fix (telemetry): stitch oss and platform telemetry identities for python and typescript sdk

Co-authored-by: Younes Slaoui <younes.slaoui@mem0.ai>

mem0-ts/src/client/config.ts

@@ -0,0 +1,165 @@
+/**
+ * Best-effort read/write of ~/.mem0/config.json from the TS SDK.
+ *
+ * Used to stitch PostHog identities: SDKs and CLIs persist anonymous
+ * distinct_id values here, and the TS MemoryClient reads those on init to
+ * fire $identify and merge them into the email identity.
+ *
+ * Node-only. Browsers (no `process.versions.node`) no-op.
+ */
+
+export interface Mem0AnonIds {
+  oss?: string;
+  cli?: string;
+  aliasedPairs: string[];
+}
+
+interface NodeFs {
+  fs: typeof import("fs");
+  path: typeof import("path");
+  crypto: typeof import("crypto");
+  configPath: string;
+}
+
+async function getNodeFs(): Promise<NodeFs | null> {
+  if (typeof process === "undefined" || !process.versions?.node) return null;
+  try {
+    const [fs, path, os, crypto] = await Promise.all([
+      import("fs"),
+      import("path"),
+      import("os"),
+      import("crypto"),
+    ]);
+    const fsMod = (fs as any).default ?? fs;
+    const pathMod = (path as any).default ?? path;
+    const osMod = (os as any).default ?? os;
+    const cryptoMod = (crypto as any).default ?? crypto;
+    const dir = process.env.MEM0_DIR || pathMod.join(osMod.homedir(), ".mem0");
+    return {
+      fs: fsMod,
+      path: pathMod,
+      crypto: cryptoMod,
+      configPath: pathMod.join(dir, "config.json"),
+    };
+  } catch {
+    return null;
+  }
+}
+
+function loadConfig(node: NodeFs): Record<string, any> | null {
+  try {
+    if (!node.fs.existsSync(node.configPath)) return null;
+    const parsed = JSON.parse(node.fs.readFileSync(node.configPath, "utf8"));
+    return parsed && typeof parsed === "object" ? parsed : null;
+  } catch {
+    return null;
+  }
+}
+
+function writeConfig(node: NodeFs, config: Record<string, any>): void {
+  node.fs.mkdirSync(node.path.dirname(node.configPath), { recursive: true });
+  node.fs.writeFileSync(node.configPath, JSON.stringify(config, null, 4));
+}
+
+function aliasPairMarker(node: NodeFs, anonId: string, email: string): string {
+  return node.crypto
+    .createHash("sha256")
+    .update(`${anonId}\0${email}`, "utf8")
+    .digest("hex");
+}
+
+function randomUserId(node: NodeFs): string {
+  if (typeof node.crypto.randomUUID === "function") {
+    return node.crypto.randomUUID();
+  }
+  return (
+    Math.random().toString(36).substring(2, 15) +
+    Math.random().toString(36).substring(2, 15)
+  );
+}
+
+export async function getOrCreateMem0UserId(): Promise<string | null> {
+  const node = await getNodeFs();
+  if (!node) return null;
+  try {
+    const config = loadConfig(node) ?? {};
+    if (typeof config.user_id === "string" && config.user_id) {
+      return config.user_id;
+    }
+    const userId = randomUserId(node);
+    config.user_id = userId;
+    writeConfig(node, config);
+    return userId;
+  } catch {
+    return null;
+  }
+}
+
+export async function readMem0AnonIds(): Promise<Mem0AnonIds | null> {
+  const node = await getNodeFs();
+  if (!node) return null;
+  const config = loadConfig(node);
+  if (!config) return null;
+  const telemetry =
+    config.telemetry && typeof config.telemetry === "object"
+      ? config.telemetry
+      : {};
+  return {
+    oss: typeof config.user_id === "string" ? config.user_id : undefined,
+    cli:
+      typeof telemetry.anonymous_id === "string"
+        ? telemetry.anonymous_id
+        : undefined,
+    aliasedPairs: Array.isArray(telemetry.aliased_pairs)
+      ? telemetry.aliased_pairs.filter(
+          (item: unknown) => typeof item === "string",
+        )
+      : [],
+  };
+}
+
+export async function isMem0Aliased(
+  anonId: string,
+  email: string,
+): Promise<boolean> {
+  if (!anonId || !email) return false;
+  const node = await getNodeFs();
+  if (!node) return false;
+  const config = loadConfig(node);
+  if (!config) return false;
+  const telemetry =
+    config.telemetry && typeof config.telemetry === "object"
+      ? config.telemetry
+      : {};
+  const aliasedPairs = Array.isArray(telemetry.aliased_pairs)
+    ? telemetry.aliased_pairs
+    : [];
+  return aliasedPairs.includes(aliasPairMarker(node, anonId, email));
+}
+
+export async function markMem0Aliased(
+  anonId: string,
+  email: string,
+): Promise<void> {
+  const node = await getNodeFs();
+  if (!node) return;
+  try {
+    const config = loadConfig(node) ?? {};
+    const telemetry =
+      config.telemetry && typeof config.telemetry === "object"
+        ? config.telemetry
+        : {};
+    const aliasedPairs = Array.isArray(telemetry.aliased_pairs)
+      ? telemetry.aliased_pairs
+      : [];
+    const marker = aliasPairMarker(node, anonId, email);
+    if (!aliasedPairs.includes(marker)) {
+      aliasedPairs.push(marker);
+    }
+    telemetry.aliased_pairs = aliasedPairs;
+    config.telemetry = telemetry;
+    writeConfig(node, config);
+  } catch {
+    // Best-effort: read-only filesystems and unwritable paths just skip.
+  }
+}

