swift-sh is a CLI tool that enables Swift scripts to declare and fetch third-party dependencies via special comments in import statements. It parses a script's imports (e.g., `import Foo // @mxcl ~> 1.0`), generates a Swift Package Manager project with those dependencies, builds it, and runs the resulting executable. The architecture is modular with separate targets for script parsing (Script), command handling (Command), and utility functions (Utility). The tool supports both file-based and stdin scripts, local dependencies, and provides subcommands for ejecting to a full package and editing in Xcode (macOS only). It is a pragmatic solution that bridges the gap between ad-hoc scripting and SwiftPM's package structure.