Baked now, off the weekly cadence, because check-family-gate.py refuses a family_gate template while the newest
baked golden is older than 0.287.0. Round trip sha == bake; three-field vouch; R-120 refused 0.286.1 after.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0159rPz1ZhFKsS53msqPYxtS
