diff --git a/app/Actions/Automation/Automation/GetAutomationEditorData.php b/app/Actions/Automation/Automation/GetAutomationEditorData.php
index 157e4ee13..3db30dadf 100644
--- a/app/Actions/Automation/Automation/GetAutomationEditorData.php
+++ b/app/Actions/Automation/Automation/GetAutomationEditorData.php
@@ -4,10 +4,10 @@
 
 namespace App\Actions\Automation\Automation;
 
+use App\Actions\SocialAccount\ListPinterestBoards;
 use App\Enums\SocialAccount\Platform;
 use App\Models\Automation;
 use App\Models\SocialAccount;
-use App\Services\Social\PinterestPublisher;
 use App\Services\Social\TikTokCreatorInfo;
 use Illuminate\Database\Eloquent\Collection;
 use Illuminate\Support\Collection as SupportCollection;
@@ -15,14 +15,13 @@
 class GetAutomationEditorData
 {
     public function __construct(
-        private PinterestPublisher $pinterestPublisher,
         private TikTokCreatorInfo $tikTokCreatorInfo,
     ) {}
 
     /**
      * @return array{
      *     socialAccounts: Collection<int, SocialAccount>,
-     *     pinterestBoards: SupportCollection<string, array<int, mixed>>,
+     *     pinterestBoards: SupportCollection<string, array{boards: list<array{id: string, name: string}>, truncated: bool}>,
      *     tiktokCreatorInfos: SupportCollection<string, mixed>,
      * }
      */
@@ -34,8 +33,8 @@ public function __invoke(Automation $automation): array
             ->where('platform', Platform::Pinterest)
             ->mapWithKeys(fn ($account) => [
                 $account->id => rescue(
-                    fn () => $this->pinterestPublisher->getBoards($account),
-                    [],
+                    fn () => ListPinterestBoards::execute($account),
+                    ['boards' => [], 'truncated' => false],
                     report: false,
                 ),
             ]);
diff --git a/app/Actions/SocialAccount/ListDiscordChannels.php b/app/Actions/SocialAccount/ListDiscordChannels.php
new file mode 100644
index 000000000..9e0cebf32
--- /dev/null
+++ b/app/Actions/SocialAccount/ListDiscordChannels.php
@@ -0,0 +1,19 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Actions\SocialAccount;
+
+use App\Models\SocialAccount;
+use App\Services\Social\Discord\DiscordClient;
+
+class ListDiscordChannels
+{
+    /**
+     * @return list<array{id: string, name: string}>
+     */
+    public static function execute(SocialAccount $account): array
+    {
+        return app(DiscordClient::class)->channels((string) $account->platform_user_id);
+    }
+}
diff --git a/app/Actions/SocialAccount/ListPinterestBoards.php b/app/Actions/SocialAccount/ListPinterestBoards.php
new file mode 100644
index 000000000..1d7413709
--- /dev/null
+++ b/app/Actions/SocialAccount/ListPinterestBoards.php
@@ -0,0 +1,34 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Actions\SocialAccount;
+
+use App\Models\SocialAccount;
+use App\Services\Social\PinterestPublisher;
+use Illuminate\Support\Collection;
+
+class ListPinterestBoards
+{
+    /**
+     * @return array{boards: list<array{id: string, name: string}>, truncated: bool}
+     */
+    public static function execute(SocialAccount $account): array
+    {
+        $result = app(PinterestPublisher::class)->getBoards($account);
+
+        $boards = Collection::make(data_get($result, 'boards', []))
+            ->map(fn (mixed $board): array => [
+                'id' => (string) data_get($board, 'id'),
+                'name' => (string) data_get($board, 'name'),
+            ])
+            ->filter(fn (array $board): bool => $board['id'] !== '')
+            ->values()
+            ->all();
+
+        return [
+            'boards' => $boards,
+            'truncated' => (bool) data_get($result, 'truncated', false),
+        ];
+    }
+}
diff --git a/app/Enums/PostPlatform/ContentType.php b/app/Enums/PostPlatform/ContentType.php
index b9338bc91..0d56e74cd 100644
--- a/app/Enums/PostPlatform/ContentType.php
+++ b/app/Enums/PostPlatform/ContentType.php
@@ -4,6 +4,7 @@
 
 namespace App\Enums\PostPlatform;
 
+use App\Enums\Media\Type as MediaType;
 use App\Enums\SocialAccount\Platform as SocialPlatform;
 
 enum ContentType: string
@@ -179,6 +180,267 @@ public function maxMediaCount(): int
         };
     }
 
+    /**
+     * Maximum video duration in seconds for this content type, when the
+     * platform publishes a hard cap via API. Null when unlimited, unknown,
+     * or enforced dynamically (e.g. TikTok creator_info).
+     *
+     * Single source of truth for web (via Inertia shared props), REST API,
+     * and MCP content-type listings.
+     */
+    public function maxVideoDurationSec(): ?int
+    {
+        return match ($this) {
+            self::InstagramFeed => 60,
+            self::InstagramReel => 15 * 60,
+            self::InstagramStory => 60,
+            self::FacebookPost => 240 * 60,
+            self::FacebookReel => 90,
+            self::FacebookStory => 60,
+            self::LinkedInPost, self::LinkedInPagePost => 10 * 60,
+            self::YouTubeShort => 3 * 60,
+            self::PinterestVideoPin => 15 * 60,
+            self::XPost => 140,
+            self::ThreadsPost => 5 * 60,
+            self::BlueskyPost => 60,
+            default => null,
+        };
+    }
+
+    /**
+     * Minimum attachments required (0 = no floor beyond requiresMedia()).
+     */
+    public function minMediaCount(): int
+    {
+        return match ($this) {
+            self::PinterestCarousel => 2,
+            self::TikTokPhoto => 1,
+            default => 0,
+        };
+    }
+
+    /**
+     * Whether animated GIFs are accepted (kept as GIF, not flattened to JPEG).
+     */
+    public function acceptsGif(): bool
+    {
+        return match ($this) {
+            self::XPost, self::BlueskyPost, self::MastodonPost,
+            self::DiscordMessage, self::TelegramPost => true,
+            default => false,
+        };
+    }
+
+    /**
+     * Per-type image size cap in bytes, capped at the global upload hard limit
+     * (trypost.media.max_size_mb.image). Null when images are not accepted or
+     * the platform has no tighter editor-side limit than that hard cap.
+     */
+    public function maxImageBytes(): ?int
+    {
+        $bytes = match ($this) {
+            self::InstagramFeed, self::InstagramStory => self::bytesFromMb(8),
+            self::FacebookPost => self::bytesFromMb(4),
+            self::LinkedInPost, self::LinkedInPagePost => self::bytesFromMb(5),
+            self::PinterestPin, self::PinterestCarousel => self::bytesFromMb(20),
+            self::XPost => self::bytesFromMb(5),
+            self::ThreadsPost => self::bytesFromMb(8),
+            self::MastodonPost => self::bytesFromMb(10),
+            default => null,
+        };
+
+        return self::capToHardLimit($bytes, MediaType::Image);
+    }
+
+    /**
+     * Per-type video size cap in bytes, capped at the global upload hard limit
+     * (trypost.media.max_size_mb.video). Null when videos are not accepted or
+     * the platform has no tighter editor-side limit than that hard cap.
+     */
+    public function maxVideoBytes(): ?int
+    {
+        $bytes = match ($this) {
+            self::InstagramFeed, self::InstagramStory => self::bytesFromMb(100),
+            self::InstagramReel => self::bytesFromGb(1),
+            self::FacebookPost => self::bytesFromGb(10),
+            self::FacebookReel, self::FacebookStory => self::bytesFromGb(1),
+            self::LinkedInPost, self::LinkedInPagePost => self::bytesFromGb(5),
+            self::YouTubeShort => self::bytesFromGb(256),
+            self::PinterestVideoPin => self::bytesFromGb(2),
+            self::XPost => self::bytesFromMb(512),
+            self::ThreadsPost => self::bytesFromGb(1),
+            self::BlueskyPost => self::bytesFromMb(100),
+            self::MastodonPost => self::bytesFromMb(40),
+            default => null,
+        };
+
+        return self::capToHardLimit($bytes, MediaType::Video);
+    }
+
+    /**
+     * Per-type PDF size cap in bytes, capped at the global upload hard limit.
+     * Null when documents are not accepted.
+     */
+    public function maxDocumentBytes(): ?int
+    {
+        $bytes = match ($this) {
+            self::LinkedInPost, self::LinkedInPagePost => self::bytesFromMb(100),
+            default => null,
+        };
+
+        return self::capToHardLimit($bytes, MediaType::Document);
+    }
+
+    /**
+     * Soft aspect-ratio window used by the Vue cropper / media picker.
+     *
+     * @return array{min: float, max: float}|null
+     */
+    public function aspectRatioBounds(): ?array
+    {
+        return match ($this) {
+            self::InstagramFeed => ['min' => 0.8, 'max' => 1.91],
+            self::InstagramReel, self::InstagramStory,
+            self::FacebookReel, self::FacebookStory,
+            self::YouTubeShort => ['min' => 0.5, 'max' => 0.6],
+            default => null,
+        };
+    }
+
+    /**
+     * Whether the editor should auto-fit still images into the story frame.
+     */
+    public function autoFitsImage(): bool
+    {
+        return $this === self::InstagramStory;
+    }
+
+    /**
+     * Full media-rule payload for the Vue editor (and any other consumer).
+     * Shared once via Inertia — do not re-hardcode these numbers in JS.
+     *
+     * @return array{
+     *     max_files: int,
+     *     min_files: int|null,
+     *     accept_images: bool,
+     *     accept_videos: bool,
+     *     accept_documents: bool,
+     *     requires_media: bool,
+     *     accepts_gif: bool,
+     *     forbids_mixed_media: bool,
+     *     max_image_bytes: int|null,
+     *     max_video_bytes: int|null,
+     *     max_document_bytes: int|null,
+     *     max_video_duration_sec: int|null,
+     *     aspect_ratio_min: float|null,
+     *     aspect_ratio_max: float|null,
+     *     auto_fits_image: bool
+     * }
+     */
+    public function mediaRules(): array
+    {
+        $bounds = $this->aspectRatioBounds();
+        $minFiles = $this->minMediaCount();
+
+        return [
+            'max_files' => $this->maxMediaCount(),
+            'min_files' => $minFiles > 0 ? $minFiles : null,
+            'accept_images' => $this->supportsImage(),
+            'accept_videos' => $this->supportsVideo(),
+            'accept_documents' => $this->supportsDocument(),
+            'requires_media' => $this->requiresMedia(),
+            'accepts_gif' => $this->acceptsGif(),
+            'forbids_mixed_media' => ! $this->supportsMixedMedia(),
+            'max_image_bytes' => $this->maxImageBytes(),
+            'max_video_bytes' => $this->maxVideoBytes(),
+            'max_document_bytes' => $this->maxDocumentBytes(),
+            'max_video_duration_sec' => $this->maxVideoDurationSec(),
+            'aspect_ratio_min' => $bounds['min'] ?? null,
+            'aspect_ratio_max' => $bounds['max'] ?? null,
+            'auto_fits_image' => $this->autoFitsImage(),
+        ];
+    }
+
+    /**
+     * Content-type row for REST / MCP listings (agents + API clients).
+     * Keep in sync with mediaRules() capability fields — do not omit mins.
+     *
+     * @return array{
+     *     value: string,
+     *     label: string,
+     *     description: string,
+     *     max_media_count: int,
+     *     min_media_count: int,
+     *     requires_media: bool,
+     *     accept_images: bool,
+     *     accept_videos: bool,
+     *     accept_documents: bool,
+     *     accepts_gif: bool,
+     *     forbids_mixed_media: bool,
+     *     max_video_duration_sec: int|null,
+     *     max_image_bytes: int|null,
+     *     max_video_bytes: int|null,
+     *     max_document_bytes: int|null
+     * }
+     */
+    public function toListingArray(): array
+    {
+        return [
+            'value' => $this->value,
+            'label' => $this->label(),
+            'description' => $this->description(),
+            'max_media_count' => $this->maxMediaCount(),
+            'min_media_count' => $this->minMediaCount(),
+            'requires_media' => $this->requiresMedia(),
+            'accept_images' => $this->supportsImage(),
+            'accept_videos' => $this->supportsVideo(),
+            'accept_documents' => $this->supportsDocument(),
+            'accepts_gif' => $this->acceptsGif(),
+            'forbids_mixed_media' => ! $this->supportsMixedMedia(),
+            'max_video_duration_sec' => $this->maxVideoDurationSec(),
+            'max_image_bytes' => $this->maxImageBytes(),
+            'max_video_bytes' => $this->maxVideoBytes(),
+            'max_document_bytes' => $this->maxDocumentBytes(),
+        ];
+    }
+
+    /**
+     * @return array<string, array<string, mixed>>
+     */
+    public static function mediaRulesForFrontend(): array
+    {
+        $rules = [];
+
+        foreach (self::cases() as $type) {
+            $rules[$type->value] = $type->mediaRules();
+        }
+
+        return $rules;
+    }
+
+    private static function bytesFromMb(int $megabytes): int
+    {
+        return $megabytes * 1024 * 1024;
+    }
+
+    private static function bytesFromGb(int $gigabytes): int
+    {
+        return $gigabytes * 1024 * 1024 * 1024;
+    }
+
+    /**
+     * Never advertise a soft platform ceiling above what trypost.media allows
+     * on upload (web / API / MCP signed URL).
+     */
+    private static function capToHardLimit(?int $platformBytes, MediaType $type): ?int
+    {
+        if ($platformBytes === null) {
+            return null;
+        }
+
+        return min($platformBytes, $type->maxSizeInBytes());
+    }
+
     public function supportsVideo(): bool
     {
         return match ($this) {
@@ -263,7 +525,6 @@ public function requiresMedia(): bool
             self::MastodonPost => false,
             self::TelegramPost => false,
             self::FacebookPost => false,
-            self::InstagramFeed => false,
             self::DiscordMessage => false,
             default => true,
         };
@@ -288,6 +549,7 @@ public static function aiSupported(): array
             self::MastodonPost,
             self::FacebookPost,
             self::PinterestPin,
+            self::PinterestCarousel,
         ];
     }
 
diff --git a/app/Http/Controllers/Api/SocialAccountController.php b/app/Http/Controllers/Api/SocialAccountController.php
index b6827dc58..2b31b785a 100644
--- a/app/Http/Controllers/Api/SocialAccountController.php
+++ b/app/Http/Controllers/Api/SocialAccountController.php
@@ -4,7 +4,14 @@
 
 namespace App\Http\Controllers\Api;
 
+use App\Actions\SocialAccount\ListDiscordChannels;
+use App\Actions\SocialAccount\ListPinterestBoards;
 use App\Actions\SocialAccount\ToggleSocialAccount;
+use App\Enums\SocialAccount\Platform;
+use App\Exceptions\PlatformUnavailableException;
+use App\Exceptions\Social\ErrorCategory;
+use App\Exceptions\Social\PinterestPublishException;
+use App\Exceptions\TokenExpiredException;
 use App\Http\Resources\Api\SocialAccountResource;
 use App\Models\SocialAccount;
 use Illuminate\Http\JsonResponse;
@@ -21,17 +28,70 @@ public function index(Request $request): AnonymousResourceCollection
         return SocialAccountResource::collection($accounts);
     }
 
-    public function toggle(Request $request, SocialAccount $account): SocialAccountResource|JsonResponse
+    public function toggle(Request $request, SocialAccount $account): SocialAccountResource
     {
-        if ($account->workspace_id !== $request->user()->currentWorkspace->id) {
+        $this->authorize('view', $account);
+
+        ToggleSocialAccount::execute($account);
+
+        return new SocialAccountResource($account);
+    }
+
+    public function boards(Request $request, SocialAccount $account): JsonResponse
+    {
+        $this->authorize('view', $account);
+
+        if ($account->platform !== Platform::Pinterest) {
             return response()->json(
-                ['message' => 'Account not found.'],
-                Response::HTTP_NOT_FOUND,
+                ['message' => 'Boards are only available for Pinterest accounts.'],
+                Response::HTTP_UNPROCESSABLE_ENTITY,
             );
         }
 
-        ToggleSocialAccount::execute($account);
+        try {
+            return response()->json(ListPinterestBoards::execute($account));
+        } catch (TokenExpiredException $e) {
+            return response()->json(
+                ['message' => $e->getMessage()],
+                Response::HTTP_UNAUTHORIZED,
+            );
+        } catch (PinterestPublishException $e) {
+            return response()->json(
+                ['message' => $e->userMessage],
+                $this->statusForPinterestCategory($e->category),
+            );
+        }
+    }
 
-        return new SocialAccountResource($account);
+    public function channels(Request $request, SocialAccount $account): JsonResponse
+    {
+        $this->authorize('view', $account);
+
+        if ($account->platform !== Platform::Discord) {
+            return response()->json(
+                ['message' => 'Channels are only available for Discord accounts.'],
+                Response::HTTP_UNPROCESSABLE_ENTITY,
+            );
+        }
+
+        try {
+            return response()->json([
+                'channels' => ListDiscordChannels::execute($account),
+            ]);
+        } catch (PlatformUnavailableException $e) {
+            return response()->json(
+                ['message' => $e->getMessage()],
+                Response::HTTP_BAD_GATEWAY,
+            );
+        }
+    }
+
+    private function statusForPinterestCategory(ErrorCategory $category): int
+    {
+        return match ($category) {
+            ErrorCategory::RateLimit => Response::HTTP_TOO_MANY_REQUESTS,
+            ErrorCategory::Permission => Response::HTTP_FORBIDDEN,
+            default => Response::HTTP_BAD_GATEWAY,
+        };
     }
 }
diff --git a/app/Http/Controllers/Api/UploadController.php b/app/Http/Controllers/Api/UploadController.php
index e6104975c..00e2720d7 100644
--- a/app/Http/Controllers/Api/UploadController.php
+++ b/app/Http/Controllers/Api/UploadController.php
@@ -13,11 +13,18 @@
 use Illuminate\Support\Facades\Cache;
 use Illuminate\Support\Facades\DB;
 use Symfony\Component\HttpFoundation\Response;
+use Throwable;
 
 class UploadController extends Controller
 {
     private const CACHE_TTL_BUFFER_SECONDS = 60;
 
+    /**
+     * One-shot claim for a signed upload token (api.uploads.store).
+     * Survives across MCP and any other client that POSTs the signed URL.
+     */
+    private const CLAIM_CACHE_PREFIX = 'media:signed-upload:';
+
     public function store(StoreUploadRequest $request, string $token): JsonResponse
     {
         $expiresAt = (int) $request->query('expires');
@@ -26,7 +33,9 @@ public function store(StoreUploadRequest $request, string $token): JsonResponse
             $expiresAt - now()->timestamp + self::CACHE_TTL_BUFFER_SECONDS,
         );
 
-        if (! Cache::add("mcp_upload:{$token}", true, $ttl)) {
+        $cacheKey = self::CLAIM_CACHE_PREFIX.$token;
+
+        if (! Cache::add($cacheKey, true, $ttl)) {
             abort(Response::HTTP_CONFLICT);
         }
 
@@ -34,15 +43,36 @@ public function store(StoreUploadRequest $request, string $token): JsonResponse
             abort(Response::HTTP_CONFLICT);
         }
 
-        $workspace = Workspace::findOrFail((string) $request->query('workspace_id'));
+        try {
+            $workspace = Workspace::findOrFail((string) $request->query('workspace_id'));
+            $file = $request->file('media');
+            $path = $file->getRealPath();
+
+            // Stream from PHP's temp upload path — do not load the whole file into
+            // memory (addMedia() uses file_get_contents; videos can be up to 1GB).
+            if ($path === false) {
+                abort(Response::HTTP_UNPROCESSABLE_ENTITY, 'Unable to read uploaded file.');
+            }
 
-        $media = DB::transaction(function () use ($workspace, $request, $token): Media {
-            $media = $workspace->addMedia($request->file('media'), 'assets');
-            $media->upload_token = $token;
-            $media->save();
+            $media = DB::transaction(function () use ($workspace, $file, $path, $token): Media {
+                $media = $workspace->addMediaFromPath(
+                    $path,
+                    $file->getClientOriginalName(),
+                    'assets',
+                    mimeType: (string) $file->getMimeType(),
+                );
+                $media->upload_token = $token;
+                $media->save();
 
