The Modules Manifest

Each bundle contains its own manifest. However, after compilation, the manifest remains a separate file that doesn't get included with the bundle's compiled code.

Instead, after all bundles are built, all the bundle manifests are collated to produce a singular JSON file that is written to build/modules.json.

When js-slang tries to load Source modules, it first checks the module manifest for information about that module, like what tabs if any it should load.