Most people use AI just to chat. But with five official Anthropic skills, your AI stops "talking" and starts WORKING: it builds real presentations, cleans up your Excel sheets, generates and fills out PDFs, writes formatted Word documents, and even tests your web app and tells you what's broken. They're all free, official (made by Anthropic, the creators of Claude) and they install the same way: with a single command. Here you'll find the command and a ready-to-copy prompt for each one — without writing a single line of code.
npx skills add, in Cursor, Codex, Gemini CLI and other agents too.A skill is a folder of instructions your AI loads when it needs them, to do a specific task well and repeatably. Without skills, if you ask for a PowerPoint, the AI describes one or gives you loose text. With the pptx skill installed, it hands you the real .pptx file, with its slides, formatting and everything, ready to open.
The five you'll see here are official Anthropic skills (from the creators of Claude), they live in a single public repository with over 150 thousand stars on GitHub, and they all install with the same command: npx skills add. You don't need to learn anything technical.
The pptx skill kicks in whenever a PowerPoint file is involved: creating a presentation or pitch deck from scratch, reading and extracting the text from a .pptx someone sent you, or editing an existing one. You talk to it normally and it hands back the finished file.
npx skills add https://github.com/anthropics/skills --skill pptx
Use the pptx skill. Build an 8-slide presentation to pitch [your topic] to [your audience]. I want a cover, an agenda, the problem, the solution, 3 benefits, a use case and a closing with a call to action. Give it a clean, professional design, and hand me the .pptx file ready to open.
The xlsx skill comes in when a spreadsheet is the star (.xlsx, .xlsm, .csv): opening, reading or fixing an existing sheet (adding columns, calculating formulas, formatting, making charts, cleaning up messy data) or creating a new one from scratch or from other data.
npx skills add https://github.com/anthropics/skills --skill xlsx
Use the xlsx skill. Here's this file [attach your .csv or .xlsx]. Clean it up (remove empty rows and duplicates), normalize the dates and amounts, add a column with the total and a monthly summary, and make me a chart of the trend. Hand me the final .xlsx, tidy and formatted.
The docx skill is for creating, reading or editing Word documents (.docx): proposals, contracts, reports, letters — with real formatting: table of contents, headings, page numbering and consistent styles. It's not plain text; it's a finished professional document.
npx skills add https://github.com/anthropics/skills --skill docx
Use the docx skill. Draft me a business proposal for [your client] about [your service]. Structure it with a cover, table of contents, executive summary, scope, timeline, pricing and terms. Give it professional formatting with headings and page numbering, and hand me the .docx ready to send.
The pdf skill does almost everything you need with PDFs: reading and extracting text or tables, merging several into one, splitting them, rotating pages, watermarking them, creating new ones, filling out forms and even encrypting them. The tedious PDF stuff, automated.
npx skills add https://github.com/anthropics/skills --skill pdf
Use the pdf skill. Here are several PDFs [attach them]. Merge them into a single one in this order [tell it the order], extract the tables into a separate summary, and put a watermark that says "Confidential" on every page. Hand me the final PDF.
The fifth one doesn't generate documents: it reviews. The webapp-testing skill opens your web application as if it were a user, checks that the frontend works, debugs the interface's behavior, takes screenshots and reads the browser logs. It's your personal QA tester.
npx skills add https://github.com/anthropics/skills --skill webapp-testing
Use the webapp-testing skill. My app runs on http://localhost:3000. Test it like a real user: log in, register a test account, navigate the main screens, try the [your key flow] flow and tell me what breaks, what looks wrong and what fails in the console. Take screenshots of every step.
npx skills add command and it stays available forever. After that you just talk to your AI normally and it decides when to use it. Not using Claude Code? The same npx skills add works in Cursor, Codex, Gemini CLI and Windsurf.All five live in the official Anthropic repository. It also holds other useful skills (skill-creator to build your own, frontend-design, mcp-builder and more). It's public, free and one of the most popular on GitHub.
Official Anthropic repository with the skills for Claude: pptx, xlsx, docx, pdf, webapp-testing, skill-creator, frontend-design, mcp-builder and more. The Agent Skills standard (agentskills.io).
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