Reintroduce Prefect durable execution #3156
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desertaxle
commented
Oct 13, 2025
Comment on lines
+146
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+152
| async def event_stream_handler( | ||
| ctx: RunContext[Deps], | ||
| stream: AsyncIterable[AgentStreamEvent], | ||
| ): | ||
| logfire.info(f'{ctx.run_step=}') | ||
| async for event in stream: | ||
| logfire.info('event', event=event) |
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The failure on main was caused by this function being wrapped with @task, which is the opposite of what we want to do. The inputs to event_stream_handler can't be serialized, so we wrap the event stream handler within PrefetAgent to manage this. I've also corrected an inaccuracy that was in the PrefectAgent docs regarding this.
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Reintroduces the changes in #3074 with a fix for the test that was faling on
main.