twitter-cards
When the user wants to add, audit, implement, or optimize Twitter Card metadata for X link previews, including twitter:card, twitter:title, twitter:description, twitter:image, or X previews. For a full metadata lifecycle use page-metadata; for broader social previews use open-graph.
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/kostja94/marketing-skills --skill twitter-cards- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads twitter-cards automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
SEO On-Page: Twitter Cards
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.
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 | 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 |
Image Requirements
| 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 |
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)
- Mechanically copying SEO copy when the share context needs different wording
- Changing the product identity or promise between SEO, OG, and X metadata
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
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.
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, meta-description: Search copy; may differ while preserving page identity
- page-metadata: Full lifecycle, source-of-truth implementation, and production validation
- 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.
FAQ
What does the twitter-cards skill do?
When the user wants to add, audit, implement, or optimize Twitter Card metadata for X link previews, including twitter:card, twitter:title, twitter:description, twitter:image, or X previews. For a full metadata lifecycle use page-metadata; for broader social previews use open-graph.
How do I install twitter-cards?
Run npx skills add https://github.com/kostja94/marketing-skills --skill twitter-cards in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/twitter-cards/ (personal) or .claude/skills/twitter-cards/ (project).
Which AI agents can use twitter-cards?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is twitter-cards safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains twitter-cards?
It is published by kostja94 in kostja94/marketing-skills. It has 1,077 recorded installs.
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