Agent skill

Twitter Cards

by kostja94 in kostja94/marketing-skills

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.

MITAuto-check passedMarketing & SEO

Install Twitter Cards

skills CLI

$ npx skills add kostja94/marketing-skills --skill twitter-cards -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install kostja94/marketing-skills twitter-cards --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/kostja94/marketing-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/seo/on-page/twitter-cards .claude/skills/twitter-cards && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "twitter-cards" agent skill from https://github.com/kostja94/marketing-skills/tree/main/skills/seo/on-page/twitter-cards into .claude/skills/twitter-cards/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "twitter-cards", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/kostja94/marketing-skills/tree/main/skills/seo/on-page/twitter-cards

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add kostja94/marketing-skills --skill twitter-cards -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install kostja94/marketing-skills twitter-cards --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/kostja94/marketing-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/seo/on-page/twitter-cards .agents/skills/twitter-cards && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "twitter-cards" agent skill from https://github.com/kostja94/marketing-skills/tree/main/skills/seo/on-page/twitter-cards into .agents/skills/twitter-cards/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "twitter-cards", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add kostja94/marketing-skills --skill twitter-cards -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install kostja94/marketing-skills twitter-cards --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/kostja94/marketing-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/seo/on-page/twitter-cards .cursor/skills/twitter-cards && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "twitter-cards" agent skill from https://github.com/kostja94/marketing-skills/tree/main/skills/seo/on-page/twitter-cards into .cursor/skills/twitter-cards/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "twitter-cards", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/kostja94/marketing-skills.git --path skills/seo/on-page/twitter-cards

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add kostja94/marketing-skills --skill twitter-cards -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install kostja94/marketing-skills twitter-cards --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/kostja94/marketing-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/seo/on-page/twitter-cards .gemini/skills/twitter-cards && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "twitter-cards" agent skill from https://github.com/kostja94/marketing-skills/tree/main/skills/seo/on-page/twitter-cards into .gemini/skills/twitter-cards/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "twitter-cards", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install kostja94/marketing-skills twitter-cards

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add kostja94/marketing-skills --skill twitter-cards -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/kostja94/marketing-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/seo/on-page/twitter-cards .github/skills/twitter-cards && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "twitter-cards" agent skill from https://github.com/kostja94/marketing-skills/tree/main/skills/seo/on-page/twitter-cards into .github/skills/twitter-cards/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "twitter-cards", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add kostja94/marketing-skills --skill twitter-cards -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install kostja94/marketing-skills twitter-cards --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/kostja94/marketing-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/seo/on-page/twitter-cards .opencode/skills/twitter-cards && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "twitter-cards" agent skill from https://github.com/kostja94/marketing-skills/tree/main/skills/seo/on-page/twitter-cards into .opencode/skills/twitter-cards/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "twitter-cards", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: twitter-cards
GitHub stars: 1k
Token cost: ~1.2k tokens
SKILL.md length: 427 words
Files: 1
Skills in repo: 102
Repo updated: Oct 6, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

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.

Optimize Twitter Card metadata for X link previews
SKILL.md covers Scope (Social Sharing), Card Types, Recommended Tags… and Image Requirements, plus 4 more sections
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
Including twitter:card

What it does

Twitter Cards is an agent skill from kostja94/marketing-skills. 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.

Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Marketing & SEO. It works with X (Twitter). The repository describes itself as: Agent Skills for Marketing — SEO, Social, Influencer & More. 160+ open-source skills for SEO, content, 40+ page types, paid ads, channels, and strategies. Add project context… The licence is MIT.

When your agent uses it

Optimize Twitter Card metadata for X link previews
Including twitter:card
Twitter:description

Example prompts

“/twitter-cards”

What it can do on your machine

Read from SKILL.md and the folder at commit 8dd89c5. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are html and typescript).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Twitter Cards loads about 1.2k tokens when it runs. Until then it costs about 74 tokens; SKILL.md has 427 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~74
When it runs · the whole SKILL.md, loaded when a task matches: ~1.2k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from kostja94/marketing-skills at commit 8dd89c5, republished under its MIT licence (© kostja94). 427 words, ~1,195 tokens.

