diff --git a/apps/mana/apps/web/src/lib/modules/cards/collections.ts b/apps/mana/apps/web/src/lib/modules/cards/collections.ts
index c7cd5daeb..76d635385 100644
--- a/apps/mana/apps/web/src/lib/modules/cards/collections.ts
+++ b/apps/mana/apps/web/src/lib/modules/cards/collections.ts
@@ -24,7 +24,6 @@ export const CARDS_GUEST_SEED = {
 			description: 'Lerne Cards kennen mit diesen Beispiel-Karteikarten.',
 			color: '#6366f1',
 			cardCount: 3,
-			isPublic: false,
 		},
 	],
 	cards: [
diff --git a/apps/mana/apps/web/src/lib/modules/cards/components/CreateDeckModal.svelte b/apps/mana/apps/web/src/lib/modules/cards/components/CreateDeckModal.svelte
index d793c702a..04331d7fe 100644
--- a/apps/mana/apps/web/src/lib/modules/cards/components/CreateDeckModal.svelte
+++ b/apps/mana/apps/web/src/lib/modules/cards/components/CreateDeckModal.svelte
@@ -13,7 +13,6 @@
 
 	let title = $state('');
 	let description = $state('');
-	let isPublic = $state(false);
 	let color = $state(DEFAULT_COLOR);
 	let submitting = $state(false);
 	let selectedTagIds = $state<string[]>([]);
@@ -27,7 +26,6 @@
 		const deck = await deckStore.createDeck({
 			title: title.trim(),
 			description: description.trim() || undefined,
-			isPublic,
 		});
 
 		submitting = false;
@@ -35,7 +33,6 @@
 		if (deck) {
 			title = '';
 			description = '';
-			isPublic = false;
 			open = false;
 			onClose?.();
 		}
@@ -96,18 +93,6 @@
 					></textarea>
 				</div>
 
-				<div class="flex items-center gap-2">
-					<input
-						type="checkbox"
-						id="deck-public"
-						bind:checked={isPublic}
-						class="h-4 w-4 rounded border-border"
-					/>
-					<label for="deck-public" class="cursor-pointer text-sm text-foreground">
-						Offentlich machen
-					</label>
-				</div>
-
 				<div>
 					<span class="mb-1 block text-sm font-medium text-foreground">Tags</span>
 					<TagField
diff --git a/apps/mana/apps/web/src/lib/modules/cards/components/DeckCard.svelte b/apps/mana/apps/web/src/lib/modules/cards/components/DeckCard.svelte
index 1bbf8c538..c3c488965 100644
--- a/apps/mana/apps/web/src/lib/modules/cards/components/DeckCard.svelte
+++ b/apps/mana/apps/web/src/lib/modules/cards/components/DeckCard.svelte
@@ -39,7 +39,7 @@
 		>
 			<div class="flex items-center gap-2">
 				<span>{deck.cardCount || 0} Karten</span>
-				{#if deck.isPublic}
+				{#if deck.visibility === 'public'}
 					<span class="rounded-full bg-primary/10 px-2 py-0.5 text-xs text-primary">
 						Öffentlich
 					</span>
diff --git a/apps/mana/apps/web/src/lib/modules/cards/queries.ts b/apps/mana/apps/web/src/lib/modules/cards/queries.ts
index 1743c40fd..5ecbd4741 100644
--- a/apps/mana/apps/web/src/lib/modules/cards/queries.ts
+++ b/apps/mana/apps/web/src/lib/modules/cards/queries.ts
@@ -18,8 +18,7 @@ export function toDeck(local: LocalDeck): Deck {
 		title: local.name,
 		description: local.description ?? undefined,
 		color: local.color,
-		isPublic: local.isPublic ?? local.visibility === 'public',
-		visibility: local.visibility ?? (local.isPublic === true ? 'public' : 'space'),
+		visibility: local.visibility ?? 'space',
 		tags: [],
 		cardCount: local.cardCount,
 		createdAt: local.createdAt ?? new Date().toISOString(),
@@ -83,7 +82,7 @@ export function getDeckById(decks: Deck[], id: string): Deck | undefined {
 }
 
 export function getPublicDecks(decks: Deck[]): Deck[] {
-	return decks.filter((d) => d.isPublic);
+	return decks.filter((d) => d.visibility === 'public');
 }
 
