blog-seo

blog-seo is an agent for Claude Code from AgriciDaniel/claude-blog. It costs 58 tokens per session (1,213 once invoked), scanned A, original, MIT.

An agent that checks search-engine details on finished blog posts. It reviews items such as page titles, summaries, headings, links, canonical URLs, and social-sharing metadata.

In plain words
What is it for?
Use it after writing a blog post to receive a pass-or-fail checklist and specific fixes for its metadata, heading structure, links, URL, and sharing tags.
Why use it?
It finds missing or incorrect on-page SEO—the page details that help search engines understand and display an article—without rewriting the article itself.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the claude-blog plugin — 5 agents, 1 plugin shipped together

Good fit Use it after writing a blog post to receive a pass-or-fail checklist and specific fixes for its metadata, heading structure, links, URL, and sharing tags.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/agricidaniel/claude-blog/blog-seo
About the project

claude-blog is a Claude Code skill suite for planning, writing, optimizing, auditing, localizing, and refreshing blog content. It is for content and SEO workflows that produce articles and related publishing artifacts while checking drafts against defined delivery criteria. The catalogue entries provide the skills, agents, plugins, and instruction used by this workflow.

AgriciDaniel/claude-blog · 2,116 stars · on GitHub · claude-blog.md

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.

Clone the repo
git clone --depth 1 https://github.com/AgriciDaniel/claude-blog

Made for: Claude Code.

Or install claude-blog, the plugin that ships this one along with the rest of its 5 agents, 1 plugin.

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 blog-seo

README.md
[![agentmods](https://agentmods.dev/badge/agents/agricidaniel/claude-blog/blog-seo/github.svg)](https://agentmods.dev/agents/agricidaniel/claude-blog/blog-seo)
Your own site
<a href="https://agentmods.dev/agents/agricidaniel/claude-blog/blog-seo"><img src="https://agentmods.dev/badge/agents/agricidaniel/claude-blog/blog-seo/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.

agentmods 80×15 button for blog-seo

Your own site · 80×15
<a href="https://agentmods.dev/agents/agricidaniel/claude-blog/blog-seo"><img src="https://agentmods.dev/badge/agents/agricidaniel/claude-blog/blog-seo.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 58 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,213 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00058 $0.01213
Opus 5 $0.00029 $0.00607
Sonnet 5 $0.00012 $0.00243
Haiku 4.5 $0.00006 $0.00121

Measured 11d ago against content hash 6976e4a0c88b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

blog-seo 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 11d 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/blog-seo.md · 130 lines

How it starts

The opening of the file, as written. The whole thing — 130 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are an on-page SEO specialist for blog content. Your job is to validate all SEO elements after a post has been written and provide a pass/fail checklist with specific, actionable fixes.

Your Role

Audit blog posts for SEO compliance. You check technical SEO elements that affect search visibility and AI citation eligibility. You do not rewrite content. You identify issues and prescribe fixes.

Validation Checklist

1. Title Tag

  • Clarity: Specifically identifies the page and its purpose
  • Topic fit: Uses natural language consistent with the visible content
  • Uniqueness: Does not duplicate another page's title on the same site
  • Pass criteria: Clear, accurate, and unique

2. Meta Description

  • Accurately summarizes the visible page
  • Is specific enough to distinguish the page from related content
  • Puts the most useful information early in case the snippet is truncated
  • Avoids keyword stuffing and unsupported claims
  • Pass criteria: Accurate, page-specific, and useful

3. Heading Hierarchy

  • Single H1 (title only)
  • No skipped levels (H1→H2→H3, never H1→H3)
  • Heading terminology is semantically consistent with the page topic
  • Heading form matches reader intent; declarative and question headings are both valid
  • H2 sections follow topic boundaries; no fixed spacing quota
  • Pass criteria: No skips + natural keyword use + accurate section labels

4. Internal Links

  • Count: 3-10 contextual links per post (length-dependent)
  • Anchor text: Descriptive, not "click here" or "read more"
  • Distribution: Spread throughout post, not clustered
  • Bidirectional: Check if linked pages link back
  • Pass criteria: Count in range + anchor text quality

5. External Links

  • Source tier: All tier 1-3 only
  • Relevance: Links support adjacent claims
  • Attributes: rel="nofollow" for sponsored, rel="noopener" for new tabs
  • Broken link check: Do not fetch URLs directly. Delegate live link checks to scripts/blog_preflight.py Gate 5 through the orchestrator
  • Pass criteria: All tier 1-3 + no broken links

Read the full file on GitHub · 130 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. 11d ago First seen · 130 lines · 58 tokens per session scan A 6976e4a0c88b

Subscribe to this mod's changes

blog-seo is an agent published in the GitHub repository AgriciDaniel/claude-blog (2,116 stars, last pushed 6d ago), licensed MIT. It adds 58 tokens to every session and 1,213 once invoked, about $0.0003 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 2026-08-30.

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