The open registry for OpenAI Codex CLI
Codex CLI Skills
Codex CLI skills are reusable SKILL.md instructions that extend OpenAI's Codex CLI with new capabilities. The same SKILL.md works in Claude Code, Cursor, Windsurf, and any MCP-compatible tool. Install with one command.
Why install skills in Codex CLI?
Codex CLI is a powerful agent runtime, but out of the box it has no knowledge of your team's conventions, your deployment targets, or the specific way you do code review. Skills fix that by encoding procedural knowledge as portable SKILL.md files.
Instead of writing the same prompts every time you start a Codex session, you install a skill once and Codex loads it on demand whenever the trigger matches the task. Your context window stays clean. Your workflows stay consistent across the team.
And because the SKILL.md format is open, the same skill that runs in Codex also runs in Claude Code, Cursor, Windsurf, and any MCP-compatible tool. No lock-in to one CLI.
Best Codex CLI skills
See all →01code-review
101 installsThorough code review — checks correctness, security, performance, readability, and test coverage. Gives actionable feedback ranked by severity.
Review02quickstart
28 installsZero to power user in one invoke — detects OS, installs Homebrew/apt/Node.js/Python, sets up Claude Code, authenticates skills-hub CLI, connects MCP servers, and installs recommended skills based on your project. Cross-platform (macOS, Linux, WSL). Idempotent. Use when: 'quickstart', 'setup machine', 'new machine setup', 'install everything', 'get started', 'onboard me', 'setup skills-hub', 'fresh install'.
Productivity03refactor
15 installsSystematic code refactoring — extract functions, reduce complexity, eliminate duplication, improve naming, and split large files. Preserves behavior with tests.
Review04Ralph Wiggum Ship It
10 installsStop overthinking. Ship the thing. The Ralph Wiggum approach to software delivery: naive boldness backed by the confidence that you can fix anything after it lands. For when your inner perfectionist needs to sit down.
Build05ci-cd
8 installsSet up CI/CD pipelines — generates GitHub Actions, GitLab CI, or Bitbucket Pipelines with lint, test, build, deploy stages. Detects stack automatically.
Deploy06Market Research to Launch
6 installsFull product launch pipeline. Competitive analysis, positioning, landing page SEO, schema markup, social media content, and pitch deck. From idea to launched and marketed.
Combo07security-audit
6 installsScan a codebase for security vulnerabilities — OWASP Top 10, secrets in code, dependency CVEs, auth flaws, injection risks, and misconfigurations. Fixes what it finds.
Review08social-media-content-automator
6 installsA comprehensive social media automation skill that monitors platforms like Reddit and other social media sites to generate, post, and reply with relevant content promoting your app. It ensures content relevance, adheres to platform policies, and incorporates best practices for engagement and safety.
Productivity09api-design
4 installsReview or design REST/GraphQL APIs — checks naming, versioning, pagination, error handling, authentication, rate limiting, and consistency against industry standards.
Review10humanizer
4 installsMulti-pass editor that removes AI-writing tells from drafted content — eliminates filler phrases, balances sentence length, restores opinion and voice, and strips em-dash overuse so posts sound human and opinionated rather than ChatGPT-generic. Use when the user wants to humanize AI-generated marketing copy, blog posts, landing pages, or social content.
Analysisfrom Skills Hub11ship-check
3 installsPre-deploy safety check — runs tests, security audit, performance check, and dependency audit in sequence. Catches issues before they hit production.
Combo12repo-health
3 installsRepository health dashboard — scores your repo on tests, docs, CI, dependencies, security, code quality, and contributor experience. Actionable scorecard with fixes.
Combo13debug
3 installsSystematic debugging agent — reproduce the issue, isolate the root cause, trace the code path, fix it, and add a regression test. Works with any stack.
QA14Legal Document Factory
3 installsGenerates and reviews a complete set of legal documents. NDAs, privacy policies, GDPR compliance, data processing agreements, and formatted legal documents ready for review.
Combo15session-memory
3 installsPersist, summarize, and reload agent context between sessions — writes a structured session log to CLAUDE.md / AGENTS.md / .hermes.md, snapshots decisions before destructive ops, and resumes long-running goals without re-briefing. Works with any coding agent.
Productivityfrom Skills Hub16Small Business in a Box
2 installsDigital infrastructure for a small business. Business model, privacy policy, GDPR compliance, financial model, marketing plan, SEO, email templates, and payment integration.
Combo17error-handling
2 installsAdd comprehensive error handling — try/catch, error boundaries, retry logic, user-facing error messages, and graceful degradation across the entire stack.
QA18bug-hunt
2 installsSystematic bug hunting — traces error reports through the code, reproduces with tests, identifies root cause, fixes, and adds regression guards. From report to resolution.
Combo
Installing a Codex CLI skill
# Install a single skill for Codex CLI
npx @skills-hub-ai/cli install code-review --target codex
# Install multiple skills (skill bundle)
npx @skills-hub-ai/cli install full-stack-dev-kit --target codex
# Verify the install
ls ~/.codex/skills/The CLI writes SKILL.md files to ~/.codex/skills/ globally or to .codex/skills/ in your project root if you pass --scope project. The lockfile .skills.json tracks every install for reproducibility.
Frequently asked questions about Codex CLI skills
What are Codex CLI skills?
Codex CLI skills are reusable SKILL.md instructions that extend OpenAI's Codex CLI with specialized capabilities, code review, generating tests, deployment automation, security scanning. They follow the open Agent Skills standard, so the same SKILL.md works in Codex, Claude Code, Cursor, Windsurf, and any MCP-compatible tool.
How do I install a skill in Codex CLI?
Run `npx @skills-hub-ai/cli install <skill-slug> --target codex`. The CLI writes the SKILL.md to your Codex skills directory and adds it to `.skills.json` so your team gets the same skills at the same versions.
Where does Codex CLI look for skills?
Codex CLI loads skills from the directory configured in your `codex.toml` (typically `~/.codex/skills/`) and from a `.codex/skills/` folder in your project root. The skills-hub CLI handles both locations automatically.
Are Codex skills compatible with Claude skills?
Yes, both follow the same Agent Skills standard. A skill written for Claude Code runs unchanged in Codex CLI. The CLI handles any tool-specific path conventions.