Download SKILL.mdSave it as .claude/skills/twitter-cards/SKILL.md (or your agent's skills folder).

name: twitter-cards
description: 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.
metadata.version: 2.0.0

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.

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)

html

<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

Show full SKILL.md (155 more words)Show less

Implementation

Next.js (App Router)

tsx

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

HTML (generic)

html

<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.

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.

Files

Just SKILL.md in skills/seo/on-page/twitter-cards of kostja94/marketing-skills.

Open the folder on GitHubat commit 8dd89c5

Compare with similar skills

Twitter Cards next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Twitter Cards compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Twitter Cards this skillkostja94/marketing-skills	1k	—	~1.2k	Automated safety check: Pass	MIT	4 days ago
Canghe Post To Xfreestylefly/canghe-skills	461	4 repos	~1.7k	Automated safety check: Warn	None	4 mo ago
AdsCesarjoquin/Marketing-Skills	202	1 repos	~3.5k	Automated safety check: Pass	MIT	26 days ago
Adscoreyhaines31/marketingskills	54k	1 repos	~7k	Automated safety check: Pass	MIT	2 days ago
Influencer Discoverytigerless-labs/influencer-discovery	212	—	~2.5k	Automated safety check: Notes	None	18 days ago
SEO PageAgriciDaniel/codex-seo	799	5 repos	~1.2k	Automated safety check: Pass	MIT	28 days ago

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Questions about Twitter Cards

What does Twitter Cards 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. Twitter Cards is an agent skill from kostja94/marketing-skills. 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.

When should I use Twitter Cards?

Twitter Cards fits situations like: optimize Twitter Card metadata for X link previews; including twitter:card; twitter:description.

How do I install Twitter Cards in Claude Code?

Run `npx skills add kostja94/marketing-skills --skill twitter-cards -a claude-code`. Or copy the skill folder (skills/seo/on-page/twitter-cards in kostja94/marketing-skills) into .claude/skills/twitter-cards in your project. Claude Code loads it when a task matches its description.

How do I install Twitter Cards in Codex?

Run `npx skills add kostja94/marketing-skills --skill twitter-cards -a codex`. Or copy the skill folder (skills/seo/on-page/twitter-cards in kostja94/marketing-skills) into .agents/skills/twitter-cards in your project. Codex loads it when a task matches its description.

Can I use Twitter Cards in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add kostja94/marketing-skills --skill twitter-cards -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/twitter-cards, .gemini/skills/twitter-cards, .github/skills/twitter-cards and .opencode/skills/twitter-cards in your project.

What does Twitter Cards need to run?

SKILL.md names no scripts, command-line tools or credentials: Twitter Cards is instructions for the agent only.

Does Twitter Cards access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Twitter Cards safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Twitter Cards use?

Twitter Cards is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Twitter Cards use?

About 1.2k tokens (SKILL.md is roughly 4.8k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Twitter Cards?

Skills that share tags, products or a category with Twitter Cards: Canghe Post To X (freestylefly/canghe-skills, 461 stars), Ads (Cesarjoquin/Marketing-Skills, 202 stars), Ads (coreyhaines31/marketingskills, 54k stars) and Influencer Discovery (tigerless-labs/influencer-discovery, 212 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Twitter Cards?

kostja94 (a GitHub user) maintains it in kostja94/marketing-skills, which has 1,025 GitHub stars. The repository holds 102 skills in this directory. The repository was last updated on October 6, 2026.

Source: kostja94/marketing-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Twitter Cards

Facts

At a glance

What it does

When your agent uses it

Example prompts

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

SEO On-Page: Twitter Cards

Scope (Social Sharing)

Card Types

Recommended Tags (summary_large_image)

Image Requirements

Common Mistakes

Implementation

Next.js (App Router)

HTML (generic)

Testing

Related Skills

Files

Compare with similar skills

Similar skills

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Related

Questions about Twitter Cards