How do I install the Viewport skill?

Run npx skillmds@latest add thedaviddias/viewport in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

What does the Viewport skill do?

Use when reviewing templates, rendered HTML, or shared components related to Set the responsive viewport meta tag. Validate the final browser-facing markup, not just the source framework abstraction. It is listed under Web & Frontend on SkillMD.

Is Viewport safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Viewport?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Viewport free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Viewport?

thedaviddias (@thedaviddias) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Viewport by thedaviddias — Agent Skill

Name: Viewport
Author: thedaviddias

File contents

Set the responsive viewport meta tag

Without the viewport meta tag, mobile browsers render pages at desktop width (typically 980px) then shrink them, making text unreadable without zooming.

Quick Reference

Add <meta name="viewport" content="width=device-width, initial-scale=1.0">
Never use maximum-scale=1 or user-scalable=no (breaks accessibility)
Essential for mobile-responsive layouts

Check

Verify that this HTML document includes a proper viewport meta tag for responsive design that controls how the page is displayed on mobile devices.

Fix

Add the viewport meta tag: in the head section.

Explain

Explain how the viewport meta tag enables responsive design and why it's essential for mobile-first web development.

Code Review

Review templates, server-rendered HTML, and shared components that output markup related to Set the responsive viewport meta tag. Flag exact elements, attributes, and routes where the rendered HTML violates the rule.

For full implementation details, code examples, and framework-specific guidance, see references/rule.md.

Rule page: https://frontendchecklist.io/en/rules/html/viewport

Frequently asked questions

Viewport