Ahora si(?

app/Console/Commands/PurgeAgentThreads.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace App\Console\Commands;
+
+use App\Models\AgentThread;
+use Illuminate\Console\Command;
+
+class PurgeAgentThreads extends Command
+{
+    protected $signature   = 'agent:purge-threads';
+    protected $description = 'Elimina los hilos de conversación del agente que hayan expirado.';
+
+    public function handle(): int
+    {
+        $deleted = AgentThread::where('expires_at', '<', now())->delete();
+
+        $this->info("Se eliminaron {$deleted} hilo(s) expirado(s).");
+
+        return self::SUCCESS;
+    }
+}