Template resources are cached for a hardcoded amount of time

org.apache.shindig.gadgets.templates.TemplateLibraryFactory.loadTemplateLibrary(GadgetContext, Uri) makes a call to org.apache.shindig.gadgets.http.HttpRequest.setCacheTtl(int) for all requests to fetch template libraries. It sets the cache TTL to 300 seconds (5 minutes) unconditionally.

This should be configurable or should obey caching headers on the response.