should postsubmit: false?

Is it being implicit ok? The proto defaults to false for presubmit and postsubmit, and I prefer that as it makes it easier to skim the config as existence of presubmit or postsubmit indicates the target runs on that (albeit you could do postsubmit: false)

I would prefer that either the implicit default be documented in the protobuf, or the config be explicit. The goal being that someone can refer only to the config file and the protobuf and understand what is being built and with what properties.

(the protos did not default to false, updated and added to documentation)

change this to double quotes and no escaped single quote, I believe an upcoming lint will enforce. I know this is copy pasted from my code, I prefer it this way, but the lints have spoken.

Done, thanks for being proactive on the lint!