-            return $media;
-        });
+                return $media;
+            });
+        } catch (Throwable $e) {
+            // Claim is only permanent after Media is stored — release so the
+            // signed URL can be retried after a transient disk/storage failure.
+            Cache::forget($cacheKey);
+
+            throw $e;
+        }
 
         return MediaUploadResource::make($media)
             ->response()
diff --git a/app/Http/Controllers/App/PostController.php b/app/Http/Controllers/App/PostController.php
index 7ef6f6332..c1ebc395b 100644
--- a/app/Http/Controllers/App/PostController.php
+++ b/app/Http/Controllers/App/PostController.php
@@ -9,6 +9,7 @@
 use App\Actions\Post\DuplicatePost;
 use App\Actions\Post\SyncPostPlatforms;
 use App\Actions\Post\UpdatePost;
+use App\Actions\SocialAccount\ListPinterestBoards;
 use App\Ai\Templates\AiContentTemplate;
 use App\Ai\Templates\AiTemplateRegistry;
 use App\Enums\Post\Action as PostAction;
@@ -23,7 +24,6 @@
 use App\Models\Post;
 use App\Models\PostPlatform;
 use App\Services\Post\PostMetricsFetcher;
-use App\Services\Social\PinterestPublisher;
 use App\Services\Social\TikTokCreatorInfo;
 use App\Support\PostStatusRules;
 use Carbon\Carbon;
@@ -260,8 +260,8 @@ public function edit(Request $request, Post $post): Response|RedirectResponse
             ->where('platform', Platform::Pinterest)
             ->mapWithKeys(fn ($account) => [
                 $account->id => rescue(
-                    fn () => app(PinterestPublisher::class)->getBoards($account),
-                    [],
+                    fn () => ListPinterestBoards::execute($account),
+                    ['boards' => [], 'truncated' => false],
                     report: false,
                 ),
             ]);
diff --git a/app/Http/Middleware/App/HandleInertiaRequests.php b/app/Http/Middleware/App/HandleInertiaRequests.php
index 5e51d6d89..167185be8 100644
--- a/app/Http/Middleware/App/HandleInertiaRequests.php
+++ b/app/Http/Middleware/App/HandleInertiaRequests.php
@@ -4,6 +4,7 @@
 
 namespace App\Http\Middleware\App;
 
+use App\Enums\PostPlatform\ContentType;
 use App\Http\Resources\App\HandleInertiaRequests\AuthAccountResource;
 use App\Http\Resources\App\HandleInertiaRequests\AuthPlanResource;
 use App\Http\Resources\App\HandleInertiaRequests\AuthUserResource;
@@ -62,4 +63,15 @@ public function share(Request $request): array
             'githubAuthEnabled' => config('trypost.github_auth_enabled'),
         ];
     }
+
+    /**
+     * @return array<string, callable>
+     */
+    public function shareOnce(Request $request): array
+    {
+        return [
+            ...parent::shareOnce($request),
+            'contentTypeMediaRules' => fn (): array => ContentType::mediaRulesForFrontend(),
+        ];
+    }
 }
diff --git a/app/Http/Requests/Api/StoreUploadRequest.php b/app/Http/Requests/Api/StoreUploadRequest.php
index f07237ed5..4e9665522 100644
--- a/app/Http/Requests/Api/StoreUploadRequest.php
+++ b/app/Http/Requests/Api/StoreUploadRequest.php
@@ -6,6 +6,7 @@
 
 use App\Enums\Media\Type as MediaType;
 use Illuminate\Foundation\Http\FormRequest;
+use Illuminate\Validation\Validator;
 
 class StoreUploadRequest extends FormRequest
 {
@@ -25,15 +26,42 @@ public function rules(): array
             MediaType::Document->allowedMimeTypes(),
         ));
 
-        $maxKb = (int) config('ai.mcp.upload.max_size_mb') * 1024;
-
         return [
+            // Largest per-type cap as the FormRequest upper bound; per-type
+            // enforcement runs in withValidator() below — same pattern as
+            // StoreMediaRequest + PostController::storeMedia.
             'media' => [
                 'required',
                 'file',
-                "max:{$maxKb}",
+                'max:'.MediaType::Video->maxSizeInKb(),
                 "mimetypes:{$allowed}",
             ],
         ];
     }
+
+    public function withValidator(Validator $validator): void
+    {
+        $validator->after(function (Validator $validator): void {
+            $file = $this->file('media');
+
+            if ($file === null || $validator->errors()->isNotEmpty()) {
+                return;
+            }
+
+            $type = MediaType::fromMime((string) $file->getMimeType());
+
+            if ($type === null) {
+                $validator->errors()->add('media', 'This file type is not supported.');
+
+                return;
+            }
+
+            if ($file->getSize() > $type->maxSizeInBytes()) {
+                $validator->errors()->add(
+                    'media',
+                    "File size exceeds the maximum allowed for {$type->value} ({$type->maxSizeInMb()} MB).",
+                );
+            }
+        });
+    }
 }
diff --git a/app/Http/Resources/Api/PlatformContentTypesResource.php b/app/Http/Resources/Api/PlatformContentTypesResource.php
index 1082de9fd..bc902a4c7 100644
--- a/app/Http/Resources/Api/PlatformContentTypesResource.php
+++ b/app/Http/Resources/Api/PlatformContentTypesResource.php
@@ -36,13 +36,7 @@ public function toArray(Request $request): array
             ),
             'default_content_type' => ContentType::defaultFor($platform)->value,
             'content_types' => array_map(
-                fn (ContentType $type) => [
-                    'value' => $type->value,
-                    'label' => $type->label(),
-                    'description' => $type->description(),
-                    'max_media_count' => $type->maxMediaCount(),
-                    'requires_media' => $type->requiresMedia(),
-                ],
+                fn (ContentType $type) => $type->toListingArray(),
                 array_values(ContentType::forPlatform($platform)),
             ),
         ];
diff --git a/app/Mcp/Servers/TryPostServer.php b/app/Mcp/Servers/TryPostServer.php
index cd2d18502..e9f709a20 100644
--- a/app/Mcp/Servers/TryPostServer.php
+++ b/app/Mcp/Servers/TryPostServer.php
@@ -27,6 +27,8 @@
 use App\Mcp\Tools\Signature\DeleteSignatureTool;
 use App\Mcp\Tools\Signature\ListSignaturesTool;
 use App\Mcp\Tools\Signature\UpdateSignatureTool;
+use App\Mcp\Tools\SocialAccount\ListDiscordChannelsTool;
+use App\Mcp\Tools\SocialAccount\ListPinterestBoardsTool;
 use App\Mcp\Tools\SocialAccount\ListSocialAccountsTool;
 use App\Mcp\Tools\SocialAccount\ToggleSocialAccountTool;
 use App\Mcp\Tools\Workspace\GetWorkspaceTool;
@@ -73,6 +75,8 @@ class TryPostServer extends Server
 
         // Social Accounts
         ListSocialAccountsTool::class,
+        ListPinterestBoardsTool::class,
+        ListDiscordChannelsTool::class,
         ToggleSocialAccountTool::class,
 
         // Workspace
diff --git a/app/Mcp/Tools/Platform/ListContentTypesTool.php b/app/Mcp/Tools/Platform/ListContentTypesTool.php
index a7b3b632c..fb054066c 100644
--- a/app/Mcp/Tools/Platform/ListContentTypesTool.php
+++ b/app/Mcp/Tools/Platform/ListContentTypesTool.php
@@ -14,7 +14,7 @@
 use Laravel\Mcp\Server\Tools\Annotations\IsReadOnly;
 
 #[IsReadOnly]
-#[Description('List the valid content_types per social platform plus their constraints (max content length, recommended length, max media count, whether media is required, default content_type). Use before create-post-tool / update-post-tool to know which content_type to set.')]
+#[Description('List the valid content_types per social platform plus their constraints (max/min media count, whether media is required, accept_images/videos/documents/gif, forbids_mixed_media, max video duration in seconds, per-type max image/video/document bytes, default content_type). Use before create-post-tool / update-post-tool to know which content_type to set.')]
 class ListContentTypesTool extends Tool
 {
     public function handle(Request $request): ResponseFactory
@@ -23,13 +23,7 @@ public function handle(Request $request): ResponseFactory
 
         foreach (Platform::cases() as $platform) {
             $contentTypes = array_map(
-                fn (ContentType $type) => [
-                    'value' => $type->value,
-                    'label' => $type->label(),
-                    'description' => $type->description(),
-                    'max_media_count' => $type->maxMediaCount(),
-                    'requires_media' => $type->requiresMedia(),
-                ],
+                fn (ContentType $type) => $type->toListingArray(),
                 array_values(ContentType::forPlatform($platform)),
             );
 
diff --git a/app/Mcp/Tools/Post/AttachMediaFromUrlTool.php b/app/Mcp/Tools/Post/AttachMediaFromUrlTool.php
index c8dc44329..aa0adcf7c 100644
--- a/app/Mcp/Tools/Post/AttachMediaFromUrlTool.php
+++ b/app/Mcp/Tools/Post/AttachMediaFromUrlTool.php
@@ -58,7 +58,7 @@ public function schema(JsonSchema $schema): array
                     'alt' => $u->string()->description('Optional accessibility alt text for the image (ignored for video/PDF, which have no alt text).'),
                 ]))
                 ->required()
-                ->description('Media to attach. Max 10 per call, 50MB per file. Allowed types: image/jpeg, image/png, image/gif, image/webp, video/mp4, video/quicktime, application/pdf.'),
+                ->description('Media to attach. Max 10 per call. Per-type size caps match config trypost.media (image/video/document). Allowed types: image/jpeg, image/png, image/gif, image/webp, video/mp4, video/quicktime, application/pdf.'),
         ];
     }
 }
diff --git a/app/Mcp/Tools/Post/CreatePostTool.php b/app/Mcp/Tools/Post/CreatePostTool.php
index 50c1ce08d..73730b92a 100644
--- a/app/Mcp/Tools/Post/CreatePostTool.php
+++ b/app/Mcp/Tools/Post/CreatePostTool.php
@@ -63,7 +63,7 @@ public function schema(JsonSchema $schema): array
                 ->items($schema->object(fn ($p) => [
                     'social_account_id' => $p->string()->required()->description('UUID of the connected social account.'),
                     'content_type' => $p->string()->required()->description('Format for this platform (e.g. linkedin_post, x_post, instagram_feed).'),
-                    'meta' => $p->object()->description('Per-platform metadata. Instagram/Facebook: aspect_ratio (1:1|4:5|16:9|original). TikTok: privacy_level (required to publish) + flags (allow_comments, allow_duet, allow_stitch, disclose, brand_content_toggle, brand_organic_toggle, is_aigc, auto_add_music). Pinterest: board_id (required to publish). Discord: channel_id (required to publish), mentions ([{token,label}]), embeds ([{title,description,url,image,color}]).'),
+                    'meta' => $p->object()->description('Per-platform metadata. Instagram/Facebook: aspect_ratio (1:1|4:5|16:9|original). TikTok: privacy_level (required to publish) + flags (allow_comments, allow_duet, allow_stitch, disclose, brand_content_toggle, brand_organic_toggle, is_aigc, auto_add_music). Pinterest: board_id (required to publish — call ListPinterestBoardsTool first). Discord: channel_id (required to publish — call ListDiscordChannelsTool first), mentions ([{token,label}]), embeds ([{title,description,url,image,color}]).'),
                 ]))
                 ->description('Platforms to publish on. Accounts not listed remain available but disabled.'),
         ];
diff --git a/app/Mcp/Tools/Post/RequestMediaUploadTool.php b/app/Mcp/Tools/Post/RequestMediaUploadTool.php
index 2b380e507..6585016a2 100644
--- a/app/Mcp/Tools/Post/RequestMediaUploadTool.php
+++ b/app/Mcp/Tools/Post/RequestMediaUploadTool.php
@@ -4,6 +4,7 @@
 
 namespace App\Mcp\Tools\Post;
 
+use App\Enums\Media\Type as MediaType;
 use Carbon\CarbonImmutable;
 use Illuminate\Contracts\JsonSchema\JsonSchema;
 use Illuminate\Support\Facades\URL;
@@ -14,7 +15,7 @@
 use Laravel\Mcp\Server\Attributes\Description;
 use Laravel\Mcp\Server\Tool;
 
-#[Description('Issue a one-shot signed POST URL that lets the user upload a local file (image, video, or PDF document, up to the workspace upload cap — 50 MB by default) directly to this workspace. Returns an upload_token and upload_url. Hand the URL to the user (e.g. as a curl command with `-F media=@path/to/file`) or to the MCP client. After upload, call AttachMediaFromUploadTool(post_id, upload_token) to attach the result to a post.')]
+#[Description('Issue a one-shot signed POST URL that lets the user upload a local file (image, video, or PDF document) directly to this workspace. Size caps match web/API media limits — see max_bytes_by_type (max_bytes is the overall ceiling, equal to the video cap). Returns an upload_token, upload_url, max_bytes, and max_bytes_by_type. Hand the URL to the user (e.g. as a curl command with `-F media=@path/to/file`) or to the MCP client. After upload, call AttachMediaFromUploadTool(post_id, upload_token) to attach the result to a post.')]
 class RequestMediaUploadTool extends Tool
 {
     public function handle(Request $request): Response|ResponseFactory
@@ -22,8 +23,7 @@ public function handle(Request $request): Response|ResponseFactory
         $user = $request->user();
         $workspaceId = $user->current_workspace_id;
 
-        $maxBytes = (int) config('ai.mcp.upload.max_size_mb') * 1024 * 1024;
-        $ttlMinutes = (int) config('ai.mcp.upload.url_ttl_minutes');
+        $ttlMinutes = (int) config('trypost.media.signed_upload_url_ttl_minutes');
 
         $token = (string) Str::uuid();
         $expiresAt = CarbonImmutable::now()->addMinutes($ttlMinutes);
@@ -38,7 +38,12 @@ public function handle(Request $request): Response|ResponseFactory
             'upload_token' => $token,
             'upload_url' => $uploadUrl,
             'expires_at' => $expiresAt->toIso8601String(),
-            'max_bytes' => $maxBytes,
+            'max_bytes' => MediaType::Video->maxSizeInBytes(),
+            'max_bytes_by_type' => [
+                'image' => MediaType::Image->maxSizeInBytes(),
+                'video' => MediaType::Video->maxSizeInBytes(),
+                'document' => MediaType::Document->maxSizeInBytes(),
+            ],
             'field_name' => 'media',
         ]);
     }
diff --git a/app/Mcp/Tools/Post/UpdatePostTool.php b/app/Mcp/Tools/Post/UpdatePostTool.php
index 18dea6c55..46e643b64 100644
--- a/app/Mcp/Tools/Post/UpdatePostTool.php
+++ b/app/Mcp/Tools/Post/UpdatePostTool.php
@@ -105,7 +105,7 @@ public function schema(JsonSchema $schema): array
                 ->items($schema->object(fn ($p) => [
                     'id' => $p->string()->required()->description('UUID of the post_platform row (from get-post-tool / list-posts-tool).'),
                     'content_type' => $p->string()->description('New content_type for this platform.'),
-                    'meta' => $p->object()->description('Per-platform metadata override. Instagram/Facebook: aspect_ratio. TikTok: privacy_level (required to publish) + flags. Pinterest: board_id (required to publish). Discord: channel_id (required to publish), mentions, embeds. Merged with existing meta.'),
+                    'meta' => $p->object()->description('Per-platform metadata override. Instagram/Facebook: aspect_ratio. TikTok: privacy_level (required to publish) + flags. Pinterest: board_id (required to publish — call ListPinterestBoardsTool first). Discord: channel_id (required to publish — call ListDiscordChannelsTool first), mentions, embeds. Merged with existing meta.'),
                 ]))
                 ->description('Platforms to enable for publishing. Any platform NOT listed will be disabled. Pass an empty array to disable all.'),
         ];
diff --git a/app/Mcp/Tools/SocialAccount/ListDiscordChannelsTool.php b/app/Mcp/Tools/SocialAccount/ListDiscordChannelsTool.php
new file mode 100644
index 000000000..704c4c479
--- /dev/null
+++ b/app/Mcp/Tools/SocialAccount/ListDiscordChannelsTool.php
@@ -0,0 +1,53 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Mcp\Tools\SocialAccount;
+
+use App\Actions\SocialAccount\ListDiscordChannels;
+use App\Enums\SocialAccount\Platform;
+use App\Exceptions\PlatformUnavailableException;
+use App\Models\SocialAccount;
+use Illuminate\Contracts\JsonSchema\JsonSchema;
+use Laravel\Mcp\Request;
+use Laravel\Mcp\Response;
+use Laravel\Mcp\ResponseFactory;
+use Laravel\Mcp\Server\Attributes\Description;
+use Laravel\Mcp\Server\Tool;
+
+#[Description('List Discord text/announcement channels the bot can post to for a connected Discord server. Use the returned channel id as platforms[].meta.channel_id when creating or updating a Discord post (required to publish).')]
+class ListDiscordChannelsTool extends Tool
+{
+    public function handle(Request $request): Response|ResponseFactory
+    {
+        $validated = $request->validate([
+            'account_id' => ['required', 'string', 'uuid'],
+        ]);
+
+        $account = SocialAccount::where('workspace_id', $request->user()->current_workspace_id)
+            ->find(data_get($validated, 'account_id'));
+
+        if (! $account) {
+            return Response::error('Social account not found.');
+        }
+
+        if ($account->platform !== Platform::Discord) {
+            return Response::error('This tool only works with Discord social accounts.');
+        }
+
+        try {
+            return Response::structured([
+                'channels' => ListDiscordChannels::execute($account),
+            ]);
+        } catch (PlatformUnavailableException $e) {
+            return Response::error($e->getMessage());
+        }
+    }
+
+    public function schema(JsonSchema $schema): array
+    {
+        return [
+            'account_id' => $schema->string()->required()->description('The UUID of the connected Discord social account.'),
+        ];
+    }
+}
diff --git a/app/Mcp/Tools/SocialAccount/ListPinterestBoardsTool.php b/app/Mcp/Tools/SocialAccount/ListPinterestBoardsTool.php
new file mode 100644
index 000000000..2227a193f
--- /dev/null
+++ b/app/Mcp/Tools/SocialAccount/ListPinterestBoardsTool.php
@@ -0,0 +1,54 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Mcp\Tools\SocialAccount;
+
+use App\Actions\SocialAccount\ListPinterestBoards;
+use App\Enums\SocialAccount\Platform;
+use App\Exceptions\Social\PinterestPublishException;
+use App\Exceptions\TokenExpiredException;
+use App\Models\SocialAccount;
+use Illuminate\Contracts\JsonSchema\JsonSchema;
+use Laravel\Mcp\Request;
+use Laravel\Mcp\Response;
+use Laravel\Mcp\ResponseFactory;
+use Laravel\Mcp\Server\Attributes\Description;
+use Laravel\Mcp\Server\Tool;
+
+#[Description('List Pinterest boards for a connected Pinterest account. Use the returned board id as platforms[].meta.board_id when creating or updating a Pinterest post (required to publish).')]
+class ListPinterestBoardsTool extends Tool
+{
+    public function handle(Request $request): Response|ResponseFactory
+    {
+        $validated = $request->validate([
+            'account_id' => ['required', 'string', 'uuid'],
+        ]);
+
+        $account = SocialAccount::where('workspace_id', $request->user()->current_workspace_id)
+            ->find(data_get($validated, 'account_id'));
+
+        if (! $account) {
+            return Response::error('Social account not found.');
+        }
+
+        if ($account->platform !== Platform::Pinterest) {
+            return Response::error('This tool only works with Pinterest social accounts.');
+        }
+
+        try {
+            return Response::structured(ListPinterestBoards::execute($account));
+        } catch (TokenExpiredException $e) {
+            return Response::error($e->getMessage());
+        } catch (PinterestPublishException $e) {
+            return Response::error($e->userMessage);
+        }
+    }
+
+    public function schema(JsonSchema $schema): array
+    {
+        return [
+            'account_id' => $schema->string()->required()->description('The UUID of the connected Pinterest social account.'),
+        ];
+    }
+}
diff --git a/app/Models/Traits/HasMedia.php b/app/Models/Traits/HasMedia.php
index da4b39eb8..8c41e0a99 100644
--- a/app/Models/Traits/HasMedia.php
+++ b/app/Models/Traits/HasMedia.php
@@ -16,6 +16,7 @@
 use Intervention\Image\Drivers\Gd\Driver;
 use Intervention\Image\Encoders\JpegEncoder;
 use Intervention\Image\ImageManager;
+use InvalidArgumentException;
 use RuntimeException;
 
 trait HasMedia
@@ -109,13 +110,21 @@ public function addMedia(UploadedFile $file, string $collection = 'default', arr
      * Add media from a file path (used for chunked uploads).
      * Images are normalized in memory; videos/PDFs are streamed to storage.
      */
-    public function addMediaFromPath(string $filePath, string $originalFilename, string $collection = 'default', array $meta = [], ?string $groupId = null): Media
+    public function addMediaFromPath(string $filePath, string $originalFilename, string $collection = 'default', array $meta = [], ?string $groupId = null, ?string $mimeType = null): Media
     {
         if ($this->isSingleMediaCollection($collection)) {
             $this->clearMediaCollection($collection);
         }
 
-        $mimeType = mime_content_type($filePath);
+        // Prefer an explicit MIME (e.g. from UploadedFile after FormRequest
+        // validation) — mime_content_type() misclassifies empty test fakes and
+        // some freshly written temps as application/x-empty.
+        $mimeType ??= mime_content_type($filePath) ?: null;
+
+        if ($mimeType === null) {
+            throw new InvalidArgumentException("Unable to determine MIME type for media file: {$filePath}");
+        }
+
         $type = $this->getMediaType($mimeType);
         $extension = pathinfo($originalFilename, PATHINFO_EXTENSION);
 
