Language Server Protocol (LSP): the secret behind a great AI Coding Agents
Language Server Protocol (LSP) is the reason AI coding tools actually work.
You've probably stopped writing code yourself. Claude does the work. Cursor does the work. OpenCode does the work. But here's what most people don't understand: these tools aren't just "AI plus an editor."
There's a third component a Language Server that runs in the background, doing something the AI model can't (currently) do: it knows, with 100% certainty, if the code actually compiles.
The model guesses. The Language Server checks. Errors go back to AI. AI fixes. Repeat until clean.
That's the loop. That's LSP. And that's why these tools work.
In this stream, I break down:
• What Language Server Protocol (LSP) actually is
• How Cursor, OpenCode, and Claude Code use it
• The exact verification loop (AI + LSP feedback)
• Live demo with real JSON-RPC messages
• Building our own AI + LSP loop in ~100 lines