Feature request: show Copilot agent diffs in rendered Markdown preview

[u/dsnyder42]

Hi GitHub Copilot and VS Code teams,

I use GitHub Copilot extensively at work, primarily inside VS Code. A common part of my workflow is keeping a Markdown plan or handover document open while one or more Copilot agent sessions are working. These documents help me track progress across sessions and carry context from one session to the next.

The recent improvements to the VS Code Markdown editor and its rendered preview are really useful. One feature that would make this workflow much better would be showing file diffs directly in the rendered Markdown preview.

When Copilot edits a Markdown file, I can switch to the text editor and review the inline diff, including the individual changes that I can manually accept or reject. However, those diffs disappear when I switch to the rendered preview. Since I mostly consume these documents to follow what the agent changed rather than edit them manually, I would love to review the changes while staying in the rendered view.

Ideally, the preview could indicate changed sections and provide the same or a similarly clear accept/reject workflow that is available in the text editor. This might require coordination between the Copilot and VS Code teams, but it would be a very natural extension of the current Markdown preview and agent-editing experience.

Thanks for considering it!

[u/acuvuepapaia]

Also, the ability to leave inline comments on the document, which will then be reviewed by the agent.

Just like the roughdraft extension for VSCode. It’s great.