`src/index.ts` held the installer, the manager, the view fold, and every
helper in one 1100-line file. It is now the package API alone, re-exporting
from `installer.ts` (pnpm runs, the probe cache, post-install checks),
`manager.ts` (every operation over the booted profile and the mutex),
`view.ts` (the package view fold and the row-ownership walk the dependents
query shares), `modules.ts` (declared-module row naming and views), and
`helpers.ts` (the diagnostic prefix, tooling bounds, spawn seam, and manifest
readers). The public surface, the tests, and the failure codes are unchanged.
Yichen Jiang