weave_inbox_oldest_age_seconds` | gauge | PENDING/LEASED Inbox样本中最早可处理时间的年龄 |
 | `orbit_business_events_recent{event}` | gauge | 最近5分钟内固定事件类别的有界数量，用于观察受理、完成、核查、恢复和流程推进趋势 |
 | `orbit_pulse_task_terminal_latency_seconds` / `_max_seconds` | gauge | 最近5分钟终态任务从创建到完成的平均/最大耗时样本，单位秒 |
 | `orbit_weave_workflow_terminal_latency_seconds` / `_max_seconds` | gauge | 最近5分钟终态流程从创建到完成的平均/最大耗时样本，单位秒 |
@@ -103,4 +105,4 @@ promtool check rules deploy/monitoring/orbit.rules.yml
 promtool test rules deploy/monitoring/orbit.rules.test.yml
 ```

-HTTP失败率和延迟可按route/status_class统计；受理接口响应成功与已完成业务应分别判断。业务状态、事件窗口和终结耗时指标是本节点有限样本，不能相加作为全局精确数量；未知事件类型不会进入标签，终结耗时从持久化`created_at`到`completed_at`计算，不包含端到端外部副作用。应结合 `orbit_business_snapshot_last_success_timestamp_seconds` 和 `orbit_business_snapshot_truncated` 判断新鲜度与完整性。可靠结果量、授权阶段延迟、流程Inbox推进延迟、发送队列、磁盘/复制等仍须补充专门指标；具体当前证据见[进程观测报告](../reports/phase-6-observability.md)和[有界业务采样报告](../reports/phase-6-business-observability.md)。
+HTTP失败率和延迟可按route/status_class统计；受理接口响应成功与已完成业务应分别判断。业务状态、事件窗口、Inbox状态和终结耗时指标是本节点有限样本，不能相加作为全局精确数量；未知事件类型不会进入标签，终结耗时从持久化`created_at`到`completed_at`计算，不包含端到端外部副作用，Inbox年龄从`available_at`计算，不等于流程推进完成延迟。应结合 `orbit_business_snapshot_last_success_timestamp_seconds` 和 `orbit_business_snapshot_truncated` 判断新鲜度与完整性。可靠结果量、授权阶段延迟、全局发送队列、磁盘/复制等仍须补充专门指标；具体当前证据见[进程观测报告](../reports/phase-6-observability.md)和[有界业务采样报告](../reports/phase-6-business-observability.md)。
--- a/docs/reports/phase-6-business-observability.md
+++ b/docs/reports/phase-6-business-observability.md
@@ -7,6 +7,7 @@
 - 迁移 `000026_operational_metrics` 为 `pulse_tasks`、`orbit_deliveries`、`weave_instances` 增加固定前缀索引；不增加模型字段，不引入外键或级联。
 - 迁移 `000027_operational_event_metrics` 为不可变 `orbit_events` 增加 `(type,occurred_at,id)` 固定事件窗口索引；不增加模型字段，不引入外键或级联。
 - 迁移 `000028_terminal_latency_metrics` 为任务和流程终态完成时间增加固定索引；采样最近5分钟成功/失败/取消记录，计算从持久化创建到终态的平均/最大耗时，仍不增加模型字段。
+- 现有 `weave_inbox` 的固定 `ix_inbox_due` 已纳入采样：输出 `PENDING`、`LEASED`、`PROCESSED`、`QUARANTINED` 四种有界状态以及待消费事件的最早 `available_at` 年龄；不把该年龄误称为流程推进完成延迟。
 - [存储采样器](../../internal/storage/mysql/operational_metrics.go)只拼接代码内固定的表、索引、列名、状态和事件集合。每个状态或事件类别使用索引读取最多10001条，再将结果封顶到10000；至少一类封顶时 `orbit_business_snapshot_truncated=1`。
 - 采样器先读取数据库UTC时间，再读取任务、结果交付和流程实例固定状态计数、最早未完成年龄及最近5分钟受理/完成/核查/恢复/流程推进事件类别。所有调用由独立900ms上下文限制；取消、数据库错误和超时都返回失败，不修改持久化数据。
