diff --git a/.task/feature-fast-slow-u2-u3-plan.md b/.task/feature-fast-slow-u2-u3-plan.md
index 8e7b5538..5353e40a 100644
--- a/.task/feature-fast-slow-u2-u3-plan.md
+++ b/.task/feature-fast-slow-u2-u3-plan.md
@@ -195,3 +195,79 @@
 }
 ```
 | 同步前验收 | 5212fef01e59b7f9e12fa7fc42cd987c6792a786 | 788c2c8f775e3625b0f1e18eb3bd9e850c6aa7e9 | 2026-10-12T23:46:00Z |
+
+<!-- Local receipt: SELF. Digests detect corruption; they do not authenticate a reviewer or CI. -->
+```json
+{
+  "schema": 1,
+  "source": "SELF",
+  "timestamp": "2026-10-12T23:45:33.666860+00:00",
+  "command": "make task-sync",
+  "command_sha256": "6c0e3c8fbb3f43d01548180c9d9c147ce1c1c32ba1e78d3383961de470fe0d52",
+  "cwd": "/home/weichen/projects/Agent-System-Dev-wt-feature-fast-slow-u2-u3-plan",
+  "common_dir": "/home/weichen/projects/Agent-System-Dev/.git",
+  "before": {
+    "head": "788c2c8f775e3625b0f1e18eb3bd9e850c6aa7e9",
+    "branch": "feature/fast-slow-u2-u3-plan",
+    "target_branch": "main",
+    "target_head": "5212fef01e59b7f9e12fa7fc42cd987c6792a786",
+    "status": "",
+    "tracked_diff_sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+    "untracked": {},
+    "submodules": " 4f583ca3eeeb07a56a714c5086de84dcd6ad2980 deps/agent-command (heads/main)\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 c348441691e8bdab784a03aa9be64d53dacff341 deps/agent-native (heads/main)\n 343b1e6d9a5b58e47bf7e594826221036ae8175c deps/agent-native/deps/agent-intent 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+  },
+  "after": {
+    "head": "80663e91b42f0a06f3506596f0b4a9a54c31ac1f",
+    "branch": "feature/fast-slow-u2-u3-plan",
+    "target_branch": "main",
+    "target_head": "5212fef01e59b7f9e12fa7fc42cd987c6792a786",
+    "status": "",
+    "tracked_diff_sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+    "untracked": {},
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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 0f192a481388184df39f81c28b0587a7e16ec3ca modules/backend (v0.3.0-138-g0f192a4)\n 4f583ca3eeeb07a56a714c5086de84dcd6ad2980 modules/backend/deps/agent-command (heads/main)\n ed2af3e6048928b1fd0ba6da1f9d0c1bafec82d4 modules/backend/deps/agent-command/deps/development-guidelines (remotes/origin/feature/delivery-mechanism-5-ged2af3e)\n 343b1e6d9a5b58e47bf7e594826221036ae8175c modules/backend/deps/agent-intent (heads/main)\n 26b562d2e34fbc560711296a309c91c74ffc55b1 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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 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modules/backend/deps/agent-squad/deps/agent-intent/deps/logging-system/deps/development-guidelines (26b562d)\n c348441691e8bdab784a03aa9be64d53dacff341 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 ba289e7b1780a29855aef8477bf1ac49bd563eb2 modules/backend/deps/agent-system-core (v0.3.0-10-gba289e7)\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 ba289e7b1780a29855aef8477bf1ac49bd563eb2 modules/core (v0.3.0-10-gba289e7)\n c2b17f620b150c543267f896abc0c18396036590 modules/documents (heads/feature/fast-slow-u2-u3-plan)\n 43d1933b8c3377ae548eb495305e9f0de29dcb59 modules/frontend (v0.3.0-74-g43d1933)\n 0da2e3acd6c8ae8957825b64ddb54b250c0979c0 modules/ui (v0.3.0-29-g0da2e3a)\n"
+  },
+  "after_error": null,
+  "exit_code": 0,
+  "output": "make[1]: Entering directory '/home/weichen/projects/Agent-System-Dev-wt-feature-fast-slow-u2-u3-plan'\n[worktree] before-sync: recursive component checks passed\nAlready up to date.\n[worktree] before-update: recursive component checks passed\n[worktree] materialize: recursive component checks passed\n[worktree] after-sync: recursive component checks passed\n[evidence] WARN JSON receipt line 85: recorded HEAD predates non-card changes ——关键检查须重跑并以 make evidence 重新写入\n[evidence] WARN JSON receipt line 123: recorded HEAD predates non-card changes ——关键检查须重跑并以 make evidence 重新写入\n[evidence] WARN JSON receipt line 161: unverified: recorded object includes uncommitted non-card changes ——关键检查须重跑并以 make evidence 重新写入\n[synced] sync_base=5212fef01e tested_head=788c2c8f77 checked_at=2026-10-12T23:46:00Z\n[next] 跑正式验收（make test 等），证据写入任务卡\nmake[1]: Leaving directory '/home/weichen/projects/Agent-System-Dev-wt-feature-fast-slow-u2-u3-plan'\n",
