refactor: reverse Core↔Differential dependency, make all components independent

src/c#/DifferentialTest/DifferentialCoreTests.cs

@@ -1,7 +1,7 @@
 using Moq;
-using GeneralUpdate.Differential;
+using GeneralUpdate.Core;
 using GeneralUpdate.Differential.Abstractions;
-using GeneralUpdate.Differential.Matchers;
+using GeneralUpdate.Core.Differential;
 
 namespace DifferentialTest
 {

src/c#/DifferentialTest/Matchers/DefaultCleanMatcherTests.cs

@@ -1,4 +1,4 @@
-using GeneralUpdate.Differential.Matchers;
+using GeneralUpdate.Core.Differential;
 
 namespace DifferentialTest.Matchers
 {

src/c#/DifferentialTest/Matchers/DefaultCleanStrategyTests.cs

@@ -1,7 +1,7 @@
 using Moq;
 using GeneralUpdate.Core.FileSystem;
 using GeneralUpdate.Differential.Abstractions;
-using GeneralUpdate.Differential.Matchers;
+using GeneralUpdate.Core.Differential;
 
 namespace DifferentialTest.Matchers
 {

src/c#/DifferentialTest/Matchers/DefaultDirtyMatcherTests.cs

@@ -1,4 +1,4 @@
-using GeneralUpdate.Differential.Matchers;
+using GeneralUpdate.Core.Differential;
 
 namespace DifferentialTest.Matchers
 {

src/c#/DifferentialTest/Matchers/DefaultDirtyStrategyTests.cs

@@ -3,7 +3,7 @@
 using GeneralUpdate.Core.HashAlgorithms;
 using GeneralUpdate.Core.JsonContext;
 using GeneralUpdate.Differential.Abstractions;
-using GeneralUpdate.Differential.Matchers;
+using GeneralUpdate.Core.Differential;
 
 namespace DifferentialTest.Matchers
 {

src/c#/DifferentialTest/Models/DiffProgressTests.cs

@@ -1,4 +1,4 @@
-using GeneralUpdate.Differential.Models;
+using GeneralUpdate.Core.Models;
 
 namespace DifferentialTest.Models
 {

src/c#/DifferentialTest/Pipeline/DiffPipelineBuilderTests.cs

@@ -1,8 +1,8 @@
 using Moq;
 using GeneralUpdate.Differential.Abstractions;
-using GeneralUpdate.Differential.Matchers;
-using GeneralUpdate.Differential.Models;
-using GeneralUpdate.Differential.Pipeline;
+using GeneralUpdate.Core.Differential;
+using GeneralUpdate.Core.Models;
+using GeneralUpdate.Core.Pipeline;
 
 namespace DifferentialTest.Pipeline
 {

src/c#/DifferentialTest/Pipeline/DiffPipelineIntegrationTests.cs

@@ -1,9 +1,9 @@
 using System.IO.Compression;
 using Moq;
 using GeneralUpdate.Differential.Abstractions;
-using GeneralUpdate.Differential.Matchers;
-using GeneralUpdate.Differential.Models;
-using GeneralUpdate.Differential.Pipeline;
+using GeneralUpdate.Core.Differential;
+using GeneralUpdate.Core.Models;
+using GeneralUpdate.Core.Pipeline;
 
 namespace DifferentialTest.Pipeline
 {

src/c#/DifferentialTest/Pipeline/DiffPipelineOptionsTests.cs

@@ -1,4 +1,4 @@
-using GeneralUpdate.Differential.Pipeline;
+using GeneralUpdate.Core.Pipeline;
 
 namespace DifferentialTest.Pipeline
 {

src/c#/DifferentialTest/Pipeline/DiffPipelineTests.cs

@@ -1,8 +1,8 @@
 using Moq;
 using GeneralUpdate.Differential.Abstractions;
-using GeneralUpdate.Differential.Matchers;
-using GeneralUpdate.Differential.Models;
-using GeneralUpdate.Differential.Pipeline;
+using GeneralUpdate.Core.Differential;
+using GeneralUpdate.Core.Models;
+using GeneralUpdate.Core.Pipeline;
 
 namespace DifferentialTest.Pipeline
 {

src/c#/GeneralUpdate.Bowl/Bowl.cs

@@ -6,11 +6,9 @@
 using GeneralUpdate.Bowl.Internal;
 using GeneralUpdate.Bowl.Strategies;
 using GeneralUpdate.Bowl.Strategys;
-using GeneralUpdate.Core.FileSystem;
-using GeneralUpdate.Core.Configuration;
-using GeneralUpdate.Core.JsonContext;
-using GeneralUpdate.Core;
-using GeneralUpdate.Core.Configuration;
+using GeneralUpdate.Bowl.FileSystem;
+using GeneralUpdate.Bowl.Configuration;
+using GeneralUpdate.Bowl.Ipc;
 
 namespace GeneralUpdate.Bowl;
 
