Merge branch 'research/walk6-flow-perceivable' - #522
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- 嫌疑点③成立：findMergeTargetWorkUnit 稳态每条消息全热文件读（缓存被上一条 append 失效），成本随行数线性 3.4ms@492行→222ms@24.6K行 - 尾部倒扫替代实测全档位 ~0.4ms（约 300-700 倍）；生产 3 频道无 defaultProfileId，P3 当前休眠 - 附带发现：P1 replyTo / P2 linkWorkUnit 的 getMessageById 全频道扇出同样是 O(全量) 读口
EVENT trigger 只 observe 不唤醒（票面前提证伪）；建单路径统一吃 15s idle 地板， 实测建单→认领 8.5-12.0s、线程回复唤醒 4ms；claim/observe 开销 <40ms 可忽略。
线程回复与默认角色派单（新建 + 合并窗口并入在途 WU）两条路径此前断档， 现与 @mention 路径同写法写入/刷新 WU metadata.traceId（复用发消息路由 已生成的 audit requestId）。合并窗口口径按 spec user story 5 二选一， 统一取「本次消息 traceId」，与 AC「与本次请求一致」对齐。 路由级集成测试先红后绿：三条路径各断言建出/关联的 WU metadata.traceId 与本次请求一致；@mention 路径既有测试不回归。
测量②（spec 2026-09-12-channel-mainline-measurement §3/§4，决议 #505 最小常驻版）： - utils/clientPerf.ts：read-metrics 同构模块级 sink + safeEmit——默认开启 （HTTP sink 经既有 POST /api/v1/events 落 studio-events，不新增端点； 测试模式默认 null），setClientPerfSink(null) 整体关闭零行为变化，异常永不外泄 - 三埋点 client.perf.*：send_click（composer 提交瞬间）/ receipt_render （SSE 到达→渲染完成，含耗时）/ page_load（进页→首屏消息渲染完成，含耗时） - 接线：ChannelInput.handleSend / useChannelMessages SSE 新消息记起点 （已在列表的回声不记）/ ChannelDetailPage messages effect 记终点 - 测试：sink 单测（时机/事件名/负载/关闭零变化/异常不外泄/HTTP sink 契约） + hook 测试 + ChannelInput 组件测试 + ChannelDetailPage jsdom 时机测试
统一 code-review minor 修复：SSE 新消息标记起点前过滤 authorType==='agent'， 多用户共享频道时 client.perf.receipt_render 不再混入非回执样本。
dommaker
enabled auto-merge
September 12, 2026 16:53
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Summary
24 commits from feat/ship-20260913-0051
Commits
1e360db Merge branch 'research/walk6-flow-perceivable'
dc8ba19 Merge branch 'research/walk5-page-load'
0308d2a Merge branch 'research/walk4-receipt-fanout'
a97405b Merge branch 'research/walk3-claim-latency'
c367e6a Merge branch 'research/walk2-route-dispatch'
550a258 Merge branch 'research/walk1-msg-intake'
78f985f Merge branch 'research/frontend-perf-recheck'
8acbf43 docs(web): CONTEXT.md 同步 receipt_render 起点 agent-only 口径 (#520)
5ebc67f fix(web): receipt_render 起点仅记 agent 消息，人类消息不混入回执分布 (#520)
82f5a70 docs(bench): CONTEXT.md 沉淀 mainline-align 工具入口与口径 (#521)
979ec68 feat(bench): 频道主链路离线对齐工具——四段分布 + 单链明细 (#521)
efdf982 feat(web): 前端测量模块 clientPerf + 频道主链路 3 埋点落事件流 (#520)
b555ba1 docs(channels): CONTEXT.md 沉淀 traceId 三路径口径 (#519)
c7d1922 feat(channels): traceId 三条派单路径补齐，全链路统一关联键 (#519)
6983f61 docs(adr): 频道主链路流程与性能优化决策集 + 分级清单（#504 定稿，#513）
f8df559 docs: 频道前端性能治理复核——取数纪律漏管行动中心 store（#512）
fbaf640 docs: 走查③认领延迟研究报告 + bench（#508）
d2e9320 docs: 走查②路由派单 routeMessage 链路性能走查报告 + bench（#507）
fcc73e3 docs: 走查⑤页面加载读路径成本研究报告 + bench（#510）
d598aaf docs: 走查⑥流转链路频道可感知段研究报告（#511）
Test plan
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