Just uploaded to CPAN are Search::OpenSearch 0.21
and Search::OpenSearch::Server 0.20.
These releases add the Tiny JSON response format and the ability to limit your responses to a subset of the available fields.
Now all you minimalists can strip down your Dezi responses to bare bones JSON.
Example:
curl 'http://localhost:5000/search?q=foo&t=Tiny&x='
will return the only the built-in fields with near-zero metadata in the JSON string.