1  “Open App” action • Makes OmniFocus the active application.

 2  “Select Files” action • Presents a file chooser dialog for selecting a file.

 3  File Path variable • A Shortcuts variable containing the file path (string) of the chosen file is added as the content of the “Text” action.

 4  File Data variable • A Shortcuts variable containing the file (data) of the chosen file is added to the Associated Files control.

 5  Data Input Socket • A Shortcuts variable containing the stored file path of the chosen file is placed in the Data Input Socket.

 6  The argument.input Parameter • The chosen file’s file path is retrieved and stored in a variable for use in the script.

 7  The argument.files Parameter • The chosen file’s data is retrieved and stored in a variable for use in the script.

TIP: In Shortcuts, set the shortcut to be pinned to the Shortcuts menu in the system-wide menu bar.

Attach Chosen File to Selected Task or Project
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(async () => {
	let sel = selection
	if(sel.tasks.length + sel.projects.length === 1){
		if (sel.tasks.length === 1){
			var selectedItem = sel.tasks[0]
		} else {
			var selectedItem = sel.projects[0]
		}
	} else {
		throw {
			name: "Selection Issue", 
			message: "Please select a single project or task."
		}
	}
	let aFilePath = argument.input
	let fileName = aFilePath.substring(aFilePath.lastIndexOf('/') + 1)
	let fileData = argument.files[0]
	let wrapper = FileWrapper.withContents(fileName, fileData)
	selectedItem.addAttachment(wrapper)
})().catch(err => {
	let alertPromise = new Alert(err.name, err.message).show()
	alertPromise.then(buttonIndex => {throw new Error(-128)})
})