Agent: Claude Code, GitHub CopilotLLM: Claude 3.5, GPT-5.5#prompt-engineering#system-prompts#ai-models#documentation#open-source
A comprehensive, community-maintained repository documenting system prompts from major AI models including Claude, GPT-5.5, Gemini, and specialized tools like Claude Code and Copilot. Updated regularly with diffs tracking prompt changes across model versions. Essential resource for prompt engineers and AI developers understanding model behaviors.