## What
Pins the **engine-downtime timing shift's wip read** in
`packages/core/src/store.ts`. Test-only — no product change. First
audited site in `core`.
`reconcileActiveTimingForEngineDowntime` (FN-7011/FN-7975) excludes
proven stopped-engine wall-clock from a card's active time. It finds the
cards to fix by querying the board's wip lane.
**Blinding that read back to `["in-progress"]` left every test that
touches the sweep green — 4 in this file plus 424 in the two engine
files that exercise it, 428 in total.**
## Why 428 tests were blind to it
The existing store double is 10 lines and contains **both** documented
anti-patterns, either one sufficient on its own:
1. **`listTasks: vi.fn(async () => tasks)` ignores its `column`
argument** — it returns the same rows whichever lane is requested. A
fake that ignores its own filter cannot see a filter bug, which is
exactly the bug this resolver exists to fix.
2. **No `listWorkflowDefinitions`** — `resolveProjectColumnsForRoles`
then returns the legacy ids and nothing else (an intentional degrade in
`project-lane-vocabulary.ts` so an unreadable workflow list cannot fail
a sweep). The resolved set and the literal set were *equal by
construction*.
The new double fixes both and changes nothing else. **The existing cases
keep the original double on purpose:** they are about heartbeat and
threshold arithmetic, not lanes, and rewriting them would put unrelated
churn in the same commit.
## Measured
| | default (control) | renamed | differential | non-wip card |
|---|---|---|---|---|
| converted | pass | pass | pass | pass |
| blinded to `["in-progress"]` | pass | **FAIL** | **FAIL** | pass |
```
converted: Test Files 1 passed (1) / Tests 8 passed (8)
blinded: Test Files 1 failed (1) / Tests 2 failed | 6 passed (8)
engine neighbours (project-engine-unpause-active-timing + self-healing): 424 tests, green and unchanged
lint clean; fnxc-future-dates: none added; census unchanged
```
Blind confirmed applied with `git diff --stat` before each run, not
inferred from the tool's exit code.
## What breaks without it
On a board whose wip lane is `building`, the sweep queries
`in-progress`, finds **no tasks**, and shifts no anchor. Every card
silently absorbs the stopped-engine wall-clock the sweep exists to
exclude. The reported active time is simply wrong and nothing fails to
signal it — the same silent-wrong-number shape as the evaluator defect
in #3224.
## Also covers the complement
A held card *outside* the wip lane is **not** shifted. Widening a lane
read is the kind of change that can quietly turn a targeted sweep into a
board-wide rewrite; a card in `todo` has no stopped-engine time to
exclude, and there is now a case saying so.
## Scope note
`packages/core` is not my package. This is an additive test file with no
product change, so collision risk is low, but I am flagging it rather
than assuming: **16 of core's 17 files with resolver call sites remain
unaudited** and I claim nothing about them. The audit method and its
failure modes are documented in #3223 if core's owner wants to continue
it.
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