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+---
+pr_number: 3710
+title: "docs(hygiene): land tools/hygiene/AUDIT-LIFECYCLE.md \u2014 reusable template"
+author: "AceHack"
+state: "MERGED"
+created_at: "2026-05-16T03:34:15Z"
+merged_at: "2026-05-16T03:42:15Z"
+closed_at: "2026-05-16T03:42:15Z"
+head_ref: "docs/audit-lifecycle-pattern-otto-cli-2026-05-16"
+base_ref: "main"
+archived_at: "2026-05-16T03:51:36Z"
+archive_tool: "tools/pr-preservation/archive-pr.ts"
+---
+
+# PR #3710: docs(hygiene): land tools/hygiene/AUDIT-LIFECYCLE.md — reusable template
+
+## PR description
+
+## What
+
+New doc at `tools/hygiene/AUDIT-LIFECYCLE.md` capturing the 7-step pattern shared by both repo-hygiene audits that have completed it:
+
+1. Discovery — bug class named, instance observed
+2. Narrow fix — per-instance fix, no audit yet
+3. Scanner — detect-only audit
+4. Quality iterations — false positives, edge cases, cross-platform
+5. Baseline — grandfather mechanism for immutable surfaces
+6. CI enforce gate — non-required `lint (xxx)` job
+7. Maintenance — shrink baseline; eventually delete
+
+## Worked examples in the doc
+
+- **§33 migration xrefs** audit: PR #3513 → #3552 → enforce (~4 weeks)
+- **Tick-shard relative-path** audit: PR #3676 → #3708 (~80 min single session)
+
+## Includes
+
+Step-ordering rationale, mutable-vs-immutable surface distinction for baseline strategy, pre-emptive scanner-author findings worth implementing in step 3 to shorten the quality loop.
+
+Co-Authored-By: Claude <noreply@anthropic.com>
+
+## Reviews
+
+### COMMENTED — @copilot-pull-request-reviewer (2026-05-16T03:36:25Z)
+
+## Pull request overview
+
+Adds a reusable hygiene-audit lifecycle template for turning recurring repository hygiene defects into scanner-backed CI gates.
+
+**Changes:**
+- Documents the 7-step audit pattern from discovery through maintenance.
+- Adds worked examples for §33 migration xrefs and tick-shard relative-path audits.
+- Captures guidance on baseline strategy, scanner-quality pitfalls, and schema validation.
+
+## Review threads
+
+### Thread 1: tools/hygiene/AUDIT-LIFECYCLE.md:37 (resolved)
+
+**@copilot-pull-request-reviewer** (2026-05-16T03:36:25Z):
+
+P2: This current-state tools doc introduces direct name attribution outside the repository's allowed history/roster surfaces. Replace the named reviewer/persona references with role references (for example, reviewer/factory-agent/archive-migration subject) while keeping the PR numbers as provenance.
+
+### Thread 2: tools/hygiene/AUDIT-LIFECYCLE.md:44 (resolved)
+
+**@copilot-pull-request-reviewer** (2026-05-16T03:36:25Z):
+
+This lifecycle row conflicts with the existing gate documentation: `.github/workflows/gate.yml` records the §33 scanner gate as B-0533 Slice B.3/B.4, and the tick history says PR #3555 added `--enforce` plus the CI job. PR #3552 was the cleanup-to-zero PR, so this row should separate cleanup/baseline from the later CI-enforce PR instead of saying #3552 wired the gate.