diff --git a/lib/shared/reaction-utils.js b/lib/shared/reaction-utils.js
--- a/lib/shared/reaction-utils.js
+++ b/lib/shared/reaction-utils.js
@@ -17,6 +17,7 @@
   ComposableMessageInfo,
   RobotextMessageInfo,
 } from '../types/message-types.js';
+import { isComposableMessageType } from '../types/message-types.js';
 import type { ThreadInfo } from '../types/minimally-encoded-thread-permissions-types.js';
 import { threadPermissions } from '../types/thread-permission-types.js';
 import { useDispatchActionPromise } from '../utils/redux-promise-utils.js';
@@ -96,11 +97,12 @@
     return false;
   }
 
+  const protocol = threadSpecs[threadInfo.type].protocol();
   if (
     !targetMessageInfo ||
-    (!targetMessageInfo.id &&
-      !threadSpecs[threadInfo.type].protocol()
-        .canActionsTargetPendingMessages) ||
+    (!targetMessageInfo.id && !protocol.canActionsTargetPendingMessages) ||
+    (!isComposableMessageType(targetMessageInfo.type) &&
+      !protocol.canReactToRobotext) ||
     (threadInfo.sourceMessageID &&
       threadInfo.sourceMessageID === targetMessageInfo.id)
   ) {
diff --git a/lib/shared/threads/protocols/dm-thread-protocol.js b/lib/shared/threads/protocols/dm-thread-protocol.js
--- a/lib/shared/threads/protocols/dm-thread-protocol.js
+++ b/lib/shared/threads/protocols/dm-thread-protocol.js
@@ -935,6 +935,7 @@
     },
     supportsBackgroundNotifs: true,
     viewerCanUpdateOwnRole: false,
+    canReactToRobotext: true,
   });
 
 function pendingThreadType(numberOfOtherMembers: number) {
diff --git a/lib/shared/threads/protocols/farcaster-thread-protocol.js b/lib/shared/threads/protocols/farcaster-thread-protocol.js
--- a/lib/shared/threads/protocols/farcaster-thread-protocol.js
+++ b/lib/shared/threads/protocols/farcaster-thread-protocol.js
@@ -807,6 +807,7 @@
   },
   supportsBackgroundNotifs: false,
   viewerCanUpdateOwnRole: false,
+  canReactToRobotext: false,
 };
 
 function pendingThreadType(numberOfOtherMembers: number) {
diff --git a/lib/shared/threads/protocols/keyserver-thread-protocol.js b/lib/shared/threads/protocols/keyserver-thread-protocol.js
--- a/lib/shared/threads/protocols/keyserver-thread-protocol.js
+++ b/lib/shared/threads/protocols/keyserver-thread-protocol.js
@@ -738,6 +738,7 @@
     },
     supportsBackgroundNotifs: true,
     viewerCanUpdateOwnRole: true,
+    canReactToRobotext: true,
   });
 
 function pendingThreadType(numberOfOtherMembers: number) {
diff --git a/lib/shared/threads/thread-spec.js b/lib/shared/threads/thread-spec.js
--- a/lib/shared/threads/thread-spec.js
+++ b/lib/shared/threads/thread-spec.js
@@ -511,6 +511,7 @@
   },
   +supportsBackgroundNotifs: boolean,
   +viewerCanUpdateOwnRole: boolean,
+  +canReactToRobotext: boolean,
 };
 
 export type ThreadSpec<