Not on the first page because it is not quite functional yet. The Sigil side of reacting to script is not ready yet. The summary widget is just a fake showing input parameters and output <wrapper />.
Scripts for wrapper have to have attribute standalone set to "false" in script manifest. Default is true: means standalone script without wrapper (old scripts should work).
Included are all known to me "wrapped" scripts with manifests, launcher (wrapper) with manifest and new xsd schema for script manifest. The scripts mostly fail.
Bumped up version to 0.0.8: the changes were too big for a small step
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For testing in real environment only.