Bug: Quarto appears twice in the Outline for repository files

Summary

The Outline view displays the Quarto document section twice when a Quarto document is opened from a repository. Both entries contain the same heading hierarchy, resulting in a duplicated outline.

System details

<details> <summary>Positron and OS details</summary>

Component | Version / details -- | -- Positron | 2026.07.1 build 5 Code - OSS | 1.118.0 Commit | d3cdd608df5afa3378c24c9a9c81b01fe1433a87 Build date | 2026-07-08T19:52:09-06:00 Electron | 39.8.8 Chromium | 142.0.7444.265 Node.js | 22.22.1 V8 | 14.2.231.22-electron.0 OS | Darwin arm64 25.6.0 Quarto | 1.135.0

</details>

<details> <summary>Session details</summary>

• Document type: Quarto document (.qmd)

• Code cell language: Python

• LLM model: Not applicable

</details>

Steps to reproduce

1. Open a repository in Positron.

2. Open a Quarto document (.qmd) containing at least two headings and a Python code cell.

3. Open the Outline view.

4. Observe that the Quarto section appears twice.

5. Expand both sections and observe that they contain the same heading hierarchy.

Actual behavior

The Outline contains two identical Quarto sections, each with the same headings beneath it.

Duplicate Quarto sections in the Outline view

Expected behavior

The Outline should display the Quarto document only once, with a single Quarto section and one heading hierarchy beneath it.

Error messages

No error messages were observed in the UI, Output panel, or Developer Tools console.

Additional context

This may be related to Outline support for files opened from repositories. The duplicate section is distracting and makes the Outline harder to use for document navigation.