AtomVM Supervisor issue

Wow. I was in pain almost 2 days straight, just the moment I post this question, GPT-5 solved issue:

child =
      {:light, {:"Elixir.Light", :start_link, []}, :permanent, :brutal_kill, :worker,
       [:"Elixir.Light"]}

This saved my life. The official repo was for 0.7.0-dev sort of, and my esp32 was running 0.6.6 stable release, which didn’t support some args!