How to prove a fix works
A capture with 3 on the scoreboard confirms exactly one thing: at that moment it showed 3. On a bonus game where three matches gave 30 points, we sort out what the command output, the log, the diff and the screenshot each prove, and build a six-field EVIDENCE_LOG with honest "was not checked" notes.
How to check what AI tells you about someone else's project
A file reference with line numbers doesn't prove the agent's claim yet. We read a short history.js from Haiku 50 and find that the history is written to localStorage but never read back, and that the 100 limit only trims the screen. The result is a short HANDOFF_REVIEW.md report on what's confirmed and what isn't.