[BUG] Plugin marketplace navigation auto-scrolls to bottom when using arrow keys preventing seeing which plugin is selected

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

When browsing a large plugin marketplace (e.g., https://github.com/wshobson/agents.git with 62 plugins), the list navigation has a scrolling issue that makes it difficult to browse marketplaces with more than 10 or so plugins in list

Current behavior:

• The plugins get listed and if entire is screen is full, it scrolls to bottom
• To see which plugin is selected by arrow key you need to scroll up
• After pressing down arrow, the list immediately auto-scrolls back to the bottom
• The selected item is no longer visible
• This happens repeatedly, making it impossible to browse the full list with keyboard navigation

<img width="876" height="228" alt="Image" src="https://github.com/user-attachments/assets/c32c452b-3483-41f6-80c7-a041cba16d01" />
<img width="911" height="204" alt="Image" src="https://github.com/user-attachments/assets/c76c1a73-abbd-4174-bc11-172593ce4700" />

What Should Happen?

Expected behavior:

• The list should auto-scroll to keep the currently selected item visible
• When navigating with arrow keys, the view should follow the selection
• Similar to standard terminal UI list behavior where the selected item stays in view

Error Messages/Logs

Steps to Reproduce

Steps to reproduce:

1. Run /plugin command
2. Select a marketplace with many plugins (62+ in this case)
3. The list initially displays at the bottom of the list (see screenshot 1)
4. Manually scroll up to see the top of the list
5. Press the down arrow key to navigate to the next item

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.0.14

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

iTerm2

Additional Information

Environment:

• OS: macOS (Darwin 24.6.0)
• Claude Code version: [run claude --version in terminal]
• Marketplace URL: https://github.com/wshobson/agents.git
• Number of plugins: 62

Impact:

This makes it very difficult to browse and discover plugins in larger marketplaces, as keyboard navigation is effectively broken.