feat: update Godot integration and coordinated package dependencies

.gitea/workflows/publish-nuget.yml

@@ -0,0 +1,123 @@
+name: Publish NuGet packages
+
+on:
+  push:
+    tags:
+      - 'v*'
+  workflow_dispatch:
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    env:
+      NUGET_AUTH_TOKEN: ${{ secrets.SHRINKSDK_PACKAGE_TOKEN }}
+      DOTNET_SYSTEM_GLOBALIZATION_INVARIANT: '1'
+      DOTNET_CLI_TELEMETRY_OPTOUT: '1'
+      LD_LIBRARY_PATH: /opt/dotnet-libs/usr/lib/x86_64-linux-gnu
+      SSL_CERT_FILE: /opt/ca-certificates.crt
+    steps:
+      - name: Fetch exact tagged source
+        env:
+          GITEA_REF: ${{ gitea.ref }}
+          GITEA_REPOSITORY: ${{ gitea.repository }}
+        shell: bash
+        run: |
+          set -euo pipefail
+          tag="${GITEA_REF#refs/tags/}"
+          case "$tag" in
+            v[0-9]*) ;;
+            *) echo "Expected a version tag ref, got: $GITEA_REF" >&2; exit 1 ;;
+          esac
+          export SHRINKSDK_ARCHIVE_URL="https://git.crash.work/${GITEA_REPOSITORY}/archive/${tag}.tar.gz"
+          node --input-type=module <<'NODE'
+          import { writeFile } from 'node:fs/promises';
+
+          const response = await fetch(process.env.SHRINKSDK_ARCHIVE_URL);
+          if (!response.ok) {
+            throw new Error(`Release archive download failed: ${response.status} ${response.statusText}`);
+          }
+          await writeFile('release.tar.gz', new Uint8Array(await response.arrayBuffer()));
+          NODE
+          mkdir release
+          tar -xzf release.tar.gz --strip-components=1 -C release
+          rm -f release.tar.gz
+          printf '%s' "$tag" > release/.shrink-sdk-release-tag
+
+      - name: Install .NET 8 SDK
+        shell: bash
+        run: |
+          set -euo pipefail
+          node --input-type=module <<'NODE'
+          import { writeFile } from 'node:fs/promises';
+          import { rootCertificates } from 'node:tls';
+
+          await writeFile('/opt/ca-certificates.crt', rootCertificates.join('\n'));
+
+          const metadataResponse = await fetch('https://dotnetcli.blob.core.windows.net/dotnet/release-metadata/8.0/releases.json');
+          if (!metadataResponse.ok) throw new Error(`Release metadata download failed: ${metadataResponse.status}`);
+          const metadata = await metadataResponse.json();
+          const sdkVersion = metadata['latest-sdk'];
+          const release = metadata.releases.find(item => item.sdk?.version === sdkVersion);
+          const file = release?.sdk?.files?.find(item => item.rid === 'linux-x64' && item.name.endsWith('.tar.gz'));
+          if (!file) throw new Error(`Linux x64 SDK archive not found for ${sdkVersion}`);
+          const archiveResponse = await fetch(file.url);
+          if (!archiveResponse.ok) throw new Error(`SDK download failed: ${archiveResponse.status}`);
+          await writeFile('/tmp/dotnet-sdk.tar.gz', new Uint8Array(await archiveResponse.arrayBuffer()));
+
+          const poolUrl = 'https://deb.debian.org/debian-security/pool/updates/main/o/openssl/';
