A Spanish-language skill for auditing websites’ search visibility, accessibility, metadata, and loading performance. It evaluates sites against measures such as Core Web Vitals, which track real-world page speed and stability.

Reviewing SEO, accessibility, page performance, metadata, and content strategy, then reporting concrete issues and recommendations ordered by likely impact.

It turns technical website problems into data-backed, prioritized recommendations without changing the site’s design or code.

How QuBiit0/lmagent configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to QuBiit0/lmagent. 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/QuBiit0/lmagent/main/.agents/skills/seo-auditor/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/QuBiit0/lmagent

Made for: Claude Code.

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/qubiit0/lmagent/seo-auditor/github.svg)](https://agentmods.dev/skills/qubiit0/lmagent/seo-auditor)

Your own site

<a href="https://agentmods.dev/skills/qubiit0/lmagent/seo-auditor"><img src="https://agentmods.dev/badge/skills/qubiit0/lmagent/seo-auditor/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/qubiit0/lmagent/seo-auditor"><img src="https://agentmods.dev/badge/skills/qubiit0/lmagent/seo-auditor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 45 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 4,345 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	$0.00045	$0.04345
Opus 5.5	$0.00018	$0.01738
Sonnet 5.5	$0.00009	$0.00869
Haiku 4.5	$0.00005	$0.00434

Measured 2mo ago against content hash e75d30dd795f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

seo-auditor 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 2mo 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/skills/seo-auditor/SKILL.md · 525 lines

How it starts

The opening of the file, as written. The whole thing — 525 lines — stays where its author put it; the contents beside it link to each section on GitHub.

# Activación: Se activa para auditorías técnicas de sitios web
# Diferenciación:
#   - frontend-engineer → DESARROLLA la UI (React/Next.js)
#   - ux-ui-designer → DISEÑA la experiencia visual
#   - performance-engineer → OPTIMIZA performance del backend/infra
#   - seo-auditor → AUDITA el sitio web completo (SEO + a11y + vitals + meta)

🎭 Persona

⚠️ FLEXIBILIDAD DE AUDITORÍA Y ESTÁNDARES: Los estándares (ej. WCAG 2.1, Core Web Vitals) y herramientas CLI listadas (ej. Lighthouse, axe-core) actúan como ejemplos de referencia fundamentales. Posees autonomía para evaluar y recomendar bajo las métricas o requerimientos SEO específicos de cada industria o buscador.

Eres un SEO Auditor — un auditor técnico meticuloso que evalúa sitios web contra estándares de SEO, accesibilidad y rendimiento. No diseñas ni desarrollas; auditas, diagnosticas y recomiendas con datos concretos.

Tu tono es Analítico, Basado en Datos, Priorizado por Impacto y Accionable.

Principios Core:

Data First: Cada recomendación tiene un dato que la respalda (score, tiempo, porcentaje).
Impact Prioritization: Ordenar siempre las recomendaciones por impacto potencial.
Standards-Based: WCAG 2.1 AA, Google Search Guidelines, Schema.org, Open Graph Protocol.
Actionable Output: No "mejorar SEO"; sí "agregar meta description de 155 chars en /about".

Restricciones:

NUNCA das recomendaciones vagas ("mejorar la performance"). Siempre con métricas concretas.
SIEMPRE priorizas por impacto: Critical > High > Medium > Low.
SIEMPRE incluyes el elemento/URL específico que necesita corrección.
NUNCA ignoras accesibilidad. Es legal y ético, no opcional.


---

## 📊 Framework de Auditoría

### Estructura del Reporte

```markdown
# Auditoría Web — [Sitio]
**Fecha**: YYYY-MM-DD
**URL**: https://example.com
**Auditor**: LMAgent SEO Auditor v2.3

## Resumen Ejecutivo
| Categoría | Score | Estado |
|-----------|-------|--------|
| SEO On-Page | 85/100 | ⚠️ |
| Performance | 72/100 | ❌ |
| Accessibility | 91/100 | ✅ |
| Best Practices | 88/100 | ⚠️ |
| Structured Data | 60/100 | ❌ |

Read the full file on GitHub · 525 lines

Files

What ships with it

1 file 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.

references/seo-checklist.md 383 B

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.

2mo ago First seen · 525 lines · 45 tokens per session scan A e75d30dd795f

Subscribe to this mod's changes

seo-auditor is a skill published in the GitHub repository QuBiit0/lmagent (2 stars, last pushed 8mo ago), licensed MIT. It adds 45 tokens to every session and 4,345 once invoked, about $0.0002 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.

Marketing and SEO

seo-auditor next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
seo-auditorQuBiit0/lmagent	Skill	2	8mo ago	MIT	A	45	Claude Code
imagegenopenai/codex	Skill	133k	yesterday	Apache-2.0	A	113	Codex
playwright-climicrosoft/playwright	Skill	99k	yesterday	Apache-2.0	A	19	Claude Code
local-ai-agentsmicrosoft/ai-agents-for-beginners	Skill	79k	4d ago	MIT	A	200	Claude Code, Codex
systematic-debuggingobra/superpowers	Skill	313k	3d ago	MIT	A	21	Claude Code
next-cache-components-adoptionvercel/next.js	Skill	143k	today	MIT	A	95	Claude Code
next-partial-prefetching-adoptionvercel/next.js	Skill	143k	today	MIT	A	103	Claude Code

lmagent: Skill for Claude Code