create: Checkpoint 2026-09-30 02:51:19 UTC [3f41c4ffa5]

MemRelay-Operation: checkpoint-save:fix5-metrics-b4789fc-20260930 MemRelay-Resource: 9a4c2024-f07c-47b5-9ba1-5f9de83cf6bf
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+---
+title: Checkpoint 2026-09-30 02:51:19 UTC [3f41c4ffa5]
+type: checkpoint
+permalink: main/projects/25464650-ed5d-440e-b362-190f2852d451/checkpoint-2026-09-30-02-51-19-utc-3f41c4ffa5
+stable_id: 9a4c2024-f07c-47b5-9ba1-5f9de83cf6bf
+scope: project
+memory_type: checkpoint
+project_id: 25464650-ed5d-440e-b362-190f2852d451
+usage_profile_id: 0c9feb46-d06e-43cd-9ef0-c5813c84a998
+status: active
+revision: 1
+request_id: fix5-metrics-b4789fc-20260930
+created_at: '2026-09-30T02:51:19.017727+00:00'
+updated_at: '2026-09-30T02:51:19.017727+00:00'
+tags:
+- fix-5
+- feat/fix-5-metrics
+- ready-to-merge
+---
+
+# 检查点：fix issue #5 metrics 打点（已推分支，未合 main）
+
+## 范围
+- 工作树 `e:\\code\\NixMsg-wt\\fix5`
+- 分支 `feat/fix-5-metrics` → `origin/feat/fix-5-metrics`
+- 提交 `b4789fc`（基线 `479a08e`）
+- issue #5；**未**合并 main；**未**关闭 issue
+
+## 完成
+- `nixmsg_connections{ws|tcp}`：broker OnSessionEstablished/OnDisconnect 末尾 Inc/Dec
+- `endpoints`/`deliveries_pending`/`messages_scheduled` + 写队列/哈希排队：messageLoops 每秒采样真实值
+- `dispatch_to_push`/`ack` 直方图：PushPending 成功推送、Ack 成功确认时 Observe
+- `write_batch_commit`：store.Queue.OnBatchCommit
+- `errors_total`：uplink replyErr
+- DEVIATIONS 追加 `### fix-issue-5`
+- 未改 group emit / 管理锁定 / 注册 IP / fatal；避开 PublishDown 与 dissolve 回执大段
+
+## 验证
+- `go test ./internal/metrics/ ./internal/broker/ ./internal/app/message/ ./internal/store/ ./cmd/nixmsg/ ./internal/httpx/` 通过
+- 未跑全仓 task check
+
+## 下一步
+- 总控审阅后 ff-only 合 main；本线勿合 main
+- 与 feat/fix-3-downlink-deadlock、feat/fix-6-dissolve-receipt 合并时注意 hooks 末尾与 ack 小 diff