Where to Find the Codex Behavior Guide for AI Berkshire

The Codex behavior guide for AI Berkshire is documented in the repository's AGENTS.md file, which defines compatibility rules between Claude Code and Codex and outlines how Codex-generated skills should behave.

The AI Berkshire project maintains a structured approach to AI agent compatibility within the xbtlin/ai-berkshire repository. If you are looking for the Codex behavior guide for AI Berkshire, the canonical documentation resides in a specific markdown file at the repository root. This guide ensures that skills work consistently across both Claude Code and Codex environments.

Primary Location: AGENTS.md

The definitive Codex behavior guide for AI Berkshire lives in AGENTS.md at the repository root (view on GitHub). According to the xbtlin/ai-berkshire source code, this file establishes the compatibility framework between Claude Code and Codex, documents how Codex-only skills are generated, and specifies the expected behavior for Codex-generated implementations.

Codex Adapter Notes in Skill Definitions

Individual skill implementations reference the behavior guide through "Codex adapter note" sections. These notes appear in each codex-skills/*/SKILL.md file and link the specific implementation back to the canonical workflow defined in AGENTS.md.

Example from codex-skills/wechat-article/SKILL.md:

## Codex adapter note

This skill is generated from `skills/wechat-article.md` so Claude Code and Codex users share one canonical workflow.

Prompt Files and Skill Invocation

The codex-prompts/ directory contains files that invoke these skills and rely on the behavior definitions in AGENTS.md. For example, codex-prompts/wechat-article.md references the installed skill and assumes the underlying behavior standards defined in the guide.

Example prompt reference:

Use the installed AI Berkshire Codex skill `wechat-article` for this request.

Key Files Supporting the Codex Behavior Guide

Several file types comprise the complete behavior guide ecosystem:

• AGENTS.md – The primary Codex behavior guide containing compatibility rules and skill generation notes.
• codex-skills/*/SKILL.md – Individual skill definitions that include Codex adapter notes referencing the guide.
• codex-prompts/*.md – Prompt files that invoke Codex skills and depend on the behavior standards outlined in AGENTS.md.

Summary

• The Codex behavior guide for AI Berkshire is located in AGENTS.md at the repository root.
• Individual skills in codex-skills/*/SKILL.md contain adapter notes linking to the canonical guide.
• Prompt files in codex-prompts/ rely on the behavior standards defined in AGENTS.md.
• The guide ensures compatibility between Claude Code and Codex implementations.

Frequently Asked Questions

What is the main file for the Codex behavior guide in AI Berkshire?

The primary file is AGENTS.md in the repository root. This markdown document contains the complete compatibility rules between Claude Code and Codex, explains how Codex-only skills are generated, and outlines expected behaviors for AI-generated skills.

Where can I find examples of Codex skills that follow the behavior guide?

Look in the codex-skills/ directory. Each subdirectory contains a SKILL.md file with a "Codex adapter note" section that references the behavior guide and explains how the skill was generated from the canonical source.

How do prompt files reference the Codex behavior guide?

Files in codex-prompts/ (such as wechat-article.md) invoke skills by name and assume the behavior standards defined in AGENTS.md. They do not duplicate the behavior rules but rely on the guide to ensure consistent execution across different AI agents.

Is the Codex behavior guide specific to Codex only, or does it cover Claude Code too?

The guide covers both. According to the source code in AGENTS.md, the documentation defines compatibility rules between Claude Code and Codex, ensuring that skills generated for Codex maintain consistency with the canonical workflows used by Claude Code.

{
  "mcpServers": {
    "instagit": {
      "command": "npx",
      "args": ["-y", "instagit@latest"]
    }
  }
}