ios-networking

SKILL.md

Modern URLSession networking for iOS 15+ using async/await and structured concurrency.

Covers core async/await patterns: data requests, JSON decoding, downloads, uploads, and streaming with response validation

Includes protocol-based API client architecture, request middleware for authentication, token refresh flows, and error handling with structured error types

Provides pagination patterns, network reachability monitoring via NWPathMonitor, retry logic with exponential backoff, and URLSession configuration best practices

Extensive review checklist and common mistakes section covering cancellation, Keychain storage, large file handling, and testing strategies

iOS Networking

Modern networking patterns for iOS 26+ using URLSession with async/await and
structured concurrency. All examples target Swift 6.3. No third-party
dependencies required -- URLSession covers the vast majority of networking
needs.

Contents

Core URLSession async/await

API Client Architecture

Error Handling

Pagination

Network Reachability

Configuring URLSession

App Transport Security (ATS)

Common Mistakes

Review Checklist

References