diff --git a/types/global.d.ts b/types/global.d.ts
index be7f78d..5056018 100644
--- a/types/global.d.ts
+++ b/types/global.d.ts
@@ -14,6 +14,47 @@ export interface FriendRequestId extends MemeId {}
 // eslint-disable-next-line @typescript-eslint/no-empty-interface
 export interface UnixEpochMs extends number {}
 
+/**
+ * The shape of the options object accepted by the chats worker.
+ */
+export type ChatsWorkerOptions = {
+  debugNamespace: string;
+  user_id: string;
+  username: string;
+  startTimeMs: UnixEpochMs;
+};
+
+/**
+ * The shape of the options object accepted by the friends worker.
+ */
+export type FriendsWorkerOptions = {
+  debugNamespace: string;
+  user_id: string;
+  username: string;
+  startTimeMs: UnixEpochMs;
+};
+
+/**
+ * The shape of the options object accepted by the interactions worker.
+ */
+export type InteractionsWorkerOptions = {
+  debugNamespace: string;
+  user_id: string;
+  username: string;
+  friend_ids: string[];
+  startTimeMs: UnixEpochMs;
+};
+
+/**
+ * The shape of the options object accepted by the memes worker.
+ */
+export type MemesWorkerOptions = {
+  debugNamespace: string;
+  user_id: string;
+  username: string;
+  startTimeMs: UnixEpochMs;
+};
+
 /**
  * The shape of an imgur image upload response.
  * @see https://apidocs.imgur.com