@@ -239,7 +248,7 @@ private function streamFileToStorage(string $filePath, string $mimeType, string
     private function getMediaType(string $mimeType): string
     {
         return (Type::classify($mimeType)
-            ?? throw new \InvalidArgumentException("Unsupported media MIME type: {$mimeType}"))->value;
+            ?? throw new InvalidArgumentException("Unsupported media MIME type: {$mimeType}"))->value;
     }
 
     private function getMediaMeta(UploadedFile $file, string $type): array
diff --git a/app/Policies/SocialAccountPolicy.php b/app/Policies/SocialAccountPolicy.php
new file mode 100644
index 000000000..94422b759
--- /dev/null
+++ b/app/Policies/SocialAccountPolicy.php
@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Policies;
+
+use App\Models\SocialAccount;
+use App\Models\User;
+use Illuminate\Auth\Access\Response;
+
+class SocialAccountPolicy
+{
+    /**
+     * Authorize access to a social account. Must live in the user's current
+     * workspace; cross-workspace lookups deny as 404 so we don't leak
+     * existence across tenants (same tenancy pattern as PostPolicy).
+     */
+    public function view(User $user, SocialAccount $account): bool|Response
+    {
+        if ($account->workspace_id !== $user->current_workspace_id) {
+            return Response::denyAsNotFound();
+        }
+
+        return true;
+    }
+}
diff --git a/app/Providers/AppServiceProvider.php b/app/Providers/AppServiceProvider.php
index 960c0244b..61349bc7c 100644
--- a/app/Providers/AppServiceProvider.php
+++ b/app/Providers/AppServiceProvider.php
@@ -159,6 +159,28 @@ protected function configureRateLimiting(): void
 
             return Limit::perMinute(60)->by($request->workspace?->id ?: $request->ip());
         });
+
+        // Signed media uploads (api.uploads.store). MCP hosts share egress IPs
+        // across tenants — key by workspace_id from the signed URL, with a high
+        // IP backstop so one client cannot flood every workspace.
+        RateLimiter::for('signed-uploads', function (Request $request) {
+            $limits = [
+                Limit::perMinute((int) config('trypost.media.signed_upload_per_ip_per_minute'))
+                    ->by("ip:{$request->ip()}"),
+            ];
+
+            $workspaceId = $request->query('workspace_id');
+
+            if (filled($workspaceId)) {
+                array_unshift(
+                    $limits,
+                    Limit::perMinute((int) config('trypost.media.signed_upload_per_workspace_per_minute'))
+                        ->by("workspace:{$workspaceId}"),
+                );
+            }
+
+            return $limits;
+        });
     }
 
     protected function configureStripeWebhooks(): void
diff --git a/app/Services/Automation/GenerateNodeValidator.php b/app/Services/Automation/GenerateNodeValidator.php
index e04991b2e..0ca56ed3e 100644
--- a/app/Services/Automation/GenerateNodeValidator.php
+++ b/app/Services/Automation/GenerateNodeValidator.php
@@ -54,12 +54,20 @@ public function issueFor(array $config): ?string
 
     private function issueForAccount(ContentType $contentType, int $imageCount): ?string
     {
-        if ($contentType->requiresMedia() && $imageCount === 0) {
-            return __('posts.edit.compliance.requires_media');
+        // Generate only produces images — video-only formats (Reel, Video Pin, …)
+        // can never be satisfied by this node.
+        if (! $contentType->supportsImage()) {
+            return __('automations.errors.generate_image_format_required');
         }
 
-        if ($imageCount > 0 && ! $contentType->supportsImage()) {
-            return __('posts.edit.compliance.no_images');
+        $min = $contentType->minMediaCount();
+
+        if ($min > 0 && $imageCount < $min) {
+            return __('posts.edit.compliance.too_few_files', ['min' => (string) $min]);
+        }
+
+        if ($contentType->requiresMedia() && $imageCount === 0) {
+            return __('posts.edit.compliance.requires_media');
         }
 
         $max = min(self::MAX_GENERATED_IMAGES, $contentType->maxMediaCount());
diff --git a/app/Services/Social/PinterestPublisher.php b/app/Services/Social/PinterestPublisher.php
index 2d97128d0..87dfb1d5c 100644
--- a/app/Services/Social/PinterestPublisher.php
+++ b/app/Services/Social/PinterestPublisher.php
@@ -405,7 +405,10 @@ private function waitForMediaProcessing(SocialAccount $account, string $mediaId,
     }
 
     /**
-     * Get user's boards for board selection.
+     * Get user's boards for board selection (follows Pinterest bookmark pagination
+     * until the API stops returning a bookmark).
+     *
+     * @return array{boards: list<array<string, mixed>>, truncated: bool}
      */
     public function getBoards(SocialAccount $account): array
     {
@@ -413,17 +416,72 @@ public function getBoards(SocialAccount $account): array
             app(ConnectionVerifier::class)->refreshToken($account);
         }
 
-        $response = $this->socialHttp()->withToken($account->access_token)
-            ->get($this->baseUrl.'/boards', [
-                'page_size' => 100,
-            ]);
+        $boards = [];
+        $bookmark = null;
+        $pages = 0;
+        $truncated = false;
+        // Absurd ceiling only — normal accounts exit when bookmark is blank.
+        $maxPages = 1000;
+
+        while (true) {
+            $pages++;
+
+            if ($pages > $maxPages) {
+                Log::warning('Pinterest get boards hit safety page cap', [
+                    'account_id' => $account->id,
+                    'pages' => $pages,
+                    'boards' => count($boards),
+                ]);
+                $truncated = true;
 
-        if ($response->failed()) {
-            Log::error('Pinterest get boards failed', ['body' => $this->redactResponseBody($response->body())]);
-            $this->handleApiError($response);
+                break;
+            }
+
+            $query = ['page_size' => 100];
+
+            if (filled($bookmark)) {
+                $query['bookmark'] = $bookmark;
+            }
+
+            $response = $this->socialHttp()->withToken($account->access_token)
+                ->get($this->baseUrl.'/boards', $query);
+
+            if ($response->failed()) {
+                Log::error('Pinterest get boards failed', ['body' => $this->redactResponseBody($response->body())]);
+                $this->handleApiError($response);
+            }
+
+            $payload = $response->json() ?? [];
+            $items = data_get($payload, 'items', []);
+
+            if (is_array($items) && $items !== []) {
+                array_push($boards, ...$items);
+            }
+
+            $nextBookmark = data_get($payload, 'bookmark');
+
+            if (blank($nextBookmark)) {
+                break;
+            }
+
+            if ($nextBookmark === $bookmark) {
+                Log::warning('Pinterest get boards returned a repeated bookmark', [
+                    'account_id' => $account->id,
+                    'pages' => $pages,
+                    'boards' => count($boards),
+                ]);
+                $truncated = true;
+
+                break;
+            }
+
+            $bookmark = $nextBookmark;
         }
 
-        return $response->json()['items'] ?? [];
+        return [
+            'boards' => $boards,
+            'truncated' => $truncated,
+        ];
     }
 
     private function handleApiError(Response $response): never
diff --git a/config/ai.php b/config/ai.php
index c28a3160f..1a393ff01 100644
--- a/config/ai.php
+++ b/config/ai.php
@@ -39,25 +39,6 @@
         ],
     ],
 
-    /*
-    |--------------------------------------------------------------------------
-    | MCP Media Upload
-    |--------------------------------------------------------------------------
-    |
-    | Settings for the MCP signed-URL upload flow. The hard cap is enforced
-    | per upload regardless of media type and is intentionally smaller than
-    | the per-type caps in config('trypost.media') because uploads flow
-    | through the app server.
-    |
-    */
-
-    'mcp' => [
-        'upload' => [
-            'max_size_mb' => (int) env('MCP_UPLOAD_MAX_SIZE_MB', 50),
-            'url_ttl_minutes' => (int) env('MCP_UPLOAD_URL_TTL_MINUTES', 15),
-        ],
-    ],
-
     /*
     |--------------------------------------------------------------------------
     | AI Providers
diff --git a/config/trypost.php b/config/trypost.php
index 96749e8ae..08cd5054a 100644
--- a/config/trypost.php
+++ b/config/trypost.php
@@ -56,6 +56,16 @@
     | uploads (StoreAssetRequest, AssetController::storeChunked), URL
     | fetches (MediaAttacher), and the MediaType enum all read from here.
     |
+    | signed_upload_url_ttl_minutes controls the temporary signed POST URL
+    | issued for api.uploads.store (MCP / direct upload flow).
+    | MEDIA_SIGNED_UPLOAD_URL_TTL_MINUTES is preferred; MCP_UPLOAD_URL_TTL_MINUTES
+    | remains as a legacy fallback. MCP_UPLOAD_MAX_SIZE_MB was removed — size
+    | caps come from max_size_mb above (uploads stream to storage).
+    |
+    | signed_upload_per_*_per_minute backs the signed-uploads rate limiter:
+    | workspace bucket first (tenants isolated on shared MCP egress), then a
+    | high IP backstop.
+    |
     */
 
     'media' => [
@@ -65,6 +75,9 @@
             // LinkedIn caps document (PDF carousel) uploads at 100MB.
             'document' => (int) env('MEDIA_DOCUMENT_MAX_SIZE_MB', 100),
         ],
+        'signed_upload_url_ttl_minutes' => (int) (env('MEDIA_SIGNED_UPLOAD_URL_TTL_MINUTES') ?? env('MCP_UPLOAD_URL_TTL_MINUTES', 15)),
+        'signed_upload_per_workspace_per_minute' => (int) env('MEDIA_SIGNED_UPLOAD_PER_WORKSPACE_PER_MINUTE', 60),
+        'signed_upload_per_ip_per_minute' => (int) env('MEDIA_SIGNED_UPLOAD_PER_IP_PER_MINUTE', 1200),
     ],
 
