diff --git a/src/Core/SimpleInterfaces.cs b/src/Core/SimpleInterfaces.cs
new file mode 100644
index 0000000..6bd6161
--- /dev/null
+++ b/src/Core/SimpleInterfaces.cs
@@ -0,0 +1,183 @@
+using System;
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+using Microsoft.Extensions.Logging;
+
+namespace TransmissionRssManager.Core
+{
+    public class TorrentInfo
+    {
+        public int Id { get; set; }
+        public string Name { get; set; } = string.Empty;
+        public string Status { get; set; } = string.Empty;
+        public double PercentDone { get; set; }
+        public long TotalSize { get; set; }
+        public string DownloadDir { get; set; } = string.Empty;
+        public bool IsFinished => PercentDone >= 1.0;
+        public DateTime? AddedDate { get; set; }
+        public DateTime? CompletedDate { get; set; }
+        public long DownloadedEver { get; set; }
+        public long UploadedEver { get; set; }
+        public int UploadRatio { get; set; }
+        public string ErrorString { get; set; } = string.Empty;
+        public bool IsError => !string.IsNullOrEmpty(ErrorString);
+        public int Priority { get; set; }
+        public string HashString { get; set; } = string.Empty;
+        public int PeersConnected { get; set; }
+        public double DownloadSpeed { get; set; }
+        public double UploadSpeed { get; set; }
+        public string Category { get; set; } = string.Empty;
+        public bool HasMetadata { get; set; }
+        public string TransmissionInstance { get; set; } = "default";
+        public string SourceFeedId { get; set; } = string.Empty;
+        public bool IsPostProcessed { get; set; }
+    }
+    
+    public class AppConfig
+    {
+        public TransmissionConfig Transmission { get; set; } = new TransmissionConfig();
+        public Dictionary<string, TransmissionConfig> TransmissionInstances { get; set; } = new Dictionary<string, TransmissionConfig>();
+        public List<RssFeed> Feeds { get; set; } = new List<RssFeed>();
+        public bool AutoDownloadEnabled { get; set; }
+        public int CheckIntervalMinutes { get; set; } = 30;
+        public string DownloadDirectory { get; set; } = string.Empty;
+        public string MediaLibraryPath { get; set; } = string.Empty;
+        public PostProcessingConfig PostProcessing { get; set; } = new PostProcessingConfig();
+        public bool EnableDetailedLogging { get; set; } = false;
+        public UserPreferences UserPreferences { get; set; } = new UserPreferences();
+    }
+    
+    public class TransmissionConfig
+    {
+        public string Host { get; set; } = "localhost";
+        public int Port { get; set; } = 9091;
+        public string Username { get; set; } = string.Empty;
+        public string Password { get; set; } = string.Empty;
+        public bool UseHttps { get; set; } = false;
+        public string Url => $"{(UseHttps ? "https" : "http")}://{Host}:{Port}/transmission/rpc";
+    }
+    
+    public class RssFeed
+    {
+        public string Id { get; set; } = string.Empty;
+        public string Url { get; set; } = string.Empty;
+        public string Name { get; set; } = string.Empty;
+        public List<string> Rules { get; set; } = new List<string>();
+        public List<RssFeedRule> AdvancedRules { get; set; } = new List<RssFeedRule>();
+        public bool AutoDownload { get; set; }
+        public DateTime LastChecked { get; set; }
+        public string TransmissionInstanceId { get; set; } = "default";
+        public string Schedule { get; set; } = "*/30 * * * *"; // Default is every 30 minutes (cron expression)
+        public bool Enabled { get; set; } = true;
+        public int MaxHistoryItems { get; set; } = 100;
+        public string DefaultCategory { get; set; } = string.Empty;
+        public int ErrorCount { get; set; } = 0;
+        public DateTime? LastError { get; set; }
+        public string LastErrorMessage { get; set; } = string.Empty;
+    }
+    
+    public class RssFeedRule
+    {
+        public string Id { get; set; } = string.Empty;
+        public string Name { get; set; } = string.Empty;
+        public string Pattern { get; set; } = string.Empty;
+        public bool IsRegex { get; set; } = false;
+        public bool IsEnabled { get; set; } = true;
+        public bool IsCaseSensitive { get; set; } = false;