 export function getCardCountForDeck(cards: Card[], deckId: string): number {
diff --git a/apps/mana/apps/web/src/lib/modules/cards/stores/decks.svelte.ts b/apps/mana/apps/web/src/lib/modules/cards/stores/decks.svelte.ts
index bcf4d49cb..dcac530d6 100644
--- a/apps/mana/apps/web/src/lib/modules/cards/stores/decks.svelte.ts
+++ b/apps/mana/apps/web/src/lib/modules/cards/stores/decks.svelte.ts
@@ -28,17 +28,13 @@ export const deckStore = {
 	async createDeck(input: CreateDeckInput): Promise<Deck | null> {
 		error = null;
 		try {
-			const initialPublic = input.isPublic ?? false;
 			const newLocal: LocalDeck = {
 				id: crypto.randomUUID(),
 				name: input.title,
 				description: input.description ?? null,
 				color: '#6366f1',
 				cardCount: 0,
-				isPublic: initialPublic,
-				// Initialize the unified field too — if the create flow set
-				// isPublic, mirror it as 'public'; otherwise space-default.
-				visibility: initialPublic ? 'public' : defaultVisibilityFor(getActiveSpace()?.type),
+				visibility: defaultVisibilityFor(getActiveSpace()?.type),
 			};
 
 			const plaintextSnapshot = toDeck(newLocal);
@@ -59,12 +55,6 @@ export const deckStore = {
 			const localUpdates: Partial<LocalDeck> = {};
 			if (updates.title !== undefined) localUpdates.name = updates.title;
 			if (updates.description !== undefined) localUpdates.description = updates.description;
-			if (updates.isPublic !== undefined) {
-				// Legacy callers still pass isPublic — mirror to visibility
-				// so the unified field stays in sync until M6.1 hard-drop.
-				localUpdates.isPublic = updates.isPublic;
-				localUpdates.visibility = updates.isPublic ? 'public' : 'space';
-			}
 
 			const diff: Partial<LocalDeck> = {
 				...localUpdates,
@@ -79,20 +69,18 @@ export const deckStore = {
 	},
 
 	/**
-	 * Flip a deck's visibility. M6 soft-migration: writes both
-	 * `visibility` and the legacy `isPublic` mirror so the picker
-	 * coexists with the older "public" badge UI until M6.1 hard-drop.
+	 * Flip a deck's visibility. Public decks surface in the cards
+	 * embed-resolver on the user's website.
 	 */
 	async setVisibility(id: string, next: VisibilityLevel) {
 		const existing = await cardDeckTable.get(id);
 		if (!existing) throw new Error(`Deck ${id} not found`);
-		const before: VisibilityLevel = existing.visibility ?? (existing.isPublic ? 'public' : 'space');
+		const before: VisibilityLevel = existing.visibility ?? 'space';
 		if (before === next) return;
 
 		const stamp = new Date().toISOString();
 		await cardDeckTable.update(id, {
 			visibility: next,
-			isPublic: next === 'public',
 			visibilityChangedAt: stamp,
 			visibilityChangedBy: getEffectiveUserId(),
 			updatedAt: stamp,
diff --git a/apps/mana/apps/web/src/lib/modules/cards/types.ts b/apps/mana/apps/web/src/lib/modules/cards/types.ts
index afc6829ca..be2d5aaeb 100644
--- a/apps/mana/apps/web/src/lib/modules/cards/types.ts
+++ b/apps/mana/apps/web/src/lib/modules/cards/types.ts
@@ -11,8 +11,6 @@ export interface LocalDeck extends BaseRecord {
 	color: string;
 	cardCount: number;
 	lastStudied?: string | null;
-	/** @deprecated Use `visibility`. Mirror kept until M6.1 hard-drop. */
-	isPublic: boolean;
 	visibility?: VisibilityLevel;
 	visibilityChangedAt?: string;
 	visibilityChangedBy?: string;
@@ -36,8 +34,6 @@ export interface Deck {
 	title: string;
 	description?: string;
 	color: string;
-	/** @deprecated Use `visibility`. */
-	isPublic: boolean;
 	visibility: VisibilityLevel;
 	tags: string[];
 	cardCount: number;
@@ -61,13 +57,11 @@ export interface Card {
 export interface CreateDeckInput {
 	title: string;
 	description?: string;
-	isPublic?: boolean;
 }
 
 export interface UpdateDeckInput {
 	title?: string;
 	description?: string;
-	isPublic?: boolean;
 }
 
