diff --git a/.task/feature-agent-stack-q3.md b/.task/feature-agent-stack-q3.md
index 36b3505e..53bb1547 100644
--- a/.task/feature-agent-stack-q3.md
+++ b/.task/feature-agent-stack-q3.md
@@ -405,3 +405,79 @@ group-chat 的 LLM 选人策略；A2A 之外的跨系统协议。
   "receipt_sha256": "649f384f94e357bef24a463dc7d9a6d9a56e2c8ee50e8ad064e8c2fe31dff20c"
 }
 ```
+
+<!-- Local receipt: SELF. Digests detect corruption; they do not authenticate a reviewer or CI. -->
+```json
+{
+  "schema": 1,
+  "source": "SELF",
+  "timestamp": "2026-10-08T04:03:43.832459+00:00",
+  "command": "make test",
+  "command_sha256": "22cc66aa7d2624b4eb4d5b61658614cd6c32477b123afbf7dbc7fc3d7d0f3713",
+  "cwd": "/home/weichen/projects/Agent-System-Dev-wt-feature-agent-stack-q3",
+  "common_dir": "/home/weichen/projects/Agent-System-Dev/.git",
+  "before": {
+    "head": "46be89c0c5d02bc6467fdcf70c62cf54887b000d",
+    "branch": "feature/agent-stack-q3",
+    "target_branch": "main",
+    "target_head": "78409a9ceacacf8a152b811d94c7195c4f084664",
+    "status": " M modules/backend\n",
+    "tracked_diff_sha256": "7ed839626a017e6c2c55f9434c6f01781ed5ec038bf7b127af2fdee1eb211214",
+    "untracked": {},
+    "submodules": " cc1ad7749816afe129f81bcf0732d0ca7c789d10 deps/agent-command (remotes/origin/feature/core-v0-1-gcc1ad77)\n ed2af3e6048928b1fd0ba6da1f9d0c1bafec82d4 deps/agent-command/deps/development-guidelines (remotes/origin/feature/delivery-mechanism-5-ged2af3e)\n 343b1e6d9a5b58e47bf7e594826221036ae8175c deps/agent-intent (heads/main)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 deps/agent-intent/deps/development-guidelines (26b562d)\n a3ee67bba269e1276c14e22c026171ecf2cf6190 deps/agent-intent/deps/error-code-system (a3ee67b)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 deps/agent-intent/deps/error-code-system/deps/development-guidelines (26b562d)\n 49b5d8be604d05e4246dffa0d10fa1c2b7ad45d7 deps/agent-intent/deps/logging-system (49b5d8b)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 deps/agent-intent/deps/logging-system/deps/development-guidelines (26b562d)\n 37c5e6fbd65c69cc794ce476f3bed020aafd9eef deps/agent-native (remotes/origin/HEAD)\n 343b1e6d9a5b58e47bf7e594826221036ae8175c 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+  },
+  "after": {
+    "head": "46be89c0c5d02bc6467fdcf70c62cf54887b000d",
+    "branch": "feature/agent-stack-q3",
+    "target_branch": "main",
+    "target_head": "78409a9ceacacf8a152b811d94c7195c4f084664",
+    "status": " M modules/backend\n",
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+    "untracked": {},
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deps/agent-squad/deps/agent-native/deps/development-guidelines (26b562d)\n a3ee67bba269e1276c14e22c026171ecf2cf6190 deps/agent-squad/deps/agent-native/deps/error-code-system (a3ee67b)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 deps/agent-squad/deps/agent-native/deps/error-code-system/deps/development-guidelines (26b562d)\n 49b5d8be604d05e4246dffa0d10fa1c2b7ad45d7 deps/agent-squad/deps/agent-native/deps/logging-system (49b5d8b)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 deps/agent-squad/deps/agent-native/deps/logging-system/deps/development-guidelines (26b562d)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 deps/agent-squad/deps/development-guidelines (26b562d)\n a3ee67bba269e1276c14e22c026171ecf2cf6190 deps/agent-squad/deps/error-code-system (a3ee67b)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 deps/agent-squad/deps/error-code-system/deps/development-guidelines (26b562d)\n 49b5d8be604d05e4246dffa0d10fa1c2b7ad45d7 deps/agent-squad/deps/logging-system (49b5d8b)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 deps/agent-squad/deps/logging-system/deps/development-guidelines (26b562d)\n af199eeaa23c5b39e08b4649f2513d7572dc5274 deps/development-guidelines (heads/main)\n a3ee67bba269e1276c14e22c026171ecf2cf6190 deps/error-code-system (a3ee67b)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 deps/error-code-system/deps/development-guidelines (26b562d)\n 49b5d8be604d05e4246dffa0d10fa1c2b7ad45d7 deps/logging-system (49b5d8b)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 