fix(cli): persistent anonymous telemetry ID + pass source=CLI in all API calls (#4789)

cli/node/src/telemetry.ts

@@ -9,10 +9,10 @@
  */
 
 import { spawn } from "node:child_process";
-import { createHash } from "node:crypto";
+import { createHash, randomUUID } from "node:crypto";
 import path from "node:path";
 import { fileURLToPath } from "node:url";
-import { CONFIG_FILE, loadConfig } from "./config.js";
+import { CONFIG_FILE, loadConfig, saveConfig } from "./config.js";
 import { CLI_VERSION } from "./version.js";
 
 const POSTHOG_API_KEY = "phc_hgJkUVJFYtmaJqrvf6CYN67TIQ8yhXAkWzUn9AMU4yX";
@@ -29,11 +29,34 @@ function isTelemetryEnabled(): boolean {
 	}
 }
 
+/**
+ * Return a persistent per-machine anonymous ID, generating one if needed.
+ *
+ * Stored in ~/.mem0/config.json under `telemetry.anonymous_id` so that
+ * repeat runs on the same machine share one PostHog identity instead of
+ * collapsing into a single shared fallback string.
+ */
+function getOrCreateAnonymousId(): string {
+	const config = loadConfig();
+	if (config.telemetry.anonymousId) {
+		return config.telemetry.anonymousId;
+	}
+
+	const newId = `cli-anon-${randomUUID().replace(/-/g, "")}`;
+	config.telemetry.anonymousId = newId;
+	try {
+		saveConfig(config);
+	} catch {
+		/* ignore persistence failure — still return the generated ID */
+	}
+	return newId;
+}
+
 /**
  * Return a stable anonymous identifier for the current user.
  *
- * Priority: cached user_email (from /v1/ping/) > MD5(api_key) > fallback.
- * Matches the SDK pattern in mem0-ts/src/client/mem0.ts.
+ * Priority: cached user_email (from /v1/ping/) > MD5(api_key) >
+ * persistent per-machine anonymous ID.
  */
 function getDistinctId(): string {
 	try {
@@ -47,7 +70,11 @@ function getDistinctId(): string {
 	} catch {
 		/* ignore */
 	}
-	return "anonymous-cli";
+	try {
+		return getOrCreateAnonymousId();
+	} catch {
+		return `cli-anon-${randomUUID().replace(/-/g, "")}`;
+	}
 }
 
 /**
@@ -69,6 +96,25 @@ export function captureEvent(
 		const config = loadConfig();
 		const distinctId = preResolvedEmail || getDistinctId();
 
+		// Detect anonymous → identified transition. If a stored anonymous_id
+		// exists and we just resolved to a real identity, fire a one-shot
+		// $identify event so PostHog stitches the pre-signup history onto
+		// the authenticated profile. Clear the stored id so we don't re-alias.
+		let anonIdToAlias: string | null = null;
+		if (
+			distinctId &&
+			!distinctId.startsWith("cli-anon-") &&
+			config.telemetry.anonymousId
+		) {
+			anonIdToAlias = config.telemetry.anonymousId;
+			config.telemetry.anonymousId = "";
+			try {
+				saveConfig(config);
+			} catch {
+				/* ignore — alias may double-fire next run, harmless */
+			}
+		}
+
 		const payload = {
 			api_key: POSTHOG_API_KEY,
 			distinct_id: distinctId,
@@ -92,6 +138,7 @@ export function captureEvent(
 			mem0ApiKey: config.platform.apiKey || "",
 			mem0BaseUrl: config.platform.baseUrl || "https://api.mem0.ai",
 			configPath: CONFIG_FILE,
+			anonDistinctIdToAlias: anonIdToAlias,
 		};
 
 		const child = spawn(