anthropics / claude-plugins-official

Anthropic-managed marketplace directory of curated plugins for Claude Code, split into internal and external plugin folders.

rohitg00 / ai-engineering-from-scratch

A free, MIT-licensed course of 542 lessons on AI engineering, implementing model internals, retrieval, and agent runtimes from scratch.

wshobson / agents

A multi-harness collection of plugins, agents, skills, and commands for AI coding tools like Claude Code, Codex CLI, and Cursor.