mem0-ts/src/client/mem0.ts

@@ -20,7 +20,18 @@ import {
   CreateMemoryExportPayload,
   GetMemoryExportPayload,
 } from "./mem0.types";
-import { captureClientEvent, generateHash } from "./telemetry";
+import {
+  captureClientEvent,
+  generateHash,
+  isTelemetryEnabled,
+  telemetry,
+} from "./telemetry";
+import {
+  getOrCreateMem0UserId,
+  isMem0Aliased,
+  markMem0Aliased,
+  readMem0AnonIds,
+} from "./config";
 import { camelToSnake, camelToSnakeKeys, snakeToCamelKeys } from "./utils";
 import { createExceptionFromResponse, MemoryError } from "../common/exceptions";
 
@@ -118,6 +129,8 @@ export default class MemoryClient {
         this.telemetryId = generateHash(this.apiKey);
       }
 
+      await this._maybeAliasAnonToEmail();
+
       captureClientEvent("init", this, {
         client_type: "MemoryClient",
       }).catch((error: any) => {
@@ -132,6 +145,30 @@ export default class MemoryClient {
     }
   }
 
+  private async _maybeAliasAnonToEmail(): Promise<void> {
+    if (!isTelemetryEnabled()) return;
+    try {
+      const email = this.telemetryId;
+      if (!email || !email.includes("@")) return;
+      const sharedAnonId = await getOrCreateMem0UserId();
+      const anonIds = await readMem0AnonIds();
+      if (!anonIds && !sharedAnonId) return;
+      const candidates = [anonIds?.oss || sharedAnonId, anonIds?.cli].filter(
+        (id): id is string => !!id && id !== email,
+      );
+      const seen = new Set<string>();
+      for (const anonId of candidates) {
+        if (seen.has(anonId) || (await isMem0Aliased(anonId, email))) continue;
+        seen.add(anonId);
+        if (await telemetry.captureIdentify(anonId, email)) {
+          await markMem0Aliased(anonId, email);
+        }
+      }
+    } catch (error: any) {
+      console.error("Failed to alias telemetry identity:", error);
+    }
+  }
+
   private _captureEvent(methodName: string, args: any[]) {
     captureClientEvent(methodName, this, {
       success: true,

mem0-ts/src/client/telemetry.ts

@@ -32,8 +32,12 @@ class UnifiedTelemetry implements TelemetryClient {
     this.host = host;
   }
 
