[BUG] /plugin command is not recognized in v1.3109.0 on 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?

The /plugin command is not recognized in Claude Code v2.1.101. When typing /plugin, it does not appear in the autocomplete menu.

What Should Happen?

According to the official documentation, the /plugin command should:

Open the plugin manager with tabs for Discover, Installed, Marketplaces, and Errors
Support subcommands like /plugin marketplace add, /plugin install, etc.

The documentation states: "If you don't see the /plugin command, update Claude Code to the latest version" - but v2.1.101 should definitely have this command (it was added in v1.0.33).

Error Messages/Logs

No error message - the command simply doesn't appear in autocomplete.

Steps to Reproduce

1. Install/update to Claude Code v2.1.101 on macOS
2. Launch Claude Code
3. Type /plugin
4. Observe: command does not appear in autocomplete dropdown

Claude Model

Not sure / Multiple models

Claude Code Version

2.1.101 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)