seveibar/nema17-rp2040-stepper-controller

routing/README.md

# Saved PCB routing

`route-plan.json` is the compact 42 × 42 mm revision C routing input and solution for core 0.0.2199. `saved-routing.ts` supplies it through the local routing algorithm interface. Core regenerates traces, vias, pours and its normal diagnostics.

The input guard rejects changed geometry or connectivity. Regenerate and validate routes after changes; do not bypass the guard by replacing only `expectedInput`.

The older ground-pour selection files are retained for source compatibility but are disabled by default and do not apply to this revision. Current pours are regenerated normally.

Run `bun run verify`; run `python3 scripts/audit-manufacturing.py dist/index/circuit.json` with NumPy and Shapely installed for the independent copper audit. Physical qualification is still required before fabrication release.

The shared core ground-plane stitch joins copper away from capacitor pads and is attributed to the MCU common-ground source (`GND_G`). Individual capacitor spurs keep their original length constraints. The independent copper audit verifies that these pours and the stitch form one connected ground net.