Use on every coding task that changes code. Makes the agent prove "done" - no "tests pass", "fixed", "works" or "verified" without a command it ran after its last edit, no skipping, deleting or loosening a test to get green, no "pre-existing" without running the old code, and a Receipts block at the end of the reply. Also use when the user says "trust issues", "prove it", "receipts", "show me", or "did you actually run it".
