I have everything needed. Let me finalize my analysis across the phases.

**Phase 3 (drift):** Implementation matches the spec byte-for-byte on every name the downstream task could reference — predicate `RP_ELIGIBLE`, form `uname=="Darwin" OR command -v rp-cli`, both canonical SKILL.md files, ineligible-backend set `codex`/`copilot`/`cursor`+`none`. No variable/API/data-structure drift.

**Phase 3b:**
- **3b.1 glossary** — all 38 entries have `avoid: []`; no aliases exist to rename. Nothing to flag.
- **3b.2 decisions** — both active. *Factory Droid platform status* names `hooks.json`, the `DROID_PLUGIN_ROOT` prelude, `.factory-plugin/plugin.json`, `docs/platforms.md` — none contradicted; task .1's POSIX `uname`/`command -v` gate is consistent with cross-platform parity and touched none of those. *Tracker-sync-is-projection* concerns tracker sync — zero overlap with an rp-proposal gate. No overrides.
- **3b.3 strategy** — task adds cross-platform inline bash, no new deps, no flowctl surface, no SaaS/hosted endpoint; aligns with **Cross-platform parity** + zero-dep approach. No contradiction. Spec headers are `## Goal & Context`-style, not `### track-name` H3s → no track-rename candidate.

**Phase 4 (downstream fn-78…2):** Mechanical mirror-regen + CHANGELOG + docs task. References "the eligibility gate" generically (matches `RP_ELIGIBLE` as built) and file paths (`sync-codex.sh`, `codex/**`, `CHANGELOG.md`, `docs/platforms.md`, `docs/troubleshooting.md`) that task .1 never renamed or touched — task .1 edited only the two SKILL.md files. No stale references.

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

**Phase 5:** DRY_RUN=true and no affected tasks. Parent spec has no `## Requirement coverage` table → traceability sub-step skipped.

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Drift detected: no

- fn-78…1 implemented the spec faithfully: predicate `RP_ELIGIBLE = (uname == "Darwin") OR (command -v rp-cli)`, computed in both `flow-next-plan/SKILL.md` and `flow-next-plan-review/SKILL.md`; ineligible path presents `codex`/`copilot`/`cursor` (+`none`), `export` kept as a one-off mode. Names and API surface match the spec byte-for-byte — no downstream-referenced identifier changed.

Would update (DRY RUN):
- None. The sole downstream task, fn-78…2, is a mechanical Codex-mirror regen (`sync-codex.sh`) + `CHANGELOG.md ## Unreleased` + doc-annotation task. It references "the eligibility gate" generically and only file paths task .1 never touched (task .1 edited exactly the two canonical SKILL.md files). No stale names, APIs, or data-structure assumptions to correct.

Would update traceability:
- N/A — parent spec has no `## Requirement coverage` table.

Decision overrides flagged for review:
- None — neither active decision's `Consequences` code references were touched or contradicted by the completed task.

Strategy drift flagged for review:
- None — the cross-platform POSIX gate aligns with the **Cross-platform parity** track and the zero-dependency approach.

No files modified (DRY_RUN=true).