diff --git a/packages/shared/src/features/conversation/schema.ts b/packages/shared/src/features/conversation/schema.ts
index 57c97e3..ddf4686 100644
--- a/packages/shared/src/features/conversation/schema.ts
+++ b/packages/shared/src/features/conversation/schema.ts
@@ -4,6 +4,7 @@ export const conversation = z.object({
   user_id: z.number(),
   calls: z.array(z.uuidv4()).optional(),
   last_message_at: z.number(),
+  username: z.string().optional(), // Todo: Remove this
 });
 
 export const community = z.object({
diff --git a/packages/ttp/src/core.ts b/packages/ttp/src/core.ts
index 6844c20..32062d8 100644
--- a/packages/ttp/src/core.ts
+++ b/packages/ttp/src/core.ts
@@ -276,6 +276,7 @@ const DATA_TYPES = [
   "calls",
   "timeout",
   "has_admin",
+  "last_message_at",
 ] as const;
 
 const COMMUNICATION_TYPE_BY_NAME = createIndexMap(COMMUNICATION_TYPES);
@@ -303,6 +304,7 @@ registerDataKinds("number", [
   "send_time",
   "sub_level",
   "sub_end",
+  "last_message_at",
 ]);
 
 registerDataKinds("string", [
diff --git a/todo.md b/todo.md
index bba9d6e..5bdf43c 100644
--- a/todo.md
+++ b/todo.md
@@ -1,3 +1,2 @@
 - Calculate message height and pass to virtualizer (-> packages/chat/src/components/input.tsx)
-- Review legal screen stuff
-- Fix that location change doesn't trigger loggedIn so the user is stuck on a connecting page
+- Split ttp codec into separate file