# Changelog 89: TASK-044 Extraction Analysis Tools

**Date:** 2025-12-04
**Task:** TASK-044
**Category:** New Feature (Extraction Tools)

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## Summary

Implemented 6 specialized extraction analysis tools for the Automatic Workflow Extraction System (TASK-042). These tools enable deep topology analysis, component detection, symmetry detection, and multi-angle rendering for LLM Vision integration.

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## New MCP Area: `extraction`

Created a new tool area dedicated to workflow extraction analysis.

### Tools Implemented

| Tool | Description |
|------|-------------|
| `extraction_deep_topology` | Deep topology analysis with feature detection (bevels, insets, extrusions) |
| `extraction_component_separate` | Separates mesh into loose parts for individual analysis |
| `extraction_detect_symmetry` | Detects X/Y/Z symmetry planes using KDTree with confidence scores |
| `extraction_edge_loop_analysis` | Analyzes edge loops, parallel groups, chamfer detection |
| `extraction_face_group_analysis` | Analyzes face groups by normal, height levels, inset/extrusion detection |
| `extraction_render_angles` | Multi-angle renders (front, back, left, right, top, iso) for LLM Vision |

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## Files Created

### Server Side
- `server/domain/tools/extraction.py` - IExtractionTool interface
- `server/application/tool_handlers/extraction_handler.py` - RPC bridge
- `server/adapters/mcp/areas/extraction.py` - MCP tool definitions

### Blender Addon
- `blender_addon/application/handlers/extraction.py` - bmesh analysis implementation

### Router Metadata
- `server/router/infrastructure/tools_metadata/extraction/extraction_deep_topology.json`
- `server/router/infrastructure/tools_metadata/extraction/extraction_component_separate.json`
- `server/router/infrastructure/tools_metadata/extraction/extraction_detect_symmetry.json`
- `server/router/infrastructure/tools_metadata/extraction/extraction_edge_loop_analysis.json`
- `server/router/infrastructure/tools_metadata/extraction/extraction_face_group_analysis.json`
- `server/router/infrastructure/tools_metadata/extraction/extraction_render_angles.json`

### Tests
- `tests/unit/tools/extraction/` - 27 unit tests (6 test files)
- `tests/e2e/tools/extraction/` - 22 E2E tests (7 test files including pipeline test)

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## Files Modified

- `server/infrastructure/di.py` - Added extraction handler provider
- `server/adapters/mcp/areas/__init__.py` - Added extraction import
- `blender_addon/__init__.py` - Registered extraction RPC handlers
- `tests/unit/conftest.py` - Added mathutils.kdtree and Euler mocks

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## Technical Highlights

### bmesh Analysis
- Deep topology analysis using bmesh for vertex/edge/face introspection
- Base primitive detection (CUBE, PLANE, CYLINDER, SPHERE, CUSTOM) with confidence scores
- Feature detection: beveled edges, inset faces, extrusions

### KDTree Symmetry Detection
- Uses `mathutils.kdtree` for O(log n) vertex matching
- Reports symmetry confidence per axis (X, Y, Z)
- Configurable tolerance for matching precision

### Multi-Angle Rendering
- 6 predefined camera angles for comprehensive object visualization
- Configurable resolution and output directory
- Designed for LLM Vision semantic analysis

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## Test Results

- **Unit Tests:** 27 passed
- **E2E Tests:** 15 passed, 7 skipped (skipped tests require running Blender instance)

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## Related Tasks

- **TASK-042:** Automatic Workflow Extraction System (Phase 1 tools now complete)
- **TASK-043:** Scene Utility Tools (dependency)
