Show HN: Closed,Mechanical Mould Design AI Agent

Closed is a mould design AI agent that accepts a customer STEP file or part photo, keeps the customer's part locked, and drafts stages including parting, core and cavity, layout, mould base, feed, side actions and ejection, logging each stage. It pauses for human decisions when a rule is violated, shows the source of every dimension from one of six non-AI origins, and supports switching between agent and manual mode on the same model. Nothing ships until the user approves it; the macOS and Windows studio plus iOS and Android apps are not yet available and builds go to a waitlist first.