 - [业务指标记录器](../../internal/observability/business.go)将成功、错误、超时分别计数并记录耗时。失败样本不覆盖最后一次成功状态，同时保留最后成功时间，方便告警区分“旧值可见”和“本轮采集失败”。标签基数和状态取值均在目录中固定。
@@ -16,12 +17,12 @@
 ## 回归证据

 - [业务记录器单测](../../internal/observability/metrics_test.go)验证成功状态、年龄、截断、成功计数和失败后保留最后成功值；超时计数单独增加。
- [真实MySQL专项](../../internal/storage/mysql/operational_metrics_integration_test.go)验证三次迁移索引真实存在、数据库外键为0、任务状态、`task.accepted`事件和终态耗时被采样、固定状态集合存在，并验证已取消上下文被拒绝。
+- [真实MySQL专项](../../internal/storage/mysql/operational_metrics_integration_test.go)验证三次迁移索引真实存在、数据库外键为0、任务状态、交付状态、流程状态、Inbox状态、`task.accepted`事件和终态耗时被采样、固定状态集合存在，并验证已取消上下文被拒绝。
 - `go test ./...`覆盖编译和普通单测；真实MySQL专项由标准`GO=... DOCKER=... sh scripts/test-mysql.sh`执行，未设置`ORBIT_TEST_MYSQL_DSN`时专项会跳过，不能把跳过当通过。最新000028标准脚本在Go 1.27.1、darwin/arm64、Docker MySQL 8.4.10环境退出码为0；存储/迁移/事务组、指标开关进程组、流程运行器全停恢复、SDK与两个独立业务示例均通过。日志确认`TestIntegrationOperationalSnapshot`、`TestIntegrationNoForeignKeysUpgrade`、`TestIntegrationCredentialOperations`、`TestIntegrationCredentialCommitFaults`、`TestIntegrationMetricsProcess`及`TestIntegrationWorkflowRuntimeProcess`均PASS，迁移账本到000028且dirty=false；脚本新增的`orbit-admin verify`实际输出`schema_version=28`、`migration_count=28`、`foreign_key_count=0`、`required_index_count=6`、`complete=true`。
- 当前固定目录导出的指标夹具为929298字节，包含事件标签回归；`promtool check metrics`成功；`promtool check rules deploy/monitoring/orbit.rules.yml`报告7条规则成功，`promtool test rules deploy/monitoring/orbit.rules.test.yml`成功。标准验证镜像仅用于离线检查，平台运行不依赖Prometheus。
+- 当前固定目录导出的指标夹具为930520字节，包含事件和Inbox标签回归；`promtool check metrics`成功；`promtool check rules deploy/monitoring/orbit.rules.yml`报告7条规则成功，`promtool test rules deploy/monitoring/orbit.rules.test.yml`成功。标准验证镜像仅用于离线检查，平台运行不依赖Prometheus。

 ## 解释和边界

 每个Orbit节点都读取自己的有限样本；多节点指标不能直接相加获得全局精确积压或吞吐。达到10000上限、采样超时、节点重启或节点间时间不同都会影响解释，必须结合截断标记、最后成功时间、数据库权威查询和审计判断。事件窗口按`occurred_at`统计固定类别，不包含未知类型；它是趋势线索，不是端到端受理、授权或完成延迟。

-当前仍未完成端到端授权/外部效果阶段延迟、全局吞吐聚合、流程Inbox推进延迟、发送队列全局聚合、生产采集通知演练、锁/磁盘/复制指标和多故障域容量验证。此批实现不能替代保留、备份恢复、HA、RPO/RTO及发布验收。
+当前仍未完成端到端授权/外部效果阶段延迟、全局吞吐聚合、Inbox从事件产生到推进完成的精确阶段延迟、发送队列全局聚合、生产采集通知演练、锁/磁盘/复制指标和多故障域容量验证。此批实现不能替代保留、备份恢复、HA、RPO/RTO及发布验收。
--- a/internal/observability/business.go
+++ b/internal/observability/business.go
@@ -21,6 +21,10 @@ type BusinessSnapshot struct {
 	WorkflowStates map[string]uint64
