Core principle. Build 2-3 competing prototypes and compare side by side before committing.
Applies when facing a novel UI interaction or architectural decision with no precedent in the codebase. pstack-arena is this principle made concrete, and pstack-architect Phase B enforces it as a hard floor: at least two structurally distinct candidates before synthesis, even when the first looks sufficient.
See Also
- pstack-poteto-mode — indexes this principle inline and reads the index at task start.
- pstack — the twenty-three-principle set this belongs to.