Insiders Feedback: MCP Apps: Pull request branch picker overflows the app container

Maintainers usually reply within 2 days

Assessment

Research direction

Description

Version: Insiders

Feature: GitHub MCP App for pull request creation

Feedback:
The branch picker in the GitHub MCP App's pull request creation form can overflow its container. In the attached screenshot, the right-hand compare branch picker extends past the form's right edge when displaying a long branch name.

Steps to Reproduce
Open the GitHub MCP App's pull request creation form.
Select a branch with a long name in the right-hand compare branch picker.
Observe the picker at the container width shown in the screenshot.
Expected Behavior
The branch pickers remain within the MCP app container, including when displaying long branch names.

Actual Behavior
The right-hand branch picker extends beyond the container's right edge. The affected control is circled in the screenshot.

Also reported in the vscode repo if it's not relevant here - https://github.com/microsoft/vscode/issues/346696

Getting set up

First steps

1. Read the whole issue, then the project's contributing guide.
2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
3. Fork the repository and make your change on a branch.
4. Open a pull request that references the issue number.

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