chore: import upstream snapshot with attribution

tools/tests/__init__.py

@@ -0,0 +1,28 @@
+"""Characterization tests for unity-mcp build and release infrastructure.
+
+This package contains pytest-based characterization tests that document
+the CURRENT behavior of build, release, and testing tools without refactoring.
+
+Test Structure:
+- test_build_release_characterization.py: Main characterization suite
+
+Domains Covered:
+1. Version Management (update_versions.py)
+2. MCPB Bundle Generation (generate_mcpb.py)
+3. Asset Store Preparation (prepare_unity_asset_store_release.py)
+4. Stress Testing (stress_mcp.py, stress_editor_state.py)
+5. Release Workflows and Checklists
+6. Git Integration Patterns
+
+Test Style:
+- Characterization tests (capture current behavior)
+- No refactoring performed
+- Heavy use of mocking and fixtures
+- Async tests using pytest-asyncio
+- Comprehensive docstrings explaining patterns
+
+Running Tests:
+    cd /Users/davidsarno/unity-mcp
+    python -m pytest tools/tests/ -v
+    python -m pytest tools/tests/test_build_release_characterization.py -v --tb=short
+"""