git rhythm

commit heat — day × hour
less
more
by hour of day
by weekday
weekly commits
monthly volume
commit type breakdown
rework rate
commit size distribution
commit message quality
bus factor by directory unique authors per folder
author × directory matrix commit density
file hotspots by commit count
co-change coupling files that move together
contribution inequality
author tenure
new contributor cohorts authors by first commit month
work-life balance trend
commit message length trend
commit weight by hour avg lines changed
release cadence
directory freshness days since last commit
calendar heatmap — last 52 weeks
busiest days on record