Top Codex Skills

Free

Curated and tested list of best Codex skills for every workflow

FreeFree tier

Type

Open Source

Company

Composio

Visit Website GitHub (40 stars)

About Top Codex Skills

Top Codex Skills is a curated list of the best skills for OpenAI Codex, tested with real use cases. The article reviews ten skills including remotion for video graphics, frontend-design for non-generic UI, composio-connect for app integration, agent-browser for web automation, grill-me for iterative planning, handoff for session continuity, excalidraw for diagramming, frontend-slides for slide decks, nano-banana-2 for image generation, and Record Replay for recording custom skills. It explains how skills work as simple text files that persist instructions across chats, and provides installation steps via npx commands. The resource is part of Composio's ecosystem, which offers a free tier for its integration platform.

Key Features

Remotion skill for video graphics and animations inside Codex

Frontend-design skill builds websites and UIs avoiding generic AI looks

Composio-connect integrates Codex with 1,000+ apps (Gmail, Slack, Notion)

Agent-browser lets Codex drive a real browser to navigate and scrape data

Grill-me interviews users one question at a time for better planning

Handoff saves chat as a document for continuation across sessions

Excalidraw turns documents into flowcharts and architecture diagrams

Frontend-slides generates presentation slides in code

Nano-banana-2 generates draft images and social thumbnails

Record Replay by Codex records tasks into reusable skills

Pros & Cons

Pros

Skills are plain text files — easy to read, edit, and share
Removes need to repeat prompts across chats; skills persist
Open-source skills like remotion are free to use
Real use cases tested; not just a generic list
Installation is simple via npx commands without coding
Works for creative, administrative, and coding workflows

Cons

Requires Codex platform (likely OpenAI Codex) to use
Some skills may require Node.js or other dependencies
List reflects personal testing; results may vary for others

Best For

Editing videos and creating motion graphics directly in CodexBuilding non-AI-slop websites and user interfacesConnecting Codex to external apps like Gmail, Slack, and Notion for automationAutomating web browsing tasks including form filling and data scrapingIterative project planning through step-by-step questioningSaving chat history to continue work with different models or sessionsCreating diagrams (flowcharts, architecture) from text descriptionsGenerating presentation slides from a brief

FAQ

What is a Codex skill?

A skill is a plain text file on your computer with instructions for Codex to follow. It allows Codex to perform tasks consistently across different chats without starting from scratch.

How do I install Codex skills?

Open Codex chat and paste the install command, e.g. 'npx skills add remotion - dev / skills'. Codex will handle the installation. Restart Codex after installation and verify with 'Please check if [skill] is installed'.

Are Codex skills free?

Many skills, such as remotion, are open-source and free to use. The Composio platform also offers a free tier with 20K tool calls per month.

What can I do with Codex skills?

Skills enable video editing, UI building, app integration (Gmail, Slack, Notion), web automation, diagramming, slide creation, image generation, and more. They are applicable to admin, creative, and coding work.