Developer Tools & Repos Agent Skills for ChatGPT

Use Apple CryptoKit for Swift cryptographic primitives.

Use when building cross-platform applications with Flutter 3+ and Dart.

Control smart-home accessories and commission Matter devices using HomeKit and MatterSupport.

Lottie animation skill for integrating After Effects animations into iOS, Android, and cross-platform mobile apps with playback control…

CRITICAL: Use for Makepad getting started and app structure.

Implement, review, or improve maps and location features in iOS/macOS apps using MapKit and CoreLocation.

Mobile-first design thinking and decision-making for iOS and Android apps.

Add drawings, shapes, and a consistent markup experience using PaperKit.

Procedural level generation skill for PCG algorithms.

Get a new developer up and running with the Chops codebase — prerequisites, build, architecture, and common tasks.

Implement Swift Codable models for JSON and property-list encoding and decoding with JSONDecoder, JSONEncoder, CodingKeys, and custom…

Three.js materials - PBR, basic, phong, shader materials, material properties.

Large world streaming skill for world partition.

Autonomous browser game agent. Analyzes game concept, implements with KAPLAY.js (2D) or Three.js (3D), playtests in headless browser…

This skill provides templates, analysis frameworks, and quality criteria for game reverse-engineering and competitive analysis.

Directs creative vision and transforms game design concepts into production-ready art direction specifications.

Visual style, rendering techniques, and animation for web games.

Use when generated candidates must become engine-ready files with predictable size, canvas, alpha, anchor, and pivot — "clean these up for…

Numeric balance across objects with stats: cost curves, transitive versus intransitive systems, payoff matrices, dominant strategy…

Verbalizes and structures vague game ideas into actionable design blueprints focusing on player decision-making.

The hub and first pass on any single mechanic: the 5-Component Filter (Clarity, Motivation, Response, Satisfaction, Fit), the plugin-wide…