+          const poolResponse = await fetch(poolUrl);
+          if (!poolResponse.ok) throw new Error(`OpenSSL package index download failed: ${poolResponse.status}`);
+          const poolIndex = await poolResponse.text();
+          const packages = [...poolIndex.matchAll(/href="(libssl3_[^"]+_amd64\.deb)"/g)].map(match => match[1]).sort();
+          const packageName = packages.at(-1);
+          if (!packageName) throw new Error('Debian libssl3 package was not found');
+          const packageResponse = await fetch(poolUrl + packageName);
+          if (!packageResponse.ok) throw new Error(`OpenSSL package download failed: ${packageResponse.status}`);
+          await writeFile('/tmp/libssl3.deb', new Uint8Array(await packageResponse.arrayBuffer()));
+          NODE
+          mkdir -p /opt/dotnet
+          tar -xzf /tmp/dotnet-sdk.tar.gz -C /opt/dotnet
+          mkdir -p /opt/dotnet-libs
+          dpkg-deb -x /tmp/libssl3.deb /opt/dotnet-libs
+          rm -f /tmp/dotnet-sdk.tar.gz
+          rm -f /tmp/libssl3.deb
+          /opt/dotnet/dotnet --info
+
+      - name: Validate, pack and publish
+        shell: bash
+        run: |
+          set -euo pipefail
+          : "${NUGET_AUTH_TOKEN:?SHRINKSDK_PACKAGE_TOKEN is required}"
+          export PATH="/opt/dotnet:$PATH"
+          cd release
+          tag="$(cat .shrink-sdk-release-tag)"
+          projects=()
+          if [[ -d DotNet~ ]]; then
+            while IFS= read -r -d '' project; do projects+=("$project"); done < <(find DotNet~ -type f -name '*.csproj' -print0)
+          fi
+          if [[ -d Godot~ ]]; then
+            while IFS= read -r -d '' project; do projects+=("$project"); done < <(find Godot~ -type f -name '*.csproj' -print0)
+          fi
+          if [[ "${#projects[@]}" -eq 0 ]]; then
+            while IFS= read -r -d '' project; do projects+=("$project"); done < <(find . -maxdepth 1 -type f -name '*.csproj' -print0)
+          fi
+          test "${#projects[@]}" -gt 0
+          if [[ -f package.json ]]; then
+            version="$(node -p "require('./package.json').version")"
+          else
+            version="$(dotnet msbuild "${projects[0]}" -getProperty:Version -nologo)"
+          fi
+          test "$tag" = "v$version"
+          mkdir -p packages
+          for project in "${projects[@]}"; do
+            dotnet restore "$project" --configfile NuGet.Config
+            dotnet pack "$project" --configuration Release --no-restore --output "$PWD/packages" --include-symbols --include-source
+          done
+          find packages -maxdepth 1 -name '*.nupkg' -type f | grep -q .
+          dotnet nuget push 'packages/*.nupkg' --api-key "$NUGET_AUTH_TOKEN" --source https://git.crash.work/api/packages/ShrinkSDK/nuget/index.json --skip-duplicate
+          if compgen -G 'packages/*.snupkg' > /dev/null; then
+            dotnet nuget push 'packages/*.snupkg' --api-key "$NUGET_AUTH_TOKEN" --source https://git.crash.work/api/packages/ShrinkSDK/nuget/index.json --skip-duplicate
+          fi

