Swift Subprocess

Definition

Swift Subprocess is a cross-platform Swift package for launching and interacting with child processes, built on Swift concurrency. Version 1.0 shipped with Swift 6.4, requiring swift-tools-version 6.2.

Key Points

• Uses RawSpan as single currency type for file I/O
• OutputProtocol/InputProtocol support noncopyable conformers
• Replaces shell-script subprocess patterns with structured async APIs
• Introduced as SF-0007 in 2025; reached stable 1.0 September 2026

Related

• webassembly
• swift-cooperative
• ci-cd
• apple

Sources

• 2026-09-15-swift-6-4-released
• 2026-09-15-swift-subprocess-1-0-release