diff --git a/scripts/extensions/command.lua b/scripts/extensions/command.lua
index 65b043dc7..739cc7d2f 100644
--- a/scripts/extensions/command.lua
+++ b/scripts/extensions/command.lua
@@ -21,13 +21,6 @@ function usage ()
   return 'task random'
 end
 
--- Arguments: None
--- Returns:   Valid Taskwarrior BNF, minimally defining a production rule that
---            has the same name as the command itself
-function syntax ()
-  return 'random ::= "random" ;'
-end
-
 -- Arguments: None
 -- Returns:   1 --> command does not modify data
 --            0 --> command modifies data
diff --git a/scripts/extensions/dom.lua b/scripts/extensions/dom.lua
index d980dfc23..d9346c3af 100644
--- a/scripts/extensions/dom.lua
+++ b/scripts/extensions/dom.lua
@@ -18,6 +18,9 @@ end
 -- Arguments: The DOM reference to evaluate
 -- Returns:   The value from the DOM lookup
 function lookup (name)
-  return 1.23 -- Fake load average
+  if name == 'system.load.average'
+  then
+    return 1.23 -- Fake load average
+  end
 end
 
diff --git a/scripts/extensions/program_hook.lua b/scripts/extensions/program_hook.lua
index a34024e8a..61d74ecd2 100644
--- a/scripts/extensions/program_hook.lua
+++ b/scripts/extensions/program_hook.lua
@@ -23,7 +23,7 @@ end
 
 -- Arguments: None
 -- Returns:   0 --> success only
-function goodbye ()
+function execute ()
   print ('Goodbye.')
 end
 
diff --git a/scripts/extensions/task_hook.lua b/scripts/extensions/task_hook.lua
index 1e29a7df8..df98d15ed 100644
--- a/scripts/extensions/task_hook.lua
+++ b/scripts/extensions/task_hook.lua
@@ -24,7 +24,7 @@ end
 -- Arguments: None
 -- Returns:   1 --> failure
 --            0 --> success
-function encourage ()
+function execute (uuid)
   -- Only provide encouragement if the verbosity settings allow it.
   verbosity = task_get ('rc.verbose')
   if string.find (verbosity, 'encourage') ~= nil
diff --git a/scripts/extensions/uda.lua b/scripts/extensions/uda.lua
index 2aec17a45..081ea6c8f 100644
--- a/scripts/extensions/uda.lua
+++ b/scripts/extensions/uda.lua
@@ -45,7 +45,8 @@ end
 -- Arguments: Raw data
 -- Returns:   Formatted data
 -- Note:      Shown here is a pass-through format, doing no formatting.  This is
---            the default behavior if the format function is not implemented.
+--            also the default behavior if the format function is not
+--            implemented.
 function format (value)
   return value
 end
@@ -53,8 +54,8 @@ end
 -- Arguments: Value
 -- Returns:   Urgency Term
 -- Note:      Should reference rc.urgency.<field>.coefficient
-function urgency (value)
-  coefficient = task_get ('urgency.priority.coefficient')
+function urgency (uuid)
+  coefficient = task_get ('rc.urgency.priority.coefficient')
 
   -- TODO Urgency calculation here