nx_pcb_autoroute.nx

nx_pcb_autoroute.nx -- LIB: sovereign PCB copper AUTOROUTER, built by REUSING the silicon place-and-route router (nx_fpga_pnr / pnr_route_net_ex). ONE shared routing engine serves BOTH FPGA fabric routing AND PCB trace routing -- the "shared resources" architecture, literally. Routes a netlist of 2-pad nets on a single copper layer (a WxH grid); node-keepout blocking keeps different nets NODE-disjoint (no shorts / crossings = the core DRC). Reports total copper length + a short count (0 = DRC-clean) + a routed flag. This closes the omniforge ED "interactive autorouter" gap sovereignly (vs KiCad/Freerouting -- benchmark only). never-brick #26: pure memory, bounded (BFS <= W*H per net), deterministic, zero hardware writes. license_tier: ORIGINAL