Add eslint.config.mjs (flat config) using @typescript-eslint/eslint-plugin
flat/recommended rules. Add npm run lint script (exits 0 on current codebase).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Add src/placeholder.test.ts to confirm the Vitest harness works
end-to-end (npm test passes). Update CLAUDE.md project structure
to reflect the now-created src/ directory.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>