[5563221177]

Logs emitted during the build, or test results, or metrics captured during the build (such as how long it took)... these can all themselves be build outputs.

I've got one where "deploying" means updating a few version strings and image reverences in a different repo. The "build" clones that repo and makes the changes in the necessary spots and makes a commit. Yes, the side effect I want is that the commit gets pushed--which requires my ssh key which is not a build input--but I sort of prefer doing that bit by hand.