Diff review Spec §20.3 / §21.3.2: a code-migration / tune-collab handoff is worthless without a human-reviewable diff. This atom is the "present the patch, capture the decision" stage. Inputs - The project cwd's accumulated edits since the run started (or since the previous diff-review iteration). - for context per file. Output The atom raises a GenUI surface with the three top-level decisions ( / / ). On the user flips per-file decisions through follow-up surfaces. Convergence The atom completes when has a non-empty . Acceptance writes (or when a successful build-test is on file) into the ev…