Claude Code installed plugins not available in agent-shell

[jcasse]

Checklist

• I agree to communicate with the author myself (not AI-generated).
• I've read the README's Filing issues section.
• I'm running the latest versions (fill in below).
  • agent-shell version: 20260329.1008
  • acp.el version: 20260325.1158
  • ACP package (e.g. claude-agent-acp) version: 0.20.2
  • Agent CLI (e.g. claude, gemini) version: Claude Code v2.1.81
• For requesting new agent support, I'm including a link to the ACP-capable agent or related ACP package.
• For issues, I'm including ACP traffic (as per README).

Traffic doesn't show any problems:

:direction incoming
:kind      notification
:object
           jsonrpc 2.0
           method  session/update
           params
                   sessionId 4be1e04c-6cc7-4f6a-99c5-d548374c17fd
                   update
                             sessionUpdate usage_update
                             used          36182
                             size          200000
                             cost
                                           amount   0.23420875000000002
                                           currency USD

I've installed a plugin to Claude Code. The plugin is available in Claude Code CLI on the macOS Terminal.

However, it is not available from agent-shell. Other MCPs and skills that I have also installed are available in agent-shell, but not the plugin.