 	// WorkflowOldestAgeSeconds 未终结流程中最早更新时间的年龄。
 	WorkflowOldestAgeSeconds float64
+	// InboxStates Weave 内部事件状态的有界计数。
+	InboxStates map[string]uint64
+	// InboxOldestAgeSeconds 待消费内部事件中最早可处理记录的年龄。
+	InboxOldestAgeSeconds float64
 	// Truncated 是否至少有一类状态达到采样上限。
 	Truncated bool
 	// RecentEvents 固定事件类别在最近窗口内的有界数量。
@@ -63,6 +67,9 @@ func (r *Registry) RecordBusinessSnapshot(snapshot BusinessSnapshot, started tim
 	for _, state := range workflowStates {
 		r.SetGauge("orbit_weave_workflows_state", float64(snapshot.WorkflowStates[state]), Labels{"state": state})
 	}
+	for _, state := range inboxStates {
+		r.SetGauge("orbit_weave_inbox_state", float64(snapshot.InboxStates[state]), Labels{"state": state})
+	}
 	for _, eventType := range eventTypes {
 		r.SetGauge("orbit_business_events_recent", float64(snapshot.RecentEvents[eventType]), Labels{"event": eventType})
 	}
@@ -73,6 +80,7 @@ func (r *Registry) RecordBusinessSnapshot(snapshot BusinessSnapshot, started tim
 	r.SetGauge("orbit_pulse_tasks_oldest_age_seconds", snapshot.TaskOldestAgeSeconds, nil)
 	r.SetGauge("orbit_result_delivery_oldest_age_seconds", snapshot.DeliveryOldestAgeSeconds, nil)
 	r.SetGauge("orbit_weave_workflow_oldest_age_seconds", snapshot.WorkflowOldestAgeSeconds, nil)
+	r.SetGauge("orbit_weave_inbox_oldest_age_seconds", snapshot.InboxOldestAgeSeconds, nil)
 	truncated := 0.0
 	if snapshot.Truncated {
 		truncated = 1
--- a/internal/observability/catalog.go
+++ b/internal/observability/catalog.go
@@ -9,6 +9,7 @@ var components = []string{"workflow", "schedule", "execution_recovery"}
 var taskStates = []string{"WAITING", "LEASED", "RUNNING", "NEEDS_REVIEW", "SUCCEEDED", "FAILED", "CANCELLED"}
 var deliveryStates = []string{"PENDING", "LEASED", "ACKED", "EXPIRED"}
 var workflowStates = []string{"RUNNING", "WAITING", "CANCELLING", "NEEDS_REVIEW", "SUCCEEDED", "FAILED", "CANCELLED"}
+var inboxStates = []string{"PENDING", "LEASED", "PROCESSED", "QUARANTINED"}
 var eventTypes = []string{"task.accepted", "task.started", "task.succeeded", "task.failed", "task.needs_review", "task.requeued", "workflow.started", "workflow.advanced", "workflow.recovered", "workflow.blocked", "workflow.stopped"}

 // Every exported family is declared here, including each allowed label value.
