Official

Official skills

First-party skills straight from the source. Published and maintained by Anthropic and OpenAI, mirrored here with the full document and one-click install.

These are the skills the model builders ship themselves. Anthropic's document suite — pptx, docx, xlsx, pdf — and design skills like canvas-design and frontend-design are the reference implementations everyone else forks; OpenAI's set leans into Figma, deployment and repo workflows. Because they come straight from the source, they track the upstream repo, not a third-party re-upload that quietly goes stale.

Every official skill here carries its full SKILL.md and its auxiliary scripts, packaged exactly as the repo publishes them, and installs onto any of your agents in one click. When a skill needs a helper script to do its job — the way pptx leans on a Python thumbnail generator — that script comes with it, so it works the moment it lands.

Star counts are the real GitHub numbers; install counts are omitted rather than invented, because a first-party skill's authority comes from who published it, not from a usage number we could only estimate.

Anthropic official skills

View all Anthropic

Generate unique, reproducible algorithmic art with interactive parameter controls.

by Anthropic179.6k stars

Applies Anthropic's official brand colors and typography to any sort of artifact that may benefit from having Anthropic's look-and-feel. Use it when brand colors or style guidelines, visual formatting

by Anthropic179.6k stars

Generates original visual art pieces and poster designs as PNG or PDF files using a custom design philosophy.

by Anthropic179.6k stars

A structured workflow for writing documentation, proposals, and specs with an AI co-author.

by Anthropic179.6k stars

docx

Official

Generate, modify, and extract content from Word documents with full control over formatting, tables, and tracked changes.

by Anthropic179.6k stars

Guidance for distinctive, intentional visual design when building new UI or reshaping an existing one. Helps with aesthetic direction, typography, and making choices that don't read as templated defau

by Anthropic179.6k stars

A set of resources to help me write all kinds of internal communications, using the formats that my company likes to use. Claude should use this skill whenever asked to write some sort of internal com

by Anthropic179.6k stars

mcp-builder

Official

Step-by-step guide for building production-ready MCP servers that let LLMs interact with external services.

by Anthropic179.6k stars

pdf

Official

Read, extract, merge, split, rotate, watermark, and create PDF files using Python and command-line tools.

by Anthropic179.6k stars

OpenAI official skills

View all OpenAI

aspnet-core

Official

Get current, official guidance for building, reviewing, and refactoring ASP.NET Core web applications.

by OpenAI27.9k stars

chatgpt-apps

Official

Scaffold production-ready ChatGPT Apps with MCP server and widget UI, guided by current official docs.

by OpenAI27.9k stars

cli-creator

Official

Generates a reusable, installable CLI from API docs, an OpenAPI spec, or existing scripts.

by OpenAI27.9k stars

Deploy applications and infrastructure to Cloudflare using Workers, Pages, and related platform services. Use when the user asks to deploy, host, publish, or set up a project on Cloudflare.

by OpenAI27.9k stars

define-goal

Official

Shapes fuzzy intentions into measurable objectives with clear success criteria and verification evidence.

by OpenAI27.9k stars

figma

Official

Use the Figma MCP server to fetch design context, screenshots, variables, and assets from Figma, and to translate Figma nodes into production code. Trigger when a task involves Figma URLs, node IDs, d

by OpenAI27.9k stars

Generates project-specific design system rules that guide AI agents to implement Figma designs consistently with your codebase conventions.

by OpenAI27.9k stars

Create a new blank Figma file. Use when the user wants to create a new Figma design or FigJam file, or when you need a new file before calling use_figma. Handles plan resolution via whoami if needed.

by OpenAI27.9k stars