Best Open Source agent skills Libraries

#1anthropics/skills

Public repository for Agent Skills

#2nexu-io/open-design

🎨 The open-source Claude Design alternative. 🖥️ Local-first desktop app. 🖼️ Your coding agent becomes the design engine: prototypes, landing pages, dashboards, slides, images & video — real files, HTML/PDF/PPTX/MP4 export. 🤖 Claude Code / Codex / Cursor / Gemini / OpenCode / Qwen & 20+ CLIs via BYOK.

#3ComposioHQ/awesome-claude-skills

A curated list of awesome Claude Skills, resources, and tools for customizing Claude AI workflows

#4VoltAgent/awesome-openclaw-skills

The awesome collection of OpenClaw skills. 5,400+ skills filtered and categorized from the official OpenClaw Skills Registry.🦞

#5hesreallyhim/awesome-claude-code

A curated list of awesome skills, hooks, slash-commands, agent orchestrators, applications, and plugins for Claude Code by Anthropic

#6github/awesome-copilot

Community-contributed instructions, agents, skills, and configurations to help you make the most of GitHub Copilot.

#7OthmanAdi/planning-with-files

Claude Code skill implementing Manus-style persistent markdown planning — the workflow pattern behind the $2B acquisition.

#8K-Dense-AI/claude-scientific-skills

A set of ready to use Agent Skills for research, science, engineering, analysis, finance and writing.

#9alibaba/open-code-review

Open-source & free — Battle-tested at Alibaba's scale. Hybrid architecture code review tool: deterministic pipelines + LLM Agent, precise line-level comments, built-in fine-tuned ruleset (NPE, thread-safety, XSS, SQL injection), OpenAI & Anthropic compatible.

#10aden-hive/hive

Outcome driven agent development framework that evolves

#11JimLiu/baoyu-skills

#12ThinkInAIXYZ/deepchat

🐬DeepChat - A smart assistant that connects powerful AI to your personal world

#13JuneYaooo/nihaisha-nishi-tcm

倪海厦中医课程资料的 Agent Skill：支持课程检索、方证穴位辨析、学习笔记整理与板书截图证据索引。 | An Agent Skill for Ni Haisha TCM course study, formula-pattern lookup, acupoint reference, and screenshot evidence indexing.

#14amplifthq/opentag

Open-source @agent mentions for Slack and GitHub. OpenTag routes tagged requests to Codex, Claude Code, then returns results in thread.

#15ctxrs/ctx

Search the coding agent history already on your machine

#16mliu98/awesome-human-distillation

A curated catalog of human distillliation agent skills

#17MicrosoftDocs/Agent-Skills

Curated Agent Skills for Microsoft & Azure – giving AI coding assistants structured, real-time expertise from Microsoft Learn docs.

#18rshankras/claude-code-apple-skills

Claude Code skills for Apple platform development (iOS, macOS, iPadOS) — product validation, code generation, App Store optimization, and more

#19JSONbored/awesome-claude

HeyClaude is a curated registry and distribution surface for Claude and AI-workflow assets: agents, MCP servers, skills, commands, hooks, rules, guides, tools, jobs, Raycast feeds, static data exports, and an npm MCP package.

#20PramodDutta/qaskills

QA Skills Directory QA Skills is a curated directory of testing-specific skills for AI coding agents (Claude Code, Cursor, Copilot, etc.).

#21vouchdev/vouch

A git-native, review-gated knowledge base for AI agents: they propose writes, you approve them. Every claim cites a source, every change is a diff in your repo. MCP + CLI.

#22belialberu4-oss/exo-harness-ai-pipeline

Claude Code AI Pipeline 2026 – PEV Framework Harness Plugin for Developers

#23yschimke/compose-ai-tools

Helping the Agents Compose the Things

#24runxhq/runx

the governed runtime for agent skill workflows, off the leash but on the record