Diffyn

Diffyn was built to address a critical gap in the AI ecosystem - the lack of a dedicated platform for prompt engineering collaboration. While developers have GitHub for code and designers have Figma, prompt engineers had no specialized platform for version control, collaboration, and testing of system or user prompts. What's unique about Diffyn compared to alternatives: 1) GitHub-inspired collaboration model - Complete with repositories, version control, forking, pull requests, and diffs specifically designed for prompts. 2) Support for all major AI providers (OpenAI, Anthropic, Google Gemini) plus custom API endpoints 3) Comprehensive version control - Semantic versioning with word-level diff viewing tailored for prompt engineering 4) Real-time testing interface - Test prompts directly against multiple AI models and compare results. Most proud of: 1) The version resequencing system - Automatically maintains version relationships when versions are deleted or modified. 2) Universal AI client architecture - A flexible system that supports both established providers and custom endpoints. 3) GitHub-like diff viewer - Split view with word-level differences specifically designed for prompt comparison. 4) Diffyn represents a purpose-built platform that elevates prompt engineering from ad-hoc experimentation to a structured, collaborative discipline with proper tooling.