Every bug found and fixed β with the root cause, not just βfixedβ.
βIt's fixedβ is a claim, not evidence. Without the root cause written down, the same bug comes back wearing a different hat.
A running log of every defect: error code, what broke, why it broke, what changed, and how it was tested. Each entry carries a status β OPEN, FIXED or VERIFIED β and VERIFIED means someone actually looked at it live, not that the code was merged.