-  async captureEvent(distinctId: string, eventName: string, properties = {}) {
-    if (!MEM0_TELEMETRY) return;
+  async captureEvent(
+    distinctId: string,
+    eventName: string,
+    properties = {},
+  ): Promise<boolean> {
+    if (!MEM0_TELEMETRY) return false;
 
     const eventProperties = {
       client_version: version,
@@ -61,9 +65,50 @@ class UnifiedTelemetry implements TelemetryClient {
 
       if (!response.ok) {
         console.error("Telemetry event capture failed:", await response.text());
+        return false;
       }
+      return true;
     } catch (error) {
       console.error("Telemetry event capture failed:", error);
+      return false;
+    }
+  }
+
+  async captureIdentify(anonId: string, email: string): Promise<boolean> {
+    if (!MEM0_TELEMETRY) return false;
+    if (!anonId || !email || anonId === email) return false;
+
+    const payload = {
+      api_key: this.apiKey,
+      distinct_id: email,
+      event: "$identify",
+      properties: {
+        $anon_distinct_id: anonId,
+        client_source: "typescript",
+        $lib: "posthog-node",
+      },
+    };
+
+    try {
+      const response = await fetch(this.host, {
+        method: "POST",
+        headers: {
+          "Content-Type": "application/json",
+        },
+        body: JSON.stringify(payload),
+      });
+
+      if (!response.ok) {
+        console.error(
+          "Telemetry identify capture failed:",
+          await response.text(),
+        );
+        return false;
+      }
+      return true;
+    } catch (error) {
+      console.error("Telemetry identify capture failed:", error);
+      return false;
     }
   }
 
@@ -72,6 +117,10 @@ class UnifiedTelemetry implements TelemetryClient {
   }
 }
 
+function isTelemetryEnabled(): boolean {
+  return MEM0_TELEMETRY;
+}
+
 const telemetry = new UnifiedTelemetry(POSTHOG_API_KEY, POSTHOG_HOST);
 
 async function captureClientEvent(
@@ -101,4 +150,4 @@ async function captureClientEvent(
   );
 }
 
-export { telemetry, captureClientEvent, generateHash };
+export { telemetry, captureClientEvent, generateHash, isTelemetryEnabled };

mem0-ts/src/client/telemetry.types.ts

@@ -3,7 +3,7 @@ export interface TelemetryClient {
     distinctId: string,
     eventName: string,
     properties?: Record<string, any>,
-  ): Promise<void>;
+  ): Promise<boolean>;
   shutdown(): Promise<void>;
 }
 

