Antipattern Index

Structural and relational antipatterns detected across 119 open-source repositories. Each pattern links to all repos where it appears, sorted by activity-weighted risk.

Tier 1 — Structural

Derived from function-level metrics: cyclomatic complexity, nesting depth, fan-out, and length.

exit_heavy 114 repos

Exit Heavy avg risk 6.4

long_function 110 repos

Long Function avg risk 6.2

god_function 109 repos

God Function avg risk 6.3

complex_branching 108 repos

Complex Branching avg risk 6.7

deeply_nested 101 repos

Deeply Nested avg risk 6.7

Tier 2 — Relational & Temporal

Derived from call-graph structure, git history, and neighbor relationships.

stale_complex 11 repos

Stale Complex avg risk 5.5

hub_function 6 repos

Hub Function avg risk 3.5

cyclic_hub 5 repos

Cyclic Hub avg risk 4.9

neighbor_risk 2 repos

Neighbor Risk