Two new tools for managing hierarchical schematic connections:
- add_schematic_hierarchical_label: create sheet interface ports on
sub-sheet schematics. These are the sub-sheet side of hierarchical
connections, linking to sheet pins on the parent.
- add_sheet_pin: add pins to sheet symbol blocks on the parent
schematic. Targets the correct sheet by matching the Sheetname
property. The pinName must match a hierarchical_label in the
sub-sheet.
Both tools use text-based S-expression insertion (not sexpdata
round-trip) to preserve KiCad's native file formatting. Labels
include proper justification based on orientation: left-justify for
rightward labels (0°), right-justify for leftward labels (180°).
Wire manager additions:
- _find_insertion_point(): locates sheet_instances block or final paren
- _text_insert(): inserts formatted S-expression text at the right position
- _make_hierarchical_label_text(): generates hierarchical_label S-expression
- _make_sheet_pin_text(): generates sheet pin S-expression
- WireManager.add_hierarchical_label(): static method for label insertion
- WireManager.add_sheet_pin(): static method for pin insertion into
named sheet blocks
12 unit tests covering insertion, orientation/justification mapping,
parameter validation, multi-sheet targeting, and error handling.
get_net_connections() built its match-point set exclusively from wire
endpoints. If a net label was placed directly at a pin endpoint with no
wire segment (valid KiCad style), the function returned 0 connections
because connected_wire_points was empty.
Fix: build all_match_points as the union of connected wire endpoints and
label positions. Pin matching checks both, so label-at-pin schematics
produce correct netlists alongside traditional wired schematics.
Also handles the case where the schematic object has no wire attribute
at all — instead of returning early, we continue with label positions
as the sole match points.
Tests: tests/test_label_at_pin_net_connections.py (11 unit tests)
- label at pin, no wire → pin found
- label at pin, within/outside tolerance
- label via wire → still found (regression)
- mixed wired and direct labels on same net
- no wire attribute → still detects label-at-pin
- template symbols skipped
Black/isort/flake8/mypy verified manually (pre-commit local npm hook
fails to install on Windows due to MobaXterm path environment issue).
get_net_connections() previously required wire segments between net
labels and component pins. If a label was placed exactly at a pin
endpoint (no wire), the net was silently dropped and generate_netlist
returned 0 nets.
Fix: build all_match_points as the union of connected wire endpoints
and label positions. Pin matching now checks both, so label-at-pin
schematics (valid KiCad style) produce correct netlists alongside
traditional wired schematics.
KiCad ships Python 3.9 on macOS (both v9 and v10), and `pcbnew.so` is
compiled against that interpreter. The previous `>=3.10` floor was
unreachable on macOS and docs referenced nonexistent
`python3.11/site-packages` paths. Lower the floor and correct the docs;
no source changes needed — all 49 files in `python/` already compile
clean on 3.9.
Also add `.venv/` to `.gitignore` (dotted form used by `python -m venv`).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Two issues with run_erc on KiCad 9:
1. kicad-cli returns non-zero exit code when ERC violations exist.
The handler treated this as a command failure and returned early
with success=false, even though valid JSON output was produced.
Fix: check for output file existence instead of exit code.
2. KiCad 9 nests violations under sheets[].violations instead of
(or in addition to) the top-level violations[] array used by
KiCad 8. The handler only read the top-level array, reporting
0 violations on schematics with sub-sheets.
Fix: iterate sheets[] and collect all nested violations.
Both fixes are backward-compatible with KiCad 8.
6 unit tests added covering non-zero exit codes, KiCad 8 top-level
violations, KiCad 9 sheets[] nesting, mixed structures, zero
violations, and missing output files.
export_netlist was returning "Unknown command" because no Python handler
existed. generate_netlist was timing out (30s) due to an O(nets × components
× pins) wire-graph algorithm with a new PinLocator instantiated per net.
Both handlers now delegate to `kicad-cli sch export netlist`:
- export_netlist: new handler; writes KiCad XML / Spice / Cadstar / OrcadPCB2
to the caller-supplied outputPath. Added schematicPath parameter to the TS
tool definition (was absent, making file export impossible).
- generate_netlist: replaces the slow wire-graph with kicad-cli + XML parse;
returns the same {components, nets} JSON the TS handler already expected.
Also adds _find_kicad_cli_static() so both handlers share CLI discovery
without depending on ExportCommands (which requires a loaded pcbnew board).
Cleaned up generate_netlist schema in tool_schemas.py (removed outputPath and
format fields the handler never used), updated MCP tool descriptions and
SCHEMATIC_TOOLS_REFERENCE.md to clearly distinguish the two tools.
