# Codex

> Delegate tasks to OpenAI Codex CLI in read-only sandbox mode. Use when the user explicitly asks to use codex, or when you need a second opinion from another AI agent for coding, search, or general tasks.

- Skill: `him0/codex` (Agent Skill)
- Install (CLI): `npx skillmds@latest add him0/codex`
- Raw SKILL.md: https://api.skillmd.com/api/skills/him0/codex/raw
- Safety review: pending (external: skill-scanner PASS, skillspector CAUTION)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- Author: him0 (https://skillmd.com/u/him0)
- Updated: 2026-09-22
- Page: https://skillmd.com/skills/him0/codex

---


# Codex CLI

`codex` is the OpenAI Codex CLI agent.

## Usage

Always run codex in read-only sandbox (`-s read-only`) to prevent unintended file writes.

```bash
codex exec --color never -s read-only '<prompt>'
```