From what I've seen, giving Claude a single detailed prompt with exact specs upfront works way better than iterating fix-by-fix — each "fix this" request tends to regress something else because it loses context on what was working. For visual stuff like grid layouts I usually describe the final state precisely (viewport dimensions, aspect ratios, z-index for controls layer, etc.) in one shot rather than letting it guess. Still early days but the prompting style matters way more than people expect.