diff --git a/desk/app/activity.hoon b/desk/app/activity.hoon
index e0a4d7a9bd..17a299333b 100644
--- a/desk/app/activity.hoon
+++ b/desk/app/activity.hoon
@@ -6,15 +6,16 @@
   |%
   +$  card  card:agent:gall
   ::
-  +$  versioned-state
-    $%  state-1
+  +$  current-state
+    $:  %2
+        allowed=notifications-allowed:a
+        =indices:a
+        =activity:a
+        =volume-settings:a
     ==
-  ::
-  +$  state-1
-    [%1 =indices:a =activity:a =volume-settings:a]
   --
 ::
-=|  state-1
+=|  current-state
 =*  state  -
 ::
 ::NOTE  setting this to true causes some parts of state & update management to
@@ -90,12 +91,22 @@
 ::
 ++  load
   |=  =vase
-  ^+  cor
+  |^  ^+  cor
   ?:  ?=([%0 *] q.vase)  init
   =+  !<(old=versioned-state vase)
-  ?>  ?=(%1 -.old)
+  =?  old  ?=(%1 -.old)  (state-1-to-2 old)
+  ?>  ?=(%2 -.old)
   =.  state  old
   cor
+  +$  versioned-state  $%(state-2 state-1)
+  +$  state-2  current-state
+  +$  state-1
+    [%1 =indices:a =activity:a =volume-settings:a]
+  ++  state-1-to-2
+    |=  old=state-1
+    ^-  state-2
+    [%2 %all +.old]
+  --
 ::
 ++  scry-path
   |=  [=dude:gall =path]
@@ -274,7 +285,8 @@
       %noun
     ?+  q.vase  ~|(bad-poke+mark !!)
         %migrate
-      =.  state  *state-1
+      =.  state  *current-state
+      =.  allowed  %all
       migrate
     ==
   ::
@@ -285,6 +297,7 @@
       %del      (del +.action)
       %read     (read +.action)
       %adjust   (adjust +.action)
+      %allow-notifications  (allow +.action)
     ==
   ==
 ::
@@ -397,6 +410,9 @@
   ::
       [%x %volume-settings ~]
     ``activity-settings+!>(volume-settings)
+  ::
+      [%x %notifications-allowed ~]
+    ``activity-allowed+!>(`notifications-allowed:a`allowed)
   ==
 ::
 ++  feed
@@ -512,7 +528,7 @@
   =/  =source:a  (determine-source inc)
   =?  cor  !importing
     (give %fact ~[/] activity-update+!>([%add source time-id event]))
-  =?  cor  &(!importing notify)
+  =?  cor  &(!importing notify (is-allowed inc))
     (give %fact ~[/notifications] activity-event+!>([time-id event]))
   =.  indices
     =/  =stream:a  (put:on-event:a stream:base time-id event)
@@ -541,6 +557,21 @@
     (add-to-index group-src time-id event(child &))
   ==
 ::
+++  is-allowed
+  |=  =incoming-event:a
+  ?:  ?=(%all allowed)  &
+  ?:  ?=(%none allowed)  |
+  =/  type  (determine-event-type incoming-event)
+  ?+  type  |
+    %reply  &
+    %dm-invite  &
+    %dm-post    &
+    %dm-reply   &
+    %post-mention  &
+    %reply-mention  &
+    %dm-post-mention  &
+    %dm-reply-mention  &
+  ==
 ++  del
   |=  =source:a
   ^+  cor
@@ -730,6 +761,11 @@
   ::  recalculate activity summary with new settings
   (refresh source)
 ::
+++  allow
+  |=  na=notifications-allowed:a
+  ^+  cor
+  =.  allowed  na
+  (give %fact ~[/] activity-update+!>([%allow-notifications na]))
 ++  get-children
   |=  =source:a
   ^-  (list source:a)
diff --git a/desk/lib/activity-json.hoon b/desk/lib/activity-json.hoon
index c642a3f135..ff7fe73198 100644
--- a/desk/lib/activity-json.hoon
+++ b/desk/lib/activity-json.hoon
@@ -237,6 +237,8 @@
     :~  time+s+(scot %ud time.te)
         event+(event event.te)
     ==
+  ::
+  ++  allowed  (lead %s)
   +|  %collections
   ::
   ++  stream
@@ -297,6 +299,7 @@
       %del  (source +.u)
       %read  (read +.u)
       %adjust  (adjusted +.u)
+      %allow-notifications  (allowed +.u)
     ==
   ::
   ++  added
@@ -374,6 +377,7 @@
         del/source
         read/read
         adjust/adjust
+        allow-notifications/(su (perk %all %some %none ~))
     ==
   ::
   ++  add
diff --git a/desk/lib/mark-warmer.hoon b/desk/lib/mark-warmer.hoon
index c346a93806..870f65beae 100644
--- a/desk/lib/mark-warmer.hoon
+++ b/desk/lib/mark-warmer.hoon
@@ -35,6 +35,7 @@
 /$  act-sum     %activity-summary     %json
 /$  act-vol     %activity-settings    %json
 /$  act-evt     %activity-event       %json
+/$  act-allow   %activity-allowed     %json
 /$  act-stream  %activity-stream      %json
 /$  act-feed    %activity-feed        %json
 /$  act-fe-it   %activity-feed-init   %json
diff --git a/desk/mar/activity/allowed.hoon b/desk/mar/activity/allowed.hoon
new file mode 100644
index 0000000000..8baa02bd81
--- /dev/null
+++ b/desk/mar/activity/allowed.hoon
@@ -0,0 +1,14 @@
+/-  a=activity
+/+  aj=activity-json
+|_  na=notifications-allowed:a
+++  grad  %noun
+++  grow
+  |%
+  ++  noun  na
+  ++  json  (allowed:enjs:aj na)
+  --
+++  grab
+  |%
+  ++  noun  notifications-allowed:a
+  --
+--
diff --git a/desk/sur/activity.hoon b/desk/sur/activity.hoon
index 9c8d03cf04..f7d987a297 100644
--- a/desk/sur/activity.hoon
+++ b/desk/sur/activity.hoon
@@ -27,12 +27,14 @@
 ::    $del: remove a source and all its activity
 ::    $read: mark an event as read
 ::    $adjust: adjust the volume of an source
+::    $allow-notifications: change which notifications are allowed
 ::
 +$  action
   $%  [%add =incoming-event]
       [%del =source]
       [%read =source =read-action]
       [%adjust =source =(unit volume-map)]
+      [%allow-notifications allow=notifications-allowed]
   ==
 ::
 ::  $read-action: mark activity read
@@ -55,12 +57,14 @@
 ::    $del: a source and its activity were removed
 ::    $read: a source's activity state was updated
 ::    $adjust: the volume of a source was adjusted
+::    $allow-notifications: the allowed notifications were changed
 ::
 +$  update
   $%  [%add =source time-event]
       [%del =source]
       [%read =source =activity-summary]
       [%adjust =source volume-map=(unit volume-map)]
+      [%allow-notifications allow=notifications-allowed]
   ==
 ::
 +|  %basics
@@ -165,6 +169,7 @@
   ==
 +$  unread-point  [message-key count=@ud notify=_|]
 +$  volume  [unreads=? notify=?]
++$  notifications-allowed  ?(%all %some %none)
 +$  activity-bundle
   $:  =source
       latest=time