What Is This?

My AGENTS.md and SKILL.md files provide global agent behavior rules, reusable skills, and project-oriented presets for Node.js, Obsidian plugins, Swift, and SwiftUI for OpenAI Codex and compatible AI coding agents.

Contents

Path	Purpose
.codex/AGENTS.md	Global agent rules for careful reasoning, small changes, and verification.
.codex/create-update-architecture-md/SKILL.md	Skill for creating or updating ARCHITECTURE.md.
.codex/create-update-readme-md/SKILL.md	Skill for creating or updating README feature sections.
.codex/formatting-swiftui-code-style/SKILL.md	Skill for SwiftUI code formatting.
nodejs-project/AGENTS.md	Node.js / NodeJS preset.
obsidian-plugin-project/AGENTS.md	Obsidian plugin preset.
swift-project/AGENTS.md	Swift preset.
swiftui-project/AGENTS.md	SwiftUI preset.

How to use

For global Codex rules and reusable skills:

In_Your_OS_Your_Profile_Folder/
└── .codex/
    ├── AGENTS.md
    └── skills/
        ├── create-update-architecture-md/
        │   └── SKILL.md
        ├── create-update-readme-md/
        │   └── SKILL.md
        └── formatting-swiftui-code-style/
            └── SKILL.md

For project-specific behavior, copy the matching AGENTS.md into your project root folder, then edit it for your own project rules (if need it).

Self-tests

Use these prompts to confirm that the expected instructions are loaded.

Global agent

Prompt	Expected response
AGENTS GLOBAL-SELF TEST	GLOBAL_AGENTS_LOADED

Project agents

Project preset	Prompt	Expected response
Node.js	AGENTS PROJECT-SELF TEST	NODEJS_AGENTS_LOADED
Obsidian plugin	AGENTS PROJECT-SELF TEST	OBSIDIAN_DEV_AGENTS_LOADED
Swift	AGENTS PROJECT-SELF TEST	SWIFT_AGENTS_LOADED
SwiftUI	AGENTS PROJECT-SELF TEST	SWIFTUI_AGENTS_LOADED

Skills

Skill	Loaded marker
Create / update architecture document	SKILL_CR_UPD_ARCH_LOADED
Create / update README features	SKILL_CR_UPD_README_LOADED
SwiftUI code style	SKILL_SWIFTUI_CODE_STYLE_LOADED

Codex agent limits

Codex has limit (32 KiB by default) of the combined instruction-file size, look at the official Codex documentation for details: https://developers.openai.com/codex/guides/agents-md Pay attention at this parameter: project_doc_max_bytes

Credits

The global file .codex/AGENTS.md is effectively a 1:1 copy of CLAUDE.md by Andrei Karpathy. https://github.com/forrestchang/andrej-karpathy-skills/blob/main/CLAUDE.md?plain=1