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Local Codex

Delegates coding, refactoring, and review tasks to your locally installed OpenAI Codex CLI as a non-interactive sub-agent.

Dev & CodingIntermediate★ 1,323⑂ 212AI score 8/10Last updated: Aug 8, 2026

What it does

  • Auto-detects the codex CLI (desktop app, npm global, Homebrew, PATH fallback) and runs it non-interactively.
  • Wraps three standardized commands in a Python helper: exec (single task), review (code review, optionally uncommitted-only), and status.
  • Returns structured JSON (success, exit_code, elapsed_seconds, stdout, final_message) so Claude can chain the result into follow-up work.
  • Uses ChatGPT Pro OAuth from ~/.codex/auth.json and explicitly avoids API keys, keeping usage on the flat-rate subscription.
  • Exposes model, sandbox level (read-only, workspace-write, danger-full-access), and timeout as parameters.

Who it's for

  • Developers with a ChatGPT Pro subscription who want Codex and Claude to cross-check each other.
  • Anyone offloading repetitive refactors or reviews to a second agent without leaving their main session.
  • Teams that want automated review of uncommitted diffs before pushing.

Examples

  1. "Have codex review the uncommitted changes in this repo" → runs review /path/to/repo gpt-5.5 true 300 and summarizes the findings.
  2. "Ask codex to write a Python fibonacci function" → exec with workspace-write sandbox writes the file into the working directory.
  3. "Check the codex connection" → status reports the resolved CLI path and OAuth health.

· · · Install guide · · ·

Install in the Claude app (no terminal)
  1. Download the ZIP with the button below.
  2. In Claude, open Settings → Capabilities and turn on 'Code execution and file creation'. (one time)
  3. Go to Customize → Skills → + → 'Upload a skill' and upload the ZIP.
↓ Download ZIP
Install in Claude Code

Let Claude do it — paste this into Claude Code

Install the skill I found on Claude Skill Mart.
Copy the local-codex folder from the GitHub repo daymade/claude-code-skills into my ~/.claude/skills/local-codex/.
When it's done, tell me in one line what this skill can do.

Install with a command instead

git clone https://github.com/daymade/claude-code-skills.git /tmp/claude-code-skills && mkdir -p ~/.claude/skills && cp -r /tmp/claude-code-skills/local-codex ~/.claude/skills/

⚠ This is a third-party skill. Check the source repository before installing.

  1. Install the OpenAI Codex CLI first (Codex desktop app, npm i -g @openai/codex, or Homebrew).
  2. Run codex login in a terminal and complete the browser OAuth flow with your ChatGPT Pro account. Do not set OPENAI_API_KEY — that switches you to pay-per-use billing.
  3. Confirm Python 3 is available with python3 --version.
  4. Clone the repo: git clone https://github.com/daymade/claude-code-skills.git
  5. Copy the skill folder: mkdir -p ~/.claude/skills && cp -r claude-code-skills/local-codex ~/.claude/skills/
  6. Restart Claude Code and try asking "check codex status" to confirm the skill loads.
  7. Start with the read-only sandbox, use workspace-write only when files must change, and avoid danger-full-access unless strictly required.
View source on GitHub ↗License: MIT