diff --git a/doc/examples/pingpongclock.ivy b/doc/examples/pingpongclock.ivy
index 64a0868..f8be129 100644
--- a/doc/examples/pingpongclock.ivy
+++ b/doc/examples/pingpongclock.ivy
@@ -1,22 +1,22 @@
-#lang ivy1.6
+#lang ivy1.7
 
-object clock = {
-    type t
-    relation (X:t < Y:t)
+isolate clock = {
 
-    property [transitivity] X:t < Y & Y < Z -> X < Z
-    property [antisymmetry] ~(X:t < Y & Y < X)
-
-    action incr(inp:t) returns (out:t)
+    type this
+    relation (X:clock < Y:clock)
+    action incr(inp:clock) returns (out:clock)
 
     object spec = {
+        property [transitivity] X:clock < Y & Y < Z -> X < Z
+        property [antisymmetry] ~(X:clock < Y & Y < X)
+
 	after incr {
 	    assert inp < out
 	}
     }
 
     object impl = {
-        interpret clock.t -> int
+        interpret clock -> int
 
         implement incr {
 	    out := inp + 1
@@ -24,36 +24,45 @@ object clock = {
     }
 }
 
-object intf = {
-    action ping(x:clock.t)
-    action pong(x:clock.t)
-}
+isolate intf = {
 
-type side_t = {left,right}
+    action ping(x:clock)
+    action pong(x:clock)
 
-object spec = {
-    individual side : side_t
-    individual time : clock.t
-    init side = left & time = 0
+    object spec = {
 
-    before intf.ping {
-	assert side = left & time < x;
-	side := right;
-	time := x
-    }
+        type side_t = {left,right}
+        individual side : side_t
+        individual time : clock
 
-    before intf.pong {
-	assert side = right & time < x;
-	side := left;
-	time := x
+        after init {
+            side := left;
+            time := 0
+        }
+
+        before ping {
+            assert side = left & time < x;
+            side := right;
+            time := x
+        }
+
+        before pong {
+            assert side = right & time < x;
+            side := left;
+            time := x
+        }
     }
 }
 
 
-object left_player = {
+isolate left_player = {
+
     individual ball : bool
-    individual time : clock.t
-    init ball & time = 0
+    individual time : clock
+    after init {
+        ball := true;
+        time := 0
+    }
 
     action hit = {
 	if ball {
@@ -67,13 +76,18 @@ object left_player = {
 	time := x
     }
 
-    conjecture ball -> (spec.side = left & spec.time <= time)
+    conjecture ball -> (intf.spec.side = intf.spec.left & intf.spec.time <= time)
 }
+with intf, clock
+
+
+isolate right_player = {
 
-object right_player = {
     individual ball : bool
-    individual time : clock.t
-    init ~ball
+    individual time : clock
+    after init {
+        ball := false
+    }
 
     action hit = {
 	if ball {
@@ -87,14 +101,10 @@ object right_player = {
 	time := x
     }
 
-    conjecture ball -> (spec.side = right & spec.time <= time)
+    conjecture ball -> (intf.spec.side = intf.spec.right & intf.spec.time <= time)
 }
-
-
+with intf, clock
 
 export left_player.hit
 export right_player.hit
 
-isolate iso_l = left_player with spec, clock
-isolate iso_r = right_player with spec, clock
-isolate iso_ci = clock
diff --git a/ivy/ivy_check.py b/ivy/ivy_check.py
index a4ce739..7447965 100644
--- a/ivy/ivy_check.py
+++ b/ivy/ivy_check.py
@@ -257,11 +257,20 @@ def summarize_isolate(mod):
         for lf in mod.labeled_conjs:
             print pretty_lf(lf)
 
+    if mod.isolate_info.implementations:
+        print "\n    The following action implementations are present:"
+        for mixer,mixee,action in sorted(mod.isolate_info.implementations,key=lambda x: x[0]):
+            print "        {}implementation of {}".format(pretty_lineno(action),mixee)
 
-    if mod.actions:
-        print "\n    The following actions are present:"
-        for actname,action in sorted(mod.actions.iteritems()):
-            print "        {}{}".format(pretty_lineno(action),actname)
+    if mod.isolate_info.monitors:
+        print "\n    The following action monitors are present:"
+        for mixer,mixee,action in sorted(mod.isolate_info.monitors,key=lambda x: x[0]):
+            print "        {}monitor of {}".format(pretty_lineno(action),mixee)
+
+    # if mod.actions:
+    #     print "\n    The following actions are present:"
+    #     for actname,action in sorted(mod.actions.iteritems()):
+    #         print "        {}{}".format(pretty_lineno(action),actname)
 
     if mod.initializers:
         print "\n    The following initializers are present:"
diff --git a/ivy/ivy_isolate.py b/ivy/ivy_isolate.py
index 7188a4b..9c1ce73 100644
--- a/ivy/ivy_isolate.py
+++ b/ivy/ivy_isolate.py
@@ -739,6 +739,8 @@ def isolate_component(mod,isolate_name,extra_with=[],extra_strip=None,after_init
     delegates = set(s.delegated() for s in mod.delegates if not s.delegee())
     delegated_to = dict((s.delegated(),s.delegee()) for s in mod.delegates if s.delegee())
     
