Problem you would like to solve

I want to template reusable signals for all my processes.

Proposed solution

Extend element template stack with support for:

• eventDefinition = "bpmn:SignalEventDefinition"
• binding type: "bpmn:Signal#property"
• binding type "bpmn:Signal#property" name allows any value. Should match the behaviour of message catch events
  
• signalRef on the signal event definition is automatically set to the signal element's id, matching the behaviour of messages
• signals linked to the templated elements cannot be linked to other elements

Alternatives considered

Moving away from the message behaviour would likely be confusing

Additional context

{
    "elementType": {
        "value": "bpmn:StartEvent",
        "eventDefinition": "bpmn:SignalEventDefinition"
    },
    "description": "Listen to the signal",
    "properties": [
        {
            "type": "hidden",
            "value": "MY_SIGNAL",
            "binding": {
                "type": "bpmn:Signal#property",
                "name": "name"
            }
        }
    ]
}