 export interface CreateCardInput {
diff --git a/apps/mana/apps/web/src/lib/modules/cards/views/DetailView.svelte b/apps/mana/apps/web/src/lib/modules/cards/views/DetailView.svelte
index 9cfe6bb38..cacda7926 100644
--- a/apps/mana/apps/web/src/lib/modules/cards/views/DetailView.svelte
+++ b/apps/mana/apps/web/src/lib/modules/cards/views/DetailView.svelte
@@ -98,7 +98,7 @@
 			<div class="prop-row">
 				<span class="prop-label">Sichtbarkeit</span>
 				<VisibilityPicker
-					level={deck.visibility ?? (deck.isPublic ? 'public' : 'space')}
+					level={deck.visibility ?? 'space'}
 					onChange={(next: VisibilityLevel) => deckStore.setVisibility(deckId, next)}
 					disabledLevels={['unlisted']}
 				/>
diff --git a/apps/mana/apps/web/src/lib/modules/memoro/collections.ts b/apps/mana/apps/web/src/lib/modules/memoro/collections.ts
index 4c63422f1..049cd0cf2 100644
--- a/apps/mana/apps/web/src/lib/modules/memoro/collections.ts
+++ b/apps/mana/apps/web/src/lib/modules/memoro/collections.ts
@@ -39,7 +39,6 @@ export const MEMORO_GUEST_SEED = {
 			processingStatus: 'completed' as const,
 			isArchived: false,
 			isPinned: true,
-			isPublic: false,
 			blueprintId: null,
 			language: 'de',
 		},
diff --git a/apps/mana/apps/web/src/lib/modules/memoro/queries.ts b/apps/mana/apps/web/src/lib/modules/memoro/queries.ts
index 760208981..4de56d5a3 100644
--- a/apps/mana/apps/web/src/lib/modules/memoro/queries.ts
+++ b/apps/mana/apps/web/src/lib/modules/memoro/queries.ts
@@ -35,12 +35,7 @@ export function toMemo(local: LocalMemo): Memo {
 		processingStatus: local.processingStatus,
 		isArchived: local.isArchived,
 		isPinned: local.isPinned,
-		isPublic: local.isPublic ?? local.visibility === 'public',
-		// Soft-fallback during M6 soak: legacy rows use isPublic, new
-		// writes set visibility directly. Keep both in sync via the
-		// store's setVisibility/setPublic methods until M6.1 drops the
-		// legacy field.
-		visibility: local.visibility ?? (local.isPublic === true ? 'public' : 'space'),
+		visibility: local.visibility ?? 'space',
 		language: local.language,
 		createdAt: local.createdAt ?? new Date().toISOString(),
 		updatedAt: local.updatedAt ?? new Date().toISOString(),
diff --git a/apps/mana/apps/web/src/lib/modules/memoro/stores/memos.svelte.ts b/apps/mana/apps/web/src/lib/modules/memoro/stores/memos.svelte.ts
index 2c5523fa4..5ab2e1bf1 100644
--- a/apps/mana/apps/web/src/lib/modules/memoro/stores/memos.svelte.ts
+++ b/apps/mana/apps/web/src/lib/modules/memoro/stores/memos.svelte.ts
@@ -45,7 +45,6 @@ export const memosStore = {
 			processingStatus: data.processingStatus ?? (data.transcript ? 'completed' : 'pending'),
 			isArchived: false,
 			isPinned: false,
-			isPublic: false,
 			visibility: defaultVisibilityFor(getActiveSpace()?.type),
 			blueprintId: data.blueprintId ?? null,
 			language: data.language ?? null,
@@ -141,7 +140,7 @@ export const memosStore = {
 	/** Update a memo's fields. */
 	async update(
 		id: string,
-		data: Partial<Pick<LocalMemo, 'title' | 'intro' | 'transcript' | 'language' | 'isPublic'>>
+		data: Partial<Pick<LocalMemo, 'title' | 'intro' | 'transcript' | 'language'>>
 	) {
 		const diff: Partial<LocalMemo> = {
 			...data,
@@ -173,22 +172,18 @@ export const memosStore = {
 	unarchive: (id: string) => memoArchive.unarchive(id),
 
