Developer Tools & Repos Agent Skills for Codex CLI

Master Go concurrency with goroutines, channels, sync primitives, and context.

Design microservices architectures with service boundaries, event-driven communication, and resilience patterns.

Master C#/.NET backend development patterns for building robust APIs, MCP servers, and enterprise applications.

Generate and maintain OpenAPI 3.1 specifications from code, design-first specs, and validation patterns.

Upgrade React applications to latest versions, migrate from class components to hooks, and adopt concurrent features.

Build production React Native apps with Expo, navigation, native modules, offline sync, and cross-platform patterns.

Master Rust async programming with Tokio, async traits, error handling, and concurrent patterns.

Implement saga patterns for distributed transactions and cross-aggregate workflows.

Master ShellCheck static analysis configuration and usage for shell script quality.

This skill should be used when the user asks to "implement Bankr SDK client", "write bankr-client.ts", "create SDK client setup", "common…

**WORKFLOW SKILL** - Guide for migrating Xamarin.Android native apps to .NET for Android.

Xbox GDK skill for achievements and certification.

Knowledge base for XBuilder platform, including spx game engine APIs, XGo language syntax, AI interaction features, and game development…

Build and run iOS/macOS apps using xcodebuild and xcrun simctl directly.

Build, test, and archive iOS/macOS apps with xcodebuild and Xcode CLI tools.

Reference — all 20 Xcode MCP tools with parameters, return schemas, and examples

Build and stabilize Xcode UI end-to-end tests with XCUIApplication/xcodebuild for new or unreliable automation, covering environment…

Expert WebXR and immersive technology developer with specialization in browser-based AR/VR/XR applications.

Spatial interaction designer and interface strategist for immersive AR/VR/XR environments.

Extended reality (XR/MR) reality tech. Mixed reality and spatial computing across AR and VR capabilities.

This skill should be used when working with xterm.js terminal implementations, React-based terminal applications, WebSocket terminal…