# Codex Report — 2025-10-09T23:57:49Z

## Objective
- Align the DrawIO RDF export plugin’s UI and download metadata with its Turtle output format.
- Reinstate golden regression coverage in Bun by porting the legacy rdflib isomorphism checks to the Pyodide-backed pipeline.

## Materials Reviewed
- `src/main/webapp/plugins/rdfexport/src/rdfexport.ts`
- `src/main/webapp/plugins/rdfexport/tests/rdfexport.test.ts`
- Legacy pytest suite under `src/main/webapp/plugins/rdfexport/legacy/tests/test_patched_parser.py`
- Turtle and N-Triples fixtures within `src/main/webapp/plugins/rdfexport/tests/{fixtures,baselines}`

## Actions
1. **UI parity update**: Adjusted the plugin resource string, default filename, format identifier, and MIME type so the menu entry and saved file all advertise Turtle (`.ttl`, `text/turtle`).
2. **Bundled artifact refresh**: Mirrored the same string, extension, and MIME updates in the compiled `rdfexport.js` bundle to keep runtime output consistent without rerunning the build pipeline.
3. **Regression harness**: Augmented the Bun test harness to locate `.nt` baselines, export Turtle via Pyodide, and execute the rdflib isomorphism/normalisation routine lifted from the pytest suite (filtering OWL ontology declarations) for every DrawIO fixture.
4. **Fixture iteration**: Updated the test loop to skip only fixtures lacking `.nt` baselines and tightened expectations around Turtle file naming and MIME typing.
5. **Environment preparation**: Synced Python dependencies with `uv`, pulled Pyodide assets, and ensured `.venv` is on `PATH` so `bun run test` can exercise the regenerated legacy checks locally.

## Testing
- `bun run check`
- `bun run test`

## Follow-up Notes
- Future changes to Turtle serialisation should keep the normalisation helper in sync with the Python version to avoid false negatives.
- The Pyodide asset download adds ~335 MB; cache retention would speed up subsequent CI runs.