diff --git a/keyserver/src/creators/thread-creator.js b/keyserver/src/creators/thread-creator.js
--- a/keyserver/src/creators/thread-creator.js
+++ b/keyserver/src/creators/thread-creator.js
@@ -19,7 +19,7 @@
   threadTypeIsCommunityRoot,
 } from 'lib/types/thread-types-enum.js';
 import {
-  type ServerNewThreadRequest,
+  type ServerNewThinThreadRequest,
   type NewThreadResponse,
 } from 'lib/types/thread-types.js';
 import type { ServerUpdateInfo } from 'lib/types/update-types.js';
@@ -78,7 +78,7 @@
 // nonnegative role for the parent thread.
 async function createThread(
   viewer: Viewer,
-  request: ServerNewThreadRequest,
+  request: ServerNewThinThreadRequest,
   options?: CreateThreadOptions,
 ): Promise<NewThreadResponse> {
   if (!viewer.loggedIn) {
diff --git a/keyserver/src/responders/thread-responders.js b/keyserver/src/responders/thread-responders.js
--- a/keyserver/src/responders/thread-responders.js
+++ b/keyserver/src/responders/thread-responders.js
@@ -13,7 +13,7 @@
   type LeaveThreadRequest,
   type LeaveThreadResult,
   type UpdateThreadRequest,
-  type ServerNewThreadRequest,
+  type ServerNewThinThreadRequest,
   type NewThreadResponse,
   type ServerThreadJoinRequest,
   type ThreadJoinResult,
@@ -144,29 +144,30 @@
   initialMemberIDs: t.maybe(t.list(tUserID)),
   calendarQuery: t.maybe(entryQueryInputValidator),
 };
-const newThreadRequestInputValidator: TUnion<ServerNewThreadRequest> = t.union([
-  tShape({
-    type: tNumEnum([threadTypes.SIDEBAR]),
-    sourceMessageID: tID,
-    ...threadRequestValidationShape,
-  }),
-  tShape({
-    type: tNumEnum([
-      threadTypes.COMMUNITY_OPEN_SUBTHREAD,
-      threadTypes.COMMUNITY_SECRET_SUBTHREAD,
-      threadTypes.GENESIS_PERSONAL,
-      threadTypes.COMMUNITY_ROOT,
-      threadTypes.COMMUNITY_ANNOUNCEMENT_ROOT,
-      threadTypes.COMMUNITY_OPEN_ANNOUNCEMENT_SUBTHREAD,
-      threadTypes.COMMUNITY_SECRET_ANNOUNCEMENT_SUBTHREAD,
-    ]),
-    ...threadRequestValidationShape,
-  }),
-]);
+const newThreadRequestInputValidator: TUnion<ServerNewThinThreadRequest> =
+  t.union([
+    tShape({
+      type: tNumEnum([threadTypes.SIDEBAR]),
+      sourceMessageID: tID,
+      ...threadRequestValidationShape,
+    }),
+    tShape({
+      type: tNumEnum([
+        threadTypes.COMMUNITY_OPEN_SUBTHREAD,
+        threadTypes.COMMUNITY_SECRET_SUBTHREAD,
+        threadTypes.GENESIS_PERSONAL,
+        threadTypes.COMMUNITY_ROOT,
+        threadTypes.COMMUNITY_ANNOUNCEMENT_ROOT,
+        threadTypes.COMMUNITY_OPEN_ANNOUNCEMENT_SUBTHREAD,
+        threadTypes.COMMUNITY_SECRET_ANNOUNCEMENT_SUBTHREAD,
+      ]),
+      ...threadRequestValidationShape,
+    }),
+  ]);
 
 async function threadCreationResponder(
   viewer: Viewer,
-  request: ServerNewThreadRequest,
+  request: ServerNewThinThreadRequest,
 ): Promise<NewThreadResponse> {
   return await createThread(viewer, request, {
     silentlyFailMembers: request.type === threadTypes.SIDEBAR,
diff --git a/lib/actions/thread-actions.js b/lib/actions/thread-actions.js
--- a/lib/actions/thread-actions.js
+++ b/lib/actions/thread-actions.js
@@ -11,7 +11,7 @@
   ChangeThreadSettingsPayload,
   LeaveThreadPayload,
   UpdateThreadRequest,
-  ClientNewThreadRequest,
+  ClientNewThinThreadRequest,
   NewThreadResult,
   ClientThreadJoinRequest,
   ThreadJoinPayload,
@@ -207,7 +207,7 @@
 const newThinThread =
   (
     callKeyserverEndpoint: CallKeyserverEndpoint,
-  ): ((input: ClientNewThreadRequest) => Promise<NewThreadResult>) =>
+  ): ((input: ClientNewThinThreadRequest) => Promise<NewThreadResult>) =>
   async input => {
     const parentThreadID = input.parentThreadID ?? genesis().id;
     const keyserverID = extractKeyserverIDFromID(parentThreadID);
@@ -225,7 +225,7 @@
   };
 
