I have everything needed. Let me work through the remaining phases.

**Phase 2–3 (drift analysis):** fn-81.3's done summary and `satisfies: [R3,R4,R5,R6,R7,R12,R13]` match the spec's plan exactly. The work is mechanical round-trip/re-emission elimination in skill **markdown** — it invents no new variable/function/API names, data structures, or signatures that a downstream task could reference. The one scope note ("R13 extended to `flow-next/SKILL.md`") is squarely within R13's "unique temp paths" intent, not a divergence.

**Phase 3b:**
- **3b.1 glossary** — 38 terms, but every entry has `avoid: []`. No aliases exist → no rename possible.
- **3b.2 decisions** — 2 active entries. *factory-droid* names `platforms.md` + cross-platform scaffolding (env-var/plugin-root/hook-matcher) — fn-81.3 touched none of that. *tracker-sync-is-projection* — fn-81.3 DID touch `tracker-sync/references/body-merge.md`, but the change (`set-merge-base --flow-file <spec file>` instead of re-emitting `/tmp/merged-flow.md`) is pure token-plumbing; it preserves the merge-base snapshot mechanism and, if anything, reinforces "the spec is the source of truth." No contradiction of either decision's direction → nothing to flag.
- **3b.3 strategy** — fn-81.3 aligns with the *Ralph autonomous mode*, *Cross-platform parity*, and *Self-improving through normal work* tracks (as the spec's own Strategy Alignment states). No SaaS/hosted/external-dep contradiction. Parent-spec Strategy Alignment names only tracks present in current `tracks` → no track rename.

**Phase 4 (downstream fn-81.4):** fn-81.4 is a release-gate task (mirror regen, smoke+pytest, cross-task greps, CHANGELOG `## Unreleased`, optimization-log row). It references no name/API/data-structure from fn-81.3 that could go stale. Its fixed-path grep list already includes `/tmp/desc.md` and `/tmp/merged-flow.md` — the exact paths fn-81.3 cleaned — and its "mirror committed in this task only" instruction matches fn-81.3's "mirror regen deferred to fn-81.4." Fully consistent.

**Phase 4b:** CROSS_SPEC=false → skipped.

**Phase 5:** No drift → nothing to update. Parent spec's `## Requirement coverage` table already matches fn-81.3's `satisfies` set and fn-81.4's coverage — no row change. DRY_RUN=true regardless.

---

Drift detected: no

fn-81.3 implemented exactly what the spec planned (satisfies [R3,R4,R5,R6,R7,R12,R13]): mechanical round-trip/re-emission eliminations in skill markdown (plan, deps, make-pr §4.6b, tracker-sync merge-base, config-get single-fetch sweep, prime prose, R13 unique-path cleanup). No new names, APIs, signatures, or data structures were introduced that downstream references.

Would update (DRY RUN):
- Nothing. Downstream task fn-81.4 references no stale name/API/path from fn-81.3. Its verification grep list already covers the paths fn-81.3 cleaned (`/tmp/desc.md`, `/tmp/merged-flow.md`), and its "mirror committed here only" instruction matches fn-81.3 deferring mirror regen to fn-81.4.

Would update traceability:
- Nothing. The parent spec's `## Requirement coverage` table already reflects fn-81.3's coverage (R3/R4/R5/R6/R7/R12/R13) and fn-81.4's (R13/R14/R15). No rows affected by drift.

Glossary renames: none — all 38 glossary entries have empty `avoid` lists, so no aliases exist to replace.

Decision overrides flagged for review: none — neither active decision (factory-droid platform status; tracker-sync-is-projection) is contradicted. fn-81.3 didn't touch the factory-droid scaffolding, and its tracker-sync merge-base change is token-plumbing that preserves projection-not-coordination.

Strategy drift flagged for review: none — fn-81.3 aligns with the served tracks (Ralph autonomous mode, Cross-platform parity, Self-improving through normal work); no SaaS/hosted/external-dep contradiction and no track rename.

No files modified (DRY_RUN=true).