diff --git a/lib/shared/messages/reaction-message-spec.js b/lib/shared/messages/reaction-message-spec.js
--- a/lib/shared/messages/reaction-message-spec.js
+++ b/lib/shared/messages/reaction-message-spec.js
@@ -6,16 +6,26 @@
 import {
   assertMessageType,
   messageTypes,
+  type MessageInfo,
   type ClientDBMessageInfo,
   type ReactionMessageData,
   type RawReactionMessageInfo,
   type ReactionMessageInfo,
 } from '../../types/message-types';
 import type { RawUnsupportedMessageInfo } from '../../types/messages/unsupported';
+import type { NotifTexts } from '../../types/notif-types';
+import type { ThreadInfo } from '../../types/thread-types';
 import type { RelativeUserInfo } from '../../types/user-types';
 import { messagePreviewText, removeCreatorAsViewer } from '../message-utils';
+import { threadIsGroupChat } from '../thread-utils';
+import { stringForUser } from '../user-utils';
 import { hasMinCodeVersion } from '../version-utils';
-import type { MessageSpec, MessageTitleParam } from './message-spec';
+import type {
+  MessageSpec,
+  MessageTitleParam,
+  NotificationTextsParams,
+} from './message-spec';
+import { assertSingleMessageInfo } from './utils';
 
 export const reactionMessageSpec: MessageSpec<
   ReactionMessageData,
@@ -150,5 +160,38 @@
     return unwrapped;
   },
 
-  generatesNotifs: false,
+  notificationTexts(
+    messageInfos: $ReadOnlyArray<MessageInfo>,
+    threadInfo: ThreadInfo,
+    params: NotificationTextsParams,
+  ): NotifTexts {
+    const messageInfo = assertSingleMessageInfo(messageInfos);
+    invariant(
+      messageInfo.type === messageTypes.REACTION,
+      'messageInfo should be reaction type',
+    );
+
+    const userString = stringForUser(messageInfo.creator);
+    const body =
+      messageInfo.action === 'add_reaction'
+        ? 'liked a message'
+        : 'unliked a message';
+
+    let merged;
+    if (!threadInfo.name && !threadIsGroupChat(threadInfo)) {
+      merged = `${userString} ${body}`;
+    } else {
+      const threadName = params.notifThreadName(threadInfo);
+      merged = `${userString} ${body} in ${threadName}`;
+    }
+
+    return {
+      merged,
+      body,
+      title: threadInfo.uiName,
+      prefix: userString,
+    };
+  },
+
+  generatesNotifs: true,
 });