Install the belt CLI skill: Email Design Design high-converting marketing emails with AI-generated visuals via inference.sh CLI. Quick Start Requires inference.sh CLI ( ). Install instructions Email Width & Layout | Constraint | Value | Why | |-----------|-------|-----| | Max width | 600px | Gmail, Outlook rendering standard | | Mobile width | 320-414px | Responsive fallback | | Single column | Preferred | Better mobile rendering | | Two column | Use sparingly | Breaks on many clients | | Image width | 600px max, 300px for 2-col | Retina: provide 2x (1200px) | | Font size (body) | 14-16px | B…