Skip the protocol theory. Build a working Model Context Protocol server in TypeScript, wire it into Claude Code, and make a real agent call a real tool in under an hour. Code, traps, and how to know it works.
Model Context Protocol turns your internal services into something an agent can call without bespoke glue. What MCP actually is, what it costs to expose one well, and the patterns that hold up when the caller is an LLM instead of a UI.