Add [tool.black] config to pyproject.toml and Black hook to .pre-commit-config.yaml (rev 26.3.1), then auto-format all Python source and test files with line-length=100, target-version=py310. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Apply Black formatting to wire_connectivity.py, kicad_interface.py, and tool_schemas.py (changed files only) - Add python/tests/conftest.py with pcbnew/skip C-extension stubs - Add python/tests/test_wire_connectivity.py with 29 unit tests covering schema validation, handler dispatch, parameter validation, and core logic (_to_iu, _parse_wires, _build_adjacency, _find_connected_wires, get_wire_connections) Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
