How MCP works as standalone client/Server and with LLM

Hope this helps someone to understand: 1. How MCP works as standalone client and server 2. How MCP works with LLM (Claude to be exact, others should be the same) I made each commit atomic so you can review the code to see how it works. The chat cli demo commit actually mimics interacting with LLMs so you can play with it without having Anthropic API key.