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Open-source skill repos

Find the public repos shaping how AI agents work.

Browse curated GitHub repos builders can install, study, adapt, compare, or integrate into real agent workflows. Each card points to the source and the trust checks to run before use.

Featured starting points

Start with repos that map cleanly to builder workflows

These are not generic AI links. Each one gives builders a concrete workflow, skill format, context pattern, or integration path to study.

Category guides

Browse by agent builder problem

Use these static guides when you want a focused comparison set instead of the full inventory.

Curated comparisons

Choose between common agent repo options

These short guides compare practical first moves without pretending to rank every project in the ecosystem.

Curated repo inventory

Filter by the job you need the repo to do

Use category and intent filters to find install candidates, study references, adaptation patterns, comparison sets, and integrations.

Agent skill stack

GStack

Shared by Garry Tan · garrytan/gstack

109k

Role-based CEO, design, engineering, release, docs, and QA workflows for agentic coding.

Best next step: Adapt carefully. Review the source, then try one low-risk workflow before making it default.
Agent skill stackadaptTypeScript
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Engineering skills

Agent Skills

Shared by Addy Osmani · addyosmani/agent-skills

51.2k

Production engineering skills for AI coding agents from Addy Osmani.

Best next step: Install candidate. Review the source, then try one low-risk workflow before making it default.
Engineering skillsinstallShell
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Marketing skills

Marketing Skills

Shared by Corey Haines · coreyhaines31/marketingskills

32.8k

Marketing skills for Claude Code and AI agents across CRO, copywriting, SEO, analytics, and growth engineering.

Best next step: Install candidate. Review the source, then try one low-risk workflow before making it default.
Marketing skillsinstallJavaScript
Open profile

Claude Code directory

Awesome Claude Code

Shared by hesreallyhim · hesreallyhim/awesome-claude-code

46.1k

A curated list of Claude Code skills, hooks, slash commands, orchestrators, apps, and plugins.

Best next step: Study first. Review the source, then try one low-risk workflow before making it default.
Claude Code directorystudyPython
Open profile

Design context

Awesome DESIGN.md

Shared by VoltAgent · VoltAgent/awesome-design-md

89.0k

A collection of DESIGN.md files that teach coding agents how popular design systems behave.

Best next step: Study first. Review the source, then try one low-risk workflow before making it default.
Design contextstudyMarkdown
Open profile

Cursor rules

Awesome CursorRules

Shared by PatrickJS · PatrickJS/awesome-cursorrules

39.9k

A collection of Cursor rule files that shape AI editor behavior across frameworks and workflows.

Best next step: Adapt carefully. Review the source, then try one low-risk workflow before making it default.
Cursor rulesadaptJavaScript
Open profile

Prompt library

Prompt Engineering Guide

Shared by dair-ai · dair-ai/Prompt-Engineering-Guide

75.5k

Guides, papers, lessons, notebooks, and resources for prompt engineering, context engineering, RAG, and agents.

Best next step: Study first. Review the source, then try one low-risk workflow before making it default.
Prompt librarystudyMDX
Open profile

Prompt library

Prompts.chat

Shared by f · f/prompts.chat

164k

A large open-source prompt collection formerly known as Awesome ChatGPT Prompts.

Best next step: Study first. Review the source, then try one low-risk workflow before making it default.
Prompt librarystudyHTML
Open profile

MCP directory

Awesome MCP Servers

Shared by punkpeye · punkpeye/awesome-mcp-servers

88.8k

A curated directory of MCP servers that add tools and data sources to AI agents.

Best next step: Integration. Review the source, then try one low-risk workflow before making it default.
MCP directoryintegrateMarkdown
Open profile

MCP server

GitHub MCP Server

Shared by GitHub · github/github-mcp-server

30.6k

GitHub MCP server for giving agents structured access to GitHub workflows.

Best next step: Integration. Review the source, then try one low-risk workflow before making it default.
MCP serverintegrateGo
Open profile

Coding agent

OpenAI Codex CLI

Shared by openai · openai/codex

46.6k

Open-source coding agent CLI for terminal-based software work.

Best next step: Install candidate. Review the source, then try one low-risk workflow before making it default.
Coding agentinstallRust
Open profile

Coding agent

Claude Code

Shared by anthropics · anthropics/claude-code

34.2k

Public Claude Code repo and docs for studying agentic coding workflows.

Best next step: Study first. Review the source, then try one low-risk workflow before making it default.
Coding agentstudyTypeScript
Open profile

Coding agent

OpenCode

Shared by sst · sst/opencode

28.6k

Terminal-first AI coding agent with provider flexibility and project workflows.

Best next step: Install candidate. Review the source, then try one low-risk workflow before making it default.
Coding agentinstallTypeScript
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Coding agent

Aider

Shared by Aider-AI · Aider-AI/aider

37.9k

AI pair programming in the terminal with Git-aware code edits.

