Use whenever a run needs BOTH backend surface work AND a frontend that visualizes that data — a full-stack build from scratch, or an integration with existing services where the frontend needs inbound surfaces. The architect's parallelism protocol: the frontend and backend agents co-design the inbound surface contract, the architect approves it, the backend IMMEDIATELY provisions the endpoint AT ITS REAL PATH serving a contract-conforming mock payload, and the frontend then builds a fully integrated interface against that LIVE endpoint while the backend replaces the mock internals underneath. Neither side waits for the other. The same protocol covers a surface that alread…
