twitter-cards — independently scanned and version-tracked by SaferSkills.
SaferSkills independently audited twitter-cards (Agent Skill) and scored it 100/100 (green). The audit ran 55 deterministic rules across Security, Supply Chain, Maintenance, Transparency, and Community; it found 0 high-severity and 0 lower-severity findings. The full rule-by-rule trace and per-finding evidence are below. Free, methodology-open.
Findings & checks · 0 flagged
Every scanned point with the score it earned and what moved between them.
First recorded scan — no prior version to compare against.
The primary manifest — the file an agent reads to learn what this artifact does.
Owns X/Twitter Card writing and implementation rules. page-metadata owns the full-page lifecycle and release verification. Platforms may use Open Graph fallbacks, so define X-specific copy only when it adds value.
When invoking: On first use, if helpful, open with 1–2 sentences on what this skill covers and why it matters, then provide the main output. On subsequent use or when the user asks to skip, go directly to the main output.
| Type | Use case |
|---|---|
| summary | Small card with thumbnail |
| summary_large_image | Large prominent image (recommended; 1200×675px) |
| app | Mobile app promotion |
| player | Video/audio content |
<meta name="twitter:card" content="summary_large_image">
<meta name="twitter:title" content="Your Title">
<meta name="twitter:description" content="Your description">
<meta name="twitter:image" content="https://example.com/image.jpg">
<meta name="twitter:site" content="@yourusername">
<meta name="twitter:creator" content="@authorusername">
<meta name="twitter:image:alt" content="Alt text for image">| Tag | Guideline |
|---|---|
| twitter:card | Required; summary_large_image for most pages |
| twitter:title | Concise social title; same page identity as SEO/OG copy, not necessarily identical text |
| twitter:description | Accurate social summary without unsupported claims |
| twitter:image | Absolute URL; unique per page |
| twitter:site | @username of website |
| twitter:creator | @username of content creator |
| twitter:image:alt | Alt text; max 420 chars; accessibility |
| Item | Guideline |
|---|---|
| Aspect ratio | 2:1 |
| Minimum | 300×157 px |
| Recommended | Use a high-resolution image suited to the selected card and verify current platform behavior |
| Delivery | Absolute HTTPS URL with a successful image response |
| Format and size | Verify against current X documentation when implementation depends on exact limits |
export const metadata = {
twitter: {
card: 'summary_large_image',
title: '...',
description: '...',
images: ['https://example.com/twitter.jpg'],
site: '@yourusername',
creator: '@authorusername',
},
};<meta name="twitter:card" content="summary_large_image">
<meta name="twitter:title" content="Your Title">
<meta name="twitter:description" content="Your description">
<meta name="twitter:image" content="https://example.com/image.jpg">
<meta name="twitter:site" content="@yourusername">
<meta name="twitter:image:alt" content="Alt text">Inspect the deployed initial HTML and test an actual share/preview workflow available to the current X product. Do not depend on the retired public Card Validator as a release gate. Allow for cached previews.
~30 seconds. Free. No account. Every finding cites a rule and a line of evidence.