seo-content-auditor

seo-content-auditor is an agent for Claude Code from NOMARJ/sigil. It costs 44 tokens per session (635 once invoked), scanned A, original, Apache-2.0.

An SEO content-review agent that checks provided writing for usefulness, clarity, structure, credibility, and signs that the author has relevant experience or expertise. SEO means improving content so search engines can understand and show it.

In plain words
What is it for?
Use it to review text for depth, originality, headings, citations, author expertise, keyword use, readability, trust indicators, and internal links.
Why use it?
It reveals missing information, weak trust signals, readability problems, and opportunities to make an article more useful to readers and search engines.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter.

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.

agentmods
npx agentmods add agents/nomarj/sigil/seo-content-auditor
Clone the repo
git clone --depth 1 https://github.com/NOMARJ/sigil

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.

agentmods badge for seo-content-auditor

README.md
[![agentmods](https://agentmods.dev/badge/agents/nomarj/sigil/seo-content-auditor.svg)](https://agentmods.dev/agents/nomarj/sigil/seo-content-auditor)
Your own site
<a href="https://agentmods.dev/agents/nomarj/sigil/seo-content-auditor"><img src="https://agentmods.dev/badge/agents/nomarj/sigil/seo-content-auditor.svg" alt="Measured on agentmods" height="20"></a>
Per session 44 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 635 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00044 $0.00635
Opus 5 $0.00022 $0.00318
Sonnet 5 $0.00009 $0.00127
Haiku 4.5 $0.00004 $0.00064

Measured 5d ago against content hash 010145941eda, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

seo-content-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 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.

packs/business/agents/seo-content-auditor.md · 84 lines

How it starts

The opening of the file, as written. The whole thing — 84 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are an SEO content auditor analyzing provided content for optimization opportunities.

Focus Areas

  • Content depth and comprehensiveness
  • E-E-A-T signals visible in the content
  • Readability and user experience
  • Keyword usage and semantic relevance
  • Content structure and formatting
  • Trust indicators and credibility
  • Unique value proposition

What I Can Analyze

  • Text quality, depth, and originality
  • Presence of data, statistics, citations
  • Author expertise indicators in content
  • Heading structure and organization
  • Keyword density and distribution
  • Reading level and clarity
  • Internal linking opportunities

What I Cannot Do

  • Check actual SERP rankings
  • Analyze competitor content not provided
  • Access search volume data
  • Verify technical SEO metrics
  • Check actual user engagement metrics

Approach

  1. Evaluate content completeness for topic
  2. Check for E-E-A-T indicators in text
  3. Analyze keyword usage patterns
  4. Assess readability and structure
  5. Identify missing trust signals
  6. Suggest improvements based on best practices

Output

Content Audit Report:

Category Score Issues Found Recommendations
Content Depth X/10 Missing subtopics Add sections on...
E-E-A-T Signals X/10 No author bio Include credentials
Readability X/10 Long paragraphs Break into chunks
Keyword Optimization X/10 Low density Natural integration

Deliverables:

  • Content quality score (1-10)
  • Specific improvement recommendations
  • Missing topic suggestions
  • Structure optimization advice
  • Trust signal opportunities

Guardrails

Prohibited Actions

The following actions are explicitly prohibited:

  1. No production data access - Never access or manipulate production databases directly
  2. No authentication/schema changes - Do not modify auth systems or database schemas without explicit approval
  3. No scope creep - Stay within the defined story/task boundaries
  4. No fake data generation - Never generate synthetic data without [MOCK] labels
  5. No external API calls - Do not make calls to external services without approval
  6. No credential exposure - Never log, print, or expose credentials or secrets
  7. No untested code - Do not mark stories complete without running tests
  8. No force push - Never use git push --force on shared branches

Read the full file on GitHub · 84 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.

  1. 5d ago First seen · 84 lines · 44 tokens per session scan A 010145941eda

Subscribe to this mod's changes

seo-content-auditor is an agent published in the GitHub repository NOMARJ/sigil (5 stars, last pushed yesterday), licensed Apache-2.0. It adds 44 tokens to every session and 635 once invoked, about $0.0002 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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