[Sol-]

I think the ReAct paper also popularized this approach: https://arxiv.org/abs/2210.03629

[broast]

Perhaps these papers are also just coincidence. This field is so new and this type of reasoned completion chaining seems like it was an inevitability. I imagine many other active gpt products that got started early hand rolled similar systems.

[tholor]

Haystack's agent is indeed using the approach suggested in the ReAct paper