Self-Refine: let the model critique its own draft, then rewrite

Ask a model for something once and you get exactly one pass: a first draft. It emits tokens left to right, never looking back, so what comes out is fluent, plausible, and almost always improvable. A function that forgets the empty-input case. A paragraph padded with "really great". An email with no deadline. The frustrating part is the model usually knows better — ask it to check and it spots the flaw instantly — but in a single forward pass there's no moment where it stops to look. Humans…