[CuriouslyC]

The best agent framework is Pi (pi.dev). It is minimal and doesn't assume a use case, runs fine interactively or non-interactively, has an active community building with it and supports everything you need to build whatever kind of agent you want with plugins.

[hedgehog]

After trying a few I like NanoBot more than Pi. Also popular, pretty clean code, I found fewer bugs than I did in Pi.