@@ -43,6 +44,8 @@ func catalog() map[string]descriptor {
 	c["orbit_result_delivery_oldest_age_seconds"] = descriptor{gauge, "Age of the oldest sampled pending result delivery", nil}
 	c["orbit_weave_workflows_state"] = descriptor{gauge, "Bounded count of Weave instances by durable state", map[string][]string{"state": workflowStates}}
 	c["orbit_weave_workflow_oldest_age_seconds"] = descriptor{gauge, "Age of the oldest sampled unfinished Weave instance", nil}
+	c["orbit_weave_inbox_state"] = descriptor{gauge, "Bounded count of Weave internal inbox records by durable state", map[string][]string{"state": inboxStates}}
+	c["orbit_weave_inbox_oldest_age_seconds"] = descriptor{gauge, "Age of the oldest sampled pending Weave inbox record", nil}
 	c["orbit_business_events_recent"] = descriptor{gauge, "Bounded count of fixed event categories in the recent window", map[string][]string{"event": eventTypes}}
 	c["orbit_pulse_task_terminal_latency_seconds"] = descriptor{gauge, "Average sampled Pulse task create-to-terminal latency in seconds", nil}
 	c["orbit_pulse_task_terminal_latency_max_seconds"] = descriptor{gauge, "Maximum sampled Pulse task create-to-terminal latency in seconds", nil}
--- a/internal/observability/metrics_test.go
+++ b/internal/observability/metrics_test.go
@@ -123,6 +123,8 @@ func TestBusinessSnapshotKeepsLastGoodStateOnFailure(t *testing.T) {
 		DeliveryOldestAgeSeconds:   8.25,
 		WorkflowStates:             map[string]uint64{"RUNNING": 1},
 		WorkflowOldestAgeSeconds:   4.75,
+		InboxStates:                map[string]uint64{"PENDING": 6},
+		InboxOldestAgeSeconds:      3.25,
 		RecentEvents:               map[string]uint64{"task.accepted": 5},
 		TaskTerminalLatencySeconds: 2.5, TaskTerminalLatencyMaxSeconds: 7.5,
 		WorkflowTerminalLatencySeconds: 3.5, WorkflowTerminalLatencyMaxSeconds: 9.5,
@@ -133,10 +135,12 @@ func TestBusinessSnapshotKeepsLastGoodStateOnFailure(t *testing.T) {
 		`orbit_pulse_tasks_state{state="WAITING"} 3`,
 		`orbit_result_deliveries_state{state="PENDING"} 2`,
 		`orbit_weave_workflows_state{state="RUNNING"} 1`,
+		`orbit_weave_inbox_state{state="PENDING"} 6`,
 		`orbit_business_events_recent{event="task.accepted"} 5`,
 		"orbit_pulse_task_terminal_latency_seconds 2.5",
 		"orbit_weave_workflow_terminal_latency_max_seconds 9.5",
 		"orbit_pulse_tasks_oldest_age_seconds 12.5",
+		"orbit_weave_inbox_oldest_age_seconds 3.25",
 		"orbit_business_snapshot_truncated 1",
 		`orbit_business_snapshot_total{outcome="success"} 1`,
 	} {
--- a/internal/storage/mysql/operational_metrics.go
+++ b/internal/storage/mysql/operational_metrics.go
@@ -25,6 +25,10 @@ type OperationalSnapshot struct {
 	WorkflowStates map[string]uint64
 	// WorkflowOldestAgeSeconds 是未终结流程中最早 updated_at 的年龄。
 	WorkflowOldestAgeSeconds float64
+	// InboxStates 是 Weave 内部事件按状态的有界计数。
+	InboxStates map[string]uint64
+	// InboxOldestAgeSeconds 是待消费内部事件中最早 available_at 的年龄。
+	InboxOldestAgeSeconds float64
 	// Truncated 表示至少一个状态达到有界采样上限。
 	Truncated bool
 	// RecentEvents 是固定事件类别在最近窗口内的有界数量。
@@ -43,6 +47,7 @@ var (
 	operationalTaskStates     = []string{"WAITING", "LEASED", "RUNNING", "NEEDS_REVIEW", "SUCCEEDED", "FAILED", "CANCELLED"}
 	operationalDeliveryStates = []string{"PENDING", "LEASED", "ACKED", "EXPIRED"}
 	operationalWorkflowStates = []string{"RUNNING", "WAITING", "CANCELLING", "NEEDS_REVIEW", "SUCCEEDED", "FAILED", "CANCELLED"}
+	operationalInboxStates    = []string{"PENDING", "LEASED", "PROCESSED", "QUARANTINED"}
