Fan-In Health & RMS (14%)

Incoming Concentration & Hub Fragility

High fan-in indicates that many components depend on a single file or symbol. While foundational utilities naturally have high fan-in, extreme incoming concentration makes modifications high-risk.

Similar to Fan-Out, CodeGraph computes Root Mean Square Fan-In:

1
2
3
4
5
const averageFanIn = totalFanIn / nodeIds.length;
const rootMeanSquareFanIn = Math.sqrt(squaredFanIn / nodeIds.length);

const normalizedRisk = 0.5 * rootMeanSquareFanIn;
const score = 100 / (1 + normalizedRisk);