Prompt Library is a macOS application designed to help users manage their AI prompts efficiently. It allows users to save, tag, and organize prompts into collections, creating a centralized system for prompt management instead of having instructions scattered across different apps and documents.

The application enables users to build collections for different contexts such as marketing, product, engineering, support, and hiring. Users can tag prompts for better organization and search functionality. The system provides a global launcher shortcut (⌘⌥P) that works from anywhere on the Mac, allowing instant search and access to saved prompts.

Prompt Library operates through a simple workflow: users press ⌘⌥P to open the global launcher, type to search for prompts in real-time, and then insert the selected prompt directly into their current application with one click. Users can also copy prompts without inserting them or create new prompts quickly using keyboard shortcuts.

The primary benefit is eliminating the need to copy snippets from notes or rewrite instructions repeatedly. Users can maintain a single source of truth for their prompts, resulting in faster workflow and higher output quality by reusing proven prompts instead of starting from scratch each time.

The tool is designed for Mac users who work with AI tools like ChatGPT, Claude, and Gemini. It's completely offline with no accounts or cloud required, storing everything locally on the user's Mac. The application supports various prompt formats including raw text, markdown fenced blocks, and JSON.