Swift Package Manager

Own package topology and reproducibility. Defer source semantics to swift-stable and behavioral test design to swift-testing.

Inspect first

• Read Package.swift, resolved dependencies, source/test/resource layout, plugins, generated code, and CI.
• Record tools version, compiler, platforms, products, targets, conditions, unsafe flags, and dependency pinning policy.
• Run swift package describe and inspect the affected target graph.
• Verify manifest APIs and platform/compiler requirements against official Swift documentation before upgrading.

Design rules