diff --git a/generate_args.exs b/generate_args.exs
index 8df68a0f..2ac71fdd 100644
--- a/generate_args.exs
+++ b/generate_args.exs
@@ -6,7 +6,7 @@ defmodule Farmbot.CeleryScript.AST.Arg.<%= arg %> do
   @moduledoc false
   @behaviour Farmbot.CeleryScript.AST.Arg
 
-  def verify(_), do: :ok
+  def verify(val), do: {:ok, val}
 end
 """
 
@@ -28,7 +28,6 @@ end
 for node <- nodes do
   camel_node = Macro.camelize(node["name"])
   allowed_args = Map.get(node, "allowed_args") |> Enum.map(fn(arg_str) -> ":#{arg_str}" end) |> Enum.join(", ")
-  IO.puts "#{node["name"]} => #{allowed_args}"
   str = EEx.eval_string(node_template, [allowed_args: allowed_args, node: camel_node])
   File.write!("lib/farmbot/celery_script/ast/node/#{node["name"]}.ex", str)
   # |> Code.eval_string()
diff --git a/lib/farmbot/celery_script/ast/arg/_else.ex b/lib/farmbot/celery_script/ast/arg/_else.ex
index 1ae19329..284d7b30 100644
--- a/lib/farmbot/celery_script/ast/arg/_else.ex
+++ b/lib/farmbot/celery_script/ast/arg/_else.ex
@@ -2,5 +2,5 @@ defmodule Farmbot.CeleryScript.AST.Arg.Else do
   @moduledoc false
   @behaviour Farmbot.CeleryScript.AST.Arg
 
-  def verify(_), do: :ok
+  def verify(val), do: {:ok, val}
 end
diff --git a/lib/farmbot/celery_script/ast/arg/_then.ex b/lib/farmbot/celery_script/ast/arg/_then.ex
index 6d5b61ca..31c9cb7a 100644
--- a/lib/farmbot/celery_script/ast/arg/_then.ex
+++ b/lib/farmbot/celery_script/ast/arg/_then.ex
@@ -2,5 +2,5 @@ defmodule Farmbot.CeleryScript.AST.Arg.Then do
   @moduledoc false
   @behaviour Farmbot.CeleryScript.AST.Arg
 
-  def verify(_), do: :ok
+  def verify(val), do: {:ok, val}
 end
diff --git a/lib/farmbot/celery_script/ast/arg/axis.ex b/lib/farmbot/celery_script/ast/arg/axis.ex
index 945b81c0..a17f03f4 100644
--- a/lib/farmbot/celery_script/ast/arg/axis.ex
+++ b/lib/farmbot/celery_script/ast/arg/axis.ex
@@ -2,5 +2,5 @@ defmodule Farmbot.CeleryScript.AST.Arg.Axis do
   @moduledoc false
   @behaviour Farmbot.CeleryScript.AST.Arg
 
-  def verify(_), do: :ok
+  def verify(val), do: {:ok, val}
 end
diff --git a/lib/farmbot/celery_script/ast/arg/channel_name.ex b/lib/farmbot/celery_script/ast/arg/channel_name.ex
index 65255d3a..3b8b6c12 100644
--- a/lib/farmbot/celery_script/ast/arg/channel_name.ex
+++ b/lib/farmbot/celery_script/ast/arg/channel_name.ex
@@ -2,5 +2,5 @@ defmodule Farmbot.CeleryScript.AST.Arg.ChannelName do
   @moduledoc false
   @behaviour Farmbot.CeleryScript.AST.Arg
 
-  def verify(_), do: :ok
+  def verify(val), do: {:ok, val}
 end
diff --git a/lib/farmbot/celery_script/ast/arg/is_outdated.ex b/lib/farmbot/celery_script/ast/arg/is_outdated.ex
index 9707732f..35d77d6e 100644
--- a/lib/farmbot/celery_script/ast/arg/is_outdated.ex
+++ b/lib/farmbot/celery_script/ast/arg/is_outdated.ex
@@ -2,5 +2,5 @@ defmodule Farmbot.CeleryScript.AST.Arg.IsOutdated do
   @moduledoc false
   @behaviour Farmbot.CeleryScript.AST.Arg
 