Best next step: Install candidate. Review the source, then try one low-risk workflow before making it default.
Coding agentinstallPython
Open profile

Coding agent

Continue

Shared by continuedev · continuedev/continue

28.2k

Open-source autopilot for VS Code and JetBrains with local and hosted models.

Best next step: Install candidate. Review the source, then try one low-risk workflow before making it default.
Coding agentinstallTypeScript
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Agent framework

AutoGen

Shared by microsoft · microsoft/autogen

50.2k

Framework for building conversational, tool-using, and multi-agent applications.

Best next step: Study first. Review the source, then try one low-risk workflow before making it default.
Agent frameworkstudyPython
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Agent framework

CrewAI

Shared by crewAIInc · crewAIInc/crewAI

41.2k

Framework for orchestrating role-based autonomous AI agents.

Best next step: Adapt carefully. Review the source, then try one low-risk workflow before making it default.
Agent frameworkadaptPython
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Agent framework

LangChain

Shared by langchain-ai · langchain-ai/langchain

118k

Framework for building applications with LLMs, tools, retrieval, and agents.

Best next step: Integration. Review the source, then try one low-risk workflow before making it default.
Agent frameworkintegratePython
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Agent framework

LangGraph

Shared by langchain-ai · langchain-ai/langgraph

19.2k

Graph-based framework for controllable, stateful agent workflows.

Best next step: Integration. Review the source, then try one low-risk workflow before making it default.
Agent frameworkintegratePython
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RAG and documents

LlamaIndex

Shared by run-llama · run-llama/llama_index

42.8k

Data framework for connecting private documents and tools to LLM applications.

Best next step: Integration. Review the source, then try one low-risk workflow before making it default.
RAG and documentsintegratePython
Open profile

Workflow builder

Dify

Shared by langgenius · langgenius/dify

85.6k

Open-source platform for building agentic workflows, RAG apps, and model operations.

Best next step: Install candidate. Review the source, then try one low-risk workflow before making it default.
Workflow builderinstallTypeScript
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Workflow builder

Flowise

Shared by FlowiseAI · FlowiseAI/Flowise

38.2k

Drag-and-drop builder for LLM flows, tools, retrieval, and agent chains.

Best next step: Install candidate. Review the source, then try one low-risk workflow before making it default.
Workflow builderinstallTypeScript
Open profile

Workflow builder

n8n

Shared by n8n-io · n8n-io/n8n

63.6k

Workflow automation platform that can connect agent steps to business systems.

Best next step: Integration. Review the source, then try one low-risk workflow before making it default.
Workflow builderintegrateTypeScript
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Workflow builder

Langflow

Shared by langflow-ai · langflow-ai/langflow

104k

Visual framework for building and testing agent and RAG workflows.

Best next step: Install candidate. Review the source, then try one low-risk workflow before making it default.
Workflow builderinstallPython
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Memory and context

Mem0

Shared by mem0ai · mem0ai/mem0

39.2k

Memory layer for AI agents that need persistent user and task context.

Best next step: Integration. Review the source, then try one low-risk workflow before making it default.
Memory and contextintegratePython
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Memory and context

Zep

Shared by getzep · getzep/zep

6.8k

Long-term memory service for assistants with user, session, and facts context.

Best next step: Integration. Review the source, then try one low-risk workflow before making it default.
Memory and contextintegrateGo
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Memory and context

Letta

Shared by letta-ai · letta-ai/letta

17.1k

Framework for stateful agents with memory, tools, and long-running behavior.

Best next step: Study first. Review the source, then try one low-risk workflow before making it default.
Memory and contextstudyPython
Open profile

Memory and context

MCP Memory Service

Shared by doobidoo · doobidoo/mcp-memory-service

2.9k

MCP server that gives compatible agents semantic memory capabilities.

Best next step: Integration. Review the source, then try one low-risk workflow before making it default.
Memory and contextintegratePython
Open profile

RAG and documents

Open WebUI

Shared by open-webui · open-webui/open-webui

111k

Self-hosted AI interface with document workflows, tools, and local model support.

Best next step: Install candidate. Review the source, then try one low-risk workflow before making it default.
RAG and documentsinstallSvelte
Open profile

RAG and documents

AnythingLLM

Shared by Mintplex-Labs · Mintplex-Labs/anything-llm

54.8k

Desktop and server workspace for private documents, agents, and retrieval.

Best next step: Install candidate. Review the source, then try one low-risk workflow before making it default.
RAG and documentsinstallJavaScript
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RAG and documents

PrivateGPT

Shared by zylon-ai · zylon-ai/private-gpt

55.6k

Reference implementation for private document ingestion and question answering.

