diff --git a/app/Actions/Automation/Node/RunGenerateNode.php b/app/Actions/Automation/Node/RunGenerateNode.php
index 4daa1f06..2565169b 100644
--- a/app/Actions/Automation/Node/RunGenerateNode.php
+++ b/app/Actions/Automation/Node/RunGenerateNode.php
@@ -11,6 +11,7 @@
 use App\Ai\Templates\TemplateContext;
 use App\DataTransferObjects\Automation\NodeRunResult;
 use App\Enums\Ai\ContentStyle;
+use App\Enums\Ai\GeneratorFormat;
 use App\Enums\PostPlatform\ContentType;
 use App\Models\AutomationRun;
 use App\Models\SocialAccount;
@@ -84,13 +85,13 @@ public function __invoke(AutomationRun $run, array $config): NodeRunResult
             ? $activeAccounts->get(data_get($platforms[0], 'social_account_id'))
             : null;
 
-        $isCarousel = $format === 'carousel';
+        $isCarousel = $format->isCarousel();
         $imageCount = $isCarousel ? $slideCount : ($wantsImage ? 1 : 0);
 
         $templateContext = new TemplateContext(
             workspace: $workspace,
             socialAccount: $brandAccount,
-            format: $platformContext ?? $format,
+            format: $platformContext ?? $format->value,
             imageCount: $imageCount,
             isCarousel: $isCarousel,
             applyBrandVisuals: (bool) data_get($config, 'use_brand_visuals', true),
@@ -114,12 +115,12 @@ public function __invoke(AutomationRun $run, array $config): NodeRunResult
             completionTokens: $generatorResponse->usage->completionTokens,
             provider: (string) config('ai.default'),
             model: (string) config('ai.default_text_model'),
-            metadata: ['agent' => 'post_generator', 'format' => $format, 'source' => 'automation'],
+            metadata: ['agent' => 'post_generator', 'format' => $format->value, 'source' => 'automation'],
         );
 
         $structured = $generatorResponse->structured ?? [];
 
-        $structured = $this->humanize($workspace, $structured, $format, $style->value, $applyBrandVoice, $platformContext);
+        $structured = $this->humanize($workspace, $structured, $format, $style, $applyBrandVoice, $platformContext);
 
         $intendedImageCount = $this->intendedImageCount($format, $slideCount, $wantsImage, $structured, $brandAccount, $style);
 
@@ -161,14 +162,14 @@ public function __invoke(AutomationRun $run, array $config): NodeRunResult
      * @param  array<string, mixed>  $structured
      * @return array<string, mixed>
      */
-    private function humanize(Workspace $workspace, array $structured, string $format, string $styleKey = 'image_card', bool $applyBrandVoice = true, ?string $platformContext = null): array
+    private function humanize(Workspace $workspace, array $structured, GeneratorFormat $format, ContentStyle $style, bool $applyBrandVoice = true, ?string $platformContext = null): array
     {
-        if ($styleKey === 'tweet_card' || $styleKey === 'tweet_card_image') {
+        if (! $style->humanizes()) {
             return $structured;
         }
 
         try {
-            $input = $format === 'carousel'
+            $input = $format->isCarousel()
                 ? [
                     'caption' => data_get($structured, 'caption', ''),
                     'slides' => array_map(
@@ -195,10 +196,10 @@ private function humanize(Workspace $workspace, array $structured, string $forma
                 completionTokens: $response->usage->completionTokens,
                 provider: (string) config('ai.default'),
                 model: (string) config('ai.default_text_model'),
-                metadata: ['agent' => 'post_humanizer', 'format' => $format, 'source' => 'automation'],
+                metadata: ['agent' => 'post_humanizer', 'format' => $format->value, 'source' => 'automation'],
             );
 