+    mod.isolate_info = im.IsolateInfo()
+
     impl_mixins = defaultdict(list)
     # delegate all the stub actions to their implementations
     for actname,ms in mod.mixins.iteritems():
@@ -757,6 +759,7 @@ def isolate_component(mod,isolate_name,extra_with=[],extra_strip=None,after_init
                     raise iu.IvyError(m,'multiple implementations of action {}'.format(m.mixee()))
                 action = ia.apply_mixin(m,mod.actions[m.mixer()],action)
                 mod.actions[m.mixee()] = action
+                mod.isolate_info.implementations.append((m.mixer(),m.mixee(),action))
             implementation_map[m.mixee()] = m.mixer()
 
     new_actions = {}
@@ -795,6 +798,10 @@ def isolate_component(mod,isolate_name,extra_with=[],extra_strip=None,after_init
             new_actions['ext:'+actname] = new_action
             # TODO: external version is public if action public *or* called from opaque
             # public_actions.add('ext:'+actname)
+
+            # record info on usage of implementations and monitors for user
+            if actname not in implementation_map:
+                mod.isolate_info.implementations.append((actname,actname,action))
         else:
             # TODO: here must check that summarized action does not
             # have a call dependency on the isolated module
@@ -803,6 +810,12 @@ def isolate_component(mod,isolate_name,extra_with=[],extra_strip=None,after_init
             new_actions[actname] = add_mixins(mod,actname,action,after_mixins,use_mixin,ext_mod_mixin(after_mixins))
             new_actions['ext:'+actname] = add_mixins(mod,actname,action,ext_assumes_no_ver,use_mixin,ext_mod_mixin(all_mixins))
 
+        for mixin in mod.mixins[actname]:
+            if use_mixin(mixin.mixer()):
+                mod.isolate_info.monitors.append((mixin.mixer(),mixin.mixee(),mod.actions[mixin.mixer()]))
+            
+
+
     # figure out what is exported:
     exported = set()
     export_preconds = defaultdict(list)
@@ -927,6 +940,10 @@ def isolate_component(mod,isolate_name,extra_with=[],extra_strip=None,after_init
 
     cone = get_mod_cone(mod,actions=new_actions,roots=exported,after_inits=after_inits)        
     new_actions = dict((x,y) for x,y in new_actions.iteritems() if x in cone)
+    mod.isolate_info.implementations = [(impl,actname,action) for impl,actname,action in mod.isolate_info.implementations
+                                       if actname in new_actions or 'ext:'+actname in new_actions]
+    mod.isolate_info.monitors = [(mixer,mixee,action) for mixer,mixee,action in mod.isolate_info.monitors
+                                if mixee in new_actions or 'ext:'+mixee in new_actions]
 
     # Now that we have the accessible axioms, propteries inits, conjectures and actions,
     # action, we can find the accessible definitions. 
@@ -1324,6 +1341,8 @@ def create_isolate(iso,mod = None,**kwargs):
             if mod.isolates and cone_of_influence.get():
                 raise iu.IvyError(None,'no isolate specified on command line')
             # apply all the mixins in no particular order
+            mod.isolate_info = im.IsolateInfo()
+            implemented = set()
             for name,mixins in mod.mixins.iteritems():
                 for mixin in mixins:
                     action1,action2 = (lookup_action(mixin,mod,a.relname) for a in mixin.args)
@@ -1332,6 +1351,16 @@ def create_isolate(iso,mod = None,**kwargs):
                         action1 = action1.assert_to_assume()
                     mixed = ia.apply_mixin(mixin,action1,action2)
                     mod.actions[mixed_name] = mixed
+                    triple = (mixin.mixer(),mixin.mixee(),mod.actions[mixin.mixer()])
+                    if isinstance(mixin,ivy_ast.MixinImplementDef):
+                        mod.isolate_info.implementations.append(triple)
+                        implemented.add(mixin.mixee())
+                    else:
+                        mod.isolate_info.monitors.append(triple)
+                    implemented.add(mixin.mixer())
+            for actname,action in mod.actions.iteritems():
+                if actname not in implemented:
+                    mod.isolate_info.implementations.append((actname,actname,action))
             # find the globally exported actions (all if none specified, for compat)
             if mod.exports:
                 mod.public_actions.clear()
diff --git a/ivy/ivy_module.py b/ivy/ivy_module.py
index 85e1c26..03acd7d 100644
--- a/ivy/ivy_module.py
+++ b/ivy/ivy_module.py
@@ -74,6 +74,7 @@ class Module(object):
         self.proofs = [] # list of pair (labeled formula, proof)
         self.named = [] # list of pair (labeled formula, atom)
         self.subgoals = [] # (labeled formula * labeled formula list) list
+        self.isolate_info = None # IsolateInfo or None
         
         self.sig = il.sig.copy() # capture the current signature
 
@@ -335,3 +336,11 @@ def sort_dependencies(mod,sortname):
             return [s.rep for s in t.args[1:] if s.rep in mod.sig.sorts]
     return []
 
+# Holds info about isolate for user consumption
+#
+# -- implementations is a list of pairs (mixer,mixee,action) for present action implementaitons
+# -- monitors is a list of triples (mixer,mixee,action) for present monitors
+
+class IsolateInfo(object):
+    def __init__(self):
+        self.implementations,self.monitors = [],[]