[BUG] Claude Agents Plugin Skills Autocomplete is inconsistent with a normal session

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 I want to trigger a plugin installed skill from the Claude Agents view, the autocomplete expects the full prefix, e.g /superpowers:brainstorming. However, in a normal interactive session /brainstorming works fine. Also the autocomplete matching is not very sophisticated. Even if the skill in context is /superpowers:brainstorming typing in /brainstorming should show a suggestion for the full skill name.

What Should Happen?

instead of having to type in /superpowers:brainstorming typing in /brainstorming should work or at the very least show a suggestion for the full skill name.

Error Messages/Logs

Steps to Reproduce

1. install a plugin, i.e superpowers.
2. In claude agents view, try to invoke that plugin without prefixing with superpowers:

Claude Model

Not sure / Multiple models

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.156

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Other

Additional Information

<img width="853" height="141" alt="Image" src="https://github.com/user-attachments/assets/bdd9134a-17c0-43aa-b86e-81d4ed7340e7" />

<img width="527" height="144" alt="Image" src="https://github.com/user-attachments/assets/fb0b58c3-7de6-4085-a789-020ff78a51af" />