in script/build.ts [104:113]
async function writeTsOutput(collection: ModeCollection): Promise<void> {
for (const [_name, vars] of collection) {
let output = JSON.stringify(camelcaseKeys(vars.tree(), {deep: true}), null, ' ')
output = `export default ${output}`
const dir = path.join(tsDir, collection.type)
await mkdirp(dir)
fs.writeFileSync(path.join(dir, `${vars.name}.ts`), output)
}
}