mem0-ts/src/client/tests/telemetry-aliasing.test.ts

@@ -0,0 +1,410 @@
+/**
+ * Tests for PostHog identity stitching in the TS MemoryClient.
+ *
+ * Covers $identify firing, idempotency via pair markers, and the node/browser
+ * gate. Mocks fs and fetch; never touches the real ~/.mem0/config.json.
+ */
+import * as fs from "fs";
+import * as os from "os";
+import * as path from "path";
+import { MemoryClient } from "../mem0";
+import { telemetry } from "../telemetry";
+import {
+  getOrCreateMem0UserId,
+  isMem0Aliased,
+  markMem0Aliased,
+  readMem0AnonIds,
+} from "../config";
+import { TEST_API_KEY } from "./helpers";
+import { setupMockFetch, installConsoleSuppression } from "./setup";
+
+installConsoleSuppression();
+
+function setupMockFetchWithPostHog(): jest.Mock {
+  return setupMockFetch(
+    new Map([["us.i.posthog.com", { status: 200, body: "ok" }]]),
+  );
+}
+
+// ─── config.ts (node-only fs read/write) ──────────────────────
+
+describe("config.ts — readMem0AnonIds / markMem0Aliased", () => {
+  let tmpHome: string;
+  const originalMem0Dir = process.env.MEM0_DIR;
+
+  beforeEach(() => {
+    tmpHome = fs.mkdtempSync(path.join(os.tmpdir(), "mem0-ts-test-"));
+    process.env.MEM0_DIR = tmpHome;
+  });
+
+  afterEach(() => {
+    if (fs.existsSync(tmpHome)) {
+      fs.rmSync(tmpHome, { recursive: true, force: true });
+    }
+    if (originalMem0Dir === undefined) {
+      delete process.env.MEM0_DIR;
+    } else {
+      process.env.MEM0_DIR = originalMem0Dir;
+    }
+  });
+
+  test("returns null when config file does not exist", async () => {
+    expect(await readMem0AnonIds()).toBeNull();
+  });
+
+  test("reads OSS user_id only", async () => {
+    fs.writeFileSync(
+      path.join(tmpHome, "config.json"),
+      JSON.stringify({ user_id: "oss-uuid" }),
+    );
+    const ids = await readMem0AnonIds();
+    expect(ids).toEqual({
+      oss: "oss-uuid",
+      cli: undefined,
+      aliasedPairs: [],
+    });
+  });
+
+  test("reads CLI anonymous_id and aliased_pairs", async () => {
+    fs.writeFileSync(
+      path.join(tmpHome, "config.json"),
+      JSON.stringify({
+        telemetry: { anonymous_id: "cli-anon", aliased_pairs: ["pair-marker"] },
+      }),
+    );
+    const ids = await readMem0AnonIds();
+    expect(ids).toEqual({
+      oss: undefined,
+      cli: "cli-anon",
+      aliasedPairs: ["pair-marker"],
+    });
+  });
+
+  test("getOrCreateMem0UserId creates and reuses shared SDK user_id", async () => {
+    const first = await getOrCreateMem0UserId();
+    const second = await getOrCreateMem0UserId();
+    expect(first).toBeTruthy();
+    expect(second).toBe(first);
+    const written = JSON.parse(
+      fs.readFileSync(path.join(tmpHome, "config.json"), "utf8"),
+    );
+    expect(written.user_id).toBe(first);
+  });
+
+  test("returns null on malformed JSON", async () => {
+    fs.writeFileSync(path.join(tmpHome, "config.json"), "{not json");
+    expect(await readMem0AnonIds()).toBeNull();
+  });
+
+  test("markMem0Aliased preserves other fields", async () => {
+    fs.writeFileSync(
+      path.join(tmpHome, "config.json"),
+      JSON.stringify({
+        user_id: "oss-uuid",
+        telemetry: { anonymous_id: "cli-anon" },
+      }),
+    );
+    await markMem0Aliased("oss-uuid", "user@example.com");
+    const written = JSON.parse(
+      fs.readFileSync(path.join(tmpHome, "config.json"), "utf8"),
+    );
+    expect(written.user_id).toBe("oss-uuid");
+    expect(written.telemetry.anonymous_id).toBe("cli-anon");
+    expect(written.telemetry.aliased_pairs).toHaveLength(1);
+    expect(await isMem0Aliased("oss-uuid", "user@example.com")).toBe(true);
+  });
+
+  test("markMem0Aliased creates telemetry section when missing", async () => {
+    fs.writeFileSync(
