RubyLLM 2.2: The AI Framework for Coding Agents

“You don’t need frameworks anymore.” “Just let the agent write it. It’s one prompt away. Why would you depend on somebody’s gem?” How many of you heard this this year? Yeah. And it’s spreading. My friend Andrzej Krzywda goes to every conference and talks to everybody, and a few weeks ago he wrote that 40% of devs try to reinvent RubyLLM. Forty percent! That’s one person’s impression. But the idea is in the air. You can feel it. So here’s what I think about that, dear Ruby developers. Bullshit. Frameworks matter. And I won’t just say it. I tested it. Same Agent. Same App. I took a coding agent, Codex on GPT-6 Astra, a really good one. And I gave it the same app to build four times. With RubyLLM on Rails. With LangChain. With the Vercel AI SDK. And with no framework at all, plain Ruby, “just let the agent write it”. A real chat app. Streaming, conversations, cancel, cost. A second provider you can switch to in the middle of a conversation. Fallbacks. Surviving a restart. Approvals.…

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