# Circuit List Editor Known Limitations

- Undo/redo history is session-local only.
- Undo/redo history is not persisted across reloads or between users.
- No project revision or logical snapshot model is implemented yet.
- No Revit/CSV/IFCGUID import and export workflow is implemented yet.
- Persistence currently targets local SQLite; PostgreSQL is an architectural option, not an implemented runtime.
- The global device library supports basic CRUD and copy operations, but has no
  versioning, permissions or controlled synchronization model.
- Final electrical sizing logic is not implemented yet.
- No full norm-compliant voltage-drop and protection-dimensioning calculation flow yet.
- Sorting is view-only until users explicitly apply sorted order.
- Cross-section circuit drag-reorder is intentionally blocked.
- Legacy consumer UI and server endpoints are removed; retained source rows and migration mappings remain available only for upgrade traceability.