Invalid Model Name for Haiku Agent in Command Execution

Question

**Bug Description**
When using a custom command /command and set agent to\
\
agent: Haiku\
\
 API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"system:      
     Invalid model name"}}

example command file:

allowed-tools: Bash(git status), Bash(git diff), Bash(git add .), Bash(git diff --cached), Bash(git commit -m *), Bash(git push)
description: Stage all changes, create a commit with a generated message, and push to remote. 
model: haiku
**Environment Info**
-