@@ -163,7 +161,7 @@
             {
                 GeneralTracer.Info($"Bowl.HandleCrashAsync: restoring backup from " +
                     $"'{context.BackupDirectory}' to '{context.TargetPath}'.");
-                StorageManager.Restore(context.BackupDirectory, context.TargetPath);
+                StorageHelper.Restore(context.BackupDirectory, context.TargetPath);
                 restored = true;
                 GeneralTracer.Info("Bowl.HandleCrashAsync: restore completed.");
             }
@@ -288,7 +286,7 @@
     /// <summary>
     /// Converts legacy <see cref="MonitorParameter"/> to the new <see cref="BowlContext"/>.
     /// </summary>
     public static BowlContext MapToContext(MonitorParameter p)
     {
         return new BowlContext
         {
@@ -310,7 +308,7 @@
     /// Reads <c>ProcessInfo</c> environment variable and builds a legacy <see cref="MonitorParameter"/>.
     /// Shared with the legacy static API for backward compatibility.
     /// </summary>
     internal static MonitorParameter CreateParameter()
     {
         GeneralTracer.Info("Bowl.CreateParameter: reading ProcessInfo from environment variable.");
 
@@ -322,8 +320,7 @@
                 "ProcessInfo environment variable not set.");
         }
 
-        var processInfo = JsonSerializer.Deserialize<ProcessInfo>(
-            json, ProcessInfoJsonContext.Default.ProcessInfo);
+        var processInfo = JsonSerializer.Deserialize<ProcessInfo>(json);
         if (processInfo == null)
         {
             GeneralTracer.Fatal("Bowl.CreateParameter: failed to deserialize ProcessInfo JSON.");

src/c#/GeneralUpdate.Bowl/Configuration/ProcessInfo.cs

@@ -0,0 +1,18 @@
+using System.Text.Json.Serialization;
+
+namespace GeneralUpdate.Bowl.Configuration;
+
+/// <summary>
+/// Minimal ProcessInfo for Bowl — only the fields needed for crash monitoring and rollback.
+/// </summary>
+public class ProcessInfo
+{
+    [JsonPropertyName("AppName")]
+    public string AppName { get; set; } = string.Empty;
+
+    [JsonPropertyName("InstallPath")]
+    public string InstallPath { get; set; } = string.Empty;
+
+    [JsonPropertyName("LastVersion")]
+    public string LastVersion { get; set; } = string.Empty;
+}

src/c#/GeneralUpdate.Bowl/FileSystem/StorageHelper.cs

@@ -0,0 +1,62 @@
+using System;
+using System.IO;
+using System.Text.Json;
+
+namespace GeneralUpdate.Bowl.FileSystem;
+
+/// <summary>
+/// Minimal file system utilities for Bowl (backup restore, directory cleanup, JSON serialization).
+/// </summary>
+public static class StorageHelper
+{
+    public static void Restore(string backupPath, string sourcePath)
+    {
+        if (!Directory.Exists(sourcePath))
+            Directory.CreateDirectory(sourcePath);
+        CopyDirectory(backupPath, sourcePath);
+    }
+
+    private static void CopyDirectory(string sourceDir, string targetDir)
+    {
+        foreach (string dirPath in Directory.GetDirectories(sourceDir, "*", SearchOption.TopDirectoryOnly))
+        {
+            string newTargetDir = Path.Combine(targetDir, Path.GetFileName(dirPath));
+            Directory.CreateDirectory(newTargetDir);
+            CopyDirectory(dirPath, newTargetDir);
+        }
+
+        foreach (string filePath in Directory.GetFiles(sourceDir, "*.*", SearchOption.TopDirectoryOnly))
+        {
+            string newFilePath = Path.Combine(targetDir, Path.GetFileName(filePath));
+            File.Copy(filePath, newFilePath, true);
+        }
+    }
+
+    public static void DeleteDirectory(string targetDir)
+    {
+        foreach (var file in Directory.GetFiles(targetDir))
+        {
+            File.SetAttributes(file, FileAttributes.Normal);
+            File.Delete(file);
+        }
+
+        foreach (var dir in Directory.GetDirectories(targetDir))
+        {
+            DeleteDirectory(dir);
+        }
+
+        Directory.Delete(targetDir, false);
+    }
+
+    public static void CreateJson<T>(string targetPath, T obj) where T : class
+    {
+        var folderPath = Path.GetDirectoryName(targetPath) ??
+                         throw new ArgumentException("invalid path", nameof(targetPath));
+
+        if (!Directory.Exists(folderPath))
+            Directory.CreateDirectory(folderPath);
+
+        var jsonString = JsonSerializer.Serialize(obj);
+        File.WriteAllText(targetPath, jsonString);
+    }
+}

