In a production AI agent pipeline, the difference between job done and job half-done is often invisible — not because the output is wrong, but because the process was incomplete. The agent skipped a mandatory step, self-certified that everything was fine, and delivered a result that looks complete. The user never knew. The system never caught it. The step was never executed. The Visible Checklist Pattern emerged from an empirical observation: an AI agent practitioner noticed that wh...