Connect net labels to existing same-net traces

[Sang-it]

Summary

• reimplement Connect net labels to existing same-net traces #869 on top of current main
• add NetLabelToSameNetTraceSolver as the final pipeline stage
• connect labeled trace branches and eligible port-only labels to nearby existing traces on the same global net
• join recovered paths at an unoccupied direction on existing trace geometry
• orthogonalize near-aligned continuations with a small terminal jog instead of rejecting a diagonal subsolver result
• remove source and redundant target labels only after a safe route is accepted
• retain at least one visible label and its connector for power nets and nets allowing y+ labels
• always retain the protected label with the highest schematic anchor y value on each global net
• resolve aliased power-net names through global connectivity before deciding label retention
• prevent recovered routes from entering retained label interiors while allowing approaches along the label anchor/exterior boundary
• regenerate and visually review affected routing snapshots, including the PMP11282 fixture added on latest main

Safety checks

Candidates must share a non-ground global net and schematic section. Branch continuations must be aligned within 0.15 units; standalone ports must be within 5 units of existing copper. The solver rejects non-axis-aligned routes, restricted-centerline crossings, collisions, cross-net intersections, unintended same-net overlaps, and paths through rendered labels. Protected labels are reserved before recovery so other branches can join their traces without removing the visible label or its port connector.

Verification

• bun test (215 pass, 4 skip)
• bunx tsc --noEmit
• bun run format:check
• git diff --check
• bun run debug:pipeline tests/assets/example51.json --out /tmp/schematic-trace-debug-example51-net01-connected --stop-after netLabelToSameNetTraceSolver --svg

Supersedes #869.

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Project	Deployment	Actions	Updated (UTC)
schematic-trace-solver	Ready	Preview	Aug 26, 2026 7:01pm