agentmods.dev

oh-my-codex: Instructions file for Codex

AGENTS.md

oh-my-codex AGENTS.md is an instructions file for Codex, OpenCode from junghwaYang/oh-my-codex. It costs 622 tokens per session, scanned C, original, MIT.

Instructions for Oh My Codex, a tool that coordinates multiple AI coding assistants using modes such as planning, parallel work, test-first development, and code review.

In plain words
What is it for?
Use them when running orchestrated coding tasks, planning a project, working on several tasks at once, writing tests before code, or reviewing changes.
Why use it?
They give the tool a consistent way to split work, choose specialist roles, and follow the requested working mode.

Instructions file for CodexOpenCode

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

This is junghwaYang/oh-my-codex's own configuration. It tells Codex and OpenCode how to work on oh-my-codex 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 oh-my-codex configures →

not rated 5repo 8mo ago C scan 622 tokens original MIT
View source ↗ junghwaYang/oh-my-codex
Reuse

Borrowing it

Nothing to install: this file belongs to junghwaYang/oh-my-codex. 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/junghwaYang/oh-my-codex/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/junghwaYang/oh-my-codex

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.

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README.md
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Your own site
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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.

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<a href="https://agentmods.dev/instructions/junghwayang/oh-my-codex/agents-md"><img src="https://agentmods.dev/badge/instructions/junghwayang/oh-my-codex/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 622 This file is loaded in full into every session.
When invoked 622 The same file — it is already loaded in full.
Security scan C 1 finding. 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 $0.00622 $0.00622
Opus 5.5 $0.00249 $0.00249
Sonnet 5.5 $0.00124 $0.00124
Haiku 4.5 $0.00062 $0.00062

Measured 2mo ago against content hash 947b80d9264f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade C, and why

oh-my-codex AGENTS.md scanned grade C with 1 finding 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.

Hidden instructionshighPrompt injection

Directives inside HTML comments, invisible characters or bidirectional overrides are read by the model and not by the person reviewing the file.

<!-- Your custom instructions here -->
AGENTS.md · 85 lines

How it starts

The opening of the file, as written. The whole thing — 85 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md - Oh My Codex

This file is automatically loaded by Codex CLI and defines how the multi-agent orchestration works.

Quick Start

Use mode keywords to activate different execution strategies:

Keyword Mode Description
autopilot: Full orchestration PM → Architect → Specialists → QA
ulw: / ultrawork: Parallel execution Decompose & run in parallel
plan: Planning only Generate detailed plan without execution
eco: Token-efficient Use smaller model for simple tasks
ralph: Never give up Maximum effort with retries
tdd: Test-driven Write tests first, then implement
review: Code review Analyze and suggest improvements

Examples

# Full orchestration
omx "autopilot: build a REST API for user management"

# Parallel execution
omx "ulw: refactor all utility functions"

# Planning only
omx "plan: design a microservices architecture"

# Quick fix (token-efficient)
omx "eco: fix the typo in README"

Agent Roles

When using orchestrated modes, Oh My Codex deploys specialized agents:

Core Agents

  • PM (Project Manager) - Coordinates workflow, tracks progress
  • Architect - Designs system structure and patterns
  • Executor - Implements code changes

Specialists

  • Frontend - React, Vue, CSS, UI/UX
  • Backend - APIs, databases, server logic
  • DevOps - CI/CD, deployment, infrastructure
  • QA - Testing, validation, quality assurance

Support

  • Analyst - Requirements analysis, documentation
  • Researcher - Investigation, best practices
  • Debugger - Error diagnosis, fixes

Model Routing

Tasks are automatically routed to appropriate models:

Complexity Model Use Case
Real-time gpt-5.3-codex-spark Simple queries, 1000+ tok/s
Simple gpt-5-codex-mini Quick fixes, eco mode
Standard gpt-5.2-codex Default, balanced
Complex gpt-5.3-codex Autopilot, architecture
Maximum gpt-5.1-codex-max Ralph, long-running tasks

Read the full file on GitHub · 85 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 · 85 lines · 622 tokens per session scan C 947b80d9264f

Subscribe to this mod's changes

oh-my-codex AGENTS.md is an instructions file published in the GitHub repository junghwaYang/oh-my-codex (5 stars, last pushed 8mo ago), licensed MIT. It adds 622 tokens to every session, about $0.0025 per session on Opus 5.5. A static security scan graded it C with 1 finding (hidden instructions). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Building agentsPlanning
Related

oh-my-codex AGENTS.md compared with instructions from other repositories

oh-my-codex AGENTS.md next to 6 instructions from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
oh-my-codex AGENTS.mdjunghwaYang/oh-my-codexInstructions file58mo agoMITC622Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA9,719GitHub Copilot
next.js AGENTS.mdvercel/next.jsInstructions file143kyesterdayMITA7,461Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchainInstructions file149ktodayMITA4,680Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA5,516GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA3,093GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harnessInstructions file275k2d agoMITA4,313Codex, OpenCode