Most system prompts fail for one of three reasons: the role is too vague, the output format is undefined, or the constraints contradict each other. This automation grades your system prompt on all three — and tells you the single most important thing to fix first.\n\nNo essays. No 10-point lists. One score. One fix. One thing to keep.\n\nBuilt for: Claude Code builders, AI product developers, anyone who writes system prompts and wonders why outputs are inconsistent.