[cfors]

Not a perfect solution but I add a prompt signaling both my current namespace and cluster, along with some safeguards for any changes on our production environment. In practice I haven't deployed something wrongfully in production ever.

I use a custom written script but I've used this one in the past - its pretty nice.

https://github.com/jonmosco/kube-ps1/blob/master/kube-ps1.sh

[majewsky]

I have a prompt display as well, but to my own dismay, earlier that year, I applied some QA config to a prod system. (It did not cause substantial harm, thankfully.) After that, I changed my prompt display so that names of productive regions are highlighted with red background. That seems to really help in situations of diminished attentiveness from what I can tell.