packages/core/src/index.ts is a pure re-export barrel with no behavior of its own, so its behavior tests belonged next to the module they exercise. Relocate the parser tests (and their roadmap todos) into a co-located parse_test.ts importing parse from ./parse.ts, and drop index_test.ts. A broken re-export is still caught by typecheck and by the bin package importing parse through the public entrypoint.