Description

I'm using createAgentUIStreamResponse. When the user clicks the stop button using stop function from useChat before the AI generates any response, a ZodError is thrown due to an empty message parts array.

plz let me know how to handle stop function

Steps to Reproduce

1. Click the chat button to send a message
2. Immediately click the stop button before the AI starts responding
3. Observe the error

[cause]: Error [ZodError]: [
  {
    "origin": "array",
    "code": "too_small",
    "minimum": 1,
    "inclusive": true,
    "path": [7, "parts"],
    "message": "Message must contain at least one part"
  }
]

AI SDK Version

• ai: 6.0.3
• @ai-sdk/react: 3.0.3

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