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Openai Codex

Category: Security  ·  Sub-category: security-misc  ·  Last updated:
tool:gitlabai:openaitype:review
OpenAI Codex (CLI / IDE / cloud / ChatGPT desktop app) リファレンス。 GPT-6 系, Fast / Ultrafast mode, codex exec, スラッシュコマンド, prompting, AGENTS.md, rules, subagents, approvals, auto-review, sandbox, permission profiles, profiles, config.toml, 環境変数, roles, MCP 設定, GitHub Action, Codex SDK, App Server (JSON-RPC), Agents SDK 連携, Codex skills (.agents/skills), plugins, scheduled tasks, Browser, Computer Use, cloud / local / worktree 環境, git worktrees, Record & Replay, cloud 委譲, GitHub / GitLab / Linear / Slack 連携, administration, provisioning, analytics API, compliance API, LLM gateway, Codex Security 脆弱性スキャン (SARIF), deep scan, triage, findings, threat model, security hardening。
Security AStatic scan found no risk patternsHow grading works ›

From the source SKILL.md

OpenAI Codex — codex CLI / IDE 拡張 / ChatGPT desktop app（公式表記は Codex in the ChatGPT desktop app）/ cloud からなる OpenAI 公式のコーディングエージェント製品。 対象は learn.chatgpt.com/docs の取得日 2026-10-16 時点（URL に版なし。対象モデル世代は GPT-6 系: gpt-6-astra / gpt-6.1-sol / gpt-6-sol / gpt-6-luna）。 CLI・IDE・desktop app・cloud への導入、CLI / IDE / desktop app のコマンドと設定、AGENTS.md/rules/subagents/memories によるエージェント設定、 Fast / Ultrafast mode、config.toml/MCP 設定、approvals・sandbox・GitHub Action・Codex SDK・App Server による自動化、 plugins・Codex skills 作成・scheduled tasks・Browser・Computer Use・web search による拡張、 ワークスペース administration（LLM gateway・service…

What this skill does

Openai Codex is a community-contributed Claude Code skill in the security-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/openai-codex/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Openai Codex Claude Code skill is built for security engineers, penetration testers, DevSecOps practitioners, and development teams hardening codebases and infrastructure. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 211,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/openai-codex
curl -L https://claudskills.com/skills/openai-codex/SKILL.md \
  -o ~/.claude/skills/openai-codex/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/openai-codex/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/openai-codex/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\openai-codex\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Telegram

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Openai Codex Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/openai-codex/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.
What does the Openai Codex skill do?
OpenAI Codex (CLI / IDE / cloud / ChatGPT desktop app) リファレンス。 GPT-6 系, Fast / Ultrafast mode, codex exec, スラッシュコマンド, prompting, AGENTS.md, rules, subagents, approvals, auto-review, sandbox, permission profiles, profiles, config.toml, 環境変数, roles, MCP 設定, GitHub Action, Codex SDK, App Server (JSON-RPC), Agents SDK 連携, Codex skills (.agents/skills), plugins, scheduled tasks, Browser, Computer Use, cloud / local / worktree 環境, git worktrees, Record & Replay, cloud 委譲, GitHub / GitLab / Linear / Slack 連携, administration, provisioning, analytics API, compliance API, LLM gateway, Codex Security 脆弱性スキャン (SARIF), deep scan, triage, findings, threat model, security hardening。
Is this skill free to install?
Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.
When should I use the Openai Codex skill?
Use Openai Codex when your Claude Code task falls under the Security category — specifically in the security misc area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Openai Codex" or describe the task and let Claude pick). Browse related skills at /category/security/.
What is a Claude Code skill and how does the Openai Codex skill fit in?
A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Openai Codex is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Security category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA
Fandhe-AI. (2026). Openai Codex [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/openai-codex/
BibTeX
@misc{openai-codex-2026,
  author    = {Fandhe-AI},
  title     = {Openai Codex [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/openai-codex/}
}

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Security scan

Grade A · scanned 2026-10-25 — free static scan against the OWASP Agentic Skills Top 10.

No risk patterns were found in any of the ten OWASP-aligned categories. How grading works ›

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[![Security: A](https://img.shields.io/badge/Security-A-2e7d32)](https://claudskills.com/skills/openai-codex/#security)

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Browse all Security skills in the ClaudSkills registry, or explore these other picks from the same category:

Browse all Security skills → Top 100 skills
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