 	/**
-	 * Flip a memo's visibility. M6 soft-migration: writes both
-	 * `visibility` and the legacy `isPublic` mirror so older readers
-	 * (search index, server snapshots) keep working until the M6.1
-	 * hard-drop. Public memos surface in the user's website embed
-	 * once a memoro embed-resolver lands.
+	 * Flip a memo's visibility. Public memos surface in the user's
+	 * website embed via the memoro embed-resolver.
 	 */
 	async setVisibility(id: string, next: VisibilityLevel) {
 		const existing = await memoTable.get(id);
 		if (!existing) throw new Error(`Memo ${id} not found`);
-		const before: VisibilityLevel = existing.visibility ?? (existing.isPublic ? 'public' : 'space');
+		const before: VisibilityLevel = existing.visibility ?? 'space';
 		if (before === next) return;
 
 		const stamp = new Date().toISOString();
 		await memoTable.update(id, {
 			visibility: next,
-			isPublic: next === 'public',
 			visibilityChangedAt: stamp,
 			visibilityChangedBy: getEffectiveUserId(),
 			updatedAt: stamp,
diff --git a/apps/mana/apps/web/src/lib/modules/memoro/types.ts b/apps/mana/apps/web/src/lib/modules/memoro/types.ts
index 9ba9d810d..a51fd2cc0 100644
--- a/apps/mana/apps/web/src/lib/modules/memoro/types.ts
+++ b/apps/mana/apps/web/src/lib/modules/memoro/types.ts
@@ -16,14 +16,6 @@ export interface LocalMemo extends BaseRecord {
 	processingStatus: ProcessingStatus;
 	isArchived: boolean;
 	isPinned: boolean;
-	/**
-	 * @deprecated Soft-migrating to unified `visibility`. Kept for the
-	 * soak window so the converter can fall back to `isPublic` for
-	 * legacy rows that haven't been touched since the M6 rollout.
-	 * Hard-drop once `visibility` has propagated to all rows.
-	 */
-	isPublic?: boolean;
-	/** Unified visibility (M6 pilot — replaces isPublic). */
 	visibility?: VisibilityLevel;
 	visibilityChangedAt?: string;
 	visibilityChangedBy?: string;
@@ -95,8 +87,6 @@ export interface Memo {
 	processingStatus: ProcessingStatus;
 	isArchived: boolean;
 	isPinned: boolean;
-	/** @deprecated Use `visibility`. Mirror kept until M6.1 hard-drop. */
-	isPublic: boolean;
 	visibility: VisibilityLevel;
 	language: string | null;
 	createdAt: string;
diff --git a/apps/mana/apps/web/src/lib/modules/memoro/views/DetailView.svelte b/apps/mana/apps/web/src/lib/modules/memoro/views/DetailView.svelte
index 4c4a0573c..44a9eba46 100644
--- a/apps/mana/apps/web/src/lib/modules/memoro/views/DetailView.svelte
+++ b/apps/mana/apps/web/src/lib/modules/memoro/views/DetailView.svelte
@@ -194,7 +194,7 @@
 			<div class="prop-row">
 				<span class="prop-label">Sichtbarkeit</span>
 				<VisibilityPicker
-					level={memo.visibility ?? (memo.isPublic ? 'public' : 'space')}
+					level={memo.visibility ?? 'space'}
 					onChange={(next: VisibilityLevel) => memosStore.setVisibility(memoId, next)}
 					disabledLevels={['unlisted']}
 				/>
diff --git a/apps/mana/apps/web/src/lib/modules/picture/queries.ts b/apps/mana/apps/web/src/lib/modules/picture/queries.ts
index e2bf198a8..81b96ef09 100644
--- a/apps/mana/apps/web/src/lib/modules/picture/queries.ts
+++ b/apps/mana/apps/web/src/lib/modules/picture/queries.ts
@@ -38,9 +38,7 @@ export function toImage(local: LocalImage): Image {
 		height: local.height ?? undefined,
 		fileSize: local.fileSize ?? undefined,
 		blurhash: local.blurhash ?? undefined,
-		// Soft-migration fallback: rows written before M3 only have the
-		// legacy `isPublic` flag; map it to the nearest visibility level.
-		visibility: local.visibility ?? (local.isPublic === true ? 'public' : 'private'),
+		visibility: local.visibility ?? 'private',
 		isFavorite: local.isFavorite,
 		downloadCount: local.downloadCount,
 		rating: local.rating ?? undefined,
@@ -68,7 +66,7 @@ export function toBoard(local: LocalBoard): Board {
 		canvasWidth: local.canvasWidth,
 		canvasHeight: local.canvasHeight,
 		backgroundColor: local.backgroundColor,
-		visibility: local.visibility ?? (local.isPublic === true ? 'public' : 'private'),
+		visibility: local.visibility ?? 'private',
 		createdAt: local.createdAt ?? new Date().toISOString(),
 		updatedAt: local.updatedAt ?? new Date().toISOString(),
 	};
diff --git a/apps/mana/apps/web/src/lib/modules/picture/stores/boards.svelte.ts b/apps/mana/apps/web/src/lib/modules/picture/stores/boards.svelte.ts
index 365ff25bb..275d05854 100644
--- a/apps/mana/apps/web/src/lib/modules/picture/stores/boards.svelte.ts
+++ b/apps/mana/apps/web/src/lib/modules/picture/stores/boards.svelte.ts
@@ -190,8 +190,7 @@ export const boardsStore = {
 		try {
 			const existing = await db.table<LocalBoard>('boards').get(id);
 			if (!existing) return { success: false, error: 'Board not found' };
-			const before: VisibilityLevel =
-				existing.visibility ?? (existing.isPublic === true ? 'public' : 'private');
+			const before: VisibilityLevel = existing.visibility ?? 'private';
 			if (before === next) return { success: true };
 
