When AI Says “I’m Done” — Claude Code Verification Harness: TDD · Zero Regressions · QA Gate

Do you take AI’s “I’m done” at face value? Starting with a scenario where all 28 tests are green but the completion report is false, this builds a QA gate combining a baseline, regression comparisons, test tampering detection, report cross-checks, and hidden tests—and uses a stop hook to prevent Claude Code from finishing until it passes the gate.