Covers NWConnection patterns for iOS 12-18, which is what you need if you're maintaining code that hasn't migrated to the newer NetworkConnection APIs in iOS 26+. Includes completion handler based TLS connections, UDP batching patterns that can cut CPU usage by 30%, and NWListener/NWBrowser for Bonjour discovery. The main skill points you to networking-legacy.md when you're working with older codebases or need to support devices that can't use the latest APIs. It's maintenance documentation, not cutting edge, but if you're stuck supporting iOS 18 or debugging existing NWConnection code, this is where the examples live.
npx skills add https://github.com/charleswiltgen/axiom --skill axiom-networking-legacy