/twitter-cards

name: twitter-cards
description: When the user wants to add or optimize Twitter Card metadata for X (Twitter) link previews. Also use when the user mentions "Twitter Card," "twitter:card," "twitter:image," "twitter:title," "X preview," or "tweet preview." For Facebook/LinkedIn previews, use open-graph.
metadata:
  version: 1.1.0

SEO On-Page: Twitter Cards

Guides implementation of Twitter Card meta tags for X (Twitter) link previews. Twitter falls back to Open Graph if Twitter-specific tags are missing; add both for best results.

**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.

Scope (Social Sharing)

• **Twitter Cards**: X-specific meta tags; control how links appear when shared on X/Twitter

Card Types

| 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 |

Recommended Tags (summary_large_image)

<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** | Max 70 chars; concise title | | **twitter:description** | Max 200 chars; summary | | **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 |

Image Requirements

| Item | Guideline | |------|-----------| | **Aspect ratio** | 2:1 | | **Minimum** | 300×157 px | | **Recommended** | 1200×675 px | | **Max** | 4096×4096 px | | **File size** | Under 5MB | | **Formats** | JPG, PNG, WebP, GIF (first frame only); SVG not supported |

Common Mistakes

• Missing Twitter Card tags (Twitter won't display images properly without them)
• Using relative image URLs instead of absolute https://
• Images too small or wrong aspect ratio
• Title/description too long (gets truncated)

Implementation

Next.js (App Router)

export const metadata = {
  twitter: {
    card: 'summary_large_image',
    title: '...',
    description: '...',
    images: ['https://example.com/twitter.jpg'],
    site: '@yourusername',
    creator: '@authorusername',
  },
};

HTML (generic)

<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">

Testing

• **X (Twitter)**: [Card Validator](https://cards-dev.twitter.com/validator)

Related Skills

• **social-share-generator**: Share buttons use Twitter Cards for X previews when users share; Cards must be set for share buttons to show proper previews
• **open-graph**: OG tags; Twitter falls back to OG if Twitter tags missing
• **title-tag**: Title tag often mirrors twitter:title
• **meta-description**: Meta description often mirrors twitter:description
• **page-metadata**: Hreflang, other meta tags
• **twitter-x-posts**: X post copy and engagement (different from link previews)
• **twitter-card-image-generator**: Programmatic Twitter Card image generation — 1200×675px, 2:1 ratio, player card posters, dark mode adaptations for ~40% of X users, timeline-safe zone design for mobile 1:1 crop, all 6 visual styles from og-image-generator. This skill covers how to SET the twitter:image tag; twitter-card-image-generator covers how to CREATE the image.