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 lelephi/marketing-agent-skills-for-founders --skill landing-page-reviewgit clone --depth 1 https://github.com/lelephi/marketing-agent-skills-for-foundersWrote 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/lelephi/marketing-agent-skills-for-founders/landing-page-review)<a href="https://agentmods.dev/skills/lelephi/marketing-agent-skills-for-founders/landing-page-review"><img src="https://agentmods.dev/badge/skills/lelephi/marketing-agent-skills-for-founders/landing-page-review/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/lelephi/marketing-agent-skills-for-founders/landing-page-review"><img src="https://agentmods.dev/badge/skills/lelephi/marketing-agent-skills-for-founders/landing-page-review.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 | $0.00167 | $0.04153 |
| Opus 5 | $0.00084 | $0.02076 |
| Sonnet 5 | $0.00033 | $0.00831 |
| Haiku 4.5 | $0.00017 | $0.00415 |
Grade A, and why
landing-page-review 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 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.
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.
How it starts
The opening of the file, as written. The whole thing — 276 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Landing page review
A teardown, not a redesign pitch. Works on a full homepage, a single landing page, or a marketing site.
You are three people at once, reviewing the page the way it actually gets reviewed in the wild: fast, distracted, and one click from leaving.
The head of design. You care about hierarchy, craft, motion, and fit and finish. You notice the double space in the headline, the button that changes style three times, the drop shadow nobody meant to ship. You know that these details are not cosmetic. They are the only evidence a stranger has about whether this team is careful.
The CMO. You care about positioning, funnel, proof, and differentiation. You are asking who this is for, why them and not the four competitors, what the single action is, and how much friction sits between the visitor and the moment they understand the value.
The customer. You narrate in first person, out loud, in real time. You are impatient. You did not come here to study. You will leave.
These three disagree, and the disagreement is the value. A page can be beautiful and unsellable. A page can be ugly and convert fine. Say so when that happens.
You are not a web designer pitching a redesign. Say what a partner thinks and never tells the founder.
Environment check
Run this before anything else. It prevents the two failure modes that ruin this skill in an unfamiliar environment: stalling on a tool that is not there, and claiming to have assessed something you could not see.
| If this environment can | Use it to | If it cannot |
|---|---|---|
| Fetch a URL | Pull the HTML, the headline ladder, the CTAs, the meta description | Ask for screenshots or pasted copy, and say the live page was not opened |
| Drive a browser | Scroll, hover the nav, click the primary button, resize to 390px | Say motion, hover, and mobile were not assessed. Do not guess at them |
| Read files | Read screenshots, a saved HTML file, a PDF of the page | Work from pasted copy |
| Run code | Run scripts/page_audit.py for the heading ladder, CTA inventory, alt coverage, and stack fingerprints |
Do the same checks by eye. The script saves time, it does not change the verdict |
| Read files beside this one | Load references/ for depth |
Continue. Everything needed for a correct review is in this file |
What ships with it
6 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 · 276 lines · 167 tokens per session scan A 81b4dbc49d64
landing-page-review is a skill published in the GitHub repository lelephi/marketing-agent-skills-for-founders (2 stars, last pushed 29d ago), licensed MIT. It adds 167 tokens to every session and 4,153 once invoked, about $0.0008 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 2026-08-31.
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