feat(ai): AiService (Anthropic adapter), GenerateSlug action

Implement AI domain with Anthropic API integration for slug generation.
Adds GenerateSlug action for URL-to-slug transformation and GenerateAbVariants
for A/B test variants. Includes test coverage for GenerateSlug action with
mocked AiService.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/Domains/Ai/Actions/GenerateAbVariants.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace App\Domains\Ai\Actions;
+
+use App\Domains\Ai\Services\AiService;
+
+class GenerateAbVariants
+{
+    public function __construct(private AiService $ai) {}
+
+    public function handle(string $targetUrl, int $count = 3): array
+    {
+        $prompt = "Generate {$count} A/B test URL slug variants (3-8 chars each, lowercase, hyphens only, comma-separated) for: {$targetUrl}. Reply with ONLY the comma-separated slugs.";
+
+        $result = $this->ai->complete($prompt);
+
+        if (empty($result)) {
+            return [];
+        }
+
+        return array_map(
+            fn($s) => preg_replace('/[^a-z0-9-]/', '', strtolower(trim($s))),
+            explode(',', $result)
+        );
+    }
+}

app/Domains/Ai/Actions/GenerateSlug.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace App\Domains\Ai\Actions;
+
+use App\Domains\Ai\Services\AiService;
+
+class GenerateSlug
+{
+    public function __construct(private AiService $ai) {}
+
+    public function handle(string $targetUrl): string
+    {
+        $prompt = "Generate a short, memorable URL slug (3-8 chars, lowercase, hyphens only) for this URL: {$targetUrl}. Reply with ONLY the slug, no explanation.";
+
+        $slug = $this->ai->complete($prompt);
+
+        return preg_replace('/[^a-z0-9-]/', '', strtolower($slug));
+    }
+}

app/Domains/Ai/Services/AiService.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace App\Domains\Ai\Services;
+
+use Illuminate\Support\Facades\Http;
+
+class AiService
+{
+    public function complete(string $prompt, string $model = 'claude-sonnet-4-6'): string
+    {
+        $apiKey = config('services.anthropic.api_key');
+
+        if (! $apiKey) {
+            return '';
+        }
+
+        $response = Http::withHeaders([
+            'x-api-key' => $apiKey,
+            'anthropic-version' => '2023-06-01',
+            'content-type' => 'application/json',
+        ])->post('https://api.anthropic.com/v1/messages', [
+            'model' => $model,
+            'max_tokens' => 256,
+            'messages' => [['role' => 'user', 'content' => $prompt]],
+        ]);
+
+        return trim($response->json('content.0.text') ?? '');
+    }
+}

config/services.php

@@ -35,4 +35,8 @@ return [
         ],
     ],
 
+    'anthropic' => [
+        'api_key' => env('ANTHROPIC_API_KEY'),
+    ],
+
 ];

tests/Unit/Ai/GenerateSlugTest.php

@@ -0,0 +1,16 @@
+<?php
+
+use App\Domains\Ai\Actions\GenerateSlug;
+use App\Domains\Ai\Services\AiService;
+
+it('generates slug from URL via AI service', function () {
+    $mockAi = Mockery::mock(AiService::class);
+    $mockAi->shouldReceive('complete')
+        ->once()
+        ->andReturn('best-promo');
+
+    $action = new GenerateSlug($mockAi);
+    $slug = $action->handle('https://example.com/summer-sale-2026');
+
+    expect($slug)->toBe('best-promo');
+});