# 17. Edit Mode Foundation (Phase 2 Start)

**Date:** 2025-11-24  
**Version:** 0.2.0  
**Tasks:** TASK-011-1

## 🚀 Key Changes

### Phase 2: Mesh Editing Initiated
We have started Phase 2 of the roadmap, focusing on low-level mesh manipulation. This release introduces the infrastructure for **Edit Mode** operations.

### New Tools (Edit Mode)
These tools operate on the geometry (vertices, edges, faces) of the selected mesh.
- `mesh_select_all(deselect: bool)`: Select or deselect all geometry elements.
- `mesh_delete_selected(type: str)`: Delete selected elements ('VERT', 'EDGE', 'FACE').
- `mesh_select_by_index(indices, type, deselect)`: Precise selection of geometry elements by their index. This allows the AI to target specific vertices for manipulation.

### Technical Architecture
- **Mode Switching**: The new `MeshHandler` automatically ensures the object is in `EDIT_MODE` before performing operations.
- **BMesh Integration**: Implemented usage of Blender's `bmesh` module for advanced geometry access (indexing, topology navigation).
- **Tests**: Added `tests/test_mesh_foundation.py` verifying mode switching and BMesh mocking.
