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
658 installsThorough code review — checks correctness, security, performance, readability, and test coverage. Gives actionable feedback ranked by severity.
Review02refactor
111 installsSystematic code refactoring — extract functions, reduce complexity, eliminate duplication, improve naming, and split large files. Preserves behavior with tests.
Review03quickstart
81 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..
Productivity04humanizer
52 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..
Analysisfrom Skills Hub05security-audit
48 installsScan a codebase for security vulnerabilities — OWASP Top 10, secrets in code, dependency CVEs, auth flaws, injection risks, and misconfigurations. Fixes what it finds.
Review06debug
30 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.
QA07universal-subtitle-translator
24 installsTranslate subtitle (.srt) files between any languages using high-speed chunk-bundling and deep-translator. Trigger this skill whenever the user asks to translate subtitle files, .srt files, or video captions to any language — whether it's English to Spanish, Japanese to French, Arabic to Portuguese, or any other combination. Use this skill even if the user just says "translate my subtitles" or "convert these captions."
Build08session-memory
21 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 Hub09ci-cd
21 installsSet up CI/CD pipelines — generates GitHub Actions, GitLab CI, or Bitbucket Pipelines with lint, test, build, deploy stages. Detects stack automatically.
Deploy10Market Research to Launch
13 installsFull product launch pipeline. Competitive analysis, positioning, landing page SEO, schema markup, social media content, and pitch deck. From idea to launched and marketed.
Combo11vedic-astrology
13 installsCompute and interpret Vedic (Jyotisha) birth charts using Swiss Ephemeris. Use this skill whenever the user mentions Vedic astrology, Jyotish, kundli, birth chart, navamsa, dasha, lagna, nakshatra, horoscope, or yogas — and whenever they ask a life-direction question that needs a chart. The skill auto-detects which of 14 life dimensions a question falls into: career, wealth/money, marriage, children/fertility, health, education, property, relationships/love, family/parents, travel/foreign, spirituality, obstacles/misfortune, deep karma/past-life, and life timing. So trigger on "when will I marry", "is this a good time for a career change", "any accident risk in my chart", "best city for my career", "will I have children", "why does everything go wrong", "what is my past-life karma", "what's my current dasha" — even when the user never says the word "astrology". The skill handles geocoding, historical timezone resolution, all 14+ divisional charts, Vimshottari dasha, shadbala, ashtakava
Build12Ralph Wiggum Ship It
13 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.
Build13social-media-content-automator
10 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.
Productivity14api-design
10 installsReview or design REST/GraphQL APIs — checks naming, versioning, pagination, error handling, authentication, rate limiting, and consistency against industry standards.
Review15env-check
9 installsVerify your development environment is correctly configured for a project — checks runtime versions, dependencies, env vars, services, ports, and permissions.
Productivity16onboard
9 installsRead an unfamiliar codebase and produce a developer onboarding guide — architecture overview, key files, setup steps, common tasks, and gotchas.
Docs17test-gen
8 installsGenerate comprehensive tests for existing code — unit, integration, and edge cases. Detects framework, matches project conventions, and achieves meaningful coverage.
Test18rate-limiting
8 installsAdd rate limiting to APIs — configure per-user and per-IP limits, sliding window algorithms, tiered quotas, retry-after headers, and progressive abuse detection.
Ops
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.