# Circuit List Editor Known Limitations

- All currently supported Circuit and CircuitDeviceRow editor writes use
  persistent project commands and project-wide toolbar undo/redo, including
  moves, atomic multi-section reorders and explicit renumbering. Undo/redo
  eligibility is restored from server history after a page reload.
- A paginated revision-metadata API exists, but there is no browsable timeline
  UI yet; the editor currently exposes only the next eligible Undo/Redo
  actions.
- Named logical project snapshots and restore are not 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.