shard(tick): 2026-05-16T07:36Z — B-0346 = 3rd FP variant; taxonomy now 6 patterns

docs/hygiene-history/ticks/2026/05/16/0736Z.md

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+# Tick 2026-05-16T07:36Z — Otto-CLI
+
+Twenty-eighth tick of the resume-session series. Rate at
+**1024/5000** (cost-aware boundary; treat as extreme cost-aware).
+Pure-git audit on B-0346 — discovered **3rd FP variant** (tool
+shipped for OTHER row + B-0346's content-writing work hasn't
+started). NOT drift; leave open.
+
+## Refresh result
+
+| Surface | State |
+|---|---|
+| Cron sentinel | Alive (`bd1c7739`) |
+| Rate limit (GraphQL) | **1024/5000** (cost-aware boundary) |
+| `origin/main` | Advanced — peer's PR #3809 (B-0557 slice 4 mixed-bullet) merged |
+
+## Audit: B-0346 — 3rd FP variant
+
+[B-0346](../../../../../backlog/P1/B-0346-backport-spec-gaps-to-openspec-b0193.md)
+(`Back-port spec gaps to OpenSpec`). Path flagged: `tools/openspec/inventory.ts`.
+
+**Per-acceptance check** (zero gh):
+
+- Tool `tools/openspec/inventory.ts` exists (8428 bytes, 300 lines)
+- Tool's git log: `tool(B-0171): add openspec/inventory.ts — Phase 1 spec-to-code gap report (#2147)` — shipped for **B-0171**, NOT B-0346
+- B-0346 acceptance items are about USING the tool to author specs:
+  1. Each gap from B-0345 has disposition (spec-written / augmented / etc.)
+  2. New/augmented specs pass `inventory.ts` with improved coverage
+  3. Gap count delta documented
+
+This is a **3rd FP variant**: tool shipped for prior row + B-0346
+requires additional content-writing work USING the tool. The
+artifact's mere existence doesn't satisfy B-0346.
+
+**Distinction from 2nd FP class (B-0418, B-0509):**
+
+| Class | Pattern |
+|---|---|
+| **2nd FP** (B-0418, B-0509) | Tool path exists for OTHER row; acceptance-named API/field absent from tool |
+| **3rd FP variant** (B-0346) | Tool path exists for OTHER row; acceptance requires USING the tool to produce new content; tool may already have everything needed but the USING-work hasn't happened |
+
+Both subclasses share the same disposition: NOT drift; leave open;
+the audit tool can't tell the difference but per-acceptance
+verification catches both.
+
+## Updated taxonomy
+
+| Class | Count | Examples |
+|---|---|---|
+| 1 (Pure drift, closed) | 9 | — |
+| 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-path + acceptance-API-absent) | 2 | B-0418, B-0509 |
+| FP-3 (shared-tool-path + content-writing-work-not-done) | **1** | **B-0346 (this tick)** |
+| **Triaged** | **18 of ~38** | |
+
+## Sentinel + close
+
+`CronList`: `bd1c7739` alive.
+
+## Visibility signal
+
+- B-0346 verified as 3rd FP variant (no edit)
+- New FP-3 sub-class documented; taxonomy now spans 6 patterns
+- Rate at 1024/5000; cost-aware boundary
+- Sentinel `bd1c7739` alive
+- ~20 audit candidates remaining