diff --git a/client/index.js b/client/index.js
index 1ee0189..0135e83 100644
--- a/client/index.js
+++ b/client/index.js
@@ -1,5 +1,5 @@
 // 2nd party.
-import {create as createClient} from '@avocado/client';
+import {create as createClient} from '@avocado/client/socket';
 import {EntityList} from '@avocado/entity';
 import {ActionRegistry} from '@avocado/input';
 import {Stage} from '@avocado/graphics';
@@ -216,8 +216,15 @@ const predictionHandle = setInterval(() => {
 
 // State updates.
 function onMessage(message) {
-  if ('s' in message) {
-    const patch = unpacker.unpack(message.s);
+  if ('type' in message) {
+    switch (message.type) {
+      case 'keys':
+        unpacker.registerKeys(message.payload);
+        break;
+    }
+  }
+  if (message instanceof window.ArrayBuffer) {
+    const patch = unpacker.unpack(message);
     for (const step of patch) {
       const {op, path, value} = step;
       if ('add' === op && '/selfEntity' === path) {
@@ -226,7 +233,6 @@ function onMessage(message) {
     }
     synchronizer.patchState(patch);
     dirty = true;
-    return;
   }
 }
 socket.on('message', onMessage);
diff --git a/traits/informed.js b/traits/informed.js
index 507ae29..12a7cdd 100644
--- a/traits/informed.js
+++ b/traits/informed.js
@@ -69,8 +69,15 @@ export class Informed extends decorate(Trait) {
           return;
         }
         // Emit!
+        const keys = this._packer.computeNewKeys(steps);
+        if (0 !== keys[0].length) {
+          this._socket.send({
+            type: 'keys',
+            payload: keys,
+          });
+        }
         const packed = this._packer.pack(steps);
-        this._socket.send({s: packed});
+        this._socket.send(packed);
       },
 
     };