     /*
diff --git a/lang/ar/automations.php b/lang/ar/automations.php
index 229fedbc9..b2ca859b9 100644
--- a/lang/ar/automations.php
+++ b/lang/ar/automations.php
@@ -408,5 +408,6 @@
         'http_request_exception' => 'أطلق طلب HTTP استثناءً.',
         'http_request_failed' => 'فشل طلب HTTP.',
         'http_items_path_not_array' => 'لم يُفضِ مسار العناصر إلى قائمة.',
+        'generate_image_format_required' => 'توليد الذكاء الاصطناعي ينشئ صورًا فقط. اختر تنسيق صورة (وليس فيديو).',
     ],
 ];
diff --git a/lang/ar/posts.php b/lang/ar/posts.php
index 03d07a145..3f3b800f6 100644
--- a/lang/ar/posts.php
+++ b/lang/ar/posts.php
@@ -154,6 +154,7 @@
             'board' => 'اللوحة',
             'select_board' => 'اختر لوحة',
             'no_boards' => 'لم يتم العثور على لوحات Pinterest. أنشئ واحدة في حسابك على Pinterest أولًا.',
+            'boards_truncated' => 'تعذر تحميل بعض اللوحات. إذا كانت لوحتك مفقودة، افتح Pinterest وحاول مرة أخرى.',
             'search_board' => 'البحث في اللوحات...',
             'no_board_found' => 'لا توجد لوحة مطابقة لبحثك.',
             'board_required' => 'اختر لوحة Pinterest لنشر هذا المنشور.',
@@ -464,7 +465,7 @@
         ],
         'instagram_reel' => [
             'label' => 'ريل',
-            'description' => 'فيديو قصير حتى 90 ثانية',
+            'description' => 'فيديو قصير حتى 15 دقيقة',
         ],
         'instagram_story' => [
             'label' => 'قصة',
diff --git a/lang/de/automations.php b/lang/de/automations.php
index 69c5ca546..528cbffe4 100644
--- a/lang/de/automations.php
+++ b/lang/de/automations.php
@@ -408,5 +408,6 @@
         'http_request_exception' => 'Die HTTP-Anfrage hat eine Ausnahme ausgelöst.',
         'http_request_failed' => 'Die HTTP-Anfrage ist fehlgeschlagen.',
         'http_items_path_not_array' => 'Der Pfad zu den Einträgen ergab keine Liste.',
+        'generate_image_format_required' => 'KI-Generierung erstellt nur Bilder. Wähle ein Bildformat (kein Video).',
     ],
 ];
diff --git a/lang/de/posts.php b/lang/de/posts.php
index f876ef0e3..de87cbeda 100644
--- a/lang/de/posts.php
+++ b/lang/de/posts.php
@@ -156,6 +156,7 @@
             'board' => 'Pinnwand',
             'select_board' => 'Pinnwand auswählen',
             'no_boards' => 'Keine Pinterest-Pinnwände gefunden. Erstelle zuerst eine in deinem Pinterest-Konto.',
+            'boards_truncated' => 'Einige Pinnwände konnten nicht geladen werden. Fehlt deine, öffne Pinterest und versuche es erneut.',
             'search_board' => 'Pinnwände suchen...',
             'no_board_found' => 'Keine Pinnwand passt zu deiner Suche.',
             'board_required' => 'Wähle eine Pinterest-Pinnwand, um diesen Beitrag zu veröffentlichen.',
@@ -466,7 +467,7 @@
         ],
         'instagram_reel' => [
             'label' => 'Reel',
-            'description' => 'Kurzes Video bis zu 90 Sekunden',
+            'description' => 'Kurzes Video bis zu 15 Minuten',
         ],
         'instagram_story' => [
             'label' => 'Story',
diff --git a/lang/el/automations.php b/lang/el/automations.php
index d40fffbc3..da46f16ce 100644
--- a/lang/el/automations.php
+++ b/lang/el/automations.php
@@ -408,5 +408,6 @@
         'http_request_exception' => 'Το αίτημα HTTP προκάλεσε εξαίρεση.',
         'http_request_failed' => 'Το αίτημα HTTP απέτυχε.',
         'http_items_path_not_array' => 'Η διαδρομή στοιχείων δεν αντιστοιχήθηκε σε λίστα.',
+        'generate_image_format_required' => 'Η δημιουργία AI παράγει μόνο εικόνες. Επίλεξε μορφή εικόνας (όχι βίντεο).',
     ],
 ];
diff --git a/lang/el/posts.php b/lang/el/posts.php
index 975fbdaed..03e36c604 100644
--- a/lang/el/posts.php
+++ b/lang/el/posts.php
@@ -154,6 +154,7 @@
             'board' => 'Πίνακας',
             'select_board' => 'Επιλέξτε έναν πίνακα',
             'no_boards' => 'Δεν βρέθηκαν πίνακες Pinterest. Δημιουργήστε πρώτα έναν στον λογαριασμό σας Pinterest.',
+            'boards_truncated' => 'Ορισμένοι πίνακες δεν φορτώθηκαν. Αν λείπει ο δικός σας, ανοίξτε το Pinterest και δοκιμάστε ξανά.',
             'search_board' => 'Αναζήτηση πινάκων...',
             'no_board_found' => 'Κανένας πίνακας δεν ταιριάζει με την αναζήτησή σας.',
             'board_required' => 'Επιλέξτε έναν πίνακα Pinterest για να δημοσιεύσετε αυτή τη δημοσίευση.',
@@ -464,7 +465,7 @@
         ],
         'instagram_reel' => [
             'label' => 'Reel',
-            'description' => 'Σύντομο βίντεο έως 90 δευτερόλεπτα',
+            'description' => 'Σύντομο βίντεο έως 15 λεπτά',
         ],
         'instagram_story' => [
             'label' => 'Story',
diff --git a/lang/en/automations.php b/lang/en/automations.php
index ecc6b353c..aa10e72bb 100644
--- a/lang/en/automations.php
+++ b/lang/en/automations.php
@@ -408,5 +408,6 @@
         'http_request_exception' => 'The HTTP request threw an exception.',
         'http_request_failed' => 'The HTTP request failed.',
         'http_items_path_not_array' => 'The items path did not resolve to a list.',
+        'generate_image_format_required' => 'AI generate only creates images. Pick an image format (not video).',
     ],
 ];
diff --git a/lang/en/posts.php b/lang/en/posts.php
index dde760132..8878a7078 100644
--- a/lang/en/posts.php
+++ b/lang/en/posts.php
@@ -154,6 +154,7 @@
             'board' => 'Board',
             'select_board' => 'Select a board',
             'no_boards' => 'No Pinterest boards found. Create one in your Pinterest account first.',
+            'boards_truncated' => 'Some boards could not be loaded. If yours is missing, open Pinterest and try again.',
             'search_board' => 'Search boards...',
             'no_board_found' => 'No board matches your search.',
             'board_required' => 'Select a Pinterest board to publish this post.',
@@ -464,7 +465,7 @@
         ],
         'instagram_reel' => [
             'label' => 'Reel',
-            'description' => 'Short video up to 90 seconds',
+            'description' => 'Short video up to 15 minutes',
         ],
         'instagram_story' => [
             'label' => 'Story',
diff --git a/lang/es/automations.php b/lang/es/automations.php
index 33df62550..b8a05cd3a 100644
--- a/lang/es/automations.php
+++ b/lang/es/automations.php
@@ -408,5 +408,6 @@
         'http_request_exception' => 'La petición HTTP lanzó una excepción.',
         'http_request_failed' => 'La petición HTTP falló.',
         'http_items_path_not_array' => 'El items path no resolvió a una lista.',
+        'generate_image_format_required' => 'La generación con IA solo crea imágenes. Elige un formato de imagen (no vídeo).',
     ],
 ];
diff --git a/lang/es/posts.php b/lang/es/posts.php
index 6f53b10f4..9e00e3253 100644
--- a/lang/es/posts.php
+++ b/lang/es/posts.php
@@ -154,6 +154,7 @@
             'board' => 'Tablero',
             'select_board' => 'Selecciona un tablero',
             'no_boards' => 'No se encontraron tableros de Pinterest. Crea uno en tu cuenta de Pinterest primero.',
+            'boards_truncated' => 'No se pudieron cargar algunos tableros. Si falta el tuyo, abre Pinterest e inténtalo de nuevo.',
             'search_board' => 'Buscar tableros...',
             'no_board_found' => 'Ningún tablero coincide con tu búsqueda.',
             'board_required' => 'Selecciona un tablero de Pinterest para publicar este post.',
@@ -464,7 +465,7 @@
         ],
         'instagram_reel' => [
             'label' => 'Reel',
-            'description' => 'Video corto de hasta 90 segundos',
+            'description' => 'Video corto de hasta 15 minutos',
         ],
         'instagram_story' => [
             'label' => 'Historia',
diff --git a/lang/fr/automations.php b/lang/fr/automations.php
index 835282c87..28e92a23f 100644
--- a/lang/fr/automations.php
+++ b/lang/fr/automations.php
@@ -408,5 +408,6 @@
         'http_request_exception' => 'La requête HTTP a levé une exception.',
         'http_request_failed' => 'La requête HTTP a échoué.',
         'http_items_path_not_array' => 'Le chemin des éléments ne correspond pas à une liste.',
+        'generate_image_format_required' => 'La génération IA ne crée que des images. Choisissez un format image (pas vidéo).',
     ],
 ];
diff --git a/lang/fr/posts.php b/lang/fr/posts.php
index 2887da406..79630288e 100644
--- a/lang/fr/posts.php
+++ b/lang/fr/posts.php
@@ -154,6 +154,7 @@
             'board' => 'Tableau',
             'select_board' => 'Sélectionner un tableau',
             'no_boards' => 'Aucun tableau Pinterest trouvé. Créez-en un dans votre compte Pinterest d\'abord.',
+            'boards_truncated' => 'Certains tableaux n’ont pas pu être chargés. S’il manque le vôtre, ouvrez Pinterest et réessayez.',
             'search_board' => 'Rechercher des tableaux...',
             'no_board_found' => 'Aucun tableau ne correspond à votre recherche.',
             'board_required' => 'Sélectionnez un tableau Pinterest pour publier cette publication.',
@@ -464,7 +465,7 @@
         ],
         'instagram_reel' => [
             'label' => 'Reel',
-            'description' => 'Courte vidéo jusqu\'à 90 secondes',
+            'description' => 'Courte vidéo jusqu\'à 15 minutes',
         ],
         'instagram_story' => [
             'label' => 'Story',
diff --git a/lang/it/automations.php b/lang/it/automations.php
index 374902874..2d01db01c 100644
--- a/lang/it/automations.php
+++ b/lang/it/automations.php
@@ -408,5 +408,6 @@
         'http_request_exception' => 'La richiesta HTTP ha generato un\'eccezione.',
         'http_request_failed' => 'La richiesta HTTP non è riuscita.',
         'http_items_path_not_array' => 'Il percorso degli elementi non ha restituito un elenco.',
+        'generate_image_format_required' => 'La generazione AI crea solo immagini. Scegli un formato immagine (non video).',
     ],
 ];
diff --git a/lang/it/posts.php b/lang/it/posts.php
index 6baf99966..3f0d43e0e 100644
--- a/lang/it/posts.php
+++ b/lang/it/posts.php
@@ -154,6 +154,7 @@
             'board' => 'Bacheca',
             'select_board' => 'Seleziona una bacheca',
             'no_boards' => 'Nessuna bacheca Pinterest trovata. Creane una nel tuo account Pinterest prima.',
+            'boards_truncated' => 'Alcune bacheche non sono state caricate. Se manca la tua, apri Pinterest e riprova.',
             'search_board' => 'Cerca bacheche...',
             'no_board_found' => 'Nessuna bacheca corrisponde alla ricerca.',
             'board_required' => 'Seleziona una bacheca Pinterest per pubblicare questo post.',
@@ -464,7 +465,7 @@
         ],
         'instagram_reel' => [
             'label' => 'Reel',
-            'description' => 'Video breve fino a 90 secondi',
+            'description' => 'Video breve fino a 15 minuti',
         ],
         'instagram_story' => [
             'label' => 'Storia',
diff --git a/lang/ja/automations.php b/lang/ja/automations.php
index 96f676418..0fd2f6cea 100644
--- a/lang/ja/automations.php
+++ b/lang/ja/automations.php
@@ -408,5 +408,6 @@
         'http_request_exception' => 'HTTP リクエストで例外が発生しました。',
         'http_request_failed' => 'HTTP リクエストが失敗しました。',
         'http_items_path_not_array' => 'アイテムのパスがリストとして解決されませんでした。',
+        'generate_image_format_required' => 'AI生成は画像のみ作成します。画像フォーマットを選んでください（動画不可）。',
     ],
 ];
diff --git a/lang/ja/posts.php b/lang/ja/posts.php
index 352e6ddd5..53cc227a4 100644
--- a/lang/ja/posts.php
+++ b/lang/ja/posts.php
@@ -154,6 +154,7 @@
             'board' => 'ボード',
             'select_board' => 'ボードを選択',
             'no_boards' => 'Pinterest ボードが見つかりません。先に Pinterest アカウントで作成してください。',
+            'boards_truncated' => '一部のボードを読み込めませんでした。見つからない場合は Pinterest を開いて再試行してください。',
             'search_board' => 'ボードを検索...',
             'no_board_found' => '検索に一致するボードがありません。',
             'board_required' => 'この投稿を公開する Pinterest ボードを選択してください。',
@@ -464,7 +465,7 @@
         ],
         'instagram_reel' => [
             'label' => 'リール',
-            'description' => '最大 90 秒のショート動画',
+            'description' => '最大 15 分のショート動画',
         ],
         'instagram_story' => [
             'label' => 'ストーリー',
diff --git a/lang/ko/automations.php b/lang/ko/automations.php
index 88af31f9f..420b941f6 100644
--- a/lang/ko/automations.php
+++ b/lang/ko/automations.php
@@ -408,5 +408,6 @@
         'http_request_exception' => 'HTTP 요청에서 예외가 발생했습니다.',
         'http_request_failed' => 'HTTP 요청이 실패했습니다.',
         'http_items_path_not_array' => '항목 경로가 목록으로 해석되지 않았습니다.',
+        'generate_image_format_required' => 'AI 생성은 이미지만 만듭니다. 이미지 형식을 선택하세요(동영상 불가).',
     ],
 ];
diff --git a/lang/ko/posts.php b/lang/ko/posts.php
index 86f1f1ab5..8bb2ae08e 100644
--- a/lang/ko/posts.php
+++ b/lang/ko/posts.php
@@ -154,6 +154,7 @@
             'board' => '보드',
             'select_board' => '보드 선택',
             'no_boards' => 'Pinterest 보드를 찾을 수 없습니다. 먼저 Pinterest 계정에서 보드를 만드세요.',
+            'boards_truncated' => '일부 보드를 불러오지 못했습니다. 내 보드가 없다면 Pinterest를 연 뒤 다시 시도하세요.',
             'search_board' => '보드 검색...',
             'no_board_found' => '검색과 일치하는 보드가 없습니다.',
             'board_required' => '이 게시물을 게시할 Pinterest 보드를 선택하세요.',
@@ -464,7 +465,7 @@
         ],
         'instagram_reel' => [
             'label' => '릴스',
-            'description' => '최대 90초 짧은 동영상',
+            'description' => '최대 15분 짧은 동영상',
         ],
         'instagram_story' => [
             'label' => '스토리',
diff --git a/lang/nl/automations.php b/lang/nl/automations.php
index 8a0c082a4..eb5fde1cb 100644
--- a/lang/nl/automations.php
+++ b/lang/nl/automations.php
@@ -408,5 +408,6 @@
         'http_request_exception' => 'Het HTTP-verzoek gaf een uitzondering.',
         'http_request_failed' => 'Het HTTP-verzoek is mislukt.',
         'http_items_path_not_array' => 'Het itempad verwees niet naar een lijst.',
+        'generate_image_format_required' => 'AI-generatie maakt alleen afbeeldingen. Kies een afbeeldingsformaat (geen video).',
     ],
 ];
diff --git a/lang/nl/posts.php b/lang/nl/posts.php
index 75a6af89a..eaa2335da 100644
--- a/lang/nl/posts.php
+++ b/lang/nl/posts.php
@@ -154,6 +154,7 @@
             'board' => 'Bord',
             'select_board' => 'Selecteer een bord',
             'no_boards' => 'Geen Pinterest-borden gevonden. Maak er eerst een aan in je Pinterest-account.',
+            'boards_truncated' => 'Sommige borden konden niet worden geladen. Ontbreekt die van jou, open Pinterest en probeer opnieuw.',
             'search_board' => 'Borden zoeken...',
             'no_board_found' => 'Geen bord komt overeen met je zoekopdracht.',
             'board_required' => 'Selecteer een Pinterest-bord om deze post te publiceren.',
@@ -464,7 +465,7 @@
         ],
         'instagram_reel' => [
             'label' => 'Reel',
-            'description' => 'Korte video tot 90 seconden',
+            'description' => 'Korte video tot 15 minuten',
         ],
         'instagram_story' => [
             'label' => 'Story',
diff --git a/lang/pl/automations.php b/lang/pl/automations.php
index d40b87c8c..5a8984710 100644
--- a/lang/pl/automations.php
+++ b/lang/pl/automations.php
@@ -408,5 +408,6 @@
         'http_request_exception' => 'Żądanie HTTP zgłosiło wyjątek.',
         'http_request_failed' => 'Żądanie HTTP nie powiodło się.',
         'http_items_path_not_array' => 'Ścieżka do elementów nie zwróciła listy.',
+        'generate_image_format_required' => 'Generowanie AI tworzy tylko obrazy. Wybierz format obrazu (nie wideo).',
     ],
 ];
diff --git a/lang/pl/posts.php b/lang/pl/posts.php
index c30419ecc..74271f4ab 100644
--- a/lang/pl/posts.php
+++ b/lang/pl/posts.php
@@ -154,6 +154,7 @@
             'board' => 'Tablica',
             'select_board' => 'Wybierz tablicę',
             'no_boards' => 'Nie znaleziono tablic Pinterest. Najpierw utwórz jedną na swoim koncie Pinterest.',
+            'boards_truncated' => 'Nie udało się wczytać niektórych tablic. Jeśli brakuje twojej, otwórz Pinterest i spróbuj ponownie.',
             'search_board' => 'Szukaj tablic...',
             'no_board_found' => 'Brak tablic pasujących do wyszukiwania.',
             'board_required' => 'Wybierz tablicę Pinterest, aby opublikować ten post.',
@@ -464,7 +465,7 @@
         ],
         'instagram_reel' => [
             'label' => 'Rolka',
-            'description' => 'Krótki film do 90 sekund',
+            'description' => 'Krótki film do 15 minut',
         ],
         'instagram_story' => [
             'label' => 'Relacja',
diff --git a/lang/pt-BR/automations.php b/lang/pt-BR/automations.php
index 7b4bdfcfd..3603ca2ac 100644
--- a/lang/pt-BR/automations.php
+++ b/lang/pt-BR/automations.php
@@ -408,5 +408,6 @@
         'http_request_exception' => 'A requisição HTTP lançou uma exceção.',
         'http_request_failed' => 'A requisição HTTP falhou.',
         'http_items_path_not_array' => 'O items path não resultou em uma lista.',
+        'generate_image_format_required' => 'A geração por IA só cria imagens. Escolha um formato de imagem (não vídeo).',
     ],
 ];
diff --git a/lang/pt-BR/posts.php b/lang/pt-BR/posts.php
index 513599545..8d40e9611 100644
--- a/lang/pt-BR/posts.php
+++ b/lang/pt-BR/posts.php
@@ -154,6 +154,7 @@
             'board' => 'Quadro',
             'select_board' => 'Selecione um quadro',
             'no_boards' => 'Nenhum quadro do Pinterest encontrado. Crie um na sua conta do Pinterest primeiro.',
+            'boards_truncated' => 'Alguns boards não puderam ser carregados. Se o seu não aparecer, abra o Pinterest e tente de novo.',
             'search_board' => 'Pesquisar quadros...',
             'no_board_found' => 'Nenhum quadro encontrado.',
             'board_required' => 'Selecione um quadro do Pinterest para publicar este post.',
@@ -464,7 +465,7 @@
         ],
         'instagram_reel' => [
             'label' => 'Reels',
-            'description' => 'Vídeo curto de até 90 segundos',
+            'description' => 'Vídeo curto de até 15 minutos',
         ],
         'instagram_story' => [
             'label' => 'Story',
diff --git a/lang/ru/automations.php b/lang/ru/automations.php
index 2c059b83c..1de196ba1 100644
--- a/lang/ru/automations.php
+++ b/lang/ru/automations.php
@@ -408,5 +408,6 @@
         'http_request_exception' => 'HTTP-запрос вызвал исключение.',
         'http_request_failed' => 'HTTP-запрос не удался.',
         'http_items_path_not_array' => 'Путь к элементам не привёл к списку.',
+        'generate_image_format_required' => 'ИИ генерирует только изображения. Выберите формат изображения (не видео).',
     ],
 ];
diff --git a/lang/ru/posts.php b/lang/ru/posts.php
index c97df56c6..a2efc84e5 100644
--- a/lang/ru/posts.php
+++ b/lang/ru/posts.php
@@ -154,6 +154,7 @@
             'board' => 'Доска',
             'select_board' => 'Выберите доску',
             'no_boards' => 'Доски Pinterest не найдены. Сначала создайте доску в своём аккаунте Pinterest.',
+            'boards_truncated' => 'Некоторые доски не удалось загрузить. Если вашей нет, откройте Pinterest и попробуйте снова.',
             'search_board' => 'Поиск досок...',
             'no_board_found' => 'Нет досок по вашему запросу.',
             'board_required' => 'Выберите доску Pinterest, чтобы опубликовать этот пост.',
@@ -464,7 +465,7 @@
         ],
         'instagram_reel' => [
             'label' => 'Reels',
-            'description' => 'Короткое видео до 90 секунд',
+            'description' => 'Короткое видео до 15 минут',
         ],
         'instagram_story' => [
             'label' => 'История',
diff --git a/lang/tr/automations.php b/lang/tr/automations.php
index a033f4f9d..402d06c3a 100644
--- a/lang/tr/automations.php
+++ b/lang/tr/automations.php
@@ -408,5 +408,6 @@
         'http_request_exception' => 'HTTP isteği bir istisna oluşturdu.',
         'http_request_failed' => 'HTTP isteği başarısız oldu.',
         'http_items_path_not_array' => 'Öğe yolu bir listeye çözümlenmedi.',
+        'generate_image_format_required' => 'AI oluşturma yalnızca görsel üretir. Görsel formatı seçin (video değil).',
     ],
 ];
diff --git a/lang/tr/posts.php b/lang/tr/posts.php
index 59007cc6d..a70247885 100644
--- a/lang/tr/posts.php
+++ b/lang/tr/posts.php
@@ -156,6 +156,7 @@
             'board' => 'Pano',
             'select_board' => 'Bir pano seçin',
             'no_boards' => 'Pinterest panosu bulunamadı. Önce Pinterest hesabınızda bir tane oluşturun.',
+            'boards_truncated' => 'Bazı panolar yüklenemedi. Sizinki eksikse Pinterest’i açıp tekrar deneyin.',
             'search_board' => 'Pano ara...',
             'no_board_found' => 'Aramanızla eşleşen pano yok.',
             'board_required' => 'Bu gönderiyi yayınlamak için bir Pinterest panosu seçin.',
@@ -466,7 +467,7 @@
         ],
         'instagram_reel' => [
             'label' => 'Reel',
-            'description' => '90 saniyeye kadar kısa video',
+            'description' => '15 dakikaya kadar kısa video',
         ],
         'instagram_story' => [
             'label' => 'Hikaye',
diff --git a/lang/zh/automations.php b/lang/zh/automations.php
index b1643e2dc..e8bbb4e56 100644
--- a/lang/zh/automations.php
+++ b/lang/zh/automations.php
@@ -408,5 +408,6 @@
         'http_request_exception' => 'HTTP 请求抛出了异常。',
         'http_request_failed' => 'HTTP 请求失败。',
         'http_items_path_not_array' => '条目路径未解析为列表。',
+        'generate_image_format_required' => 'AI 生成仅创建图片。请选择图片格式（不支持视频）。',
     ],
 ];
diff --git a/lang/zh/posts.php b/lang/zh/posts.php
index fc5d3cb3d..9cf3a6a71 100644
--- a/lang/zh/posts.php
+++ b/lang/zh/posts.php
@@ -154,6 +154,7 @@
             'board' => '图板',
             'select_board' => '选择一个图板',
             'no_boards' => '未找到 Pinterest 图板。请先在你的 Pinterest 账号中创建一个。',
+            'boards_truncated' => '部分图板未能加载。如果没有看到你的图板，请打开 Pinterest 后重试。',
             'search_board' => '搜索图板…',
             'no_board_found' => '没有与搜索匹配的图板。',
             'board_required' => '请选择一个 Pinterest 图板以发布此帖子。',
@@ -464,7 +465,7 @@
         ],
         'instagram_reel' => [
             'label' => 'Reel',
-            'description' => '最长 90 秒的短视频',
+            'description' => '最长 15 分钟的短视频',
         ],
         'instagram_story' => [
             'label' => '快拍',
diff --git a/resources/js/app.ts b/resources/js/app.ts
index de757e698..6bdb68d69 100644
--- a/resources/js/app.ts
+++ b/resources/js/app.ts
@@ -9,6 +9,7 @@ import { createApp, h } from 'vue';
 
 import { initializeDataLayer } from './datalayer';
 import dayjs from './dayjs';
+import { syncContentTypeMediaRules } from './lib/contentTypeMediaRules';
 import { capturePageview, initializePostHog, syncPostHogContext } from './posthog';
 import type { Auth } from './types';
 
@@ -46,10 +47,12 @@ createInertiaApp({
         // re-attach the right workspace group.
         initializePostHog();
         syncPostHogContext(props.initialPage);
+        syncContentTypeMediaRules(props.initialPage);
         capturePageview();
 
         router.on('navigate', (event) => {
             syncPostHogContext(event.detail.page);
+            syncContentTypeMediaRules(event.detail.page);
             capturePageview();
         });
 
diff --git a/resources/js/components/ChannelConfigurator.vue b/resources/js/components/ChannelConfigurator.vue
index 1feb31e29..ce3d00e87 100644
--- a/resources/js/components/ChannelConfigurator.vue
+++ b/resources/js/components/ChannelConfigurator.vue
@@ -153,6 +153,7 @@ const selectedChannels = computed(() => props.channels.filter((channel) => isSel
                 :content-type="channel.contentType"
                 :media="media"
                 :boards="channel.boards ?? []"
+                :boards-truncated="channel.boardsTruncated ?? false"
                 :meta="channel.meta"
                 :disabled="disabled"
                 :preview-only="previewOnly"
diff --git a/resources/js/components/automations/config/GenerateNodeConfig.vue b/resources/js/components/automations/config/GenerateNodeConfig.vue
index 1d73d91bc..0f1abd6a7 100644
--- a/resources/js/components/automations/config/GenerateNodeConfig.vue
+++ b/resources/js/components/automations/config/GenerateNodeConfig.vue
@@ -13,7 +13,7 @@ import { Switch } from '@/components/ui/switch';
 import { useExpandedEditor } from '@/composables/useExpandedEditor';
 import { getMediaRulesForContentType } from '@/composables/useMediaRules';
 import { getMediaIncompatibilityReason, getPlatformMetaIssue } from '@/composables/usePostCompliance';
-import type { PinterestBoard } from '@/types';
+import type { PinterestBoard, PinterestBoardsPayload } from '@/types';
 import type { Channel } from '@/types/channel';
 import { ContentType } from '@/types/content-type';
 import type { MediaItem } from '@/types/media';
@@ -91,8 +91,8 @@ const platformConfigs = computed<Record<string, any>>(() => {
     return raw ?? {};
 });
 
-const pinterestBoards = computed<Record<string, PinterestBoard[]>>(() => {
-    const raw = page.props.pinterestBoards as Record<string, PinterestBoard[]> | undefined;
+const pinterestBoards = computed<Record<string, PinterestBoardsPayload>>(() => {
+    const raw = page.props.pinterestBoards as Record<string, PinterestBoardsPayload> | undefined;
     return raw ?? {};
 });
 
@@ -113,7 +113,7 @@ const defaultContentTypeFor = (platform: string): string => {
         case Platform.LinkedInPage:
             return ContentType.LinkedInPagePost;
         case Platform.TikTok:
-            return ContentType.TikTokVideo;
+            return ContentType.TikTokPhoto;
         case Platform.Pinterest:
             return ContentType.PinterestPin;
         case Platform.YouTube:
@@ -209,7 +209,10 @@ const getCreatorInfo = (account: SocialAccount): TikTokCreatorInfo | null =>
     tiktokCreatorInfos.value[account.id] ?? null;
 
 const getBoards = (account: SocialAccount): PinterestBoard[] =>
-    pinterestBoards.value[account.id] ?? [];
+    pinterestBoards.value[account.id]?.boards ?? [];
+
+const boardsTruncated = (account: SocialAccount): boolean =>
+    pinterestBoards.value[account.id]?.truncated ?? false;
 
 // Image-capability is derived from the SAME media rules the post editor uses
 // (per content type), never a hardcoded list — facebook_post, tiktok_photo,
@@ -229,11 +232,32 @@ const imageCountCap = computed(() =>
     ),
 );
 
-// Single picker: 0 = no image (text-only), 1 = single image, 2+ = carousel.
-const imageCountOptions = computed(() =>
-    Array.from({ length: imageCountCap.value + 1 }, (_, i) => i),
+// Floor at requiresMedia (1) or content-type minFiles (e.g. Pinterest carousel = 2)
+// — otherwise the empty-accounts clamp to 0 sticks after selecting them and
+// surfaces a false "add an image" compliance error / under-min carousel.
+const minImageCount = computed(() =>
+    local.value.accounts.reduce((floor, a) => {
+        const rules = getMediaRulesForContentType(a.content_type);
+        let accountMin = 0;
+        if (rules.requiresMedia) {
+            accountMin = Math.max(accountMin, 1);
+        }
+        if (rules.minFiles) {
+            accountMin = Math.max(accountMin, rules.minFiles);
+        }
+        return Math.max(floor, accountMin);
+    }, 0),
 );
 
+// Single picker: 0 = no image (text-only), 1 = single image, 2+ = carousel.
+// Option 0 is omitted when a media-required account is selected.
+const imageCountOptions = computed(() => {
+    const min = Math.min(minImageCount.value, imageCountCap.value);
+    const max = imageCountCap.value;
+
+    return Array.from({ length: Math.max(0, max - min + 1) }, (_, i) => i + min);
+});
+
 const intendedImageCount = computed(() => local.value.target_slide_count);
 
 const syntheticImages = (count: number): MediaItem[] =>
@@ -251,14 +275,23 @@ const accountIssue = (accountId: string): string | null => {
     return account ? getPlatformMetaIssue(account.platform, entry.meta) : null;
 };
 
