If you want to go beyond the chat window - see real code, contribute, or just poke around - these are the most-starred, most-useful repositories in the Claude ecosystem right now. A couple require some coding comfort; most don't.
Official anthropics/claude-code
Anthropic's own agentic coding tool that lives in your terminal - it reads your codebase, writes and edits code, and handles git workflows through plain-English commands. The most popular Claude-related repo on GitHub by a wide margin.
View on GitHub →Official modelcontextprotocol/servers
Reference implementations for MCP - the open standard that lets Claude securely connect to files, tools, and outside services. This is the best starting point if you want to understand how Claude "plugs in" to other software.
View on GitHub →Official anthropics/claude-cookbooks
Copy-paste-able notebooks showing how to build real things with the Claude API - classification, summarization, vision, tool use, PDF handling, and more. Aimed at developers, but the READMEs are a good plain-English tour of what's possible.
View on GitHub →Community hesreallyhim/awesome-claude-code
A community-curated list of skills, hooks, slash-commands, and plugins that extend Claude Code. Useful for browsing what other people have already built before you build it yourself.
View on GitHub →Official anthropics/courses
Anthropic's own free, self-paced courses on API fundamentals, prompt engineering, evaluations, and tool use. Written for developers, but the early lessons are approachable even if you've never called an API before.
View on GitHub →Official anthropics/anthropic-sdk-python
The official Python client library for the Claude API - the actual code most Python developers install to talk to Claude programmatically. Squarely for developers, but it's the foundation almost every other tool on this page sits on.
View on GitHub →Everything above is written for people comfortable poking around GitHub. If that's not you yet, our own guides start from zero jargon.