package.json field scandipwa.type equal to extension. For example:@namespace magic comments must have a scandipwa block declared in its package.json file. Otherwise, the @namespace magic comments will not be handled correctly during the build time, hence will not work.scandipwa.extensions object of package.json . The extension must be a valid NPM package, therefore you are required to add it into dependencies field of your package.json. Like so:packages folder and register it in your current theme. It will be symlinked from packages to proper folder under node_modules.trueor false as a value of the extension key in scandipwa.extensions . Your theme can control enabled extensions across the whole application. This allows to disable the previously enabled extension. The sequence of preference in this case is: