merge-gate

Reviews a change before merge and returns an evidence-backed verdict. Use when asked to review a diff, check whether work is done, decide if a branch is merge-ready, or verify a change before merging. Runs a scope pass, a proof pass, three attack lenses (side effects, security, blast radius), and a computed verdict. Never claims MERGE-READY without executed proof, and never executes without a sandbox or tree-bound approval.