007: Pin-ref fix not active after /mcp reconnect (transport
reconnect doesn't reload Python modules). 008: Reply confirming
server restart required to load new sexp_parser.py code.
sch.components.get() returns only the first unit instance for a given
reference. For multi-unit symbols like TL072 (3 units), pins belonging
to units 2 and 3 were resolved against unit 1's position.
Added pin-to-unit mapping via KiCad sub-symbol naming convention
(e.g. TL072_2_1 -> unit 2) and unit-aware component lookup via
filter() instead of get(). Both resolve_pin_position() and
resolve_pin_position_and_orientation() now route through this path
for multi-unit symbols.
Pass unit field through to kicad-sch-api's native multi-unit validation
instead of custom bypass. Removes _add_multi_unit() that used incompatible
internal API (_add_item vs _add_item_to_collection across API versions).
Wire collision detection: apply_batch now tracks placed wire segments and
detects collinear stubs on the same axis with overlapping ranges belonging
to different nets. Colliding wires shift perpendicular to their axis by
1.27mm, preventing KiCad from merging wire segments into mega-nets.
Project-local library resolution: apply_batch now scans batch component
lib_ids for unknown libraries and registers them with kicad-sch-api's
SymbolLibraryCache via sym-lib-table parsing before component placement.
Unblocks projects using Samacsys and other non-standard symbol libraries.
Root ERC: run_schematic_erc accepts root=True to resolve to the project
root schematic before running kicad-cli, enabling hierarchy-aware ERC
that eliminates ~180 false-positive global_label_dangling warnings from
sub-sheet isolation.
270/270 tests pass, ruff + mypy clean.
