diff --git a/cli/node/src/backend/platform.ts b/cli/node/src/backend/platform.ts
index 57eb51dde..49906b8bd 100644
--- a/cli/node/src/backend/platform.ts
+++ b/cli/node/src/backend/platform.ts
@@ -316,16 +316,18 @@ export class PlatformBackend implements Backend {
 		if (entities.length === 0) {
 			throw new Error("At least one entity ID is required for deleteEntities.");
 		}
-		// Delete each provided entity via the v2 path-based endpoint
-		let result: Record<string, unknown> = {};
+		// Delete each provided entity via the v2 path-based endpoint. Key each
+		// response by entity type so a multi-entity delete (e.g. --user-id and
+		// --agent-id together) doesn't discard everything but the last result.
+		const results: Record<string, unknown> = {};
 		for (const [entityType, entityId] of entities) {
-			result = (await this._request(
+			results[entityType] = (await this._request(
 				"DELETE",
 				`/v2/entities/${entityType}/${entityId}/`,
 				{ params: { source: "CLI" } },
 			)) as Record<string, unknown>;
 		}
-		return result;
+		return results;
 	}
 
 	async ping(): Promise<Record<string, unknown>> {
diff --git a/cli/node/tests/platform-backend.test.ts b/cli/node/tests/platform-backend.test.ts
new file mode 100644
index 000000000..1857f52bf
--- /dev/null
+++ b/cli/node/tests/platform-backend.test.ts
@@ -0,0 +1,52 @@
+/**
+ * Tests for the Platform backend (mem0 Platform API client).
+ */
+
+import { describe, it, expect, vi } from "vitest";
+import { PlatformBackend } from "../src/backend/platform.js";
+import { createDefaultConfig } from "../src/config.js";
+
+function makeBackend(): PlatformBackend {
+  // apiKey/baseUrl only build request headers; every test spies on _request,
+  // so no real network calls are made.
+  return new PlatformBackend(createDefaultConfig().platform);
+}
+
+describe("deleteEntities", () => {
+  it("returns all results keyed by entity type for a multi-entity delete", async () => {
+    const backend = makeBackend();
+    const responses: Record<string, unknown> = {
+      "/v2/entities/user/alice/": { message: "user deleted" },
+      "/v2/entities/agent/bob/": { message: "agent deleted" },
+    };
+    const spy = vi
+      // biome-ignore lint/suspicious/noExplicitAny: spying on a private method
+      .spyOn(backend as any, "_request")
+      .mockImplementation(async (_method: string, path: string) => responses[path]);
+
+    const result = await backend.deleteEntities({ userId: "alice", agentId: "bob" });
+
+    // Regression: previously only the last entity's response survived.
+    expect(result).toEqual({
+      user: { message: "user deleted" },
+      agent: { message: "agent deleted" },
+    });
+    expect(spy).toHaveBeenCalledTimes(2);
+  });
+
+  it("keys a single-entity delete by its type", async () => {
+    const backend = makeBackend();
+    // biome-ignore lint/suspicious/noExplicitAny: spying on a private method
+    vi.spyOn(backend as any, "_request").mockResolvedValue({ message: "user deleted" });
+
+    const result = await backend.deleteEntities({ userId: "alice" });
+    expect(result).toEqual({ user: { message: "user deleted" } });
+  });
+
+  it("throws when no entity id is provided", async () => {
+    const backend = makeBackend();
+    await expect(backend.deleteEntities({})).rejects.toThrow(
+      "At least one entity ID is required",
+    );
+  });
+});