I'm using RubyLLM which is an incredible framework for building agents.
Hadn't heard of it! Site here: https://rubyllm.com/
This looks really nice. Snippet from site:
chat = Chat.create! model: "claude-sonnet-4"
chat.ask "What's in this file?", with: "report.pdf"
beautiful interface right? It is honestly so great working with such well thought out gem.