88 /100
A primary coding-agent CLI; powerful, but its permissions need repository and shell boundaries.
Structured output 70/100
Whether the CLI can return JSON, YAML, or stable machine-readable output.
Non-interactive use 92/100
Whether common workflows can run predictably without an interactive prompt.
Safety boundaries 72/100
Whether read-only, dry-run, scoped auth, and destructive command boundaries are clear.
Install options
npm
$ npm install -g @openai/codex Common commands
Start Codex · requires review
$ codex Launches an interactive coding agent session.
Run with a prompt · requires review
$ codex "review the current diff" Runs a focused coding task in the terminal.
Agent usage examples
Human developer
Give Codex a narrow repo task, then inspect the diff and verification results before committing. Safety notes
- Review file edits and shell commands before approving high-impact changes.
- Use repository instructions and scoped worktrees to keep changes bounded.
- Avoid giving unrestricted deploy, billing, or production database access.
What agents can use it for
Codex CLI is itself an agent interface for repository work: code changes, reviews, test runs, and local automation.
Best fit
Use it when a developer wants terminal-native AI assistance with explicit repository context and verifiable diffs.