-  def verify(_), do: :ok
+  def verify(val), do: {:ok, val}
 end
diff --git a/lib/farmbot/celery_script/ast/arg/label.ex b/lib/farmbot/celery_script/ast/arg/label.ex
index c455b9b4..03733f0b 100644
--- a/lib/farmbot/celery_script/ast/arg/label.ex
+++ b/lib/farmbot/celery_script/ast/arg/label.ex
@@ -2,5 +2,5 @@ defmodule Farmbot.CeleryScript.AST.Arg.Label do
   @moduledoc false
   @behaviour Farmbot.CeleryScript.AST.Arg
 
-  def verify(_), do: :ok
+  def verify(val), do: {:ok, val}
 end
diff --git a/lib/farmbot/celery_script/ast/arg/lhs.ex b/lib/farmbot/celery_script/ast/arg/lhs.ex
index a3a9d2a8..9b198d38 100644
--- a/lib/farmbot/celery_script/ast/arg/lhs.ex
+++ b/lib/farmbot/celery_script/ast/arg/lhs.ex
@@ -2,5 +2,5 @@ defmodule Farmbot.CeleryScript.AST.Arg.Lhs do
   @moduledoc false
   @behaviour Farmbot.CeleryScript.AST.Arg
 
-  def verify(_), do: :ok
+  def verify(val), do: {:ok, val}
 end
diff --git a/lib/farmbot/celery_script/ast/arg/location.ex b/lib/farmbot/celery_script/ast/arg/location.ex
index 7eee2ffb..a3a19ab7 100644
--- a/lib/farmbot/celery_script/ast/arg/location.ex
+++ b/lib/farmbot/celery_script/ast/arg/location.ex
@@ -2,5 +2,5 @@ defmodule Farmbot.CeleryScript.AST.Arg.Location do
   @moduledoc false
   @behaviour Farmbot.CeleryScript.AST.Arg
 
-  def verify(_), do: :ok
+  def verify(val), do: {:ok, val}
 end
diff --git a/lib/farmbot/celery_script/ast/arg/message.ex b/lib/farmbot/celery_script/ast/arg/message.ex
index 21ae6352..c43d05d0 100644
--- a/lib/farmbot/celery_script/ast/arg/message.ex
+++ b/lib/farmbot/celery_script/ast/arg/message.ex
@@ -2,5 +2,5 @@ defmodule Farmbot.CeleryScript.AST.Arg.Message do
   @moduledoc false
   @behaviour Farmbot.CeleryScript.AST.Arg
 
-  def verify(_), do: :ok
+  def verify(val), do: {:ok, val}
 end
diff --git a/lib/farmbot/celery_script/ast/arg/message_type.ex b/lib/farmbot/celery_script/ast/arg/message_type.ex
index f51d78bd..7c94daac 100644
--- a/lib/farmbot/celery_script/ast/arg/message_type.ex
+++ b/lib/farmbot/celery_script/ast/arg/message_type.ex
@@ -2,5 +2,5 @@ defmodule Farmbot.CeleryScript.AST.Arg.MessageType do
   @moduledoc false
   @behaviour Farmbot.CeleryScript.AST.Arg
 
-  def verify(_), do: :ok
+  def verify(val), do: {:ok, val}
 end
diff --git a/lib/farmbot/celery_script/ast/arg/milliseconds.ex b/lib/farmbot/celery_script/ast/arg/milliseconds.ex
index e6050806..c23e8996 100644
--- a/lib/farmbot/celery_script/ast/arg/milliseconds.ex
+++ b/lib/farmbot/celery_script/ast/arg/milliseconds.ex
@@ -2,5 +2,5 @@ defmodule Farmbot.CeleryScript.AST.Arg.Milliseconds do
   @moduledoc false
   @behaviour Farmbot.CeleryScript.AST.Arg
 
-  def verify(_), do: :ok
+  def verify(val), do: {:ok, val}
 end
diff --git a/lib/farmbot/celery_script/ast/arg/offset.ex b/lib/farmbot/celery_script/ast/arg/offset.ex
index 021f3250..b2144183 100644
--- a/lib/farmbot/celery_script/ast/arg/offset.ex
+++ b/lib/farmbot/celery_script/ast/arg/offset.ex
@@ -2,5 +2,5 @@ defmodule Farmbot.CeleryScript.AST.Arg.Offset do
   @moduledoc false
   @behaviour Farmbot.CeleryScript.AST.Arg
 
