ActionCable and WebSockets in Rails — Real-Time for AI Builders

This is Part 14 of the Ruby for AI series. Last time we added Stimulus for lightweight JavaScript. Now we're going real-time with ActionCable and WebSockets. If you're building AI features, real-time is non-negotiable. Users expect streaming responses, live updates, and instant feedback. ActionCable gives you all of that with zero external dependencies. What Is ActionCable? ActionCable is Rails' built-in WebSocket framework. It wraps the WebSocket protocol into channels — think of t