What is seo-audit-skill AGENTS.md?

Repository instructions for an SEO audit engine, which checks websites for search-engine-related problems and produces scores and reports.

They are for maintaining an SEO auditing project, running its checks, building its command-line tool, and testing its rules.

They give coding agents the project context, commands, and rules needed to change the audit tool safely.

How seo-skills/seo-audit-skill configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to seo-skills/seo-audit-skill. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/seo-skills/seo-audit-skill/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/seo-skills/seo-audit-skill

Made for: Codex, OpenCode.

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/instructions/seo-skills/seo-audit-skill/agents-md/github.svg)](https://agentmods.dev/instructions/seo-skills/seo-audit-skill/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/seo-skills/seo-audit-skill/agents-md"><img src="https://agentmods.dev/badge/instructions/seo-skills/seo-audit-skill/agents-md/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/instructions/seo-skills/seo-audit-skill/agents-md"><img src="https://agentmods.dev/badge/instructions/seo-skills/seo-audit-skill/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 1,702 This file is loaded in full into every session.

When invoked 1,702 The same file — it is already loaded in full.

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	$0.01702	$0.01702
Opus 5	$0.00851	$0.00851
Sonnet 5	$0.00340	$0.00340
Haiku 4.5	$0.00170	$0.00170

Measured 5d ago against content hash d855e05f567b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

seo-audit-skill AGENTS.md 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 5d 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.

AGENTS.md · 125 lines

How it starts

The opening of the file, as written. The whole thing — 125 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

Guidance for AI agents working in this repository. claude.md covers the same ground in more depth — read it for anything not spelled out here.

Project Overview

SEOmator (@seomator/seo-audit) is an SEO audit engine: 332 rules across 20 weighted categories, shipped as (a) an npm CLI, (b) an Electron desktop app, (c) a Claude Code skill. It fetches pages, parses HTML with Cheerio, optionally renders with Playwright (Core Web Vitals + rendered DOM), and produces weighted scores and reports.

src/ — the shared audit engine (CLI + Electron both import it)
electron/ — desktop app, purely additive, never modifies src/
docs/ — documentation, including SEO-AUDIT-RULES.md (rule reference) and PRDs
skill/ + SKILL.md — the published agent skill wrapper

Commands

npm run build        # tsup → dist/ (CLI)
npm run typecheck    # tsc --noEmit — runs on prepublish, must stay green
npm run test:run     # vitest, all tests once
npx vitest run src/rules/core/core.test.ts   # single test file
./dist/cli.js audit https://example.com --no-cwv   # smoke-run after build

Electron: npm run electron:dev etc. — but rebuild the native module first when switching sides: npx electron-rebuild -f -w better-sqlite3 before Electron, npm rebuild better-sqlite3 before CLI/tests. Mismatch → NODE_MODULE_VERSION error.

Hard Constraints (breaking these ships broken software)

package.json is dual-purpose. main = Electron entry (./dist-electron/main/index.js), exports/bin = CLI (./dist/cli.js), files: ["dist"] = only the CLI ships to npm. Do not repoint main.
Dependency split. dependencies = CLI only. React/zustand/recharts/ electron stay in devDependencies or npm users download ~15MB of UI code.
src/ stays Electron-free. Electron reaches src/ via the @core alias; never the reverse.
Category weights sum to exactly 100 (validateCategoryWeights() in src/categories/index.ts). Adding rules to an existing category does not touch this; adding/changing a category does.
Registry throws on duplicate rule IDs (src/rules/registry.ts). An accidental re-registration crashes rule loading at import time.

Read the full file on GitHub · 125 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.

5d ago First seen · 125 lines · 1,702 tokens per session scan A d855e05f567b

Subscribe to this mod's changes

seo-audit-skill AGENTS.md is an instructions file published in the GitHub repository seo-skills/seo-audit-skill (419 stars, last pushed 3d ago), licensed MIT. It adds 1,702 tokens to every session, about $0.0085 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.

Marketing and SEO claude claude-skills seo seo-audit seo-audit-skill website-audit

next.js AGENTS.md

AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.

vercel/next.js · 7,296 tokens

codex AGENTS.md

AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.

openai/codex · 5,153 tokens

vscode buildNext.instructions.md

Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).

microsoft/vscode · 6,785 tokens

seo-audit-skill: Instructions file for Codex