 			const now = new Date().toISOString();
diff --git a/apps/mana/apps/web/src/lib/modules/picture/types.ts b/apps/mana/apps/web/src/lib/modules/picture/types.ts
index 5436cbc6a..5dd19dd59 100644
--- a/apps/mana/apps/web/src/lib/modules/picture/types.ts
+++ b/apps/mana/apps/web/src/lib/modules/picture/types.ts
@@ -26,12 +26,6 @@ export interface LocalImage extends BaseRecord {
 	height?: number | null;
 	fileSize?: number | null;
 	blurhash?: string | null;
-	/**
-	 * @deprecated Use `visibility` instead. Kept for the soft-migration
-	 * window — will be dropped in the hard follow-up once no reader
-	 * references it. See docs/plans/visibility-system.md §M3.
-	 */
-	isPublic?: boolean;
 	visibility?: VisibilityLevel;
 	visibilityChangedAt?: string;
 	visibilityChangedBy?: string;
@@ -95,11 +89,6 @@ export interface LocalBoard extends BaseRecord {
 	canvasWidth: number;
 	canvasHeight: number;
 	backgroundColor: string;
-	/**
-	 * @deprecated Use `visibility` instead. Kept during the M3 soft
-	 * migration — dropped in the hard follow-up.
-	 */
-	isPublic?: boolean;
 	visibility?: VisibilityLevel;
 	visibilityChangedAt?: string;
 	visibilityChangedBy?: string;
diff --git a/apps/mana/apps/web/src/lib/modules/presi/ListView.svelte b/apps/mana/apps/web/src/lib/modules/presi/ListView.svelte
index 20d9c3ff5..d34e88b84 100644
--- a/apps/mana/apps/web/src/lib/modules/presi/ListView.svelte
+++ b/apps/mana/apps/web/src/lib/modules/presi/ListView.svelte
@@ -110,7 +110,7 @@
 			<p class="truncate text-sm font-medium text-foreground">{deck.title}</p>
 			<div class="mt-1 flex items-center gap-2 text-xs text-muted-foreground">
 				<span>{slideCount(deck.id)} Folien</span>
-				{#if deck.isPublic}
+				{#if deck.visibility === 'public'}
 					<span class="rounded bg-muted px-1.5 py-0.5 text-[10px]">Öffentlich</span>
 				{/if}
 			</div>
diff --git a/apps/mana/apps/web/src/lib/modules/presi/collections.ts b/apps/mana/apps/web/src/lib/modules/presi/collections.ts
index 5b8bcdbaa..863701cca 100644
--- a/apps/mana/apps/web/src/lib/modules/presi/collections.ts
+++ b/apps/mana/apps/web/src/lib/modules/presi/collections.ts
@@ -22,7 +22,6 @@ export const PRESI_GUEST_SEED = {
 			id: ONBOARDING_DECK_ID,
 			title: 'Willkommen bei Presi',
 			description: 'Eine kurze Einfuhrung in die Prasentations-App.',
-			isPublic: false,
 		},
 	],
 	slides: [
diff --git a/apps/mana/apps/web/src/lib/modules/presi/queries.ts b/apps/mana/apps/web/src/lib/modules/presi/queries.ts
index 57ec34211..a8b79559c 100644
--- a/apps/mana/apps/web/src/lib/modules/presi/queries.ts
+++ b/apps/mana/apps/web/src/lib/modules/presi/queries.ts
@@ -19,8 +19,7 @@ export function toDeck(local: LocalDeck): Deck {
 		title: local.title,
 		description: local.description ?? undefined,
 		themeId: local.themeId ?? undefined,
-		isPublic: local.isPublic ?? local.visibility === 'public',
-		visibility: local.visibility ?? (local.isPublic === true ? 'public' : 'space'),
+		visibility: local.visibility ?? 'space',
 		createdAt: local.createdAt ?? new Date().toISOString(),
 		updatedAt: local.updatedAt ?? new Date().toISOString(),
 	};
diff --git a/apps/mana/apps/web/src/lib/modules/presi/stores/decks.svelte.ts b/apps/mana/apps/web/src/lib/modules/presi/stores/decks.svelte.ts
index 464d4b063..f01cecaa7 100644
--- a/apps/mana/apps/web/src/lib/modules/presi/stores/decks.svelte.ts
+++ b/apps/mana/apps/web/src/lib/modules/presi/stores/decks.svelte.ts
@@ -39,7 +39,6 @@ function createDecksStore() {
 				title: dto.title,
 				description: dto.description || null,
 				themeId: dto.themeId || null,
-				isPublic: false,
 				visibility: defaultVisibilityFor(getActiveSpace()?.type),
 			};
 			const plaintextSnapshot = toDeck(newLocal);
@@ -65,11 +64,6 @@ function createDecksStore() {
 			if (dto.title !== undefined) localUpdates.title = dto.title;
 			if (dto.description !== undefined) localUpdates.description = dto.description;
 			if (dto.themeId !== undefined) localUpdates.themeId = dto.themeId;
-			if (dto.isPublic !== undefined) {
-				// Mirror to unified visibility during M6 soak.
-				localUpdates.isPublic = dto.isPublic;
-				localUpdates.visibility = dto.isPublic ? 'public' : 'space';
-			}
 
