AI Agent Skills Directory

This skill helps you build LLMpowered applications with Claude. Choose the right surface based on your needs, detect the project language, then read the relevant languagespecific documentation.

Guide for creating high-quality MCP (Model Context Protocol) servers that enable LLMs to interact with external services through well-designed tools. Use when building MCP servers to integrate external APIs or services, whether in Python (FastMCP) or Node/TypeScript (MCP SDK).

Create new skills, modify and improve existing skills, and measure skill performance. Use when users want to create a skill from scratch, edit, or optimize an existing skill, run evals to test a skill, benchmark skill performance with variance analysis, or optimize a skill's description for better triggering accuracy.

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 defaults.

Guide users through a structured workflow for co-authoring documentation. Use when user wants to write documentation, proposals, technical specs, decision docs, or similar structured content. This workflow helps users efficiently transfer context, refine content through iteration, and verify the doc works for readers.

Toolkit for interacting with and testing local web applications using Playwright. Supports verifying frontend functionality, debugging UI behavior, capturing browser screenshots, and viewing browser logs.

Use this skill any time a spreadsheet file is the primary input or output. This means any task where the user wants to: open, read, edit, or fix an existing .xlsx, .xlsm, .csv, or .tsv file (e.g., adding columns, computing formulas, formatting, charting, cleaning messy data); create a new spreadsheet from scratch or fr

Use this skill any time a .pptx file is involved in any way — as input, output, or both. This includes: creating slide decks, pitch decks, or presentations; reading, parsing, or extracting text from any .pptx file (even if the extracted content will be used elsewhere, like in an email or summary); editing, modifying, o

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, or company design standards apply.

Use this skill whenever the user wants to do anything with PDF files. This includes reading or extracting text/tables from PDFs, combining or merging multiple PDFs into one, splitting PDFs apart, rotating pages, adding watermarks, creating new PDFs, filling PDF forms, encrypting/decrypting PDFs, extracting images, and

Knowledge and utilities for creating animated GIFs optimized for Slack. Provides constraints, validation tools, and animation concepts. Use when users request animated GIFs for Slack like "make me a GIF of X doing Y for Slack.

Toolkit for styling artifacts with a theme. These artifacts can be slides, docs, reportings, HTML landing pages, etc. There are 10 pre-set themes with colors/fonts that you can apply to any artifact that has been creating, or can generate a new theme on-the-fly.

Analyze tabular data from CSV, Excel, or other structured formats. Generate summary statistics, discover patterns, answer specific questions, and produce visualizations. Uses Python with pandas for data manipulation and matplotlib/seaborn for charts.

Collect user feedback from multiple channels, categorize it, extract patterns, and turn it into prioritized product decisions. Build a systematic process from raw input to actionable insight.

Document decisions, not just code. The most valuable documentation captures the why — the context, constraints, and tradeoffs that led to a decision. Code shows what was built; documentation explains why it was built this way and what alternatives were considered.

Create developerfriendly presentations using Slidev, a markdownbased slide framework powered by Vue. Supports live code execution, syntax highlighting, Mermaid diagrams, LaTeX math, and speaker notes. Ideal for tech talks, team demos, and conference presentations.

Extract structured data from documents in any format: PDF, DOCX, HTML, TXT, images, and more. Converts unstructured or semistructured content into clean JSON, CSV, or other structured formats. Handles invoices, forms, reports, and freetext documents.

Perform comprehensive data quality checks on datasets — validate schemas, detect anomalies, find duplicates, and enforce data contracts. Essential for ETL pipelines where bad data silently corrupts downstream analytics and dashboards.

Perform comprehensive security audits on codebases by scanning for OWASP Top 10 vulnerabilities, checking dependencies for known CVEs, detecting leaked secrets and API keys, and generating prioritized fix recommendations. This skill combines static analysis patterns with dependency auditing tools.

Analyzes source code to generate accurate, contextaware documentation at multiple levels: inline comments for complex logic, function/class docstrings, modulelevel overviews, architecture documents, and onboarding guides. Understands control flow, data transformations, side effects, and crossmodule dependencies.

Pandas is a Python library for loading, cleaning, transforming, and analyzing tabular data. It provides DataFrames for structured data manipulation, supports CSV, Excel, SQL, JSON, and Parquet formats, and offers powerful groupby aggregation, merge/join operations, time series resampling, and method chaining for buildi