Plugin stuck in broken state - can't install/uninstall/use

Description

A plugin appears to be in an inconsistent/broken state where it cannot be installed, uninstalled, or used.

Steps to Reproduce

1. Had plugin ralph-loop@claude-plugins-official previously installed
2. Run /plugin install ralph-loop → Shows "Plugin 'ralph-loop@claude-plugins-official' is already installed"
3. Run /plugin → Shows nothing (no content)
4. Run /plugin uninstall ralph-loop → Doesn't work
5. Cannot use the plugin

Expected Behavior

• /plugin should list installed plugins
• /plugin uninstall ralph-loop should successfully uninstall the plugin
• Plugin state should be consistent

Actual Behavior

Plugin appears to be in a broken state:

• Install says it's already installed
• Plugin list shows nothing
• Uninstall doesn't work
• Plugin is unusable

Environment

• Claude Code version: 2.1.29
• OS: macOS (Darwin 25.2.0)

Additional Context

The plugin system seems to have inconsistent state tracking, possibly a race condition or corrupted plugin registry.