I'm sure I got a GitHub Action syntax error for writing 'main' instead "main" for a conditional check that the local "act" tool didn't pick up, the development

I'm sure I got a GitHub Action syntax error for writing 'main' instead "main" for a conditional check that the local "act" tool didn't pick up, the development feedback loop was infuriating... How are people able to piece together such complex GitHub Actions? Does GitHub have to deal with this internally as well or they just haven't gotten around to releasing dev tools yet?