Constraint Engine gives you one creative rule and a timer — and won’t let you overthink it. Pick your craft. Get your constraint. Make the thing. Works across 10 crafts — Music, Writing, Filmmaking, Art, Photography, Cooking, Game Dev + more. Free tier: unlimited constraints forever. Pro: AI constraints by Claude, 10 genres, AI Chaos Chain. Built by a music producer who got tired of staring at blank projects.