Contributing

Open an issue first for anything larger than a small fix, so we agree on the direction before you spend time on it.

Fork the repo and branch from main.
node serve.mjs runs the editor at http://127.0.0.1:4192/. npm test runs the tests.
Keep to the layout in CLAUDE.md (where things go, and the rules that are easy to break). tests/architecture.test.mjs fails on a file that imports from the wrong folder.
Open a pull request against main. main takes no direct pushes; every change goes through a pull request.

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