src/c#/GeneralUpdate.Bowl/GeneralUpdate.Bowl.csproj

@@ -18,10 +18,6 @@
         <TargetFrameworks>netstandard2.0;</TargetFrameworks>
     </PropertyGroup>
 
-    <ItemGroup>
-        <ProjectReference Include="..\GeneralUpdate.Core\GeneralUpdate.Core.csproj" />
-    </ItemGroup>
-
     <ItemGroup>
       <PackageReference Include="System.Collections.Immutable" Version="10.0.1" />
       <PackageReference Include="System.Text.Json" Version="10.0.1" />

src/c#/GeneralUpdate.Bowl/Internal/CrashReporter.cs

@@ -3,8 +3,8 @@
 using System.IO;
 using System.Threading;
 using System.Threading.Tasks;
-using GeneralUpdate.Core.FileSystem;
-using GeneralUpdate.Core;
+using GeneralUpdate.Bowl.FileSystem;
+using GeneralUpdate.Bowl;
 
 namespace GeneralUpdate.Bowl.Internal;
 
@@ -38,7 +38,7 @@ public Task<string> GenerateReportAsync(
         };
 
         var failJsonPath = Path.Combine(context.FailDirectory, context.FailFileName);
-        StorageManager.CreateJson(failJsonPath, crash, CrashJsonContext.Default.Crash);
+        StorageHelper.CreateJson(failJsonPath, crash);
 
         GeneralTracer.Info($"CrashReporter.GenerateReportAsync: report written to {failJsonPath}.");
         return Task.FromResult(failJsonPath);

src/c#/GeneralUpdate.Bowl/Internal/EnvironmentProvider.cs

@@ -1,6 +1,7 @@
 using System.Threading;
 using System.Threading.Tasks;
-using GeneralUpdate.Core.Configuration;
+using GeneralUpdate.Bowl.Configuration;
+using GeneralUpdate.Bowl.Ipc;
 
 namespace GeneralUpdate.Bowl.Internal;
 

src/c#/GeneralUpdate.Bowl/Internal/WindowsSystemInfoProvider.cs

@@ -3,7 +3,7 @@
 using System.IO;
 using System.Threading;
 using System.Threading.Tasks;
-using GeneralUpdate.Core;
+using GeneralUpdate.Bowl;
 
 namespace GeneralUpdate.Bowl.Internal;
 

