Most AI users re-explain themselves every session — same preferences, format rules, and context typed out again and again. Prompt Once, Reuse Forever is a 3-layer protocol to encode your context once and get sharper outputs with shorter prompts, forever. Includes: - Identity Layer template (set once, never retype) - 6 Task Blocks for coding, writing & research - 8 Preset Modes (ADHD, Code Reviewer, Analyst...) - Setup guides for ChatGPT, Claude, Gemini & Perplexity