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
Recommended Tags (summary_large_image)
Image Requirements
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)
HTML (generic)
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.
