Bower and npm Registry Interoperability: Scoped Packages and Transitive Dependencies

When a legacy Bower project adopts the bower-npm-resolver plugin to fetch packages from the npm registry, the integration boundary between Bower's bower.json and npm's package structure becomes critical. Bower's naming convention does not support npm scoped packages (e.g., @scope/pkg), and its dependency resolution does not traverse transitive npm dependencies.

The plugin claims to handle semver ranges, but the exact mapping between Bower's range syntax and npm's caret/tilde ranges is unclear. Additionally, npm packages may rely on lifecycle scripts or postinstall hooks that Bower ignores.

For a team planning a gradual migration, the key questions are: How should scoped npm packages be declared in bower.json to work with bower-npm-resolver? Does Bower install the full dependency tree of an npm package, or only the top-level package, leaving transitive dependencies unresolved? And what are the practical implications for version range translation between the two ecosystems?