shard(tick): 2026-05-16T07:58Z — B-0272 closed (10th pure-drift; 50% audit milestone)

docs/hygiene-history/ticks/2026/05/16/0758Z.md

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+# Tick 2026-05-16T07:58Z — Otto-CLI
+
+Thirtieth tick of the resume-session series. Rate healthy
+(4888/5000). Closed B-0272 (Atari ROM canonicalizer) as **pure
+drift** — 10th class-#1 close of the session.
+
+## Refresh result
+
+| Surface | State |
+|---|---|
+| Cron sentinel | Alive (`bd1c7739`) |
+| Rate limit (GraphQL) | 4888/5000 at tick-open; ~4800 after audit + close |
+| `origin/main` | At `b707acc` (PR #3814 merged last tick) |
+| PR #3816 (last tick shard) | OPEN (assumed wait-ci; not polled) |
+
+## Audit: B-0272 — PURE DRIFT (class #1)
+
+Picked B-0272 (`Atari 2600 ROM canonical naming via TOSEC/No-Intro hash lookup`). Single primary artifact: `tools/roms/canonicalize.ts`.
+
+**Per-acceptance grep** (zero gh):
+
+| Acceptance | Verified |
+|---|---|
+| Script at `tools/roms/canonicalize.ts` | ✓ exists (8953 bytes) |
+| Renames ROMs to TOSEC canonical names | ✓ — `renameSync` import + match-and-rename loop |
+| Reports unmatched hashes | ✓ — schema includes `matched: bool` field |
+
+Provenance: PRs [#2166](https://github.com/Lucent-Financial-Group/Zeta/pull/2166), [#2168](https://github.com/Lucent-Financial-Group/Zeta/pull/2168), [#2172](https://github.com/Lucent-Financial-Group/Zeta/pull/2172) — all merged 2026-05-09. 7-day drift gap.
+
+**Closed via [PR #3820](https://github.com/Lucent-Financial-Group/Zeta/pull/3820)** + Resolution section mapping 3/3 acceptance items.
+
+## Drift-audit progress tally
+
+| Class | Count | Latest |
+|---|---|---|
+| 1 (Pure drift, closed) | **10** | **B-0272 (this tick)** |
+| 2 (Partial, Status-annotated) | 4 | — |
+| 3 (Multi-slice, verified-self-documenting) | 1 | B-0440 |
+| 4 (Multi-slice, all children closed, closed) | 1 | B-0159 |
+| FP-2 (shared-tool + API-absent) | 2 | B-0509 |
+| FP-3 (shared-tool + content-work-not-done) | 1 | B-0346 |
+| **Total triaged** | **19 of ~38** | |
+
+**50% milestone**: 19 candidates triaged, ~19 remaining. Half-way
+through the audit-backlog from one cascade window.
+
+## Pattern observation: pure-drift rate stabilizing
+
+Across 19 triaged candidates:
+
+- **10 pure-drift (53%)** — work shipped, status flag never flipped
+- **6 partial/multi-slice (32%)** — needs annotation OR self-documenting (Class 2 + 3 + 4 = 4 + 1 + 1)
+- **3 FP (16%)** — audit tool's noise floor
+
+The ~53% pure-drift rate is consistent across the cascade. The
+audit tool's signal is meaningful even with ~16% FP rate.
+
+## Sentinel + close
+
+`CronList`: `bd1c7739` alive.
+
+## Visibility signal
+
+- B-0272 closed via PR #3820 (10th pure-drift; 50%-of-audit-backlog milestone)
+- Pure-drift rate stabilizing at ~53% across the audit set
+- Sentinel `bd1c7739` alive
+- Rate ~4800/5000 (normal tier)
+- ~19 audit candidates remaining