.gitignore

@@ -8,3 +8,11 @@
 /Tools~/**/[Oo]bj/
 *.user
 *.DotSettings.user
+/DotNet~/**/[Bb]in/
+/DotNet~/**/[Oo]bj/
+/Godot~/**/[Bb]in/
+/Godot~/**/[Oo]bj/
+/artifacts/
+/packages/
+!DotNet~/**/*.csproj
+!Godot~/**/*.csproj

.npmignore

@@ -6,3 +6,9 @@ Tools~/
 *.sln
 *.user
 *.DotSettings.user
+DotNet~/
+Godot~/
+NuGet.Config
+Directory.Build.props
+NuGet.Config.meta
+Directory.Build.props.meta

CHANGELOG.md

@@ -2,6 +2,18 @@
 
 本文件记录 `ShrinkDataSaver` 在当前工作区中的包内变更。
 
+## [2.5.0] - 2026-11-06
+
+### Added
+
+- `LocalStorageProvider` 新增 `LocalStorageCommitStrategy`；`RenameOnly` 通过宿主注入的覆盖移动委托提交，适用于不支持原子替换的沙箱文件系统。
+- `ShrinkDataSaverPlatform.Initialize(IStorageProvider, ...)` 与两套 `ShrinkDataSaverRuntimeConfig.Storage` 支持宿主注入存储实现。
+
+### Changed
+
+- `RenameOnly` 保留 `.bak1` / `.bak2` 两级备份，并在读取或下一次写入前从备份恢复中断的提交；孤立临时文件不会被当成完整存档。
+- `DeleteAsync` 会同时清理主文件、两级备份和临时文件。
+
 ## [2.2.2] - 2026-08-28
 
 ### Changed

Directory.Build.props

@@ -0,0 +1,13 @@
+<Project>
+  <PropertyGroup>
+    <LangVersion>latest</LangVersion>
+    <Nullable>enable</Nullable>
+    <Deterministic>true</Deterministic>
+    <ContinuousIntegrationBuild>true</ContinuousIntegrationBuild>
+    <Authors>ShrinkSDK</Authors>
+    <Company>ShrinkSDK</Company>
+    <RepositoryUrl>https://git.crash.work/ShrinkSDK</RepositoryUrl>
+    <IncludeSymbols>true</IncludeSymbols>
+    <SymbolPackageFormat>snupkg</SymbolPackageFormat>
+  </PropertyGroup>
+</Project>

Directory.Build.props.meta

@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: 5e806df0724397542b78a8347188b8bd
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

DotNet~/Runtime/ShrinkDataSaverRuntime.cs

@@ -0,0 +1,44 @@
+#nullable enable
+
+using System.IO;
+using Cysharp.Threading.Tasks;
+using ShrinkSDK.Runtime;
+
+namespace ShrinkDataSaver;
+
+public sealed class ShrinkDataSaverRuntimeConfig
+{
+    public string? RootPath { get; set; }
+    public string SaveFileExtension { get; set; } = ".sav";
+    public string SettingsFileName { get; set; } = "settings.json";
+    public int CurrentSaveVersion { get; set; } = 1;
+    public int MaxSlots { get; set; } = 3;
+    public float SettingsWriteDebounceSeconds { get; set; } = 0.35f;
+    public bool DontDestroyOnLoadDriver { get; set; }
+    public IStorageProvider? Storage { get; set; }
+}
+
+public static class ShrinkDataSaverRuntime
+{
+    public static bool IsInitialized { get; private set; }
+
+    public static void Initialize(ShrinkDataSaverRuntimeConfig? config = null)
+    {
+        if (IsInitialized) return;
+        config ??= new ShrinkDataSaverRuntimeConfig();
+        var root = string.IsNullOrWhiteSpace(config.RootPath)
+            ? ShrinkRuntimeServices.Paths.PersistentDataPath
+            : config.RootPath!;
+        Directory.CreateDirectory(root);
+        var storage = config.Storage ?? new LocalStorageProvider(root);
+        ShrinkDataSaverPlatform.SettingsWriteDebounceSeconds = config.SettingsWriteDebounceSeconds;
+        ShrinkDataSaverPlatform.MaxSlots = config.MaxSlots;
+        ShrinkSettings.Initialize(storage, Path.Combine(root, config.SettingsFileName));
+        ShrinkSave.Initialize(storage, Path.Combine(root, "saves"), config.SaveFileExtension,
+            config.CurrentSaveVersion);
+        ShrinkSettings.LoadAsync().Forget();
+        IsInitialized = true;
+        ShrinkRuntimeServices.Logger.Log(ShrinkLogLevel.Information,
+            $"[ShrinkDataSaver] Runtime initialized. Root: {root}");
+    }
+}

