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Toolkit for creating animated GIFs optimized for Slack with validation and animation utilities. \n \n Provides GIFBuilder for frame assembly, validators to check Slack compliance, and easing functions for smooth motion (bounce, elastic, ease-in-out, etc.) \n Supports emoji GIFs (128x128, under 3 seconds) and message GIFs (480x480) with configurable FPS, color palette, and optimization flags \n Includes animation concepts (shake, pulse, bounce, spin, fade, slide, zoom, particle burst) with code e

Native Python Playwright scripts for testing local web applications with server lifecycle management. \n \n Includes with_server.py helper to automatically start and manage single or multiple servers before running automation scripts \n Supports reconnaissance-then-action workflow: screenshot/inspect rendered DOM, identify selectors, then execute actions with discovered selectors \n Emphasizes waiting for networkidle on dynamic apps before DOM inspection to avoid timing issues \n Provides exampl

Multi-component React artifacts for Claude with bundling, state management, and shadcn/ui component library. \n \n Scaffolds React 18 + TypeScript projects with Vite, Tailwind CSS, and 40+ pre-installed shadcn/ui components via automated initialization script \n Bundles complete artifacts into single self-contained HTML files with inlined assets, ready for Claude artifact display \n Includes design guidance to avoid common \"AI slop\" patterns like excessive centering, purple gradients, and unif

Generative art creation using p5.js with seeded randomness and parametric exploration. \n \n Creates algorithmic philosophies (computational aesthetic movements) expressed through interactive p5.js sketches with full parameter control \n Supports seeded randomness for reproducible art variations, seed navigation (previous/next/random/jump), and real-time parameter adjustment via sliders and color pickers \n Outputs self-contained HTML artifacts with embedded p5.js code, sidebar controls, and dow

Comprehensive guide for building high-quality MCP servers that connect LLMs to external services. \n \n Four-phase workflow covering research, implementation, testing, and evaluation with language-specific guidance for TypeScript (recommended) and Python \n Emphasizes API coverage over workflow tools, clear tool naming with consistent prefixes, and actionable error messages for agent guidance \n Includes best practices for input/output schemas, pagination, response formatting, and tool annotatio

Create, read, edit, and manipulate Word documents (.docx files) with full formatting control. \n \n Create new .docx files from scratch using JavaScript with support for headings, tables, images, hyperlinks, footnotes, headers/footers, and table of contents \n Edit existing documents by unpacking XML, making targeted changes (including tracked changes and comments), and repacking with validation \n Extract text and analyze content using pandoc or raw XML access; convert legacy .doc files to .doc

Professional font and color themes for styling presentation decks, documents, and web artifacts. \n \n Includes 10 pre-set themes (Ocean Depths, Sunset Boulevard, Forest Canopy, Modern Minimalist, Golden Hour, Arctic Frost, Desert Rose, Tech Innovation, Botanical Garden, Midnight Galaxy) each with cohesive color palettes and complementary font pairings \n Supports custom theme generation on-the-fly when none of the preset themes fit your needs \n Applies themes consistently across artifacts by r