ARCHIVE · 02
Follow the trail from foundational concepts to practical engineering decisions.
Resources such as file handles and locks are meaningful only when unique, so they must not be copied. This guide explains how Swift 5.9’s ~Copyable encodes noncopyability in a type, covers borrowing, consuming, and inout, and clarifies where to use them.
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Swift 5.9 macros are code-generation plugins embedded in the compiler. This overview covers how they receive syntax trees and return code, the freestanding (#) and attached (@) branches, and the cost of creating your own.
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A struct's size is not a simple sum of its properties. This covers measured size, stride, alignment, padding, Optional's use of extra inhabitants, and 64-bit existential containers.
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Lasagna code is code where adding one field requires changing seven files despite neatly separated layers. This article summarizes why layers multiply, where they cost you, and when to keep or remove them.
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Claude Code permissions use allow, ask, and deny rules, evaluated with deny first. This article covers /permissions, Bash wildcard syntax, Shift+Tab mode cycling, and settings-file precedence.
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