@derived-modular/boundaries

Pure path classifiers for Derived Modular Architecture. No filesystem graph, no ESLint — shared by @derived-modular/cli and @derived-modular/eslint-plugin.

Architecture: DMA spec.

Install

Usually pulled in as a dependency. For custom tooling:

npm install @derived-modular/boundaries

API (high level)

import {
  DEFAULT_COMPOSITION_ROOT_DIRNAMES,
  LAYER_RANK,
  isBarrelIndexFilename,
  isPublicImportTarget,
  layerOfPath,
  moduleRefOfPath,
} from "@derived-modular/boundaries";

PathContext: { srcRoot, compositionRootDirnames } — defaults match DMA (src, ["app","pages","routes"]).

What it classifies

• Structural layer: app | features | services | shared (composition roots = app)
• Module id + layer for features/* and services/* (stage-0 file modules vs directory modules)
• Public vs deep import target (*/public/*, stage-0 files)
• Barrel index.ts / index.tsx candidates

Local development

cd packages/boundaries
bun test
bun run check-types

License

MIT