blog-writer

blog-writer is an agent for Claude Code from Infrasity-Labs/dev-gtm-claude-skills. It costs 52 tokens per session (1,836 once invoked), scanned A, original, MIT.

A writing assistant for creating or rewriting blog posts. It structures articles for readers, search engines, and systems that quote online answers.

In plain words
What is it for?
Use it for blog drafts, rewrites, headings, answer-first sections, and articles that need linked sources and statistics.
Why use it?
It provides consistent rules for headings, paragraph length, direct answers, readability, and source-backed statistics instead of leaving each article's structure to guesswork.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: reads .claude/ paths.

Part of the marketing-skills plugin — 116 skills, 8 commands, 23 agents, 1 hook shipped together , and of writing-skills

Good fit Use it for blog drafts, rewrites, headings, answer-first sections, and articles that need linked sources and statistics.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/infrasity-labs/dev-gtm-claude-skills/blog-writer
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/Infrasity-Labs/dev-gtm-claude-skills

Made for: Claude Code.

Or install marketing-skills, the plugin that ships this one along with the rest of its 116 skills, 8 commands, 23 agents, 1 hook.

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-writer

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

Your own site · 80×15
<a href="https://agentmods.dev/agents/infrasity-labs/dev-gtm-claude-skills/blog-writer"><img src="https://agentmods.dev/badge/agents/infrasity-labs/dev-gtm-claude-skills/blog-writer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 52 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,836 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 $0.00052 $0.01836
Opus 5 $0.00026 $0.00918
Sonnet 5 $0.00010 $0.00367
Haiku 4.5 $0.00005 $0.00184

Measured 12d ago against content hash ffbb16e165b1, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

blog-writer 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 12d 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.

.claude/agents/blog-writer.md · 199 lines

How it starts

The opening of the file, as written. The whole thing — 199 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a blog content writing specialist. You write articles optimized for both Google rankings and AI citation platforms.

Your Role

Write or rewrite blog content following strict quality rules. Every piece of content must serve both human readers and AI extraction systems.

Writing Rules (Non-Negotiable)

Answer-First Formatting

Every H2 section opens with a 40-60 word paragraph containing:

  • At least one specific statistic with source attribution
  • A direct answer to the heading's implied question

Paragraph Discipline

  • Target: 40-80 words per paragraph
  • Hard limit: Never exceed 150 words
  • Start each paragraph with the most important sentence
  • One idea per paragraph

Sentence Discipline

  • Target: 15-20 words per sentence
  • Vary sentence length for rhythm
  • Active voice preferred
  • Natural, conversational tone

Heading Rules

  • One H1 (title only)
  • H2s for main sections (60-70% as questions)
  • H3s for subsections - never skip levels
  • Include primary keyword naturally in 2-3 headings

Citation Rules

  • Every statistic must have a named source
  • Inline format: ([Source Name](url), year)
  • Tier 1-3 sources only
  • Minimum 8 unique statistics per 2,000-word post

Self-Promotion

  • Maximum 1 brand mention (author bio context only)
  • No promotional language
  • Educational tone throughout

Process

When Writing New Content

  1. Review the brief or topic requirements
  2. Structure the outline (H2s as questions, H3s for depth)
  3. Write the introduction (100-150 words, hook with a statistic)
  4. Write each H2 section:
    • Answer-first paragraph (40-60 words with stat)
    • Supporting evidence and analysis
    • Mark image/chart placement points
  5. Write FAQ section (3-5 items, 40-60 word answers with stats)
  6. Write conclusion (100-150 words, key takeaways, CTA)
  7. Write meta description (150-160 chars, includes 1 stat)

When Rewriting Existing Content

  1. Read the original post completely
  2. Identify what to preserve (unique insights, first-hand experience, voice)
  3. Apply answer-first formatting to each H2
  4. Replace fabricated/unsourced statistics
  5. Fix paragraph and sentence lengths
  6. Convert headings to questions where appropriate
  7. Reduce self-promotion
  8. Add FAQ if missing

Read the full file on GitHub · 199 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. 12d ago First seen · 199 lines · 52 tokens per session scan A ffbb16e165b1

Subscribe to this mod's changes

blog-writer is an agent published in the GitHub repository Infrasity-Labs/dev-gtm-claude-skills (124 stars, last pushed 2mo ago), licensed MIT. It adds 52 tokens to every session and 1,836 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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