diff --git a/packages/client/src/components/post-form.vue b/packages/client/src/components/post-form.vue
index 09be0c192..3bae9ba57 100644
--- a/packages/client/src/components/post-form.vue
+++ b/packages/client/src/components/post-form.vue
@@ -97,7 +97,7 @@ const props = withDefaults(defineProps<{
 	mention?: foundkey.entities.User;
 	specified?: foundkey.entities.User;
 	initialText?: string;
-	initialVisibility?: typeof foundkey.noteVisibilities;
+	initialVisibility?: foundkey.NoteVisibility;
 	initialFiles?: foundkey.entities.DriveFile[];
 	initialLocalOnly?: boolean;
 	initialVisibleUsers?: foundkey.entities.User[];
@@ -134,7 +134,7 @@ let useCw = $ref(false);
 let showPreview = $ref(false);
 let cw = $ref<string | null>(null);
 let localOnly = $ref<boolean>(props.initialLocalOnly ?? defaultStore.state.defaultNoteLocalOnly);
-let visibility = $ref(props.initialVisibility ?? defaultStore.state.defaultNoteVisibility as typeof foundkey.noteVisibilities[number]);
+let visibility = $ref(props.initialVisibility ?? defaultStore.state.defaultNoteVisibility as foundkey.NoteVisibility);
 let visibleUsers = $ref([]);
 if (props.initialVisibleUsers) {
 	props.initialVisibleUsers.forEach(pushVisibleUser);
@@ -144,21 +144,6 @@ let hasNotSpecifiedMentions = $ref(false);
 let recentHashtags = $ref(JSON.parse(localStorage.getItem('hashtags') || '[]'));
 let imeText = $ref('');
 
-// TODO: compat with misskey-js, should likely be moved into foundkey-js
-const visibilityScore = (a: string): number => {
-	switch (a) {
-		case 'specified':
-			return 0;
-		case 'followers':
-			return 1;
-		case 'home':
-			return 2;
-		case 'public': default:
-			return 3;
-	}
-};
-const minVisibility = (a: string, b: string): string => visibilityScore(b) > visibilityScore(a) ? a : b;
-
 const typing = throttle(3000, () => {
 	if (props.channel) {
 		stream.send('typingOnChannel', { channel: props.channel.id });
@@ -271,7 +256,7 @@ if (props.channel) {
 }
 
 if (props.reply) {
-	visibility = minVisibility(props.reply.visibility, visibility);
+	visibility = foundkey.minVisibility(props.reply.visibility, visibility);
 	if (visibility === 'specified') {
 		os.api('users/show', {
 			userIds: props.reply.visibleUserIds.filter(uid => uid !== $i.id && uid !== props.reply.userId),
diff --git a/packages/foundkey-js/src/consts.ts b/packages/foundkey-js/src/consts.ts
index 261ecd33f..df73e829d 100644
--- a/packages/foundkey-js/src/consts.ts
+++ b/packages/foundkey-js/src/consts.ts
@@ -1,7 +1,5 @@
 export const notificationTypes = ['follow', 'mention', 'reply', 'renote', 'quote', 'reaction', 'pollVote', 'pollEnded', 'receiveFollowRequest', 'followRequestAccepted', 'groupInvited', 'app'] as const;
 
-export const noteVisibilities = ['public', 'home', 'followers', 'specified'] as const;
-
 export const mutedNoteReasons = ['word', 'manual', 'spam', 'other'] as const;
 
 export const ffVisibility = ['public', 'followers', 'private'] as const;
diff --git a/packages/foundkey-js/src/entities.ts b/packages/foundkey-js/src/entities.ts
index 90cee3f4d..6746d0fed 100644
--- a/packages/foundkey-js/src/entities.ts
+++ b/packages/foundkey-js/src/entities.ts
@@ -1,3 +1,5 @@
+import { NoteVisibility } from './visibility.js';
+
 export type ID = string;
 export type DateString = string;
 
@@ -138,7 +140,7 @@ export type Note = {
 	renoteId: Note['id'];
 	files: DriveFile[];
 	fileIds: DriveFile['id'][];
-	visibility: 'public' | 'home' | 'followers' | 'specified';
+	visibility: NoteVisibility;
 	visibleUserIds?: User['id'][];
 	localOnly?: boolean;
 	myReaction?: string;
diff --git a/packages/foundkey-js/src/index.ts b/packages/foundkey-js/src/index.ts
index ba4d356af..61d34310b 100644
--- a/packages/foundkey-js/src/index.ts
+++ b/packages/foundkey-js/src/index.ts
@@ -2,10 +2,14 @@ export { Endpoints } from './api.types.js';
 export { default as Stream, Connection as ChannelConnection } from './streaming.js';
 export { Channels } from './streaming.types.js';
 export { Acct } from './acct.js';
+export {
+	noteVisibilities,
+	NoteVisibility,
+	minVisibility,
+} from './visibility.js';
 export {
 	permissions,
 	notificationTypes,
-	noteVisibilities,
 	mutedNoteReasons,
 	ffVisibility,
 } from './consts.js';
diff --git a/packages/foundkey-js/src/visibility.ts b/packages/foundkey-js/src/visibility.ts
new file mode 100644
index 000000000..3a29fe79e
--- /dev/null
+++ b/packages/foundkey-js/src/visibility.ts
@@ -0,0 +1,17 @@
+/**
+ * Possible visibilities of notes.
+ * Ordered most public first.
+ */
+export const noteVisibilities = ['public', 'home', 'followers', 'specified'] as const;
+
+export type NoteVisibility = typeof noteVisibilities[number];
+
+export function minVisibility(a: NoteVisibility, b: NoteVisibility): NoteVisibility {
+	return noteVisibilities[
+		// larger index means more private, so pick the largest index
+		Math.max(
+			noteVisibilities.indexOf(a),
+			noteVisibilities.indexOf(b),
+		)
+	];
+}