Python: [Feature Request] Allow passing existing chat history or a runtime context for multi-turn orchestration

[hjerbii]

Hello!

Currently, the Magentic orchestration in the Agent Framework (MagenticBuilder / workflow.run*) only accepts a single string task input and internally manages its own MagenticContext.
There is no supported way to initialize or inject an existing chat history (e.g., a list of ChatMessageContent objects) into a new workflow run.

This limitation makes it impossible to:

• Replay or re-run a workflow using an existing conversation.
• Start a Magentic orchestration with prior user–assistant context (multi-turn setup).
• Integrate Magentic into existing conversational agents or chat interfaces that already maintain message history.

Checkpoints are not a solution here (please correct me if I am wrong), as they only allow resuming from saved states within a previous interrupted run, not injecting prior dialogue into a new orchestration.

I am aware that in Semantic Kernel passing a chat history was not supported as well, but is it possible to implement this feature?

Thanks in advance!

[APiccardo4Quantis]

i was looking forward same features,
i want my magentic for multipleturns, in a user/thread-like style .