https://kmaxat.com/ Reproducible notes on software architecture: the papers behind the metrics, diagrams that explain them, and measurements from real codebases. en https://kmaxat.com/blog/code-ownership-measured.html https://kmaxat.com/blog/code-ownership-measured.html Fri, 18 Sep 2026 00:00:00 +0000 I measured historical contribution concentration before a six-month holdout in five repositories. The added signal beyond size and activity was uneven. https://kmaxat.com/blog/conways-law-measured.html https://kmaxat.com/blog/conways-law-measured.html Wed, 05 Aug 2026 00:00:00 +0000 I measured contributor-to-module alignment against shuffled activity baselines in five repositories. Three finished above their intervals; two did not. https://kmaxat.com/blog/code-hotspots.html https://kmaxat.com/blog/code-hotspots.html Mon, 03 Aug 2026 00:00:00 +0000 I ranked large, frequently changed files from 18 months of history, then tested the shortlist against six months of later bug-fix activity. https://kmaxat.com/blog/change-coupling.html https://kmaxat.com/blog/change-coupling.html Sun, 26 Jul 2026 00:00:00 +0000 Files that change together in commits are coupled whether or not they import each other: the co-change graph laid over the import graph for five JavaScript codebases. https://kmaxat.com/blog/architecture-debt.html https://kmaxat.com/blog/architecture-debt.html Tue, 21 Jul 2026 00:00:00 +0000 Coupled file groups, their bug-fix cost per release, and the fitted curve that says whether a debt is accelerating: the ICSE 2016 method, approximated on five JavaScript codebases. https://kmaxat.com/blog/decoupling-level.html https://kmaxat.com/blog/decoupling-level.html Sun, 12 Jul 2026 00:00:00 +0000 The share of a system living in small, independently replaceable modules: the ICSE 2016 metric, approximated from the import graphs of eleven codebases. https://kmaxat.com/blog/propagation-cost.html https://kmaxat.com/blog/propagation-cost.html Sun, 05 Jul 2026 00:00:00 +0000 One number for how far a change can ripple: the 2006 paper that measured Mozilla's redesign, and the same metric computed on eleven codebases today. https://kmaxat.com/blog/fitness-functions.html https://kmaxat.com/blog/fitness-functions.html Sun, 28 Jun 2026 00:00:00 +0000 Where the idea comes from, the problem it solves, a mental model drawn out, examples across seven industries, and an interactive quiz. https://kmaxat.com/blog/modularity-maturity-index.html https://kmaxat.com/blog/modularity-maturity-index.html Sun, 21 Jun 2026 00:00:00 +0000 Its history, its three pillars drawn out, and a demo library broken then fixed to show what each one costs. https://kmaxat.com/blog/salespotter-retrospective.html https://kmaxat.com/blog/salespotter-retrospective.html Thu, 12 Mar 2026 00:00:00 +0000 The bet behind a Dutch retail data platform, the production numbers, and where anti-bot economics made the product impractical.