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>
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 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>
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>
The TS<->Python communication channel uses stdout for JSON responses.
pcbnew's C++ SWIG layer can write warnings and diagnostics directly to
C-level stdout (fd 1), corrupting the JSON framing. The TS parser then
never sees valid JSON and the command times out after 30 seconds.
Three changes fix this:
1. Python stdout redirect: In main(), save the original stdout fd for
exclusive JSON response use, then redirect fd 1 to stderr so all
pcbnew C++ output goes to logs instead of the response pipe.
2. Robust TS JSON parser: tryParseResponse() now uses newline-delimited
parsing as a fallback. The Python side writes single-line JSON
terminated by \n; the parser uses this as the completion signal
instead of brace-matching, which prevents premature resolution of
truncated chunked responses. Non-JSON preamble lines are logged
and stripped.
3. Fix stray print() calls: Converted print() to logger in
component_schematic.py and library_schematic.py so they don't
leak to stdout during normal operations.
Also adds sync_schematic_to_board to the longRunningCommands list for
an appropriate timeout value.
When moving a schematic component whose pins directly touch pins of
stationary components (no wire segment, just pin-to-pin contact),
synthesize bridge wires to preserve the electrical connection after
the move. Also fixes duplicate-pin-position collision in old_to_new
map and updates symbol reference assignment to use setAllReferences.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
When moving a schematic component, connected wires are stretched/shifted
to follow the component (like KiCAD's drag behaviour), preserving
connectivity instead of leaving dangling wire stubs.
Also fixes property labels (value, reference, etc.) so they shift with
the symbol rather than staying at their original positions.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Add isort configuration (profile=black, line_length=100) to pyproject.toml,
add isort pre-commit hook, and auto-sort imports across all Python source files.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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>
Add .pre-commit-config.yaml with pre-commit-hooks v5.0.0 (trailing
whitespace, end-of-file fixer, yaml/json checks, large file guard,
merge conflict detection). Add minimal pyproject.toml. Auto-fix
trailing whitespace and missing end-of-file newlines across the
codebase.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Replace /home/chris/... absolute paths with Path(__file__)-relative
equivalents in wire_manager.py and pin_locator.py so the test
scripts work on any machine.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Replace inline Symbol() allocations with the existing _SYM_WIRE/_SYM_PTS/_SYM_XY
constants and new _SYM_AT/_SYM_LABEL constants for consistency.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Adds an optional `layer` parameter (e.g., 'F.Cu', 'B.Cu') to the
move_component tool. When specified, the component is flipped to
the target layer if it's not already on it. The response now also
includes the component's layer after the move.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
fix: JLCPCB database download and FTS search
Thanks! you rock. JLCPCB parts things has been a headache. I will look over the whole implementation this weekend.
- Rename add_schematic_connection → add_schematic_wire with waypoints[] parameter
- Add snapToPins (default true) to snap wire endpoints to nearest pin
- Expose add_schematic_junction as an MCP tool
- Break existing wires at new wire endpoints for T-junction support
- Remove orphaned add_connection / add_wire / get_pin_location from ConnectionManager
- Update tool registry to reflect renamed schematic tools in TS layer
- Add 76 tests for wire/junction handler dispatch, schema validation, and WireManager corner cases
- Apply Black and Prettier formatting to changed files
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Remove the 0.5mm query tolerance in favour of exact integer-unit matching
on all coordinate lookups (seed, label bridging, pin matching), mirroring
KiCad's own connectivity algorithm. Callers must supply exact wire endpoint
coordinates (e.g. from list_schematic_wires).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Update tool description and Python docstring to make clear that the
query point must be at a wire endpoint or junction — midpoints of
wire segments are not matched.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Shared-endpoint adjacency already connects all wires meeting at the same
point, making explicit junction handling a no-op duplicate.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Move wire connectivity logic from _handle_get_wire_connections into
commands/wire_connectivity.py. Use KiCad's internal integer unit system
(10,000 IU/mm) with exact coordinate matching instead of tolerance-based
float comparison, mirroring how KiCad itself determines connectivity.
