diff --git a/app/Console/Commands/SyncChannelPostsCommand.php b/app/Console/Commands/SyncChannelPostsCommand.php
new file mode 100644
index 0000000..f41e8d9
--- /dev/null
+++ b/app/Console/Commands/SyncChannelPostsCommand.php
@@ -0,0 +1,60 @@
+<?php
+
+namespace App\Console\Commands;
+
+use App\Enums\PlatformEnum;
+use App\Jobs\SyncChannelPostsJob;
+use App\Modules\Lemmy\Services\LemmyApiService;
+use Illuminate\Console\Command;
+
+class SyncChannelPostsCommand extends Command
+{
+    protected $signature = 'channel:sync {platform=lemmy}';
+    
+    protected $description = 'Manually sync channel posts for a platform';
+
+    public function handle(): int
+    {
+        $platform = $this->argument('platform');
+        
+        if ($platform === 'lemmy') {
+            return $this->syncLemmy();
+        }
+        
+        $this->error("Unsupported platform: {$platform}");
+        return self::FAILURE;
+    }
+
+    private function syncLemmy(): int
+    {
+        $communityName = config('lemmy.community');
+        
+        if (!$communityName) {
+            $this->error('Missing Lemmy community configuration (lemmy.community)');
+            return self::FAILURE;
+        }
+
+        try {
+            $this->info("Getting community ID for: {$communityName}");
+            
+            $api = new LemmyApiService(config('lemmy.instance'));
+            $communityId = $api->getCommunityId($communityName);
+
+            $this->info("Running sync job for Lemmy community: {$communityName} (ID: {$communityId})");
+            
+            SyncChannelPostsJob::dispatchSync(
+                PlatformEnum::LEMMY,
+                (string) $communityId,
+                $communityName
+            );
+            
+            $this->info('Channel posts synced successfully');
+            
+            return self::SUCCESS;
+            
+        } catch (\Exception $e) {
+            $this->error("Failed to sync channel posts: {$e->getMessage()}");
+            return self::FAILURE;
+        }
+    }
+}
diff --git a/app/Jobs/SyncChannelPostsJob.php b/app/Jobs/SyncChannelPostsJob.php
new file mode 100644
index 0000000..66d1316
--- /dev/null
+++ b/app/Jobs/SyncChannelPostsJob.php
@@ -0,0 +1,76 @@
+<?php
+
+namespace App\Jobs;
+
+use App\Enums\PlatformEnum;
+use App\Exceptions\PlatformAuthException;
+use App\Modules\Lemmy\Services\LemmyApiService;
+use Exception;
+use Illuminate\Contracts\Queue\ShouldQueue;
+use Illuminate\Foundation\Queue\Queueable;
+use Illuminate\Support\Facades\Cache;
+
+class SyncChannelPostsJob implements ShouldQueue
+{
+    use Queueable;
+
+    public function __construct(
+        private readonly PlatformEnum $platform,
+        private readonly string $channelId,
+        private readonly string $channelName
+    ) {
+        $this->onQueue('lemmy-posts');
+    }
+
+    public function handle(): void
+    {
+        if ($this->platform === PlatformEnum::LEMMY) {
+            $this->syncLemmyChannelPosts();
+        }
+    }
+
+    private function syncLemmyChannelPosts(): void
+    {
+        try {
+            $api = new LemmyApiService(config('lemmy.instance'));
+            $token = $this->getAuthToken($api);
+
+            $api->syncChannelPosts($token, (int) $this->channelId, $this->channelName);
+
+            logger()->info('Channel posts synced successfully', [
+                'platform' => $this->platform->value,
+                'channel_id' => $this->channelId,
+                'channel_name' => $this->channelName
+            ]);
+
+        } catch (Exception $e) {
+            logger()->error('Failed to sync channel posts', [
+                'platform' => $this->platform->value,
+                'channel_id' => $this->channelId,
+                'error' => $e->getMessage()
+            ]);
+            
+            throw $e;
+        }
+    }
+
+    private function getAuthToken(LemmyApiService $api): string
+    {
+        return Cache::remember('lemmy_jwt_token', 3600, function () use ($api) {
+            $username = config('lemmy.username');
+            $password = config('lemmy.password');
+
+            if (!$username || !$password) {
+                throw new PlatformAuthException(PlatformEnum::LEMMY, 'Missing credentials');
+            }
+
+            $token = $api->login($username, $password);
+            
+            if (!$token) {
+                throw new PlatformAuthException(PlatformEnum::LEMMY, 'Login failed');
+            }
+
+            return $token;
+        });
+    }
+}
diff --git a/app/Models/Article.php b/app/Models/Article.php
index cdd6511..6596ac9 100644
--- a/app/Models/Article.php
+++ b/app/Models/Article.php
@@ -30,6 +30,7 @@ class Article extends Model
         'title',
         'description',
         'is_valid',
+        'is_duplicate',
         'fetched_at',
         'validated_at',
     ];
@@ -37,6 +38,8 @@ class Article extends Model
     public function casts(): array
     {
         return [
+            'is_valid' => 'boolean',
+            'is_duplicate' => 'boolean',
             'fetched_at' => 'datetime',
             'validated_at' => 'datetime',
             'created_at' => 'datetime',
diff --git a/app/Models/ArticlePublication.php b/app/Models/ArticlePublication.php
index f72f312..52b87cc 100644
--- a/app/Models/ArticlePublication.php
+++ b/app/Models/ArticlePublication.php
@@ -5,14 +5,21 @@
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
 
