One cool undocumented GitHub Actions trick I spotted at work was the ability to use wildcards to match repository_dispatch event names:

    on:
      repository_dispatch:
        - security_scan
        - security_scan::*

Why would you want to do this?

We centralize our release pipelines as it's the only way to force repositories through a defined reusable workflow (we don't want our product teams to have to maintain them).

This allows us to dispatch an event like so:

    {
      "event_type": "security_scan::$product_name::$version",
      "client_payload": {
        "field": "value"
      }
    }

Then it is far easier to identify which product and version a workflow is running when looking in the Actions tab of our central release repository.