-  def verify(_), do: :ok
+  def verify(val), do: {:ok, val}
 end
diff --git a/lib/farmbot/celery_script/ast/arg/op.ex b/lib/farmbot/celery_script/ast/arg/op.ex
index 7078acbb..65420596 100644
--- a/lib/farmbot/celery_script/ast/arg/op.ex
+++ b/lib/farmbot/celery_script/ast/arg/op.ex
@@ -2,5 +2,5 @@ defmodule Farmbot.CeleryScript.AST.Arg.Op do
   @moduledoc false
   @behaviour Farmbot.CeleryScript.AST.Arg
 
-  def verify(_), do: :ok
+  def verify(val), do: {:ok, val}
 end
diff --git a/lib/farmbot/celery_script/ast/arg/package.ex b/lib/farmbot/celery_script/ast/arg/package.ex
index cc305e0f..c3467efa 100644
--- a/lib/farmbot/celery_script/ast/arg/package.ex
+++ b/lib/farmbot/celery_script/ast/arg/package.ex
@@ -2,5 +2,5 @@ defmodule Farmbot.CeleryScript.AST.Arg.Package do
   @moduledoc false
   @behaviour Farmbot.CeleryScript.AST.Arg
 
-  def verify(_), do: :ok
+  def verify(val), do: {:ok, val}
 end
diff --git a/lib/farmbot/celery_script/ast/arg/pin_mode.ex b/lib/farmbot/celery_script/ast/arg/pin_mode.ex
index eff1fd32..63f72848 100644
--- a/lib/farmbot/celery_script/ast/arg/pin_mode.ex
+++ b/lib/farmbot/celery_script/ast/arg/pin_mode.ex
@@ -2,5 +2,5 @@ defmodule Farmbot.CeleryScript.AST.Arg.PinMode do
   @moduledoc false
   @behaviour Farmbot.CeleryScript.AST.Arg
 
-  def verify(_), do: :ok
+  def verify(val), do: {:ok, val}
 end
diff --git a/lib/farmbot/celery_script/ast/arg/pin_number.ex b/lib/farmbot/celery_script/ast/arg/pin_number.ex
index fbc1c179..1efbae51 100644
--- a/lib/farmbot/celery_script/ast/arg/pin_number.ex
+++ b/lib/farmbot/celery_script/ast/arg/pin_number.ex
@@ -2,5 +2,5 @@ defmodule Farmbot.CeleryScript.AST.Arg.PinNumber do
   @moduledoc false
   @behaviour Farmbot.CeleryScript.AST.Arg
 
-  def verify(_), do: :ok
+  def verify(val), do: {:ok, val}
 end
diff --git a/lib/farmbot/celery_script/ast/arg/pin_value.ex b/lib/farmbot/celery_script/ast/arg/pin_value.ex
index c4f97542..e0535cfd 100644
--- a/lib/farmbot/celery_script/ast/arg/pin_value.ex
+++ b/lib/farmbot/celery_script/ast/arg/pin_value.ex
@@ -2,5 +2,5 @@ defmodule Farmbot.CeleryScript.AST.Arg.PinValue do
   @moduledoc false
   @behaviour Farmbot.CeleryScript.AST.Arg
 
-  def verify(_), do: :ok
+  def verify(val), do: {:ok, val}
 end
diff --git a/lib/farmbot/celery_script/ast/arg/pointer_id.ex b/lib/farmbot/celery_script/ast/arg/pointer_id.ex
index 26168778..41a22001 100644
--- a/lib/farmbot/celery_script/ast/arg/pointer_id.ex
+++ b/lib/farmbot/celery_script/ast/arg/pointer_id.ex
@@ -2,5 +2,5 @@ defmodule Farmbot.CeleryScript.AST.Arg.PointerId do
   @moduledoc false
   @behaviour Farmbot.CeleryScript.AST.Arg
 
-  def verify(_), do: :ok
+  def verify(val), do: {:ok, val}
 end
diff --git a/lib/farmbot/celery_script/ast/arg/pointer_type.ex b/lib/farmbot/celery_script/ast/arg/pointer_type.ex
index 1a74def7..51f77fde 100644
--- a/lib/farmbot/celery_script/ast/arg/pointer_type.ex
+++ b/lib/farmbot/celery_script/ast/arg/pointer_type.ex
@@ -2,5 +2,5 @@ defmodule Farmbot.CeleryScript.AST.Arg.PointerType do
   @moduledoc false
   @behaviour Farmbot.CeleryScript.AST.Arg
 
