3 files changed, 24 insertions, 12 deletions
diff --git a/alv/module.moon b/alv/module.moon
index 6eeb10b..d3fa5e5 100644
--- a/alv/module.moon
+++ b/alv/module.moon
@@ -14,7 +14,7 @@ class Module
   --- create a new Module.
   -- @classmethod
   new: =>
-    @registry = Registry!
+    @registry = Registry @
 
   --- check when the module source has last changed.
   -- @function poll
diff --git a/alv/registry.moon b/alv/registry.moon
index b625c1f..77aae7d 100644
--- a/alv/registry.moon
+++ b/alv/registry.moon
@@ -100,12 +100,16 @@ class Registry
 
     @last_map = {}
 
+  --- the module associated with this Registry
+  -- @tfield Module module
+
 --- static functions
 -- @section static
 
   --- create a new Registry.
   -- @classmethod
-  new: =>
+  -- @tparam Module module
+  new: (@module) =>
     @last_map = {}
 
 {
diff --git a/alv/tag.moon b/alv/tag.moon
index 1ad9b28..070b0cd 100644
--- a/alv/tag.moon
+++ b/alv/tag.moon
@@ -37,6 +37,13 @@ class Tag
     assert parent, "need parent to clone!"
     ClonedTag @, parent
 
+  --- get a globally-unique identifier for this tag
+  --
+  -- prepends the module name to the tag string
+  --
+  -- @treturn string a unique string
+  ident: => "#{@registry.module\name!}:#{@}"
+
   stringify: (depth=-1) => if @value and depth == -1 then "[#{@value}]" else ''
   __tostring: => if @value then "#{@value}" else '?'
 
@@ -45,8 +52,8 @@ class Tag
 
   new: (@value) =>
     if COPILOT and "string" != type @value
-      registry = COPILOT.active_module.registry
-      @pending = registry\register @
+      @registry = COPILOT.active_module.registry
+      @pending = @registry\register @
 
   --- get a unique index value for this Tag.
   --
@@ -66,6 +73,12 @@ class Tag
     assert either_or, "unexpected :set #{value} on #{@}"
     @value = value
 
+  --- the Registry associated with this Tag
+  -- @tfield Registry registry
+
+  --- whether this Tag is newly assigned this tick
+  -- @tfield bool pending
+
 --- static functions
 -- @section static
 
@@ -80,8 +93,8 @@ class ClonedTag extends Tag
     if 'string' == type @original.value
       return
 
-    registry = COPILOT.active_module.registry
-    registry\register @
+    @registry = COPILOT.active_module.registry
+    @registry\register @
 
     @pending = @original.pending or @parent.pending
 
@@ -96,12 +109,7 @@ class ClonedTag extends Tag
     @original\set value
 
   stringify: => error "cant stringify ClonedTag"
-
-  __tostring: =>
-    if @parent
-      "#{@parent}.#{@original}"
-    else
-      tostring @original
+  __tostring: => "#{@parent}.#{@original}"
 
 {
   :Tag