diff --git a/packages/backend/src/services/lessons.ts b/packages/backend/src/services/lessons.ts
index b00584f..cc963a3 100644
--- a/packages/backend/src/services/lessons.ts
+++ b/packages/backend/src/services/lessons.ts
@@ -18,6 +18,10 @@ function rowToLesson(r: typeof lessons.$inferSelect): Lesson {
     description: r.description ?? null,
     position: r.position,
     bidirectional: r.bidirectional,
+    ownerId: r.ownerId ?? null,
+    visibility: r.visibility,
+    isCurated: r.isCurated,
+    sourceLessonId: r.sourceLessonId ?? null,
     createdAt: r.createdAt,
     updatedAt: r.updatedAt,
   };
diff --git a/packages/shared/src/schemas.ts b/packages/shared/src/schemas.ts
index b0e86ed..b72e460 100644
--- a/packages/shared/src/schemas.ts
+++ b/packages/shared/src/schemas.ts
@@ -108,3 +108,22 @@ export type ChangePasswordInput = z.infer<typeof changePasswordSchema>;
 export type AcceptInviteInput = z.infer<typeof acceptInviteSchema>;
 export type InviteUserInput = z.infer<typeof inviteUserSchema>;
 export type AdminUserUpdateInput = z.infer<typeof adminUserUpdateSchema>;
+
+export const lessonVisibilityUpdateSchema = z.object({
+  visibility: z.enum(['private', 'shared']),
+});
+
+export const adminLessonCuratedSchema = z.object({
+  isCurated: z.boolean(),
+});
+
+export const marketplaceQuerySchema = z.object({
+  q: z.string().trim().max(120).optional(),
+  curated: z.enum(['true', 'false']).optional(),
+  limit: z.coerce.number().int().min(1).max(100).optional(),
+  offset: z.coerce.number().int().min(0).optional(),
+});
+
+export type LessonVisibilityUpdateInput = z.infer<typeof lessonVisibilityUpdateSchema>;
+export type AdminLessonCuratedInput = z.infer<typeof adminLessonCuratedSchema>;
+export type MarketplaceQuery = z.infer<typeof marketplaceQuerySchema>;
diff --git a/packages/shared/src/types.ts b/packages/shared/src/types.ts
index 7a69219..18a90bb 100644
--- a/packages/shared/src/types.ts
+++ b/packages/shared/src/types.ts
@@ -2,6 +2,8 @@ export type Direction = 'forward' | 'backward';
 export type AttemptResult = 'correct' | 'incorrect';
 export type SessionStatus = 'active' | 'completed' | 'abandoned';
 
+export type Visibility = 'private' | 'shared';
+
 export interface Lesson {
   id: number;
   parentId: number | null;
@@ -9,6 +11,10 @@ export interface Lesson {
   description: string | null;
   position: number;
   bidirectional: boolean;
+  ownerId: number | null;
+  visibility: Visibility;
+  isCurated: boolean;
+  sourceLessonId: number | null;
   createdAt: number;
   updatedAt: number;
 }
@@ -92,3 +98,28 @@ export interface PublicUser {
   displayName: string;
   role: Role;
 }
+
+export interface LessonAccess {
+  canEdit: boolean;
+  isOwner: boolean;
+  isSubscribed: boolean;
+}
+
+export interface MarketplaceLesson {
+  id: number;
+  name: string;
+  description: string | null;
+  ownerDisplayName: string;
+  totalCards: number;
+  subscribersCount: number;
+  isCurated: boolean;
+  isFork: boolean;
+  createdAt: number;
+}
+
+export interface SubscriptionEntry {
+  lessonId: number;
+  name: string;
+  ownerDisplayName: string;
+  subscribedAt: number;
+}