[BUG] Failed to install plugin" i Cowork på macOS

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?

Steps to reproduce:

Open Cowork in Claude Desktop on macOS
Browse plugins and click "Add" on any plugin
Toast notification appears: "Failed to install plugin"

Environment:

macOS
Active Pro plan
Claude Desktop (Cowork mode)

Please prioritize a fix — looking forward to using plugins!

What Should Happen?

Steps to reproduce:

Open Cowork in Claude Desktop on macOS
Browse plugins and click "Add" on any plugin
Toast notification appears: "Failed to install plugin"

Environment:

macOS
Active Pro plan
Claude Desktop (Cowork mode)

Please prioritize a fix — looking forward to using plugins!

Error Messages/Logs

Steps to Reproduce

Steps to reproduce:

Open Cowork in Claude Desktop on macOS
Browse plugins and click "Add" on any plugin
Toast notification appears: "Failed to install plugin"

Environment:

macOS
Active Pro plan
Claude Desktop (Cowork mode)

Please prioritize a fix — looking forward to using plugins!

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

newest

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_