DotNet~/ShrinkSDK.DataSaver.csproj

@@ -0,0 +1,29 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <TargetFramework>netstandard2.1</TargetFramework>
+    <EnableDefaultCompileItems>false</EnableDefaultCompileItems>
+    <AssemblyName>ShrinkDataSaver.Runtime</AssemblyName>
+    <RootNamespace>ShrinkDataSaver</RootNamespace>
+    <PackageId>ShrinkSDK.DataSaver</PackageId>
+    <Version>2.5.0</Version>
+    <Description>ShrinkSDK engine-neutral versioned save and settings runtime.</Description>
+    <ShrinkCodeGenEnabled>false</ShrinkCodeGenEnabled>
+    <Nullable>disable</Nullable>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="Runtime\ShrinkDataSaverRuntime.cs" />
+    <Compile Include="..\Runtime\AssemblyInfo.cs" />
+    <Compile Include="..\Runtime\DataSerializer.cs" />
+    <Compile Include="..\Runtime\IStorageProvider.cs" />
+    <Compile Include="..\Runtime\LocalStorageProvider.cs" />
+    <Compile Include="..\Runtime\MigrationChain.cs" />
+    <Compile Include="..\Runtime\SaveEncryptor.cs" />
+    <Compile Include="..\Runtime\SaveTypes.cs" />
+    <Compile Include="..\Runtime\ShrinkDataSaverPlatform.cs" />
+    <Compile Include="..\Runtime\ShrinkSave.cs" />
+    <Compile Include="..\Runtime\ShrinkSettings.cs" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
+    <PackageReference Include="UniTask" Version="2.5.10" />
+    <PackageReference Include="ShrinkSDK.Runtime.Abstractions" Version="0.2.0" />
+  </ItemGroup>
+</Project>

NuGet.Config

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <packageSources>
+    <clear />
+    <add key="ShrinkSDK" value="https://git.crash.work/api/packages/ShrinkSDK/nuget/index.json" />
+    <add key="nuget.org" value="https://api.nuget.org/v3/index.json" protocolVersion="3" />
+  </packageSources>
+</configuration>

NuGet.Config.meta

@@ -0,0 +1,32 @@
+fileFormatVersion: 2
+guid: 8d396317cc7d3294683c90786f2b3289
+PluginImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  iconMap: {}
+  executionOrder: {}
+  defineConstraints: []
+  isPreloaded: 0
+  isOverridable: 0
+  isExplicitlyReferenced: 0
+  validateReferences: 1
+  platformData:
+  - first:
+      Any: 
+    second:
+      enabled: 0
+      settings: {}
+  - first:
+      Editor: Editor
+    second:
+      enabled: 0
+      settings:
+        DefaultValueInitialized: true
+  - first:
+      Windows Store Apps: WindowsStoreApps
+    second:
+      enabled: 1
+      settings: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

README.md

@@ -1,6 +1,8 @@
 # ShrinkDataSaver
 
-一个为 Unity C# 项目设计的模块化存档与设置管理系统。支持多存档槽、链式版本迁移、可选 AES-256 加密、关键模块保护、跨模块只读查询，以及完整的事件驱动架构。
+一个可用于 Unity、Godot 和普通 .NET 宿主的模块化存档与设置管理系统。支持多存档槽、链式版本迁移、可选 AES-256 加密、关键模块保护、跨模块只读查询，以及完整的事件驱动架构。
+
+Godot 和普通 .NET 项目安装 `ShrinkSDK.DataSaver`；可打包源码位于 `DotNet~`，持久化路径与生命周期由宿主平台服务注入。
 
 ## ✨ 特性概览
 
@@ -17,6 +19,7 @@
 | ⚙️ **Settings 系统** | 独立于存档的键值对设置，防抖写入，本地持久化 |
 | 🧷 **最近游玩槽位** | 自动记录最近一次成功进入的槽位，可用于“继续游戏” |
 | 🛠️ **双副本备份** | 主文件原子替换，自动保留 `.bak1` / `.bak2` 双副本轮换 |
+| 📦 **可注入存储** | 宿主可传入自定义 `IStorageProvider`，或选择 `RenameOnly` 提交策略 |
 | ☁️ **云存档兼容** | 每槽单文件 `.sav`，模块级 `EnableCloudSync` 开关 |
 | 🔗 **EventBus 集成** | 可选接入 ShrinkEventBus，所有事件自动桥接到事件总线 |
 | 🖥️ **Editor 工具** | 中文可视化调试窗口，实时查看/操作设置与存档 |
@@ -73,6 +76,16 @@ Bootstrap 会自动 `DontDestroyOnLoad`，并在应用退出 / 移动端切后
 - 如果项目接入了 `ShrinkApp`，则可由宿主统一调用 `ShrinkDataSaverRuntime.Initialize(...)`
 - 宿主已接管时，旧 bootstrap 会自动幂等退出，不重复初始化
 
