Agent-System/.doc/ops/short-term/2026-09-17-w6-fav-subscriber-shadow.md

title, status, created, updated, owner, branch, worktree, mutex

title	status	created	updated	owner	branch	worktree	mutex
W6 FAV subscriber shadow	done	2026-09-17	2026-09-17	Cursor	feature/w6-fav-subscriber-shadow	-	events

W6 FAV subscriber shadow

目标

手工移植 FAV subscriber shadow：只计算 intended outcome，不写业务副作用；FAV_DEGRADED_READ=false；FAV_PUBLISHER_ENABLED 默认 false。矩阵保持 partial。

范围

• ObserveShadow 只读计算
• vault status / CLI 标明 shadow 与 live 未放量
• 负例：degraded read 拒绝；HandleLease / Register(fav) 仍 fail-closed

非目标

• 整支 merge feature/final-artifact-vault
• live staging → artifact → publication
• 启用 FAV_DEGRADED_READ
• 升 FEATURE-MATRIX FAV 为 done

步骤

1. ObserveShadow + 负例单测
2. 冒烟 + 报告（live 未放量）
3. 合 dev；矩阵保持 partial

验收标准

• WouldStage / WouldPublish 恒 false
• FAV_DEGRADED_READ=true 时 shadow 拒绝
• 报告写清 shadow 证据与「live 未放量」

相关链接

• Remaining port: ../../audit/2026-09-16-fav-u7-remaining-port.md
• U7 报告: ../../test-reports/2026-09-16-fav-u7-incremental-test-report.md
• Test report: ../../test-reports/2026-09-17-w6-fav-subscriber-shadow-test-report.md

证据 / 备注

不占 live 观察窗；≥7 天窗口仍属后续 live 切片。