## Implementation Complete Created `shared/conflict.py` to unify conflict detection logic across client and server. ### Files Created - `shared/conflict.py` (171 lines) - Core conflict detection utilities - `tests/test_shared_conflict.py` (360 lines) - 26 unit tests ### Files Modified - `client/store.py` - Use `BASE_VERSION_FIELD` constant instead of magic string - `client/sync.py` - Use shared `extract_base_version()` function - `server/routes/sync.py` - Use shared `detect_version_conflict()` function - `shared/__init__.py` - Export new conflict utilities ### New API ```python from shared.conflict import ( ConflictResolution, # Enum: SERVER_WINS, CLIENT_WINS, ENTITY_NOT_FOUND, etc. ConflictResult, # Pydantic model for detection results detect_version_conflict, # Check if server > client base version extract_base_version, # Extract _base_version and clean data BASE_VERSION_FIELD, # Constant: "_base_version" ) ``` ### Test Results - 26 new unit tests all pass - 98 sync-related tests all pass - 1006 tests passed overall - 5 pre-existing failures (unrelated to this change) The implementation formalizes the _base_version convention and provides clear documentation for server-wins resolution semantics.

## Feature Triage Complete **Status:** PARTIALLY IMPLEMENTED **Summary:** Conflict detection logic exists and works correctly, but is duplicated across client/store.py, client/sync.py, and server/routes/sync.py. The `_base_version` internal convention is undocumented. A shared utility module would reduce duplication and ensure consistency. **Implementation Location:** - New file: `shared/conflict.py` (~80 lines) - Modify: `client/sync.py`, `server/routes/sync.py` - Pattern: Follow `shared/models.py` (TRCKR-2336) **Complexity:** Low-Medium (refactoring with clear patterns) **Dependencies:** None required See attached triage report at `/tmp/triage-TRCKR-2348.md` for full analysis including: - Current implementation details with line numbers - Proposed ConflictDetector API design - Testing strategy - Edge cases to consider