I’m less interested in “objective good” and more in “I know I have agreed to something and I am not doing it for [reasons]”.

I wonder how the poster feels about telling his employer about his decision to stop working on some days? Maybe he would be fine with it?

Again I don’t care about his employer, it could be the biggest prick in existence and deserving of whatever ugly came to him. This is about your own soul, so to speak.