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Yup, any destructive production change, I always bring in another engineer as a lifeguard. Call out the environment you're on, the machine you're shelled into, and the action you're performing. Can even be an engineering-adjacent role as well.

I do that on Slack—sometimes with a coworker keenly following along, and sometimes when I'm the only one awake.

That is a good idea: to do it in Slack even if no one is there. Forces you to slow down and be conscious of what you are doing.

This is a great tip. I'm going to start using this.