fix: delete_all now drains all pages, not just the first batch (close… (#4872)

Co-authored-by: kartik-mem0 <kartik.labhshetwar@mem0.ai>

mem0-ts/src/oss/src/memory/index.ts

@@ -105,6 +105,10 @@ const ENTITY_PARAMS = [
 // in both casings (the default store promotes camelCase on read); actor_id has no camelCase alias.
 const IDENTITY_KEYS = [...ENTITY_PARAMS, "actor_id"];
 
+// Batch size for deleteAll pagination. Larger than most vector store default
+// page limits (~100) to minimize roundtrips while bounded to avoid memory pressure.
+const DELETE_ALL_BATCH_SIZE = 1000;
+
 /**
  * Validates that no top-level entity parameters are passed in config.
  * @throws Error if entity params are found at top level
@@ -1727,18 +1731,39 @@ export class Memory {
       );
     }
 
-    const [memories] = await this.vectorStore.list(filters);
-    for (const memory of memories) {
-      await this.deleteMemory(memory.id);
+    let deletedCount = 0;
+    const seenBatches = new Set<string>();
+
+    while (true) {
+      const [batch] = await this.vectorStore.list(
+        filters,
+        DELETE_ALL_BATCH_SIZE,
+      );
+      if (!batch.length) {
+        break;
+      }
+      const batchKey = batch
+        .map((memory) => String(memory.id))
+        .sort()
+        .join(",");
+      if (seenBatches.has(batchKey)) {
+        logger.warn("Stopping deleteAll after a repeated memory batch");
+        break;
+      }
+      seenBatches.add(batchKey);
+      for (const memory of batch) {
+        await this.deleteMemory(memory.id);
+      }
+      deletedCount += batch.length;
     }
 
     const result = { message: "Memories deleted successfully!" };
-    if (memories.length > 0) {
+    if (deletedCount > 0) {
       await this._displayDecayUsageNotice({
         triggerFunction: "delete_all",
         triggerSource: "delete_all",
         triggerReason: "bulk_delete",
-        deletedCount: memories.length,
+        deletedCount,
       });
     } else {
       await this._displayFirstRunNotice("delete_all");

mem0-ts/src/oss/tests/memory.crud.test.ts

@@ -649,6 +649,66 @@ describe("Memory - deleteAll()", () => {
       "At least one filter is required to delete all memories",
     );
   });
+
+  test("deletes past the vector store default page limit", async () => {
+    const mem = createMemory();
+    const internals = mem as any;
+    await internals._ensureInitialized();
+    const pagedUserId = `deleteall_paged_${Date.now()}`;
+    const total = 150;
+
+    await internals.vectorStore.insert(
+      Array.from({ length: total }, () => new Array(1536).fill(0.1)),
+      Array.from({ length: total }, (_, index) => `paged-${index}`),
+      Array.from({ length: total }, (_, index) => ({
+        data: `Fact ${index}`,
+        hash: `hash-${index}`,
+        user_id: pagedUserId,
+        createdAt: new Date().toISOString(),
+      })),
+    );
+
+    const [before] = await internals.vectorStore.list(
+      { user_id: pagedUserId },
+      total * 2,
+    );
+    expect(before).toHaveLength(total);
+
+    const result = await mem.deleteAll({ userId: pagedUserId });
+    expect(result.message).toBe("Memories deleted successfully!");
+
+    const [after] = await internals.vectorStore.list(
+      { user_id: pagedUserId },
+      total * 2,
+    );
+    expect(after).toHaveLength(0);
+  }, 60000);
+
+  test("stops when the vector store keeps returning the same batch", async () => {
+    const mem = createMemory();
+    const internals = mem as any;
+    await internals._ensureInitialized();
+    const stale = [
+      { id: "stale-1", payload: { data: "x", user_id: "u1" } },
+      { id: "stale-2", payload: { data: "x", user_id: "u1" } },
+    ];
+    const listSpy = jest
+      .spyOn(internals.vectorStore, "list")
+      .mockResolvedValueOnce([stale, stale.length])
+      .mockResolvedValueOnce([stale, stale.length])
+      .mockImplementation(async () => {
+        throw new Error("deleteAll should have stopped after a repeated batch");
+      });
+    const deleteSpy = jest
+      .spyOn(internals, "deleteMemory")
+      .mockResolvedValue("stale-1");
+
+    const result = await mem.deleteAll({ userId: "u1" });
+
+    expect(result.message).toBe("Memories deleted successfully!");
+    expect(listSpy).toHaveBeenCalledTimes(2);
+    expect(deleteSpy).toHaveBeenCalledTimes(2);
+  });
 });
 
 // ─── getAll() ────────────────────────────────────────────

mem0-ts/src/oss/tests/memory.validation.test.ts

@@ -362,7 +362,10 @@ describe("Memory Input Validation", () => {
 
       await memory.deleteAll({ userId: "  alice  " });
 
-      expect(listSpy).toHaveBeenCalledWith({ user_id: "alice" });
+      expect(listSpy).toHaveBeenCalledWith(
+        { user_id: "alice" },
+        expect.any(Number),
+      );
     });
   });
 });

mem0-ts/src/oss/tests/vector-stores-compat.test.ts

@@ -5177,20 +5177,22 @@ describe("Memory class – backward compat with all providers", () => {
         updated_at: new Date().toISOString(),
       },
     });
-    mockVStore.list.mockResolvedValue([
-      [
-        {
-          id: memoryId,
-          payload: {
-            memory: "test",
-            hash: "h",
-            created_at: new Date().toISOString(),
-            updated_at: new Date().toISOString(),
+    mockVStore.list
+      .mockResolvedValueOnce([
+        [
+          {
+            id: memoryId,
+            payload: {
+              memory: "test",
+              hash: "h",
+              created_at: new Date().toISOString(),
+              updated_at: new Date().toISOString(),
+            },
           },
-        },
-      ],
-      1,
-    ]);
+        ],
+        1,
+      ])
+      .mockResolvedValue([[], 0]);
     mockVectorStoreFactory.create.mockReturnValue(mockVStore);
 
     const mem = new MemoryClass({