[BUG] Plugins are installed and uninstalled globally even when using multiple CLAUDE_CONFIG_DIR directories

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?

I'm using multiple local "profiles" via different CLAUDE_CONFIG_DIR settings (same account). Although installed plugins are supposed to be installed within the config dir, installing or uninstalling a plugin in one profile affects all others.

What Should Happen?

Installed plugins should be separate per config dir.

Error Messages/Logs

Steps to Reproduce

1. Copy ~/.claude to ~/.claude-foo
2. In ~/.zshrc add:

alias claude-foo='CLAUDE_CONFIG_DIR=~/.claude-foo command claude'
alias claude-default='CLAUDE_CONFIG_DIR=~/.claude command claude'

1. Run claude-foo.
2. Run /plugin
3. Install a plugin, e.g. frontend-design
4. exit
5. Run claude-default
6. Run /plugin, go to Installed
7. Surprise! frontend-plugin is there now.

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.98

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_