diff --git a/.task/feature-agent-stack-q2.md b/.task/feature-agent-stack-q2.md
index a849aa11..abd2bf97 100644
--- a/.task/feature-agent-stack-q2.md
+++ b/.task/feature-agent-stack-q2.md
@@ -191,3 +191,41 @@ group-chat 的 LLM 选人策略；Q3 全部内容（另行任务）。
 }
 ```
 | 同步前验收 | 1e85198578d8052c063c06c33fe0632ab01c213f | cbc369604dee8eeadf439747d8172d1243cc7e85 | 2026-10-08T01:39:06Z |
+
+<!-- Local receipt: SELF. Digests detect corruption; they do not authenticate a reviewer or CI. -->
+```json
+{
+  "schema": 1,
+  "source": "SELF",
+  "timestamp": "2026-10-08T01:39:18.758627+00:00",
+  "command": "make precheck",
+  "command_sha256": "8fd03cdee8adbb8562846a1a114cc0623779a8654412cd20aac9b495e7eb0450",
+  "cwd": "/home/weichen/projects/Agent-System-Dev-wt-feature-agent-stack-q2",
+  "common_dir": "/home/weichen/projects/Agent-System-Dev/.git",
+  "before": {
+    "head": "8c736fe9156c00c8e3ee8fb1ed5344d74e446eb4",
+    "branch": "feature/agent-stack-q2",
+    "target_branch": "main",
+    "target_head": "1e85198578d8052c063c06c33fe0632ab01c213f",
+    "status": "",
+    "tracked_diff_sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+    "untracked": {},
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+  },
+  "after": {
+    "head": "8c736fe9156c00c8e3ee8fb1ed5344d74e446eb4",
+    "branch": "feature/agent-stack-q2",
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a253a40b8e5563119b00c4e71fb61fe0d11d6d6a modules/core (v0.1.0-9-ga253a40)\n 16795ed59820eee1d36efe6564e13a2f5a6387a6 modules/documents (remotes/origin/HEAD)\n 84b73ab32848e623d0a0ab7ade552784dca8cf3c modules/frontend (v0.1.0-2-g84b73ab)\n 76d6633736a7abb36ac1ecca42fe4e6f120d0558 modules/ui (v0.1.0-4-g76d6633)\n"
+  },
+  "after_error": null,
+  "exit_code": 0,
+  "output": "make[1]: Entering directory '/home/weichen/projects/Agent-System-Dev-wt-feature-agent-stack-q2'\n[repo]   branch=feature/agent-stack-q2 head=8c736fe915\n[remote] origin/main=1e85198578 ahead=4 behind=0\n[tree]   clean submodules_drift=0 uninit=0\n[worktrees] linked=2\n[recycle] merged un-recycled branches: feature/card-close-20261006-151458Z feature/card-close-20261006-154307Z feature/card-close-20261007-115847Z feature/card-close-20261007-143542Z feature/card-close-20261007-180944Z\n[hooks]   core.hooksPath=scripts/hooks（pre-commit/post-merge 实际接线）\n[facts]   policy/facts.md 4 条事实均在有效期内\n[required-reading] core/baseline.md, workflows/delivery.md §1, policy/delivery.md\n[R0] 1e85198578（完整：1e85198578d8052c063c06c33fe0632ab01c213f）\n[worktree] before-sync: recursive component checks passed\n[verdict] READY — 保留本次 precheck receipt 后建任务工作区：PRECHECK_RECEIPT=/tmp/task-precheck.json make task-start NAME=feature/your-branch\nmake[1]: Leaving directory '/home/weichen/projects/Agent-System-Dev-wt-feature-agent-stack-q2'\n",
+  "output_sha256": "88b9f16bc209b0f98fb39b7a168ea42c19411a3020576c93c2ccefb22919cecc",
+  "receipt_sha256": "22e04a512ac374a6f704c1313b023afe186b62935666ba4a075304de71797079"
+}
+```