What problem does it solve? It prevents scope creep and uncontrolled edits during delegated implementation by forcing the executor to work only from a fully settled brief with exact authorized paths, verified facts, and a fixed proof contract. ## Core Features & Use Cases - Brief validation: Blocks execution before reading source if the brief is missing GOAL, AUTHORIZED PATHS, KNOWN FACTS, CHANGE, PROOF CONTRACT, or ESCALATE IF fields. - Bounded execution: Reads only authorized paths, makes the smallest single atomic change, and runs only the exact focused commands named in the proof contract. - Structured reporting: Returns a fixed RESULT/EDITS/REGRESSION/CHECKS/SCOPE AUDIT report with escalation instead of improvisation when facts are wrong or scope grows. - Use Case: A coordinator agent decomposes a plan into small stages and hands one settled stage to this executor, which implements exactly that change, proves it with the named commands, and stops. ## Quick Start Ask the agent to implement this quick brief, providing the GOAL, AUTHORIZED PATHS, KNOWN FACTS, CHANGE, PROOF CONTRACT, and ESCALATE IF fields for one atomic change.