Most prompts fail not because the AI is bad — but because the prompt is vague. StackBuilt Prompt Optimizer builds production-ready prompts in one workflow. Describe your task, pick your domain, get system instructions + quality score. No prompt engineering background needed. Two modes: • Generate: build a structured prompt from scratch • Evaluate: improve an existing prompt For solopreneurs and operators using ChatGPT, Claude, or Gemini who want reliable, reusable prompts. Free. No signup.