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!






















