.NET: [Bug]: serialization related bugs/inconsistency in implementation or documentation

[dsslight]

Description

For the Declarative workflow documentation

Objects sent to workflow are converted to ChatMessage instances by using ToString(), which requires a workaround - serialization in toString() method as implementation.
The declarative workflow documentation says custom serializers are supported, but making them work requires a lot of experimentation and is deprioritized in my use case by problem #7977
(that tool calls do not work as expected, so no major need for that as I can handle it in the code).
So would be great to have proper and tested samples how to turn serialization on smoothly and reliably.

Code Sample

Error Messages / Stack Traces

Package Versions

Microsoft.Agents.AI.Workflows.Declarative

.NET Version

.NET 10.0.300

Additional Context

documentation related issue

[UniversePeak]

I checked the C# implementation and the declarative workflow guidance. For non-ChatMessage inputs, DeclarativeWorkflowBuilder currently uses ToString() unless callers provide the documented inputTransform, while the serializer example is only shown for checkpoint state. I’d like to add a tested, copyable C# example showing a custom JsonSerializerContext and inputTransform, and clarify that checkpoint serializer registration does not automatically transform the initial workflow input.

[baywet]

Hi dsslight
Thank you for using the SDK and for reaching out.

Hi 宇宙的山峰 (@UniversePeak) thanks for putting a pull request together, we'll get this merged as soon as possible to get things in order.

Let me know if you have any additional comments or questions.