- Add .harness/check.sh: one-command quality gates (7 checks, L1-L3) L1: mvn compile L2: file existence, JSON validity, mapper structure L3: secret leak detection - Update feature_list.json: mark harness-002 done, add harness-003 - Update PROGRESS.md with Session 002 record - All 7 gates passed: ✅✅✅✅✅✅✅