diff --git a/custom-completions/swift-bundler/README.md b/custom-completions/swift-bundler/README.md
new file mode 100644
index 00000000..aed0cf41
--- /dev/null
+++ b/custom-completions/swift-bundler/README.md
@@ -0,0 +1,9 @@
+# Swift Bundler
+
+An Xcodeproj-less tool for creating cross-platform Swift apps.
+
+## Status
+
+Currently written entirely by hand, with all visible subcommands, arguments, flags, and options (i.e. flags with arguments) fully documented. Completions are provided for most options, and they should remain fairly robust across swift-bundler versions.
+
+(In the future it'd be nice to upstream a Nushell completion script generator into swift-argument-parser so that this can be autogenerated by swift-bundler itself, but as of now such a generator doesn't exist.)
diff --git a/custom-completions/swift-bundler/swift-bundler-completions.nu b/custom-completions/swift-bundler/swift-bundler-completions.nu
new file mode 100644
index 00000000..aae18897
--- /dev/null
+++ b/custom-completions/swift-bundler/swift-bundler-completions.nu
@@ -0,0 +1,502 @@
+export module swift-bundler {
+    def get-bundle-arg-values [arg_name: string]: nothing -> list<string> {
+        ^swift-bundler bundle --experimental-dump-help
+            | from json
+            | get command.arguments
+            | where valueName == $arg_name
+            | get abstract
+            | parse "{_} ({values}){_}"
+            | get values
+            | split row "|"
+    }
+
+    def "nu-complete sbun bundler" [] {
+        get-bundle-arg-values bundler
+    }
+    def "nu-complete sbun configuration" [] {
+        get-bundle-arg-values configuration
+    }
+    def "nu-complete sbun arch" [] {
+        get-bundle-arg-values arch
+    }
+    def "nu-complete sbun platform" [] {
+        get-bundle-arg-values platform
+    }
+    def "nu-complete sbun apps" [context: string] {
+        let directory = $context
+            | split row -r '\s+'
+            | skip until {|arg| $arg in ["--directory" "-d"] }
+            | get 1?
+            | default "./"
+
+        open ($directory | path join Bundler.toml) | get apps | columns
+    }
+    def "nu-complete sbun templates" [] {
+        swift-bundler templates list
+            | lines
+            | where { str starts-with "* " }
+            | each { parse "* {value}: {description}" }
+            | flatten
+    }
+    def "nu-complete sbun devices" [] {
+        {
+            options: {sort: false}
+            completions: (swift-bundler devices list
+                | lines
+                | where { str starts-with "* " }
+                | each {
+                    parse --regex r#'\* (?<uuid>[a-zA-Z0-9-]+): (?<device>.*) \(.*\)$'#
+                    | rename --column {
+                        uuid: "value"
+                        device: "description"
+                    }
+                }
+                | flatten
+                | prepend "host")
+        }
+    }
+    def "nu-complete sbun simulators" [] {
+        {
+            options: {sort: false}
+            completions: (swift-bundler simulators list
+                | lines
+                | where { str starts-with "* " }
+                | each {
+                    parse --regex r#'\* (?<uuid>[a-zA-Z0-9-]+): (?<simulator>.*) \(.*\)$'#
+                    | rename --column {
+                        uuid: "value"
+                        simulator: "description"
+                    }
+                }
+                | flatten)
+        }
+    }
+
+    # A tool for creating apps from Swift packages.
+    export extern main [
+        --version
+        # Show the version.
+        --help(-h)
+        # Show help information.
+    ]
+
+    # Create an app bundle from a package.
+    export extern bundle [
+        app_name?: string@"nu-complete sbun apps"
+        # The name of the app to build.
+        --bundler: string@"nu-complete sbun bundler"
+        # The bundler to use.
+        --toolchain: string
+        # An alternative Swift toolchain to use.
+        --directory(-d): directory
+        # The directory containing the package to build. This changes the working directory before any
+        # other operation.
+        --config-file: path
+        # Overrides the default configuration file location.
+        --products-directory: directory
+        # The directory containing the built products. Can only be set when `--skip-build` is supplied.
+        --configuration(-c): string@"nu-complete sbun configuration"
+        # The build configuration to use.
+        --arch(-a): string@"nu-complete sbun arch" = "arm64"
+        # The architectures to build for.
+        --scratch-path: directory = ".build"
+        # A custom scratch directory path.
+        --Xswiftpm: string
+        # Additional arguments to pass to the SwiftPM builder when building.