+/**
+ * @property integer $article_id
+ * @property integer $community_id
+ * @property integer $post_id
+ *
+ * @method static create(array $array)
+ */
 class ArticlePublication extends Model
 {
     protected $fillable = [
         'article_id',
-        'published_at',
         'community_id',
-        'published_by',
         'post_id',
+        'published_at',
+        'published_by',
         'platform',
         'publication_data',
     ];
diff --git a/app/Models/PlatformChannelPost.php b/app/Models/PlatformChannelPost.php
new file mode 100644
index 0000000..700e3ae
--- /dev/null
+++ b/app/Models/PlatformChannelPost.php
@@ -0,0 +1,56 @@
+<?php
+
+namespace App\Models;
+
+use App\Enums\PlatformEnum;
+use Illuminate\Database\Eloquent\Model;
+
+/**
+ * @method static where(string $string, PlatformEnum $platform)
+ * @method static updateOrCreate(array $array, array $array1)
+ */
+class PlatformChannelPost extends Model
+{
+    protected $fillable = [
+        'platform',
+        'channel_id',
+        'channel_name',
+        'post_id',
+        'url',
+        'title',
+        'posted_at',
+    ];
+
+    protected function casts(): array
+    {
+        return [
+            'posted_at' => 'datetime',
+            'platform' => PlatformEnum::class,
+        ];
+    }
+
+    public static function urlExists(PlatformEnum $platform, string $channelId, string $url): bool
+    {
+        return self::where('platform', $platform)
+            ->where('channel_id', $channelId)
+            ->where('url', $url)
+            ->exists();
+    }
+
+    public static function storePost(PlatformEnum $platform, string $channelId, ?string $channelName, string $postId, ?string $url, ?string $title, ?\DateTime $postedAt = null): self
+    {
+        return self::updateOrCreate(
+            [
+                'platform' => $platform,
+                'channel_id' => $channelId,
+                'post_id' => $postId,
+            ],
+            [
+                'channel_name' => $channelName,
+                'url' => $url,
+                'title' => $title,
+                'posted_at' => $postedAt ?? now(),
+            ]
+        );
+    }
+}
diff --git a/app/Modules/Lemmy/Services/LemmyApiService.php b/app/Modules/Lemmy/Services/LemmyApiService.php
index 0e369ff..5178eab 100644
--- a/app/Modules/Lemmy/Services/LemmyApiService.php
+++ b/app/Modules/Lemmy/Services/LemmyApiService.php
@@ -2,6 +2,8 @@
 
 namespace App\Modules\Lemmy\Services;
 
+use App\Enums\PlatformEnum;
+use App\Models\PlatformChannelPost;
 use App\Modules\Lemmy\LemmyRequest;
 use Exception;
 
@@ -57,6 +59,54 @@ public function getCommunityId(string $communityName): int
         }
     }
 
