--- name: principle-exhaust-the-design-space description: Apply when facing a novel UI interaction or architectural decision with no precedent in the codebase. Build 2-3 competing prototypes and compare side by side before committing. --- Host integration: first read [HOSTS.md](../../pstack-resources/HOSTS.md); it maps the upstream workflow to the current agent host. # Exhaust the Design Space It also applies to product design decisions where user experience depends on feel, not logic.