MostModify

MostModify is a software tool and data-analysis library designed for repository analytics. It analyzes historical commit data to identify the most modified files and modules within a codebase, providing metrics that describe modification frequency, churn, and impact.

The project centers on Git repositories, with experimental support for other version control systems. Core metrics include modification count, lines added and removed, net churn, and contributor activity, paired with per-file reports and lightweight visualizations.

MostModify originated as an open-source initiative in 2020, created by a community of developers seeking to quantify code churn and maintenance burden. It has since expanded to include an API and integrations with common CI/CD pipelines.

Usage typically involves installing the package, pointing the tool at a repository, and selecting a time window or scope. Outputs include CSV, JSON, or HTML reports, suitable for engineering managers and developers assessing risk and focus areas.

Limitations include dependence on the completeness of history data and commit metadata. The tool measures activity rather than code quality, and large projects may require indexing and configuration tuning.

See also: code churn, software metrics, version control analytics.