gokul/fieldkit-usb

docs/routing-investigation.md

# Routing record

The route was generated from the final 90 × 60 mm, two-layer geometry with the official local `@tscircuit/capacity-autorouter` 0.0.954. The pipeline completed topology planning, high-density routing, trace simplification, joint DRC repair, and power-trace expansion.

Final router result:

- 35 nets
- 164 routed traces
- 116 vias
- zero jumpers
- zero router errors

The official output is stored in `routing/reviewed-route.json`. `routing/reviewed-router.ts` refuses to replay it if the board geometry, obstacles, rules, or net topology changes.

Final validation uses tscircuit source/netlist/pin/placement checks, Gerber bitmap short detection, and an independent physical-connectivity check based on the final PCB copper graph. The connectivity check covers 199 electrical terminals across all 35 nets and reports zero failures.