Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

The official mistral-vibe CLI uses the x-affinity header to track and continue sessions. This seems to be similar to promptCaching in the OpenAI provider for example.
The session_id passed to x-affinity is a UUID4, the session id used or promptCaching in OpenCode is a based on a timestamp, so maybe it's not compatible out of the box, but worth a try.

Here is some evidence:
https://github.com/mistralai/mistral-vibe/blob/9809cfc8315049b6f02b1865306903d92428919f/vibe/core/agent_loop.py#L587
https://github.com/mistralai/mistral-vibe/blob/9809cfc8315049b6f02b1865306903d92428919f/vibe/core/agent_loop.py#L156
https://github.com/mistralai/mistral-vibe/blob/9809cfc8315049b6f02b1865306903d92428919f/vibe/cli/textual_ui/app.py#L1242