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CHANGELOG_2025-11-30.md

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-# Changelog - 2025-11-30
-
-## IPC Backend Implementation - Real-time UI Synchronization
-
-This release implements the **KiCAD IPC API backend**, enabling real-time UI synchronization between the MCP server and KiCAD. Changes made through MCP tools now appear **instantly** in the KiCAD UI without requiring manual reload.
-
-### Major Features
-
-#### Real-time UI Sync via IPC API
-- **Instant updates**: Tracks, vias, components, and text appear immediately in KiCAD
-- **No reload required**: Eliminates the manual File > Reload workflow
-- **Transaction support**: Operations can be grouped for single undo/redo steps
-- **Auto-detection**: Server automatically uses IPC when KiCAD is running with IPC enabled
-
-#### Automatic Backend Selection
-- IPC backend is now the **default** when available
-- Transparent fallback to SWIG when IPC unavailable
-- Environment variable `KICAD_BACKEND` for explicit control:
-  - `auto` (default): Try IPC first, fall back to SWIG
-  - `ipc`: Force IPC only
-  - `swig`: Force SWIG only (deprecated)
-
-#### Commands with IPC Support
-The following commands now automatically use IPC for real-time updates:
-
-| Command | Description |
-|---------|-------------|
-| `route_trace` | Add traces with instant UI update |
-| `add_via` | Add vias with instant UI update |
-| `add_text` / `add_board_text` | Add text with instant UI update |
-| `set_board_size` | Set board size with instant outline update |
-| `get_board_info` | Read live board data |
-| `place_component` | Place components with instant UI update |
-| `move_component` | Move components with instant UI update |
-| `delete_component` | Delete components with instant UI update |
-| `get_component_list` | Read live component list |
-| `save_project` | Save via IPC |
-
-### New Files
-
-- `python/kicad_api/ipc_backend.py` - Complete IPC backend implementation (~870 lines)
-- `python/test_ipc_backend.py` - Test script for IPC functionality
-- `docs/IPC_BACKEND_STATUS.md` - Implementation status documentation
-
-### Modified Files
-
-- `python/kicad_interface.py` - Added IPC integration and automatic command routing
-- `python/kicad_api/base.py` - Added routing and transaction methods to base class
-- `python/kicad_api/factory.py` - Fixed kipy module detection
-- `docs/ROADMAP.md` - Updated Week 3 status to complete
-
-### Dependencies
-
-- Added `kicad-python>=0.5.0` - Official KiCAD IPC API Python library
-
-### Requirements
-
-To use real-time mode:
-1. KiCAD 9.0+ must be running
-2. Enable IPC API: `Preferences > Plugins > Enable IPC API Server`
-3. Have a board open in PCB editor
-
-### Deprecation Notice
-
-The **SWIG backend is now deprecated**:
-- Will continue to work as fallback
-- No new features will be added to SWIG path
-- Will be removed when KiCAD 10.0 drops SWIG support
-
-### Testing
-
-Run the IPC test script:
-```bash
-./venv/bin/python python/test_ipc_backend.py
-```
-
-Or test individual commands:
-```bash
-echo '{"command": "get_backend_info", "params": {}}' | \
-  PYTHONPATH=python ./venv/bin/python python/kicad_interface.py
-```
-
-### Breaking Changes
-
-None. All existing commands continue to work. IPC is used transparently when available.
-
----
-
-**Version:** 2.1.0-alpha
-**Date:** 2025-11-30