Opt-in `pnpm smoke:pipeline` lane replaying 19 declared scenarios across
builtin:coding-ideas and the builtin:coding non-regression floor, driving the
real engine: disposable local Git repositories, throwaway PostgreSQL store,
production graph dispatch, ProjectEngine merge admission, real worktree
acquisition, and deterministic mock-provider scripts under testMode.
Each scenario declares one closed terminal state (merged-done, inert-intake,
parked, manual-hold, no-op-merge); an undeclared terminal fails the run, and
five wedge detectors (W1-W5) reject contradictory parks, finalization loops,
severed sessions, unreachable waits, and quiescence without progress.
Differential proof: on the pre-FN-180 tree (95ea06b48) exactly S05, S06, S09,
S10 and S16 fail across both workflows with behavioral assertions, and pass
after FN-180 — the FN-175/FN-177 incident classes are reproduced mechanically.
The declared duration budget is re-baselined 70s -> 90s at landing. The harness
did not degrade: the identical branch measured 61.8-64.1s against the
pre-integration main and 73.2-80.2s against the same main after 65 upstream
commits, with growth in transform, import and test phases the lane does not own.
docs/testing.md records the measurements, the cause, and the file-consolidation
lever to reach for before the budget is touched again.
Excluded from engine-default and engine-core; the merge gate is unchanged and
CI runs the lane non-blocking after merge.
Fusion-Task-Id: FN-182
bde81ad4ff