Webpack helper
The webpack helper builds the editor runtime of your theme or plugin, your editor and view scripts, the shared modules and the stylesheet. Your webpack.config.js calls it:
Until 0.15 the helper was required by its path, ./vendor/saij/wp-app-framework/webpack.config.js; that still works.
Conventions
#shared/* needs the entry "imports": { "#shared/*": "./assets/shared/*.js" } in your package.json. The framework's own scripts go to build/vendor/wp-app-framework/. See Editor for the complete list, the script handles and the errors of the helper, and Front-end scripts and Styles.