All information about your package resides in a manifest file that is loaded by the host process. It describes the modules in the package, and the files and metadata for each module. For For a manifest to be usable by a retail WinGate, it needs to be signed with the Manifest Prep tool which is found in the tools directory of the SDK. For developing your modules in Developer Mode you do not need to sign your manifest file.
Here is an example manifest file.
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