AI-native schematic design agent, purpose-built for KiCad (zero-dependency pure-stdlib Python CLI): author and edit .kicad_sch from JSON op-lists with net-diff safety rails, run ERC/design/intent/BOM checks, simulate on KiCad's bundled ngspice, source real parts and fetch datasheets, and import Altium .SchDoc/.SchLib/.PcbDoc read-only into KiCad
