twitter:card type is explicitly set

Without an explicit twitter:card tag, Twitter/X selects the card type automatically based on available OG tags. This fallback produces inconsistent results: pages with large hero images may get a summary card (small thumbnail) instead of summary_large_image, and the card format can differ between share events as Twitter's heuristics change. The twitter:card type determines whether your link preview shows a prominent full-width image or a small inline thumbnail. Per the Twitter Cards spec, explicit configuration is the only way to guarantee card format. A page that should render with a large image card but falls back to a summary card shows a thumbnail that competes poorly in image-forward social feeds.

Set twitter:card in the root layout as a default, then override per content type where needed:

// app/layout.tsx
export const metadata: Metadata = {
  twitter: {
    card: 'summary_large_image',
  },
}

The summary_large_image type is appropriate for most content pages. Override with summary on utility pages like /login, /settings, and /404 where a large image card is not appropriate. This single root layout addition is the minimum required to pass this check.

• ID: twitter-card-type-set

• Severity: high

• What to look for: Check for explicit twitter:card configuration across the project. In Next.js App Router, look for metadata.twitter.card in layout or page files. For other frameworks, look for <meta name="twitter:card"> tags. Twitter/X does not require explicit card tags if OG tags are present — it will fall back — but explicit configuration is strongly preferred to ensure correct card type rendering. Count every page template and enumerate which include twitter:card, twitter:title, twitter:description, and twitter:image tags.

• Pass criteria: twitter:card is explicitly set at least in the root layout (as a default), with appropriate overrides for content pages that need a different card type. At least 1 implementation must be confirmed.

• Fail criteria: No twitter:card is set anywhere in the project. (Note: if OG tags are fully present, Twitter will render a card, but the card type is undefined — this still fails this check.)

• Skip (N/A) when: Project type is api with no public-facing pages.

• Cross-reference: The twitter-card-type-appropriate check verifies the card type is correctly matched to the content type.

• Detail on fail: "No twitter:card meta tag set anywhere in the project. Twitter/X will use OG fallback but card rendering type is uncontrolled."

• Remediation: twitter:card controls how your link previews appear on Twitter/X. Without it, Twitter chooses a card type automatically, which may not be what you want. Set it explicitly:

  // app/layout.tsx — root default
  export const metadata: Metadata = {
    twitter: {
      card: 'summary_large_image',
    },
  }
  

  For pages where a large image card is not appropriate (e.g., a simple profile page), override with summary. The summary_large_image type produces a prominent image-forward card and is appropriate for most content pages.