Responsive HTML Email Coder
Generate production-ready, responsive HTML emails from brand tokens with Outlook VML and Gmail inlining.
Free
Works with the AI tools you already use
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Grok Bot+18 agentsResponsive HTML Email Coder
Example session with this skill installed
Read ./tokens/tokens.css and generate a responsive transactional password reset email. Include a logo, a primary CTA button, and a footer with an unsubscribe link.
- Read your context and instructions
- Compiled the responsive html email
I've generated the password reset template. I resolved --color-primary to #3B82F6 and --font-sans to Arial. The output includes a VML-backed 'Reset Password' button for Outlook and inlined styles for Gmail. File saved to ./emails/transactional-password-reset.html.
Connects securely to your tools. The creator never sees your data.
About this skill
The problem
Hand-coding HTML emails is a nightmare of 1990s table layouts, Outlook-specific VML bugs, and inconsistent Gmail CSS support. Maintaining brand consistency while ensuring layouts don't break across dozens of devices and dark mode settings takes hours of manual testing.
What it does
- Generates four distinct template types: Transactional, Marketing, Newsletter, and Confirmation.
- Injects Outlook-safe VML code for bulletproof buttons and background images.
- Automatically inlines CSS styles to ensure compatibility with the Gmail web interface.
- Resolves CSS design tokens into hardcoded HEX values to bypass lack of
var()support in email clients. - Implements dark mode overrides using
prefers-color-schemeand Gmail-specific attribute selectors.
Frameworks & tools
Produces standalone HTML compatible with SendGrid, Mailchimp, AWS SES, Postmark, Resend, and any platform supporting custom HTML uploads.
Why this beats prompting it yourself
Generic LLM prompts often produce code that breaks in Outlook or uses modern CSS variables that email clients ignore. This skill follows a rigorous component library that handles MSO conditional comments, accessibility roles, and Gmail clipping limits out of the box.
Use cases
- Convert brand CSS design tokens into a consistent transactional email system.
- Refactor an existing welcome email to support dark mode and mobile responsiveness.
- Bootstrap a newsletter template with article cards and social links that stack on mobile.
- Create an automated order confirmation table that renders correctly in legacy desktop clients.
Known limitations
Outlook for Windows does not support border-radius on containers; these will render with square corners. Gmail may clip emails exceeding 102KB.
How to install
Works the same in every agent - Claude, Cursor, Codex, Copilot and 20+ more.
- 1
Download the ZIP
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- 2
Unzip into your skills folder
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- 3
Ask your agent to use it
Restart the agent if it was already running. It picks the skill up automatically - no config needed.
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Click the path to copy it. Create the folder if it does not exist yet.
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