+Godot 或其他 .NET 8 宿主可以注入自己的存储实现，并显式提供覆盖重命名操作。共享 netstandard2.1 库不绑定平台原生 API；缺少该操作时 `RenameOnly` 构造会失败。Godot 也可直接使用 `ShrinkGodotStorage.CreateRenameOnly(rootPath)`：
+
+```csharp
+var storage = new LocalStorageProvider(rootPath, LocalStorageCommitStrategy.RenameOnly,
+    (source, destination) => File.Move(source, destination, overwrite: true));
+ShrinkDataSaverPlatform.Initialize(storage, rootPath);
+```
+
+`ShrinkDataSaverRuntimeConfig.Storage`（Unity 与 .NET 两套运行时配置均提供）和 `ShrinkDataSaverAppModuleConfig` 也支持传入自定义存储。`RenameOnly` 适合不支持原子替换的沙箱文件系统；它仍保留 `.bak1` / `.bak2`，并会在读取或下一次写入前恢复中断的提交。
+
 ### 第三步：注册存档模块
 
 ```csharp
@@ -527,7 +540,7 @@ await ShrinkSave.LoadSlotAsync(slotIndex, key);
 
 - **模块注册顺序无关**：`SaveSlotAsync` 序列化所有已注册模块，`LoadSlotAsync` 分发到对应模块，缺失的模块会跳过但不会导致加载失败。
 - **宿主接管兼容**：如果项目接入了 `ShrinkApp`，推荐通过 `ShrinkDataSaver.Integration.App` 让宿主统一初始化，而不是继续依赖场景 bootstrap。
-- **写入原子性**：`LocalStorageProvider` 先异步写入 `.tmp` 临时文件，再通过原子替换提交主文件，并自动轮换 `.bak1` / `.bak2` 两份备份。
+- **写入原子性**：`LocalStorageProvider` 先异步写入 `.tmp` 临时文件，再按 `FileReplace` 或 `RenameOnly` 策略提交主文件，并自动轮换 `.bak1` / `.bak2` 两份备份。
 - **读取恢复**：`ShrinkSave` 与 `ShrinkSettings` 读取主文件失败时，会自动回退到 `.bak1`、`.bak2`，并在成功后修复主文件。
 - **Settings 防抖**：`Set()` 调用后不立刻写磁盘，在 300ms（可配置）内连续调用只触发一次写入。退出时强制跳过防抖直接写入。
 - **加密密钥管理**：框架不存储密钥。密钥丢失则对应存档无法解密，建议在 UI 层给玩家明确提示。
@@ -540,3 +553,13 @@ await ShrinkSave.LoadSlotAsync(slotIndex, key);
 ## 📄 License
 
 [MIT](LICENSE)
+
+## 可复用能力
+
+<!-- shrink:capabilities -->
+Capability: 模块化存档、槽位、设置、迁移、加密和损坏备份恢复
+Aliases: 存储 存档 保存 读档 设置 持久化 save
+Limits: 模块负责采集一致状态；后台不得读取 Unity 对象；不会自动保存任意游戏字段
+Extension: 存档模块注册、序列化器、迁移链与平台路径服务
+Evidence: [ShrinkSave](Runtime/ShrinkSave.cs); [ShrinkDataSaverRuntime](DotNet~/Runtime/ShrinkDataSaverRuntime.cs)
+<!-- /shrink:capabilities -->

Runtime/LocalStorageProvider.cs

@@ -3,11 +3,17 @@ using System.Collections.Concurrent;
 using System.IO;
 using System.Linq;
 using System.Threading;
+using System.Threading.Tasks;
 using Cysharp.Threading.Tasks;
-using UnityEngine;
 
 namespace ShrinkDataSaver
 {
+    public enum LocalStorageCommitStrategy
+    {
+        FileReplace = 0,
+        RenameOnly = 1
+    }
+
     public class LocalStorageProvider : IStorageProvider
     {
         private const string BackupPrimarySuffix = ".bak1";
@@ -18,12 +24,37 @@ namespace ShrinkDataSaver
             new(StringComparer.OrdinalIgnoreCase);
 
         private readonly string _rootPath;
+        private readonly LocalStorageCommitStrategy _commitStrategy;
+        private readonly Action<string, string> _overwriteMove;
 
         public LocalStorageProvider(string rootPath = null)
+            : this(rootPath, LocalStorageCommitStrategy.FileReplace)
         {
-            _rootPath = rootPath ?? Application.persistentDataPath;
         }
 
+        public LocalStorageProvider(string rootPath, LocalStorageCommitStrategy commitStrategy)
+            : this(rootPath, commitStrategy, null)
+        {
+        }
+
+        public LocalStorageProvider(string rootPath, LocalStorageCommitStrategy commitStrategy,
+            Action<string, string> overwriteMove)
+        {
+            if (!Enum.IsDefined(typeof(LocalStorageCommitStrategy), commitStrategy))
+                throw new ArgumentOutOfRangeException(nameof(commitStrategy));
+            if (commitStrategy == LocalStorageCommitStrategy.RenameOnly && overwriteMove == null)
