Packs ECMAScript/CommonJs/AMD modules for the browser. Allows you to split your codebase into multiple bundles, which can be loaded on demand. Supports loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.
Types for working with the Sourcegraph extension API. Extensions should use the 'sourcegraph' package, not this package. This package is only for client applications that embed Sourcegraph extensions and need to communicate with them.