Claude.ai skills, plugins, subagents, slash commands and mcp servers

frontend-design official anthropics skill This skill guides intentional visual design for new interfaces and redesigns. Use it when a generic generated UI is not enough. Claude Code 1,025,790installs skill-creator official anthropics skill Creates and refines skills, then tests them with prompts, evaluations, and performance checks. Claude Code 414,180installs pptx official anthropics skill This skill helps create, read, and edit .pptx files and .potx templates. Use it when building a deck or extracting slide text. Claude Code 241,433installs pdf official anthropics skill This skill lets an agent read, create, and edit PDF files, including forms and scanned documents. Use it when PDF work is part of the task. Claude Code 216,041installs docx official anthropics skill This skill creates, reads, and edits Word documents and templates. Use it for reports, letters, and files that need headings, tables, or page numbers. Claude Code 206,304installs xlsx official anthropics skill Creates, reads, edits, and converts spreadsheet files. Use it when the requested deliverable is an Excel workbook or another tabular file. Claude Code 187,223installs webapp-testing official anthropics skill This skill tests local web apps with Playwright, helping agents debug UI behavior, capture screenshots, and inspect browser logs. Claude Code 186,758installs mcp-builder official anthropics skill This skill walks through building an MCP server in TypeScript or Python, from reading the protocol spec to writing tests and evaluation questions. Claude Code 130,949installs canvas-design official anthropics skill Builds posters and visual art in .png and .pdf by first writing a design philosophy, then expressing it on the canvas. Claude Code 121,543installs web-artifacts-builder official anthropics skill This skill builds complex claude.ai HTML artifacts with React, Tailwind CSS, and shadcn/ui. Use it for interfaces with state or routing. Claude Code 112,122installs brand-guidelines official anthropics skill Applies Anthropic's official brand colors and fonts to documents, slides and other artifacts. Useful whenever something needs to match the company look. Claude Code 109,043installs theme-factory official anthropics skill Applies preset color palettes and font pairs to slides, documents, and HTML pages. Use it when an artifact needs one consistent visual style. Claude Code 94,921installs doc-coauthoring official anthropics skill Guides document drafting through context collection, section work, and a reader check. Use it for specs, RFCs, proposals, and decision documents. Claude Code 93,900installs algorithmic-art official anthropics skill Creates p5.js generative art with seeded randomness and adjustable parameters. Use it for flow fields, particle systems, and code-based visual experiments. Claude Code 89,081installs internal-comms official anthropics skill internal-comms helps Claude write internal communications in the formats your company uses, from status reports to FAQs and incident reports. Claude Code 79,929installs slack-gif-creator official anthropics skill This skill helps create animated GIFs for Slack and check their parameters. Use it for custom emoji or GIFs shared in messages. Claude Code 75,256installs discernment-nudge official anthropics skill Adds follow-up questions that test facts, reasoning, and missing context after answers a user may act on. Use it for advice, plans, estimates, and other consequential drafts. Claude Code 12,227installs academy-guide official anthropics skill Matches Claude learning questions with relevant Claude Academy materials. Use it for onboarding, feature training, and team education requests. Claude Code 11,893installs discernment-nudge official anthropics plugin This plugin adds two or three short follow-up questions after a substantive answer. Use it to check facts, probe reasoning, and spot missing context. Claude Code ★ 183,434repo stars academy-guide official anthropics plugin Recommends Claude Academy courses, tutorials, and use cases when you ask how to use Claude. It suits people learning Claude features through real tasks. Claude Code ★ 183,434repo stars claude-api official anthropics plugin This plugin adds Claude API and SDK guidance for building LLM-powered applications. Install it when your project needs a Claude integration. Claude Code ★ 183,434repo stars example-skills official anthropics plugin A collection of Claude skill examples for web testing, MCP work, design and documents. Use it to inspect skill structure or start a custom skill from a template. Claude Code ★ 183,434repo stars document-skills official anthropics plugin Adds Claude Code skills for creating and editing Word, Excel, PowerPoint, and PDF files. Install it when your agent needs to handle office documents. Claude Code ★ 183,434repo stars