Not a catalog of the Gang of Four patterns — an argument for why they’re foundational. Design patterns are a shared vocabulary that lets you read a codebase’s architectural intent from the names alone, and the value of that shared language transcends any specific programming language.
A jargon-free introduction to hexagonal architecture — the idea that your business logic should sit in the middle and the outside world (databases, screens, APIs, tests) should plug into it through simple, agreed-upon shapes. Small worked examples in Python, Go, and Rust show what changes when a new requirement arrives.
A working tour of the web-feed ecosystem — the RSS 2.0 lineage, IETF Atom (RFC 4287), JSON Feed 1.1, and OPML for exchanging subscription lists between readers — with practical guidance on which format to publish and current recommendations for desktop, mobile, and self-hosted readers.
A tour of regular expressions shallow enough to onboard a beginner and deep enough to refresh an expert — literals, quantifiers, groups, lookaround, and the engine differences between PCRE-family backtrackers and RE2-family linear-time engines that power grep, Python, Go, and Rust.