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refactor(hooks): tighten the hook-protocol contract surface

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Implement the tighten-hook-protocol-contract RFC (moved to implemented/):

- HookDialect narrows to 'claude' | 'codex': the 'native' variant had zero
  producers (native plugins on the seams write no hook/* provenance), and the
  dialect is defined as the bridge that ran the hook.
- HookOutput.suppressOutput is gone: the codec parsed it and every path
  discarded it with no warn and no deferral — hook stdout never enters a
  transcript, so there is nothing to suppress.
- hook/result.durationMs is gone: durable timing telemetry with no reader
  that the snapshot normalizer had to scrub as replay noise. With no duration
  to measure, runHook loses its injected now clock and the single-field
  RunHookResult wrapper — it returns the HookOutput directly. The committed
  hook fixtures had the field stripped mechanically (field-only diff); the
  stdout goldens never carried it.
- The bridges' double-defaulted defaultTimeoutMs config knob is replaced by
  one reference-default constant, DEFAULT_HOOK_TIMEOUT_MS, exported from the
  lib's runner and applied inside runHook; per-hook timeoutSec stays the
  override surface.
- The hook/result semantics move into the lib that declares the event:
  HookResultRecord now carries the decoded HookOutput and appendHookResult
  derives the decision string (decision ?? stop-on-continue:false ?? pass)
  and the 500-char stderrSummary truncation; both bridges delete their
  byte-identical private copies. The snapshot suite passes against the
  existing goldens, proving the derived values are unchanged.
- Rider: BLOCKING_EXIT_CODE is codec-internal again (zero importers).

