[BUG] Malformed YAML in skill description breaks slash command autocomplete

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 typing /, the autocomplete menu appears, but typeahead filtering doesn't work. Typing additional characters (e.g., /config) does not filter the command list - all commands remain visible regardless of what I type.

What Should Happen?

After typing /, continuing to type should filter the command list to show only matching commands. For example, typing /com should filter to show only /compact, /commit, /commands, etc.

Error Messages/Logs

````shell
No error messages. The menu appears but does not respond to typed characters for filtering.

````

Steps to Reproduce

1. Open Claude Code in terminal
2. Type / - autocomplete menu appears (correct)
3. Continue typing, e.g., /config
4. Observe: command list is not filtered, all commands still visible
5. Must manually scroll/arrow through full list to find command

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.25

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Other

Additional Information

• Tested in Ghostty and native macOS Terminal - same behavior in both
• Tried installing older versions and stable release - issue persists
• No custom keybindings or settings affecting this
• ~/.claude/settings.json has no relevant configuration

attaching a preview as well:

!Image