Best next step: Study first. Review the source, then try one low-risk workflow before making it default.
RAG and documentsstudyPython
Open profile

RAG and documents

RAGFlow

Shared by infiniflow · infiniflow/ragflow

64.2k

RAG engine focused on document understanding, parsing, and knowledge workflows.

Best next step: Install candidate. Review the source, then try one low-risk workflow before making it default.
RAG and documentsinstallPython
Open profile

Observability and evals

Langfuse

Shared by langfuse · langfuse/langfuse

15.8k

Open-source tracing, prompt management, and evaluation for LLM applications.

Best next step: Integration. Review the source, then try one low-risk workflow before making it default.
Observability and evalsintegrateTypeScript
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Observability and evals

Phoenix

Shared by Arize-ai · Arize-ai/phoenix

6.1k

Open-source observability and eval tooling for LLM, RAG, and agent systems.

Best next step: Integration. Review the source, then try one low-risk workflow before making it default.
Observability and evalsintegratePython
Open profile

Observability and evals

Promptfoo

Shared by promptfoo · promptfoo/promptfoo

9.3k

CLI and framework for testing prompts, models, and agent behaviors.

Best next step: Install candidate. Review the source, then try one low-risk workflow before making it default.
Observability and evalsinstallTypeScript
Open profile

Observability and evals

DeepEval

Shared by confident-ai · confident-ai/deepeval

8.2k

Evaluation framework for testing LLM outputs, RAG quality, and agent behavior.

Best next step: Install candidate. Review the source, then try one low-risk workflow before making it default.
Observability and evalsinstallPython
Open profile

Browser automation

Playwright MCP

Shared by microsoft · microsoft/playwright-mcp

20.9k

MCP server that gives agents structured browser automation through Playwright.

Best next step: Integration. Review the source, then try one low-risk workflow before making it default.
Browser automationintegrateTypeScript
Open profile

Browser automation

Browser Use

Shared by browser-use · browser-use/browser-use

74.1k

Toolkit for connecting AI agents to browser actions and web tasks.

Best next step: Install candidate. Review the source, then try one low-risk workflow before making it default.
Browser automationinstallPython
Open profile

Browser automation

Skyvern

Shared by Skyvern-AI · Skyvern-AI/skyvern

13.7k

AI browser automation for repetitive web workflows and form-heavy tasks.

Best next step: Study first. Review the source, then try one low-risk workflow before making it default.
Browser automationstudyPython
Open profile

Code graph and context

Gitingest

Shared by cyclotruc · cyclotruc/gitingest

11.2k

Turn GitHub repositories into digestible text context for LLMs and agents.

Best next step: Install candidate. Review the source, then try one low-risk workflow before making it default.
Code graph and contextinstallPython
Open profile

Code graph and context

Repomix

Shared by yamadashy · yamadashy/repomix

16.2k

Pack repository contents into agent-friendly files for analysis and coding tasks.

Best next step: Install candidate. Review the source, then try one low-risk workflow before making it default.
Code graph and contextinstallTypeScript
Open profile

Code graph and context

Serena

Shared by oraios · oraios/serena

12.2k

Coding agent toolkit that uses language-server based semantic code understanding.

Best next step: Integration. Review the source, then try one low-risk workflow before making it default.
Code graph and contextintegratePython
Open profile

Learning resource

Aider Benchmarks

Shared by Aider-AI · Aider-AI/aider-chat-benchmark

7.1k

Benchmarks and reports useful for comparing coding agent model performance.

Best next step: Compare. Review the source, then try one low-risk workflow before making it default.
Learning resourcecomparePython
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Learning resource

Awesome Generative AI

Shared by steven2358 · steven2358/awesome-generative-ai

8.9k

Curated resources for generative AI tools, agents, courses, and references.

Best next step: Study first. Review the source, then try one low-risk workflow before making it default.
Learning resourcestudyMarkdown
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Learning resource

AI Engineering Hub

Shared by patchy631 · patchy631/ai-engineering-hub

18.0k

Hands-on examples for RAG, agents, LLM apps, and production AI engineering.

Best next step: Study first. Review the source, then try one low-risk workflow before making it default.
Learning resourcestudyJupyter Notebook
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Trust check

Treat every public agent workflow as source to review, not magic to trust.

Before installing or integrating, check the license, maintainer activity, permission scope, hidden network calls, credential handling, and whether the workflow was tested on a task like yours.

Build in public with us

Have an AI agent skill, MCP server, or workflow repo worth studying?

Submit it for review. Strong fits can be added to the directory, highlighted on BuildLeanSaaS X, and included in future blog roundups for builders comparing real agent workflows.

Submit yours for X highlight

Builder learning path

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BuildLeanSaaS teaches builders how to evaluate public examples, design safer workflows, and ship agent-backed product systems with review loops.

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Open Source AI Skills and Agent Workflow Repos | Build Lean SaaS