Anthropic

Excel file creation, editing, and analysis. Uses pandas for data analysis and openpyxl for formulas/formatting. Includes financial modeling standards (color coding, number formatting), formula construction rules, and a mandatory recalculation step via LibreOffice.

Python-based toolkit for testing local web applications using Playwright browser automation. Manages server lifecycles via `scripts/with_server.py`, supports multiple concurrent servers, and follows a reconnaissance-then-action pattern (navigate, stabilize, inspect, act).

Suite of tools for creating elaborate, multi-component Claude.ai HTML artifacts using React 18, TypeScript, Vite, Parcel, Tailwind CSS, and shadcn/ui. Initializes project scaffolds, develops components, and bundles everything into a single self-contained HTML file.

Toolkit for styling artifacts with professional themes. Includes 10 pre-set themes (Ocean Depths, Sunset Boulevard, Forest Canopy, etc.) with curated color palettes and font pairings. Can also generate custom themes on-the-fly.

Creates Slack-optimized animated GIFs with utilities for frame assembly, platform validation, and smooth motion effects. Supports emoji GIFs (128x128) and message GIFs (480x480) with configurable FPS, color palettes, and easing functions.

Creates new skills, modifies existing skills, and measures skill performance through structured evaluation. Workflow: draft skill, write test prompts, spawn parallel subagent runs (with-skill vs baseline), grade results, iterate, and optimize trigger descriptions.

Full PowerPoint lifecycle management — reading, editing, and creating .pptx files. Uses markitdown for text extraction, XML unpack/edit/repack workflow for editing, and pptxgenjs (Node.js) for creation from scratch. Includes extensive design guidance and mandatory QA workflow.

Comprehensive PDF manipulation through Python libraries. Supports reading/extraction (pdfplumber, OCR), file manipulation (merge, split, rotate, watermark), creation (reportlab), security (password protection, encryption), and form filling.

Guide for creating high-quality MCP (Model Context Protocol) servers that enable LLMs to interact with external services through well-designed tools. Covers research, implementation, testing, and evaluation across TypeScript and Python.

Resource collection for writing organizational communications. Covers 3P updates, company newsletters, FAQ responses, status reports, leadership updates, project updates, and incident reports using company-preferred formats.

Creates distinctive, production-grade frontend interfaces with high design quality. Generates creative, polished HTML/CSS/React code that avoids generic AI aesthetics. Emphasizes unique typography, cohesive color strategies, strategic animations, and unexpected spatial compositions.

Manages Word document creation, editing, and analysis for .docx files. Uses the `docx` npm package for creation and an XML unpack/edit/repack workflow (Python) for editing existing documents with tracked changes and comments.

Guides users through a structured workflow for co-authoring documentation, proposals, technical specs, and decision docs. Three-stage process: Context Gathering, Refinement & Structure, and Reader Testing (using sub-agents for blind review).

Creates and manages Canva designs through MCP (Model Context Protocol) tools. Enables design creation, editing, and export via the Canva API integration.

Applies Anthropic's official brand identity guidelines for consistent visual styling. Automates brand application through intelligent font assignment, accent color cycling, and smart fallback mechanisms using python-pptx's RGBColor class.

Creates generative art using p5.js with seeded randomness, algorithmic philosophy manifestos, and interactive parameter exploration. Produces self-contained HTML artifacts with interactive canvases.

Reference MCP server implementing all protocol features — resources, tools, prompts, sampling, and logging. Useful for testing MCP clients.

MCP server that fetches web content and converts it to markdown. Supports HTTP requests with configurable user-agent and content size limits.

MCP server providing file system access — read, write, move, search, and get directory listings within configurable allowed paths.

MCP server for Git repository operations — clone, status, diff, log, commit, branch, and checkout across local repositories.

MCP server that provides persistent memory through a knowledge graph. Stores entities, relations, and observations in a local JSON file.

MCP server that enables dynamic, reflective problem-solving through sequential thought chains with branching, revision, and hypothesis testing.

MCP server that provides current time in various timezones and time conversion between zones using IANA timezone identifiers.