+      path.join(tmpHome, "config.json"),
+      JSON.stringify({ user_id: "oss-uuid" }),
+    );
+    await markMem0Aliased("oss-uuid", "user@example.com");
+    const written = JSON.parse(
+      fs.readFileSync(path.join(tmpHome, "config.json"), "utf8"),
+    );
+    expect(written.telemetry.aliased_pairs).toHaveLength(1);
+  });
+
+  test("markMem0Aliased tracks each pair independently", async () => {
+    fs.writeFileSync(
+      path.join(tmpHome, "config.json"),
+      JSON.stringify({ user_id: "oss-uuid" }),
+    );
+    await markMem0Aliased("oss-uuid", "user@example.com");
+    expect(await isMem0Aliased("oss-uuid", "user@example.com")).toBe(true);
+    expect(await isMem0Aliased("other-uuid", "user@example.com")).toBe(false);
+    expect(await isMem0Aliased("oss-uuid", "other@example.com")).toBe(false);
+  });
+
+  test("markMem0Aliased does not throw when target dir is unwritable", async () => {
+    // Point at a path that cannot be written to (a file-as-dir collision).
+    fs.writeFileSync(path.join(tmpHome, "blocker"), "x");
+    process.env.MEM0_DIR = path.join(tmpHome, "blocker"); // file used as dir
+    await expect(
+      markMem0Aliased("oss-uuid", "user@example.com"),
+    ).resolves.toBeUndefined();
+  });
+});
+
+// ─── telemetry.captureIdentify ───────────────────────────────
+
+describe("telemetry.captureIdentify", () => {
+  test("fires $identify with $anon_distinct_id", async () => {
+    const fetchMock = jest.fn(async () => ({
+      ok: true,
+      status: 200,
+      text: async () => "ok",
+    })) as unknown as typeof fetch;
+    global.fetch = fetchMock as any;
+
+    await telemetry.captureIdentify("anon-uuid", "user@example.com");
+
+    expect(fetchMock).toHaveBeenCalledTimes(1);
+    const [, init] = (fetchMock as jest.Mock).mock.calls[0];
+    const payload = JSON.parse(init.body);
+    expect(payload.event).toBe("$identify");
+    expect(payload.distinct_id).toBe("user@example.com");
+    expect(payload.properties.$anon_distinct_id).toBe("anon-uuid");
+    expect(payload.properties.$process_person_profile).toBeUndefined();
+  });
+
+  test("skips when anon equals email", async () => {
+    const fetchMock = jest.fn() as unknown as typeof fetch;
+    global.fetch = fetchMock as any;
+    await telemetry.captureIdentify("user@example.com", "user@example.com");
+    expect(fetchMock).not.toHaveBeenCalled();
+  });
+
+  test("skips when either input is empty", async () => {
+    const fetchMock = jest.fn() as unknown as typeof fetch;
+    global.fetch = fetchMock as any;
+    await telemetry.captureIdentify("", "user@example.com");
+    await telemetry.captureIdentify("anon", "");
+    expect(fetchMock).not.toHaveBeenCalled();
+  });
+});
+
+// ─── MemoryClient init aliasing ──────────────────────────────
+
+describe("MemoryClient — _maybeAliasAnonToEmail", () => {
+  let tmpHome: string;
+  const originalMem0Dir = process.env.MEM0_DIR;
+
+  beforeEach(() => {
+    tmpHome = fs.mkdtempSync(path.join(os.tmpdir(), "mem0-ts-init-"));
+    process.env.MEM0_DIR = tmpHome;
+  });
+
+  afterEach(() => {
+    if (fs.existsSync(tmpHome)) {
+      fs.rmSync(tmpHome, { recursive: true, force: true });
+    }
+    if (originalMem0Dir === undefined) {
+      delete process.env.MEM0_DIR;
+    } else {
+      process.env.MEM0_DIR = originalMem0Dir;
+    }
+  });
+
+  // Construct a non-initialised client so we can call _maybeAliasAnonToEmail
+  // in isolation (the real constructor's _initializeClient also fires it).
+  function makeStubClient(telemetryId: string): MemoryClient {
+    const client = Object.create(MemoryClient.prototype) as MemoryClient;
+    (client as any).apiKey = TEST_API_KEY;
+    (client as any).host = "https://api.mem0.ai";
+    (client as any).telemetryId = telemetryId;
+    return client;
+  }
