[BUG] "model" option in custom slash command not working

Environment

• Platform (select one):
• [ ] Anthropic API
• [ ] AWS Bedrock
• [ ] Google Vertex AI
• [ ] Other: <!-- specify -->
• Claude CLI version: 1.0.67
• Operating System: macos
• Terminal: <!-- e.g. iTerm2, Terminal App -->

Bug Description

<!-- A clear and concise description of the bug -->

Steps to Reproduce

1. create slash command using snippet in docs https://docs.anthropic.com/en/docs/claude-code/slash-commands#frontmatter
2. run command inside claude code cli

Expected Behavior

works.

Actual Behavior

API Error: 404 {"type":"error","error":{"type":"not_found_error","message":"model: haiku"}}

Additional Context

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