diff --git a/src/Commands/DebugCommand.php b/src/Commands/DebugCommand.php
new file mode 100644
index 0000000..5607654
--- /dev/null
+++ b/src/Commands/DebugCommand.php
@@ -0,0 +1,67 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Wearepixel\Cart\Commands;
+
+use Illuminate\Console\Command;
+use Wearepixel\Cart\Cart;
+
+class DebugCommand extends Command
+{
+    protected $signature = 'cart:debug';
+
+    protected $description = 'Dump the current cart state. Only runs outside production.';
+
+    public function handle(): int
+    {
+        if (app()->isProduction()) {
+            $this->error('cart:debug is not available in production.');
+            return self::FAILURE;
+        }
+
+        $cart = app('cart');
+        $data = static::debugData($cart);
+
+        $this->info('Cart Debug');
+        $this->line('');
+        $this->line("  Driver:         <comment>{$data['driver']}</comment>");
+        $this->line("  Items:          <comment>{$data['item_count']}</comment>");
+        $this->line("  Total Quantity: <comment>{$data['total_quantity']}</comment>");
+        $this->line("  Subtotal:       <comment>{$data['subtotal']}</comment>");
+        $this->line("  Total:          <comment>{$data['total']}</comment>");
+
+        if (! empty($data['conditions'])) {
+            $this->line("  Conditions:     <comment>" . implode(', ', $data['conditions']) . '</comment>');
+        } else {
+            $this->line('  Conditions:     <comment>none</comment>');
+        }
+
+        if (! empty($data['items'])) {
+            $this->line('');
+            $this->table(['ID', 'Name', 'Price', 'Qty'], $data['items']);
+        }
+
+        return self::SUCCESS;
+    }
+
+    public static function debugData(Cart $cart): array
+    {
+        $items = $cart->getContent();
+
+        return [
+            'driver'         => $cart->getDriver()->getDriverName(),
+            'item_count'     => $items->count(),
+            'total_quantity' => (int) $cart->getTotalQuantity(),
+            'subtotal'       => (float) $cart->getSubTotal(false),
+            'total'          => (float) $cart->getTotal(),
+            'conditions'     => $cart->getConditions()->map(fn($c) => $c->getName())->values()->toArray(),
+            'items'          => $items->map(fn($item) => [
+                $item->id,
+                $item->name,
+                $item->price,
+                $item->quantity,
+            ])->values()->toArray(),
+        ];
+    }
+}
diff --git a/tests/Unit/Commands/DebugCommandTest.php b/tests/Unit/Commands/DebugCommandTest.php
new file mode 100644
index 0000000..b43f7df
--- /dev/null
+++ b/tests/Unit/Commands/DebugCommandTest.php
@@ -0,0 +1,71 @@
+<?php
+
+use Wearepixel\Cart\Cart;
+use Wearepixel\Cart\Commands\DebugCommand;
+use Wearepixel\Cart\Drivers\NullDriver;
+
+function makeDebugCart(): Cart
+{
+    $events = Mockery::mock('Illuminate\Contracts\Events\Dispatcher');
+    $events->shouldReceive('dispatch');
+
+    return new Cart(
+        new NullDriver('debug-session'),
+        $events,
+        'cart',
+        require __DIR__ . '/../../Helpers/ConfigMock.php',
+    );
+}
+
+afterEach(fn() => Mockery::close());
+
+describe('DebugCommand::debugData()', function () {
+    test('returns driver name', function () {
+        $cart = makeDebugCart();
+        $data = DebugCommand::debugData($cart);
+        expect($data['driver'])->toBe('null');
+    });
+
+    test('returns item count', function () {
+        $cart = makeDebugCart();
+        $cart->add(1, 'Widget', 10.00, 1);
+        $data = DebugCommand::debugData($cart);
+        expect($data['item_count'])->toBe(1);
+    });
+
+    test('returns total quantity', function () {
+        $cart = makeDebugCart();
+        $cart->add(1, 'Widget', 10.00, 3);
+        $data = DebugCommand::debugData($cart);
+        expect($data['total_quantity'])->toBe(3);
+    });
+
+    test('returns subtotal', function () {
+        $cart = makeDebugCart();
+        $cart->add(1, 'Widget', 25.00, 2);
+        $data = DebugCommand::debugData($cart);
+        expect($data['subtotal'])->toBe(50.00);
+    });
+
+    test('returns total', function () {
+        $cart = makeDebugCart();
+        $cart->add(1, 'Widget', 25.00, 2);
+        $data = DebugCommand::debugData($cart);
+        expect($data['total'])->toBe(50.00);
+    });
+
+    test('returns empty items array when cart is empty', function () {
+        $cart = makeDebugCart();
+        $data = DebugCommand::debugData($cart);
+        expect($data['items'])->toBeArray()->toBeEmpty();
+    });
+
+    test('returns condition names', function () {
+        $cart = makeDebugCart();
+        $cart->condition(new \Wearepixel\Cart\CartCondition([
+            'name' => 'GST', 'type' => 'tax', 'value' => '10%', 'target' => 'subtotal',
+        ]));
+        $data = DebugCommand::debugData($cart);
+        expect($data['conditions'])->toContain('GST');
+    });
+});