deps/logging-system/deps/development-guidelines (26b562d)\n fe7c245f5c2876b19258d044104e65bb47425099 modules/backend (v0.1.0-83-gfe7c245)\n cc1ad7749816afe129f81bcf0732d0ca7c789d10 modules/backend/deps/agent-command (remotes/origin/feature/core-v0-1-gcc1ad77)\n ed2af3e6048928b1fd0ba6da1f9d0c1bafec82d4 modules/backend/deps/agent-command/deps/development-guidelines (remotes/origin/feature/delivery-mechanism-5-ged2af3e)\n 343b1e6d9a5b58e47bf7e594826221036ae8175c modules/backend/deps/agent-intent 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modules/backend/deps/agent-native/deps/agent-intent/deps/error-code-system (a3ee67b)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 modules/backend/deps/agent-native/deps/agent-intent/deps/error-code-system/deps/development-guidelines (26b562d)\n 49b5d8be604d05e4246dffa0d10fa1c2b7ad45d7 modules/backend/deps/agent-native/deps/agent-intent/deps/logging-system (49b5d8b)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 modules/backend/deps/agent-native/deps/agent-intent/deps/logging-system/deps/development-guidelines (26b562d)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 modules/backend/deps/agent-native/deps/development-guidelines (26b562d)\n a3ee67bba269e1276c14e22c026171ecf2cf6190 modules/backend/deps/agent-native/deps/error-code-system (a3ee67b)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 modules/backend/deps/agent-native/deps/error-code-system/deps/development-guidelines (26b562d)\n 49b5d8be604d05e4246dffa0d10fa1c2b7ad45d7 modules/backend/deps/agent-native/deps/logging-system (49b5d8b)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 modules/backend/deps/agent-native/deps/logging-system/deps/development-guidelines (26b562d)\n 819b0c5f82751972ab30647c9ce65e03dff4e4d0 modules/backend/deps/agent-squad (remotes/origin/HEAD)\n 343b1e6d9a5b58e47bf7e594826221036ae8175c modules/backend/deps/agent-squad/deps/agent-intent (heads/main)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 modules/backend/deps/agent-squad/deps/agent-intent/deps/development-guidelines (26b562d)\n a3ee67bba269e1276c14e22c026171ecf2cf6190 modules/backend/deps/agent-squad/deps/agent-intent/deps/error-code-system (a3ee67b)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 modules/backend/deps/agent-squad/deps/agent-intent/deps/error-code-system/deps/development-guidelines (26b562d)\n 49b5d8be604d05e4246dffa0d10fa1c2b7ad45d7 modules/backend/deps/agent-squad/deps/agent-intent/deps/logging-system (49b5d8b)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 modules/backend/deps/agent-squad/deps/agent-intent/deps/logging-system/deps/development-guidelines (26b562d)\n+1ac21c68d4e2c2728d92d6db67a30ff06e0066d3 modules/backend/deps/agent-squad/deps/agent-native (heads/main)\n 343b1e6d9a5b58e47bf7e594826221036ae8175c modules/backend/deps/agent-squad/deps/agent-native/deps/agent-intent (heads/main)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 modules/backend/deps/agent-squad/deps/agent-native/deps/agent-intent/deps/development-guidelines (26b562d)\n a3ee67bba269e1276c14e22c026171ecf2cf6190 modules/backend/deps/agent-squad/deps/agent-native/deps/agent-intent/deps/error-code-system (a3ee67b)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 modules/backend/deps/agent-squad/deps/agent-native/deps/agent-intent/deps/error-code-system/deps/development-guidelines (26b562d)\n 49b5d8be604d05e4246dffa0d10fa1c2b7ad45d7 modules/backend/deps/agent-squad/deps/agent-native/deps/agent-intent/deps/logging-system (49b5d8b)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 modules/backend/deps/agent-squad/deps/agent-native/deps/agent-intent/deps/logging-system/deps/development-guidelines (26b562d)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 modules/backend/deps/agent-squad/deps/agent-native/deps/development-guidelines (26b562d)\n a3ee67bba269e1276c14e22c026171ecf2cf6190 modules/backend/deps/agent-squad/deps/agent-native/deps/error-code-system (a3ee67b)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 modules/backend/deps/agent-squad/deps/agent-native/deps/error-code-system/deps/development-guidelines (26b562d)\n 49b5d8be604d05e4246dffa0d10fa1c2b7ad45d7 