The Complete Claude Code Power User Guide: Slash Commands, Hooks, Skills & More

Most people use Claude Code like a slightly smarter terminal autocomplete. They type a request, Claude generates code, they copy it somewhere. That's fine, but it's leaving most of the tool on the table. Claude Code has a full extensibility stack: slash commands, hooks, skills, subagents, MCP servers, and plugins. Each one solves a different problem. Understanding which to reach for, and when, is what separates reactive usage from actually building a system. CLAUDE.md: The One File That Changes Everything Before touching any of the advanced features, get your CLAUDE.md right.