displays whether cookbooks are frozen on the chef server for a given version. put this in ~/.chef/plugins/knife.

cbfrozen.rb

#
# Author: Joshua Timberman <joshua@opscode.com>
# Copyright (c) 2013, Opscode, Inc <legal@opscode.com>
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# displays whether cookbooks are frozen on the chef server for a given
# version.

require 'chef/knife'

module KnifePlugins
  class Cbfrozen < Chef::Knife
    banner "knife cbfrozen [COOKBOOK] [VERSION]"

    def run
      if @name_args.size == 0
        rest.get_rest("cookbooks").each_pair do |cookbook, an_hash|
          ui.output "#{cookbook}: #{cookbook_frozen(cookbook)}"
        end
      else
        cookbook_name = @name_args[0]
        cookbook_version = @name_args.length > 1 ? @name_args[1] : '_latest'
        ui.output "#{cookbook_name}: #{cookbook_frozen(cookbook_name, cookbook_version)}"
      end
    end

    def cookbook_frozen(cb, ver = '_latest')
      rest.get_rest("cookbooks/#{cb}/#{ver}").frozen_version?
    end
  end
end

thanks!