diff --git a/src/server.js b/src/server.js
index 5c37bda..c09a8e0 100644
--- a/src/server.js
+++ b/src/server.js
@@ -438,8 +438,10 @@ function startServer(host, port, openBrowser = true) {
       }
     }
 
-    // Anonymous heartbeat — count active installs
-    sendHeartbeat();
+    // Delayed heartbeat + auto-sync (don't block startup)
+    setTimeout(sendHeartbeat, 5000);
+    setTimeout(autoSync, 15000); // first sync 15s after start
+    setInterval(autoSync, 300000); // then every 5 min
   });
 }
 
@@ -448,15 +450,11 @@ function sendHeartbeat() {
     const { getOrCreateAnonId } = require('./data');
     const anon = getOrCreateAnonId();
     const pkg = require('../package.json');
-    const sessions = require('./data').loadSessions();
-    const agentCounts = {};
-    sessions.forEach(s => { agentCounts[s.tool] = (agentCounts[s.tool] || 0) + 1; });
 
     const body = JSON.stringify({
       anonId: anon.id,
       version: pkg.version,
       platform: process.platform,
-      agents: agentCounts,
     });
 
     const req = https.request({
@@ -465,12 +463,22 @@ function sendHeartbeat() {
       headers: { 'Content-Type': 'application/json', 'Content-Length': Buffer.byteLength(body) },
       timeout: 5000,
     });
-    req.on('error', () => {}); // silent fail
+    req.on('error', () => {});
     req.write(body);
     req.end();
   } catch {}
 }
 
+function autoSync() {
+  try {
+    const profile = loadGitHubProfile();
+    if (!profile || !profile.authenticated) return; // not connected — skip
+    syncLeaderboard().then(() => {
+      log('SYNC', 'Auto-sync OK');
+    }).catch(() => {});
+  } catch {}
+}
+
 // ── Helpers ─────────────────────────────────
 function json(res, data, status = 200) {
   res.writeHead(status, { 'Content-Type': 'application/json' });