feat(cli): add PostHog telemetry and source tracking to Python & Node CLIs (#4699)

cli/node/telemetry-sender.cjs

@@ -0,0 +1,108 @@
+/**
+ * Standalone telemetry sender — runs as a detached child process.
+ *
+ * Usage: node telemetry-sender.cjs '<json context>'
+ *
+ * This script is spawned by telemetry.captureEvent() and runs independently
+ * of the parent CLI process. It:
+ *
+ * 1. Resolves the user's email via /v1/ping/ if not already cached
+ * 2. Caches the email in ~/.mem0/config.json for future runs
+ * 3. Sends the PostHog event
+ *
+ * All errors are silently swallowed — this process must never produce output
+ * or affect the user experience.
+ */
+
+"use strict";
+
+const https = require("https");
+const fs = require("fs");
+
+function httpsRequest(url, method, headers, body) {
+	return new Promise((resolve, reject) => {
+		const u = new URL(url);
+		const opts = {
+			hostname: u.hostname,
+			path: u.pathname + u.search,
+			method,
+			headers,
+			timeout: 10000,
+		};
+		const req = https.request(opts, (res) => {
+			let data = "";
+			res.on("data", (chunk) => (data += chunk));
+			res.on("end", () => {
+				try {
+					resolve(JSON.parse(data));
+				} catch {
+					resolve({});
+				}
+			});
+		});
+		req.on("error", reject);
+		req.on("timeout", () => {
+			req.destroy();
+			reject(new Error("timeout"));
+		});
+		if (body) {
+			req.end(body);
+		} else {
+			req.end();
+		}
+	});
+}
+
+async function resolveAndCacheEmail(ctx, payload) {
+	try {
+		const pingUrl = ctx.mem0BaseUrl.replace(/\/+$/, "") + "/v1/ping/";
+		const data = await httpsRequest(pingUrl, "GET", {
+			Authorization: "Token " + ctx.mem0ApiKey,
+			"Content-Type": "application/json",
+		});
+		if (data.user_email) {
+			payload.distinct_id = data.user_email;
+			cacheEmail(ctx.configPath, data.user_email);
+		}
+	} catch {
+		// silently swallow
+	}
+}
+
+function cacheEmail(configPath, email) {
+	if (!configPath) return;
+	try {
+		const raw = fs.readFileSync(configPath, "utf-8");
+		const cfg = JSON.parse(raw);
+		if (!cfg.platform) cfg.platform = {};
+		cfg.platform.user_email = email;
+		fs.writeFileSync(configPath, JSON.stringify(cfg, null, 2));
+	} catch {
+		// silently swallow
+	}
+}
+
+async function sendPosthogEvent(posthogHost, payload) {
+	try {
+		const body = JSON.stringify(payload);
+		await httpsRequest(posthogHost, "POST", {
+			"Content-Type": "application/json",
+			"Content-Length": Buffer.byteLength(body),
+		}, body);
+	} catch {
+		// silently swallow
+	}
+}
+
+async function main() {
+	const ctx = JSON.parse(process.argv[2]);
+	const payload = ctx.payload;
+
+	if (ctx.needsEmail && ctx.mem0ApiKey) {
+		await resolveAndCacheEmail(ctx, payload);
+	}
+
+	await sendPosthogEvent(ctx.posthogHost, payload);
+}
+
+main().catch(() => {});