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Codex CLI Automation

Run OpenAI Codex CLI headlessly for scripted, CI, and agent-driven coding tasks

Source Download skill
Repository
XiaomiMiMo/MiMo-Code
Stars
13,743
Licence
MIT
Files
3 files

What it does

This skill teaches an AI agent how to drive OpenAI's Codex command-line coding tool without a human at the keyboard. It covers building the right codex exec command, choosing sandbox and approval modes, writing prompts that avoid interactive questions, and producing machine-readable JSON output or structured results. Once installed, the agent can hand a repository task to Codex in a script or pipeline and read back the outcome.

Great for

  • Developers automating code changes, test fixing, or repo analysis with Codex in scripts or CI/CD
  • Teams running Codex inside Docker, Kubernetes, or remote servers as a worker in an agent pipeline
  • Windows users deciding between native PowerShell and WSL2 for Codex runs

Skip it if

  • Anyone who has not installed the codex binary or set up authentication; the skill tells the agent to stop and give install guidance in that case
  • Running the --yolo unrestricted mode on a normal developer machine or a runner holding secrets, SSH keys, cloud credentials or a Docker socket, because it disables approvals and sandboxing

Try asking

  • “Use Codex headlessly to analyse this repo for risks without modifying any files”
  • “Run codex exec in workspace-write mode to implement this ticket and fix the failing tests”
  • “Stream Codex JSONL events to a file while it refactors the API module in CI”
  • “Resume the last Codex session in this directory and finish the remaining fixes”
Step-by-step guide: how to use Codex CLI AutomationInstall, first run, examples, tips and FAQs

Install in 3 steps

  1. 1

    Download the skill

    The ZIP contains the 3 original files, the MIT licence and an attribution note.

    codex.zip
  2. 2

    Add it to your agent

    Claude Code (all projects)

    mkdir -p ~/.claude/skills && unzip codex.zip -d ~/.claude/skills/

    Claude Code / Agent SDK (this project only)

    mkdir -p .claude/skills && unzip codex.zip -d .claude/skills/

    Claude apps (web/desktop): Settings → Capabilities → Skills → Upload skill, and choose the ZIP.

  3. 3

    Ask for the task

    No special command needed — the agent reads the skill's description and loads it when your request matches. Try one of the prompts above.

Get better results

  • Keep the default sandbox at workspace-write and use read-only for analysis; only use --yolo inside a hardened, disposable container.
  • Inject CODEX_API_KEY only into the single codex exec process rather than exporting it globally.
  • Give Codex a clear task prompt and the autonomous-work instructions so it resolves ambiguity instead of stopping for input.

What's inside

  • references/recipes.md
  • references/windows.md
  • SKILL.md

Redistributed unmodified from XiaomiMiMo/MiMo-Code under the MIT licence. The assessment was drafted with AI from the skill's files on 2026-10-29. Skills can instruct your agent to run code — read SKILL.md and any scripts before installing.