Each engineer ranked by how much lasting, central code they authored: lines still alive in today's codebase (surviving lines), each weighted by how many other files depend on the file it lives in (centrality — afferent coupling). Built only from git history; commits and lines written are context, never the score.
Developer Impact Distribution
Centrality of their code (x) against surviving lines (y); bubble size = impact. Median lines split the field — the upper-right quadrant, central and long-lived, is the highest impact. Scroll to zoom, drag to pan.
Leaderboard
Click a row or dot to inspect the work behind the score. Written & pull requests are shown for context only.
Impact distribution
Impact is steeply concentrated — most contributors sit near zero; the top few stand far out on the tail (gold).
Evidence — why they rank here
The real code behind the score — check any finding by eye.