Amend the hook-protocol-lib and hook-snapshot-matrix RFCs to the new facts,
update the lib/bridge READMEs and the session.md event tables, and retarget
the affected unit tests (including new lib-level coverage of the derivation
rules).
This commit is contained in:
Tianyi Cui
2026-07-04 15:44:26 +08:00
parent 226a8b5e4c
commit cd49670f4e
36 changed files with 233 additions and 235 deletions
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6
examples/acp-agent/tests/snapshots/hook-cc-posttool-block/session.jsonl
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@@ -61,7 +61,7 @@
{"type":"assistant/message","seq":59,"time":1783095159852,"data":{"turn":1,"step":1,"content":[{"type":"reasoning","text":"The user wants me to run the command `echo HELLO` using the bash tool and report the result verbatim."},{"type":"tool-call","id":"call_00_e9zAlNQhIVFKzoStUuWI7161","name":"bash","arguments":"{\"command\": \"echo HELLO\", \"description\": \"Run echo HELLO\"}"}],"usage":{"inputTokens":72,"outputTokens":91,"cacheReadTokens":1664,"reasoningTokens":25}},"sourceEventSeqs":[3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58],"surfaceOp":"append"}
{"type":"tool/call","seq":60,"time":1783095159852,"data":{"turn":1,"step":1,"callId":"call_00_e9zAlNQhIVFKzoStUuWI7161","name":"bash","arguments":"{\"command\": \"echo HELLO\", \"description\": \"Run echo HELLO\"}"}}
{"type":"hook/invoked","seq":61,"time":1783095159867,"data":{"turn":1,"point":"PostToolUse","dialect":"claude","handlerId":"claude:PostToolUse:1","matcher":"bash"}}
{"type":"hook/result","seq":62,"time":1783095159875,"data":{"turn":1,"point":"PostToolUse","handlerId":"claude:PostToolUse:1","decision":"block","exitCode":2,"stderrSummary":"tool output rejected by policy: rerun with a summary instead","durationMs":7.870597999999973}}
{"type":"hook/result","seq":62,"time":1783095159875,"data":{"turn":1,"point":"PostToolUse","handlerId":"claude:PostToolUse:1","decision":"block","exitCode":2,"stderrSummary":"tool output rejected by policy: rerun with a summary instead"}}
{"type":"tool/result","seq":63,"time":1783095159875,"data":{"turn":1,"step":1,"callId":"call_00_e9zAlNQhIVFKzoStUuWI7161","content":[{"type":"text","text":"tool output rejected by policy: rerun with a summary instead"}],"isError":true},"sourceEventSeqs":[60],"surfaceOp":"append"}
{"type":"step/end","seq":64,"time":1783095159875,"data":{"turn":1,"step":1}}
{"type":"step/start","seq":65,"time":1783095159876,"data":{"turn":1,"step":2}}
@@ -166,7 +166,7 @@
{"type":"assistant/message","seq":164,"time":1783095161879,"data":{"turn":1,"step":2,"content":[{"type":"reasoning","text":"The tool output was rejected by policy. I need to rerun with a description/summary. Let me try again - I already included a description. Let me check if maybe the description needs to be more descriptive, or if there's another issue.\n\nLet me try again with a slightly different approach to see what happens."},{"type":"tool-call","id":"call_00_SFRulyHdhTsyfllc6Gro3716","name":"bash","arguments":"{\"command\": \"echo HELLO\", \"description\": \"Echo the string HELLO\"}"}],"usage":{"inputTokens":187,"outputTokens":133,"cacheReadTokens":1664,"reasoningTokens":65}},"sourceEventSeqs":[66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163],"surfaceOp":"append"}
{"type":"tool/call","seq":165,"time":1783095161879,"data":{"turn":1,"step":2,"callId":"call_00_SFRulyHdhTsyfllc6Gro3716","name":"bash","arguments":"{\"command\": \"echo HELLO\", \"description\": \"Echo the string HELLO\"}"}}
{"type":"hook/invoked","seq":166,"time":1783095161893,"data":{"turn":1,"point":"PostToolUse","dialect":"claude","handlerId":"claude:PostToolUse:2","matcher":"bash"}}
{"type":"hook/result","seq":167,"time":1783095161902,"data":{"turn":1,"point":"PostToolUse","handlerId":"claude:PostToolUse:2","decision":"block","exitCode":2,"stderrSummary":"tool output rejected by policy: rerun with a summary instead","durationMs":8.773494000000028}}
{"type":"hook/result","seq":167,"time":1783095161902,"data":{"turn":1,"point":"PostToolUse","handlerId":"claude:PostToolUse:2","decision":"block","exitCode":2,"stderrSummary":"tool output rejected by policy: rerun with a summary instead"}}
{"type":"tool/result","seq":168,"time":1783095161902,"data":{"turn":1,"step":2,"callId":"call_00_SFRulyHdhTsyfllc6Gro3716","content":[{"type":"text","text":"tool output rejected by policy: rerun with a summary instead"}],"isError":true},"sourceEventSeqs":[165],"surfaceOp":"append"}
{"type":"step/end","seq":169,"time":1783095161903,"data":{"turn":1,"step":2}}
{"type":"step/start","seq":170,"time":1783095161903,"data":{"turn":1,"step":3}}
@@ -282,7 +282,7 @@
{"type":"assistant/message","seq":280,"time":1783095163935,"data":{"turn":1,"step":3,"content":[{"type":"reasoning","text":"It seems the tool output is being rejected by policy repeatedly. Let me try a different command or approach - perhaps the issue is unrelated to my command. Let me try with a longer description or a different format.\n\nActually, I think the policy rejection might be about the content/output being shown. Let me try running it and just report what I know.\n\nLet me try one more time."},{"type":"tool-call","id":"call_00_9CQs2NzrhnwYjdvmjsR10424","name":"bash","arguments":"{\"command\": \"echo HELLO\", \"description\": \"Print HELLO to stdout\"}"}],"usage":{"inputTokens":216,"outputTokens":144,"cacheReadTokens":1792,"reasoningTokens":77}},"sourceEventSeqs":[171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255,256,257,258,259,260,261,262,263,264,265,266,267,268,269,270,271,272,273,274,275,276,277,278,279],"surfaceOp":"append"}
{"type":"tool/call","seq":281,"time":1783095163935,"data":{"turn":1,"step":3,"callId":"call_00_9CQs2NzrhnwYjdvmjsR10424","name":"bash","arguments":"{\"command\": \"echo HELLO\", \"description\": \"Print HELLO to stdout\"}"}}
{"type":"hook/invoked","seq":282,"time":1783095163944,"data":{"turn":1,"point":"PostToolUse","dialect":"claude","handlerId":"claude:PostToolUse:3","matcher":"bash"}}
{"type":"hook/result","seq":283,"time":1783095163951,"data":{"turn":1,"point":"PostToolUse","handlerId":"claude:PostToolUse:3","decision":"block","exitCode":2,"stderrSummary":"tool output rejected by policy: rerun with a summary instead","durationMs":6.553152000000409}}
{"type":"hook/result","seq":283,"time":1783095163951,"data":{"turn":1,"point":"PostToolUse","handlerId":"claude:PostToolUse:3","decision":"block","exitCode":2,"stderrSummary":"tool output rejected by policy: rerun with a summary instead"}}
{"type":"tool/result","seq":284,"time":1783095163951,"data":{"turn":1,"step":3,"callId":"call_00_9CQs2NzrhnwYjdvmjsR10424","content":[{"type":"text","text":"tool output rejected by policy: rerun with a summary instead"}],"isError":true},"sourceEventSeqs":[281],"surfaceOp":"append"}
{"type":"step/end","seq":285,"time":1783095163951,"data":{"turn":1,"step":3}}
{"type":"step/start","seq":286,"time":1783095163951,"data":{"turn":1,"step":4}}