algorithmic-art — js with seeded randomness and interactive parameter exploration.
book-to-skill — Converts books and documents (PDF, EPUB, DOCX, HTML, Markdown, plain text, RTF, MOBI/AZW with Calibre) into structured agent skills, extracting frameworks.
brand-guidelines — Applies Anthropic's official brand colors and typography to any sort of artifact that may benefit from having Anthropic's look-and-feel.
canvas-design — pdf documents using design philosophy. You should use this skill when the user asks to create a poster, piece of art, design, or other static piece.
claude-api — Reference for the Claude API / Anthropic SDK — model ids, pricing, params, streaming, tool use, MCP, agents, caching, token counting, model migration.
discernment-nudge — After you give a substantive answer or draft that the user may act on — advice or recommendations, drafted artifacts such as goals, plans, pitches, proposals.
doc-coauthoring — Guide users through a structured workflow for co-authoring documentation.
docx — dotx files). dotx', or requests to produce professional documents with formatting like tables of contents, headings, page numbers, or letterheads.
frontend-design — Guidance for distinctive, intentional visual design when building new UI or reshaping an existing one.
internal-comms — A set of resources to help me write all kinds of internal communications, using the formats that my company likes to use. ).
mcp-builder — Guide for creating high-quality MCP (Model Context Protocol) servers that enable LLMs to interact with external services through well-designed tools.
pdf — Use this skill whenever the user wants to do anything with PDF files.
pptx — potx file is involved in any way — as input, output, or both. potx), layouts, speaker notes, or comments.
prompt-engineer — Writes, refactors, and evaluates prompts for LLMs — generating optimized prompt templates, structured output schemas, evaluation rubrics, and test suites.
skill-creator — Create new skills, modify and improve existing skills, and measure skill performance.
slack-gif-creator — Knowledge and utilities for creating animated GIFs optimized for Slack. Provides constraints, validation tools, and animation concepts.
template-skill — Replace with description of the skill and when Claude should use it.
theme-factory — Toolkit for styling artifacts with a theme. These artifacts can be slides, docs, reportings, HTML landing pages, etc.
web-artifacts-builder — ai HTML artifacts using modern frontend web technologies (React, Tailwind CSS, shadcn/ui).
webapp-testing — Toolkit for interacting with and testing local web applications using Playwright.
xlsx — Use this skill any time a spreadsheet file is the primary input or output.