Code churn
Lines that are rewritten or deleted shortly after being written (typically within two weeks); a proxy for code that was not right the first time.
Churn rises when code is accepted quickly and fixed later, which is the failure mode of 'almost right' AI suggestions — 66% of developers name it their top frustration and 45% say debugging AI code takes longer (Stack Overflow 2025). GitClear tracks churn alongside cloning as the two quality signals most affected by assistants.