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.

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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.

Agent skill stack

GStack

★ 109k

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

Adapt carefullyView profile

Engineering skills

Agent Skills

★ 51.2k

Production engineering skills for AI coding agents from Addy Osmani.

Install candidateView profile

MCP server

GitHub MCP Server

★ 30.6k

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

IntegrationView profile

Category guides

Browse by agent builder problem

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

Claude Code directory

Claude Code skills and workflows

Skill packs, directories, and workflow examples for builders shaping Claude Code into a more reliable teammate.

Open guide

MCP server

MCP servers for AI agents

Model Context Protocol servers and directories that connect agents to tools, repos, memory, browsers, and business systems.

Open guide

Prompt library

Prompt libraries for agent builders

Prompt references and teaching repos that help builders turn loose instructions into stricter agent workflows.

Open guide

Coding agent

AI coding agents and harnesses

Open-source coding agents, CLIs, editor assistants, and harnesses for hands-on software work.

Open guide

Memory and context

Memory and context tools for AI agents

Memory layers, semantic stores, and repo context tools that help agents remember useful facts without overreaching.

Open guide

Design context

Design context for AI-generated UI

Design context, rules, and examples that give coding agents stronger taste and UI constraints.

Open guide

Marketing skills

Marketing and operator skills for AI agents

Domain skills for copy, CRO, analytics, SEO, positioning, and operator workflows supported by human review.

Open guide

Curated comparisons

Choose between common agent repo options

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

GStack vs Agent Skills

Choose between a broad operator skill stack and a focused engineering skill pack for coding agents.

Open comparison

Codex vs Claude Code vs OpenCode

Compare coding agent CLIs and workflows by review control, provider needs, and sandbox habits.

Open comparison

Best MCP servers for AI agents to evaluate first

A restrained shortlist of MCP directories and servers worth comparing before connecting agents to tools.

Open comparison

Prompt libraries vs agent skills

Decide when a public prompt is enough and when to turn the idea into a versioned agent skill.

Open comparison

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.

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

Open profile

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

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

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

Open profile

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

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

Open profile

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

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

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

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

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

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

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

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

Want help turning these repo ideas into working agent systems?

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

Explore the skills marketplace