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swiftlang/swift-evolution

Analysis updated 2026-06-24

15,835MarkdownAudience · developerComplexity · 1/5Setup · easy

TLDR

The official repository for Swift Evolution: written proposals, reviews, and release history that document how the Swift language changes over time.

Mindmap

mindmap
  root((swift-evolution))
    Inputs
      Proposal drafts
      Community reviews
    Outputs
      Accepted proposals
      Release notes
    Use Cases
      Track upcoming Swift features
      Submit a proposal
      Research language history
    Tech Stack
      Markdown
      GitHub
    Audience
      Swift developers
      Language designers
Click or tap to explore — scroll the page freely

Code map

Detail Auto

An interactive map of this repo's files and how they connect — its source is parsed live in your browser. Click Visualize to build it.

filefunction / class

What do people build with it?

USE CASE 1

Read accepted proposals to understand why a Swift feature was designed a certain way

USE CASE 2

Draft and submit your own Swift language proposal

USE CASE 3

Track which features are planned for the next Swift release

USE CASE 4

Study how a large open language manages its public review process

What is it built with?

Markdown

How does it compare?

swiftlang/swift-evolutionellisonleao/magictoolsupptime/upptime
Stars15,83516,63817,025
LanguageMarkdownMarkdownMarkdown
Setup difficultyeasyeasyeasy
Complexity1/51/52/5
Audiencedeveloperdeveloperops devops

Figures from each repo's GitHub metadata at analysis time.

How do you get it running?

Difficulty · easy Time to first run · 5min

Documentation only, nothing to install, just read the Markdown files.

In plain English

This repository is the official home of Swift Evolution, the process by which the Swift programming language gets changed and improved over time. Swift is a programming language used primarily for building apps on Apple platforms. Rather than having a small team make changes behind closed doors, Swift uses a public proposal process where anyone can suggest and discuss changes to the language. The repository maintains written proposals that describe potential additions, removals, or modifications to Swift's features, standard library (the built-in set of tools that come with the language), and package manager (the system for organizing and sharing Swift code). Each proposal goes through a review process before being accepted or rejected. The repository also tracks the release history of Swift versions, with announcements and release dates going back to Swift 2.2. You would look at this repository if you want to understand why Swift works the way it does, follow discussions about upcoming language changes, submit your own proposal for a new Swift feature, or track what is planned for future versions. It is a documentation and governance repository rather than runnable software, written entirely in Markdown (a plain-text format for structured documents). It is aimed at Swift developers who want to participate in or stay informed about the evolution of the language itself.

Copy-paste prompts

Prompt 1
Find the swift-evolution proposal that introduced async await and summarize the rationale in plain English
Prompt 2
Walk me through writing my own swift-evolution proposal including the required sections and review process
Prompt 3
List every proposal accepted for the most recent Swift release and group them by area
Prompt 4
Compare swift-evolution to Python PEPs and Rust RFCs and tell me what each does differently

Frequently asked questions

What is swift-evolution?

The official repository for Swift Evolution: written proposals, reviews, and release history that document how the Swift language changes over time.

What language is swift-evolution written in?

Mainly Markdown. The stack also includes Markdown.

How hard is swift-evolution to set up?

Setup difficulty is rated easy, with roughly 5min to a first successful run.

Who is swift-evolution for?

Mainly developer.

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