Turn every important claim into a receipt

Models are good at moving from evidence to prose. They are also good at producing prose that looks like it came from evidence. The receipt requirement separates those two behaviors.

The receipt can be a citation, a row count, a command output line, a test name, or a declared assumption. The format matters less than the discipline: every claim has to point somewhere.

When the model cannot produce a receipt, that is not failure. That is the system doing its job and showing you where judgment is still needed.