-// Clamp the chosen count to what the selected accounts actually allow — runs on
-// mount too so legacy/over-cap values (or text-only accounts → 0) self-correct.
+// Clamp the chosen count into [min, cap] for the current selection. Skip while
+// no accounts are selected so the default of 1 is preserved until the user
+// picks a destination (avoids clamp-to-0 → select Pinterest → stuck at 0).
 watch(
-    imageCountCap,
-    (cap) => {
+    [imageCountCap, minImageCount, () => local.value.accounts.length],
+    ([cap, min, accountCount]) => {
+        if (accountCount === 0) {
+            return;
+        }
+
         if (local.value.target_slide_count > cap) {
             local.value.target_slide_count = cap;
         }
+
+        if (local.value.target_slide_count < min) {
+            local.value.target_slide_count = Math.min(min, cap);
+        }
     },
     { immediate: true },
 );
@@ -279,6 +312,7 @@ const channels = computed<Channel[]>(() =>
             publishConfig: getPublishConfig(account),
             creatorInfo: getCreatorInfo(account),
             boards: getBoards(account),
+            boardsTruncated: boardsTruncated(account),
         };
     }),
 );
diff --git a/resources/js/components/posts/editor/FacebookSettings.vue b/resources/js/components/posts/editor/FacebookSettings.vue
index af379ebbc..65d5ef215 100644
--- a/resources/js/components/posts/editor/FacebookSettings.vue
+++ b/resources/js/components/posts/editor/FacebookSettings.vue
@@ -1,10 +1,11 @@
 <script setup lang="ts">
 import { IconAlertTriangle, IconChevronDown, IconChevronUp } from '@tabler/icons-vue';
-import { computed, ref } from 'vue';
+import { computed, ref, watch } from 'vue';
 
 import { Avatar } from '@/components/ui/avatar';
 import { getMediaValidationWarning } from '@/composables/useMedia';
 import { getPlatformLogo } from '@/composables/usePlatformLogo';
+import { fallbackImageCapableVariant, filterImageCapableVariants } from '@/lib/aiGenerateVariants';
 import { ContentType } from '@/types/content-type';
 import type { MediaItem } from '@/types/media';
 
@@ -38,11 +39,24 @@ const emit = defineEmits<{
 
 const open = ref(false);
 
-const variants = [
+const allVariants = [
     { value: ContentType.FacebookPost, labelKey: 'posts.form.facebook.variant.post' },
     { value: ContentType.FacebookReel, labelKey: 'posts.form.facebook.variant.reel' },
     { value: ContentType.FacebookStory, labelKey: 'posts.form.facebook.variant.story' },
-];
+] as const;
+
+const variants = computed(() => filterImageCapableVariants(allVariants, props.previewOnly));
+
+watch(
+    () => [props.previewOnly, props.contentType, variants.value] as const,
+    () => {
+        const fallback = fallbackImageCapableVariant(props.contentType, variants.value);
+        if (fallback) {
+            emit('update:contentType', fallback);
+        }
+    },
+    { immediate: true },
+);
 
 const aspectRatios = [
     { value: '1:1', labelKey: 'posts.form.facebook.aspect.square' },
diff --git a/resources/js/components/posts/editor/InstagramSettings.vue b/resources/js/components/posts/editor/InstagramSettings.vue
index 5cb4bfaee..1c16b4975 100644
--- a/resources/js/components/posts/editor/InstagramSettings.vue
+++ b/resources/js/components/posts/editor/InstagramSettings.vue
@@ -1,10 +1,11 @@
 <script setup lang="ts">
 import { IconAlertTriangle, IconChevronDown, IconChevronUp } from '@tabler/icons-vue';
-import { computed, ref } from 'vue';
+import { computed, ref, watch } from 'vue';
 
 import { Avatar } from '@/components/ui/avatar';
 import { getMediaValidationWarning } from '@/composables/useMedia';
 import { getPlatformLogo } from '@/composables/usePlatformLogo';
+import { fallbackImageCapableVariant, filterImageCapableVariants } from '@/lib/aiGenerateVariants';
 import { ContentType } from '@/types/content-type';
 import type { MediaItem } from '@/types/media';
 
@@ -38,11 +39,24 @@ const emit = defineEmits<{
 
 const open = ref(false);
 
-const variants = [
+const allVariants = [
     { value: ContentType.InstagramFeed, labelKey: 'posts.form.instagram.variant.feed' },
     { value: ContentType.InstagramReel, labelKey: 'posts.form.instagram.variant.reel' },
     { value: ContentType.InstagramStory, labelKey: 'posts.form.instagram.variant.story' },
-];
+] as const;
+
+const variants = computed(() => filterImageCapableVariants(allVariants, props.previewOnly));
+
+watch(
+    () => [props.previewOnly, props.contentType, variants.value] as const,
+    () => {
+        const fallback = fallbackImageCapableVariant(props.contentType, variants.value);
+        if (fallback) {
+            emit('update:contentType', fallback);
+        }
+    },
+    { immediate: true },
+);
 
 const aspectRatios = [
     { value: '1:1', labelKey: 'posts.form.instagram.aspect.square' },
diff --git a/resources/js/components/posts/editor/PinterestSettings.vue b/resources/js/components/posts/editor/PinterestSettings.vue
index ea6e64793..e3c6c78a9 100644
--- a/resources/js/components/posts/editor/PinterestSettings.vue
+++ b/resources/js/components/posts/editor/PinterestSettings.vue
@@ -1,6 +1,6 @@
 <script setup lang="ts">
 import { IconAlertTriangle, IconChevronDown, IconChevronUp } from '@tabler/icons-vue';
-import { computed, ref } from 'vue';
+import { computed, ref, watch } from 'vue';
 
 import InputError from '@/components/InputError.vue';
 import { Avatar } from '@/components/ui/avatar';
@@ -17,6 +17,7 @@ import {
 import { getMediaValidationWarning } from '@/composables/useMedia';
 import { usePageErrors } from '@/composables/usePageErrors';
 import { getPlatformLogo } from '@/composables/usePlatformLogo';
+import { fallbackImageCapableVariant, filterImageCapableVariants } from '@/lib/aiGenerateVariants';
 import type { PinterestBoard } from '@/types';
 import { ContentType } from '@/types/content-type';
 import type { MediaItem } from '@/types/media';
@@ -39,6 +40,7 @@ interface Props {
     contentType: string;
     media: MediaItem[];
     boards: PinterestBoard[];
+    boardsTruncated?: boolean;
     meta: Record<string, any>;
     disabled?: boolean;
     previewOnly?: boolean;
@@ -47,6 +49,7 @@ interface Props {
 const props = withDefaults(defineProps<Props>(), {
     disabled: false,
     previewOnly: false,
+    boardsTruncated: false,
 });
 
 const emit = defineEmits<{
@@ -56,11 +59,25 @@ const emit = defineEmits<{
 
 const open = ref(false);
 
-const variants = [
+const allVariants = [
     { value: ContentType.PinterestPin, labelKey: 'posts.form.pinterest.variant.pin' },
     { value: ContentType.PinterestVideoPin, labelKey: 'posts.form.pinterest.variant.video_pin' },
     { value: ContentType.PinterestCarousel, labelKey: 'posts.form.pinterest.variant.carousel' },
-];
+] as const;
+
+// Generate node only creates images — hide Video Pin there.
+const variants = computed(() => filterImageCapableVariants(allVariants, props.previewOnly));
+
+watch(
+    () => [props.previewOnly, props.contentType, variants.value] as const,
+    () => {
+        const fallback = fallbackImageCapableVariant(props.contentType, variants.value);
+        if (fallback) {
+            emit('update:contentType', fallback);
+        }
+    },
+    { immediate: true },
+);
 
 const pickVariant = (value: string) => {
     if (props.disabled) return;
@@ -187,6 +204,13 @@ const boardError = computed<string | undefined>(() => {
                         </ComboboxList>
                     </Combobox>
                     <InputError :message="boardError" />
+                    <p
+                        v-if="boardsTruncated"
+                        class="flex items-start gap-2 rounded-lg border-2 border-foreground/30 bg-foreground/5 p-2 text-xs font-semibold text-foreground/60"
+                    >
+                        <IconAlertTriangle class="mt-0.5 size-3.5 shrink-0" />
+                        {{ $t('posts.form.pinterest.boards_truncated') }}
+                    </p>
                 </template>
             </div>
 
diff --git a/resources/js/components/posts/editor/PostEditorTabs.vue b/resources/js/components/posts/editor/PostEditorTabs.vue
index c5ef75556..45ad8a6a4 100644
--- a/resources/js/components/posts/editor/PostEditorTabs.vue
+++ b/resources/js/components/posts/editor/PostEditorTabs.vue
@@ -5,7 +5,7 @@ import CommentsTab from '@/components/posts/editor/CommentsTab.vue';
 import PreviewTab from '@/components/posts/editor/PreviewTab.vue';
 import ScheduleTab from '@/components/posts/editor/ScheduleTab.vue';
 import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs';
-import type { PinterestBoard } from '@/types';
+import type { PinterestBoardsPayload } from '@/types';
 import type { MediaItem } from '@/types/media';
 
 interface SocialAccount {
@@ -62,7 +62,7 @@ const props = defineProps<{
     labels: { id: string; name: string; color: string }[];
     selectedLabelIds: string[];
     tiktokCreatorInfos?: Record<string, TikTokCreatorInfo> | null;
-    pinterestBoards?: Record<string, PinterestBoard[]> | null;
+    pinterestBoards?: Record<string, PinterestBoardsPayload> | null;
     isReadOnly: boolean;
     authUserId: string;
     initialHighlightCommentId: string | null;
diff --git a/resources/js/components/posts/editor/ScheduleTab.vue b/resources/js/components/posts/editor/ScheduleTab.vue
index 2bb93c235..f05e90f54 100644
--- a/resources/js/components/posts/editor/ScheduleTab.vue
+++ b/resources/js/components/posts/editor/ScheduleTab.vue
@@ -8,7 +8,7 @@ import { Badge } from '@/components/ui/badge';
 import { usePageErrors } from '@/composables/usePageErrors';
 import { getPlatformLogo } from '@/composables/usePlatformLogo';
 import { isVideo } from '@/lib/mediaType';
-import type { PinterestBoard } from '@/types';
+import type { PinterestBoard, PinterestBoardsPayload } from '@/types';
 import type { Channel } from '@/types/channel';
 import type { MediaItem } from '@/types/media';
 import { PostPlatformStatus } from '@/types/post';
@@ -77,7 +77,7 @@ const props = defineProps<{
     platformContentTypes: Record<string, string>;
     platformIssues?: Record<string, string>;
     tiktokCreatorInfos?: Record<string, TikTokCreatorInfo> | null;
-    pinterestBoards?: Record<string, PinterestBoard[]> | null;
+    pinterestBoards?: Record<string, PinterestBoardsPayload> | null;
     media?: MediaItem[];
 }>();
 
@@ -94,8 +94,14 @@ const getPublishConfig = (pp: PostPlatform): Record<string, any> | null =>
 const getCreatorInfo = (pp: PostPlatform): TikTokCreatorInfo | null =>
     pp.social_account_id ? props.tiktokCreatorInfos?.[pp.social_account_id] ?? null : null;
 
-const getBoards = (pp: PostPlatform): PinterestBoard[] =>
-    pp.social_account_id ? props.pinterestBoards?.[pp.social_account_id] ?? [] : [];
+const boardsPayload = (pp: PostPlatform): PinterestBoardsPayload =>
+    pp.social_account_id
+        ? props.pinterestBoards?.[pp.social_account_id] ?? { boards: [], truncated: false }
+        : { boards: [], truncated: false };
+
+const getBoards = (pp: PostPlatform): PinterestBoard[] => boardsPayload(pp).boards;
+
+const boardsTruncated = (pp: PostPlatform): boolean => boardsPayload(pp).truncated;
 
 const videoDurationSec = computed(() => {
     const video = props.media?.find((m) => isVideo(m));
@@ -143,6 +149,7 @@ const channels = computed<Channel[]>(() =>
         publishConfig: getPublishConfig(pp),
         creatorInfo: getCreatorInfo(pp),
         boards: getBoards(pp),
+        boardsTruncated: boardsTruncated(pp),
     })),
 );
 </script>
diff --git a/resources/js/components/posts/editor/TikTokSettings.vue b/resources/js/components/posts/editor/TikTokSettings.vue
index 2c794796c..68945b87b 100644
--- a/resources/js/components/posts/editor/TikTokSettings.vue
+++ b/resources/js/components/posts/editor/TikTokSettings.vue
@@ -16,6 +16,7 @@ import {
     SelectValue,
 } from '@/components/ui/select';
 import { getPlatformLogo } from '@/composables/usePlatformLogo';
+import { fallbackImageCapableVariant, filterImageCapableVariants } from '@/lib/aiGenerateVariants';
 import { ContentType } from '@/types/content-type';
 
 interface SocialAccount {
@@ -62,11 +63,24 @@ const emit = defineEmits<{
     'update:contentType': [value: string];
 }>();
 
-const variants = [
+const allVariants = [
     { value: ContentType.TikTokVideo, labelKey: 'posts.form.tiktok.variant.video' },
     { value: ContentType.TikTokPhoto, labelKey: 'posts.form.tiktok.variant.photo' },
 ] as const;
 
+const variants = computed(() => filterImageCapableVariants(allVariants, props.previewOnly));
+
+watch(
+    () => [props.previewOnly, props.contentType, variants.value] as const,
+    () => {
+        const fallback = fallbackImageCapableVariant(props.contentType, variants.value);
+        if (fallback) {
+            emit('update:contentType', fallback);
+        }
+    },
+    { immediate: true },
+);
+
 const pickVariant = (value: string) => {
     if (props.disabled) return;
     emit('update:contentType', value);
diff --git a/resources/js/composables/useMediaRules.ts b/resources/js/composables/useMediaRules.ts
index e8782d1e4..8f63d69c7 100644
--- a/resources/js/composables/useMediaRules.ts
+++ b/resources/js/composables/useMediaRules.ts
@@ -1,160 +1,39 @@
 import { computed, type Ref, type ComputedRef } from 'vue';
 
+import {
+    mediaRuleFor,
+    toMediaRules,
+    type MediaRules,
+} from '@/lib/contentTypeMediaRules';
 import { fromMimeType, MediaType } from '@/lib/mediaType';
 
-export interface MediaRules {
-    maxFiles: number;
-    minFiles?: number;
-    acceptImages: boolean;
-    acceptVideos: boolean;
-    acceptDocuments?: boolean;
-    requiresMedia: boolean;
-    acceptsGif: boolean;
-    forbidsMixedMedia?: boolean;
-    maxImageBytes?: number;
-    maxVideoBytes?: number;
-    maxDocumentBytes?: number;
-    maxVideoDurationSec?: number;
-    aspectRatioMin?: number;
-    aspectRatioMax?: number;
-    autoFitsImage?: boolean;
-}
-
-const MB = 1024 * 1024;
-const GB = 1024 * MB;
-
-const CONTENT_TYPE_RULES: Record<string, MediaRules> = {
-    // Instagram
-    instagram_feed: {
-        maxFiles: 10, acceptImages: true, acceptVideos: true, requiresMedia: true,
-        acceptsGif: false,
-        maxImageBytes: 8 * MB, maxVideoBytes: 100 * MB, maxVideoDurationSec: 60,
-        aspectRatioMin: 0.8, aspectRatioMax: 1.91,
-    },
-    instagram_reel: {
-        maxFiles: 1, acceptImages: false, acceptVideos: true, requiresMedia: true,
-        acceptsGif: false,
-        maxVideoBytes: 1 * GB, maxVideoDurationSec: 15 * 60,
-        aspectRatioMin: 0.5, aspectRatioMax: 0.6,
-    },
-    instagram_story: {
-        maxFiles: 1, acceptImages: true, acceptVideos: true, requiresMedia: true,
-        acceptsGif: false,
-        maxImageBytes: 8 * MB, maxVideoBytes: 100 * MB, maxVideoDurationSec: 60,
-        aspectRatioMin: 0.5, aspectRatioMax: 0.6, autoFitsImage: true,
-    },
-
-    // Facebook
-    facebook_post: {
-        maxFiles: 10, acceptImages: true, acceptVideos: true, requiresMedia: false,
-        acceptsGif: false,
-        maxImageBytes: 4 * MB, maxVideoBytes: 10 * GB, maxVideoDurationSec: 240 * 60,
-    },
-    facebook_reel: {
-        maxFiles: 1, acceptImages: false, acceptVideos: true, requiresMedia: true,
-        acceptsGif: false,
-        maxVideoBytes: 1 * GB, maxVideoDurationSec: 90,
-        aspectRatioMin: 0.5, aspectRatioMax: 0.6,
-    },
-    facebook_story: {
-        maxFiles: 1, acceptImages: false, acceptVideos: true, requiresMedia: true,
-        acceptsGif: false,
-        maxVideoBytes: 1 * GB, maxVideoDurationSec: 60,
-        aspectRatioMin: 0.5, aspectRatioMax: 0.6,
-    },
-
-    // LinkedIn — one type per account kind; the publish format (single image,
-    // multi-image, video, or PDF document) is inferred from the attached media.
-    // Images (up to 10) XOR one video XOR one PDF, never mixed.
-    linkedin_post: {
-        maxFiles: 10, acceptImages: true, acceptVideos: true, acceptDocuments: true,
-        requiresMedia: false, acceptsGif: false, forbidsMixedMedia: true,
-        maxImageBytes: 5 * MB, maxVideoBytes: 5 * GB, maxVideoDurationSec: 10 * 60, maxDocumentBytes: 100 * MB,
-    },
-    linkedin_page_post: {
-        maxFiles: 10, acceptImages: true, acceptVideos: true, acceptDocuments: true,
-        requiresMedia: false, acceptsGif: false, forbidsMixedMedia: true,
-        maxImageBytes: 5 * MB, maxVideoBytes: 5 * GB, maxVideoDurationSec: 10 * 60, maxDocumentBytes: 100 * MB,
-    },
-
-    // TikTok
-    tiktok_video: {
-        maxFiles: 1, acceptImages: false, acceptVideos: true, requiresMedia: true,
-        acceptsGif: false,
-        // maxVideoDurationSec is enforced dynamically via creator_info
-    },
-    tiktok_photo: {
-        maxFiles: 35, minFiles: 1, acceptImages: true, acceptVideos: false, requiresMedia: true,
-        acceptsGif: false,
-    },
-
-    // YouTube
-    youtube_short: {
-        maxFiles: 1, acceptImages: false, acceptVideos: true, requiresMedia: true,
-        acceptsGif: false,
-        maxVideoBytes: 256 * GB, maxVideoDurationSec: 3 * 60,
-        aspectRatioMin: 0.5, aspectRatioMax: 0.6,
-    },
-
-    // Pinterest
-    pinterest_pin: {
-        maxFiles: 1, acceptImages: true, acceptVideos: false, requiresMedia: true,
-        acceptsGif: false,
-        maxImageBytes: 20 * MB,
-    },
-    pinterest_video_pin: {
-        maxFiles: 1, acceptImages: false, acceptVideos: true, requiresMedia: true,
-        acceptsGif: false,
-        maxVideoBytes: 2 * GB, maxVideoDurationSec: 15 * 60,
-    },
-    pinterest_carousel: {
-        maxFiles: 5, minFiles: 2, acceptImages: true, acceptVideos: false, requiresMedia: true,
-        acceptsGif: false,
-        maxImageBytes: 20 * MB,
-    },
-
-    // X (Twitter) — accepts GIF with animation
-    x_post: {
-        maxFiles: 4, acceptImages: true, acceptVideos: true, requiresMedia: false,
-        acceptsGif: true,
-        maxImageBytes: 5 * MB, maxVideoBytes: 512 * MB, maxVideoDurationSec: 140,
-    },
-
-    // Threads
-    threads_post: {
-        maxFiles: 10, acceptImages: true, acceptVideos: true, requiresMedia: false,
-        acceptsGif: false,
-        maxImageBytes: 8 * MB, maxVideoBytes: 1 * GB, maxVideoDurationSec: 5 * 60,
-    },
-
-    // Bluesky — accepts GIF; tight image size (auto-resized by backend).
-    // The embed is images XOR video, so the two can't be combined in one post.
-    bluesky_post: {
-        maxFiles: 4, acceptImages: true, acceptVideos: true, requiresMedia: false,
-        acceptsGif: true, forbidsMixedMedia: true,
-        maxVideoBytes: 100 * MB, maxVideoDurationSec: 60,
-    },
-
-    // Mastodon — accepts GIF
-    mastodon_post: {
-        maxFiles: 4, acceptImages: true, acceptVideos: true, requiresMedia: false,
-        acceptsGif: true,
-        maxImageBytes: 10 * MB, maxVideoBytes: 40 * MB,
-    },
-};
+export type { MediaRules };
 
+/**
+ * Fallback only when Inertia once-props have not synced yet (or unknown type).
+ * Real limits live in App\Enums\PostPlatform\ContentType::mediaRules().
+ * Keep this fail-closed (no GIF) — most content types reject animated GIFs.
+ */
 const DEFAULT_RULES: MediaRules = {
     maxFiles: 10,
     acceptImages: true,
     acceptVideos: true,
     requiresMedia: false,
-    acceptsGif: true,
+    acceptsGif: false,
 };
 
