What problem does it solve? When a design direction is unclear, refining a single mockup sequentially is slow and narrows exploration too early. This Skill takes one seed HTML file and produces multiple variants along a concrete constraint axis, so teams can compare directions side-by-side and pick one quickly. ## Core Features & Use Cases - Parallel variant generation: Mutates a seed HTML file into 2-8 variants along a chosen axis such as palette, layout, density, motion-language, or type-system. - Side-by-side comparison index: Assembles an index.html with labeled iframes (or screenshot fallbacks) so reviewers can compare all variants in one view. - Failure recovery: Persists completed variants when a worker crashes and supports re-running only the failed axis rule with --only. - Use Case: A team has a dashboard seed mockup but cannot agree on a color direction. Run the skill with --axis palette --count 4 to get cool-mono, warm-mono, cool-accent, and warm-accent variants in one comparison page for the design review. ## Quick Start Ask the agent to run design-shotgun on your seed HTML file with a count of 4 and the palette axis to produce a side-by-side comparison page.