hark-graph-hook: notifications for group feed

pkg/arvo/app/hark-graph-hook.hoon

@@ -459,7 +459,6 @@
             =notif-kind:hook
         ==
     ^+  update-core 
-    ?:  ?=(%none mode.notif-kind)  update-core
     =/  =stats-index:store
       (to-stats-index:store index)
     =.  update-core

pkg/arvo/mar/graph/validator/link.hoon

@@ -28,7 +28,6 @@
     ?+  index.p.i  ~
       [@ ~]       `[%link [0 1] %each %children]
       [@ @ %1 ~]  `[%comment [1 2] %count %siblings]
-      [@ @ @ ~]   `[%edit-comment [1 2] %none %none]
     ==
   ::
   ++  transform-add-nodes

pkg/arvo/mar/graph/validator/post.hoon

@@ -14,8 +14,11 @@
     [%yes %self %self]
   ::  +notification-kind: no notifications for now
   ::
-  ++  notification-kind  ~
-  ++  transform-add-nodes
+  ++  notification-kind  
+    =/  len  (lent index.p.i)
+    `[%post [(dec len) len] %none %children]
+  ::
+    ++  transform-add-nodes
     |=  [=index =post =atom was-parent-modified=?]
     ^-  [^index ^post]
     =-  [- post(index -)]

pkg/arvo/mar/graph/validator/publish.hoon

@@ -26,9 +26,7 @@
   ++  notification-kind
     ?+  index.p.i   ~
       [@ %1 %1 ~]    `[%note [0 1] %each %children]
-      [@ %1 @ ~]     `[%edit-note [0 1] %none %none]
       [@ %2 @ %1 ~]  `[%comment [1 3] %count %siblings]
-      [@ %2 @ @ ~]   `[%edit-comment [1 3] %none %none]
     ==
   ::
   ++  transform-add-nodes