#Codex Cheatsheet

#Installation And Authentication

# Install CLI
npm install -g @openai/codex
codex --version
codex login

#CLI Subcommands

#Common Flags

#Slash Commands

Common commands: /status, /model, /approvals, /review, /goal.

#Permission Presets

Use read-only for review, workspace-write for normal local development, and broader access only in trusted environments.

#Models (2026)

Model availability changes. Check the current official docs and choose based on task complexity.

#Key config.toml Fields

model = "gpt-5.4"
reasoning_effort = "medium"
sandbox_mode = "workspace-write"
approval_policy = "on-request"

#Key Paths

#Useful One-Liners

# Safe local development
codex -c sandbox_mode=workspace-write -c approval_policy=on-request

# Read-only planning
codex -c sandbox_mode=read-only

# CI changelog draft
codex exec "Draft release notes from the commits since the last tag."