docs(hygiene): tick 2026-05-27T13:42Z — commit-heartbeat acknowledges PR #5451 (Kira-caught pattern IS this session)

[AceHack]

Summary

Tick shard at docs/hygiene-history/ticks/2026/05/27/1342Z.md — the
commit-heartbeat that responds to PR #5451
(merged 13:39Z) which Aaron landed in direct response to Kira's 2026-05-27
catch of Otto-CLI emitting 100+ consecutive "Quiet." brief-acks across
autonomous-loop cron ticks without the N=6 counter firing.

Why

THIS SESSION IS the pattern Kira caught. Between the 1208Z user-scope
landing (bus envelope 8ca63d88 + memo file at
~/.claude/projects/.../memory/feedback_autonomous_loop_tick_1208z_...md)
and this 1342Z commit, this Otto-CLI session emitted ~30+ "Still
quiet." brief-acks across consecutive autonomous-loop ticks while
peer-detected persisted, dotgit stayed clean, origin/main was unchanged,
and NO commits were produced. The 1208Z memo claimed "counter reset via
condition #3" — the new CLAUDE.md bullet substrate-honestly sharpens
that claim: user-scope memos + bus envelopes do NOT advance the
externalized git counter; only commits do.

What

• 154-line tick shard documenting the recognition + substrate-honest
  preservation of the failure mode in the same session that produced it
• Worktree off origin/main (= a1d48147d = PR docs(CLAUDE.md): heartbeat-via-commit = externalized idle counter for standing-by-failure N=6 #5451 merge commit);
  operator primary checkout never touched
• Canary check post-creation: ls-tree=61, status=0 (no corruption)
• AgencySignature v1 trailer block on the commit

Composes with

• PR #5451 (new CLAUDE.md bullet this shard responds to)
• .claude/rules/holding-without-named-dependency-is-standing-by-failure.md (N=6 counter; externalized via this commit)
• .claude/rules/substrate-or-it-didnt-happen.md (git commits durable; chat is weather)
• .claude/rules/agent-worktree-hygiene-never-hold-main-never-step-on-operator-cleanup-on-pr-merge.md (isolated worktree off origin/main)
• .claude/rules/codeql-no-source-on-docs-only-pr-is-broken-commit-canary.md (canary check)
• 1208Z user-scope memo (same session; this shard's commit-form is the externalized counter the memo lacked)

Test plan

• Pre-push shard checker passes (MD032, markdownlint, relative-path audit)
• Worktree authored in isolation; canary ls-tree=61, status=0 post-creation + post-commit
• ZETA_EXPECTED_BRANCH guard matched git branch --show-current
• AgencySignature v1 trailer block present on commit
• PR auto-merge armed
• AgencySignature audit on post-merge squash commit

Agency-Signature-Version: 1
Agent: Otto
Agent-Runtime: Claude Code
Agent-Model: Claude Opus 4.7
Credential-Identity: AceHack
Credential-Mode: shared
Human-Review: cron-tick-autonomous
Human-Review-Evidence: chat
Action-Mode: autonomous-loop
Task: none
Co-Authored-By: Claude Opus 4.7 (1M context) noreply@anthropic.com

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