Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/lossless-group/lossless-agent-skillsnpx agentmods add skills/lossless-group/lossless-agent-skills/open-graph-share-seo-geoWrote 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/lossless-group/lossless-agent-skills/open-graph-share-seo-geo)<a href="https://agentmods.dev/skills/lossless-group/lossless-agent-skills/open-graph-share-seo-geo"><img src="https://agentmods.dev/badge/skills/lossless-group/lossless-agent-skills/open-graph-share-seo-geo/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/lossless-group/lossless-agent-skills/open-graph-share-seo-geo"><img src="https://agentmods.dev/badge/skills/lossless-group/lossless-agent-skills/open-graph-share-seo-geo.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00226 | $0.06864 |
| Opus 5 | $0.00113 | $0.03432 |
| Sonnet 5 | $0.00045 | $0.01373 |
| Haiku 4.5 | $0.00023 | $0.00686 |
Grade A, and why
open-graph-share-seo-geo scanned grade A with 1 finding 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 12d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
**Rule:** Verify with `curl -sI` (no `Accept` header) what `content-type` the server returns. Whatever that is — `image/jpeg`, `image/png`, `image/webp` — is what goes in `<meta property="og:image:type">`. The URL's file How it starts
The opening of the file, as written. The whole thing — 426 lines — stays where its author put it; the contents beside it link to each section on GitHub.
OpenGraph, Share, SEO & GEO
Make the link unfurl. Make it fast. Make it match the bytes.
Lossless Group convention for share metadata across all sites (Astro Knots, plugin pages, splash, fundraise decks). Optimized for iMessage and WhatsApp first (the channels we share through most), with Slack, Discord, LinkedIn, X, Facebook, and generative engines (Perplexity, ChatGPT, Claude, Gemini) as concentric rings around that.
When to use this skill
- Adding or auditing
<head>meta tags on any page that gets shared - "It's not unfurling in iMessage / WhatsApp / Slack" debugging
- Picking the OG image format (
.webpvs.jpgvs.png) - Deciding where to host the OG image (
/publicvs CDN) - Building or modifying a
MetaTags-style component - Reviewing or shipping a marketing splash, plugin page, blog post, fundraise deck
- Setting up GEO (Generative Engine Optimization) on a content-heavy page
- Scaffolding
/llms.txtand/llms-full.txtfor LLM corpus ingest, or porting that pattern to a new splash - Adding
@astrojs/sitemap+robots.txtto a splash or marketing site for proper search-engine discoverability
Hard rules (Why + How to apply)
1. Host the OG image on a remote CDN, not /public
Rule: Default OG image goes on a CDN (ImageKit, Cloudflare Images, S3+CloudFront, Vercel Blob). Do not point og:image at a local /public/og.png served by GitHub Pages or a static host.
Why: Local assets behind GitHub Pages unfurl intermittently in iMessage, WhatsApp, and Slack. The original page renders fine, but the unfurler silently skips the image — usually because of slow first-byte time, missing Content-Length, missing CORS, or aggressive negative caching. CDNs (ImageKit in particular) ship the right headers (access-control-allow-origin: *, cache-control: public, max-age=…, accurate content-length, etag) and serve from edges close to the unfurler.
How to apply: When scaffolding a new site's OG defaults, upload the banner to ImageKit first and reference the absolute URL. Treat /public/og-default.png as a fallback only — better yet, do not bother committing it.
What ships with it
5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 12d ago First seen · 426 lines · 226 tokens per session scan A a794df48f117
open-graph-share-seo-geo is a skill published in the GitHub repository lossless-group/lossless-agent-skills (4 stars, last pushed 19d ago), licensed MIT. It adds 226 tokens to every session and 6,864 once invoked, about $0.0011 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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