Swipe sideways — the board is 1180 px wide. Taps still flip switches; drag parts on a wider screen.
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A project is the whole board — every part, wire, switch and position. Loading one later replaces whatever is on the board; your module library is never touched.
Paste all of it into any chat model, replace the last line with what you want built, then feed the JSON it returns back through import. The primitive and library tables in the text are generated from what is loaded right now, so the model is only ever told about modules that actually exist.