-export function useMediaRules(contentType: Ref<string> | ComputedRef<string>) {
-    const rules = computed<MediaRules>(() => {
-        return CONTENT_TYPE_RULES[contentType.value] || DEFAULT_RULES;
-    });
+export const getMediaRulesForContentType = (contentType: string): MediaRules => {
+    const shared = mediaRuleFor(contentType);
+
+    if (!shared) {
+        return DEFAULT_RULES;
+    }
+
+    return toMediaRules(shared);
+};
+
+export const useMediaRules = (contentType: Ref<string> | ComputedRef<string>) => {
+    const rules = computed<MediaRules>(() => getMediaRulesForContentType(contentType.value));
 
     const acceptMimeTypes = computed<string>(() => {
         const types: string[] = [];
@@ -214,8 +93,4 @@ export function useMediaRules(contentType: Ref<string> | ComputedRef<string>) {
         isValidFileType,
         getAcceptDescription,
     };
-}
-
-export function getMediaRulesForContentType(contentType: string): MediaRules {
-    return CONTENT_TYPE_RULES[contentType] || DEFAULT_RULES;
-}
+};
diff --git a/resources/js/lib/aiGenerateVariants.ts b/resources/js/lib/aiGenerateVariants.ts
new file mode 100644
index 000000000..98e856ed6
--- /dev/null
+++ b/resources/js/lib/aiGenerateVariants.ts
@@ -0,0 +1,32 @@
+import { getMediaRulesForContentType } from '@/composables/useMediaRules';
+
+/**
+ * The automation Generate node (and AI wizard) only produce images. When
+ * `imageOnly` is true (previewOnly / generate context), drop video-only
+ * content types so they can't be selected.
+ */
+export const filterImageCapableVariants = <T extends { value: string }>(
+    variants: readonly T[],
+    imageOnly: boolean,
+): T[] => {
+    if (! imageOnly) {
+        return [...variants];
+    }
+
+    return variants.filter((variant) => getMediaRulesForContentType(variant.value).acceptImages);
+};
+
+/**
+ * When the current content type was filtered out (e.g. Video Pin in Generate),
+ * return the first remaining variant to switch to — or null when already valid.
+ */
+export const fallbackImageCapableVariant = (
+    contentType: string,
+    available: readonly { value: string }[],
+): string | null => {
+    if (available.some((variant) => variant.value === contentType)) {
+        return null;
+    }
+
+    return available[0]?.value ?? null;
+};
diff --git a/resources/js/lib/contentTypeMediaRules.ts b/resources/js/lib/contentTypeMediaRules.ts
new file mode 100644
index 000000000..dd771f660
--- /dev/null
+++ b/resources/js/lib/contentTypeMediaRules.ts
@@ -0,0 +1,109 @@
+import type { Page } from '@inertiajs/core';
+
+/** CamelCase shape consumed by the Vue media picker / compliance checks. */
+export type MediaRules = {
+    maxFiles: number;
+    minFiles?: number;
+    acceptImages: boolean;
+    acceptVideos: boolean;
+    acceptDocuments?: boolean;
+    requiresMedia: boolean;
+    acceptsGif: boolean;
+    forbidsMixedMedia?: boolean;
+    maxImageBytes?: number;
+    maxVideoBytes?: number;
+    maxDocumentBytes?: number;
+    maxVideoDurationSec?: number;
+    aspectRatioMin?: number;
+    aspectRatioMax?: number;
+    autoFitsImage?: boolean;
+};
+
+/**
+ * Snake_case payload from ContentType::mediaRules() / mediaRulesForFrontend().
+ */
+export type ContentTypeMediaRule = {
+    max_files: number;
+    min_files: number | null;
+    accept_images: boolean;
+    accept_videos: boolean;
+    accept_documents: boolean;
+    requires_media: boolean;
+    accepts_gif: boolean;
+    forbids_mixed_media: boolean;
+    max_image_bytes: number | null;
+    max_video_bytes: number | null;
+    max_document_bytes: number | null;
+    max_video_duration_sec: number | null;
+    aspect_ratio_min: number | null;
+    aspect_ratio_max: number | null;
+    auto_fits_image: boolean;
+};
+
+type ContentTypeMediaRulesMap = Record<string, ContentTypeMediaRule>;
+
+let cachedRules: ContentTypeMediaRulesMap | null = null;
+
+export const syncContentTypeMediaRules = (page: Page): void => {
+    const rules = page.props.contentTypeMediaRules as ContentTypeMediaRulesMap | undefined;
+
+    if (rules) {
+        cachedRules = rules;
+    }
+};
+
+export const mediaRuleFor = (contentType: string): ContentTypeMediaRule | undefined => {
+    return cachedRules?.[contentType];
+};
+
+export const toMediaRules = (rule: ContentTypeMediaRule): MediaRules => {
+    const mapped: MediaRules = {
+        maxFiles: rule.max_files,
+        acceptImages: rule.accept_images,
+        acceptVideos: rule.accept_videos,
+        requiresMedia: rule.requires_media,
+        acceptsGif: rule.accepts_gif,
+    };
+
+    if (rule.min_files !== null) {
+        mapped.minFiles = rule.min_files;
+    }
+
+    if (rule.accept_documents) {
+        mapped.acceptDocuments = true;
+    }
+
+    if (rule.forbids_mixed_media) {
+        mapped.forbidsMixedMedia = true;
+    }
+
+    if (rule.max_image_bytes !== null) {
+        mapped.maxImageBytes = rule.max_image_bytes;
+    }
+
+    if (rule.max_video_bytes !== null) {
+        mapped.maxVideoBytes = rule.max_video_bytes;
+    }
+
+    if (rule.max_document_bytes !== null) {
+        mapped.maxDocumentBytes = rule.max_document_bytes;
+    }
+
+    if (rule.max_video_duration_sec !== null) {
+        mapped.maxVideoDurationSec = rule.max_video_duration_sec;
+    }
+
+    if (rule.aspect_ratio_min !== null) {
+        mapped.aspectRatioMin = rule.aspect_ratio_min;
+    }
+
+    if (rule.aspect_ratio_max !== null) {
+        mapped.aspectRatioMax = rule.aspect_ratio_max;
+    }
+
+    if (rule.auto_fits_image) {
+        mapped.autoFitsImage = true;
+    }
+
+    return mapped;
+};
diff --git a/resources/js/pages/posts/Edit.vue b/resources/js/pages/posts/Edit.vue
index 2b6e2f3ca..667a43f01 100644
--- a/resources/js/pages/posts/Edit.vue
+++ b/resources/js/pages/posts/Edit.vue
@@ -25,7 +25,7 @@ import dayjs from '@/dayjs';
 import debounce from '@/debounce';
 import AppLayout from '@/layouts/AppLayout.vue';
 import { destroy as destroyPost, update as updatePost } from '@/routes/app/posts';
-import type { PinterestBoard } from '@/types';
+import type { PinterestBoardsPayload } from '@/types';
 import type { MediaItem } from '@/types/media';
 import { PostStatus } from '@/types/post';
 
@@ -86,7 +86,7 @@ const props = defineProps<{
     post: Post;
     socialAccounts: SocialAccount[];
     platformConfigs: Record<string, any>;
-    pinterestBoards: Record<string, PinterestBoard[]>;
+    pinterestBoards: Record<string, PinterestBoardsPayload>;
     tiktokCreatorInfos?: Record<string, TikTokCreatorInfo> | null;
     labels: { id: string; name: string; color: string }[];
     signatures: { id: string; name: string; content: string }[];
diff --git a/resources/js/ssr.ts b/resources/js/ssr.ts
index b57a46385..0c43b75eb 100644
--- a/resources/js/ssr.ts
+++ b/resources/js/ssr.ts
@@ -4,6 +4,8 @@ import { resolvePageComponent } from 'laravel-vite-plugin/inertia-helpers';
 import { createSSRApp, DefineComponent, h } from 'vue';
 import { renderToString } from 'vue/server-renderer';
 
+import { syncContentTypeMediaRules } from './lib/contentTypeMediaRules';
+
 const appName = import.meta.env.VITE_APP_NAME || 'Laravel';
 
 createServer(
@@ -17,8 +19,11 @@ createServer(
                     `./pages/${name}.vue`,
                     import.meta.glob<DefineComponent>('./pages/**/*.vue'),
                 ),
-            setup: ({ App, props, plugin }) =>
-                createSSRApp({ render: () => h(App, props) }).use(plugin),
+            setup: ({ App, props, plugin }) => {
+                syncContentTypeMediaRules(props.initialPage);
+
+                return createSSRApp({ render: () => h(App, props) }).use(plugin);
+            },
         }),
     { cluster: true },
 );
diff --git a/resources/js/types/channel.ts b/resources/js/types/channel.ts
index d2c58ebfa..81565fff7 100644
--- a/resources/js/types/channel.ts
+++ b/resources/js/types/channel.ts
@@ -40,4 +40,5 @@ export interface Channel {
     publishConfig?: Record<string, any> | null;
     creatorInfo?: ChannelTikTokCreatorInfo | null;
     boards?: PinterestBoard[];
+    boardsTruncated?: boolean;
 }
diff --git a/resources/js/types/index.d.ts b/resources/js/types/index.d.ts
index e95a50378..897ce048a 100644
--- a/resources/js/types/index.d.ts
+++ b/resources/js/types/index.d.ts
@@ -62,12 +62,31 @@ export interface NavItem {
     badge?: string;
 }
 
+export interface ContentTypeMediaRule {
+    max_files: number;
+    min_files: number | null;
+    accept_images: boolean;
+    accept_videos: boolean;
+    accept_documents: boolean;
+    requires_media: boolean;
+    accepts_gif: boolean;
+    forbids_mixed_media: boolean;
+    max_image_bytes: number | null;
+    max_video_bytes: number | null;
+    max_document_bytes: number | null;
+    max_video_duration_sec: number | null;
+    aspect_ratio_min: number | null;
+    aspect_ratio_max: number | null;
+    auto_fits_image: boolean;
+}
+
 export interface SharedData {
     name: string;
     auth: Auth;
     flash: FlashData;
     sidebarOpen: boolean;
     selfHosted: boolean;
+    contentTypeMediaRules?: Record<string, ContentTypeMediaRule>;
     [key: string]: unknown;
 }
 
@@ -97,6 +116,12 @@ export interface PinterestBoard {
     name: string;
 }
 
+/** Per-account payload from ListPinterestBoards (Inertia + API/MCP). */
+export interface PinterestBoardsPayload {
+    boards: PinterestBoard[];
+    truncated: boolean;
+}
+
 export interface ContentLanguageOption {
     value: string;
     label: string;
diff --git a/routes/api.php b/routes/api.php
index fe3c48f18..0ed1f0b72 100644
--- a/routes/api.php
+++ b/routes/api.php
@@ -13,8 +13,8 @@
 use Illuminate\Support\Facades\Route;
 
 Route::post('/uploads/{token}', [UploadController::class, 'store'])
-    ->middleware(['signed', 'throttle:10,1'])
-    ->where('token', '[0-9a-f-]{36}')
+    ->middleware(['signed', 'throttle:signed-uploads'])
+    ->whereUuid('token')
     ->name('api.uploads.store');
 
 Route::middleware(['auth:api', 'workspace.token', 'throttle:api'])->group(function () {
@@ -50,6 +50,12 @@
     // Social Accounts
     Route::get('/social-accounts', [SocialAccountController::class, 'index'])->name('api.social-accounts.index');
     Route::put('/social-accounts/{account}/toggle', [SocialAccountController::class, 'toggle'])->name('api.social-accounts.toggle');
+    Route::get('/social-accounts/{account}/boards', [SocialAccountController::class, 'boards'])
+        ->middleware('throttle:60,1')
+        ->name('api.social-accounts.boards');
+    Route::get('/social-accounts/{account}/channels', [SocialAccountController::class, 'channels'])
+        ->middleware('throttle:60,1')
+        ->name('api.social-accounts.channels');
 
     // API Keys
     Route::get('/api-keys', [ApiKeyController::class, 'index'])->name('api.api-keys.index');
diff --git a/tests/Feature/Api/DiscordChannelsApiTest.php b/tests/Feature/Api/DiscordChannelsApiTest.php
new file mode 100644
index 000000000..adefb1fd4
--- /dev/null
+++ b/tests/Feature/Api/DiscordChannelsApiTest.php
@@ -0,0 +1,94 @@
+<?php
+
+declare(strict_types=1);
+
+use App\Enums\SocialAccount\Platform;
+use App\Models\SocialAccount;
+use App\Models\Workspace;
+use Illuminate\Support\Facades\Cache;
+use Illuminate\Support\Facades\Http;
+
+beforeEach(function () {
+    Cache::flush();
+    config([
+        'trypost.platforms.discord.bot_token' => 'BOTTOKEN',
+        'services.discord.client_id' => '999000111',
+    ]);
+
+    $result = createApiTestToken();
+    $this->user = $result['user'];
+    $this->workspace = $result['workspace'];
+    $this->plainToken = $result['plain_token'];
+});
+
+it('lists discord channels for a connected account', function () {
+    $account = SocialAccount::factory()->discord()->create([
+        'workspace_id' => $this->workspace->id,
+        'platform_user_id' => '111222333',
+    ]);
+
+    Http::fake([
+        config('trypost.platforms.discord.api').'/guilds/111222333/channels' => Http::response([
+            ['id' => '1', 'name' => 'general', 'type' => 0],
+            ['id' => '2', 'name' => 'voice', 'type' => 2],
+            ['id' => '3', 'name' => 'news', 'type' => 5],
+        ], 200),
+        config('trypost.platforms.discord.api').'/guilds/111222333/roles' => Http::response([
+            ['id' => '111222333', 'name' => '@everyone', 'permissions' => '3072'],
+        ], 200),
+        config('trypost.platforms.discord.api').'/guilds/111222333/members/999000111' => Http::response(['roles' => []], 200),
+    ]);
+
+    $response = $this->getJson(route('api.social-accounts.channels', $account), [
+        'Authorization' => "Bearer {$this->plainToken}",
+    ]);
+
+    $response->assertOk();
+    $response->assertExactJson([
+        'channels' => [
+            ['id' => '1', 'name' => 'general'],
+            ['id' => '3', 'name' => 'news'],
+        ],
+    ]);
+});
+
+it('returns bad gateway when discord channel lookup fails', function () {
+    $account = SocialAccount::factory()->discord()->create([
+        'workspace_id' => $this->workspace->id,
+        'platform_user_id' => '111222333',
+    ]);
+
+    Http::fake([
+        config('trypost.platforms.discord.api').'/guilds/111222333/channels' => Http::response('upstream down', 500),
+    ]);
+
+    $this->getJson(route('api.social-accounts.channels', $account), [
+        'Authorization' => "Bearer {$this->plainToken}",
+    ])
+        ->assertStatus(502)
+        ->assertJsonPath('message', 'Discord channel lookup failed (500).');
+});
+
+it('rejects channels listing for non-discord accounts', function () {
+    $account = SocialAccount::factory()->create([
+        'workspace_id' => $this->workspace->id,
+        'platform' => Platform::LinkedIn,
+    ]);
+
+    $this->getJson(route('api.social-accounts.channels', $account), [
+        'Authorization' => "Bearer {$this->plainToken}",
+    ])
+        ->assertUnprocessable()
+        ->assertJsonPath('message', 'Channels are only available for Discord accounts.');
+});
+
+it('cannot list channels for an account from another workspace', function () {
+    $otherWorkspace = Workspace::factory()->create();
+    $account = SocialAccount::factory()->discord()->create([
+        'workspace_id' => $otherWorkspace->id,
+    ]);
+
+    $this->getJson(route('api.social-accounts.channels', $account), [
+        'Authorization' => "Bearer {$this->plainToken}",
+    ])->assertNotFound();
+});
diff --git a/tests/Feature/Api/PinterestBoardsApiTest.php b/tests/Feature/Api/PinterestBoardsApiTest.php
new file mode 100644
index 000000000..db7fbf706
--- /dev/null
+++ b/tests/Feature/Api/PinterestBoardsApiTest.php
@@ -0,0 +1,137 @@
+<?php
+
+declare(strict_types=1);
+
+use App\Enums\SocialAccount\Platform;
+use App\Models\SocialAccount;
+use App\Models\Workspace;
+use Illuminate\Support\Facades\Http;
+
+beforeEach(function () {
+    $result = createApiTestToken();
+    $this->user = $result['user'];
+    $this->workspace = $result['workspace'];
+    $this->plainToken = $result['plain_token'];
+});
+
+it('lists pinterest boards for a connected account', function () {
+    $account = SocialAccount::factory()->pinterest()->create([
+        'workspace_id' => $this->workspace->id,
+        'access_token' => 'pinterest-token',
+    ]);
+
+    Http::fake([
+        config('trypost.platforms.pinterest.api').'/boards*' => Http::response([
+            'items' => [
+                ['id' => 'board_1', 'name' => 'Ideas', 'privacy' => 'PUBLIC'],
+                ['id' => 'board_2', 'name' => 'Product', 'privacy' => 'PUBLIC'],
+            ],
+        ], 200),
+    ]);
+
+    $response = $this->getJson(route('api.social-accounts.boards', $account), [
+        'Authorization' => "Bearer {$this->plainToken}",
+    ]);
+
+    $response->assertOk();
+    $response->assertExactJson([
+        'boards' => [
+            ['id' => 'board_1', 'name' => 'Ideas'],
+            ['id' => 'board_2', 'name' => 'Product'],
+        ],
+        'truncated' => false,
+    ]);
+});
+
+it('returns an empty boards list when pinterest has none', function () {
+    $account = SocialAccount::factory()->pinterest()->create([
+        'workspace_id' => $this->workspace->id,
+        'access_token' => 'pinterest-token',
+    ]);
+
+    Http::fake([
+        config('trypost.platforms.pinterest.api').'/boards*' => Http::response([
+            'items' => [],
+        ], 200),
+    ]);
+
+    $this->getJson(route('api.social-accounts.boards', $account), [
+        'Authorization' => "Bearer {$this->plainToken}",
+    ])
+        ->assertOk()
+        ->assertExactJson(['boards' => [], 'truncated' => false]);
+});
+
+it('returns unauthorized when the pinterest token is expired', function () {
+    $account = SocialAccount::factory()->pinterest()->create([
+        'workspace_id' => $this->workspace->id,
+        'access_token' => 'expired-token',
+    ]);
+
+    Http::fake([
+        config('trypost.platforms.pinterest.api').'/boards*' => Http::response([
+            'message' => 'Access token has expired or been revoked',
+        ], 401),
+    ]);
+
+    $this->getJson(route('api.social-accounts.boards', $account), [
+        'Authorization' => "Bearer {$this->plainToken}",
+    ])
+        ->assertUnauthorized()
+        ->assertJsonPath('message', 'Access token has expired or been revoked');
+});
+
+it('returns bad gateway when pinterest is unavailable', function () {
+    $account = SocialAccount::factory()->pinterest()->create([
+        'workspace_id' => $this->workspace->id,
+        'access_token' => 'pinterest-token',
+    ]);
+
+    Http::fake([
+        config('trypost.platforms.pinterest.api').'/boards*' => Http::response([
+            'message' => 'Internal error',
+        ], 500),
+    ]);
+
+    $this->getJson(route('api.social-accounts.boards', $account), [
+        'Authorization' => "Bearer {$this->plainToken}",
+    ])
+        ->assertStatus(502)
+        ->assertJsonPath('message', 'Pinterest server error. Please try again.');
+});
+
+it('rejects boards listing for non-pinterest accounts', function () {
+    $account = SocialAccount::factory()->create([
+        'workspace_id' => $this->workspace->id,
+        'platform' => Platform::LinkedIn,
+    ]);
+
+    $response = $this->getJson(route('api.social-accounts.boards', $account), [
+        'Authorization' => "Bearer {$this->plainToken}",
+    ]);
+
+    $response->assertUnprocessable();
+    $response->assertJsonPath('message', 'Boards are only available for Pinterest accounts.');
+});
+
+it('cannot list boards for an account from another workspace', function () {
+    $otherWorkspace = Workspace::factory()->create();
+    $account = SocialAccount::factory()->pinterest()->create([
+        'workspace_id' => $otherWorkspace->id,
+    ]);
+
+    $response = $this->getJson(route('api.social-accounts.boards', $account), [
+        'Authorization' => "Bearer {$this->plainToken}",
+    ]);
+
+    $response->assertNotFound();
+});
+
+it('requires authentication to list boards', function () {
+    $account = SocialAccount::factory()->pinterest()->create([
+        'workspace_id' => $this->workspace->id,
+    ]);
+
+    $this->getJson(route('api.social-accounts.boards', $account))
+        ->assertUnauthorized();
+});
diff --git a/tests/Feature/Api/PlatformApiTest.php b/tests/Feature/Api/PlatformApiTest.php
index 204253c6e..16d43b50b 100644
--- a/tests/Feature/Api/PlatformApiTest.php
+++ b/tests/Feature/Api/PlatformApiTest.php
@@ -10,7 +10,7 @@
 });
 
 it('lists content types per platform', function () {
-    $this->withHeaders(['Authorization' => 'Bearer '.$this->plainToken])
+    $response = $this->withHeaders(['Authorization' => 'Bearer '.$this->plainToken])
         ->getJson(route('api.content-types'))
         ->assertOk()
         ->assertJsonStructure([
@@ -23,11 +23,39 @@
                     'allowed_media_types',
                     'default_content_type',
                     'content_types' => [
-                        '*' => ['value', 'label', 'description', 'max_media_count', 'requires_media'],
+                        '*' => [
+                            'value',
+                            'label',
+                            'description',
+                            'max_media_count',
+                            'min_media_count',
+                            'requires_media',
+                            'accept_images',
+                            'accept_videos',
+                            'accept_documents',
+                            'accepts_gif',
+                            'forbids_mixed_media',
+                            'max_video_duration_sec',
+                            'max_image_bytes',
+                            'max_video_bytes',
+                            'max_document_bytes',
+                        ],
                     ],
                 ],
             ],
         ]);
+
+    $platforms = collect($response->json('platforms'));
+    $instagramTypes = collect($platforms->firstWhere('platform', 'instagram')['content_types']);
+    $facebookTypes = collect($platforms->firstWhere('platform', 'facebook')['content_types']);
+    $pinterestTypes = collect($platforms->firstWhere('platform', 'pinterest')['content_types']);
+
+    expect($instagramTypes->firstWhere('value', 'instagram_reel')['max_video_duration_sec'])->toBe(900);
+    expect($instagramTypes->firstWhere('value', 'instagram_reel')['max_video_bytes'])->toBe(1 * 1024 * 1024 * 1024);
+    expect($instagramTypes->firstWhere('value', 'instagram_reel')['accept_images'])->toBeFalse();
+    expect($facebookTypes->firstWhere('value', 'facebook_reel')['max_video_duration_sec'])->toBe(90);
+    expect($pinterestTypes->firstWhere('value', 'pinterest_carousel')['min_media_count'])->toBe(2);
+    expect($pinterestTypes->firstWhere('value', 'pinterest_pin')['min_media_count'])->toBe(0);
 });
 
 it('rejects content-types without auth', function () {
diff --git a/tests/Feature/Api/UploadControllerTest.php b/tests/Feature/Api/UploadControllerTest.php
index ac69900e9..dc8e66e4f 100644
--- a/tests/Feature/Api/UploadControllerTest.php
+++ b/tests/Feature/Api/UploadControllerTest.php
@@ -8,6 +8,7 @@
 use App\Models\Workspace;
 use Illuminate\Http\UploadedFile;
 use Illuminate\Support\Facades\Cache;
+use Illuminate\Support\Facades\DB;
 use Illuminate\Support\Facades\Storage;
 use Illuminate\Support\Facades\URL;
 use Illuminate\Support\Str;
@@ -102,9 +103,26 @@ function signedUploadUrl(Workspace $ws, string $token, ?int $expiresInMinutes =
     expect(Media::where('upload_token', $token)->count())->toBe(1);
 });
 
