Audit Website
theexperiencecompany/gaia
Audit websites for SEO, performance, security, technical, content, and 15 other issue cateories with 230+ rules using the squirrelscan CLI.
A skill your agent uses when reviewing templates, rendered HTML, or shared components related to Set the responsive viewport meta tag.
Install Viewport
$ npx skills add thedaviddias/Front-End-Checklist --skill viewport -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install thedaviddias/Front-End-Checklist viewport --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/viewport .claude/skills/viewport && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "viewport" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/viewport into .claude/skills/viewport/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "viewport", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/viewportType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add thedaviddias/Front-End-Checklist --skill viewport -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install thedaviddias/Front-End-Checklist viewport --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/viewport .agents/skills/viewport && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "viewport" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/viewport into .agents/skills/viewport/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "viewport", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add thedaviddias/Front-End-Checklist --skill viewport -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install thedaviddias/Front-End-Checklist viewport --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/viewport .cursor/skills/viewport && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "viewport" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/viewport into .cursor/skills/viewport/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "viewport", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/thedaviddias/Front-End-Checklist.git --path skills/viewport--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add thedaviddias/Front-End-Checklist --skill viewport -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install thedaviddias/Front-End-Checklist viewport --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/viewport .gemini/skills/viewport && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "viewport" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/viewport into .gemini/skills/viewport/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "viewport", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install thedaviddias/Front-End-Checklist viewportInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add thedaviddias/Front-End-Checklist --skill viewport -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/viewport .github/skills/viewport && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "viewport" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/viewport into .github/skills/viewport/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "viewport", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add thedaviddias/Front-End-Checklist --skill viewport -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install thedaviddias/Front-End-Checklist viewport --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/viewport .opencode/skills/viewport && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "viewport" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/viewport into .opencode/skills/viewport/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "viewport", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
viewport- GitHub stars
- 74k
- Token cost
- ~414 tokens
- SKILL.md length
- 150 words
- Files
- 2 (incl. references)
- Skills in repo
- 390
- Repo updated
- First seen
- Licence
- MIT
At a glance
A skill your agent uses when reviewing templates, rendered HTML, or shared components related to Set the responsive viewport meta tag.
- Reviewing templates
- SKILL.md covers Quick Reference, Check, Fix and Explain, plus 1 more section
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Shared components related to Set the responsive viewport meta tag
What it does
Viewport is an agent skill from thedaviddias/Front-End-Checklist. 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.
Its SKILL.md is about 410 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/rule.md`).
It sits in Marketing & SEO, covering On-page SEO. The repository describes itself as: 🗂 The essential checklist for modern web development, for humans and AI agents. The licence is MIT.
When your agent uses it
- Reviewing templates
- Shared components related to Set the responsive viewport meta tag
Example prompts
- “/viewport”
What it can do on your machine
Read from SKILL.md and the folder at commit e8d14d0. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
frontendchecklist.io
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Viewport loads about 414 tokens when it runs, and up to ~1.5k if it reads all its reference files. Until then it costs about 52 tokens; SKILL.md has 150 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from thedaviddias/Front-End-Checklist at commit e8d14d0, republished under its MIT licence (© thedaviddias). 150 words, ~414 tokens.
Download SKILL.mdSave it as
.claude/skills/viewport/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.- name
- viewport
- description
- 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.
- metadata.category
- html
- metadata.priority
- critical
- metadata.difficulty
- beginner
- metadata.estimatedTime
- 5
- metadata.source
- frontendchecklist.io
- metadata.url
- https://frontendchecklist.io/rules/html/viewport
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=1oruser-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: <meta name="viewport" content="width=device-width, initial-scale=1.0"> 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.
© thedaviddias, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 1 other file (references) in skills/viewport of thedaviddias/Front-End-Checklist.
