Live Quarto extension handled differently by Positron/VS Code vs RStudio

Bug description

Hi,

Both VS Code and Positron handle the live Quarto extension differently from RStudio.

Steps to reproduce

1. Create a book project my_book.
2. Install quarto-live in the root folder: quarto add r-wasm/quarto-live.
3. Create another folder, say chapter_01
4. In chapter_01 create chapter_01.qmd.

• Populate the file with

---
title: "Chapter-01"
format: live-html
engine: knitr
webr:
  packages:
    - tidyverse
    - infer
    - insight
---

{{< include ../_extensions/r-wasm/live/_knitr.qmd >}}

```{webr}
# Testing


```

5. Add - chapter_01/chapter_01.qmd to chapter: in _quarto.yml.

Just for reference:

If you render this project using VS Code or Positron, it will not work properly.

If you render using RStudio it will.

Actual behavior

• Rendering using VS Code:

Expected behavior

• Rendering using RStudio:

Your environment

Quarto: 1.7.32

Positron:

Positron Version: 2025.07.0 build 204
Code - OSS Version: 1.100.3
Commit: 03ae7a5393c776bb24c23d2aa6a6bfbba90cbc5e
Date: 2025-06-30T16:29:03.492Z
Electron: 34.5.1
Chromium: 132.0.6834.210
Node.js: 20.19.0
V8: 13.2.152.41-electron.0
OS: Darwin arm64 24.5.0

Rstudio:

RStudio 2025.05.1+513 "Mariposa Orchid" Release (ab7c1bc795c7dcff8f26215b832a3649a19fc16c, 2025-05-30) for macOS
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) RStudio/2025.05.1+513 Chrome/132.0.6834.210 Electron/34.5.1 Safari/537.36, Quarto 1.7.32 (/Applications/quarto/bin/quarto)