The horizontal IN1 lines you see was because I explicitly requested one direction per layer as a routing style. This job was Opus 5.5 and took about 8 hours. It relied on a custom PCB viewer and KiCAD 11 (unreleased) because it has a headless IPC mode. The agents used kypi (official module) to work with KiCAD programmatically. The API does not alow showing the board view with net labels, so the custom viewer was needed. They also ran custom IR solvers to identify weak pours. Schematics were in Skidl, this helps the agent comphrehend the design better than a KiCAD shematic would. https://imgur.com/a/v57jbvU

PS Astra and Opus were both good with schematics (and Fable), but Astra was notably worse at layout than Opus. Astra can still review layouts well, just not make them as well (n=1 though).

Close to human expert according to: https://x.com/jlcjak/status/2119917708846260729