+        public string Category { get; set; } = string.Empty;
+        public int Priority { get; set; } = 0;
+        public string Action { get; set; } = "download"; // download, notify, ignore
+        public string DestinationFolder { get; set; } = string.Empty;
+    }
+    
+    public class PostProcessingConfig
+    {
+        public bool Enabled { get; set; } = false;
+        public bool ExtractArchives { get; set; } = true;
+        public bool OrganizeMedia { get; set; } = true;
+        public int MinimumSeedRatio { get; set; } = 1;
+        public List<string> MediaExtensions { get; set; } = new List<string> { ".mp4", ".mkv", ".avi" };
+        public bool AutoOrganizeByMediaType { get; set; } = true;
+        public bool RenameFiles { get; set; } = false;
+        public bool CompressCompletedFiles { get; set; } = false;
+        public int DeleteCompletedAfterDays { get; set; } = 0; // 0 = never delete
+    }
+    
+    public class UserPreferences
+    {
+        public bool EnableDarkMode { get; set; } = false;
+        public bool AutoRefreshUIEnabled { get; set; } = true;
+        public int AutoRefreshIntervalSeconds { get; set; } = 30;
+        public bool NotificationsEnabled { get; set; } = true;
+        public List<string> NotificationEvents { get; set; } = new List<string> 
+        { 
+            "torrent-added", 
+            "torrent-completed", 
+            "torrent-error" 
+        };
+        public string DefaultView { get; set; } = "dashboard";
+        public bool ConfirmBeforeDelete { get; set; } = true;
+        public int MaxItemsPerPage { get; set; } = 25;
+        public string DateTimeFormat { get; set; } = "yyyy-MM-dd HH:mm:ss";
+        public bool ShowCompletedTorrents { get; set; } = true;
+        public int KeepHistoryDays { get; set; } = 30;
+    }
+    
+    public interface IConfigService
+    {
+        AppConfig GetConfiguration();
+        Task SaveConfigurationAsync(AppConfig config);
+    }
+    
+    public interface ITransmissionClient
+    {
+        Task<List<TorrentInfo>> GetTorrentsAsync();
+        Task<int> AddTorrentAsync(string torrentUrl, string downloadDir);
+        Task RemoveTorrentAsync(int id, bool deleteLocalData);
+        Task StartTorrentAsync(int id);
+        Task StopTorrentAsync(int id);
+    }
+    
+    public interface IRssFeedManager
+    {
+        Task<List<RssFeedItem>> GetAllItemsAsync();
+        Task<List<RssFeedItem>> GetMatchedItemsAsync();
+        Task<List<RssFeed>> GetFeedsAsync();
+        Task AddFeedAsync(RssFeed feed);
+        Task RemoveFeedAsync(string feedId);
+        Task UpdateFeedAsync(RssFeed feed);
+        Task RefreshFeedsAsync(CancellationToken cancellationToken);
+        Task RefreshFeedAsync(string feedId, CancellationToken cancellationToken);
+        Task MarkItemAsDownloadedAsync(string itemId);
+    }
+    
+    public interface IPostProcessor
+    {
+        Task ProcessCompletedDownloadsAsync(CancellationToken cancellationToken);
+        Task ProcessTorrentAsync(TorrentInfo torrent);
+    }
+    
+    public class RssFeedItem
+    {
+        public string Id { get; set; } = string.Empty;
+        public string Title { get; set; } = string.Empty;
+        public string Link { get; set; } = string.Empty;
+        public string Description { get; set; } = string.Empty;
+        public DateTime PublishDate { get; set; }
+        public string TorrentUrl { get; set; } = string.Empty;
+        public bool IsDownloaded { get; set; }
+        public bool IsMatched { get; set; }
+        public string MatchedRule { get; set; } = string.Empty;
+        public string FeedId { get; set; } = string.Empty;
+        public string Category { get; set; } = string.Empty;
+        public long Size { get; set; }
+        public string Author { get; set; } = string.Empty;
+        public List<string> Categories { get; set; } = new List<string>();
+        public Dictionary<string, string> AdditionalMetadata { get; set; } = new Dictionary<string, string>();
+        public DateTime? DownloadDate { get; set; }
+        public int? TorrentId { get; set; }
+        public string RejectionReason { get; set; } = string.Empty;
+        public bool IsRejected => !string.IsNullOrEmpty(RejectionReason);
+    }
+}
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