 			await encryptRecord('presiDecks', localUpdates);
 			await presiDeckTable.update(id, localUpdates);
@@ -85,13 +79,11 @@ function createDecksStore() {
 		try {
 			const existing = await presiDeckTable.get(id);
 			if (!existing) return false;
-			const before: VisibilityLevel =
-				existing.visibility ?? (existing.isPublic ? 'public' : 'space');
+			const before: VisibilityLevel = existing.visibility ?? 'space';
 			if (before === next) return true;
 			const stamp = new Date().toISOString();
 			await presiDeckTable.update(id, {
 				visibility: next,
-				isPublic: next === 'public',
 				visibilityChangedAt: stamp,
 				visibilityChangedBy: getEffectiveUserId(),
 				updatedAt: stamp,
diff --git a/apps/mana/apps/web/src/lib/modules/presi/types.ts b/apps/mana/apps/web/src/lib/modules/presi/types.ts
index 20baf1c9c..c04b568d2 100644
--- a/apps/mana/apps/web/src/lib/modules/presi/types.ts
+++ b/apps/mana/apps/web/src/lib/modules/presi/types.ts
@@ -9,8 +9,6 @@ export interface LocalDeck extends BaseRecord {
 	title: string;
 	description?: string | null;
 	themeId?: string | null;
-	/** @deprecated Use `visibility`. Mirror kept until M6.1 hard-drop. */
-	isPublic: boolean;
 	visibility?: VisibilityLevel;
 	visibilityChangedAt?: string;
 	visibilityChangedBy?: string;
@@ -39,8 +37,6 @@ export interface Deck {
 	title: string;
 	description?: string;
 	themeId?: string;
-	/** @deprecated Use `visibility`. */
-	isPublic: boolean;
 	visibility: VisibilityLevel;
 	createdAt: string;
 	updatedAt: string;
@@ -66,7 +62,6 @@ export interface UpdateDeckDto {
 	title?: string;
 	description?: string;
 	themeId?: string;
-	isPublic?: boolean;
 }
 