-            if ($format === 'carousel') {
+            if ($format->isCarousel()) {
                 $structured['caption'] = data_get($humanized, 'caption', $structured['caption'] ?? '');
                 $originalSlides = $structured['slides'] ?? [];
                 $humanizedSlides = data_get($humanized, 'slides', []);
@@ -232,15 +233,15 @@ private function humanize(Workspace $workspace, array $structured, string $forma
      *
      * @param  array<string, mixed>  $structured
      */
-    private function extractContent(array $structured, string $format, ContentStyle $style): string
+    private function extractContent(array $structured, GeneratorFormat $format, ContentStyle $style): string
     {
-        if ($style === ContentStyle::TweetCard || $style === ContentStyle::TweetCardImage) {
-            return $format === 'carousel'
+        if ($style->isTweetCard()) {
+            return $format->isCarousel()
                 ? (string) data_get($structured, 'caption', '')
                 : (string) data_get($structured, 'tweet_text', '');
         }
 
-        return $format === 'carousel'
+        return $format->isCarousel()
             ? (string) data_get($structured, 'caption', '')
             : (string) data_get($structured, 'content', '');
     }
@@ -261,7 +262,7 @@ private function extractContent(array $structured, string $format, ContentStyle
      *
      * @param  array<int, array{social_account_id: string, content_type: ?string, meta: array<string, mixed>}>  $accountsConfig
      * @param  array<string, mixed>  $config
-     * @return array{format: string, slide_count: int}
+     * @return array{format: GeneratorFormat, slide_count: int}
      */
     public function deriveFormat(array $accountsConfig, array $config): array
     {
@@ -278,10 +279,10 @@ public function deriveFormat(array $accountsConfig, array $config): array
         if ($maxImagesAcross > 1 && $targetSlideCount > 1) {
             $cap = min(GenerateNodeValidator::MAX_GENERATED_IMAGES, $maxImagesAcross);
 
-            return ['format' => 'carousel', 'slide_count' => min($targetSlideCount, $cap)];
+            return ['format' => GeneratorFormat::Carousel, 'slide_count' => min($targetSlideCount, $cap)];
         }
 
-        return ['format' => 'single', 'slide_count' => 1];
+        return ['format' => GeneratorFormat::Single, 'slide_count' => 1];
     }
 
     /**
@@ -311,17 +312,17 @@ private function resolvePlatformContext(array $accountsConfig): ?string
      *
      * @param  array<string, mixed>  $structured
      */
-    private function intendedImageCount(string $format, int $slideCount, bool $wantsImage, array $structured, ?SocialAccount $brandAccount, ContentStyle $style): int
+    private function intendedImageCount(GeneratorFormat $format, int $slideCount, bool $wantsImage, array $structured, ?SocialAccount $brandAccount, ContentStyle $style): int
     {
         if (! $brandAccount) {
             return 0;
         }
 
-        if ($style === ContentStyle::TweetCard || $style === ContentStyle::TweetCardImage) {
-            return $format === 'carousel' ? $slideCount : 1;
+        if ($style->isTweetCard()) {
+            return $format->isCarousel() ? $slideCount : 1;
         }
 
-        if ($format === 'carousel') {
+        if ($format->isCarousel()) {
             $slides = data_get($structured, 'slides', []);
 
             return is_array($slides) ? count($slides) : $slideCount;
diff --git a/app/Ai/Agents/PostContentGenerator.php b/app/Ai/Agents/PostContentGenerator.php
index 524383c7..14a82146 100644
--- a/app/Ai/Agents/PostContentGenerator.php
+++ b/app/Ai/Agents/PostContentGenerator.php
@@ -7,6 +7,7 @@
 use App\Ai\Agents\Concerns\ResolvesPlatformCopyBudget;
 use App\Ai\Templates\AiContentTemplate;
 use App\Ai\Templates\TemplateContext;
+use App\Enums\Ai\GeneratorFormat;
 use App\Models\Workspace;
 use App\Services\Ai\TemplateContextResolver;
 use Illuminate\Contracts\JsonSchema\JsonSchema;
@@ -25,7 +26,7 @@ class PostContentGenerator implements Agent, HasStructuredOutput
     public function __construct(
         public Workspace $workspace,
         public ?string $currentContent = null,
-        public string $format = 'single',
+        public GeneratorFormat $format = GeneratorFormat::Single,
         public int $slideCount = 1,
         public ?string $platformContext = null,
         public bool $applyBrandVoice = true,
@@ -51,7 +52,7 @@ public function instructions(): string
 
