<?xml version="1.0" encoding="UTF-8"?><rss version="2.0"><channel><title>eugenemind.com</title><description>Notes on mobile engineering, AI, and language learning.</description><link>https://eugenemind.com/</link><language>en</language><item><title>some vs any in Swift: The Difference and When to Use Each</title><link>https://eugenemind.com/blog/swift-some-vs-any/</link><guid isPermaLink="true">https://eugenemind.com/blog/swift-some-vs-any/</guid><description>Understanding existential and opaque types through checkout, SDK design, SwiftUI, and Swift runtime internals.</description><pubDate>Sat, 17 Oct 2026 00:00:00 GMT</pubDate><category>swift</category><category>ios</category><category>generics</category><category>swiftui</category><author>hello@eugenemind.com (Ievgen (Eugene) Goloboiar)</author></item><item><title>How to Clean Xcode DerivedData and Why It Grows to Tens of Gigabytes</title><link>https://eugenemind.com/blog/xcode-deriveddata/</link><guid isPermaLink="true">https://eugenemind.com/blog/xcode-deriveddata/</guid><description>Why Xcode DerivedData grows to tens of gigabytes on a Mac, how to inspect and clean it (Xcode Settings, Terminal, Xcode 27, free tools), and a small zsh script called `xcode-dd` for a one-command overview.</description><pubDate>Sat, 10 Oct 2026 00:00:00 GMT</pubDate><category>ios</category><category>xcode</category><category>macos</category><category>deriveddata</category><category>zsh</category><author>hello@eugenemind.com (Ievgen (Eugene) Goloboiar)</author></item><item><title>Where Codex Tokens Actually Go: 67% Tool Outputs, 4.6% My Prompts</title><link>https://eugenemind.com/blog/token-usage-experiment-analysis/</link><guid isPermaLink="true">https://eugenemind.com/blog/token-usage-experiment-analysis/</guid><description>A personal experiment with Codex session logs: where tokens actually go, how I measured usage, and what I changed in the way I manage context.</description><pubDate>Sat, 29 Aug 2026 00:00:00 GMT</pubDate><category>codex</category><category>claude-code</category><category>coding-agents</category><category>context-engineering</category><category>token-optimization</category><category>agents-md</category><author>hello@eugenemind.com (Ievgen (Eugene) Goloboiar)</author></item><item><title>iOS Logging and Analytics: A Practical Guide</title><link>https://eugenemind.com/blog/logging-and-analytics/</link><guid isPermaLink="true">https://eugenemind.com/blog/logging-and-analytics/</guid><description>Logging and analytics aren&apos;t a checkbox. They do different jobs, and if you don&apos;t understand which, all that instrumentation quietly turns into noise you can&apos;t get anything out of.</description><pubDate>Sat, 22 Aug 2026 00:00:00 GMT</pubDate><category>engineering</category><category>observability</category><category>mobile</category><author>hello@eugenemind.com (Ievgen (Eugene) Goloboiar)</author></item></channel></rss>