diff --git a/pkg/garden/app/hark-system-hook.hoon b/pkg/garden/app/hark-system-hook.hoon
index de801d2c8e..6510210546 100644
--- a/pkg/garden/app/hark-system-hook.hoon
+++ b/pkg/garden/app/hark-system-hook.hoon
@@ -2,32 +2,34 @@
 /+  verb, dbug, default-agent, agentio
 |%
 +$  card  card:agent:gall
++$  state-0  [%0 lagging=_|]
 ::
-::
+++  lag-interval  ~m10
 --
-=<  
 %+  verb  &
 %-  agent:dbug
 ^-  agent:gall
+=|  state-0
+=*  state  -
+=<  
 |_  =bowl:gall
 +*   this  .
      def  ~(. (default-agent this %|) bowl)
      io   ~(. agentio bowl)
      pass  pass:io
      cc   ~(. +> bowl)
-++  on-init  on-init:def 
-::
+++  on-init
+  ^-  (quip card _this)
+  :_  this
+  [onboard watch:kiln check:lag ~]:cc
 ::
 ++  on-load
   |=  =vase
-  :_  this :: TODO: move to on-init
-  :-  onboard:cc
-  (drop safe-watch:kiln:cc)
-++  on-save  !>(~)
+  =+  !<(old=state-0 vase)
+  `this(state old)
 ::
-++  on-poke
-  |=  [=mark =vase]
-  !!
+++  on-save  !>(state)
+++  on-poke  on-poke:def
 ++  on-peek  on-peek:def
 ++  on-watch  on-watch:def
 ++  on-agent
@@ -59,13 +61,24 @@
     ==
   --
 ::
-++  on-arvo  on-arvo:def
+++  on-arvo  
+  |=  [=wire sign=sign-arvo]
+  ^-  (quip card _this)
+  ?.  ?=([%check-lag ~] wire)  (on-arvo:def wire sign)
+  ?>  ?=([%behn %wake *] sign)
+  =+  .^(lag=? %$ (scry:io %$ /zen/lag))
+  ?:  =(lagging lag)  :_(this ~[check:lag:cc])
+  :_  this(lagging lag)
+  :_  ~[check:lag:cc]
+  ?:(lagging start:lag:cc stop:lag:cc)
+::
 ++  on-fail  on-fail:def
 ++  on-leave  on-leave:def
 --
 |_  =bowl:gall
 +*  io   ~(. agentio bowl)
     pass  pass:io
+::
 ++  onboard
   ^-  card
   %-  poke:ha
@@ -73,7 +86,15 @@
   ::  We special case this in the grid UI, but should include something
   ::  for third parties
   [~[text+'Welcome to urbit'] ~ now.bowl / /]
-
+::
+++  lag
+  |%  
+  ++  check  (~(wait pass /check-lag) (add now.bowl lag-interval))
+  ++  place  [q.byk.bowl /lag]
+  ++  body   `body:hark`[~[text/'Runtime lagging'] ~ now.bowl / /]
+  ++  start  (poke:ha %add-note [/ place] body)
+  ++  stop   (poke:ha %del-place place)
+  --
 ++  ha
   |%
   ++  pass  ~(. ^pass /hark)
diff --git a/pkg/garden/lib/hark/store.hoon b/pkg/garden/lib/hark/store.hoon
index 3bb92c9091..492ecb9892 100644
--- a/pkg/garden/lib/hark/store.hoon
+++ b/pkg/garden/lib/hark/store.hoon
@@ -24,9 +24,16 @@
         %all-stats     (all-stats +.upd)
         ::%read-note   (index +.upd)
         ::%note-read   (note-read +.upd)
-        :: %archive (notif-ref +.upd)
+        %archive       (archive +.upd)
     ==
     ::
+    ++  archive
+      |=  [t=(unit @da) b=^bin]
+      %-  pairs
+      :~  time+?~(t ~ s+(scot %ud u.t))
+          bin+(bin b)
+      ==
+    ::
     ++  note-read
       |=  *
       (pairs ~)