         $budget = $this->platformCopyBudget($this->platformContext);
 
-        if ($this->template?->generatorFormat() === 'tweet_card') {
+        if ($this->template?->style()->isTweetCard()) {
             $budget['hard_max_chars'] = 560;
             $budget['target_chars'] = 280;
         }
@@ -66,7 +67,7 @@ public function instructions(): string
             'brand_voice_traits' => $this->applyBrandVoice ? ($this->workspace->brand_voice_traits ?? []) : [],
             'content_language' => $this->workspace->content_language,
             'current_content' => $this->currentContent,
-            'format' => $this->format,
+            'format' => $this->format->value,
             'slide_count' => $this->slideCount,
             'examples' => $examples,
             'hard_max_chars' => $budget['hard_max_chars'],
@@ -81,7 +82,7 @@ public function schema(JsonSchema $schema): array
             return $this->template->schema($schema, $this->templateContext);
         }
 
-        if ($this->format === 'carousel') {
+        if ($this->format->isCarousel()) {
             return [
                 'caption' => $schema->string()->description('The Instagram caption for the carousel post.')->required(),
                 'slides' => $schema->array()
diff --git a/app/Ai/Agents/PostContentHumanizer.php b/app/Ai/Agents/PostContentHumanizer.php
index 4eba6f5c..36eb5701 100644
--- a/app/Ai/Agents/PostContentHumanizer.php
+++ b/app/Ai/Agents/PostContentHumanizer.php
@@ -5,6 +5,7 @@
 namespace App\Ai\Agents;
 
 use App\Ai\Agents\Concerns\ResolvesPlatformCopyBudget;
+use App\Enums\Ai\GeneratorFormat;
 use App\Models\Workspace;
 use Illuminate\Contracts\JsonSchema\JsonSchema;
 use Laravel\Ai\Attributes\Temperature;
@@ -27,7 +28,7 @@ class PostContentHumanizer implements Agent, HasStructuredOutput
 
     public function __construct(
         public Workspace $workspace,
-        public string $format = 'single',
+        public GeneratorFormat $format = GeneratorFormat::Single,
         public ?string $platformContext = null,
         public bool $applyBrandVoice = true,
     ) {}
@@ -43,7 +44,7 @@ public function instructions(): string
             'brand_name' => $this->workspace->name ?? '',
             'brand_voice_traits' => $this->applyBrandVoice ? ($this->workspace->brand_voice_traits ?? []) : [],
             'content_language' => $this->workspace->content_language,
-            'format' => $this->format,
+            'format' => $this->format->value,
             'hard_max_chars' => $budget['hard_max_chars'],
             'target_chars' => $budget['target_chars'],
             'platform_label' => $budget['platform_label'],
@@ -52,7 +53,7 @@ public function instructions(): string
 
     public function schema(JsonSchema $schema): array
     {
-        if ($this->format === 'carousel') {
+        if ($this->format->isCarousel()) {
             return [
                 'caption' => $schema->string()->description('The humanized Instagram caption.')->required(),
                 'slides' => $schema->array()
diff --git a/app/Ai/Agents/PostContentStreamer.php b/app/Ai/Agents/PostContentStreamer.php
index 545c8af6..3bd800e1 100644
--- a/app/Ai/Agents/PostContentStreamer.php
+++ b/app/Ai/Agents/PostContentStreamer.php
@@ -4,6 +4,7 @@
 
 namespace App\Ai\Agents;
 