+        --Xxcodebuild: string
+        # Additional arguments to pass to the xcodebuild builder when building.
+        --platform(-p): string@"nu-complete sbun platform" = "macOS"
+        # The platform to build for.
+        --device: string@"nu-complete sbun devices"
+        # A device name, id or search term to select a target device (e.g. `"Apple TV"` or
+        # `"John Appleseed's iPhone"`). Can be a simulator. Use `"host"` to refer to the host machine.
+        --strip
+        # Strip the main executable.
+        --simulator: string@"nu-complete sbun simulators"
+        # A simulator name, id or search term to select the target simulator (e.g. `"iPhone 8"` or
+        # `"Apple Vision Pro"`).
+        --identity: string
+        # The identity to use for codesigning.
+        --provisioning-profile
+        # The provisioning profile to embed in the app (only applicable when targeting non-macOS
+        # physical Apple devices).
+        --codesign
+        # Codesign the application. Default on non-macOS Apple devices.
+        --no-codesign
+        # Do not codesign the application. Default on macOS, Linux and simulators.
+        --entitlements: path
+        # Provide an entitlements file to use when codesigning.
+        --universal(-u)
+        # Build a universal application. Equivalent to `--arch` `arm64` `--arch` `x86_64`.
+        --experimental-stand-alone
+        # Build an application which doesn't rely on any system-wide third-party libraries being
+        # installed (such as gtk). This features is experimental and potentially incompatible with
+        # `--universal`, use with care.
+        --xcodebuild
+        # Build with xcodebuild instead of SwiftPM. This is the default when building for non-macOS
+        # Apple platforms from a Mac, since SwiftPM has issues doing so.
+        --no-xcodebuild
+        # Force swiftpm to be used when targeting non-macOS Apple platforms. Use with care because many
+        # features, such as conditional dependencies in package manifests, may break.
+        --skip-build
+        # Skip the build step.
+        --show-bundle-path
+        # Print the path of the output bundle and exits. The bundle may not exist yet if you haven't
+        # already performed a build.
+        --built-with-xcode
+        # Treats the products in the products directory as if they were built by Xcode (which is the
+        # same as universal builds by SwiftPM). Can only be set when `--skip-build` is supplied.
+        --verbose(-v)
+        # Print verbose error messages.
+        --version
+        # Show the version.
+        --help(-h)
+        # Show help information.
+    ]
+
+    # Run a package as an app.
+    export extern run [
+        app_name?: string@"nu-complete sbun apps"
+        # The name of the app to build.
+        ...passThroughArguments
+        # Command line arguments to pass through to the app.
+        --bundler: string@"nu-complete sbun bundler"
+        # The bundler to use.
+        --toolchain: string
+        # An alternative Swift toolchain to use.
+        --directory(-d): directory
+        # The directory containing the package to build. This changes the working directory before any
+        # other operation.
+        --config-file: path
+        # Overrides the default configuration file location
+        --products-directory: directory
+        # The directory containing the built products. Can only be set when `--skip-build` is supplied.
+        --configuration(-c): string@"nu-complete sbun configuration"
+        # The build configuration to use.
+        --arch(-a): string@"nu-complete sbun arch" = "arm64"
+        # The architectures to build for.
+        --scratch-path: directory = ".build"
+        # A custom scratch directory path.
+        --Xswiftpm: string
+        # Additional arguments to pass to the SwiftPM builder when building.
+        --Xxcodebuild: string
+        # Additional arguments to pass to the xcodebuild builder when building.
+        --platform(-p): string@"nu-complete sbun platform" = "macOS"
+        # The platform to build for.
+        --device: string@"nu-complete sbun devices"
+        # A device name, id or search term to select a target device (e.g. `"Apple TV"` or
+        # `"John Appleseed's iPhone"`). Can be a simulator. Use `"host"` to refer to the host machine.
+        --strip
+        # Strip the main executable.
+        --simulator: string@"nu-complete sbun simulators"
+        # A simulator name, id or search term to select the target simulator (e.g. `"iPhone 8"` or
+        # `"Apple Vision Pro"`).
+        --identity: string
+        # The identity to use for codesigning.
+        --provisioning-profile
+        # The provisioning profile to embed in the app (only applicable when targeting non-macOS
+        # physical Apple devices).
+        --codesign
+        # Codesign the application. Default on non-macOS Apple devices.
+        --no-codesign
+        # Do not codesign the application. Default on macOS, Linux and simulators.
