Node.js was loading src/index.ts at runtime (raw TypeScript) because
main pointed to the source. At runtime it tried to resolve './damage'
without an extension which fails in Node's ESM resolver.
Pointing main to dist/index.js makes Node load the compiled CommonJS
output produced by `tsc` during the build step.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>