A set of rules for making web pages more likely to be quoted in answers from AI search tools. It also covers ordinary search ranking and checks pages with a tool called pseolint.

It is for writing direct answers, adding specific facts and sources, checking that headings match their content, and auditing pages for these practices.

A page can rank in search results without being used as a source by an AI answer. These rules turn advice about AI visibility into checks that can be run and reviewed.

aeo — Skill for Claude Code and Codex by ouranos-labs

Install

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.

Any agent

npx skills add ouranos-labs/pseolint --skill aeo

Clone the repo

git clone --depth 1 https://github.com/ouranos-labs/pseolint

Made for: Claude Code, Codex.

Its marketplace also offers this one on its own, as the plugin aeo — /plugin install aeo after adding the marketplace above.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/ouranos-labs/pseolint/aeo/github.svg)](https://agentmods.dev/skills/ouranos-labs/pseolint/aeo)

Your own site

<a href="https://agentmods.dev/skills/ouranos-labs/pseolint/aeo"><img src="https://agentmods.dev/badge/skills/ouranos-labs/pseolint/aeo/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/ouranos-labs/pseolint/aeo"><img src="https://agentmods.dev/badge/skills/ouranos-labs/pseolint/aeo.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,077 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00000	$0.01077
Opus 5	$0.00000	$0.00539
Sonnet 5	$0.00000	$0.00215
Haiku 4.5	$0.00000	$0.00108

Measured 9d ago against content hash d346c2dba9e3, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

aeo 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.

skills/aeo/SKILL.md · 83 lines

How it starts

The opening of the file, as written. The whole thing — 83 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Answer-engine optimization, with teeth

Search is splitting in two: classic ranking, and being the source an AI answer cites. AEO (a.k.a. GEO) is optimizing for the second. The May 2026 spam-policy revision put manipulation of AI answers explicitly in scope, so the upside and the risk are both real.

This skill is different from generic AEO advice: every recommendation maps to a pseolint aeo/* rule you can actually run. You don't hope a page is citable; you run pseolint and the rule tells you.

The AEO checklist: each line is an enforced rule

Thresholds live in the engine and drift; cite the rule and let pseolint --explain <rule> (or the MCP rule resource) give the current number.

Lead with the answer. A direct, self-contained answer (≈ first 300 chars, in a <p> right under the heading) is what gets extracted. Enforced by aeo/answer-first.
Be citable, not vague. Concrete, attributable facts: numbers, dates, named sources: are what AI engines quote. Enforced by aeo/citable-facts.
Don't bait, deliver. Headlines that promise an answer the body never gives get skipped (and look spammy). Enforced by aeo/summary-bait.
Modular, extractable structure. Self-contained sections under clear headings extract cleanly; walls of prose don't. Enforced by aeo/content-modularity.
Answer the actual questions. Real FAQ coverage of the query's sub-questions. Enforced by aeo/faq-coverage.
Show freshness. Visible, structured publish/modified dates: AI answers favor current sources. Enforced by aeo/freshness-signals.
Let the answer engines in. Don't block AI crawlers (GPTBot, PerplexityBot, Google-Extended, ClaudeBot) in robots. Enforced by aeo/crawler-access (honors Allow per RFC 9309).
Ship llms.txt. A machine-readable map of your canonical, citable content. Enforced by aeo/llms-txt.

Verify: don't eyeball it

# Crawl the site and get the per-page AEO findings
npx pseolint https://yoursite.com

Read the full file on GitHub · 83 lines

Changes

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 · 83 lines · 0 tokens per session scan A d346c2dba9e3

Subscribe to this mod's changes

aeo is a skill published in the GitHub repository ouranos-labs/pseolint (6 stars, last pushed 2d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,077 tokens. 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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