26 unit tests added covering parameter validation, subprocess mocking,
format mapping, XML→JSON parsing, and error/timeout propagation.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Half of all valid KiCAD schematic pin positions are on the 50-mil
(1.27mm) grid but not the 100-mil (2.54mm) grid — e.g. 26.67mm = 21 ×
1.27mm. Snapping to 2.54mm displaced those coordinates by 1.27mm,
moving labels off their pins and increasing floating-label count.
KiCAD source confirms: DEFAULT_CONNECTION_GRID_MILS = 50 and the ERC
off-grid check uses exact integer modulo against this value, so any
displacement breaks connectivity unconditionally.
Also update the kicad-source absolute path in CLAUDE.md.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Four tools added in this branch had no docs coverage. Add entries to
SCHEMATIC_TOOLS_REFERENCE.md with parameter tables, response field
tables, and usage notes. Update section tool counts (Net Analysis 4→5,
Validation 3→6).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
get_pin_net was a superset of get_wire_connections with the same
coordinate-based flood-fill but two extra response fields (net, query_point)
and a reference+pin input mode. Having both tools confused LLM tool selection.
get_wire_connections now:
- Returns net (label name or null) and query_point in all response paths
- Accepts reference+pin input in addition to x/y coordinates,
resolving the pin endpoint via PinLocator internally
get_pin_net tool, handler, schema, TS registration, and tests removed.
test_wire_connectivity.py updated with coverage for all new behaviour.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Answers "what net is pin X of component Y on?" without requiring
callers to triangulate from list_schematic_nets or know a wire
coordinate first.
Accepts either {reference, pin} (resolved via PinLocator) or {x, y}
coordinate. Returns net label name (or null for unnamed nets), all
connected pins, wire segments, and the resolved query point.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Adds a new MCP tool that snaps wire endpoints, junction positions, and
net label coordinates to the nearest grid point (default 2.54 mm). Off-grid
coordinates cause wires that appear visually connected to fail ERC checks
because KiCAD uses exact IU integer matching internally; this tool eliminates
that class of error before running ERC.
- python/commands/schematic_snap.py: core snap logic with in-place sexp mutation
- python/kicad_interface.py: route + handler
- python/schemas/tool_schemas.py: JSON schema (gridSize, elements params)
- src/tools/schematic.ts: TypeScript MCP tool registration
- tests/test_snap_to_grid.py: 20 unit + integration tests (all passing)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Detects wire segments with at least one dangling endpoint — an endpoint
not connected to a component pin, net label, or another wire. These
cause ERC 'wire end unconnected' violations and are a common symptom of
incomplete routing or stray stub wires.
Algorithm uses exact KiCad IU (10 000 IU/mm) coordinate matching,
consistent with wire_connectivity.py:
1. Build an endpoint-frequency map for all wires (IU precision)
2. Collect anchored IU points: component pins (via PinLocator),
net labels / global_labels, power symbol pins
(via _parse_virtual_connections)
3. An endpoint is dangling when it is touched by exactly one wire AND
is not an anchored point; the containing wire is reported
Does not require the KiCad UI to be running.
Changes:
python/commands/schematic_analysis.py — find_orphaned_wires() function
python/kicad_interface.py — handler + route registration
python/schemas/tool_schemas.py — MCP schema entry
src/tools/schematic.ts — TypeScript server.tool() call
tests/test_schematic_analysis.py — 7 integration tests
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- add_schematic_net_label: document new optional componentRef/pinNumber
snap-to-pin mode, labelType/orientation params, response fields
(actual_position, snapped_to_pin), and updated position to optional
- connect_to_net: document new response fields (pin_location,
label_location, wire_stub)
- get_schematic_pin_locations: update cross-reference to reflect that
direct pin snapping is now available in add_schematic_net_label
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
add_schematic_net_label now accepts optional componentRef + pinNumber to
snap the label directly to the exact pin endpoint via PinLocator, removing
all approximation risk. The response always includes actual_position and,
when snapping was used, snapped_to_pin — so the caller gets confirmation
of exactly where the label landed.
connect_to_net return type changed from bool to Dict, returning
pin_location, label_location, and wire_stub on success so agents no
longer need a separate verification call to confirm placement.
connect_passthrough updated to check result.get("success") against the
new dict return. tool_schemas.py and schematic.ts updated to match
(position is now optional, componentRef/pinNumber/labelType/orientation
added, connect_to_net schema field names corrected).