-test('rejects file larger than 50MB', function () {
+test('rejects file larger than the per-type media cap', function () {
+    config(['trypost.media.max_size_mb.video' => 1]);
+
+    $token = (string) Str::uuid();
+    $file = UploadedFile::fake()->create('huge.mp4', 1024 + 1, 'video/mp4');
+
+    $response = $this->postJson(signedUploadUrl($this->workspace, $token), ['media' => $file]);
+
+    $response->assertStatus(422);
+    expect(Media::where('upload_token', $token)->exists())->toBeFalse();
+});
+
+test('rejects an image larger than the image media cap even when under the video ceiling', function () {
+    config([
+        'trypost.media.max_size_mb.image' => 1,
+        'trypost.media.max_size_mb.video' => 1024,
+    ]);
+
     $token = (string) Str::uuid();
-    $file = UploadedFile::fake()->create('huge.mp4', 51 * 1024 + 1, 'video/mp4');
+    $file = UploadedFile::fake()->create('big.jpg', 1024 + 1, 'image/jpeg');
 
     $response = $this->postJson(signedUploadUrl($this->workspace, $token), ['media' => $file]);
 
@@ -112,6 +130,52 @@ function signedUploadUrl(Workspace $ws, string $token, ?int $expiresInMinutes =
     expect(Media::where('upload_token', $token)->exists())->toBeFalse();
 });
 
+test('rejects a document larger than the document media cap even when under the video ceiling', function () {
+    config([
+        'trypost.media.max_size_mb.document' => 1,
+        'trypost.media.max_size_mb.video' => 1024,
+    ]);
+
+    $token = (string) Str::uuid();
+    $file = UploadedFile::fake()->create('big.pdf', 1024 + 1, 'application/pdf');
+
+    $response = $this->postJson(signedUploadUrl($this->workspace, $token), ['media' => $file]);
+
+    $response->assertStatus(422);
+    expect(Media::where('upload_token', $token)->exists())->toBeFalse();
+});
+
+test('stores a video upload via the streaming path', function () {
+    $token = (string) Str::uuid();
+    $file = UploadedFile::fake()->create('clip.mp4', 256, 'video/mp4');
+
+    $this->post(signedUploadUrl($this->workspace, $token), [
+        'media' => $file,
+    ])->assertCreated();
+
+    $media = Media::where('upload_token', $token)->first();
+    expect($media)->not->toBeNull()
+        ->and($media->type->value)->toBe('video')
+        ->and(Storage::exists($media->path))->toBeTrue();
+});
+
+test('releases the upload token when media persistence fails', function () {
+    $token = (string) Str::uuid();
+    $file = UploadedFile::fake()->create('clip.mp4', 256, 'video/mp4');
+    $cacheKey = "media:signed-upload:{$token}";
+
+    DB::shouldReceive('transaction')
+        ->once()
+        ->andThrow(new RuntimeException('disk unavailable'));
+
+    $this->postJson(signedUploadUrl($this->workspace, $token), [
+        'media' => $file,
+    ])->assertServerError();
+
+    expect(Cache::has($cacheKey))->toBeFalse()
+        ->and(Media::where('upload_token', $token)->exists())->toBeFalse();
+});
+
 test('rejects disallowed mime type', function () {
     $token = (string) Str::uuid();
     $file = UploadedFile::fake()->create('evil.exe', 10, 'application/octet-stream');
@@ -122,18 +186,37 @@ function signedUploadUrl(Workspace $ws, string $token, ?int $expiresInMinutes =
     expect(Media::where('upload_token', $token)->exists())->toBeFalse();
 });
 
-test('rate limits floods from the same IP', function () {
-    for ($i = 0; $i < 10; $i++) {
+test('rate limits floods from the same workspace', function () {
+    for ($i = 0; $i < 60; $i++) {
         $this->postJson(
             signedUploadUrl($this->workspace, (string) Str::uuid()),
             ['media' => UploadedFile::fake()->image("f{$i}.png", 16, 16)],
-        );
+        )->assertSuccessful();
     }
 
-    $response = $this->postJson(
+    $this->postJson(
         signedUploadUrl($this->workspace, (string) Str::uuid()),
         ['media' => UploadedFile::fake()->image('over.png', 16, 16)],
-    );
+    )->assertStatus(429);
+});
+
+test('different workspaces on the same IP do not share the upload rate limit', function () {
+    $otherWorkspace = Workspace::factory()->create();
+
+    for ($i = 0; $i < 60; $i++) {
+        $this->postJson(
+            signedUploadUrl($this->workspace, (string) Str::uuid()),
+            ['media' => UploadedFile::fake()->image("a{$i}.png", 16, 16)],
+        )->assertSuccessful();
+    }
+
+    $this->postJson(
+        signedUploadUrl($this->workspace, (string) Str::uuid()),
+        ['media' => UploadedFile::fake()->image('blocked.png', 16, 16)],
+    )->assertStatus(429);
 
-    $response->assertStatus(429);
+    $this->postJson(
+        signedUploadUrl($otherWorkspace, (string) Str::uuid()),
+        ['media' => UploadedFile::fake()->image('other.png', 16, 16)],
+    )->assertSuccessful();
 });
diff --git a/tests/Feature/Automation/Automation/ReadActionsTest.php b/tests/Feature/Automation/Automation/ReadActionsTest.php
index dd9675057..d4d778561 100644
--- a/tests/Feature/Automation/Automation/ReadActionsTest.php
+++ b/tests/Feature/Automation/Automation/ReadActionsTest.php
@@ -135,7 +135,10 @@
 });
 
 it('maps pinterest boards for pinterest accounts', function () {
-    $this->mock(PinterestPublisher::class, fn ($mock) => $mock->shouldReceive('getBoards')->andReturn([['id' => 'b1']]));
+    $this->mock(PinterestPublisher::class, fn ($mock) => $mock->shouldReceive('getBoards')->andReturn([
+        'boards' => [['id' => 'b1', 'name' => 'Ideas']],
+        'truncated' => true,
+    ]));
     $this->mock(TikTokCreatorInfo::class);
 
     $workspace = Workspace::factory()->create();
@@ -144,5 +147,8 @@
 
     $result = app(GetAutomationEditorData::class)($automation);
 
-    expect($result['pinterestBoards']->get($pinterest->id))->toBe([['id' => 'b1']]);
+    expect($result['pinterestBoards']->get($pinterest->id))->toBe([
+        'boards' => [['id' => 'b1', 'name' => 'Ideas']],
+        'truncated' => true,
+    ]);
 });
diff --git a/tests/Feature/Automation/GenerateNodeValidationTest.php b/tests/Feature/Automation/GenerateNodeValidationTest.php
index 097662c6a..295bee900 100644
--- a/tests/Feature/Automation/GenerateNodeValidationTest.php
+++ b/tests/Feature/Automation/GenerateNodeValidationTest.php
@@ -37,6 +37,25 @@
         ->assertJsonValidationErrors(['nodes.1.data.accounts']);
 });
 
+it('rejects a generate node that targets Pinterest carousel below the minimum slide count', function () {
+    $automation = Automation::factory()->for($this->workspace)->create();
+
+    $this->actingAs($this->user)
+        ->putJson(route('app.automations.update', $automation->id), [
+            'nodes' => [
+                ['id' => 'n1', 'type' => 'trigger', 'position' => ['x' => 0, 'y' => 0], 'data' => ['trigger_type' => 'schedule', 'cron' => '0 9 * * *']],
+                ['id' => 'n2', 'type' => 'generate', 'position' => ['x' => 1, 'y' => 0], 'data' => [
+                    'accounts' => [['social_account_id' => 'acc-1', 'content_type' => 'pinterest_carousel', 'meta' => ['board_id' => 'board-1']]],
+                    'prompt_template' => 'hi',
+                    'target_slide_count' => 1,
+                ]],
+            ],
+            'connections' => [['id' => 'e1', 'source' => 'n1', 'target' => 'n2']],
+        ])
+        ->assertStatus(422)
+        ->assertJsonValidationErrors(['nodes.1.data.accounts']);
+});
+
 it('allows saving a generate node within the content type limit', function () {
     $automation = Automation::factory()->for($this->workspace)->create();
 
@@ -58,6 +77,66 @@
     expect($automation->fresh()->nodes)->toHaveCount(2);
 });
 
+it('rejects a generate node that targets Pinterest with zero images', function () {
+    $automation = Automation::factory()->for($this->workspace)->create();
+
+    $this->actingAs($this->user)
+        ->putJson(route('app.automations.update', $automation->id), [
+            'nodes' => [
+                ['id' => 'n1', 'type' => 'trigger', 'position' => ['x' => 0, 'y' => 0], 'data' => ['trigger_type' => 'schedule', 'cron' => '0 9 * * *']],
+                ['id' => 'n2', 'type' => 'generate', 'position' => ['x' => 1, 'y' => 0], 'data' => [
+                    'accounts' => [['social_account_id' => 'acc-1', 'content_type' => 'pinterest_pin', 'meta' => ['board_id' => 'board-1']]],
+                    'prompt_template' => 'hi',
+                    'target_slide_count' => 0,
+                ]],
+            ],
+            'connections' => [['id' => 'e1', 'source' => 'n1', 'target' => 'n2']],
+        ])
+        ->assertStatus(422)
+        ->assertJsonValidationErrors(['nodes.1.data.accounts']);
+});
+
+it('rejects a generate node that targets a video-only Pinterest format', function () {
+    $automation = Automation::factory()->for($this->workspace)->create();
+
+    $this->actingAs($this->user)
+        ->putJson(route('app.automations.update', $automation->id), [
+            'nodes' => [
+                ['id' => 'n1', 'type' => 'trigger', 'position' => ['x' => 0, 'y' => 0], 'data' => ['trigger_type' => 'schedule', 'cron' => '0 9 * * *']],
+                ['id' => 'n2', 'type' => 'generate', 'position' => ['x' => 1, 'y' => 0], 'data' => [
+                    'accounts' => [['social_account_id' => 'acc-1', 'content_type' => 'pinterest_video_pin', 'meta' => ['board_id' => 'board-1']]],
+                    'prompt_template' => 'hi',
+                    'target_slide_count' => 1,
+                ]],
+            ],
+            'connections' => [['id' => 'e1', 'source' => 'n1', 'target' => 'n2']],
+        ])
+        ->assertStatus(422)
+        ->assertJsonValidationErrors(['nodes.1.data.accounts']);
+});
+
+it('allows saving a Pinterest pin generate node with one image', function () {
+    $automation = Automation::factory()->for($this->workspace)->create();
+
+    $this->actingAs($this->user)
+        ->put(route('app.automations.update', $automation->id), [
+            'nodes' => [
+                ['id' => 'n1', 'type' => 'trigger', 'position' => ['x' => 0, 'y' => 0], 'data' => ['trigger_type' => 'schedule', 'cron' => '0 9 * * *']],
+                ['id' => 'n2', 'type' => 'generate', 'position' => ['x' => 1, 'y' => 0], 'data' => [
+                    'accounts' => [['social_account_id' => 'acc-1', 'content_type' => 'pinterest_pin', 'meta' => ['board_id' => 'board-1']]],
+                    'prompt_template' => 'hi',
+                    'target_slide_count' => 1,
+                    'style' => 'tweet_card',
+                ]],
+            ],
+            'connections' => [['id' => 'e1', 'source' => 'n1', 'target' => 'n2']],
+        ])
+        ->assertRedirect()
+        ->assertSessionHasNoErrors();
+
+    expect($automation->fresh()->nodes)->toHaveCount(2);
+});
+
 it('persists the brand toggles on the generate node', function () {
     $automation = Automation::factory()->for($this->workspace)->create();
 
diff --git a/tests/Feature/ContentTypeMediaRulesShareTest.php b/tests/Feature/ContentTypeMediaRulesShareTest.php
new file mode 100644
index 000000000..db38a8fa3
--- /dev/null
+++ b/tests/Feature/ContentTypeMediaRulesShareTest.php
@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+
+use App\Enums\UserWorkspace\Role;
+use App\Models\User;
+use App\Models\Workspace;
+use Inertia\Testing\AssertableInertia;
+
+beforeEach(function () {
+    $this->user = User::factory()->create();
+    $this->workspace = Workspace::factory()->create(['user_id' => $this->user->id]);
+    $this->workspace->members()->attach($this->user->id, ['role' => Role::Member->value]);
+    $this->user->update(['current_workspace_id' => $this->workspace->id]);
+});
+
+test('inertia shares content type media rules for the frontend', function () {
+    $this->actingAs($this->user)
+        ->get(route('app.posts.index'))
+        ->assertOk()
+        ->assertInertia(fn (AssertableInertia $page) => $page
+            ->has('contentTypeMediaRules')
+            ->where('contentTypeMediaRules.instagram_reel.max_video_duration_sec', 900)
+            ->where('contentTypeMediaRules.instagram_reel.max_video_bytes', 1 * 1024 * 1024 * 1024)
+            ->where('contentTypeMediaRules.instagram_reel.accept_images', false)
+            ->where('contentTypeMediaRules.instagram_feed.requires_media', true)
+            ->where('contentTypeMediaRules.discord_message.accepts_gif', true)
+            ->where('contentTypeMediaRules.facebook_reel.max_video_duration_sec', 90)
+            ->where('contentTypeMediaRules.tiktok_video.max_video_duration_sec', null)
+            ->where('contentTypeMediaRules.linkedin_post.max_document_bytes', 100 * 1024 * 1024)
+        );
+});
diff --git a/tests/Feature/Mcp/ListDiscordChannelsToolTest.php b/tests/Feature/Mcp/ListDiscordChannelsToolTest.php
new file mode 100644
index 000000000..c4c6d4241
--- /dev/null
+++ b/tests/Feature/Mcp/ListDiscordChannelsToolTest.php
@@ -0,0 +1,95 @@
+<?php
+
+declare(strict_types=1);
+
+use App\Enums\SocialAccount\Platform;
+use App\Enums\UserWorkspace\Role;
+use App\Mcp\Servers\TryPostServer;
+use App\Mcp\Tools\SocialAccount\ListDiscordChannelsTool;
+use App\Models\SocialAccount;
+use App\Models\User;
+use App\Models\Workspace;
+use Illuminate\Support\Facades\Cache;
+use Illuminate\Support\Facades\Http;
+use Illuminate\Testing\Fluent\AssertableJson;
+
+beforeEach(function () {
+    Cache::flush();
+    config([
+        'trypost.platforms.discord.bot_token' => 'BOTTOKEN',
+        'services.discord.client_id' => '999000111',
+    ]);
+
+    $this->user = User::factory()->create();
+    $this->workspace = Workspace::factory()->create(['user_id' => $this->user->id]);
+    $this->workspace->members()->attach($this->user->id, ['role' => Role::Member->value]);
+    $this->user->update(['current_workspace_id' => $this->workspace->id]);
+});
+
+test('lists discord channels as id and name', function () {
+    $account = SocialAccount::factory()->discord()->create([
+        'workspace_id' => $this->workspace->id,
+        'platform_user_id' => '111222333',
+    ]);
+
+    Http::fake([
+        config('trypost.platforms.discord.api').'/guilds/111222333/channels' => Http::response([
+            ['id' => '1', 'name' => 'general', 'type' => 0],
+            ['id' => '2', 'name' => 'voice', 'type' => 2],
+        ], 200),
+        config('trypost.platforms.discord.api').'/guilds/111222333/roles' => Http::response([
+            ['id' => '111222333', 'name' => '@everyone', 'permissions' => '3072'],
+        ], 200),
+        config('trypost.platforms.discord.api').'/guilds/111222333/members/999000111' => Http::response(['roles' => []], 200),
+    ]);
+
+    $response = TryPostServer::actingAs($this->user)
+        ->tool(ListDiscordChannelsTool::class, ['account_id' => $account->id]);
+
+    $response->assertOk()
+        ->assertStructuredContent(function (AssertableJson $json) {
+            $json->has('channels', 1)
+                ->where('channels.0.id', '1')
+                ->where('channels.0.name', 'general');
+        });
+});
+
+test('returns an actionable error when discord is unavailable', function () {
+    $account = SocialAccount::factory()->discord()->create([
+        'workspace_id' => $this->workspace->id,
+        'platform_user_id' => '111222333',
+    ]);
+
+    Http::fake([
+        config('trypost.platforms.discord.api').'/guilds/111222333/channels' => Http::response('upstream down', 500),
+    ]);
+
+    $response = TryPostServer::actingAs($this->user)
+        ->tool(ListDiscordChannelsTool::class, ['account_id' => $account->id]);
+
+    $response->assertHasErrors(['Discord channel lookup failed (500).']);
+});
+
+test('rejects non-discord accounts', function () {
+    $account = SocialAccount::factory()->create([
+        'workspace_id' => $this->workspace->id,
+        'platform' => Platform::LinkedIn,
+    ]);
+
+    $response = TryPostServer::actingAs($this->user)
+        ->tool(ListDiscordChannelsTool::class, ['account_id' => $account->id]);
+
+    $response->assertHasErrors(['This tool only works with Discord social accounts.']);
+});
+
+test('cannot list channels for another workspace account', function () {
+    $otherWorkspace = Workspace::factory()->create();
+    $account = SocialAccount::factory()->discord()->create([
+        'workspace_id' => $otherWorkspace->id,
+    ]);
+
+    $response = TryPostServer::actingAs($this->user)
+        ->tool(ListDiscordChannelsTool::class, ['account_id' => $account->id]);
+
+    $response->assertHasErrors(['Social account not found.']);
+});
diff --git a/tests/Feature/Mcp/ListPinterestBoardsToolTest.php b/tests/Feature/Mcp/ListPinterestBoardsToolTest.php
new file mode 100644
index 000000000..7f7575e7f
--- /dev/null
+++ b/tests/Feature/Mcp/ListPinterestBoardsToolTest.php
@@ -0,0 +1,98 @@
+<?php
+
+declare(strict_types=1);
+
+use App\Enums\SocialAccount\Platform;
+use App\Enums\UserWorkspace\Role;
+use App\Mcp\Servers\TryPostServer;
+use App\Mcp\Tools\SocialAccount\ListPinterestBoardsTool;
+use App\Models\SocialAccount;
+use App\Models\User;
+use App\Models\Workspace;
+use Illuminate\Support\Facades\Http;
+use Illuminate\Testing\Fluent\AssertableJson;
+
+beforeEach(function () {
+    $this->user = User::factory()->create();
+    $this->workspace = Workspace::factory()->create(['user_id' => $this->user->id]);
+    $this->workspace->members()->attach($this->user->id, ['role' => Role::Member->value]);
+    $this->user->update(['current_workspace_id' => $this->workspace->id]);
+});
+
+test('lists pinterest boards as id and name', function () {
+    $account = SocialAccount::factory()->pinterest()->create([
+        'workspace_id' => $this->workspace->id,
+        'access_token' => 'pinterest-token',
+    ]);
+
+    Http::fake([
+        config('trypost.platforms.pinterest.api').'/boards*' => Http::response([
+            'items' => [
+                ['id' => 'board_1', 'name' => 'Ideas', 'privacy' => 'PUBLIC'],
+                ['id' => 'board_2', 'name' => 'Product'],
+            ],
+        ], 200),
+    ]);
+
+    $response = TryPostServer::actingAs($this->user)
+        ->tool(ListPinterestBoardsTool::class, ['account_id' => $account->id]);
+
+    $response->assertOk()
+        ->assertStructuredContent(function (AssertableJson $json) {
+            $json->has('boards', 2)
+                ->where('boards.0.id', 'board_1')
+                ->where('boards.0.name', 'Ideas')
+                ->where('boards.1.id', 'board_2')
+                ->where('boards.1.name', 'Product')
+                ->where('truncated', false);
+        });
+});
+
+test('returns an actionable error when pinterest token is expired', function () {
+    $account = SocialAccount::factory()->pinterest()->create([
+        'workspace_id' => $this->workspace->id,
+        'access_token' => 'expired-token',
+    ]);
+
+    Http::fake([
+        config('trypost.platforms.pinterest.api').'/boards*' => Http::response([
+            'message' => 'Access token has expired or been revoked',
+        ], 401),
+    ]);
+
+    $response = TryPostServer::actingAs($this->user)
+        ->tool(ListPinterestBoardsTool::class, ['account_id' => $account->id]);
+
+    $response->assertHasErrors(['Access token has expired or been revoked']);
+});
+
+test('rejects non-pinterest accounts', function () {
+    $account = SocialAccount::factory()->create([
+        'workspace_id' => $this->workspace->id,
+        'platform' => Platform::LinkedIn,
+    ]);
+
+    $response = TryPostServer::actingAs($this->user)
+        ->tool(ListPinterestBoardsTool::class, ['account_id' => $account->id]);
+
+    $response->assertHasErrors(['This tool only works with Pinterest social accounts.']);
+});
+
+test('cannot list boards for another workspace account', function () {
+    $otherWorkspace = Workspace::factory()->create();
+    $account = SocialAccount::factory()->pinterest()->create([
+        'workspace_id' => $otherWorkspace->id,
+    ]);
+
+    $response = TryPostServer::actingAs($this->user)
+        ->tool(ListPinterestBoardsTool::class, ['account_id' => $account->id]);
+
+    $response->assertHasErrors(['Social account not found.']);
+});
+
+test('validates account_id is required', function () {
+    $response = TryPostServer::actingAs($this->user)
+        ->tool(ListPinterestBoardsTool::class, []);
+
+    $response->assertHasErrors();
+});
diff --git a/tests/Feature/Mcp/PlatformToolTest.php b/tests/Feature/Mcp/PlatformToolTest.php
index e603f7cf2..d5f3a7951 100644
--- a/tests/Feature/Mcp/PlatformToolTest.php
+++ b/tests/Feature/Mcp/PlatformToolTest.php
@@ -33,6 +33,27 @@
                         'default_content_type',
                         'content_types',
                     ])
+                    ->has('content_types', fn (AssertableJson $types) => $types
+                        ->each(fn (AssertableJson $type) => $type
+                            ->hasAll([
+                                'value',
+                                'label',
+                                'description',
+                                'max_media_count',
+                                'min_media_count',
+                                'requires_media',
+                                'accept_images',
+                                'accept_videos',
+                                'accept_documents',
+                                'accepts_gif',
+                                'forbids_mixed_media',
+                                'max_video_duration_sec',
+                                'max_image_bytes',
+                                'max_video_bytes',
+                                'max_document_bytes',
+                            ])
+                        )
+                    )
                 )
             );
         });
@@ -45,3 +66,23 @@
     $response->assertOk()
         ->assertSee(['linkedin', 'linkedin_post', 'x_post', 'instagram_feed', 'mastodon_post']);
 });
+
+test('list content types exposes reel max video durations', function () {
+    $response = TryPostServer::actingAs($this->user)
+        ->tool(ListContentTypesTool::class, []);
+
+    $response->assertOk()
+        ->assertStructuredContent(function (AssertableJson $json) {
+            $json->etc();
+
+            $platforms = collect($json->toArray()['platforms']);
+            $instagramTypes = collect($platforms->firstWhere('platform', 'instagram')['content_types']);
+            $facebookTypes = collect($platforms->firstWhere('platform', 'facebook')['content_types']);
+            $pinterestTypes = collect($platforms->firstWhere('platform', 'pinterest')['content_types']);
+
+            expect($instagramTypes->firstWhere('value', 'instagram_reel')['max_video_duration_sec'])->toBe(900);
+            expect($instagramTypes->firstWhere('value', 'instagram_reel')['max_video_bytes'])->toBe(1 * 1024 * 1024 * 1024);
+            expect($facebookTypes->firstWhere('value', 'facebook_reel')['max_video_duration_sec'])->toBe(90);
+            expect($pinterestTypes->firstWhere('value', 'pinterest_carousel')['min_media_count'])->toBe(2);
+        });
+});
diff --git a/tests/Feature/Mcp/RequestMediaUploadToolTest.php b/tests/Feature/Mcp/RequestMediaUploadToolTest.php
index 8ce7afbce..e7177eb06 100644
--- a/tests/Feature/Mcp/RequestMediaUploadToolTest.php
+++ b/tests/Feature/Mcp/RequestMediaUploadToolTest.php
@@ -2,6 +2,7 @@
 