 function useNewThinThread(): (
-  input: ClientNewThreadRequest,
+  input: ClientNewThinThreadRequest,
 ) => Promise<NewThreadResult> {
   return useKeyserverCall(newThinThread);
 }
diff --git a/lib/shared/thread-actions-utils.js b/lib/shared/thread-actions-utils.js
--- a/lib/shared/thread-actions-utils.js
+++ b/lib/shared/thread-actions-utils.js
@@ -20,7 +20,7 @@
 import { threadTypes } from '../types/thread-types-enum.js';
 import type {
   ChangeThreadSettingsPayload,
-  ClientNewThreadRequest,
+  ClientNewThinThreadRequest,
   NewThreadResult,
 } from '../types/thread-types.js';
 import type { DispatchActionPromise } from '../utils/redux-promise-utils.js';
@@ -47,7 +47,7 @@
 type CreateRealThreadParameters = {
   +threadInfo: ThreadInfo,
   +dispatchActionPromise: DispatchActionPromise,
-  +createNewThinThread: ClientNewThreadRequest => Promise<NewThreadResult>,
+  +createNewThinThread: ClientNewThinThreadRequest => Promise<NewThreadResult>,
   +sourceMessageID: ?string,
   +viewerID: ?string,
   +handleError?: () => mixed,
diff --git a/lib/types/thread-types.js b/lib/types/thread-types.js
--- a/lib/types/thread-types.js
+++ b/lib/types/thread-types.js
@@ -261,7 +261,7 @@
   +initialMemberIDs?: ?$ReadOnlyArray<string>,
   +ghostMemberIDs?: ?$ReadOnlyArray<string>,
 };
-type NewThreadRequest =
+type NewThinThreadRequest =
   | {
       +type: 3 | 4 | 6 | 7 | 8 | 9 | 10 | 11 | 12,
       ...BaseNewThreadRequest,
@@ -272,12 +272,12 @@
       ...BaseNewThreadRequest,
     };
 
-export type ClientNewThreadRequest = {
-  ...NewThreadRequest,
+export type ClientNewThinThreadRequest = {
+  ...NewThinThreadRequest,
   +calendarQuery: CalendarQuery,
 };
-export type ServerNewThreadRequest = {
-  ...NewThreadRequest,
+export type ServerNewThinThreadRequest = {
+  ...NewThinThreadRequest,
   +calendarQuery?: ?CalendarQuery,
 };
 
diff --git a/native/input/input-state-container.react.js b/native/input/input-state-container.react.js
--- a/native/input/input-state-container.react.js
+++ b/native/input/input-state-container.react.js
@@ -85,7 +85,7 @@
 } from 'lib/types/report-types.js';
 import { threadTypes } from 'lib/types/thread-types-enum.js';
 import {
-  type ClientNewThreadRequest,
+  type ClientNewThinThreadRequest,
   type NewThreadResult,
 } from 'lib/types/thread-types.js';
 import { getConfig } from 'lib/utils/config.js';
@@ -155,7 +155,9 @@
     input: SendMultimediaMessageInput,
   ) => Promise<SendMessageResult>,
   +sendTextMessage: (input: SendTextMessageInput) => Promise<SendMessageResult>,
-  +newThinThread: (request: ClientNewThreadRequest) => Promise<NewThreadResult>,
+  +newThinThread: (
+    request: ClientNewThinThreadRequest,
+  ) => Promise<NewThreadResult>,
   +textMessageCreationSideEffectsFunc: CreationSideEffectsFunc<RawTextMessageInfo>,
 };
 type State = {
diff --git a/web/input/input-state-container.react.js b/web/input/input-state-container.react.js
--- a/web/input/input-state-container.react.js
+++ b/web/input/input-state-container.react.js
@@ -82,7 +82,7 @@
 import { reportTypes } from 'lib/types/report-types.js';
 import { threadTypes } from 'lib/types/thread-types-enum.js';
 import {
-  type ClientNewThreadRequest,
+  type ClientNewThinThreadRequest,
   type NewThreadResult,
 } from 'lib/types/thread-types.js';
 import {
@@ -149,7 +149,9 @@
     input: LegacySendMultimediaMessageInput,
   ) => Promise<SendMessageResult>,
   +sendTextMessage: (input: SendTextMessageInput) => Promise<SendMessageResult>,
-  +newThinThread: (request: ClientNewThreadRequest) => Promise<NewThreadResult>,
+  +newThinThread: (
+    request: ClientNewThinThreadRequest,
+  ) => Promise<NewThreadResult>,
   +pushModal: PushModal,
   +sendCallbacks: $ReadOnlyArray<() => mixed>,
   +registerSendCallback: (() => mixed) => void,