diff --git a/src/cligen.cr b/src/cligen.cr
index 354f06c..e799265 100644
--- a/src/cligen.cr
+++ b/src/cligen.cr
@@ -44,21 +44,21 @@ module CliGen
     {{parser}}.invalid_option{|opt|
       case opt
       when /^-+[a-z-]+/
-        Logger.debug "#{CliGen::APPNAME} : ERROR : {{parser}} : invalid_option : Inavlid option provided #{opt}"
+        STDERR.puts "#{CliGen::APPNAME} : ERROR : {{@type.name}} : {{parser}} : invalid_option : Inavlid option provided #{opt}"
       else
-        abort "#{CliGen::APPNAME} : ERROR : {{parser}} : invalid_option : Inavlid option provided #{opt}"
+        abort "#{CliGen::APPNAME} : ERROR : {{@type.name}} : {{parser}} : invalid_option : Inavlid option provided #{opt}"
       end
     }
     {{parser}}.missing_option{|opt|
-      abort "ERROR : {{parser}} : missing_option : Argument was not provided to #{opt}"
+      abort "ERROR : {{@type.name}} : {{parser}} : missing_option : Argument was not provided to #{opt}"
     }
     {{parser}}.unknown_args{|opt|
       unless opt.empty?
         case opt.first
         when /^-+[a-z-]+$/
-          Logger.debug "ERROR : {{parser}} : unknown_args : #{opt} not a configured argument"
+          STDERR.puts "ERROR : {{@type.name}} : {{parser}} : unknown_args : #{opt} not a configured argument"
         else
-          abort "ERROR : {{parser}} : unknown_args : #{opt} not a configured argument"
+          abort "ERROR : {{@type.name}} : {{parser}} : unknown_args : #{opt} not a configured argument"
         end
       end
     }
diff --git a/src/command.cr b/src/command.cr
index 0697698..0908c47 100644
--- a/src/command.cr
+++ b/src/command.cr
@@ -14,6 +14,9 @@ module CliGen
   annotation CommandArgument
   end
 
+  annotation CommandSelection
+  end
+ 
   annotation SubCommand
   end
 
@@ -23,13 +26,18 @@ module CliGen
 
 
     macro inherited
+      {% verbatim do %}
       macro finished
         define_actions
         define_header
+        {% anno = @type.annotation(::CliGen::CommandInfo) %}
+        {% unless anno[:def_runner] == false %}
         define_runner
+        {% end %}
         define_parser
         define_action_setter
       end
+      {% end %}
     end
 
     macro define_actions
@@ -40,6 +48,7 @@ module CliGen
     macro define_header
       {% name = @type.name.split("::").last.downcase.id %}
       {% info_annos = @type.class.methods.select(&.annotation(::CliGen::SubCommand)).map(&.annotation(::CliGen::SubCommand)) %}
+      {% info_annos += @type.class.methods.select(&.annotation(::CliGen::CommandSelection)).map(&.annotation(::CliGen::CommandSelection)) %}
       {% examples = [] of StringLiteral %}
       {% info_annos.select(&.[](:examples)).map(&.[](:examples).resolve).each(&.each{|example| examples << example}) %}
       HEADER = [
@@ -55,9 +64,28 @@ module CliGen
       ].join("\n")
     end
 
-    macro define_argument(arg_name, variable = nil, type = String, short = "", long = "", description = nil, subtype = Nil, format = nil, check = nil, def_getter = false, default = nil, logger = nil)
-      {% raise "define_argument : You must provide a format or set it to \"auto\" to use builtin formats when defining a Time argument" if type.id.stringify == "Time" && format == nil %}
-      {% raise "define_argument : You MUST provide a description" unless description %}
+    macro define_selection(selection_name, short = "", long = "", description = nil, default = "", values = [] of StringLiteral)
+      {% if values.is_a? Path %}
+        {% values = values.resolve %}
+      {% end %}
+      {% raise "ERROR : define_selection : You MUST provide a description" unless description %}
+      {% raise "ERROR : define_selection : You must provide a valid set of values in Array(String) format" if values.empty? %}
+      {% description = "#{description.id} (valid: #{values.join(", ").id})" %}
+      {% unless default.empty? %}
+        {% description = "#{description.id} (default: #{default.id})" %}
+      {% end %}
+      @@{{selection_name}} : String = {{default}}
+
+      @[::CliGen::CommandArgument(short: {{short}}, long: {{long}}, description: {{description}} )]
+      def self.{{selection_name}}= (selection : String)
+        raise "ERROR : {{selection_name}} : Invalid Selection(#{selection}) (valid: {{values.map(&.id).join(", ").id}})" unless {{values}}.includes?(selection)
+        @@{{selection_name}} = selection
+      end
+    end
+
+    macro define_argument(arg_name, variable = nil, type = String, short = "", long = "", description = nil, subtype = Nil, format = nil, check = nil, def_getter = false, default = nil, logger = nil, &block?)
+      {% raise "ERROR : define_argument : You must provide a format or set it to \"auto\" to use builtin formats when defining a Time argument" if type.id.stringify == "Time" && format == nil %}
+      {% raise "ERROR : define_argument : You MUST provide a description" unless description %}
       {% variable = arg_name unless variable %} 
       {% _type = type.id.stringify %}
       {% _subtype = subtype.id.stringify %}
@@ -86,7 +114,7 @@ module CliGen
         {{check}}(var)
         {% end %}
 
