Developer Tools & Repos Agent Skills for ChatGPT

Check for .claude/apple-design-context.md before asking questions.

Three.js animation - keyframe animation, skeletal animation, morph targets, animation mixing.

Three.js interaction - raycasting, controls, mouse/touch input, object selection.

Create 3D scenes, interactive experiences, and visual effects using Three.js.

Build Unity games with optimized C# scripts, efficient rendering, and proper asset management.

Expert guide for Unreal Engine 5.x C++ development, covering UObject hygiene, performance patterns, and best practices.

Produce a complete mobile app architecture design — platform choice, navigation structure, state management, data layer, key screens.

Design high-quality mobile app UI/UX screens, flows, and components.

Toolkit for mobile app testing using Maestro MCP.

Streamlines the development, testing, and automation of mobile applications through specialized agentic workflows.

End-to-end mobile testing of Expo/React Native apps via claude-in-mobile MCP + mcporter.

Flutter 3.27+ patterns — Riverpod 2 state with codegen, GoRouter 14+ navigation, Impeller rendering (default on all platforms), WASM web…

Audits mobile app interfaces across Flutter and React Native builds for platform conventions, responsive layouts, touch targets, and…

Automated testing workflow with pass@k metrics for mobile development.

Modal and dialog specialist for web applications.

ModelWar - Core War for Agents

Modern C# language features for .NET 10 and C# 14.

Write modern, high-performance C# code using records, pattern matching, value objects, async/await, Span<T>/Memory<T>, and best-practice…

WHEN building SwiftUI views, managing state, setting up shared services, or making architectural decisions; NOT for UIKit or legacy…

Use when the user asks to "set up types without a build step", "use vanilla JS with types", "configure erasable syntax", or mentions…

Use when the user wants to modernize iOS code to iOS 17/18 patterns, migrate from ObservableObject to @Observable, update @StateObject to…