[randartie]

Seems like this story is being received pretty well here.

Though, in my opinion I think it's kind of insulting to be asked something like "What did you learn?". The question isn't really necessary. You know that you screwed up.

That kind of dynamic between an engineer and a team lead is off-putting to me.

I think the proper way for a team lead to handle it is to instead work with the engineer to help find ways to eliminate the human error by implementing tooling or processes. The conversation should go something like this:

Lead: "I wonder how we can make sure none of us break XYZ widget again"

Engineer: "We can build out ABC and run that, also generally just test better before pushing to prod".

Lead: "Cool, do you want to go ahead and take care of that?"