 export interface CreateSlideDto {
diff --git a/apps/mana/apps/web/src/lib/modules/presi/views/DetailView.svelte b/apps/mana/apps/web/src/lib/modules/presi/views/DetailView.svelte
index f3ce9e82b..7ca523d9f 100644
--- a/apps/mana/apps/web/src/lib/modules/presi/views/DetailView.svelte
+++ b/apps/mana/apps/web/src/lib/modules/presi/views/DetailView.svelte
@@ -84,7 +84,7 @@
 			<div class="prop-row">
 				<span class="prop-label">Sichtbarkeit</span>
 				<VisibilityPicker
-					level={deck.visibility ?? (deck.isPublic ? 'public' : 'space')}
+					level={deck.visibility ?? 'space'}
 					onChange={(next: VisibilityLevel) => decksStore.setVisibility(deckId, next)}
 					disabledLevels={['unlisted']}
 				/>
diff --git a/apps/mana/apps/web/src/lib/modules/uload/collections.ts b/apps/mana/apps/web/src/lib/modules/uload/collections.ts
index ff1f893ea..211677d71 100644
--- a/apps/mana/apps/web/src/lib/modules/uload/collections.ts
+++ b/apps/mana/apps/web/src/lib/modules/uload/collections.ts
@@ -87,7 +87,6 @@ export const ULOAD_GUEST_SEED = {
 			slug: 'social-media',
 			color: '#8b5cf6',
 			icon: null,
-			isPublic: false,
 			visibility: 'space',
 			usageCount: 0,
 		},
@@ -97,7 +96,6 @@ export const ULOAD_GUEST_SEED = {
 			slug: 'dokumentation',
 			color: '#3b82f6',
 			icon: null,
-			isPublic: false,
 			visibility: 'space',
 			usageCount: 0,
 		},
@@ -107,7 +105,6 @@ export const ULOAD_GUEST_SEED = {
 			slug: 'marketing',
 			color: '#10b981',
 			icon: null,
-			isPublic: false,
 			visibility: 'space',
 			usageCount: 0,
 		},
diff --git a/apps/mana/apps/web/src/lib/modules/uload/queries.ts b/apps/mana/apps/web/src/lib/modules/uload/queries.ts
index 569704bd6..a3501abfb 100644
--- a/apps/mana/apps/web/src/lib/modules/uload/queries.ts
+++ b/apps/mana/apps/web/src/lib/modules/uload/queries.ts
@@ -42,8 +42,6 @@ export interface Tag {
 	slug: string;
 	color?: string;
 	icon?: string;
-	/** @deprecated Use `visibility`. */
-	isPublic: boolean;
 	visibility: import('@mana/shared-privacy').VisibilityLevel;
 	usageCount: number;
 	createdAt: string;
@@ -106,8 +104,7 @@ export function toTag(local: LocalTag): Tag {
 		slug: local.slug,
 		color: local.color ?? undefined,
 		icon: local.icon ?? undefined,
-		isPublic: local.isPublic ?? local.visibility === 'public',
-		visibility: local.visibility ?? (local.isPublic === true ? 'public' : 'space'),
+		visibility: local.visibility ?? 'space',
 		usageCount: local.usageCount,
 		createdAt: local.createdAt ?? new Date().toISOString(),
 		updatedAt: local.updatedAt ?? new Date().toISOString(),
diff --git a/apps/mana/apps/web/src/lib/modules/uload/types.ts b/apps/mana/apps/web/src/lib/modules/uload/types.ts
index 79a390e3d..70dbcd1fe 100644
--- a/apps/mana/apps/web/src/lib/modules/uload/types.ts
+++ b/apps/mana/apps/web/src/lib/modules/uload/types.ts
@@ -30,12 +30,6 @@ export interface LocalTag extends BaseRecord {
 	slug: string;
 	color?: string | null;
 	icon?: string | null;
-	/**
-	 * @deprecated Use `visibility`. Mirror kept for the M6 soak window.
-	 * No active CRUD UI yet — the field is set only by seed data and
-	 * the future tag-management view will write `visibility` directly.
-	 */
-	isPublic: boolean;
 	visibility?: VisibilityLevel;
 	usageCount: number;
 }
diff --git a/apps/mana/apps/web/src/lib/modules/website/embeds.ts b/apps/mana/apps/web/src/lib/modules/website/embeds.ts
index 60c2da77f..6e9f52247 100644
--- a/apps/mana/apps/web/src/lib/modules/website/embeds.ts
+++ b/apps/mana/apps/web/src/lib/modules/website/embeds.ts
@@ -9,10 +9,10 @@ import { formatDateTime } from '$lib/i18n/format';
  * content. Trade-off: publishes are slightly slower, public visits are
  * much faster.
  *
- * Every resolver MUST enforce the source's public-visibility rules —
- * e.g. `picture.board.isPublic === true`. An owner who embeds a
- * private board gets an empty result with a clear error message in the
- * resolved.error field.
+ * Every resolver MUST enforce the source's public-visibility rules
+ * via `canEmbedOnWebsite(visibility)`. An owner who embeds a
+ * non-public record gets an empty result with a clear error message
+ * in the resolved.error field.
  */
 
