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Python SDK Reference / A2A Extensions / UI Extensions / Error 
from agentstack_sdk.a2a.extensions.ui import Error
Bases: BaseModel This extension helps display errors in a user-friendly way with:
  • A clear error title (exception type)
  • A descriptive error message
Visually, this may appear as an error card in the UI. Properties:
  • title: Title of the error (typically the exception class name).
  • message: The error message describing what went wrong.

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Class Attributes

AttributeTypeDefault
titlestr—
messagestr—