First PR at the new job got bounced for missing tests and I didn't even know the CI gate existed until it failed on me

Wrote what I thought was a clean small fix, opened the PR feeling pretty good about it, and the pipeline immediately failed on a coverage threshold nobody mentioned in onboarding. Slightly mortifying watching that red X show up in front of the whole team channel. Fixed it in ten minutes once I actually read the failure message instead of panicking, but wish someone had walked me through the gates on day one instead of day four.