[BUG] All slash commands broken in v2.1.89 ("Unknown skill" error)

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?

After upgrading from v2.1.87 to v2.1.89, all slash commands (/pm, /commit,
etc.) fail with the error:

Unknown skill: <command_name>

Steps to Reproduce

1. Upgrade Claude Code from v2.1.87 to v2.1.89
2. Run any slash command (e.g. /pm, /commit)
3. Observe "Unknown skill" error

Environment

• Claude Code version: 2.1.89 (broken), 2.1.87 (working)
• OS: macOS Darwin 23.3.0
• Shell: zsh

What Should Happen?

Slash commands execute normally (as they do in v2.1.87).

Error Messages/Logs

Steps to Reproduce

1. Upgrade Claude Code from v2.1.87 to v2.1.89
2. Run any slash command (e.g. /pm, /commit)
3. Observe "Unknown skill" error

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

2.1.87

Claude Code Version

2.1.89

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

iTerm2

Additional Information

_No response_