+  "output_sha256": "6e2b92101a5f293dea76df41b3bfdef6965078f68ce531a25e23806a89b26b39",
+  "receipt_sha256": "1f1adbfa2c79f445c26e7e3086a41c6b129a00634caad305ba80e15d3d719386"
+}
+```
+
+<!-- Local receipt: SELF. Digests detect corruption; they do not authenticate a reviewer or CI. -->
+```json
+{
+  "schema": 1,
+  "source": "SELF",
+  "timestamp": "2026-10-12T23:45:34.793338+00:00",
+  "command": "python3 /tmp/fast-slow-u2-u3-doc-check-20261013.py",
+  "command_sha256": "8dfc992648dbedd6e5f71d09e7229fe535295d824ee21d2e128fab4830a48bbb",
+  "cwd": "/home/weichen/projects/Agent-System-Dev-wt-feature-fast-slow-u2-u3-plan",
+  "common_dir": "/home/weichen/projects/Agent-System-Dev/.git",
+  "before": {
+    "head": "788c2c8f775e3625b0f1e18eb3bd9e850c6aa7e9",
+    "branch": "feature/fast-slow-u2-u3-plan",
+    "target_branch": "main",
+    "target_head": "5212fef01e59b7f9e12fa7fc42cd987c6792a786",
+    "status": "",
+    "tracked_diff_sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+    "untracked": {},
+    "submodules": " 4f583ca3eeeb07a56a714c5086de84dcd6ad2980 deps/agent-command (heads/main)\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 c348441691e8bdab784a03aa9be64d53dacff341 deps/agent-native (heads/main)\n 343b1e6d9a5b58e47bf7e594826221036ae8175c deps/agent-native/deps/agent-intent 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26b562d2e34fbc560711296a309c91c74ffc55b1 modules/backend/deps/agent-native/deps/logging-system/deps/development-guidelines (26b562d)\n 490b0b2dfa1567cb16ff7a7230fd78e52bc2938e modules/backend/deps/agent-squad (heads/main)\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 c348441691e8bdab784a03aa9be64d53dacff341 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 ba289e7b1780a29855aef8477bf1ac49bd563eb2 modules/backend/deps/agent-system-core (v0.3.0-10-gba289e7)\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 ba289e7b1780a29855aef8477bf1ac49bd563eb2 modules/core (v0.3.0-10-gba289e7)\n c2b17f620b150c543267f896abc0c18396036590 modules/documents (heads/feature/fast-slow-u2-u3-plan)\n 43d1933b8c3377ae548eb495305e9f0de29dcb59 modules/frontend (v0.3.0-74-g43d1933)\n 0da2e3acd6c8ae8957825b64ddb54b250c0979c0 modules/ui (v0.3.0-29-g0da2e3a)\n"
+  },
+  "after_error": null,
+  "exit_code": 0,
+  "output": "{\"plan\": \"/home/weichen/projects/Agent-System-Dev-wt-feature-fast-slow-u2-u3-plan/modules/documents/docs/proposals/2026-10-13-fast-slow-u2-u3-plan.md\", \"tasks\": 7, \"requirements\": [\"R03-b\", \"R03-c\", \"R04\", \"R05\", \"R06\", \"R07\", \"R09\", \"R10\", \"R12\", \"R14\", \"R17\"], \"relative_links\": [{\"from\": \"modules/documents/docs/proposals/2026-10-13-fast-slow-u2-u3-plan.md\", \"target\": \"2026-10-12-fast-slow-channel-display.md\"}, {\"from\": \"modules/documents/docs/proposals/2026-10-13-fast-slow-u2-u3-plan.md\", \"target\": \"2026-10-12-work-companion-ui-design.md\"}, {\"from\": \"modules/documents/docs/proposals/2026-10-13-fast-slow-u2-u3-plan.md\", \"target\": \"2026-10-12-work-companion-ui-plan.md\"}, {\"from\": \"PROJECT.md\", \"target\": \"modules/documents/docs/proposals/2026-10-13-fast-slow-u2-u3-plan.md\"}, {\"from\": \"modules/documents/docs/proposals/INDEX.md\", \"target\": \"2026-10-13-fast-slow-u2-u3-plan.md\"}], \"whitespace\": \"pass\", \"scope\": \"plan-only; no business or live-model checks executed\"}\n",
+  "output_sha256": "322bcca857e578b7cdf8210f4e6284d62f5bfefba9b59b75752c4afbdb0d3872",
+  "receipt_sha256": "05a28a8d3029cb6485eedc7edacdea8759c07658b96379445fa13d7b438ad624"
+}
+```