diff --git a/.task/feature-agent-quality-phase04.md b/.task/archive/feature-agent-quality-phase04.md
similarity index 99%
rename from .task/feature-agent-quality-phase04.md
rename to .task/archive/feature-agent-quality-phase04.md
index 1b0d2534..029caefe 100644
--- a/.task/feature-agent-quality-phase04.md
+++ b/.task/archive/feature-agent-quality-phase04.md
@@ -1,6 +1,6 @@
 # feature/agent-quality-phase04 任务卡
 
-任务主记录：Backend #121（组件）+ Dev PR（本分支收口）；状态：已完成；owner：weichen
+任务主记录：PR #290 https://git-home.u1680832.nyat.app:30319/weichen/Agent-System-Dev/pulls/290（merge b7489d4431）；状态：已完成（回填）；owner：weichen
 
 ## 基线与授权
 
@@ -293,3 +293,9 @@
   "receipt_sha256": "882a64be2d287b4728dd58c4380669d5ae63c4e92a65274e35ab112583320a02"
 }
 ```
+
+## 闭合记录（card-autoclose 回填）
+
+- 依据：merge b7489d4431e510c7856fcabe7f060dc0472894a2（PR #290）已包含于 origin/main，分支成果已落盘；本段为合入后回填。
+- 合并主题：Merge pull request 'Quality phase04: working-method prompts, compose demotion (Backend #121)' (#290) from feature/agent-quality-phase04 into main
+- 归档：随闭合移入 .task/archive/；任务执行期的过程证据见原任务记录与 PR。