modules/backend/deps/agent-squad/deps/agent-native/deps/logging-system (49b5d8b)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 modules/backend/deps/agent-squad/deps/agent-native/deps/logging-system/deps/development-guidelines (26b562d)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 modules/backend/deps/agent-squad/deps/development-guidelines (26b562d)\n a3ee67bba269e1276c14e22c026171ecf2cf6190 modules/backend/deps/agent-squad/deps/error-code-system (a3ee67b)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 modules/backend/deps/agent-squad/deps/error-code-system/deps/development-guidelines (26b562d)\n 49b5d8be604d05e4246dffa0d10fa1c2b7ad45d7 modules/backend/deps/agent-squad/deps/logging-system (49b5d8b)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 modules/backend/deps/agent-squad/deps/logging-system/deps/development-guidelines (26b562d)\n a253a40b8e5563119b00c4e71fb61fe0d11d6d6a modules/backend/deps/agent-system-core (v0.1.0-9-ga253a40)\n a3ee67bba269e1276c14e22c026171ecf2cf6190 modules/backend/deps/error-code-system (a3ee67b)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 modules/backend/deps/error-code-system/deps/development-guidelines (26b562d)\n 49b5d8be604d05e4246dffa0d10fa1c2b7ad45d7 modules/backend/deps/logging-system (49b5d8b)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 modules/backend/deps/logging-system/deps/development-guidelines (26b562d)\n a253a40b8e5563119b00c4e71fb61fe0d11d6d6a modules/core (v0.1.0-9-ga253a40)\n 16795ed59820eee1d36efe6564e13a2f5a6387a6 modules/documents (heads/main)\n 84b73ab32848e623d0a0ab7ade552784dca8cf3c modules/frontend (v0.1.0-2-g84b73ab)\n 76d6633736a7abb36ac1ecca42fe4e6f120d0558 modules/ui (v0.1.0-4-g76d6633)\n"
+  },
+  "after_error": null,
+  "exit_code": 2,
+  "output": "make[1]: Entering directory '/home/weichen/projects/Agent-System-Dev-wt-feature-agent-stack-q3'\npython3 scripts/check-worktree.py verify\nERROR: unsaved, untracked files in /home/weichen/projects/Agent-System-Dev-wt-feature-agent-stack-q3/modules/backend; preserve them before continuing\nmake[1]: *** [Makefile:143: test-worktree] Error 1\nmake[1]: Leaving directory '/home/weichen/projects/Agent-System-Dev-wt-feature-agent-stack-q3'\n",
+  "output_sha256": "c2d3a8cc8db59697edf6bc2f83c852dd779048ef78d1d2dabb8c541517a60971",
+  "receipt_sha256": "f712e26cd5c3aea373fc2c8b0ac52744fefc707867caf40b7158aa8c86d8fb9b"
+}
+```
+
+<!-- Local receipt: SELF. Digests detect corruption; they do not authenticate a reviewer or CI. -->
+```json
+{
+  "schema": 1,
+  "source": "SELF",
+  "timestamp": "2026-10-08T04:04:39.180910+00:00",
+  "command": "make test",
+  "command_sha256": "22cc66aa7d2624b4eb4d5b61658614cd6c32477b123afbf7dbc7fc3d7d0f3713",
+  "cwd": "/home/weichen/projects/Agent-System-Dev-wt-feature-agent-stack-q3",
+  "common_dir": "/home/weichen/projects/Agent-System-Dev/.git",
+  "before": {
+    "head": "46be89c0c5d02bc6467fdcf70c62cf54887b000d",
+    "branch": "feature/agent-stack-q3",
+    "target_branch": "main",
+    "target_head": "78409a9ceacacf8a152b811d94c7195c4f084664",
+    "status": " M .task/feature-agent-stack-q3.md\n M modules/backend\n",
+    "tracked_diff_sha256": "c0802e6f79f6abe7fb9bebbb898d4022e4aae5f58ac5c9326efda32fb8f05ef9",
+    "untracked": {},
+    "submodules": " cc1ad7749816afe129f81bcf0732d0ca7c789d10 deps/agent-command (remotes/origin/feature/core-v0-1-gcc1ad77)\n ed2af3e6048928b1fd0ba6da1f9d0c1bafec82d4 deps/agent-command/deps/development-guidelines (remotes/origin/feature/delivery-mechanism-5-ged2af3e)\n 343b1e6d9a5b58e47bf7e594826221036ae8175c deps/agent-intent (heads/main)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 deps/agent-intent/deps/development-guidelines (26b562d)\n a3ee67bba269e1276c14e22c026171ecf2cf6190 deps/agent-intent/deps/error-code-system (a3ee67b)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 deps/agent-intent/deps/error-code-system/deps/development-guidelines (26b562d)\n 49b5d8be604d05e4246dffa0d10fa1c2b7ad45d7 deps/agent-intent/deps/logging-system (49b5d8b)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 deps/agent-intent/deps/logging-system/deps/development-guidelines (26b562d)\n 37c5e6fbd65c69cc794ce476f3bed020aafd9eef