Use Playwright to interact with and test local web applications, capture screenshots, debug UI behavior, and inspect browser logs.

Break a plan, spec, or conversation into independently actionable tracer-bullet tickets with explicit blocking relationships.

Huly — All-in-One Project Management Platform (alternative to Linear, Jira, Slack, Notion, Motion)

Apple's approach to interface design and fluid, physical motion, translated for the web. Use when building or reviewing gesture-driven UI, spring animations, drag/swipe/sheet interactions, momentum and interruptible transitions, translucent materials and depth, typography (optical sizing, tracking, leading), reduced-motion, or the design foundations (feedback, spatial consistency, restraint) behind Apple-style interfaces.

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.

A fast, scalable, high performance Gradient Boosting on Decision Trees library, used for ranking, classification, regression and other machine learning tasks for Python, R, Java, C++. Supports computation on CPU and GPU.

SANA: Efficient High-Resolution Image Synthesis with Linear Diffusion Transformer

H2O is an Open Source, Distributed, Fast & Scalable Machine Learning Platform: Deep Learning, Gradient Boosting (GBM) & XGBoost, Random Forest, Generalized Linear Modeling (GLM with Elastic Net), K-Means, PCA, Generalized Additive Models (GAM), RuleFit, Support Vector Machine (SVM), Stacked Ensembles, Automatic Machine Learning (AutoML), etc.

A large scale non-linear optimization library

High-Performance Symbolic Regression in Python and Julia

180 linear gradients in CSS3, Figma, Sketch and PSD formats — free for personal and commercial use