I've completed all phases. Let me summarize my findings.

**Phase 1–2 (re-anchor + explore):** fn-81.3 was a mechanical round-trip-elimination refactor of *skill markdown* (plan, deps, make-pr, tracker-sync, work, resolve-pr, prime) — no source code, no API/type/name surface. Verified the actual tracker-sync `body-merge.md` now uses `set-merge-base --flow-file ".flow/specs/${SPEC_ID}.md"` with unique temp paths for the tracker half + merge log (matches R3). Fixed-path grep across all skills is clean.

**Phase 3 (drift):** Implementation matches spec (done summary: RP review SHIP, 0 findings). No naming/API/path divergence.

**Phase 3b:** Husk short-circuit N/A (glossary 38 terms, 2 decisions, strategy populated).
- 3b.1 glossary: every entry has an empty `avoid` list → no rename signal.
- 3b.2 decisions: `factory-droid…` (module `docs/platforms.md`) — fn-81.3 didn't touch it. `tracker-sync-is-projection…` (`## Consequences` names `lastSyncedAt` merge-base, make-pr, land.merged) — fn-81.3 touched tracker-sync/make-pr but only mechanically (path reuse, refetch-gating); it never makes the tracker drive flow state. No contradiction.
- 3b.3 strategy: token-efficiency refactor adds no SaaS/deps; aligns with Ralph/Cross-platform/Self-improving tracks. Spec's "Strategy Alignment" names only current tracks → no rename candidate.

**Phase 4:** fn-81.4 is a pure validation/staging task. Its references — the spec-canonical R13 `/tmp/*` grep list (now clean), CHANGELOG house style, optimization-log format, sync-codex/smoke/pytest — carry no fn-81.3-specific name/path that drifted. No stale references.

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

**Phase 5:** DRY_RUN=true. Traceability `## Requirement coverage` table: fn-81.3's `satisfies:[R3,R4,R5,R6,R7,R12,R13]` matches every table row listing it (R7 "rest", R13 shared). No table drift → no change.

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Drift detected: no

- fn-81.3 (round-trip eliminations across plan/deps/make-pr/tracker-sync/work/resolve-pr/prime) is a skill-markdown token-efficiency refactor; implementation matches the spec plan (RP review: SHIP, 0 findings). No API/name/path surface for downstream tasks to reference stale.

Would update (DRY RUN):
- Nothing. fn-81-skill-runtime-token-plumbing-single.4 is a validation/release-staging task whose references (spec-canonical R13 fixed-path grep list — verified clean; CHANGELOG `## Unreleased` house style; optimization-log computed-count row; sync-codex/smoke/pytest gate) contain no fn-81.3-derived identifier that drifted.

Would update traceability:
- None. `## Requirement coverage` rows already match fn-81.3's `satisfies:[R3,R4,R5,R6,R7,R12,R13]` (R7 = "rest", R13 shared across .1/.2/.3/.4).

Decision overrides flagged for review:
- None. Neither active decision (`factory-droid-platform-status`, `tracker-sync-is-projection`) is contradicted by fn-81.3's mechanical changes.

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