apple/swift-internals

This repository contains the source code for the Swift Internals website, an official Apple resource that hosts internal documentation for the Swift compiler and standard library. The site also hosts the Swift API Design Guidelines, which help developers write Swift code that feels consistent with the broader ecosystem. This particular repo has been archived and migrated to a combined Apple website repository, but it remains a record of how that documentation was published. At a high level, the project is a static website built with a popular tool called Jekyll. Instead of a complex web application with a database, the content is written in simple text and markup files. A setup script processes those files and generates finished web pages that can be hosted online. Anyone who wants to preview the site locally can do so by installing Ruby, running a few standard setup commands, and viewing the result in their browser. Editing the content is as straightforward as updating the text files and refreshing the page. The primary audience for this project is anyone building software with Swift who wants to look under the hood. A developer who wants to understand how the compiler optimizes code, or how memory management actually works, can read these documents to get answers. The API guidelines are particularly useful for developers designing libraries, because following them ensures their public interfaces feel natural to other Swift programmers. While the repo was maintained, contributors could fix typos, clarify confusing sections, or add new documentation by submitting changes. The main thing to note about the project is that it is archived. Anyone looking at it now is viewing a historical snapshot. The live, current version of this documentation has moved to a central Apple repository, which is where updates and improvements should be directed today.