-  def verify(_), do: :ok
+  def verify(val), do: {:ok, val}
 end
diff --git a/lib/farmbot/celery_script/ast/arg/radius.ex b/lib/farmbot/celery_script/ast/arg/radius.ex
index a8348ce1..b4e2faa9 100644
--- a/lib/farmbot/celery_script/ast/arg/radius.ex
+++ b/lib/farmbot/celery_script/ast/arg/radius.ex
@@ -2,5 +2,5 @@ defmodule Farmbot.CeleryScript.AST.Arg.Radius do
   @moduledoc false
   @behaviour Farmbot.CeleryScript.AST.Arg
 
-  def verify(_), do: :ok
+  def verify(val), do: {:ok, val}
 end
diff --git a/lib/farmbot/celery_script/ast/arg/rhs.ex b/lib/farmbot/celery_script/ast/arg/rhs.ex
index b9b5f840..d984d6f4 100644
--- a/lib/farmbot/celery_script/ast/arg/rhs.ex
+++ b/lib/farmbot/celery_script/ast/arg/rhs.ex
@@ -2,5 +2,5 @@ defmodule Farmbot.CeleryScript.AST.Arg.Rhs do
   @moduledoc false
   @behaviour Farmbot.CeleryScript.AST.Arg
 
-  def verify(_), do: :ok
+  def verify(val), do: {:ok, val}
 end
diff --git a/lib/farmbot/celery_script/ast/arg/sequence_id.ex b/lib/farmbot/celery_script/ast/arg/sequence_id.ex
index 937597ff..5be7d4f7 100644
--- a/lib/farmbot/celery_script/ast/arg/sequence_id.ex
+++ b/lib/farmbot/celery_script/ast/arg/sequence_id.ex
@@ -2,5 +2,5 @@ defmodule Farmbot.CeleryScript.AST.Arg.SequenceId do
   @moduledoc false
   @behaviour Farmbot.CeleryScript.AST.Arg
 
-  def verify(_), do: :ok
+  def verify(val), do: {:ok, val}
 end
diff --git a/lib/farmbot/celery_script/ast/arg/speed.ex b/lib/farmbot/celery_script/ast/arg/speed.ex
index ec336f80..9f42fdcf 100644
--- a/lib/farmbot/celery_script/ast/arg/speed.ex
+++ b/lib/farmbot/celery_script/ast/arg/speed.ex
@@ -2,5 +2,5 @@ defmodule Farmbot.CeleryScript.AST.Arg.Speed do
   @moduledoc false
   @behaviour Farmbot.CeleryScript.AST.Arg
 
-  def verify(_), do: :ok
+  def verify(val), do: {:ok, val}
 end
diff --git a/lib/farmbot/celery_script/ast/arg/tool_id.ex b/lib/farmbot/celery_script/ast/arg/tool_id.ex
index 588a4002..f7cee804 100644
--- a/lib/farmbot/celery_script/ast/arg/tool_id.ex
+++ b/lib/farmbot/celery_script/ast/arg/tool_id.ex
@@ -2,5 +2,5 @@ defmodule Farmbot.CeleryScript.AST.Arg.ToolId do
   @moduledoc false
   @behaviour Farmbot.CeleryScript.AST.Arg
 
-  def verify(_), do: :ok
+  def verify(val), do: {:ok, val}
 end
diff --git a/lib/farmbot/celery_script/ast/arg/url.ex b/lib/farmbot/celery_script/ast/arg/url.ex
index 6463b863..046a6a1f 100644
--- a/lib/farmbot/celery_script/ast/arg/url.ex
+++ b/lib/farmbot/celery_script/ast/arg/url.ex
@@ -2,5 +2,5 @@ defmodule Farmbot.CeleryScript.AST.Arg.Url do
   @moduledoc false
   @behaviour Farmbot.CeleryScript.AST.Arg
 
-  def verify(_), do: :ok
+  def verify(val), do: {:ok, val}
 end
diff --git a/lib/farmbot/celery_script/ast/arg/value.ex b/lib/farmbot/celery_script/ast/arg/value.ex
index 48338505..f99f4fd4 100644
--- a/lib/farmbot/celery_script/ast/arg/value.ex
+++ b/lib/farmbot/celery_script/ast/arg/value.ex
@@ -2,5 +2,5 @@ defmodule Farmbot.CeleryScript.AST.Arg.Value do
   @moduledoc false
   @behaviour Farmbot.CeleryScript.AST.Arg
 