+use App\Enums\Ai\GeneratorFormat;
 use App\Models\Workspace;
 use Laravel\Ai\Attributes\Temperature;
 use Laravel\Ai\Contracts\Agent;
@@ -36,7 +37,7 @@ public function instructions(): string
             'brand_voice_traits' => $this->workspace->brand_voice_traits ?? [],
             'content_language' => $this->workspace->content_language,
             'current_content' => $this->currentContent,
-            'format' => 'single',
+            'format' => GeneratorFormat::Single->value,
             'slide_count' => 1,
         ])->render();
     }
diff --git a/app/Ai/Templates/AiContentTemplate.php b/app/Ai/Templates/AiContentTemplate.php
index d88dba23..d49fb10c 100644
--- a/app/Ai/Templates/AiContentTemplate.php
+++ b/app/Ai/Templates/AiContentTemplate.php
@@ -34,9 +34,6 @@ public function needsAccount(): bool;
      */
     public function supportedFormats(): array;
 
-    /** The 'format' string passed to the generator agent (e.g. 'single'). */
-    public function generatorFormat(): string;
-
     /** The Blade view path for the generator prompt. */
     public function promptView(TemplateContext $context): string;
 
diff --git a/app/Ai/Templates/ImageCardTemplate.php b/app/Ai/Templates/ImageCardTemplate.php
index 1c05d5d2..ce2102fd 100644
--- a/app/Ai/Templates/ImageCardTemplate.php
+++ b/app/Ai/Templates/ImageCardTemplate.php
@@ -49,11 +49,6 @@ public function supportedFormats(): array
         return [];
     }
 
-    public function generatorFormat(): string
-    {
-        return 'single';
-    }
-
     public function promptView(TemplateContext $context): string
     {
         return 'prompts.post_content.generator';
diff --git a/app/Ai/Templates/TweetCardImageTemplate.php b/app/Ai/Templates/TweetCardImageTemplate.php
index ed15aa8c..59dfe7e2 100644
--- a/app/Ai/Templates/TweetCardImageTemplate.php
+++ b/app/Ai/Templates/TweetCardImageTemplate.php
@@ -47,11 +47,6 @@ public function supportedFormats(): array
         return [];
     }
 
-    public function generatorFormat(): string
-    {
-        return 'tweet_card';
-    }
-
     public function promptView(TemplateContext $context): string
     {
         return $context->isCarousel
diff --git a/app/Ai/Templates/TweetCardTemplate.php b/app/Ai/Templates/TweetCardTemplate.php
index 5f944daa..5811f24d 100644
--- a/app/Ai/Templates/TweetCardTemplate.php
+++ b/app/Ai/Templates/TweetCardTemplate.php
@@ -47,11 +47,6 @@ public function supportedFormats(): array
         return [];
     }
 
-    public function generatorFormat(): string
-    {
-        return 'tweet_card';
-    }
-
     public function promptView(TemplateContext $context): string
     {
         return $context->isCarousel
diff --git a/app/Enums/Ai/ContentStyle.php b/app/Enums/Ai/ContentStyle.php
index 038f7dba..37e081b0 100644
--- a/app/Enums/Ai/ContentStyle.php
+++ b/app/Enums/Ai/ContentStyle.php
@@ -31,6 +31,24 @@ public function needsAccount(): bool
         };
     }
 
+    /** Whether this style's generated text is run through the humanizer pass. */
+    public function humanizes(): bool
+    {
+        return match ($this) {
+            self::ImageCard => true,
+            self::TweetCard, self::TweetCardImage => false,
+        };
+    }
+
+    /** Whether this style renders the post as a tweet-style card. */
+    public function isTweetCard(): bool
+    {
+        return match ($this) {
+            self::TweetCard, self::TweetCardImage => true,
+            self::ImageCard => false,
+        };
+    }
+
     /** Public path to the picker preview thumbnail. */
     public function previewAsset(): string
     {
diff --git a/app/Enums/Ai/GeneratorFormat.php b/app/Enums/Ai/GeneratorFormat.php
new file mode 100644
index 00000000..3d4d5bea
--- /dev/null
+++ b/app/Enums/Ai/GeneratorFormat.php
@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Enums\Ai;
+
+enum GeneratorFormat: string
+{
+    case Single = 'single';
+    case Carousel = 'carousel';
+
+    public function isCarousel(): bool
+    {
+        return $this === self::Carousel;
+    }
+}
diff --git a/app/Jobs/Ai/StreamPostCreation.php b/app/Jobs/Ai/StreamPostCreation.php
index 70946076..78bfdcad 100644
--- a/app/Jobs/Ai/StreamPostCreation.php
+++ b/app/Jobs/Ai/StreamPostCreation.php
@@ -10,6 +10,8 @@
 use App\Ai\Templates\AiTemplateRegistry;
 use App\Ai\Templates\GeneratedPost;
 use App\Ai\Templates\TemplateContext;
+use App\Enums\Ai\ContentStyle;
+use App\Enums\Ai\GeneratorFormat;
 use App\Enums\Notification\Channel as NotificationChannel;
 use App\Enums\Notification\Type as NotificationType;
 use App\Enums\PostPlatform\ContentType;
@@ -53,7 +55,7 @@ public function handle(): void
         $style = app(AiTemplateRegistry::class)->find($this->template);
 
