[ShiboSoftwareDev]

Board 109's 96-vertex circular outline produces 19,985 void rectangles, including 14,696 with a width or height below the existing EPS = 1e-9. Those rectangles are subsequently padded for board-edge clearance and inserted into every routing layer's obstacle index.

This reproduction adds only the captured outline fixture, a regression test, and the native seeding solver's full-board SVG snapshot with actual board-edge clearance. The test requires a compact decomposition without slivers and checks that exterior points stay blocked while interior points remain free. No production code changes.

Synced with rectdiff main (38873c5) in a9df408, preserving the newer projection, expansion, and spatial-index optimizations. The expected failing regression is unchanged.

Original reproduction validation on Bun 1.4.2, macOS ARM:

• Full suite: 104 pass, 1 existing skip, 1 expected failure (this regression).
• Type checking, build, format check, and git diff --check pass.
• SVG rendered and visually inspected.
• CI test job confirms 104 pass, 1 skip, and only this expected failure, with Received: 19985; CI format and type checks pass.

Reproduce:

bun install
bun test tests/compute-inverse-rects-board109.test.ts --timeout 9999999

Fixture source: captured board109 SRJ, reduced to outline, bounds, trace width, and board-edge clearance. Related edge-indexing work: #164 and tscircuit/tscircuit-autorouter#3135.

Conventions: existing Bun/SVG snapshot setup and test-assets/ fixture location; new helpers follow the handbook, including module scope, domain names, and the two-parameter rule.

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Project	Deployment	Actions	Updated
rectdiff	Ready	Preview	Oct 20, 2026 4:35pm UTC

[tscircuitbot]

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