Add standalone solder paste apertures - #3661
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Part of the tested implementation for tscircuit#3577. Prepared with Codex AI assistance.
Part of the tested implementation for tscircuit#3577. Prepared with Codex AI assistance.
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Implements the existing
<solderpaste>primitive so a continuous copper pad can have multiple independent stencil apertures. The windowpane regression contains nine 3 mm square paste openings over one 20 mm diameter copper pad.Fixes #3577
The renderer registers rectangle/circle JSX elements, emits independent
pcb_solder_pasterecords, preserves footprint placement and board-side transforms, and moves the apertures during PCB layout. No new dependency or schema change is required. Usage documentation includes suppressing an SMT pad's default paste aperture.Validation: 17 focused solderpaste/SMT-pad tests passed (261 assertions); the three new tests passed again from the published branch (178 assertions). Full TypeScript check and package build passed. Two PCB snapshots were rendered and visually inspected. The original implementation fails the windowpane test with an unsupported component error. Tests compare rectangular paste perimeters to independently emitted copper geometry at 0, 90, 180, 270 and 37 degrees on both board sides.
This PR covers core Circuit JSON generation. The local windowpane example was also run through current exporters: Gerber output contains nine rectangular paste flashes over one continuous copper contact. The current KiCad exporter ignores independent paste records and recreates a full-pad paste layer, so KiCad support needs a separate downstream fix. Native application opening and physical stencil fabrication have not been validated.
Implementation, tests, and this description were prepared with Codex AI assistance.