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test(FN-5089): add commit-msg hook coverage and wiring

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Fusion-Task-Id: FN-5089
Fusion-Task-Lineage: ad7ea32a-c024-45bb-b68e-b65665b9b7c6
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Fusion (runfusion.ai)
2026-05-19 02:10:45 -07:00
committed by gsxdsm
parent 96eb610800
commit ac9c83c106
9 changed files with 180 additions and 18 deletions
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docs/architecture.md
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@@ -688,6 +688,7 @@ Guardrails: this routine does **not** retry merges, does **not** apply to mixed/
- Together, `recoverAlreadyMergedReviewTasks()`, `clearStaleBlockedBy()`, and paused-aware in-review scheduling prevent merge-deadlock loops by finalizing already-landed work, clearing stale dependency blockers, reclaiming self-owned conflicts, and avoiding paused review cards re-blocking overlap dispatch.
- Merge commit attribution is ownership-aware: a `mergeDetails.commitSha` is trusted only when reachable from `HEAD` **and** attributable to the task via `Fusion-Task-Id` trailer or task-ID-bearing subject. Reachable-but-unowned SHAs are rejected to prevent sibling done tasks from sharing misleading merge metadata.
- FN-4948 adds a task-worktree pre-commit branch-identity guard: provisioning paths (`NativeWorktreeBackend.create`, executor branch creation, and `StepSessionExecutor.createStepWorktree`) install a `pre-commit` hook plus `fusion-task-id` metadata under the worktree's git-path. Commits are refused unless HEAD matches `fusion/<task-id>` or the allowlist (`fusion/step-<n>-<slug>` by default).
- FN-5089 adds an optional task-worktree `commit-msg` hook (default enabled via `commitMsgHookEnabled`) installed by the same provisioning path; when enabled it appends the configured task attribution trailer (defaults to `Fusion-Task-Id: <task-id>`) without duplicating existing trailers. Attribution remains branch/subject resilient when the hook is disabled.
- FN-4948 extends contamination auto-recovery with an `obviously-misrouted` bucket: foreign-attributed commits are auto-dropped only when attribution resolves to another task and every changed path is inside `.changeset/fn-<foreign-id>-*.md`. Any shared/non-namespaced path stays in the unique bucket and escalates to human adjudication. The single-attempt contamination invariant is unchanged.
- `ProjectEngine` settings lifecycle handlers (`project-engine.ts`) treat `enginePaused` as a soft pause: clearing it dispatches runtime resume and, when `autoMerge` is enabled, performs an `in-review` eligibility sweep to requeue mergeable review tasks.
- `UsageLimitPauser` (`usage-limit-detector.ts`) and `withRateLimitRetry` (`rate-limit-retry.ts`)