prompts.chat: the world's largest open-source prompt library for AI chat models

What it solves

It provides a centralized, open-source library of high-quality prompts for AI chat models (such as ChatGPT, Claude, Gemini, and Llama), helping users get better results from AI assistants by providing proven prompt templates.

How it works

The project maintains a curated collection of prompts available in multiple formats (CSV, Markdown, and a Hugging Face dataset). It offers a web interface for browsing, a CLI tool, and an MCP server for integration into other AI tools. Users can contribute new prompts via a web portal that syncs automatically with the repository.

Who it’s for

Anyone using AI chat models who wants to improve their prompting skills or find ready-made prompts for specific roles or tasks, as well as developers who want to self-host a private prompt library with custom branding.

Highlights

• Extensive Library: The world's largest open-source prompt library.
• Self-Hosting: Ability to deploy a private, branded prompt library with authentication (GitHub, Google, Azure AD).
• Integrations: Includes a CLI, a Claude Code plugin, and an MCP server for seamless AI tool integration.
• Educational Resources: Includes a free interactive book on prompt engineering and a game-based adventure for children to learn AI communication.
• Broad Compatibility: Works across all modern AI assistants.