# .github/workflows/reusable.yaml
on:
  workflow_call:
    inputs:
      INPUT_UPPER:
        type: string
      input_lower:
        type: string
    secrets:
      SECRET_UPPER:
      secret_lower:
...

# .github/workflows/test.yaml
...

jobs:
  caller:
    uses: ./.github/workflows/reusable.yaml
    # Inputs and secrets are case-insensitive. So all the followings should be OK
    with:
      input_upper: ...
      INPUT_LOWER: ...
    secrets:
      secret_upper: ...
      SECRET_LOWER: ...