Customize `on:` triggers (separate `push` and `pull_request` triggers)

I want to define this trigger in my workflow:

on:
  push:
    branches:
      - main
  pull_request:
    types: [synchronize, opened, reopened]

Or even:

on:
  pull_request:
  merge_group:

Which will run a build on my main branch, and for any pull request activity. Currently a lot of PR's will have the same job running twice (for push and pull_request activity). Is there a way to define this in the GHA plugin?

Start by tracing the GHA plugin configuration that generates the workflow on: block. Compare the requested separate push, pull_request, and merge_group trigger forms, then determine how existing workflow generation tests cover trigger behavior. Done means users can configure these triggers independently without duplicate builds for pull request activity.