diff --git a/src/modules/clipboard/domain/tests/clipboardPayloadExt.test.ts b/src/modules/clipboard/domain/tests/clipboardPayloadExt.test.ts
new file mode 100644
index 000000000..1d1be466f
--- /dev/null
+++ b/src/modules/clipboard/domain/tests/clipboardPayloadExt.test.ts
@@ -0,0 +1,116 @@
+import { afterEach, describe, expect, it, vi } from 'vitest'
+
+import { ClipboardPayloadExt } from '~/modules/clipboard/domain/clipboardPayloadExt'
+import { createItem, type Item } from '~/modules/diet/item/schema/itemSchema'
+import { createMacroNutrients } from '~/modules/diet/macro-nutrients/domain/macroNutrients'
+import { createNewMeal, promoteMeal } from '~/modules/diet/meal/domain/meal'
+import {
+  createNewRecipe,
+  promoteRecipe,
+} from '~/modules/diet/recipe/domain/recipe'
+
+const createFoodItem = (id: number, name: string, quantity: number): Item =>
+  createItem({
+    id,
+    name,
+    quantity,
+    reference: {
+      type: 'food',
+      id: id * 10,
+      macros: createMacroNutrients({
+        proteinInGrams: 10,
+        carbsInGrams: 20,
+        fatInGrams: 5,
+      }),
+    },
+  })
+
+const expectRegeneratedId = (
+  actualId: number,
+  originalId: number,
+  randomValue: number,
+): void => {
+  expect(actualId).toBe(Math.round(randomValue * 1000000))
+  expect(actualId).not.toBe(originalId)
+  expect(Number.isInteger(actualId)).toBe(true)
+}
+
+describe('ClipboardPayloadExt', () => {
+  afterEach(() => {
+    vi.restoreAllMocks()
+  })
+
+  describe('extractItems', () => {
+    it('extracts a single item and regenerates its id while preserving content', () => {
+      const payload = createFoodItem(10, 'Banana', 150)
+
+      vi.spyOn(Math, 'random').mockReturnValueOnce(0.123456)
+
+      const extractedItems = ClipboardPayloadExt.extractItems(payload)
+
+      expect(extractedItems).toHaveLength(1)
+      expectRegeneratedId(extractedItems[0]!.id, payload.id, 0.123456)
+      expect(extractedItems[0]).toEqual({
+        ...payload,
+        id: 123456,
+      })
+      expect(payload.id).toBe(10)
+    })
+
+    it('extracts meal items and regenerates unique ids for every item', () => {
+      const items = [
+        createFoodItem(10, 'Rice', 100),
+        createFoodItem(20, 'Beans', 80),
+      ]
+      const payload = promoteMeal(createNewMeal({ name: 'Lunch', items }), {
+        id: 1,
+      })
+
+      vi.spyOn(Math, 'random')
+        .mockReturnValueOnce(0.111111)
+        .mockReturnValueOnce(0.222222)
+
+      const extractedItems = ClipboardPayloadExt.extractItems(payload)
+
+      expect(extractedItems).toHaveLength(2)
+      expectRegeneratedId(extractedItems[0]!.id, items[0]!.id, 0.111111)
+      expectRegeneratedId(extractedItems[1]!.id, items[1]!.id, 0.222222)
+      expect(extractedItems).toEqual([
+        { ...items[0], id: 111111 },
+        { ...items[1], id: 222222 },
+      ])
+      expect(payload.items).toEqual(items)
+    })
+
+    it('extracts recipe items and regenerates unique ids for every item', () => {
+      const items = [
+        createFoodItem(30, 'Tomato', 120),
+        createFoodItem(40, 'Cheese', 50),
+      ]
+      const payload = promoteRecipe(
+        createNewRecipe({
+          name: 'Salad',
+          user_id: 'user-1',
+          items,
+          prepared_multiplier: 1.5,
+        }),
+        { id: 2 },
+      )
+
+      vi.spyOn(Math, 'random')
+        .mockReturnValueOnce(0.333333)
+        .mockReturnValueOnce(0.444444)
+
+      const extractedItems = ClipboardPayloadExt.extractItems(payload)
+
+      expect(extractedItems).toHaveLength(2)
+      expectRegeneratedId(extractedItems[0]!.id, items[0]!.id, 0.333333)
+      expectRegeneratedId(extractedItems[1]!.id, items[1]!.id, 0.444444)
+      expect(extractedItems).toEqual([
+        { ...items[0], id: 333333 },
+        { ...items[1], id: 444444 },
+      ])
+      expect(payload.items).toEqual(items)
+    })
+  })
+})