src/c#/GeneralUpdate.Bowl/Ipc/Environments.cs

@@ -0,0 +1,41 @@
+using System;
+using System.IO;
+using System.Security.Cryptography;
+using System.Text;
+
+namespace GeneralUpdate.Bowl.Ipc;
+
+/// <summary>
+/// Secure IPC environment variable provider.
+/// AES-encrypted temp files in a dedicated subdirectory, auto-deleted after read.
+/// </summary>
+public static class Environments
+{
+    private static readonly byte[] _aesKey = SHA256.Create()
+        .ComputeHash(Encoding.UTF8.GetBytes("GeneralUpdate.IPC.EnvironmentProvider.v1"));
+    private static readonly byte[] _aesIV = new byte[16] { 0x47, 0x55, 0x50, 0x44, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
+
+    private static string IpcDir
+    {
+        get
+        {
+            var dir = Path.Combine(Path.GetTempPath(), "GeneralUpdate", "ipc");
+            Directory.CreateDirectory(dir);
+            return dir;
+        }
+    }
+
+    public static void SetEnvironmentVariable(string key, string value)
+    {
+        var filePath = Path.Combine(IpcDir, $"{key}.enc");
+        var plainBytes = Encoding.UTF8.GetBytes(value);
+        IpcEncryption.EncryptToFile(plainBytes, filePath, _aesKey, _aesIV);
+    }
+
+    public static string GetEnvironmentVariable(string key)
+    {
+        var filePath = Path.Combine(Path.GetTempPath(), "GeneralUpdate", "ipc", $"{key}.enc");
+        var plainBytes = IpcEncryption.DecryptFromFile(filePath, _aesKey, _aesIV);
+        return plainBytes != null ? Encoding.UTF8.GetString(plainBytes) : string.Empty;
+    }
+}

src/c#/GeneralUpdate.Bowl/Ipc/IpcEncryption.cs

@@ -0,0 +1,40 @@
+using System;
+using System.IO;
+using System.Security.Cryptography;
+
+namespace GeneralUpdate.Bowl.Ipc;
+
+/// <summary>
+/// Shared AES encryption utilities for IPC.
+/// </summary>
+public static class IpcEncryption
+{
+    public static void EncryptToFile(byte[] plainBytes, string filePath, byte[] key, byte[] iv)
+    {
+        using var aes = Aes.Create();
+        aes.Key = key;
+        aes.IV = iv;
+        using var encryptor = aes.CreateEncryptor();
+        var cipher = encryptor.TransformFinalBlock(plainBytes, 0, plainBytes.Length);
+        File.WriteAllBytes(filePath, cipher);
+    }
+
+    public static byte[]? DecryptFromFile(string filePath, byte[] key, byte[] iv)
+    {
+        if (!File.Exists(filePath)) return null;
+
+        try
+        {
+            var cipher = File.ReadAllBytes(filePath);
+            using var aes = Aes.Create();
+            aes.Key = key;
+            aes.IV = iv;
+            using var decryptor = aes.CreateDecryptor();
+            return decryptor.TransformFinalBlock(cipher, 0, cipher.Length);
+        }
+        finally
+        {
+            try { File.Delete(filePath); } catch { /* best-effort cleanup */ }
+        }
+    }
+}

src/c#/GeneralUpdate.Bowl/Strategies/LinuxBowlStrategy.cs

@@ -5,7 +5,7 @@
 using System.Threading;
 using System.Threading.Tasks;
 using GeneralUpdate.Bowl.Internal;
-using GeneralUpdate.Core;
+using GeneralUpdate.Bowl;
 
 namespace GeneralUpdate.Bowl.Strategies;
 

src/c#/GeneralUpdate.Bowl/Strategies/MacBowlStrategy.cs

@@ -3,7 +3,7 @@
 using System.IO;
 using System.Threading;
 using System.Threading.Tasks;
-using GeneralUpdate.Core;
+using GeneralUpdate.Bowl;
 
 namespace GeneralUpdate.Bowl.Strategies;
 

src/c#/GeneralUpdate.Bowl/Strategies/ProcessRunner.cs

@@ -3,7 +3,7 @@
 using System.Diagnostics;
 using System.Threading;
 using System.Threading.Tasks;
-using GeneralUpdate.Core;
+using GeneralUpdate.Bowl;
 
 namespace GeneralUpdate.Bowl.Strategies;
 

src/c#/GeneralUpdate.Bowl/Strategies/WindowsBowlStrategy.cs

@@ -4,8 +4,8 @@
 using System.Runtime.InteropServices;
 using System.Threading;
 using System.Threading.Tasks;
-using GeneralUpdate.Core.FileSystem;
-using GeneralUpdate.Core;
+using GeneralUpdate.Bowl.FileSystem;
+using GeneralUpdate.Bowl;
 
 namespace GeneralUpdate.Bowl.Strategies;
 
@@ -64,7 +64,7 @@ public Task PostProcessAsync(in BowlContext context,
     private static void EnsureDirectory(string path)
     {
         if (Directory.Exists(path))
-            StorageManager.DeleteDirectory(path);
+            StorageHelper.DeleteDirectory(path);
         Directory.CreateDirectory(path);
     }
 }