+                throw new ArgumentException("RenameOnly requires an overwrite-rename implementation.", nameof(overwriteMove));
+            _overwriteMove = overwriteMove;
+            _rootPath = rootPath ?? ShrinkDataSaverPlatform.Paths?.PersistentDataPath
+#if UNITY_5_3_OR_NEWER
+                ?? UnityEngine.Application.persistentDataPath
+#endif
+                ?? throw new InvalidOperationException("ShrinkDataSaver persistent path is not configured.");
+            _commitStrategy = commitStrategy;
+        }
+
+        public LocalStorageCommitStrategy CommitStrategy => _commitStrategy;
+
         private string Resolve(string path) =>
             Path.IsPathRooted(path) ? path : Path.Combine(_rootPath, path);
 
@@ -33,51 +64,29 @@ namespace ShrinkDataSaver
             var dir = Path.GetDirectoryName(fullPath);
             if (!string.IsNullOrEmpty(dir))
             {
-                await UniTask.RunOnThreadPool(() => Directory.CreateDirectory(dir), cancellationToken: ct);
+                await Task.Run(() => Directory.CreateDirectory(dir), ct);
             }
 
-            var tempPath = fullPath + TempWriteSuffix;
-            var backupPath = fullPath + BackupPrimarySuffix;
-            var secondaryBackupPath = fullPath + BackupSecondarySuffix;
             var pathLock = GetPathLock(fullPath);
-
             await pathLock.WaitAsync(ct);
             try
+            {
+                await Task.Run(() => RecoverInterruptedWrite(fullPath), CancellationToken.None);
+                ct.ThrowIfCancellationRequested();
+
+                var tempPath = fullPath + TempWriteSuffix;
+                try
                 {
                     await WriteFileBytesAsync(tempPath, data, ct);
-                await UniTask.RunOnThreadPool(() =>
-                {
-                    if (File.Exists(fullPath))
-                    {
-                        if (File.Exists(secondaryBackupPath))
-                        {
-                            File.Delete(secondaryBackupPath);
-                        }
-
-                        if (File.Exists(backupPath))
-                        {
-                            File.Move(backupPath, secondaryBackupPath);
-                        }
-
-                        File.Replace(tempPath, fullPath, backupPath, true);
-                    }
-                    else
-                    {
-                        File.Move(tempPath, fullPath);
-                    }
-                }, cancellationToken: ct);
+                    ct.ThrowIfCancellationRequested();
+                    await Task.Run(() => Commit(tempPath, fullPath), CancellationToken.None);
                 }
                 catch
                 {
-                await UniTask.RunOnThreadPool(() =>
-                {
-                    if (File.Exists(tempPath))
-                    {
-                        File.Delete(tempPath);
-                    }
-                }, cancellationToken: CancellationToken.None);
+                    await Task.Run(() => TryDelete(tempPath), CancellationToken.None);
                     throw;
                 }
+            }
             finally
             {
                 pathLock.Release();
@@ -91,6 +100,7 @@ namespace ShrinkDataSaver
             await pathLock.WaitAsync(ct);
             try
             {
+                await Task.Run(() => RecoverInterruptedWrite(fullPath), CancellationToken.None);
