LOC Report

One script, scripts/loc/loc_history.py, answers two related questions:

• breakdown - how much Swift code exists right now, grouped into SPM modules, the main app, app extensions, and the watch app, split prod vs test (working-tree snapshot).
• chart - how that has grown over git history, rendered as the production-vs-test line chart embedded in documentation/Module-Architecture.md (the "Codebase size" section).

Run it

python3 scripts/loc/loc_history.py            # breakdown table, then refresh the chart
python3 scripts/loc/loc_history.py breakdown  # snapshot table only (read-only, no file writes)
python3 scripts/loc/loc_history.py chart      # refresh CSV + SVG + PNG only

Pure stdlib; the PNG step shells out to rsvg-convert (brew install librsvg). If it is missing, the script prints the exact manual conversion command and still writes the CSV + SVG.

Counting rule

A "line of code" is a non-blank Swift source line that does not start with //. Package.swift manifests are ignored. A file is test when it sits under a *Tests directory, under the TestUtilities module, or its name ends Tests.swift / Spec(s).swift; otherwise prod. Both lenses share this rule, so the breakdown's grand total reconciles with the chart's latest data point (small drift = uncommitted working-tree edits).

This is a different lens from cloc: it does not strip /* ... */ block comments, so totals run slightly higher than a cloc count. That is intentional - it keeps the snapshot consistent with the historical chart, which has always used this rule.

Outputs and where they live

File	Tracked?	Purpose
scripts/loc/loc_history.py	yes	the script
scripts/loc/loc_history.csv	yes	per-day date,loc_prod,loc_test, regenerated from git history each run
scripts/loc/loc_history.svg	yes	intermediate render
documentation/assets/loc_history.png	yes	the committed chart, embedded by documentation/Module-Architecture.md

The chart walks git log, sampling the last commit of each calendar day, so a refresh only adds a new point once today's work is committed. The working-tree breakdown, by contrast, reflects uncommitted changes immediately.

When refreshing the chart, also

• Commit documentation/assets/loc_history.png alongside the change that moved the LOC - it is the artifact the docs render. The CSV/SVG update too; commit them for an inspectable trail.
• Re-check the prose in documentation/Module-Architecture.md ("Codebase size" intro). It says ~57k-line production codebase; bump that figure if production crosses a round number.
• This is the chore behind past Update LOC history chart commits - run it after a modularization extraction or a test-coverage push so the chart stays current.