+
+  test("fires $identify on first init and persists pair marker", async () => {
+    fs.writeFileSync(
+      path.join(tmpHome, "config.json"),
+      JSON.stringify({ user_id: "oss-uuid" }),
+    );
+    const fetchMock = setupMockFetchWithPostHog();
+
+    const client = makeStubClient("test@example.com");
+    await (client as any)._maybeAliasAnonToEmail();
+
+    const identifyCalls = (fetchMock.mock.calls as any[]).filter(
+      ([, init]: [string, RequestInit]) => {
+        if (!init?.body) return false;
+        return JSON.parse(init.body as string).event === "$identify";
+      },
+    );
+    expect(identifyCalls.length).toBe(1);
+    const body = JSON.parse(identifyCalls[0][1].body);
+    expect(body.distinct_id).toBe("test@example.com");
+    expect(body.properties.$anon_distinct_id).toBe("oss-uuid");
+
+    const written = JSON.parse(
+      fs.readFileSync(path.join(tmpHome, "config.json"), "utf8"),
+    );
+    expect(written.telemetry.aliased_pairs).toHaveLength(1);
+  });
+
+  test("platform-first init creates shared anon ID and identifies it", async () => {
+    const fetchMock = setupMockFetchWithPostHog();
+
+    const client = makeStubClient("test@example.com");
+    await (client as any)._maybeAliasAnonToEmail();
+
+    const written = JSON.parse(
+      fs.readFileSync(path.join(tmpHome, "config.json"), "utf8"),
+    );
+    expect(written.user_id).toBeTruthy();
+    expect(written.telemetry.aliased_pairs).toHaveLength(1);
+
+    const identifyCalls = (fetchMock.mock.calls as any[]).filter(
+      ([, init]: [string, RequestInit]) => {
+        if (!init?.body) return false;
+        return JSON.parse(init.body as string).event === "$identify";
+      },
+    );
+    expect(identifyCalls.length).toBe(1);
+    const body = JSON.parse(identifyCalls[0][1].body);
+    expect(body.distinct_id).toBe("test@example.com");
+    expect(body.properties.$anon_distinct_id).toBe(written.user_id);
+  });
+
+  test("second init does not refire $identify", async () => {
+    fs.writeFileSync(
+      path.join(tmpHome, "config.json"),
+      JSON.stringify({
+        user_id: "oss-uuid",
+        telemetry: {},
+      }),
+    );
+    await markMem0Aliased("oss-uuid", "test@example.com");
+    const fetchMock = setupMockFetchWithPostHog();
+
+    const client = makeStubClient("test@example.com");
+    await (client as any)._maybeAliasAnonToEmail();
+
+    const identifyCalls = (fetchMock.mock.calls as any[]).filter(
+      ([, init]: [string, RequestInit]) => {
+        if (!init?.body) return false;
+        return JSON.parse(init.body as string).event === "$identify";
+      },
+    );
+    expect(identifyCalls.length).toBe(0);
+  });
+
+  test("fires $identify for both OSS and CLI anon ids", async () => {
+    fs.writeFileSync(
+      path.join(tmpHome, "config.json"),
+      JSON.stringify({
+        user_id: "oss-uuid",
+        telemetry: { anonymous_id: "cli-anon" },
+      }),
+    );
+    const fetchMock = setupMockFetchWithPostHog();
+
+    const client = makeStubClient("test@example.com");
+    await (client as any)._maybeAliasAnonToEmail();
+
+    const identifyCalls = (fetchMock.mock.calls as any[]).filter(
+      ([, init]: [string, RequestInit]) => {
+        if (!init?.body) return false;
+        return JSON.parse(init.body as string).event === "$identify";
+      },
+    );
+    expect(identifyCalls.length).toBe(2);
+    const anonIds = identifyCalls.map(
+      (c: [string, RequestInit]) =>
+        JSON.parse(c[1].body as string).properties.$anon_distinct_id,
+    );
+    expect(anonIds).toContain("oss-uuid");
+    expect(anonIds).toContain("cli-anon");
+
+    const written = JSON.parse(
+      fs.readFileSync(path.join(tmpHome, "config.json"), "utf8"),
+    );
+    expect(written.telemetry.aliased_pairs).toHaveLength(2);
