OpenAI Codex Skills
OpenAI Codex, OpenAI's coding agent, reads Agent Skills from its skills directory. SkillMD lists 25,790 safety-reviewed
skills (SKILL.md files) you can use in OpenAI Codex free: search by task, install with one command, or copy the file
into ./.codex/skills.
Install a skill in OpenAI Codex
- CLI (recommended). Install the CLI once, then add any skill to OpenAI Codex by slug:
npm i -g skillmds skillmd add <owner>/<name> -a codex # project scope → ./.codex/skills skillmd add <owner>/<name> -a codex -g # global scope → ~/.codex/skills - Manual copy. Open any skill on SkillMD, download its SKILL.md, and save it as
./.codex/skills/<skill-name>/SKILL.md(or~/.codex/skills/…for every project). - MCP server. If OpenAI Codex supports MCP servers, connect the SkillMD server and ask the agent to search and install skills for you. Setup details: MCP docs.
Machine-readable version of this guide: /agents/codex.txt
Top skills for OpenAI Codex
anthropic frontend-design
Guides distinctive, intentional visual design for new UI or existing interfaces, covering aesthetic direction, typography, and avoiding templated defaults.
158k · bundle
anthropic skill-creator
Create new skills, modify existing ones, and measure their performance through iterative evaluation and benchmarking.
158k · bundle
anthropic pptx
Create, read, edit, and convert PowerPoint (.pptx) files with design guidance and visual QA workflows.
158k · bundle
anthropic docx
Create, read, edit, and manipulate Word documents (.docx files) with formatting, tables, images, and tracked changes.
158k · bundle
anthropic xlsx
Create, edit, and analyze spreadsheet files (.xlsx, .xlsm, .csv, .tsv) with formulas, formatting, and financial modeling conventions.
158k · bundle
cloudflare-security-audit security-audit
Finds exploitable vulnerabilities in codebases through a structured multi-phase audit covering recon, hunting, validation, and reporting.
· bundle
anthropic web-artifacts-builder
Creates elaborate, multi-component HTML artifacts using React, Tailwind CSS, and shadcn/ui for complex frontend projects.
158k · bundle
anthropic theme-factory
Apply consistent, professional color palettes and font pairings to presentation slide decks and other artifacts using pre-set themes or custom on-the-fly generation.
158k · bundle
alirezarezvani caveman
Reduces token usage by ~75% by stripping filler words, articles, and pleasantries while preserving full technical accuracy. Activates on user commands like 'caveman mode' or 'be brief'.
20.4k · bundle
alirezarezvani code-reviewer
Automates code review for pull requests across 14+ languages, analyzing complexity, risk, code quality, and generating structured review reports.
20.4k · bundle
anthropic algorithmic-art
Create algorithmic art by first writing a generative philosophy, then expressing it as p5.js sketches with seeded randomness and interactive parameter exploration.
158k · bundle
anthropic canvas-design
Creates visual art in .png and .pdf documents by first generating a design philosophy and then expressing it on a canvas.
158k · bundle
alirezarezvani senior-backend
Designs and implements backend systems including REST APIs, microservices, database architectures, authentication flows, and security hardening. Covers Node.js/Express/Fastify development, PostgreSQL optimization, API security, and backend architecture patterns.
20.4k · bundle
alirezarezvani ship-gate
Scans a codebase for security, database, deployment, code quality, AI/LLM, dependency, frontend, and observability issues before deployment. Intercepts deploy commands and blocks until critical items pass.
20.4k · bundle
alirezarezvani aeo
Optimize content to be cited by AI language models (ChatGPT, Perplexity, Claude, Gemini, Mistral) as authoritative sources, distinct from traditional SEO.
20.4k · bundle
microsoft azure-ai
Integrate with Azure AI services including Search, Speech, OpenAI, and Document Intelligence for search, transcription, OCR, and text-to-speech tasks.
2.7k · bundle
alirezarezvani senior-frontend
Scaffold Next.js/React projects, generate components, analyze bundle sizes, and apply React/Next.js optimization patterns.
20.4k · bundle
google gemini-api
Guides usage of the Gemini API on Agent Platform with the Google Gen AI SDK, covering SDK usage (Python, JS/TS, Go, Java, C#), capabilities like multimodal inputs, tools, media generation, caching, batch prediction, and Live API.
14.4k · bundle
Frequently asked questions
Where does OpenAI Codex look for skills?
OpenAI Codex loads Agent Skills from ./.codex/skills inside a project and from ~/.codex/skills globally. Each skill lives in its own folder as <skill-name>/SKILL.md; the agent reads the skill's description and applies it when a request matches.
How do I install a skill in OpenAI Codex?
Run npm i -g skillmds once, then skillmd add <owner>/<name> -a codex in your project (add -g for global scope). The CLI writes the SKILL.md into .codex/skills for you. You can also copy the file by hand from any skill page on skillmd.com.
Do skills made for Claude Code work in OpenAI Codex?
Yes. SKILL.md is an open, agent-neutral format: the same file works across Claude Code, OpenAI Codex, Cursor, Codex, and 60+ other agents. Only the directory it lives in changes, and skillmd add -a codex handles that for you.