+        --entitlements: path
+        # Provide an entitlements file to use when codesigning.
+        --universal(-u)
+        # Build a universal application. Equivalent to `--arch arm64 --arch x86_64`.
+        --experimental-stand-alone
+        # Build an application which doesn't rely on any system-wide third-party libraries being
+        # installed (such as gtk). This features is experimental and potentially incompatible with `--universal`, use with care.
+        --xcodebuild
+        # Build with xcodebuild instead of SwiftPM. This is the default when building for non-macOS
+        # Apple platforms from a Mac, since SwiftPM has issues doing so.
+        --no-xcodebuild
+        # Force swiftpm to be used when targeting non-macOS Apple platforms. Use with care because many
+        # features, such as conditional dependencies in package manifests, may break.
+        --env: path
+        # A file containing environment variables to pass to the app.
+        --skip-build
+        # Skips the building and bundling steps.
+        --hot
+        # Enables hot reloading.
+        --verbose(-v)
+        # Print verbose error messages.
+        --version
+        # Show the version.
+        --help(-h)
+        # Show help information.
+    ]
+
+    # Clean a project's scratch directory.
+    export extern clean [
+        --directory(-d): directory
+        # The directory containing the package to build.
+        --scratch-path: directory = ".build"
+        # A custom scratch directory path.
+        --toolchain: string
+        # An alternative Swift toolchain to use.
+        --verbose(-v)
+        # Print verbose error messages.
+        --version
+        # Show the version.
+        --help(-h)
+        # Show help information.
+    ]
+
+    # Create a new app package.
+    export extern create [
+        app_name: string
+        # The app's name. Must only contain characters from the English alphabet.
+        --identifier(-i): string
+        # The app's identifier (e.g. `"com.example.ExampleApp"`).
+        --version: string
+        # The app's initial version.
+        --category: string
+        # The app's category.
+        --icon: path
+        # The app's icon file (1024x1024 png or icns file).
+        --info-plist: path
+        # An Info.plist file containing entries to add to the app's configuration.
+        --directory(-d): directory
+        # Directory to create the app in. Default: create a new directory at `./[app-name]`.
+        --template(-t): string@"nu-complete sbun templates"
+        # Template to create the app from.
+        --template-repository: directory
+        # A directory to search for the template in.
+        --toolchain: string
+        # An alternative Swift toolchain to use.
+        --indentation: string = "spaces=4"
+        # Custom indentation style: either `"tabs"` or `"spaces=[count]"`.
+        --force(-f)
+        # Force creation even if the template does not support the current OS and installed Swift
+        # version.
+        --vscode
+        # Add vscode configuration files necessary to enable ergonomic debugging.
+        --verbose(-v)
+        # Print verbose error messages.
+        --help(-h)
+        # Show help information.
+    ]
+
+    # Converts an xcodeproj to a Swift Bundler project.
+    export extern convert [
+        xcode_file: path
+        # Xcodeproj to convert.
+        --out(-o): directory
+        # The output directory.
+        --dont-warn
+        # Disables the experimental feature warning
+        --verbose(-v)
+        # Print verbose error messages.
+        --version
+        # Show the version.
+        --help(-h)
+        # Show help information.
+    ]
+
+    # List apps in the current Swift Bundler project.
+    export extern "config apps" [
+        --directory(-d): directory
+        # The directory containing the package to inspect.
+        --json
+        # Format command output as JSON.
+        --verbose(-v)
+        # Print verbose error messages.
+        --version
+        # Show the version.
+        --help(-h)
+        # Show help information.
+    ]
+
+    # List apps in the current Swift Bundler project.
+    export extern "config apps list" [
+        --directory(-d): directory
+        # The directory containing the package to inspect.
+        --json
+        # Format command output as JSON.
+        --verbose(-v)
+        # Print verbose error messages.
+        --version
+        # Show the version.
+        --help(-h)
+        # Show help information.
+    ]
+
+    # Migrate a project's config file to the latest format.
+    export extern "config migrate" [
+        --directory(-d): directory
+        # The directory containing the package to migrate.
+        --verbose(-v)
+        # Print verbose error messages.
+        --version
+        # Show the version.
+        --help(-h)
+        # Show help information.
+    ]
+
+    # List available iOS, tvOS, visionOS, and Android devices.
+    export extern devices [
+        --verbose(-v)
+        # Print verbose error messages.
+        --version
+        # Show the version.
