Show HN: Copperhead – Hardware as Fast as Software

Copperhead is an open-source AI agent that edits KiCad circuit-board files, updates all related documents, and runs ERC/DRC checks until they pass. It requires a validated change proposal, locks edit tools until approval, and propagates single-value changes across all referencing files. The CLI is free; paid plans add hosted runs, team governance, and enterprise features.