Takes a loose request and restructures it into five sections: Ask, Goal, Examples, Negations, Tools. Negations is the section that earns its place. Most agent runs go wrong because nobody wrote down what the agent must not do, so it wanders and the run is wasted.
Fires on /agent-goal, on “craft me a /goal prompt”, or any time a big task is about to be delegated.
It produces the brief. It does not dispatch the agent and it does not review what comes back.