This is a solid MJML starter for anyone who needs to ship responsive HTML emails that actually render correctly in Outlook, Gmail, and mobile clients. It enforces strict validation, includes dark mode patterns, and walks you through the full workflow from gathering requirements to compiling minified HTML. The nine engineering rules are opinionated but practical, especially around Outlook's VML quirks and Gmail's 102KB clip limit. Framix built this with accessibility baked in (proper heading roles via mj-html-attributes, contrast requirements) and includes gotcha warnings for vertical-align bugs and whitespace stacking. You get both the editable MJML source and production-ready HTML every time. Good for transactional templates, newsletters, or any email work where cross-client compatibility isn't optional.
npx skills add https://github.com/framix-team/skill-email-html-mjml --skill email-html-mjml