blog: Instructions file for Codex

AGENTS.md

blog AGENTS.md is an instructions file for Codex, OpenCode from axelfreeman/blog. It costs 1,421 tokens per session, scanned A, original, MIT.

A repository of Markdown articles for a personal website about AI agents, answer-engine optimisation, automation, and marketing.

In plain words
What is it for?
It helps coding agents create or edit articles that match the repository's format and publishing style.
Why use it?
It gives contributors clear rules for article structure, metadata, summaries, headings, and the site's writing conventions.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions Claude Code; mentions AGENTS.md; mentions Codex.

This is axelfreeman/blog's own configuration. It tells Codex and OpenCode how to work on blog itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything blog configures →

Reuse

Borrowing it

Nothing to install: this file belongs to axelfreeman/blog. 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/axelfreeman/blog/master/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/axelfreeman/blog

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.

agentmods badge for blog AGENTS.md

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

agentmods 80×15 button for blog AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/axelfreeman/blog/agents-md"><img src="https://agentmods.dev/badge/instructions/axelfreeman/blog/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 1,421 This file is loaded in full into every session.
When invoked 1,421 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.01421 $0.01421
Opus 5.5 $0.00568 $0.00568
Sonnet 5.5 $0.00284 $0.00284
Haiku 4.5 $0.00142 $0.00142

Measured 2mo ago against content hash f12818afa3ae, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

blog 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 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.md · 185 lines

How it starts

The opening of the file, as written. The whole thing — 185 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md — axelfreeman/blog

Instructions for AI agents (Claude Code, Codex, Hermes, etc.) working with this repository.


What This Repo Is

This is the blog articles repository for axelfreeman.com — Axel Freeman's personal site about AI agents, AEO, automation, and marketing. Every article is real experience, not recycled content. No fluff.

  • Default branch: master
  • License: MIT (see LICENSE)
  • Owner: @axelfreeman

Article Structure

Articles are plain Markdown (.md). Each follows this structure:

# Article Title<br><span style="...">Optional Subtitle</span>

Category  ·  Subcategory

    Article Title Repeated
(Optional Subtitle)

    Axel Freeman  ·  DATE  ·  X min read

        **Bold summary paragraph.** The key takeaway, 2-4 sentences.

    ## Section Heading

    Content paragraphs...

        ### Callout Box Title
        Callout content with key insight or actionable advice.

Key Conventions

  1. Title line — uses <br> for line breaks, for styled subtitles
  2. Category line — Category · Subcategory (e.g., AI Marketing · Opinion, AI Marketing · Content)
  3. Author line — Axel Freeman · DATE · X min read (indented with 4 spaces)
  4. Summary paragraph — bold, 2-4 sentences, indented with 8 spaces, captures the article's core argument
  5. Section headings — ## Heading (H2), no H1 after the title
  6. Callout boxes — ### Emoji Callout Title followed by content, indented
  7. Paragraphs — indented with 4 spaces
  8. Emphasis — bold for key phrases, sparing inline code for terms

Bilingual Convention

  • English articles: <slug>-en.md (e.g., claude-vs-hermes-marketing-en.md)
  • Russian articles: <slug>.md (e.g., claude-vs-hermes-marketing.md)

When creating a new article, always produce both versions. English is the primary public-facing version; Russian serves the RU-speaking audience on axelfreeman.ru.


Article Naming

Read the full file on GitHub · 185 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. 2mo ago First seen · 185 lines · 1,421 tokens per session scan A f12818afa3ae

Subscribe to this mod's changes

blog AGENTS.md is an instructions file published in the GitHub repository axelfreeman/blog (15 stars, last pushed 1mo ago), licensed MIT. It adds 1,421 tokens to every session, about $0.0057 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 2026-08-30.

Related

blog AGENTS.md compared with instructions from other repositories

blog AGENTS.md next to 6 instructions from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
blog AGENTS.mdaxelfreeman/blogInstructions file151mo agoMITA1,421Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA9,719GitHub Copilot
next.js AGENTS.mdvercel/next.jsInstructions file143ktodayMITA7,461Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA5,516GitHub Copilot
langchain AGENTS.mdlangchain-ai/langchainInstructions file149ktodayMITA4,680Codex, OpenCode
vscode copilot-instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA3,093GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harnessInstructions file275k3d agoMITA4,313Codex, OpenCode