+        --help(-h)
+        # Show help information.
+    ]
+
+    # List available iOS, tvOS, visionOS, and Android devices.
+    export extern "devices list" [
+        --verbose(-v)
+        # Print verbose error messages.
+        --version
+        # Show the version.
+        --help(-h)
+        # Show help information.
+    ]
+
+    # List available iOS, tvOS visionOS, and Android simulators.
+    export extern simulators [
+        filter?: string
+        # A search term to filter simulators with.
+        --verbose(-v)
+        # Print verbose error messages.
+        --version
+        # Show the version.
+        --help(-h)
+        # Show help information.
+    ]
+
+    # List available iOS, tvOS visionOS, and Android simulators.
+    export extern "simulators list" [
+        filter?: string
+        # A search term to filter simulators with.
+        --verbose(-v)
+        # Print verbose error messages.
+        --version
+        # Show the version.
+        --help(-h)
+        # Show help information.
+    ]
+
+    # Boot an iOS, tvOS, visionOS, or Android simulator.
+    export extern "simulators boot" [
+        id_or_name: string@"nu-complete sbun simulators"
+        # The id or name of the simulator to start. Substring matching is used when filtering simulator
+        # names.
+        --verbose(-v)
+        # Print verbose error messages.
+        --version
+        # Show the version.
+        --help(-h)
+        # Show help information.
+    ]
+
+    # Boot an iOS, tvOS, or visionOS simulator.
+    export extern "simulators simctl boot" [
+        id_or_name: string@"nu-complete sbun simulators"
+        # The id or name of the simulator to start. Substring matching is used when filtering simulator
+        # names.
+        simctl_arguments: string
+        # Additional arguments to pass through to simctl.
+        --arch: string@"nu-complete sbun arch"
+        # Architecture for the simulator.
+        --verbose(-v)
+        # Print verbose error messages.
+        --version
+        # Show the version.
+        --help(-h)
+        # Show help information.
+    ]
+
+    # Boot an Android virtual device.
+    export extern "simulators avd boot" [
+        name: string@"nu-complete sbun simulators"
+        # The name of the emulator to start. Supports partial substring matching.
+        emulator_arguments: string
+        # Additional arguments for the 'emulator' CLI.
+        --arch: string@"nu-complete sbun arch"
+        # Architecture to boot the emulator with.
+        --verbose(-v)
+        # Print verbose error messages.
+        --attach
+        # Attach to 'emulator' CLI after booting the emulator.
+        --version
+        # Show the version.
+        --help(-h)
+        # Show help information.
+    ]
+
+    # List available templates.
+    export extern templates [
+        --template-repository: directory
+        # An alternate directory to search for templates in.
+        --verbose(-v)
+        # Print verbose error messages.
+        --version
+        # Show the version.
+        --help(-h)
+        # Show help information.
+    ]
+
+    # List available templates.
+    export extern "templates list" [
+        --template-repository: directory
+        # An alternate directory to search for templates in.
+        --verbose(-v)
+        # Print verbose error messages.
+        --version
+        # Show the version.
+        --help(-h)
+        # Show help information.
+    ]
+
+    # Get info about a template.
+    export extern "templates info" [
+        template: string@"nu-complete sbun templates"
+        # The template to get info about.
+        --template-repository: directory
+        # An alternate directory to search for the template in.
+        --verbose(-v)
+        # Print verbose error messages.
+        --version
+        # Show the version.
+        --help(-h)
+        # Show help information.
+    ]
+
+    # Update the default templates to the latest version.
+    export extern "templates update" [
+        --verbose(-v)
+        # Print verbose error messages.
+        --version
+        # Show the version.
+        --help(-h)
+        # Show help information.
+    ]
+
+    # Generate the files required for Xcode to work nicely with a package.
+    #
+    # This requires Swift Bundler to be installed at `/opt/swift-bundler/swift-bundler`.
+    export extern generate-xcode-support [
+        --directory(-d): directory
+        # The root directory of the package to generate Xcode support files for.
+        --config-file: path
+        # Overrides the default configuration file location.
+        --verbose(-v)
+        # Print verbose error messages.
+        --version
+        # Show the version.
+        --help(-h)
+        # Show help information.
+    ]
+
+    # List available codesigning identities.
+    export extern list-identities [
+        --verbose(-v)
+        # Print verbose error messages.
+        --version
+        # Show the version.
+        --help(-h)
+        # Show help information.
+    ]
+}