Is there any work towards GraalVM support at Temporal?
No, we only support CPython at this time
Do you see any way to make my use case work?
We have not investigated GraalPy, but they do have a guide here that may help. We use PyO3 so a good first step is to see how to get a PyO3 native extension to work with GraalPy. Pydantic Core also uses PyO3, and looking at this issue, it seems they do not natively support the extension, they had to maintain custom patches for it, so I wouldn’t be surprised if Temporal would have to be treated similarly.