 import { db } from '$lib/data/database';
@@ -117,8 +117,7 @@ export async function resolveEmbed(props: ModuleEmbedProps): Promise<ResolvedEmb
 /**
  * Picture-board: returns image items for a board whose owner flipped
  * its visibility to 'public' via the VisibilityPicker. `canEmbedOnWebsite`
- * is the hard gate; the soft-migration fallback maps legacy `isPublic`
- * rows (pre-M3) to the right level.
+ * is the hard gate.
  */
 async function resolvePictureBoard(props: ModuleEmbedProps): Promise<EmbedItem[]> {
 	if (!props.sourceId) {
@@ -134,8 +133,7 @@ async function resolvePictureBoard(props: ModuleEmbedProps): Promise<EmbedItem[]
 	if (!rawBoard || rawBoard.deletedAt) {
 		throw new Error('Board nicht gefunden');
 	}
-	const boardVisibility =
-		rawBoard.visibility ?? (rawBoard.isPublic === true ? 'public' : 'private');
+	const boardVisibility = rawBoard.visibility ?? 'private';
 	if (!canEmbedOnWebsite(boardVisibility)) {
 		throw new Error('Board ist nicht öffentlich — setze es im Picture-Modul auf "Öffentlich"');
 	}
@@ -804,10 +802,7 @@ async function resolveSocialEvents(props: ModuleEmbedProps): Promise<EmbedItem[]
 async function resolveMemos(_props: ModuleEmbedProps): Promise<EmbedItem[]> {
 	let memos = await db.table<LocalMemo>('memos').toArray();
 	memos = memos.filter(
-		(m) =>
-			!m.deletedAt &&
-			!m.isArchived &&
-			canEmbedOnWebsite(m.visibility ?? (m.isPublic === true ? 'public' : 'private'))
+		(m) => !m.deletedAt && !m.isArchived && canEmbedOnWebsite(m.visibility ?? 'private')
 	);
 
 	if (memos.length === 0) return [];
@@ -853,11 +848,7 @@ async function resolveMemos(_props: ModuleEmbedProps): Promise<EmbedItem[]> {
  */
 async function resolveCardDecks(_props: ModuleEmbedProps): Promise<EmbedItem[]> {
 	let decks = await db.table<LocalCardDeck>('cardDecks').toArray();
-	decks = decks.filter(
-		(d) =>
-			!d.deletedAt &&
-			canEmbedOnWebsite(d.visibility ?? (d.isPublic === true ? 'public' : 'private'))
-	);
+	decks = decks.filter((d) => !d.deletedAt && canEmbedOnWebsite(d.visibility ?? 'private'));
 
 	if (decks.length === 0) return [];
 
@@ -886,11 +877,7 @@ async function resolveCardDecks(_props: ModuleEmbedProps): Promise<EmbedItem[]>
  */
 async function resolvePresiDecks(_props: ModuleEmbedProps): Promise<EmbedItem[]> {
 	let decks = await db.table<LocalPresiDeck>('presiDecks').toArray();
-	decks = decks.filter(
-		(d) =>
-			!d.deletedAt &&
-			canEmbedOnWebsite(d.visibility ?? (d.isPublic === true ? 'public' : 'private'))
-	);
+	decks = decks.filter((d) => !d.deletedAt && canEmbedOnWebsite(d.visibility ?? 'private'));
 
 	if (decks.length === 0) return [];
 
diff --git a/apps/mana/apps/web/src/routes/(app)/cards/decks/[id]/+page.svelte b/apps/mana/apps/web/src/routes/(app)/cards/decks/[id]/+page.svelte
index 5725f8290..dc837bf67 100644
--- a/apps/mana/apps/web/src/routes/(app)/cards/decks/[id]/+page.svelte
+++ b/apps/mana/apps/web/src/routes/(app)/cards/decks/[id]/+page.svelte
@@ -91,7 +91,7 @@
 				</div>
 
 				<div class="flex items-center gap-2">
-					{#if deck.isPublic}
+					{#if deck.visibility === 'public'}
 						<span class="rounded-full bg-primary/10 px-3 py-1 text-xs text-primary">
 							Offentlich
 						</span>