# 118 - 2025-12-19: Modifier & constraint introspection

**Status**: ✅ Completed  
**Type**: Feature / Tools / Introspection  
**Task**: TASK-072

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## Summary

Added modifier and constraint introspection tools for full property dumps, geometry nodes metadata, and optional bone constraints.

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## Changes

- Added addon RPC handlers for full modifier properties and object/bone constraints.
- Added MCP tool wrappers, server handlers, and dispatcher mappings for new tools.
- Extended `scene_inspect` with `constraints` and `modifier_data` actions.
- Added router tool metadata JSON files for the new introspection tools and updated `scene_inspect` schema.
- Added unit tests for modifier data and constraints.
- Updated docs (tools summary, mega tools architecture, MCP server, addon, and task status).

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## Files Modified (high level)

- Addon:
  - `blender_addon/application/handlers/modeling.py`
  - `blender_addon/application/handlers/scene.py`
  - `blender_addon/__init__.py`
  - `blender_addon/infrastructure/rpc_server.py`
- MCP Server:
  - `server/domain/tools/modeling.py`
  - `server/domain/tools/scene.py`
  - `server/application/tool_handlers/modeling_handler.py`
  - `server/application/tool_handlers/scene_handler.py`
  - `server/adapters/mcp/areas/modeling.py`
  - `server/adapters/mcp/areas/scene.py`
  - `server/adapters/mcp/dispatcher.py`
- Router metadata:
  - `server/router/infrastructure/tools_metadata/modeling/modeling_get_modifier_data.json`
  - `server/router/infrastructure/tools_metadata/scene/scene_get_constraints.json`
  - `server/router/infrastructure/tools_metadata/scene/scene_inspect.json`
- Tests:
  - `tests/unit/tools/modeling/test_get_modifier_data.py`
  - `tests/unit/tools/scene/test_get_constraints.py`
  - `tests/unit/tools/scene/test_scene_inspect_mega.py`
- Docs:
  - `README.md`
  - `_docs/AVAILABLE_TOOLS_SUMMARY.md`
  - `_docs/_MCP_SERVER/README.md`
  - `_docs/_ADDON/README.md`
  - `_docs/TOOLS/MEGA_TOOLS_ARCHITECTURE.md`
  - `_docs/TOOLS/MODELING_TOOLS_ARCHITECTURE.md`
  - `_docs/TOOLS/SCENE_TOOLS_ARCHITECTURE.md`
  - `_docs/_TASKS/TASK-072_Modifier_Constraint_Introspection.md`
  - `_docs/_TASKS/README.md`

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## Validation

Not run (docs + unit tests only).
