- test/shard-engine.test.ts: failing/unhandled/module-load output fails both
lanes, per-lane zero-execution and seed rules, whole-group kill on a wall
timeout (both lanes), mocked-win32 path with no negative-pid kill,
companion settle order, log capture, sandbox isolation, flag loop.
- test/shard-engine-equivalence.test.ts + test/fixtures/shard-equivalence:
seven outcome fixtures plus one real shard, run through both lanes and
compared with classifications recorded from the base runners (96764e80).
- test/shard-cli-parity.test.ts + test/fixtures/shard-cli-parity: flag set,
defaults, validation errors and the Unknown argument error per lane match
the base runners.