+  });
+
+  test("noop when telemetryId is not an email", async () => {
+    fs.writeFileSync(
+      path.join(tmpHome, "config.json"),
+      JSON.stringify({ user_id: "oss-uuid" }),
+    );
+    const fetchMock = setupMockFetch();
+
+    const client = makeStubClient("not-an-email");
+    await (client as any)._maybeAliasAnonToEmail();
+
+    const identifyCalls = (fetchMock.mock.calls as any[]).filter(
+      ([, init]: [string, RequestInit]) => {
+        if (!init?.body) return false;
+        return JSON.parse(init.body as string).event === "$identify";
+      },
+    );
+    expect(identifyCalls.length).toBe(0);
+  });
+
+  test("does not throw when config read fails", async () => {
+    fs.writeFileSync(path.join(tmpHome, "config.json"), "{not json");
+    setupMockFetch();
+
+    const client = makeStubClient("test@example.com");
+    await expect(
+      (client as any)._maybeAliasAnonToEmail(),
+    ).resolves.toBeUndefined();
+  });
+
+  test("noop when telemetry disabled — no fs read, no fs write, no events", async () => {
+    fs.writeFileSync(
+      path.join(tmpHome, "config.json"),
+      JSON.stringify({ user_id: "oss-uuid" }),
+    );
+    const fetchMock = setupMockFetch();
+
+    jest.resetModules();
+    const original = process.env.MEM0_TELEMETRY;
+    process.env.MEM0_TELEMETRY = "false";
+    try {
+      const { MemoryClient: ColdClient } = await import("../mem0");
+      const client = Object.create(ColdClient.prototype);
+      client.apiKey = TEST_API_KEY;
+      client.host = "https://api.mem0.ai";
+      client.telemetryId = "test@example.com";
+      await client._maybeAliasAnonToEmail();
+    } finally {
+      if (original === undefined) delete process.env.MEM0_TELEMETRY;
+      else process.env.MEM0_TELEMETRY = original;
+      jest.resetModules();
+    }
+
+    const identifyCalls = (fetchMock.mock.calls as any[]).filter(
+      ([, init]: [string, RequestInit]) => {
+        if (!init?.body) return false;
+        return JSON.parse(init.body as string).event === "$identify";
+      },
+    );
+    expect(identifyCalls.length).toBe(0);
+
+    const written = JSON.parse(
+      fs.readFileSync(path.join(tmpHome, "config.json"), "utf8"),
+    );
+    expect(written.telemetry?.aliased_pairs).toBeUndefined();
+  });
+});
+
+// ─── Browser env path (no process.versions.node) ─────────────
+
+describe("config.ts in browser-like environment", () => {
+  test("readMem0AnonIds returns null when not Node", async () => {
+    const originalProcess = global.process;
+    // @ts-expect-error force-undefining global to simulate a browser
+    delete global.process;
+    try {
+      jest.resetModules();
+      const { readMem0AnonIds: browserRead } = await import("../config");
+      expect(await browserRead()).toBeNull();
+    } finally {
+      global.process = originalProcess;
+      jest.resetModules();
+    }
+  });
+});

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

@@ -53,6 +53,7 @@ import {
   ScoredResult,
 } from "../utils/scoring";
 import { getDefaultVectorStoreDbPath } from "../utils/sqlite";
+import { getOrCreateMem0UserId } from "../../../client/config";
 
 // Entity params that must be passed via filters - check both snake_case and camelCase
 const ENTITY_PARAMS = [
@@ -466,7 +467,12 @@ export class Memory {
         this.telemetryId === "anonymous" ||
         this.telemetryId === "anonymous-supabase"
       ) {
-        this.telemetryId = await this.vectorStore.getUserId();
+        this.telemetryId =
+          (await getOrCreateMem0UserId()) ||
+          (await this.vectorStore.getUserId());
+        try {
+          await this.vectorStore.setUserId(this.telemetryId);
+        } catch {}
       }
       return this.telemetryId;
     } catch (error) {