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If I understand it correctly, tools and agents run() method works in a similar way to react hooks, correct?

Depending on execution order, tool is either called or a cached value returned. That way local state can be replayed, and that's why "no side effects" rule is in place.

I like it. Just, what's the recommended way to have a chat assistant agent with multiple tools? Message history would need to be passed to the very top-level agent.run call, isn't it?

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yes, similar and we've been toying around with some feedback to have a `pickaxe.memo(()=>{})` utility to quickly wrap small chunks of code similar to `useMemo`.

we'll be continuously improving docs on this project, but since pickaxe is built on hatchet it supports concurrency [1]. so for a chat usecase, you can pass the chat history to the top level agent but propagate cancelation for other message runs in the session to handle if the user sends a few messages in a row. we'll work an example in pattern section for this!

[1] https://docs.hatchet.run/home/concurrency#cancel-in-progress

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