drift-trio-fuzz.spec.ts: mulberry32-seeded weighted concurrent actions on A+B
(C observes), K=40, marker-synced oracle sweep every 10 steps, per-tab console
capture, and a replayable failure artifact (seed + action log + drift/saves/
renders/consoles) dumped to logs/kicad/drift-trio-fuzz/. DRIFT_FUZZ_SEED
replays a sequence exactly.
First catch (0008 §10 #10, OPEN): the actively-editing receiver's C++ apply
silently drops ops under sustained bidirectional load — JS dispatched every
apply, the editor never applied some; pure observer and emitter stay clean;
one run hit a wasm 'memory access out of bounds' on the observer. Timing-
dependent, so the fuzz tests are test.fixme'd (an expected-fail would flake
CI) and run manually via DRIFT_FUZZ_SEED until the fix lands (phase E).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01G5cAM9M6q34n5X4dbrfVvi