-  def verify(_), do: :ok
+  def verify(val), do: {:ok, val}
 end
diff --git a/lib/farmbot/celery_script/ast/arg/version.ex b/lib/farmbot/celery_script/ast/arg/version.ex
index e5bccc52..433645dd 100644
--- a/lib/farmbot/celery_script/ast/arg/version.ex
+++ b/lib/farmbot/celery_script/ast/arg/version.ex
@@ -2,5 +2,5 @@ defmodule Farmbot.CeleryScript.AST.Arg.Version do
   @moduledoc false
   @behaviour Farmbot.CeleryScript.AST.Arg
 
-  def verify(_), do: :ok
+  def verify(val), do: {:ok, val}
 end
diff --git a/lib/farmbot/celery_script/ast/arg/x.ex b/lib/farmbot/celery_script/ast/arg/x.ex
index a8f0b2f4..5f56411a 100644
--- a/lib/farmbot/celery_script/ast/arg/x.ex
+++ b/lib/farmbot/celery_script/ast/arg/x.ex
@@ -2,5 +2,5 @@ defmodule Farmbot.CeleryScript.AST.Arg.X do
   @moduledoc false
   @behaviour Farmbot.CeleryScript.AST.Arg
 
-  def verify(_), do: :ok
+  def verify(val), do: {:ok, val}
 end
diff --git a/lib/farmbot/celery_script/ast/arg/y.ex b/lib/farmbot/celery_script/ast/arg/y.ex
index 9b203fbe..d2c63ad2 100644
--- a/lib/farmbot/celery_script/ast/arg/y.ex
+++ b/lib/farmbot/celery_script/ast/arg/y.ex
@@ -2,5 +2,5 @@ defmodule Farmbot.CeleryScript.AST.Arg.Y do
   @moduledoc false
   @behaviour Farmbot.CeleryScript.AST.Arg
 
-  def verify(_), do: :ok
+  def verify(val), do: {:ok, val}
 end
diff --git a/lib/farmbot/celery_script/ast/arg/z.ex b/lib/farmbot/celery_script/ast/arg/z.ex
index f0f4f020..32def6df 100644
--- a/lib/farmbot/celery_script/ast/arg/z.ex
+++ b/lib/farmbot/celery_script/ast/arg/z.ex
@@ -2,5 +2,5 @@ defmodule Farmbot.CeleryScript.AST.Arg.Z do
   @moduledoc false
   @behaviour Farmbot.CeleryScript.AST.Arg
 
-  def verify(_), do: :ok
+  def verify(val), do: {:ok, val}
 end
diff --git a/lib/farmbot/celery_script/ast/ast.ex b/lib/farmbot/celery_script/ast/ast.ex
index a3aaaa98..8d623983 100644
--- a/lib/farmbot/celery_script/ast/ast.ex
+++ b/lib/farmbot/celery_script/ast/ast.ex
@@ -8,7 +8,7 @@ defmodule Farmbot.CeleryScript.AST do
     @moduledoc "CeleryScript Argument."
 
     @doc "Verify this arg."
-    @callback verify(any) :: :ok | {:error, term}
+    @callback verify(any) :: {:ok, any} | {:error, term}
   end
 
   defmodule Node do
@@ -43,7 +43,7 @@ defmodule Farmbot.CeleryScript.AST do
           if {arg_name, 0} in __MODULE__.module_info(:exports) do
             case apply(__MODULE__, arg_name, []).verify(val) do
               # if this argument is valid, continue enumeration.
-              :ok -> decode_args(rest, [arg | acc])
+              {:ok, decoded} -> decode_args(rest, [decoded | acc])
               {:error, _} = err -> err
             end
           else
diff --git a/lib/farmbot/celery_script/ast/node/sequence.ex b/lib/farmbot/celery_script/ast/node/sequence.ex
index 154028d4..aa46bf5d 100644
--- a/lib/farmbot/celery_script/ast/node/sequence.ex
+++ b/lib/farmbot/celery_script/ast/node/sequence.ex
@@ -1,5 +1,5 @@
 defmodule Farmbot.CeleryScript.AST.Node.Sequence do
   @moduledoc false
   use Farmbot.CeleryScript.AST.Node
-  allow_args [:version, :is_outdated]
+  allow_args [:version]
 end