deps/agent-native (remotes/origin/HEAD)\n 343b1e6d9a5b58e47bf7e594826221036ae8175c 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modules/backend/deps/agent-squad/deps/agent-intent/deps/logging-system/deps/development-guidelines (26b562d)\n+1ac21c68d4e2c2728d92d6db67a30ff06e0066d3 modules/backend/deps/agent-squad/deps/agent-native (heads/main)\n 343b1e6d9a5b58e47bf7e594826221036ae8175c modules/backend/deps/agent-squad/deps/agent-native/deps/agent-intent (heads/main)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 modules/backend/deps/agent-squad/deps/agent-native/deps/agent-intent/deps/development-guidelines (26b562d)\n a3ee67bba269e1276c14e22c026171ecf2cf6190 modules/backend/deps/agent-squad/deps/agent-native/deps/agent-intent/deps/error-code-system (a3ee67b)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 modules/backend/deps/agent-squad/deps/agent-native/deps/agent-intent/deps/error-code-system/deps/development-guidelines (26b562d)\n 49b5d8be604d05e4246dffa0d10fa1c2b7ad45d7 modules/backend/deps/agent-squad/deps/agent-native/deps/agent-intent/deps/logging-system (49b5d8b)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 modules/backend/deps/agent-squad/deps/agent-native/deps/agent-intent/deps/logging-system/deps/development-guidelines (26b562d)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 modules/backend/deps/agent-squad/deps/agent-native/deps/development-guidelines (26b562d)\n a3ee67bba269e1276c14e22c026171ecf2cf6190 modules/backend/deps/agent-squad/deps/agent-native/deps/error-code-system (a3ee67b)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 modules/backend/deps/agent-squad/deps/agent-native/deps/error-code-system/deps/development-guidelines (26b562d)\n 49b5d8be604d05e4246dffa0d10fa1c2b7ad45d7 modules/backend/deps/agent-squad/deps/agent-native/deps/logging-system (49b5d8b)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 modules/backend/deps/agent-squad/deps/agent-native/deps/logging-system/deps/development-guidelines (26b562d)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 modules/backend/deps/agent-squad/deps/development-guidelines (26b562d)\n a3ee67bba269e1276c14e22c026171ecf2cf6190 modules/backend/deps/agent-squad/deps/error-code-system (a3ee67b)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 modules/backend/deps/agent-squad/deps/error-code-system/deps/development-guidelines (26b562d)\n 49b5d8be604d05e4246dffa0d10fa1c2b7ad45d7 modules/backend/deps/agent-squad/deps/logging-system (49b5d8b)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 modules/backend/deps/agent-squad/deps/logging-system/deps/development-guidelines (26b562d)\n a253a40b8e5563119b00c4e71fb61fe0d11d6d6a modules/backend/deps/agent-system-core (v0.1.0-9-ga253a40)\n a3ee67bba269e1276c14e22c026171ecf2cf6190 modules/backend/deps/error-code-system (a3ee67b)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 modules/backend/deps/error-code-system/deps/development-guidelines (26b562d)\n 49b5d8be604d05e4246dffa0d10fa1c2b7ad45d7 modules/backend/deps/logging-system (49b5d8b)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 modules/backend/deps/logging-system/deps/development-guidelines (26b562d)\n a253a40b8e5563119b00c4e71fb61fe0d11d6d6a modules/core (v0.1.0-9-ga253a40)\n 16795ed59820eee1d36efe6564e13a2f5a6387a6 modules/documents (heads/main)\n 84b73ab32848e623d0a0ab7ade552784dca8cf3c modules/frontend (v0.1.0-2-g84b73ab)\n 76d6633736a7abb36ac1ecca42fe4e6f120d0558 modules/ui (v0.1.0-4-g76d6633)\n"
+  },
+  "after_error": null,
+  "exit_code": 2,
+  "output": "make[1]: Entering directory '/home/weichen/projects/Agent-System-Dev-wt-feature-agent-stack-q3'\npython3 scripts/check-worktree.py verify\nERROR: unsaved, untracked files in /home/weichen/projects/Agent-System-Dev-wt-feature-agent-stack-q3/modules/backend; preserve them before continuing\nmake[1]: *** [Makefile:143: test-worktree] Error 1\nmake[1]: Leaving directory '/home/weichen/projects/Agent-System-Dev-wt-feature-agent-stack-q3'\n",
+  "output_sha256": "c2d3a8cc8db59697edf6bc2f83c852dd779048ef78d1d2dabb8c541517a60971",
+  "receipt_sha256": "5799f248b436754eeb2aabbfd1d8fc0ad1df9f108fad0f391defd4b2581eb129"
+}
+```