phased-build-loop

Execute a multi-phase plan one phase at a time under a gated review loop, so the user never has to take the assistant's word that work was done correctly. Use when delivering any ordered build/change plan (e.g. a repositioning or refactor broken into phases), or when the user asks for "design review", "checks and loops", "assurances", "verify you actually did it", or "do it phase by phase with sign-off". Each phase…