# Codex Engineering Report — 2025-09-22 16:30 UTC

## Objective
Integrate the RDF export plugin's Preamble controls into the Diagram format panel so they render as a first-class section ahead of the default "View" group, align the CSV/Base URI inputs with native styling, and synchronize automated tests with the new attachment flag.

## Key Changes
- Refactored the `installCsvPathProperty` hook to assemble a dedicated `geFormatSection` node, assign it the `data-rdfexport-preamble-section` marker, and insert it ahead of existing FormatPanel sections.
- Reused `createTitle`/`createOption` helpers while re-styling their outputs to hide the stub checkbox, convert labels to `<label>` elements, and stretch the text fields with native spacing (including the 6px trailing margin on the CSV input).
- Ensured the Base URI/CSV fields and the Edit Preamble button append to the new section while preserving the model listeners that keep inputs synchronized with document attributes.
- Added DOM fallbacks so tests running with minimal stubs still mount the section even when no parent container is available.
- Updated tests to understand the new section attribute, assert placement before the legacy "View" group, validate style adjustments, and target `__rdfexportPreambleAttached`.
- Regenerated the compiled `plugins/rdfexport.js` bundle so runtime environments pick up the revised logic and attribute markers.

## Testing
- `bun install` within `src/main/webapp/plugins/rdfexport`
- `bun build src/rdfexport.ts --minify --outfile=../rdfexport.js`
- `bun test src/main/webapp/plugins/rdfexport/tests/rdfexport.test.ts`

## Notes
- Extended the ElementStub utility with `insertBefore`/`firstChild` semantics to emulate the DOM APIs used during section insertion.
- Verified the compiled bundle contains the new data attribute flag to guard against regression.