Systematic troubleshooting guide for when network connections fail in iOS apps. Covers the usual suspects: DNS resolution failures, TLS certificate validation errors, connection timeouts, message framing problems, and the cellular/VPN edge cases that don't show up in development. The decision tree approach is honest about the eight distinct failure modes instead of pretending "check your URL" is helpful advice. Also handles App Transport Security rejections and production crisis scenarios with communication templates. If you're staring at a connection timeout or an App Store rejection for HTTP usage, this walks through actual diagnosis instead of guesswork.
npx skills add https://github.com/charleswiltgen/axiom --skill axiom-networking-diag