Curated open-source repositories and skill ecosystems for Claude Code and other compatible coding agents — reusable instruction packs that extend what your agent can do. Pick a category or search across the whole library.
66 repositories · 10 categories
HONEST NOTE: These are community open-source projects — entries marked Official are published by Anthropic, everything else is third-party. Star counts are a static snapshot supplied with this curation, not live GitHub data; we make no GitHub API calls.
Agent harnesses that plan, guard and structure the coding loop.
Plans and debugs before coding
Harness with skills, memory, security and research-first workflows
Karpathy-inspired coding-agent guardrails
Product, design, engineering, release and QA toolkit
Encourages minimal, simple code
Small educational Claude Code-style harness
Skill collections, marketplaces and plugin directories.
Anthropic’s official public Agent Skills library
Specialist agents for engineering, design and marketing
Curated Claude Skills and resources
Skills, agents, plugins and Claude Code tools
Catalog and control system for 2,000+ Agent Skills
Marketplace for agents, skills, commands and plugins
Official Anthropic Claude Code plugin directory
1,000+ skills for Claude Code, Codex, Cursor and Gemini
345 engineering, marketing, product, compliance and business skills
Engineering workflows, security practices and agent collaboration.
Production-tested engineering skills
Production-ready engineering skills for coding agents
Official Vercel skills for modern web development
817 security skills based on MITRE, NIST and more
Compound-engineering workflows for leading coding agents
Visual taste, presentations, media and front-end polish.
Professional palettes, typography and UI/UX rules
Creates prototypes, sites, dashboards, slides, images and video
Fights generic AI design and improves visual taste
Design system for better agent visual decisions
Agentic video system with 12 pipelines and 700+ skills
Creates native PowerPoint decks with charts and animation
Creates polished web presentations
Anti-slop design skill for coding agents
Images, infographics, diagrams, articles and publishing
HTML presentations, social covers and WebGL slides
HTML design skill for prototypes, decks and animation
Edits video with Claude Code and other agents
Web research, academic writing and source-grounded work.
Researches recent Reddit, X, YouTube, HN and web content
Academic research, writing, review and revision workflow
Removes common AI-writing patterns
Scientific writing and Nature-style visualizations
161 biology, medicine, chemistry and drug-discovery skills
Improves academic structure, expression and quality
Careers, marketing, product and financial workflows.
Searches jobs, evaluates roles and manages applications
CRO, copywriting, SEO, analytics and growth skills
Official financial-services skills
Applications, resume tailoring and interview preparation
100+ product, strategy, launch and growth skills
Personal knowledge, notes and focused ways of working.
Obsidian, Markdown, Bases and JSON Canvas skills
Extracts a person’s mental models as a skill
Creates a digital colleague from working style
Turns technical PDF books into reusable skills
Enforces short, structured, ADHD-friendly responses
Knowledge graphs and persistent context across sessions.
Turns code, docs and schemas into a knowledge graph
Stores sessions and restores relevant context
Indexes code as a synchronized local knowledge graph
Packs a repository into one LLM-friendly file
Persistent planning across restarts and context loss
Infrastructure around coding agents: routers, MCP, UIs.
Crawls and extracts structured website content
Manages Claude Code, Codex, OpenCode and other agents
Large MCP server directory
Distributes issues across coding agents
Routes tasks to different models
Browser control and web testing through MCP
Official GitHub MCP server
Kanban UI for running coding agents
Token budgets, model routing and transparent context use.
Collection of real system prompts and AI-tool internals
Cuts token use through extremely concise agent communication
Efficient Claude Code workflow practices
Uses Codex inside Claude Code for review and delegation
Shows context use, active tools, agents and progress