Best Open Source prompt engineering Libraries
A curated list of the most popular GitHub repositories tagged with prompt engineering. Select any project to visualize its architecture and dive into the codebase using RepoMind's AI engine.
#1f/prompts.chat
f.k.a. Awesome ChatGPT Prompts. Share, discover, and collect prompts from the community. Free and open source — self-host for your organization with complete privacy.
#2microsoft/generative-ai-for-beginners
21 Lessons, Get Started Building with Generative AI
#3JuliusBrussee/caveman
🪨 why use many token when few token do trick — Claude Code skill that cuts 65% of tokens by talking like caveman
#4dair-ai/Prompt-Engineering-Guide
🐙 Guides, papers, lessons, notebooks and resources for prompt engineering, context engineering, RAG, and AI Agents.
#5asgeirtj/system_prompts_leaks
Collection of extracted System Prompts from popular chatbots like ChatGPT, Claude & Gemini
#6langfuse/langfuse
🪢 Open source AI engineering platform: LLM evals, observability, metrics, prompt management, playground, datasets. Integrates with OpenTelemetry, LangChain, OpenAI SDK, LiteLLM, and more. 🍊YC W23
#7github/awesome-copilot
Community-contributed instructions, agents, skills, and configurations to help you make the most of GitHub Copilot.
#8sickn33/antigravity-awesome-skills
The Ultimate Collection of 1000+ Agentic Skills for Claude Code/Antigravity/Cursor. Battle-tested, high-performance skills for AI agents including official skills from Anthropic and Vercel.
#9linshenkx/prompt-optimizer
一款提示词优化器，助力于编写高质量的提示词
#10mlflow/mlflow
The open source AI engineering platform for agents, LLMs, and ML models. MLflow enables teams of all sizes to debug, evaluate, monitor, and optimize production-quality AI applications while controlling costs and managing access to models and data.
#11AI4Finance-Foundation/FinGPT
FinGPT: Open-Source Financial Large Language Models! Revolutionize 🔥 We release the trained model on HuggingFace.
#12humanlayer/12-factor-agents
What are the principles we can use to build LLM-powered software that is actually good enough to put in the hands of production customers?
#13comet-ml/opik
Debug, evaluate, and monitor your LLM applications, RAG systems, and agentic workflows with comprehensive tracing, automated evaluations, and production-ready dashboards.
#14promptfoo/promptfoo
Test your prompts, agents, and RAGs. Red teaming/pentesting/vulnerability scanning for AI. Compare performance of GPT, Claude, Gemini, Llama, and more. Simple declarative configs with command line and CI/CD integration.
#15ZeroLu/awesome-nanobanana-pro
🚀 An awesome list of curated Nano Banana pro prompts and examples. Your go-to resource for mastering prompt engineering and exploring the creative potential of the Nano banana pro(Nano banana 2) AI image model.
#16YouMind-OpenLab/awesome-nano-banana-pro-prompts
🍌 World's largest Nano Banana Pro prompt library — 10,000+ curated prompts with preview images, 16 languages. Google Gemini AI image generation. Free & open source.
#17Arize-ai/phoenix
AI Observability & Evaluation
#18jnMetaCode/superpowers-zh
🦸 AI 编程超能力 · 中文增强版 — superpowers（116k+ ⭐）完整汉化 + 6 个中国原创 skills，让 Claude Code / Copilot CLI / Hermes Agent / Cursor / Windsurf / Kiro / Gemini CLI 等 16 款 AI 编程工具真正会干活
#19mufeedvh/code2prompt
A CLI tool to convert your codebase into a single LLM prompt with source tree, prompt templating, and token counting.
#20FellouAI/eko
Eko (Eko Keeps Operating) - Build Production-ready Agentic Workflow with Natural Language - eko.fellou.ai
#21microsoft/apm
Agent Package Manager
#22langwatch/langwatch
The platform for LLM evaluations and AI agent testing
#23feichanggege/ecommerce-visual-copywriting-skill
电商视觉文案设计SOP Skill - 让电商设计小白也能一键做出5年资深设计经验的商品图片.兼容 Claude / Codex / Cursor / Workbuddy 等 SKILL.md Agent. AI-powered e-commerce visual strategy skill for main images, PDP/A+, copywriting, localization, evidence-aware compliance and image prompts.
#24VigoZhao/AI-Visual-Prompt-Cookbook
118+ plug-and-play JSON style packs for Nano Banana Pro, GPT Image & Midjourney. Copy one JSON, get a style. Updated daily.
#25seaworld008/Commonly-used-high-value-skills
High-value AI skills repository for Codex, Claude Code, OpenClaw, agents, prompts, and automation workflows. 高价值的 AI 技能库，涵盖 Codex、Claude Code、OpenClaw、代理、提示和自动化工作流程。
#26mindaxis-ai/alchemy-furnace
A desktop workspace for crafting vivid AI personas and exploring what emerges when different personalities fuse.