What Changes the Most: git log --format=format: --name-only --since="1 year ago" | sort | uniq -c | sort -nr | head -20

The 20 most-changed files in the last year. The file at the top is almost always the one people warn me about. “Oh yeah, that file. Everyone’s afraid to touch it.”

Who Built This: git shortlog -sn --no-merges

Every contributor ranked by commit count. If one person accounts for 60% or more, that’s your bus factor. If they left six months ago, it’s a crisis. If the top contributor from the overall shortlog doesn’t appear in a 6-month window (git shortlog -sn --no-merges --since="6 months ago"), I flag that to the client immediately.

Where Do Bugs Cluster: git log -i -E --grep="fix|bug|broken" --name-only --format='' | sort | uniq -c | sort -nr | head -20

Same shape as the churn command, filtered to commits with bug-related keywords

Is This Project Accelerating or Dying: git log --format='%ad' --date=format:'%Y-%m' | sort | uniq -c

Commit count by month, for the entire history of the repo

How Often Is the Team Firefighting: git log --oneline --since="1 year ago" | grep -iE 'revert|hotfix|emergency|rollback'

Revert and hotfix frequency