# Task 1 – DrawIO Black Box Integration Report

## Author
- **Agent:** gpt-5-codex
- **Date (UTC):** 2025-10-08T18:09:43Z

## Objective
Implement the initial mock "black box" stage in the DrawIO RDF export workflow so that the serialized diagram XML is routed through the mock transformer before invoking the existing RDF/XML save logic. Maintain backward compatibility and extend the Bun-based test suite to cover the new behavior.

## Work Summary
1. **Black box scaffolding in the plugin source**
   - Added exported helper `runMockBlackBox` that prepends/annotates the serialized XML with deterministic metadata (`[BLACKBOX] len=<n>` ... `[/BLACKBOX]`).
   - Updated the `exportRdfXml` action flow to pass the serialized RDF/XML through the mock black box result before calling `editorUi.saveData`.
2. **Test coverage enhancements**
   - Introduced a dedicated unit test that asserts the black box output format and guarantees the original payload is preserved within the annotated string.
   - Adapted the existing integration/E2E fixture loop to validate that saved exports now match the annotated black box output derived from the legacy golden RDF fixtures.
   - Ensured the preamble/UI regression test loads the module via the helper and validates the black box helper remains accessible.
3. **Build artifacts**
   - Rebuilt `src/main/webapp/plugins/rdfexport.js` via `bun run build` to keep the bundled plugin in sync with the TypeScript source.
4. **Repository coordination**
   - Updated `AGENTS.md` task summary/status for Task 1 and noted the completion metadata.

## Testing
- `bun test` (from `src/main/webapp/plugins/rdfexport`) – verifies unit, integration, and regression coverage for the updated pipeline.

## Follow-up Recommendations
- Future Pyodide integration work should reuse `runMockBlackBox` as the hook point for bridging to the Python runtime; keep the exported helper stable or offer a wrapper to minimize churn in existing tests.
- When introducing real transformations, preserve deterministic annotations for testing or expose instrumentation hooks so Bun tests can continue verifying the saved payload without brittle string comparisons.

## 2025-10-08T19:42Z Update
- Restored the MD5-based fixture verification in the Bun integration loop so every exported payload is compared against the golden RDF fixtures using the historical checksum workflow.
- Added standalone assertions for the mock black box helper without weakening the regression harness, ensuring the annotated payload remains deterministic while the legacy hash guard stays in place.