-        {% if format %}
+        {% if format != "auto" && format %}
         abort "ERROR : Action : {{arg_name}} : Incorrect format for provided data #{var}" unless var =~ {{format}}
         {% end %}
         ## If a logger method has been provided by the user
@@ -132,13 +160,22 @@ module CliGen
           {% end %}
         {% end %}
 
+        {% selections = @type.class.methods.select(&.annotation(::CliGen::CommandSelection)) %}
         {% methods = @type.class.methods.select(&.annotation(::CliGen::SubCommand)) %}
-        {% raise "ERROR : No commands defined for #{@type.name}" if methods.empty? %}
+        {% raise "ERROR : No commands or selections defined for #{@type.name}" if methods.empty? && selections.empty? %}
+        {% raise "ERROR : Can't define both selections and commands for work in #{@type.name}" if ! methods.empty? && ! selections.empty? %}
+        {% var = methods.empty? ? nil : "action" %}
+        {% targets = methods.empty? ? selections : methods %}
+        {% if targets == selections %}
+          {% selectors = selections.map(&.annotation(::CliGen::CommandSelection)).map(&.[:selector]).uniq %}
+          {% raise "ERROR : Can't provide more than a single selector for runner" if selectors.size > 1 %}
+          {% var = selectors.first %}
+        {% end %}
         {% begin %}
-        case @@action
-        {% for method in methods %}
-        when {{method.name.stringify}}
-          {{method.name}}
+        case @@{{var.id}}
+        {% for target in targets %}
+        when {{target.name.stringify}}
+          {{target.name}}
         {% end %}
         else
           abort "ERROR : No action provided to command {{@type.name}}"
diff --git a/src/command/parser.cr b/src/command/parser.cr
index 649aa76..11774f0 100644
--- a/src/command/parser.cr
+++ b/src/command/parser.cr
@@ -7,11 +7,24 @@ module CliGen::Parser
         {% puts "#{@type.name} OptionParser is being generated" %}
         {% name = @type.name.split("::").last %}
         {% var = name.downcase %}
+        {% methods = @type.class.methods %}
         {% info = @type.annotation(::CliGen::CommandInfo) %}
         {% raise "ERROR : No CommandInfo annotation provided to {{@type.name}}" unless info %}
         subparser = OptionParser.new do |parser|
           parser.banner = {{@type.name}}::HEADER
-          {% subcommands = @type.class.methods.select(&.annotation(::CliGen::SubCommand)) %}
+
+          {% selections = methods.select(&.annotation(::CliGen::CommandSelection)) %}
+          {% if selections.size > 0 %}
+            CliGen.define_section("Selections", parser)
+            {% for selection in selections %}
+              {% selection_anno = selection.annotation(::CliGen::CommandSelection) %}
+              parser.on({{selection.name.stringify}}, {{selection_anno[:description]}}){
+                {{@type.name}}.{{selection_anno[:selector]}}= {{selection.name.stringify}}
+              }
+            {% end %}
+          {% end %}
+
+          {% subcommands = methods.select(&.annotation(::CliGen::SubCommand)) %}
           {% if subcommands.size > 0 %}
             CliGen.define_section("Subcommands", parser)
             {% for subcommand in subcommands %}
@@ -22,7 +35,7 @@ module CliGen::Parser
             {% end %}
           {% end %}
 
-          {% arguments =  @type.class.methods.select(&.annotation(::CliGen::CommandArgument)) %}
+          {% arguments =  methods.select(&.annotation(::CliGen::CommandArgument)) %}
           {% if arguments.size > 0 %}
             CliGen.define_section("Provide Arguments", parser)
             {% for argument in arguments %}
@@ -41,7 +54,10 @@ module CliGen::Parser
           CliGen.define_default_flags(parser)
         end
         parent_parser.on({{var}}, {{info[:description]}}){
-          ARGV.delete({{var}})
+          raise "ERROR : {{var.id}} not found in ARGV" unless i = ARGV.index({{var}})
+          ## Removing all preceeding arguments so that only the actual required 
+          ## args for the next command are present
+          ARGV.shift(i+1)
           abort subparser if ARGV.empty?
           subparser.parse
           {{@type.name}}.run