Some agents do not deserialize model_context (set to None or Do not serialize too) #6336
Description
What happened?
Describe the bug
Some agent classes, including AssistantAgent and SocietyOfMindAgent and CodeExecutorAgent fail to properly deserialize the model_context field when reconstructing from their declarative config. Even though the model_context is correctly serialized via dump_component(), it is explicitly set to None during deserialization.
This leads to the silent loss of critical context configuration, especially when using model-specific conditional transformers or inference-time metadata handlers.
To Reproduce
# at AssistantAgent
# to_config: correct serialization
model_context=self._model_context.dump_component(),
# from_config: incorrect deserialization
model_context=None, # <-- should be ChatCompletionContext.load_component(config.model_context)Same omission is present in SocietyOfMindAgent, where model_context is neither serialized nor deserialized.
Expected behavior
Agent reconstruction via from_config() should faithfully restore all components, including model_context, to support complete behavioral parity with the original instance.
Additional context
🧩 Affected classes:
- AssistantAgent: model_context is serialized but not deserialized.
- SocietyOfMindAgent: model_context is completely ignored (neither serialized nor deserialized).
- CodeExecutorAgent: model_context is completely ignored (neither serialized nor deserialized).
🧪 Missing test coverage:
- Round-trip serialization/deserialization test for agents with non-null model_context
- Negative test for unsupported ChatCompletionContext types
Which packages was the bug in?
Python AgentChat (autogen-agentchat>=0.4.0)
AutoGen library version.
Python dev (main branch)
Other library version.
No response
Model used
No response
Model provider
None
Other model provider
No response
Python version
None
.NET version
None
Operating system
None