 declare(strict_types=1);
 
+use App\Enums\Media\Type as MediaType;
 use App\Enums\UserWorkspace\Role;
 use App\Mcp\Servers\TryPostServer;
 use App\Mcp\Tools\Post\RequestMediaUploadTool;
@@ -26,7 +27,10 @@
             $json->has('upload_token')
                 ->has('upload_url')
                 ->has('expires_at')
-                ->where('max_bytes', 52428800)
+                ->where('max_bytes', MediaType::Video->maxSizeInBytes())
+                ->where('max_bytes_by_type.image', MediaType::Image->maxSizeInBytes())
+                ->where('max_bytes_by_type.video', MediaType::Video->maxSizeInBytes())
+                ->where('max_bytes_by_type.document', MediaType::Document->maxSizeInBytes())
                 ->where('field_name', 'media')
                 ->etc();
         });
diff --git a/tests/Feature/Services/Social/PinterestPublisherTest.php b/tests/Feature/Services/Social/PinterestPublisherTest.php
index c39e1ffd6..fbd9c0a95 100644
--- a/tests/Feature/Services/Social/PinterestPublisherTest.php
+++ b/tests/Feature/Services/Social/PinterestPublisherTest.php
@@ -512,10 +512,69 @@
         ], 200),
     ]);
 
-    $boards = $this->publisher->getBoards($this->socialAccount);
+    $result = $this->publisher->getBoards($this->socialAccount);
 
-    expect($boards)->toHaveCount(2);
-    expect($boards[0]['id'])->toBe('board_1');
+    expect($result['boards'])->toHaveCount(2)
+        ->and($result['boards'][0]['id'])->toBe('board_1')
+        ->and($result['truncated'])->toBeFalse();
+});
+
+test('pinterest publisher paginates boards via bookmark', function () {
+    Http::fake([
+        config('trypost.platforms.pinterest.api').'/boards*' => Http::sequence()
+            ->push([
+                'items' => [
+                    ['id' => 'board_1', 'name' => 'Board 1'],
+                ],
+                'bookmark' => 'page-2',
+            ], 200)
+            ->push([
+                'items' => [
+                    ['id' => 'board_2', 'name' => 'Board 2'],
+                ],
+                'bookmark' => 'page-3',
+            ], 200)
+            ->push([
+                'items' => [
+                    ['id' => 'board_3', 'name' => 'Board 3'],
+                ],
+            ], 200),
+    ]);
+
+    $result = $this->publisher->getBoards($this->socialAccount);
+
+    expect($result['boards'])->toHaveCount(3)
+        ->and($result['boards'][0]['id'])->toBe('board_1')
+        ->and($result['boards'][1]['id'])->toBe('board_2')
+        ->and($result['boards'][2]['id'])->toBe('board_3')
+        ->and($result['truncated'])->toBeFalse();
+
+    Http::assertSentCount(3);
+});
+
+test('pinterest publisher stops board pagination on a repeated bookmark', function () {
+    Http::fake([
+        config('trypost.platforms.pinterest.api').'/boards*' => Http::sequence()
+            ->push([
+                'items' => [['id' => 'board_1', 'name' => 'Board 1']],
+                'bookmark' => 'stuck',
+            ], 200)
+            ->push([
+                'items' => [['id' => 'board_2', 'name' => 'Board 2']],
+                'bookmark' => 'stuck',
+            ], 200)
+            ->push([
+                'items' => [['id' => 'should_not_fetch', 'name' => 'Nope']],
+            ], 200),
+    ]);
+
+    $result = $this->publisher->getBoards($this->socialAccount);
+
+    expect($result['boards'])->toHaveCount(2)
+        ->and(collect($result['boards'])->pluck('id')->all())->toBe(['board_1', 'board_2'])
+        ->and($result['truncated'])->toBeTrue();
+
+    Http::assertSentCount(2);
 });
 
 test('pinterest publisher can publish video pin', function () {
diff --git a/tests/Unit/Enums/ContentTypeTest.php b/tests/Unit/Enums/ContentTypeTest.php
index 6dd1ba83d..aa87067af 100644
--- a/tests/Unit/Enums/ContentTypeTest.php
+++ b/tests/Unit/Enums/ContentTypeTest.php
@@ -2,6 +2,7 @@
 
 declare(strict_types=1);
 
+use App\Enums\Media\Type as MediaType;
 use App\Enums\PostPlatform\ContentType;
 use App\Enums\SocialAccount\Platform;
 
@@ -21,11 +22,69 @@
 
 test('content type has correct descriptions', function () {
     expect(ContentType::InstagramFeed->description())->toContain('feed');
-    expect(ContentType::InstagramReel->description())->toContain('90 seconds');
+    expect(ContentType::InstagramReel->description())->toContain('15 minutes');
+    expect(ContentType::FacebookReel->description())->toContain('90 seconds');
     expect(ContentType::InstagramStory->description())->toContain('24 hours');
     expect(ContentType::YouTubeShort->description())->toContain('3 minutes');
 });
 
+test('content type exposes max video duration in seconds', function () {
+    expect(ContentType::InstagramReel->maxVideoDurationSec())->toBe(15 * 60);
+    expect(ContentType::FacebookReel->maxVideoDurationSec())->toBe(90);
+    expect(ContentType::YouTubeShort->maxVideoDurationSec())->toBe(3 * 60);
+    expect(ContentType::TikTokVideo->maxVideoDurationSec())->toBeNull();
+});
+
+test('media rules for frontend expose the full editor rule set keyed by content type', function () {
+    $rules = ContentType::mediaRulesForFrontend();
+
+    expect($rules)->toHaveCount(count(ContentType::cases()));
+
+    expect($rules['instagram_reel'])->toMatchArray([
+        'max_files' => 1,
+        'accept_images' => false,
+        'accept_videos' => true,
+        'requires_media' => true,
+        'max_video_bytes' => 1 * 1024 * 1024 * 1024,
+        'max_video_duration_sec' => 900,
+        'aspect_ratio_min' => 0.5,
+        'aspect_ratio_max' => 0.6,
+    ]);
+
+    expect($rules['facebook_reel']['max_video_duration_sec'])->toBe(90);
+    expect($rules['tiktok_video']['max_video_duration_sec'])->toBeNull();
+    expect($rules['linkedin_post']['max_document_bytes'])->toBe(100 * 1024 * 1024);
+    expect($rules['pinterest_carousel']['min_files'])->toBe(2);
+    expect($rules['x_post']['accepts_gif'])->toBeTrue();
+    expect($rules['instagram_feed']['requires_media'])->toBeTrue();
+    expect($rules['discord_message']['accepts_gif'])->toBeTrue();
+    expect($rules['telegram_post']['accepts_gif'])->toBeTrue();
+});
+
+test('listing array mirrors media capability fields for api and mcp', function () {
+    $listing = ContentType::PinterestCarousel->toListingArray();
+
+    expect($listing)->toMatchArray([
+        'value' => 'pinterest_carousel',
+        'max_media_count' => 5,
+        'min_media_count' => 2,
+        'requires_media' => true,
+        'accept_images' => true,
+        'accept_videos' => false,
+    ]);
+
+    expect(ContentType::InstagramReel->toListingArray()['accept_images'])->toBeFalse();
+});
+
+test('media rules reuse enum capability helpers', function () {
+    $rules = ContentType::InstagramStory->mediaRules();
+
+    expect($rules['accept_images'])->toBe(ContentType::InstagramStory->supportsImage())
+        ->and($rules['accept_videos'])->toBe(ContentType::InstagramStory->supportsVideo())
+        ->and($rules['auto_fits_image'])->toBeTrue()
+        ->and($rules['max_files'])->toBe(ContentType::InstagramStory->maxMediaCount());
+});
+
 test('content type maps to correct platform', function () {
     expect(ContentType::InstagramFeed->platform())->toBe(Platform::Instagram);
     expect(ContentType::InstagramReel->platform())->toBe(Platform::Instagram);
@@ -95,10 +154,10 @@
 
 test('content type requires media correctly', function () {
     expect(ContentType::InstagramReel->requiresMedia())->toBeTrue();
+    expect(ContentType::InstagramFeed->requiresMedia())->toBeTrue();
     expect(ContentType::TikTokVideo->requiresMedia())->toBeTrue();
     expect(ContentType::YouTubeShort->requiresMedia())->toBeTrue();
     expect(ContentType::PinterestPin->requiresMedia())->toBeTrue();
-    expect(ContentType::InstagramFeed->requiresMedia())->toBeFalse();
     expect(ContentType::LinkedInPost->requiresMedia())->toBeFalse();
     expect(ContentType::XPost->requiresMedia())->toBeFalse();
     expect(ContentType::ThreadsPost->requiresMedia())->toBeFalse();
@@ -106,6 +165,126 @@
     expect(ContentType::MastodonPost->requiresMedia())->toBeFalse();
 });
 
+test('media rules keep editor parity for gif and requires_media flags', function () {
+    expect(ContentType::DiscordMessage->acceptsGif())->toBeTrue();
+    expect(ContentType::TelegramPost->acceptsGif())->toBeTrue();
+    expect(ContentType::InstagramFeed->mediaRules()['requires_media'])->toBeTrue();
+    expect(ContentType::DiscordMessage->mediaRules()['accepts_gif'])->toBeTrue();
+});
+
+/**
+ * Lock the flags / limits that used to live in the Vue CONTENT_TYPE_RULES map
+ * so a future centralization drift cannot silently flip editor behavior again.
+ * Byte caps are the post-clamp values (min(platform, trypost.media hard limit)).
+ */
+test('media rules preserve pre-centralization editor limits for mapped types', function () {
+    $mb = 1024 * 1024;
+    $gb = 1024 * $mb;
+    $hardImage = MediaType::Image->maxSizeInBytes();
+    $hardVideo = MediaType::Video->maxSizeInBytes();
+    $hardDocument = MediaType::Document->maxSizeInBytes();
+
+    $expected = [
+        'instagram_feed' => [
+            'requires_media' => true,
+            'accepts_gif' => false,
+            'max_files' => 10,
+            'max_video_duration_sec' => 60,
+            'max_image_bytes' => min(8 * $mb, $hardImage),
+            'max_video_bytes' => min(100 * $mb, $hardVideo),
+        ],
+        'instagram_reel' => [
+            'requires_media' => true,
+            'accepts_gif' => false,
+            'max_files' => 1,
+            'max_video_duration_sec' => 900,
+            'max_video_bytes' => min(1 * $gb, $hardVideo),
+        ],
+        'youtube_short' => [
+            'requires_media' => true,
+            'accepts_gif' => false,
+            'max_files' => 1,
+            'max_video_duration_sec' => 180,
+            // Platform advertises 256GB; editor must not exceed upload hard cap.
+            'max_video_bytes' => $hardVideo,
+        ],
+        'pinterest_pin' => [
+            'requires_media' => true,
+            'accepts_gif' => false,
+            'max_files' => 1,
+            // Platform advertises 20MB; hard image cap is typically 10MB.
+            'max_image_bytes' => $hardImage,
+        ],
+        'facebook_post' => [
+            'requires_media' => false,
+            'accepts_gif' => false,
+            'max_files' => 10,
+            'max_video_duration_sec' => 240 * 60,
+            'max_video_bytes' => $hardVideo,
+        ],
+        'linkedin_post' => [
+            'requires_media' => false,
+            'accepts_gif' => false,
+            'max_files' => 10,
+            'max_document_bytes' => min(100 * $mb, $hardDocument),
+            'max_video_bytes' => $hardVideo,
+        ],
+        'x_post' => [
+            'requires_media' => false,
+            'accepts_gif' => true,
+            'max_files' => 4,
+            'max_video_duration_sec' => 140,
+            'max_video_bytes' => min(512 * $mb, $hardVideo),
+        ],
+        'discord_message' => [
+            'requires_media' => false,
+            'accepts_gif' => true,
+            'max_files' => 10,
+        ],
+        'telegram_post' => [
+            'requires_media' => false,
+            'accepts_gif' => true,
+            'max_files' => 10,
+        ],
+    ];
+
+    foreach ($expected as $type => $fields) {
+        $rules = ContentType::from($type)->mediaRules();
+
+        foreach ($fields as $key => $value) {
+            expect($rules[$key])->toBe($value, "{$type}.{$key}");
+        }
+    }
+});
+
+test('media byte caps never exceed the global upload hard limits', function () {
+    $hardImage = MediaType::Image->maxSizeInBytes();
+    $hardVideo = MediaType::Video->maxSizeInBytes();
+    $hardDocument = MediaType::Document->maxSizeInBytes();
+
+    foreach (ContentType::cases() as $type) {
+        $image = $type->maxImageBytes();
+        $video = $type->maxVideoBytes();
+        $document = $type->maxDocumentBytes();
+
+        if ($image !== null) {
+            expect($image)->toBeLessThanOrEqual($hardImage, "{$type->value}.max_image_bytes");
+        }
+
+        if ($video !== null) {
+            expect($video)->toBeLessThanOrEqual($hardVideo, "{$type->value}.max_video_bytes");
+        }
+
+        if ($document !== null) {
+            expect($document)->toBeLessThanOrEqual($hardDocument, "{$type->value}.max_document_bytes");
+        }
+    }
+
+    expect(ContentType::YouTubeShort->maxVideoBytes())->toBe($hardVideo)
+        ->and(ContentType::PinterestPin->maxImageBytes())->toBe($hardImage)
+        ->and(ContentType::FacebookPost->maxVideoBytes())->toBe($hardVideo);
+});
+
 test('can get content types for platform', function () {
     $instagramTypes = ContentType::forPlatform(Platform::Instagram);
 
diff --git a/tests/Unit/Policies/SocialAccountPolicyTest.php b/tests/Unit/Policies/SocialAccountPolicyTest.php
new file mode 100644
index 000000000..99a6bc90e
--- /dev/null
+++ b/tests/Unit/Policies/SocialAccountPolicyTest.php
@@ -0,0 +1,40 @@
+<?php
+
+declare(strict_types=1);
+
+use App\Enums\UserWorkspace\Role;
+use App\Models\SocialAccount;
+use App\Models\User;
+use App\Models\Workspace;
+use App\Policies\SocialAccountPolicy;
+use Illuminate\Auth\Access\Response;
+
+beforeEach(function () {
+    $this->policy = new SocialAccountPolicy;
+});
+
+test('members of the current workspace can view a social account', function () {
+    $user = User::factory()->create();
+    $workspace = Workspace::factory()->create(['user_id' => $user->id]);
+    $workspace->members()->attach($user->id, ['role' => Role::Member->value]);
+    $user->update(['current_workspace_id' => $workspace->id]);
+
+    $account = SocialAccount::factory()->create(['workspace_id' => $workspace->id]);
+
+    expect($this->policy->view($user->fresh(), $account))->toBeTrue();
+});
+
+test('cross-workspace social account lookups deny as not found', function () {
+    $user = User::factory()->create();
+    $workspace = Workspace::factory()->create(['user_id' => $user->id]);
+    $workspace->members()->attach($user->id, ['role' => Role::Member->value]);
+    $user->update(['current_workspace_id' => $workspace->id]);
+
+    $otherWorkspace = Workspace::factory()->create();
+    $account = SocialAccount::factory()->create(['workspace_id' => $otherWorkspace->id]);
+
+    $result = $this->policy->view($user->fresh(), $account);
+
+    expect($result)->toBeInstanceOf(Response::class)
+        ->and($result->status())->toBe(404);
+});