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fix(acr): pin Bash >> append discipline on shared implementation log (M-BUG-20)

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implement.md spawns implementer agents in parallel batches, all appending to
the same implementation-log.md. Dogfooding showed agents satisfying 'Append
result to:' with a full-file Write — the last writer clobbered 4 of 6 entries.
Pin the mechanism in both contracts: append with Bash >> heredoc, never the
Write/Edit tool on the shared log. Shape tests pin the instruction in both
files (empirically verified: agents given the >> instruction appended safely).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Kjell Tore Guttormsen 2026-07-17 03:53:06 +02:00
commit b4d819b72d
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commands/implement.md
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@ -78,6 +78,8 @@ Agent(subagent_type: "config-audit:implementer-agent")
fields from the action plan (the planner already rendered them) —
do not re-derive severity prose. Append result to:
~/.claude/config-audit/sessions/{session-id}/implementation-log.md
Append with Bash `>>` (heredoc) — NEVER the Write tool on this log;
parallel agents share it and a full-file Write clobbers their entries.
```
Show progress between groups using the humanized titles already present in the action plan: