diff --git a/src/lib/server/shopping/repository.ts b/src/lib/server/shopping/repository.ts
index 2a40528..2621e31 100644
--- a/src/lib/server/shopping/repository.ts
+++ b/src/lib/server/shopping/repository.ts
@@ -125,8 +125,66 @@ export function toggleCheck(
   }
 }
 
-export function clearCheckedItems(_db: Database.Database): void {
-  throw new Error('not implemented');
+export function clearCheckedItems(db: Database.Database): void {
+  const tx = db.transaction(() => {
+    // Alle aggregierten Zeilen mit checked-Status holen, pro recipe_id gruppieren
+    // und Rezepte finden, deren Zeilen ALLE abgehakt sind.
+    const allRows = db
+      .prepare(
+        `SELECT
+           cr.recipe_id,
+           LOWER(TRIM(i.name)) AS name_key,
+           LOWER(TRIM(COALESCE(i.unit, ''))) AS unit_key,
+           EXISTS(
+             SELECT 1 FROM shopping_cart_check c
+              WHERE c.name_key = LOWER(TRIM(i.name))
+                AND c.unit_key = LOWER(TRIM(COALESCE(i.unit, '')))
+           ) AS checked
+         FROM shopping_cart_recipe cr
+         JOIN ingredient i ON i.recipe_id = cr.recipe_id`
+      )
+      .all() as { recipe_id: number; name_key: string; unit_key: string; checked: 0 | 1 }[];
+
+    const perRecipe = new Map<number, { total: number; checked: number }>();
+    for (const r of allRows) {
+      const e = perRecipe.get(r.recipe_id) ?? { total: 0, checked: 0 };
+      e.total += 1;
+      e.checked += r.checked;
+      perRecipe.set(r.recipe_id, e);
+    }
+    const toRemove: number[] = [];
+    for (const [id, e] of perRecipe) {
+      if (e.total > 0 && e.total === e.checked) toRemove.push(id);
+    }
+    for (const id of toRemove) {
+      db.prepare('DELETE FROM shopping_cart_recipe WHERE recipe_id = ?').run(id);
+    }
+
+    // Orphan-Checks raeumen: alle Check-Keys, die jetzt in KEINEM Cart-Rezept
+    // mehr vorkommen.
+    const activeKeys = db
+      .prepare(
+        `SELECT DISTINCT
+           LOWER(TRIM(i.name)) AS name_key,
+           LOWER(TRIM(COALESCE(i.unit, ''))) AS unit_key
+         FROM shopping_cart_recipe cr
+         JOIN ingredient i ON i.recipe_id = cr.recipe_id`
+      )
+      .all() as { name_key: string; unit_key: string }[];
+    const activeSet = new Set(activeKeys.map((k) => `${k.name_key} ${k.unit_key}`));
+    const allChecks = db
+      .prepare('SELECT name_key, unit_key FROM shopping_cart_check')
+      .all() as { name_key: string; unit_key: string }[];
+    const del = db.prepare(
+      'DELETE FROM shopping_cart_check WHERE name_key = ? AND unit_key = ?'
+    );
+    for (const c of allChecks) {
+      if (!activeSet.has(`${c.name_key} ${c.unit_key}`)) {
+        del.run(c.name_key, c.unit_key);
+      }
+    }
+  });
+  tx();
 }
 
 export function clearCart(_db: Database.Database): void {
diff --git a/tests/integration/shopping-repository.test.ts b/tests/integration/shopping-repository.test.ts
index 8453e5f..dd0469e 100644
--- a/tests/integration/shopping-repository.test.ts
+++ b/tests/integration/shopping-repository.test.ts
@@ -6,7 +6,8 @@ import {
   removeRecipeFromCart,
   listShoppingList,
   setCartServings,
-  toggleCheck
+  toggleCheck,
+  clearCheckedItems
 } from '../../src/lib/server/shopping/repository';
 import type { Recipe } from '../../src/lib/types';
 
@@ -231,3 +232,56 @@ describe('toggleCheck', () => {
     expect(rows[0].total_quantity).toBe(200);
   });
 });
+
+describe('clearCheckedItems', () => {
+  it('removes recipes where ALL rows are checked', () => {
+    const db = openInMemoryForTest();
+    const a = insertRecipe(db, recipe({
+      title: 'A',
+      ingredients: [{ position: 1, quantity: 1, unit: 'Stk', name: 'Apfel', note: null, raw_text: '', section_heading: null }]
+    }));
+    const b = insertRecipe(db, recipe({
+      title: 'B',
+      ingredients: [
+        { position: 1, quantity: 1, unit: 'Stk', name: 'Birne', note: null, raw_text: '', section_heading: null },
+        { position: 2, quantity: 1, unit: 'Stk', name: 'Salz', note: null, raw_text: '', section_heading: null }
+      ]
+    }));
+    addRecipeToCart(db, a, null);
+    addRecipeToCart(db, b, null);
+    toggleCheck(db, 'apfel', 'stk', true);
+    toggleCheck(db, 'birne', 'stk', true);
+    // Salz aus B noch nicht abgehakt → B bleibt, A fliegt
+    clearCheckedItems(db);
+    const snap = listShoppingList(db);
+    expect(snap.recipes.map((r) => r.recipe_id)).toEqual([b]);
+    // Birne-Check bleibt, weil B noch im Cart und Birne noch aktiv
+    const birneRow = snap.rows.find((r) => r.name_key === 'birne');
+    expect(birneRow?.checked).toBe(1);
+  });
+
+  it('purges orphan checks that no longer map to any cart recipe', () => {
+    const db = openInMemoryForTest();
+    const id = insertRecipe(db, recipe({
+      ingredients: [{ position: 1, quantity: 1, unit: 'Stk', name: 'Apfel', note: null, raw_text: '', section_heading: null }]
+    }));
+    addRecipeToCart(db, id, null);
+    toggleCheck(db, 'apfel', 'stk', true);
+    clearCheckedItems(db);
+    // Apfel-Check haengt jetzt an nichts mehr → muss aus der Tabelle raus sein
+    const row = db
+      .prepare('SELECT * FROM shopping_cart_check WHERE name_key = ?')
+      .get('apfel');
+    expect(row).toBeUndefined();
+  });
+
+  it('is a no-op when nothing is checked', () => {
+    const db = openInMemoryForTest();
+    const id = insertRecipe(db, recipe({
+      ingredients: [{ position: 1, quantity: 1, unit: 'Stk', name: 'Apfel', note: null, raw_text: '', section_heading: null }]
+    }));
+    addRecipeToCart(db, id, null);
+    clearCheckedItems(db);
+    expect(listShoppingList(db).recipes).toHaveLength(1);
+  });
+});