Files
fusion/scripts/lib/lifecycle-column-census-baseline.json
gsxdsm 3577cb6adf fleet: project-engine.ts 12 → 5 — auto-merge silently declined every card on a renamed board (#2706)
**Claim announced before the work** (on #2689, alongside
`register-task-workflow-routes.ts`):
`packages/engine/src/project-engine.ts`.

**12 → 5.** Repo backlog → **685**.

## The failure mode here has no error signature

Every merge guard in this file spelled the lane `in-review`. On a
renamed board nothing throws, nothing logs a warning — **auto-merge
simply declines every card**:

| guard | what a renamed board gets |
|---|---|
| `requestInterpreterMerge` | returns `noOp: true` — *"parked cleanly in
review, awaiting human merge"* — for a card that was in review and fully
eligible |
| the merge-queue snapshot | returns an **empty list** for a queue full
of review cards, so the coordinator sees nothing to admit |
| the `taskMoved` auto-merge handoff | never fires, so nothing reaches
auto-merge in the first place |
| the pause-interruption tracker | drops every card from its
paused-review set on the next update, so a merge paused mid-flight is
never interrupted |

The operator sees cards resting in review with auto-merge **on**, and
every log line says the system did the right thing. There is no string
to search for — which is the argument for the census being a parse
rather than a grep over error messages.

## Implementation notes

- **Core's `resolveTaskLifecycleColumns` directly** — the canonical
helper, so no new abstraction and no fourth local resolver in a file
that had none.
- **The merge-queue snapshot resolves per task through a shared
`irCache`**, because a merge queue can hold cards from *different*
workflows. Per-workflow, not per-card: one IR read each.
- **The handoff and its post-grace recheck share one snapshot.** They
are halves of one decision — "did this card just enter the merge lane,
and is it still there?" — and that is exactly the split that produced
the defects in `executor.ts`.

## Revert proof

**1 of 3 cases reddens** with the literal restored.

The suite invokes the real `requestInterpreterMerge` via `.call()` on a
minimal `this` (`runtime.getTaskStore`, `allowInReviewMergeProcessing`,
`onMerge`) instead of standing up a whole `ProjectEngine` runtime. The
body under test is the shipped one, and *reaching* `onMerge` is the
assertion. I would rather explain that seam than either skip the proof
or spend the test budget booting a runtime. The default-board case is
labelled in the file as no-change evidence, not counted as coverage.

## The remaining 5, flagged not guessed

All five are `column === "done"` **merge-confirmation reads** — "did the
merge land?". That is a different question from any lane role, and it
shares its answer with the dependency guards I flagged in `executor.ts`
(`12325`) and `register-task-workflow-routes.ts` (`3995`). Three files,
one open question: **what does "landed / satisfied" mean on a board
whose terminal column is not named `done`, and is it the complete column
or the terminal union?** Deciding it once and applying it to all three
is right; swapping it three times independently is how the resolver
choice ends up inconsistent — which already happened once inside
`executor.ts`, where the correct resolver inverts between two guards a
few lines apart.

## Verification

`pnpm test:gate` **158 / 10 / 487 / 71** · **56/56** across the six
auto-merge / project-engine suites · 3/3 in the new suite · `tsc -p
packages/engine` clean · `pnpm lint` clean · census `--strict` exit 0.

No changeset: `@fusion/engine` is private, and the behaviour change is
confined to renamed boards.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-07-30 04:25:19 -07:00

214 lines
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JSON

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