17 new unit tests in tests/test_net_label_pin_snapping.py.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Move all Python test files from python/tests/ to the top-level tests/
directory to match the project's CONTRIBUTING.md guidelines. Update
sys.path inserts and template path references to reflect the new
location.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Fix incorrect default Claude Desktop config path — macOS uses
~/Library/Application Support/Claude/claude_desktop_config.json,
not ~/.config/Claude/claude_desktop_config.json.
Capture stderr in merge_config subshell (2>&1) so Python tracebacks
and interpreter errors are surfaced instead of silently dropped when
the command substitution fails under set -e.
Update README.md and docs/PLATFORM_GUIDE.md to reflect the corrected
macOS config path, and split the combined Linux/macOS config location
reference into separate per-platform entries.
Add trailing newline at the end.
Add setup-macos.sh, a shell script that automates Claude Desktop MCP
configuration on macOS. The script detects KiCad's bundled Python,
resolves PYTHONPATH, generates the correct MCP server config, and
safely merges it into the existing Claude Desktop configuration with
backup support. Supports --verify, --dry-run, and --apply modes.
Update README.md with documentation for the automated setup workflow,
including usage examples, parameter reference, and post-setup steps.
Extend docs/PLATFORM_GUIDE.md with macOS-specific sections covering
installation, path handling, Python environment, troubleshooting,
best practices, cross-platform migration, and support resources.
Update docs/STATUS_SUMMARY.md to reflect the new macOS automation
capabilities and bump the last-updated date.
Previously passing mirror='x' or mirror='y' to rotate_schematic_component
always raised:
'NoneType' object has no attribute 'value'
Root cause: kicad-skip has no API for setting (mirror x/y) on a placed
symbol instance. The handler tried to use a non-existent kicad-skip
attribute, returning None, then calling .value on it.
Fix: add _apply_mirror_to_symbol_sexp() which directly patches the
(mirror x/y) S-expression token in the .kicad_sch file. The rotate
handler now applies rotation via kicad-skip (which works fine) and
delegates mirror to this helper.
The helper:
- Inserts (mirror x/y) immediately after the (at x y rot) token
- Removes any existing mirror token before inserting the new one
(prevents duplicate tokens when toggling axis)
- Returns False gracefully when the reference is not found
Tests: 6 unit tests in tests/test_rotate_schematic_mirror.py
covering: add x, add y, remove, replace, unknown ref, no-mirror smoke test.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Previously the path argument to create_schematic() was accepted by the
tool schema but silently ignored in SchematicManager.create_schematic()
(python/commands/schematic.py). The schematic file was always written
using only the bare filename, resolving to the MCP server's working
directory.
On systems where that directory is not writable (e.g. Program Files,
OneDrive-synced folders) this caused:
[Errno 13] Permission denied: 'myproject.kicad_sch'
Fix:
- Add path: Optional[str] = None parameter to SchematicManager.create_schematic()
- Compute output_path as os.path.join(path, base_name) when path is given
- Forward the resolved path from _handle_create_schematic() into create_schematic()
Tests: added tests/test_create_schematic_path.py with three unit tests
covering: path respected, no-path fallback, and no double-suffix on .kicad_sch names.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Add type annotations to all previously untyped functions and remove 9
suppressed error codes (call-arg, assignment, return-value, operator,
has-type, dict-item, misc, list-item, annotation-unchecked) by fixing
the underlying type issues.
Add [[tool.mypy.overrides]] with ignore_missing_imports for KiCAD-specific
modules (pcbnew, sexpdata, skip, cairosvg, kipy, PIL) so the pre-commit
mypy hook passes in its isolated venv. Add types-requests and pytest to
additional_dependencies in .pre-commit-config.yaml.
Also fixes several real bugs uncovered by stricter checks: incorrect static
calls to instance methods in swig_backend, wrong return type on get_size,
missing value param in BoardAPI.place_component, variable shadowing in
kicad_process.py, unqualified LibraryManager reference in kicad_interface,
and missing top-level Path import.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
With --system-site-packages, mypy can resolve pcbnew, skip, and sexpdata
directly from the system/venv, so per-module ignore_missing_imports
overrides are no longer needed.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
These packages are not imported anywhere in the codebase, so their
ignore_missing_imports overrides were unnecessary.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Remove global ignore_missing_imports and the import-untyped disable,
replacing them with targeted per-package overrides for third-party
libraries that lack stubs (pcbnew, skip, sexpdata, cairosvg, kipy,
schematic). Also add python/ to mypy_path so internal modules resolve.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Add list_schematic_nets, list_schematic_labels, and get_schematic_view
to the longRunningCommands list so they use the 10-minute timeout
instead of the default 30 seconds. These commands regularly exceed
the 30s limit on larger schematic files.
