diff --git a/generate_activity.php b/generate_activity.php
new file mode 100644
index 0000000..36078b3
--- /dev/null
+++ b/generate_activity.php
@@ -0,0 +1,99 @@
+<?php
+require_once __DIR__ . '/db/config.php';
+
+function generateActivity($pdo) {
+    echo "Starting to generate matches, swipes, and notifications...\n";
+
+    $stmt = $pdo->query("SELECT id, role, full_name FROM users WHERE role IN ('founder', 'investor')");
+    $users = $stmt->fetchAll(PDO::FETCH_ASSOC);
+
+    $founders = array_values(array_filter($users, fn($u) => $u['role'] === 'founder'));
+    $investors = array_values(array_filter($users, fn($u) => $u['role'] === 'investor'));
+
+    if (count($founders) < 2 || count($investors) < 2) {
+        echo "Not enough users found. Please run seed_data.php first.\n";
+        return;
+    }
+
+    echo "Found " . count($founders) . " founders and " . count($investors) . " investors.\n";
+
+    $swipeStmt = $pdo->prepare("INSERT IGNORE INTO swipes (swiper_id, swiped_id, direction, created_at) VALUES (?, ?, ?, NOW())");
+    $matchStmt = $pdo->prepare("INSERT IGNORE INTO matches (user1_id, user2_id, status, created_at) VALUES (?, ?, 'active', NOW())");
+    $msgStmt = $pdo->prepare("INSERT INTO messages (sender_id, receiver_id, content, created_at) VALUES (?, ?, ?, NOW())");
+    $notifStmt = $pdo->prepare("INSERT INTO notifications (user_id, content, created_at) VALUES (?, ?, NOW())");
+
+    // 1. Investor-Founder matches
+    foreach ($investors as $investor) {
+        $numSwipes = rand(3, 5);
+        $founderKeys = array_rand($founders, min($numSwipes, count($founders)));
+        $targetIndices = is_array($founderKeys) ? $founderKeys : [$founderKeys];
+
+        foreach ($targetIndices as $founderIdx) {
+            $founder = $founders[$founderIdx];
+            
+            // Investor likes founder
+            $swipeStmt->execute([$investor['id'], $founder['id'], 'like']);
+            
+            // 40% chance founder likes back
+            if (rand(1, 10) <= 4) {
+                $swipeStmt->execute([$founder['id'], $investor['id'], 'like']);
+                
+                $u1 = min($investor['id'], $founder['id']);
+                $u2 = max($investor['id'], $founder['id']);
+                $matchStmt->execute([$u1, $u2]);
+                
+                // Notifications
+                $notifStmt->execute([$investor['id'], "You have a new match with {$founder['full_name']}!"]);
+                $notifStmt->execute([$founder['id'], "You have a new match with {$investor['full_name']}!"]);
+
+                // Message
+                $msgStmt->execute([
+                    $investor['id'], 
+                    $founder['id'], 
+                    "Hi {$founder['full_name']}! I'm impressed by your startup's mission. Let's talk!"
+                ]);
+                echo "Match: {$investor['full_name']} <-> {$founder['full_name']}\n";
+            } else {
+                echo "Swipe: {$investor['full_name']} liked {$founder['full_name']}\n";
+            }
+        }
+    }
+
+    // 2. Founder-Founder matches
+    foreach ($founders as $index => $founder) {
+        $otherFounders = $founders;
+        unset($otherFounders[$index]);
+        $otherFounders = array_values($otherFounders);
+        
+        $numSwipes = rand(1, 2);
+        $otherKeys = array_rand($otherFounders, min($numSwipes, count($otherFounders)));
+        $targetIndices = is_array($otherKeys) ? $otherKeys : [$otherKeys];
+
+        foreach ($targetIndices as $idx) {
+            $other = $otherFounders[$idx];
+            $swipeStmt->execute([$founder['id'], $other['id'], 'like']);
+            
+            // 30% chance they match
+            if (rand(1, 10) <= 3) {
+                $swipeStmt->execute([$other['id'], $founder['id'], 'like']);
+                $u1 = min($founder['id'], $other['id']);
+                $u2 = max($founder['id'], $other['id']);
+                $matchStmt->execute([$u1, $u2]);
+                
+                $notifStmt->execute([$founder['id'], "New co-founder match with {$other['full_name']}!"]);
+                $notifStmt->execute([$other['id'], "New co-founder match with {$founder['full_name']}!"]);
+                
+                echo "Co-founder Match: {$founder['full_name']} <-> {$other['full_name']}\n";
+            }
+        }
+    }
+
+    echo "Finished generating initial activity.\n";
+}
+
+try {
+    $pdo = db();
+    generateActivity($pdo);
+} catch (Exception $e) {
+    echo "Error: " . $e->getMessage() . "\n";
+}
\ No newline at end of file