- SKILL.md
- references/rule.md
Open the folder on GitHubat commit e8d14d0
Compare with similar skills
Viewport next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Viewport this skillthedaviddias/Front-End-Checklist | 74k | — | ~414 | Automated safety check: Pass | MIT | |
| Audit Websitetheexperiencecompany/gaia | 308 | 1 repos | ~4.7k | Automated safety check: Pass | Custom licence | |
| Metadata Checkjdevalk/skills | 105 | — | ~1k | Automated safety check: Pass | MIT | |
| Content Writeraaron-he-zhu/aaron-marketing-skills | 2.9k | — | ~3.6k | Automated safety check: Pass | Apache-2.0 | |
| Business Website Setupsickn33/agentic-awesome-skills | 47k | 1 repos | ~6.2k | Automated safety check: Pass | MIT | |
| Google Search Consolekostja94/marketing-skills | 1k | — | ~3.3k | Automated safety check: Pass | MIT |
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Audits article and blog pages for visible publish dates, Article JSON-LD with datePublished and dateModified, and Open Graph time tags, then fixes what is missing.
FAQPage Schema Markup
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Adds, checks and fixes FAQPage JSON-LD on pages with visible question-and-answer sections so it matches what readers see and can qualify for rich results.
Favicon Audit and Setup
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Checks that a site's favicon is linked, reachable and large enough for Google search results, and sets up ICO, SVG and Apple touch icon files when they are missing.
Content Freshness Signals
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Audits article pages for freshness signals, covering the Last-Modified header, Article JSON-LD dateModified and a visible last-updated date, and fixes mismatches.
Geo Meta Tags Audit
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Audits and fixes geo.region, geo.placename and geo.position meta tags on regional pages, noting where they help (Bing) and where they do not (Google).
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Scores and rewrites a Front-End Checklist rule MDX file against a scored quality rubric, replacing generic stub prompts with specific, actionable ones.
Related
Categories
Questions about Viewport
What does Viewport do?
A skill your agent uses when reviewing templates, rendered HTML, or shared components related to Set the responsive viewport meta tag. Viewport is an agent skill from thedaviddias/Front-End-Checklist. Use when reviewing templates, rendered HTML, or shared components related to Set the responsive viewport meta tag.
When should I use Viewport?
Viewport fits situations like: reviewing templates; shared components related to Set the responsive viewport meta tag.
How do I install Viewport in Claude Code?
Run `npx skills add thedaviddias/Front-End-Checklist --skill viewport -a claude-code`. Or copy the skill folder (skills/viewport in thedaviddias/Front-End-Checklist) into .claude/skills/viewport in your project. Claude Code loads it when a task matches its description.
How do I install Viewport in Codex?
Run `npx skills add thedaviddias/Front-End-Checklist --skill viewport -a codex`. Or copy the skill folder (skills/viewport in thedaviddias/Front-End-Checklist) into .agents/skills/viewport in your project. Codex loads it when a task matches its description.
Can I use Viewport in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add thedaviddias/Front-End-Checklist --skill viewport -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/viewport, .gemini/skills/viewport, .github/skills/viewport and .opencode/skills/viewport in your project.
What does Viewport need to run?
SKILL.md names no scripts, command-line tools or credentials: Viewport is instructions for the agent only.
Does Viewport access the network?
SKILL.md names 1 domain. As links in the text: frontendchecklist.io. This is read from the text; nothing was executed.
Is Viewport safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Viewport use?
Viewport is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Viewport use?
About 414 tokens (SKILL.md is roughly 1.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 1.1k tokens, read only when the agent opens those files.
What are the alternatives to Viewport?
Skills that share tags, products or a category with Viewport: Audit Website (theexperiencecompany/gaia, 308 stars), Metadata Check (jdevalk/skills, 105 stars), Content Writer (aaron-he-zhu/aaron-marketing-skills, 2.9k stars) and Business Website Setup (sickn33/agentic-awesome-skills, 47k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Viewport?
thedaviddias (a GitHub user) maintains it in thedaviddias/Front-End-Checklist, which has 74,421 GitHub stars. The repository holds 390 skills in this directory. The repository was last updated on October 6, 2026.
Source: thedaviddias/Front-End-Checklist on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.