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 RyosukeSAMA/github-ai --skill build-web-previewgit clone --depth 1 https://github.com/RyosukeSAMA/github-aiWrote 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/ryosukesama/github-ai/build-web-preview)<a href="https://agentmods.dev/skills/ryosukesama/github-ai/build-web-preview"><img src="https://agentmods.dev/badge/skills/ryosukesama/github-ai/build-web-preview/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/ryosukesama/github-ai/build-web-preview"><img src="https://agentmods.dev/badge/skills/ryosukesama/github-ai/build-web-preview.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 | $0.00034 | $0.00209 |
| Opus 5.5 | $0.00014 | $0.00084 |
| Sonnet 5.5 | $0.00007 | $0.00042 |
| Haiku 4.5 | $0.00003 | $0.00021 |
Grade A, and why
build-web-preview 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 1mo 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.
What it actually says
Build Web Preview
Apollo owns visual direction and Hephaestus owns implementation quality.
Workflow
- Infer the audience, primary workflow, content hierarchy, and required states.
- Choose a restrained visual system appropriate to the product instead of a generic AI landing-page style.
- Produce a complete responsive document with accessible semantics.
- Use real content and working links supplied by the user.
- Include interaction states expected for the requested experience.
- Check narrow and wide layouts conceptually before returning the artifact.
- Return the final page in one fenced
htmlblock so Pantheon Preview can open it.
Prefer a self-contained HTML document with inline CSS and JavaScript unless the user requests a project structure. Do not claim external assets are available unless they are embedded or referenced by a valid URL.
What ships with it
2 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.
- 1mo ago First seen · 24 lines · 34 tokens per session scan A e612fdf88e96
build-web-preview is a skill published in the GitHub repository RyosukeSAMA/github-ai (5 stars, last pushed today), licensed MIT. It adds 34 tokens to every session and 209 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-08-31.
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