copperhead

Cursor for circuit boards. An AI agent that designs, documents, and validates real PCBs from a prompt, working directly on existing KiCad repositories.

What it is:

An AI product-development agent for hardware: from a product brief to manufacturable files, firmware, and a build plan.

• copperhead create: full pipeline from a natural-language brief: spec, architecture, part selection, schematic, first-draft layout, then gerbers, firmware scaffold, and dev plan.
• copperhead do "<change>": operates on an existing KiCad repo the way a coding agent operates on a codebase.

It reads and edits real .kicad_sch / .kicad_pcb files (s-expression text), maintains markdown design docs as memory, propagates every change across all artifacts that reference it, and verifies its own work by running kicad-cli ERC/DRC until the checks pass.