on:
  workflow_call:
    inputs:
      a:
        type: string
        required: true
        default: ${{ github.ref }}
      b:
        type: boolean
        default: 1
    secrets:
      s:
        required: true
      t:
    outputs:
      o:
        value: ${{ jobs.a.outputs.x }}
jobs:
  a:
    runs-on: x
    outputs: {x: 1}
    steps: [{run: a}]