Thanks for the help.
The bundle id of the Shortcuts app is "com.apple.shortcuts" - but it has a helper with the bundle id "com.apple.shortcuts.events". Which is it?
For the entitlements I tried both "com.apple.shortcuts-events` and "com.apple.shortcuts.events" and didn't see a difference in behaviour.
Is there documentation or an example that I might have missed?
The above was straight from the WWDC session.