1️⃣ OpenAI Cookbook: The Official Playground

github.com/openai/openai-cookbook

The go-to library for developers experimenting with GPT APIs, embeddings, and fine-tuning.
It’s packed with production-ready code from text classification to function calling examples.

Use It For:

• Building your own API workflows
• Understanding token limits & prompt optimisation
• Experimenting with fine-tuning templates

2️⃣ Awesome ChatGPT Prompts: The Community Goldmine

github.com/f/awesome-chatgpt-prompts

This repo is a global collection of the best prompts ever shared.
You’ll find everything from marketing copy to debugging assistants, a perfect place to study structure and tone.

Use It For:

• Reverse-engineering effective prompts
• Building your personal prompt library
• Discovering roles and contexts that get results

3️⃣ LangChain: The Bridge Between Prompts and Apps

github.com/langchain-ai/langchain

LangChain is what turns prompts into workflows.
It helps you connect LLMs with APIs, memory, and databases to build AI agents that actually do things.

Use It For:

• Creating chatbots, research agents, or AI assistants
• Experimenting with chains and tools
• Understanding how context memory works

4️⃣ Prompt-Engineering-Guide by DAIR.AI

github.com/dair-ai/Prompt-Engineering-Guide

An academic-quality guide covering prompt types, design patterns, and evaluations.
It goes beyond examples to explain why certain prompts work, perfect for those who want depth.

Use It For:

• Learning systematic prompt design
• Accessing real papers and benchmarks
• Staying aligned with industry best practices

5️⃣ Jaideep Parashar / AI Prompt Library: Applied AI in Action

github.com/jaideepparashar/AI-Prompt-Library

My own open-source collection of prompt frameworks used in ReThynk AI books and AI Lab projects.
It includes ready-to-use prompts for coding, business automation, Excel integration, and personal branding.

Use It For:

• Real-world AI automation examples
• Developer-ready prompt templates
• Studying how to document and version prompts like code

Final Thought

Don’t just collect prompts, study how they evolve into systems.

GitHub isn’t just a repository of code anymore; it’s a repository of intelligence.
If you bookmark these five today and study their structure, you’ll develop an intuition that no tutorial can teach.

Resources

ChatGPT Prompts for Coding: 630 Actionable Prompts for Debugging, Testing, Integration, and Deployment

Next Article:
“Building a Prompt Engineering Toolkit for Developers”: how to create your own custom toolkit for experiments, testing, and automation.