         $isCarousel = $this->format === ContentType::CAROUSEL_FORMAT;
-        $agentFormat = $isCarousel ? 'carousel' : 'single';
+        $agentFormat = $isCarousel ? GeneratorFormat::Carousel : GeneratorFormat::Single;
         $slideCount = $isCarousel && $this->imageCount > 0 ? $this->imageCount : 1;
 
         $context = new TemplateContext(
@@ -88,8 +90,7 @@ public function handle(): void
 
             $structured = $response->structured ?? [];
 
-            $humanizeFormat = $isCarousel ? 'carousel' : $agentFormat;
-            $structured = $this->humanize($workspace, $structured, $humanizeFormat, $this->template);
+            $structured = $this->humanize($workspace, $structured, $agentFormat, $style->style());
 
             $generated = $style->assemble($structured, $context);
             $post = $this->createPostFromGenerated($workspace, $generated, $socialAccount);
@@ -116,14 +117,14 @@ public function handle(): void
      * @param  array<string, mixed>  $structured
      * @return array<string, mixed>
      */
-    private function humanize(Workspace $workspace, array $structured, string $format, string $styleKey = 'image_card'): array
+    private function humanize(Workspace $workspace, array $structured, GeneratorFormat $format, ContentStyle $style): array
     {
-        if ($styleKey === 'tweet_card' || $styleKey === 'tweet_card_image') {
+        if (! $style->humanizes()) {
             return $structured;
         }
 
         try {
-            $input = $format === 'carousel'
+            $input = $format->isCarousel()
                 ? [
                     'caption' => data_get($structured, 'caption', ''),
                     'slides' => array_map(
@@ -151,7 +152,7 @@ private function humanize(Workspace $workspace, array $structured, string $forma
                 provider: (string) config('ai.default'),
                 model: (string) config('ai.default_text_model'),
                 userId: $this->userId,
-                metadata: ['agent' => 'post_humanizer', 'format' => $format],
+                metadata: ['agent' => 'post_humanizer', 'format' => $format->value],
             );
         } catch (\Throwable $e) {
             Log::warning('PostContentHumanizer failed, using generator output as-is', [
@@ -162,7 +163,7 @@ private function humanize(Workspace $workspace, array $structured, string $forma
             return $structured;
         }
 
