# Contributing

Please open an issue before a large change. Keep all merge and generation paths
bounded, local and deterministic except explicitly cryptographic random fields.
Never introduce remote assets, arbitrary markup injection or silent printer
assumptions.

Run `npm run check` and `npm run test:browser` before proposing a change. New
stock presets need a documented geometry source and must retain the instruction
to verify physical sheets. Contributions are accepted under GPL-3.0-or-later.