+    public function syncChannelPosts(string $token, int $communityId, string $communityName): void
+    {
+        try {
+            $request = new LemmyRequest($this->instance, $token);
+            $response = $request->get('post/list', [
+                'community_id' => $communityId,
+                'limit' => 50,
+                'sort' => 'New'
+            ]);
+
+            if (!$response->successful()) {
+                logger()->warning('Failed to sync channel posts', [
+                    'status' => $response->status(),
+                    'community_id' => $communityId
+                ]);
+                return;
+            }
+
+            $data = $response->json();
+            $posts = $data['posts'] ?? [];
+
+            foreach ($posts as $postData) {
+                $post = $postData['post'];
+                
+                PlatformChannelPost::storePost(
+                    PlatformEnum::LEMMY,
+                    (string) $communityId,
+                    $communityName,
+                    (string) $post['id'],
+                    $post['url'] ?? null,
+                    $post['name'] ?? null,
+                    isset($post['published']) ? new \DateTime($post['published']) : null
+                );
+            }
+
+            logger()->info('Synced channel posts', [
+                'community_id' => $communityId,
+                'posts_count' => count($posts)
+            ]);
+
+        } catch (Exception $e) {
+            logger()->error('Exception while syncing channel posts', [
+                'error' => $e->getMessage(),
+                'community_id' => $communityId
+            ]);
+        }
+    }
+
     public function createPost(string $token, string $title, string $body, int $communityId, ?string $url = null, ?string $thumbnail = null): array
     {
         try {
diff --git a/app/Modules/Lemmy/Services/LemmyPublisher.php b/app/Modules/Lemmy/Services/LemmyPublisher.php
index d4a36f1..a8fd87d 100644
--- a/app/Modules/Lemmy/Services/LemmyPublisher.php
+++ b/app/Modules/Lemmy/Services/LemmyPublisher.php
@@ -67,7 +67,7 @@ private function getAuthToken(): string
             }
 
             $token = $this->api->login($username, $password);
-            
+
             if (!$token) {
                 throw new PlatformAuthException(PlatformEnum::LEMMY, 'Login failed');
             }
diff --git a/database/migrations/2025_06_29_072202_create_articles_table.php b/database/migrations/2025_06_29_072202_create_articles_table.php
index 8821f4d..889bd74 100644
--- a/database/migrations/2025_06_29_072202_create_articles_table.php
+++ b/database/migrations/2025_06_29_072202_create_articles_table.php
@@ -14,6 +14,7 @@ public function up(): void
             $table->string('title')->nullable();
             $table->text('description')->nullable();
             $table->boolean('is_valid')->nullable();
+            $table->boolean('is_duplicate')->default(false);
             $table->timestamp('validated_at')->nullable();
             $table->timestamps();
         });
diff --git a/database/migrations/2025_06_30_163438_create_platform_channel_posts_table.php b/database/migrations/2025_06_30_163438_create_platform_channel_posts_table.php
new file mode 100644
index 0000000..d8c1914
--- /dev/null
+++ b/database/migrations/2025_06_30_163438_create_platform_channel_posts_table.php
@@ -0,0 +1,33 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::create('platform_channel_posts', function (Blueprint $table) {
+            $table->id();
+            $table->string('platform'); 
+            $table->string('channel_id');
+            $table->string('channel_name')->nullable();
+            $table->string('post_id');
+            $table->longText('url')->nullable();
+            $table->string('title')->nullable();
+            $table->timestamp('posted_at');
+            $table->timestamps();
+            
+            $table->index(['platform', 'channel_id']);
+            $table->index(['platform', 'channel_id', 'posted_at']);
+            // Will add URL index with prefix after table creation
+            $table->unique(['platform', 'channel_id', 'post_id']);
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('platform_channel_posts');
+    }
+};
diff --git a/routes/console.php b/routes/console.php
index 3aeb350..bc6a0cc 100644
--- a/routes/console.php
+++ b/routes/console.php
@@ -1,6 +1,8 @@
 <?php
 
 use App\Console\Commands\FetchNewArticlesCommand;
+use App\Enums\PlatformEnum;
+use App\Jobs\SyncChannelPostsJob;
 use App\Models\Article;
 use App\Modules\Lemmy\Services\LemmyPublisher;
 use App\Services\Article\ArticleFetcher;
@@ -36,3 +38,24 @@
         logger()->debug('No unpublished valid articles found for Lemmy publishing');
     }
 })->everyFifteenMinutes()->name('publish-to-lemmy');
+
+Schedule::call(function () {
+    $communityId = config('lemmy.community_id');
+    $communityName = config('lemmy.community');
+
+    if ($communityId && $communityName) {
+        SyncChannelPostsJob::dispatch(
+            PlatformEnum::LEMMY,
+            $communityId,
+            $communityName
+        );
+
+        logger()->info('Dispatched channel posts sync job', [
+            'platform' => 'lemmy',
+            'community_id' => $communityId,
+            'community_name' => $communityName
+        ]);
+    } else {
+        logger()->warning('Missing Lemmy community configuration for sync job');
+    }
+})->everyTenMinutes()->name('sync-lemmy-channel-posts');