Build Your Own JARVIS with Claude Code: A Command-Line AI Assistant

Tired of cumbersome MCP configurations? This post shows how to use Anthropic's Claude Code, a command-line tool, to seamlessly connect Claude Sonnet 4 with your apps. By writing a simple CLAUDE.md file, you can teach Claude to run Python scripts, call APIs, control your computer, and even automate your workflows, such as managing releases or debugging a customer's website. The author demonstrates how to use Claude Code to extract YouTube video transcripts, retrieve Things to-do lists, and fetch likes from X (Twitter). While the process may require some trial and error, Claude Code's flexibility and scalability make it a powerful tool for building personalized AI assistants.