Key improvements:
- Exact integer matching for wire endpoints (O(1) dict lookup vs O(n) grid scan)
- Junction support for T-connections
- Multi-unit symbol support (removed incorrect processed_refs dedup)
- Single public API: get_wire_connections()
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Replace runtime spatial-index queries during BFS with a pre-compiled
adjacency list for O(1) edge traversal. Also fix potential UnboundLocalError
for `ref` in the pin-checking exception handler and simplify validation.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Add +1 safety margin to grid_radius to handle banker's rounding at cell
boundaries in the spatial index
- Move symbol property guards inside per-symbol try/except to prevent
AttributeError from aborting all pin processing
- Replace O(n) connected_points scan for pin matching with spatial index
lookup (_frontier_has_neighbour), consistent with flood-fill approach
- Wrap float(x)/float(y) conversion with clear user-facing error message
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- Fix critical bug: use pin_data[0]/[1] instead of pin_data["x"]/["y"]
(get_all_symbol_pins returns List[float], not dict)
- Use index-based wire tracking to avoid fragile float list equality
- Check all polyline points (not just endpoints) during flood-fill
- Add spatial index (0.05mm grid) to replace O(n²) frontier scan
- Skip already-processed refs to avoid redundant calls for multi-unit symbols
- Include wires_out in early return when schematic has no symbols
- Add get_wire_connections schema entry to tool_schemas.py
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Given a single (x,y) coordinate on the schematic, flood-fills through all
connected wire segments and returns every component pin reachable on that net,
plus the full list of wire segments with their start/end coordinates.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
The JLCSearch API (jlcsearch.tscircuit.com) /components/list.json
endpoint ignores the offset parameter, returning the same 100 parts
on every request. This caused download_jlcpcb_database to loop
indefinitely, importing duplicate data for hours while blocking the
single-threaded Python process.
- Add download_jlcpcb.py: standalone script that downloads the
pre-built jlcparts database from yaqwsx/jlcparts GitHub Pages
(~1GB compressed, 7M+ parts, completes in ~4 minutes)
- Fix FTS search: add prefix wildcards to search terms so partial
MPN matches work (e.g. "BQ25895" now finds "BQ25895RTWR")
Library symbols use y-up coordinates while schematics use y-down. The
_transform_local_point function was not negating y, causing asymmetric
symbols (e.g. power:VEE) to have their bounding boxes computed in the
wrong direction — missing overlaps with adjacent components.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
KiCad's native ERC already checks for unconnected pins with better
accuracy (hierarchical sheets, bus connections, custom rules). Remove
the reimplemented version and its dead helper _parse_no_connects.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Parse graphical elements (rectangle, polyline, circle, arc, bezier) from
lib_symbols definitions to compute accurate symbol bounding boxes instead
of relying on pin positions with hardcoded degenerate expansion. This
fixes bbox accuracy for ICs (previously too small), tiny 2-pin passives
(previously too large), and single-pin symbols.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Eliminate repeated file parsing by extracting _extract_lib_symbols helper
that walks already-parsed sexp_data once instead of re-reading the file
per symbol via PinLocator. Support diagonal wire overlap detection using
cross-product parallelism and 1D projection. Fix wire region inclusion to
use AABB intersection for pass-through wires. Normalize view region
coordinates. Clarify tolerance docstrings across Python, TS, and schema.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Wires that start at a component pin but continue through the body were
incorrectly suppressed as "valid connections." Now nudges the pin endpoint
toward the other end and re-tests intersection — if the shortened segment
still hits the bbox, the wire passes through and is flagged.
Renamed the tool from check_wire_collisions to find_wires_crossing_symbols
across all layers (Python, handler, schema, TypeScript) to clarify that it
finds wires crossing over component symbols, which is unacceptable in
schematics.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
