version: "1.0.1" 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." user-invocable: false

Exhaust the Design Space

The rule. When the right answer is not obvious, build 2-3 competing prototypes or sketches. Compare them side by side. Only then commit. Building the wrong thing costs more than exploring three options; a second flavor of the first shape does not count.

When it applies:

• Novel UI interactions (no prior art in the codebase)
• Architectural choices with multiple viable approaches
• Product design decisions where user experience depends on feel, not logic

When it doesn't:

• Mechanical implementation where the pattern is established
• Bug fixes or refactors with a clear target state
• Changes where constraints dictate a single viable approach