-        if ($format === 'carousel') {
+        if ($format->isCarousel()) {
             $structured['caption'] = data_get($humanized, 'caption', $structured['caption'] ?? '');
             $originalSlides = $structured['slides'] ?? [];
             $humanizedSlides = data_get($humanized, 'slides', []);
diff --git a/tests/Feature/Ai/Templates/TemplateContractTest.php b/tests/Feature/Ai/Templates/TemplateContractTest.php
index 15c4a372..61066b2a 100644
--- a/tests/Feature/Ai/Templates/TemplateContractTest.php
+++ b/tests/Feature/Ai/Templates/TemplateContractTest.php
@@ -16,7 +16,6 @@
     expect($t->style())->toBe(ContentStyle::ImageCard)
         ->and($t->key())->toBe('image_card')
         ->and($t->needsAccount())->toBeFalse()
-        ->and($t->generatorFormat())->toBe('single')
         ->and($t->promptView($context))->toBe('prompts.post_content.generator')
         ->and($t->supportedFormats())->toBe([]);
 });
diff --git a/tests/Feature/Ai/Templates/TweetCardImageTemplateTest.php b/tests/Feature/Ai/Templates/TweetCardImageTemplateTest.php
index 1dc7a47c..d014b501 100644
--- a/tests/Feature/Ai/Templates/TweetCardImageTemplateTest.php
+++ b/tests/Feature/Ai/Templates/TweetCardImageTemplateTest.php
@@ -17,7 +17,7 @@
     expect($t->style())->toBe(ContentStyle::TweetCardImage)
         ->and($t->key())->toBe('tweet_card_image')
         ->and($t->needsAccount())->toBeTrue()
-        ->and($t->generatorFormat())->toBe('tweet_card')
+        ->and($t->style()->isTweetCard())->toBeTrue()
         ->and($t->promptView($singleContext))->toBe('prompts.post_content.tweet_card_image')
         ->and($t->promptView($carouselContext))->toBe('prompts.post_content.tweet_card_image_carousel');
 });
diff --git a/tests/Feature/Ai/Templates/TweetCardTemplateTest.php b/tests/Feature/Ai/Templates/TweetCardTemplateTest.php
index 35c1771a..ed732309 100644
--- a/tests/Feature/Ai/Templates/TweetCardTemplateTest.php
+++ b/tests/Feature/Ai/Templates/TweetCardTemplateTest.php
@@ -17,7 +17,7 @@
     expect($t->style())->toBe(ContentStyle::TweetCard)
         ->and($t->key())->toBe('tweet_card')
         ->and($t->needsAccount())->toBeTrue()
-        ->and($t->generatorFormat())->toBe('tweet_card')
+        ->and($t->style()->isTweetCard())->toBeTrue()
         ->and($t->promptView($singleContext))->toBe('prompts.post_content.tweet_card')
         ->and($t->promptView($carouselContext))->toBe('prompts.post_content.tweet_card_carousel');
 });
diff --git a/tests/Feature/Automation/GenerateNodeValidationTest.php b/tests/Feature/Automation/GenerateNodeValidationTest.php
index 0f3eaebd..cce77d0d 100644
--- a/tests/Feature/Automation/GenerateNodeValidationTest.php
+++ b/tests/Feature/Automation/GenerateNodeValidationTest.php
@@ -3,6 +3,7 @@
 declare(strict_types=1);
 
 use App\Actions\Automation\Node\RunGenerateNode;
+use App\Enums\Ai\GeneratorFormat;
 use App\Enums\UserWorkspace\Role;
 use App\Models\Automation;
 use App\Models\User;
@@ -128,20 +129,20 @@
 
     // tiktok_photo allows 35, but AI generation is capped at 10.
     expect($node->deriveFormat([['content_type' => 'tiktok_photo']], ['target_slide_count' => 15]))
-        ->toBe(['format' => 'carousel', 'slide_count' => 10]);
+        ->toBe(['format' => GeneratorFormat::Carousel, 'slide_count' => 10]);
 
     // pinterest_carousel allows only 5.
     expect($node->deriveFormat([['content_type' => 'pinterest_carousel']], ['target_slide_count' => 8]))
-        ->toBe(['format' => 'carousel', 'slide_count' => 5]);
+        ->toBe(['format' => GeneratorFormat::Carousel, 'slide_count' => 5]);
 });
 
 it('recognises facebook_post as multi-image capable (rules-derived, not a hardcoded list)', function () {
     $node = app(RunGenerateNode::class);
 
     expect($node->deriveFormat([['content_type' => 'facebook_post']], ['target_slide_count' => 6]))
-        ->toBe(['format' => 'carousel', 'slide_count' => 6]);
+        ->toBe(['format' => GeneratorFormat::Carousel, 'slide_count' => 6]);
 