 	operationalEventTypes     = []string{"task.accepted", "task.started", "task.succeeded", "task.failed", "task.needs_review", "task.requeued", "workflow.started", "workflow.advanced", "workflow.recovered", "workflow.blocked", "workflow.stopped"}
 )

@@ -68,10 +73,18 @@ func ReadOperationalSnapshot(ctx context.Context, db *sql.DB) (OperationalSnapsh
 	if err != nil {
 		return OperationalSnapshot{}, err
 	}
+	inbox, inboxTruncated, err := boundedStateCounts(ctx, db, "weave_inbox", "ix_inbox_due", operationalInboxStates)
+	if err != nil {
+		return OperationalSnapshot{}, err
+	}
 	taskAge, err := oldestAge(ctx, db, "pulse_tasks", "ix_task_observe_state_available", []string{"WAITING", "LEASED", "RUNNING", "NEEDS_REVIEW"}, "available_at", now)
 	if err != nil {
 		return OperationalSnapshot{}, err
 	}
+	inboxAge, err := oldestAge(ctx, db, "weave_inbox", "ix_inbox_due", []string{"PENDING", "LEASED"}, "available_at", now)
+	if err != nil {
+		return OperationalSnapshot{}, err
+	}
 	deliveryAge, err := oldestAge(ctx, db, "orbit_deliveries", "ix_delivery_observe_state_available", []string{"PENDING", "LEASED"}, "available_at", now)
 	if err != nil {
 		return OperationalSnapshot{}, err
@@ -96,10 +109,11 @@ func ReadOperationalSnapshot(ctx context.Context, db *sql.DB) (OperationalSnapsh
 		TaskStates: tasks, TaskOldestAgeSeconds: taskAge,
 		DeliveryStates: deliveries, DeliveryOldestAgeSeconds: deliveryAge,
 		WorkflowStates: workflows, WorkflowOldestAgeSeconds: workflowAge,
+		InboxStates: inbox, InboxOldestAgeSeconds: inboxAge,
 		RecentEvents:               events,
 		TaskTerminalLatencySeconds: taskLatency.average, TaskTerminalLatencyMaxSeconds: taskLatency.maximum,
 		WorkflowTerminalLatencySeconds: workflowLatency.average, WorkflowTerminalLatencyMaxSeconds: workflowLatency.maximum,
-		Truncated: taskTruncated || deliveryTruncated || workflowTruncated || eventTruncated || taskLatency.truncated || workflowLatency.truncated,
+		Truncated: taskTruncated || deliveryTruncated || workflowTruncated || inboxTruncated || eventTruncated || taskLatency.truncated || workflowLatency.truncated,
 	}, nil
 }

--- a/internal/storage/mysql/operational_metrics_integration_test.go
+++ b/internal/storage/mysql/operational_metrics_integration_test.go
@@ -70,7 +70,7 @@ func TestIntegrationOperationalSnapshot(t *testing.T) {
 	if got := snapshot.RecentEvents["task.accepted"]; got < 1 {
 		t.Fatalf("accepted event was not observed: %#v", snapshot.RecentEvents)
 	}
-	if snapshot.TaskOldestAgeSeconds < 0 || snapshot.DeliveryOldestAgeSeconds < 0 || snapshot.WorkflowOldestAgeSeconds < 0 {
+	if snapshot.TaskOldestAgeSeconds < 0 || snapshot.DeliveryOldestAgeSeconds < 0 || snapshot.WorkflowOldestAgeSeconds < 0 || snapshot.InboxOldestAgeSeconds < 0 {
 		t.Fatalf("negative age in snapshot: %#v", snapshot)
 	}
 	for _, state := range []string{"WAITING", "LEASED", "RUNNING", "NEEDS_REVIEW", "SUCCEEDED", "FAILED", "CANCELLED"} {
@@ -84,6 +84,11 @@ func TestIntegrationOperationalSnapshot(t *testing.T) {
 	if _, ok := snapshot.WorkflowStates["RUNNING"]; !ok {
 		t.Fatal("missing running workflow state")
 	}
+	for _, state := range []string{"PENDING", "LEASED", "PROCESSED", "QUARANTINED"} {
+		if _, ok := snapshot.InboxStates[state]; !ok {
+			t.Fatalf("missing fixed inbox state %q", state)
+		}
+	}
 	f.exec("UPDATE pulse_tasks SET state='SUCCEEDED', completed_at=UTC_TIMESTAMP(6), updated_at=UTC_TIMESTAMP(6), revision=revision+1 WHERE namespace_id=? AND id=?", f.resources.NamespaceID, task.ID)
 	completed, err := ReadOperationalSnapshot(ctx, db)
 	if err != nil {