Code Familiarity score
Code familiarity is measured as the lines of code contributed by current developers vs the lines of code written by developers configured as former contributors (i.e. off-boarded developers). It is measured as the percentage across all files in the codebase.
The higher the percentage of code written by currently active developers, the better:
Knowledge Islands score
Knowledge Islands are measured by identifying all files where at least 95% of the code is written by just one active developer. The number of knowledge island files is then weighted by their lines of code.
The resulting percentage reflects the total number of lines of code in the codebase that are knowledge islands:
