Trapdoor Chalk Mark Afteruse Receipt Mechanic

A trapdoor chalk row is a narrow safety notice, not universal consent. When a future reader asks to spend it, the review must surface the source mark, panel, rehearsal context, cited safety scope, harmed performer or explicit absence, proof bridge, selected posture, future effect, and counter deltas.

The mechanic supports certification, reader restriction, trapdoor proof attachment, claimant reopening, consent/safety split, quarantine, and false-clean default branches. Each branch changes route state and counters so replay/Jest evidence can distinguish the chosen posture.