Execute the handoff briefs a /drift-handoff run wrote to docs/audits/<audit-date>/<source-id>/ — apply each brief's edits, run its own verification steps, and stamp it done. Reads briefs from disk and never from the conversation, so it runs cold in a fresh session (preferred) or warm straight after /drift-audit and /drift-handoff. Walks briefs in numbered order with a checkpoint each — confirm the brief's quoted evidence still exists, apply, verify, stamp, continue — and stops on the first failure rather than pressing on. Briefs whose Kind is a decision or an investigation rather than an edit are put back to the user, never executed. Skips briefs already carrying an execu…
