ai-agents-structured-output-bu-using-with-structured-output-with-a-pydantic-schem-38ca1b42

THEN Avoid List fields in Pydantic output schemas for Google Gemini models. Instead, either inline the list as separate fields, use a single string field with JSON parsing, or switch to a non-list representation. If a list is unavoidable, downgrade to a lower-level approach (e.g., manual JSON mode) or wait for a fix in the integration. Test with a flat schema first to ensure the API call succeeds.

class Plan(BaseModel):
    step_1: str = Field(...)
    step_2: str = Field(...)