Spin up multiple website or page variants in parallel — each in its own git worktree or sibling folder, built by a sub-agent from the same brief and shared design tokens but a different inspiration source — then cherry-pick and merge the best sections into one final. Captures side-by-side comparison screenshots when Playwright is connected; otherwise renders a structured comparison summary. Trigger when the user says "parallel build", "build three versions", "spin up variants", "make 3 sites at once", "side-by-side build", or "different design flavors to compare".
