Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add kostja94/marketing-skills --skill twitter-cardsgit clone --depth 1 https://github.com/kostja94/marketing-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/kostja94/marketing-skills/twitter-cards)<a href="https://agentmods.dev/skills/kostja94/marketing-skills/twitter-cards"><img src="https://agentmods.dev/badge/skills/kostja94/marketing-skills/twitter-cards/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/kostja94/marketing-skills/twitter-cards"><img src="https://agentmods.dev/badge/skills/kostja94/marketing-skills/twitter-cards.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00067 | $0.01022 |
| Opus 5 | $0.00034 | $0.00511 |
| Sonnet 5 | $0.00013 | $0.00204 |
| Haiku 4.5 | $0.00007 | $0.00102 |
Grade A, and why
twitter-cards scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
Copies of this mod
2 near-identical copies found in the catalogue:
- twitter-cards — 100% identical, 0 lines differ
- twitter-cards — 89% identical, 1 lines differ
How it starts
The opening of the file, as written. The whole thing — 108 lines — stays where its author put it; the contents beside it link to each section on GitHub.
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
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 9d ago First seen · 108 lines · 67 tokens per session scan A ae34b9c409d1
twitter-cards is a skill published in the GitHub repository kostja94/marketing-skills (967 stars, last pushed 3mo ago), licensed MIT. It adds 67 tokens to every session and 1,022 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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