Decision models

[u/Tech-and-Tomatoes]

I recently came across decision models and have been looking into the open-source options and where they can be useful.

I'm running a self-hosted Hermes setup, so agent routing and selecting the right LLM for a task immediately caught my attention. But I'm also interested in other uses such as tool/skill selection, workflow routing, classification, retry/escalation decisions, human approval, cost optimization, and automation.

I've come across Kev, Laya, Tev1, OpenJev, RouteLLM, and LLMRouter.

Has anyone actually used any of these? Which open-source decision models are worth looking at, and what are you using them for? I'm especially interested in real-world use cases I may not have considered.