Developer Tools & Repos Agent Skills for Codex CLI

.NET MAUI app lifecycle guidance — the four app states, cross-platform Window lifecycle events (Created, Activated, Deactivated, Stopped…

Guide for theming .NET MAUI apps — light/dark mode via AppThemeBinding, ResourceDictionary theme switching, DynamicResource bindings…

MVVM architecture for .NET game backends — System.Reactive, DynamicData, SourceCache, ViewModel binding with Godot nodes, ItemsNode…

Correctly call native (C/C++) libraries from .NET using P/Invoke and LibraryImport.

Scans .NET code for ~50 performance anti-patterns across async, memory, strings, collections, LINQ, regex, serialization, and I/O with…

Runtime debugging tools for Nethercore games on all consoles.

Core development workflow for Nethercore WASM games.

Optimization techniques for Nethercore WASM games.

Publishing Nethercore games to nethercore.systems.

Use when working with the Network-Chronicles project or similar codebases.

Provides patterns and code examples for building Next.js 16+ applications with App Router architecture.

Build Next.js 16 apps with App Router, Server Components/Actions, Cache Components ("use cache"), and async route params.

Implement data fetching, server actions, and performance patterns for Next.js App Router.

Expert Next.js performance optimization skill covering Core Web Vitals, image/font optimization, caching strategies, streaming, bundle…

This skill should be used when the user asks about "Server Actions", "form handling in Next.js", "mutations", "useFormState"…

This skill embodies three foundational principles: App (root Model) ├── Header (static) ├── MainContent (dynamic) │ ├── Component A │ └──…

Master Bevy's Entity Component System (ECS) in Rust, covering Systems, Queries, Resources, and parallel scheduling.

Specialized guide for migrating Godot 3.x projects to Godot 4 (GDScript 2.0), covering syntax changes, Tweens, and exports.

Guide for creating high-quality MCP (Model Context Protocol) servers that enable LLMs to interact with external services through…

Framework-less PHP knowledge base. Provides pure PHP project architecture, DDD integration, PSR-7/PSR-15 HTTP, standalone persistence, DI…

When to activate: Express with TypeScript, middleware patterns, REST API design, error handling, OpenAPI, JWT auth, rate limiting