     // A single-image (video) format never becomes a carousel.
     expect($node->deriveFormat([['content_type' => 'tiktok_video']], ['target_slide_count' => 5]))
-        ->toBe(['format' => 'single', 'slide_count' => 1]);
+        ->toBe(['format' => GeneratorFormat::Single, 'slide_count' => 1]);
 });
diff --git a/tests/Feature/Automation/Node/GenerateNodeTest.php b/tests/Feature/Automation/Node/GenerateNodeTest.php
index 325b86b3..93e37e44 100644
--- a/tests/Feature/Automation/Node/GenerateNodeTest.php
+++ b/tests/Feature/Automation/Node/GenerateNodeTest.php
@@ -6,6 +6,7 @@
 use App\Ai\Agents\PostContentGenerator;
 use App\Ai\Agents\PostContentHumanizer;
 use App\Enums\Ai\ContentStyle;
+use App\Enums\Ai\GeneratorFormat;
 use App\Enums\Post\Status as PostStatus;
 use App\Enums\PostPlatform\ContentType;
 use App\Models\Automation;
@@ -180,7 +181,7 @@
         'target_slide_count' => 2,
     ]);
 
-    PostContentGenerator::assertPrompted(fn ($prompt) => $prompt->agent->format === 'carousel'
+    PostContentGenerator::assertPrompted(fn ($prompt) => $prompt->agent->format === GeneratorFormat::Carousel
         && $prompt->agent->platformContext === ContentType::XPost->value);
 });
 
@@ -260,7 +261,7 @@
 
     ['format' => $format, 'slide_count' => $slideCount] = $action->deriveFormat($accountsConfig, ['target_slide_count' => 5]);
 
-    expect($format)->toBe('carousel');
+    expect($format)->toBe(GeneratorFormat::Carousel);
     expect($slideCount)->toBe(5);
 });
 
@@ -276,7 +277,7 @@
 
     ['format' => $format, 'slide_count' => $slideCount] = $action->deriveFormat($accountsConfig, ['target_slide_count' => 1]);
 
-    expect($format)->toBe('single');
+    expect($format)->toBe(GeneratorFormat::Single);
     expect($slideCount)->toBe(1);
 });
 
@@ -290,7 +291,7 @@
 
     ['format' => $format, 'slide_count' => $slideCount] = $action->deriveFormat($accountsConfig, ['target_slide_count' => 5]);
 
-    expect($format)->toBe('single');
+    expect($format)->toBe(GeneratorFormat::Single);
     expect($slideCount)->toBe(1);
 });
 
diff --git a/tests/Unit/Ai/Agents/PostContentGeneratorTest.php b/tests/Unit/Ai/Agents/PostContentGeneratorTest.php
index fd14118c..b0047685 100644
--- a/tests/Unit/Ai/Agents/PostContentGeneratorTest.php
+++ b/tests/Unit/Ai/Agents/PostContentGeneratorTest.php
@@ -3,6 +3,7 @@
 declare(strict_types=1);
 
 use App\Ai\Agents\PostContentGenerator;
+use App\Enums\Ai\GeneratorFormat;
 use App\Models\Workspace;
 use Illuminate\JsonSchema\JsonSchemaTypeFactory;
 
@@ -60,7 +61,7 @@
 
 test('single format schema returns content and image_keywords', function () {
     $workspace = Workspace::factory()->make();
-    $agent = new PostContentGenerator(workspace: $workspace, format: 'single');
+    $agent = new PostContentGenerator(workspace: $workspace, format: GeneratorFormat::Single);
 
     $schemaFactory = new JsonSchemaTypeFactory;
     $schema = $agent->schema($schemaFactory);
@@ -73,7 +74,7 @@
 
 test('carousel format schema returns caption and slides', function () {
     $workspace = Workspace::factory()->make();
-    $agent = new PostContentGenerator(workspace: $workspace, format: 'carousel', slideCount: 5);
+    $agent = new PostContentGenerator(workspace: $workspace, format: GeneratorFormat::Carousel, slideCount: 5);
 
