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Python: DevUI: Serialize workflow input as string to maintain conformance #2021

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Merged
victordibia merged 2 commits into from
Nov 8, 2025
Merged

Python: DevUI: Serialize workflow input as string to maintain conformance #2021

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05ccbce
DevUI: Serialize workflow input as string to maintain conformance wit…
ReubenBond Nov 7, 2025
bcc685c
Merge branch 'main' into fix/devui-wf-serialization
victordibia Nov 8, 2025
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4 changes: 3 additions & 1 deletion dotnet/src/Microsoft.Agents.AI.Hosting.OpenAI/Responses/Models/ResponseInput.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -182,7 +182,9 @@ internal sealed class ResponseInputJsonConverter : JsonConverter<ResponseInput>
return messages is not null ? ResponseInput.FromMessages(messages) : null;
}

throw new JsonException($"Unexpected token type for ResponseInput: {reader.TokenType}");
throw new JsonException(
"ResponseInput must be either a string or an array of messages. " +
$"Objects are not supported. Received token type: {reader.TokenType}");
}

/// <inheritdoc/>
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14 changes: 14 additions & 0 deletions ...t/tests/Microsoft.Agents.AI.Hosting.OpenAI.UnitTests/OpenAIResponsesSerializationTests.cs
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Expand Up @@ -344,6 +344,20 @@ public void Deserialize_RefusalStreamingRequest_HasStream()
Assert.NotNull(request.Input);
}

[Fact]
public void Deserialize_InvalidInputObject_ThrowsHelpfulException()
{
// Arrange
const string Json = "{\"model\":\"gpt-4o-mini\",\"input\":{\"input\":\"testing!\"},\"stream\":true}";

// Act & Assert
var exception = Assert.Throws<JsonException>(() =>
JsonSerializer.Deserialize(Json, OpenAIHostingJsonContext.Default.CreateResponse));

Assert.Contains("ResponseInput must be either a string or an array of messages", exception.Message);
Assert.Contains("Objects are not supported", exception.Message);
}

[Fact]
public void Deserialize_AllRequests_CanBeDeserialized()
{
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