Function write

__tests__/adaptive-explore-sizing.test.ts:72–73

(name: string, body: string)

    fs.mkdirSync(srcDir);

    const write = (name: string, body: string) =>
      fs.writeFileSync(path.join(srcDir, name), body.trimStart());

    // The interchangeable contract — 4 implementers below => sibling family.
    write(