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fix(responses): include text.format when verbosity set for plain-text responses #2017

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fix(responses): include text.format when verbosity set for plain-text responses #2017

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fix(responses): include text.format when verbosity set for plain-text…
mshsheikh Oct 30, 2025
d61be03
fix(responses): use proper text.format object for plain-text verbosity
mshsheikh Oct 30, 2025
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9 changes: 7 additions & 2 deletions src/agents/models/openai_responses.py
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Original file line number Diff line number Diff line change
Expand Up @@ -299,7 +299,12 @@ async def _fetch_response(
if response_format is not omit:
response_format["verbosity"] = model_settings.verbosity # type: ignore [index]
else:
response_format = {"verbosity": model_settings.verbosity}
# When no output_schema is present, `text` needs an explicit format object.
# Use the plain text format object with verbosity to produce a valid `text` payload.
response_format = {
"format": {"type": "text"},
"verbosity": model_settings.verbosity,
}

stream_param: Literal[True] | Omit = True if stream else omit

Expand Down Expand Up @@ -501,7 +506,7 @@ def _convert_tool(cls, tool: Tool) -> tuple[ToolParam, ResponseIncludable | None
}
includes = None
else:
raise UserError(f"Unknown tool type: {type(tool)}, tool")
raise UserError(f"Unknown tool type: {type(tool)} for tool {tool!r}")

return converted_tool, includes

Expand Down