Verified project sync handlers for repos and tags JSON arrays. **Investigation:** - Reviewed client/schema.py (lines 91-92): repos and tags are TEXT fields storing JSON arrays - Reviewed client/store.py (lines 657-658, 754, 758): Properly uses json.dumps() for repos and tags - Reviewed client/sync.py (lines 598, 600, 792, 794): Properly uses json.dumps() for repos and tags in both _update_from_server() and _insert_from_server() - Reviewed server/models.py (lines 114, 116, 139, 141): API models correctly define repos and tags as list[str] **Test Results:** Created comprehensive test suite (test_project_sync_arrays.py) with 6 tests: - test_project_repos_array_sync: ✓ PASSED - test_project_tags_array_sync: ✓ PASSED - test_project_repos_and_tags_sync: ✓ PASSED - test_project_empty_arrays_sync: ✓ PASSED - test_project_update_repos_sync: ✓ PASSED - test_project_update_tags_sync: ✓ PASSED All 50 sync-related tests passed (pytest tests/test_sync*.py tests/test_project_sync_arrays.py). **Conclusion:** Project sync handlers are correctly implemented. Both repos and tags JSON arrays are properly serialized with json.dumps() when writing to SQLite and properly deserialized when reading. No bugs found - verification passed.