React and Next.js performance guidance for writing, reviewing, and refactoring production UI code.

Reviews animation and motion code against a high craft bar derived from Emil Kowalski's design engineering philosophy. Default to flagging; approval is earned.

This skill encodes Emil Kowalski's philosophy on UI polish, component design, animation decisions, and the invisible details that make software feel great.

MJML: the only framework that makes responsive-email easy

A modified web browser that helps in responsive web development. A web developer's must have dev-tool.

A Codex skill that analyzes startup URLs or product ideas to find evidence-backed potential first customers using public signals.

A fast, lightweight text editor for Markdown, JSON, YAML, and TOML files. Built with Rust and egui for a native, responsive experience.

Generate responsive pages and apps on HTML, Tailwind, Flutter and SwiftUI.

A lightweight, cloud-native GIS platform for visualizing, exploring, and analyzing geospatial data across desktop and web environments, with a responsive layout for mobile screens.

Self-contained floating chat widget with welcome screen, social links, meeting button, and message input. Single HTML file, zero dependencies.

Responsive, Multi-Vendor, MultiLanguage Online Store Platform (shopping cart solution)

The mobile-friendly, responsive, and lightweight jQuery date & time input picker.