     $schemaFactory = new JsonSchemaTypeFactory;
     $schema = $agent->schema($schemaFactory);
@@ -85,7 +86,7 @@
 
 test('carousel slide schema includes role enum', function () {
     $workspace = Workspace::factory()->make();
-    $agent = new PostContentGenerator(workspace: $workspace, format: 'carousel', slideCount: 4);
+    $agent = new PostContentGenerator(workspace: $workspace, format: GeneratorFormat::Carousel, slideCount: 4);
 
     $schemaFactory = new JsonSchemaTypeFactory;
     $schema = $agent->schema($schemaFactory);
@@ -100,7 +101,7 @@
 
 test('carousel instructions mention slide count', function () {
     $workspace = Workspace::factory()->make();
-    $agent = new PostContentGenerator(workspace: $workspace, format: 'carousel', slideCount: 5);
+    $agent = new PostContentGenerator(workspace: $workspace, format: GeneratorFormat::Carousel, slideCount: 5);
 
     $instructions = $agent->instructions();
 
@@ -110,7 +111,7 @@
 
 test('carousel instructions describe the roteiro arc with hook, development, proof and cta', function () {
     $workspace = Workspace::factory()->make();
-    $agent = new PostContentGenerator(workspace: $workspace, format: 'carousel', slideCount: 4);
+    $agent = new PostContentGenerator(workspace: $workspace, format: GeneratorFormat::Carousel, slideCount: 4);
 
     $instructions = $agent->instructions();
 
@@ -123,7 +124,7 @@
 
 test('single format instructions do not include carousel roteiro section', function () {
     $workspace = Workspace::factory()->make();
-    $agent = new PostContentGenerator(workspace: $workspace, format: 'single');
+    $agent = new PostContentGenerator(workspace: $workspace, format: GeneratorFormat::Single);
 
     $instructions = $agent->instructions();
 
@@ -133,7 +134,7 @@
 
 test('single instructions mention image_keywords', function () {
     $workspace = Workspace::factory()->make();
-    $agent = new PostContentGenerator(workspace: $workspace, format: 'single');
+    $agent = new PostContentGenerator(workspace: $workspace, format: GeneratorFormat::Single);
 
     $instructions = $agent->instructions();
 
@@ -143,7 +144,7 @@
 test('instructions include examples when platform context provided and templates exist', function () {
     $agent = new PostContentGenerator(
         workspace: Workspace::factory()->make(),
-        format: 'carousel',
+        format: GeneratorFormat::Carousel,
         slideCount: 3,
         platformContext: 'instagram_carousel',
     );
@@ -161,7 +162,7 @@
 test('instructions do not include examples section when platform context is null', function () {
     $agent = new PostContentGenerator(
         workspace: Workspace::factory()->make(),
-        format: 'single',
+        format: GeneratorFormat::Single,
     );
 
     expect($agent->instructions())->not->toContain('curated library');
@@ -170,7 +171,7 @@
 test('instructions inject the platform character cap from the shared budget', function () {
     $agent = new PostContentGenerator(
         workspace: Workspace::factory()->make(),
-        format: 'single',
+        format: GeneratorFormat::Single,
         platformContext: 'x_post',
     );
 
diff --git a/tests/Unit/Enums/ContentStyleTest.php b/tests/Unit/Enums/ContentStyleTest.php
index 77f209a2..96665ceb 100644
--- a/tests/Unit/Enums/ContentStyleTest.php
+++ b/tests/Unit/Enums/ContentStyleTest.php
@@ -21,6 +21,12 @@
     expect(ContentStyle::TweetCardImage->needsAccount())->toBeTrue();
 });
 
+test('humanizes is true only for ImageCard', function () {
+    expect(ContentStyle::ImageCard->humanizes())->toBeTrue();
+    expect(ContentStyle::TweetCard->humanizes())->toBeFalse();
+    expect(ContentStyle::TweetCardImage->humanizes())->toBeFalse();
+});
+
 test('previewAsset returns the correct public path for each case', function () {
     expect(ContentStyle::ImageCard->previewAsset())->toBe('/images/ai-templates/image-card.png');
     expect(ContentStyle::TweetCard->previewAsset())->toBe('/images/ai-templates/tweet-card.png');