Codex
Use the local Codex CLI as an independent second agent.
Install
npx skills add dzhng/skills --skill codex -g -a claude-code -y- Repository
- dzhng/skills1.4k
- Category
- AI and agents
- Updated
- 3d ago
- License
- MIT
- Context cost
- Mediumabout 2,435 tokens
- Runs scripts
- No, instructions only
What it does
Use the local Codex CLI as an independent second agent. Two branches, (1) proactively run `codex review` for a second opinion after completing a substantive change, before presenting it as done or committing; (2) delegate a well-defined implementation task via `codex exec`, ONLY when the user explicitly asks for Codex to do it. Also covers how to prompt Codex.
Codex
Codex is an independent agent on PATH (codex, invoke as command codex if
a shell alias shadows it), sharing this working tree and already authenticated. It is a second opinion, not ground truth: verify what it
reports, own what it changes. It reads the same skills your repo carries.
Leave Codex's model at its CLI default unless the user asks for a specific
one. The default follows the current Codex release; do not pin a dated model
ID in this skill. If an explicit override is needed, verify it is current and
pass the requested model with -m <model>.
If codex is not installed
When codex is missing from PATH, offer to install it, ask the user for
approval first, never install on your own initiative. On yes, follow the
current instructions at https://developers.openai.com/codex/cli. First-run
authentication is interactive, hand that step to the user. Verify with
codex --version before proceeding.
Prompting Codex
Prompt Codex like an operator, not a collaborator: compact, block-structured
with XML tags. State the task, what "done" looks like, and the few constraints
that matter. A tighter prompt beats a bigger run, improve the contract before
raising --effort.
