Fixed errors that preventing chat from launching

app/Agents/SmartHome/DeviceStateManager.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace App\Agents\SmartHome;
+
+use Carbon\CarbonInterval;
+use LLM\Agents\Agent\SmartHomeControl\SmartHome\Devices\SmartDevice;
+use LLM\Agents\Agent\SmartHomeControl\SmartHome\DeviceStateRepositoryInterface;
+use LLM\Agents\Agent\SmartHomeControl\SmartHome\DeviceStateStorageInterface;
+use Psr\SimpleCache\CacheInterface;
+
+final readonly class DeviceStateManager implements DeviceStateStorageInterface, DeviceStateRepositoryInterface
+{
+    private const DEVICE_STATE_TTL = 3600;
+    private const LAST_ACTION_TTL = 3600;
+    private const LAST_ACTION_KEY = 'last_action';
+
+    public function __construct(
+        private CacheInterface $cache,
+    ) {}
+
+    public function getDevice(string $id): ?SmartDevice
+    {
+        return $this->cache->get('device_' . $id);
+    }
+
+    public function update(SmartDevice $device): void
+    {
+        $this->cache->set(
+            'device_' . $device->id,
+            $device,
+            CarbonInterval::seconds(self::DEVICE_STATE_TTL),
+        );
+
+        $this->cache->set(self::LAST_ACTION_KEY, \time(), CarbonInterval::seconds(self::LAST_ACTION_TTL));
+    }
+
+    public function getLastActionTime(): ?int
+    {
+        return $this->cache->get(self::LAST_ACTION_KEY) ?? null;
+    }
+}

app/Agents/TaskSplitter/GetProjectDescription.php

@@ -4,7 +4,7 @@
 
 namespace App\Agents\TaskSplitter;
 
-use App\Agents\PhpTool;
+use LLM\Agents\Tool\PhpTool;
 
 /**
  * @extends  PhpTool<ProjectDescriptionInput>

app/Chat/SimpleChatService.php

@@ -229,4 +229,14 @@ private function callTool(SessionInterface $session, ToolCall $tool): ToolCallRe
             content: [$functionResult],
         );
     }
+
+    public function getLatestSession(): ?SessionInterface
+    {
+        return Session::latest()->first();
+    }
+
+    public function getLatestSessions(int $limit = 3): array
+    {
+        return Session::latest()->limit($limit)->get();
+    }
 }

app/Models/Session.php

@@ -57,4 +57,14 @@ public function isFinished(): bool
     {
         return $this->trashed();
     }
+
+    public function setDescription(string $description): void
+    {
+        $this->title = $description;
+    }
+
+    public function getDescription(): ?string
+    {
+        return $this->title;
+    }
 }

app/Providers/SmartHomeServiceProvider.php

@@ -4,23 +4,29 @@
 
 namespace App\Providers;
 
+use App\Agents\SmartHome\DeviceStateManager;
 use Illuminate\Contracts\Foundation\Application;
 use Illuminate\Support\ServiceProvider;
 use LLM\Agents\Agent\SmartHomeControl\SmartHome\Devices\Light;
 use LLM\Agents\Agent\SmartHomeControl\SmartHome\Devices\SmartAppliance;
 use LLM\Agents\Agent\SmartHomeControl\SmartHome\Devices\Thermostat;
 use LLM\Agents\Agent\SmartHomeControl\SmartHome\Devices\TV;
+use LLM\Agents\Agent\SmartHomeControl\SmartHome\DeviceStateRepositoryInterface;
+use LLM\Agents\Agent\SmartHomeControl\SmartHome\DeviceStateStorageInterface;
 use LLM\Agents\Agent\SmartHomeControl\SmartHome\SmartHomeSystem;
-use Psr\SimpleCache\CacheInterface;
 
 final class SmartHomeServiceProvider extends ServiceProvider
 {
     public function register(): void
     {
-        $this->app->singleton(SmartHomeSystem::class, static function (Application $app) {
-            $cache = $app->make(CacheInterface::class);
+        $this->app->singleton(DeviceStateStorageInterface::class, DeviceStateManager::class);
+        $this->app->singleton(DeviceStateRepositoryInterface::class, DeviceStateManager::class);
 
-            $smartHome = new SmartHomeSystem($cache);
+        $this->app->singleton(SmartHomeSystem::class, static function (Application $app) {
+            $smartHome = new SmartHomeSystem(
+                stateStorage: $app->make(DeviceStateStorageInterface::class),
+                stateRepository: $app->make(DeviceStateRepositoryInterface::class),
+            );
 
             // Living Room Devices
             $livingRoomAirConditioner = new SmartAppliance(