Request Reviewer — the Pre-Flight Surface

Before a prompt fires, you should be able to see exactly what is about to leave the building. request-reviewer is the augment-it stage that shows the resolved request — the prompt template with every {{token}} replaced by a real row's property value — lets you pick which model it goes to, optionally shows the literal JSON request body, and then fires it. The hard part is not the UI; it is guaranteeing the request you reviewed is byte-identical to the request that sends. That guarantee is the spec.