Yup, this was it! Derp. I need to pair more

The contains thing was weird though. I swear I copied that from the terminal, but when I put the code back to what I had, now I get much more helpful error about undefined variable arg. At least that probably would have pointed me in the right direction.

For posterity, this worked like a champ:

    read :query do
      argument :query, :string, allow_nil?: false

      filter expr(contains(string_downcase(name), string_downcase(^arg(:query))))
    end

I’m sure this can be cleaned up a little, but in case someone stumbles upon this looking for the example I was looking for its a start.