[BUG] Cannot find custom slash command under namespace

Environment

• Platform (select one):
• [-] Anthropic API
• [ ] AWS Bedrock
• [ ] Google Vertex AI
• [] Other: <!-- specify -->
• Claude CLI version: 1.0.93 (Claude Code)
• Operating System: macOS Version 15.6 Beta (24G5074c)
• Terminal: iterm2

Bug Description

namespace not working for command (can't find command with namespace)

Steps to Reproduce

1. echo "Analyze this code for performance issues and suggest optimizations:" > ~/.claude/commands/abc/optimize.md
2. confirm the command is created

~/ $ cat ~/.claude/commands/abc/optimize.md                                      
Analyze this code for performance issues and suggest optimizations:

1. restart claude, enter /abc or optimize

cannot find the command
<!-- What you expected to happen -->
optimize command is shown in the list

Actual Behavior

optimize command is not shown in the list

Additional Context

/doctor find no error
have restarted computer, but problem persists