                 if (!File.Exists(fullPath))
                 {
                     throw new FileNotFoundException($"ShrinkDataSaver: file not found: {fullPath}");
@@ -104,8 +114,23 @@ namespace ShrinkDataSaver
             }
         }
 
-        public UniTask<bool> ExistsAsync(string path, CancellationToken ct = default) =>
-            UniTask.RunOnThreadPool(() => File.Exists(Resolve(path)), cancellationToken: ct);
+        public async UniTask<bool> ExistsAsync(string path, CancellationToken ct = default) =>
+            await ExistsCoreAsync(Resolve(path), ct);
+
+        private async UniTask<bool> ExistsCoreAsync(string fullPath, CancellationToken ct)
+        {
+            var pathLock = GetPathLock(fullPath);
+            await pathLock.WaitAsync(ct);
+            try
+            {
+                await Task.Run(() => RecoverInterruptedWrite(fullPath), CancellationToken.None);
+                return File.Exists(fullPath);
+            }
+            finally
+            {
+                pathLock.Release();
+            }
+        }
 
         public async UniTask DeleteAsync(string path, CancellationToken ct = default)
         {
@@ -114,13 +139,13 @@ namespace ShrinkDataSaver
             await pathLock.WaitAsync(ct);
             try
             {
-                await UniTask.RunOnThreadPool(() =>
-                {
-                    if (File.Exists(fullPath))
+                await Task.Run(() =>
                 {
+                    File.Delete(fullPath + TempWriteSuffix);
+                    File.Delete(fullPath + BackupPrimarySuffix);
+                    File.Delete(fullPath + BackupSecondarySuffix);
                     File.Delete(fullPath);
-                    }
-                }, cancellationToken: ct);
+                }, ct);
             }
             finally
             {
@@ -130,7 +155,7 @@ namespace ShrinkDataSaver
 
         public async UniTask<string[]> ListAsync(string prefix = "", CancellationToken ct = default)
         {
-            return await UniTask.RunOnThreadPool(() =>
+            return await Task.Run(() =>
             {
                 var dir = string.IsNullOrEmpty(prefix) ? _rootPath : Path.Combine(_rootPath, prefix);
                 if (!Directory.Exists(dir))
@@ -141,7 +166,105 @@ namespace ShrinkDataSaver
                 return Directory.GetFiles(dir)
                     .Select(f => Path.GetRelativePath(_rootPath, f))
                     .ToArray();
-            }, cancellationToken: ct);
+            }, ct);
+        }
+
+        private void Commit(string tempPath, string fullPath)
+        {
+            if (_commitStrategy == LocalStorageCommitStrategy.RenameOnly)
+                CommitRenameOnly(tempPath, fullPath);
+            else
+                CommitFileReplace(tempPath, fullPath);
+        }
+
+        private static void CommitFileReplace(string tempPath, string fullPath)
+        {
+            var backupPath = fullPath + BackupPrimarySuffix;
+            var secondaryBackupPath = fullPath + BackupSecondarySuffix;
+            if (!File.Exists(fullPath))
+            {
+                File.Move(tempPath, fullPath);
+                return;
+            }
+
+            if (File.Exists(secondaryBackupPath))
+            {
+                File.Delete(secondaryBackupPath);
+            }
+
+            if (File.Exists(backupPath))
+            {
+                File.Move(backupPath, secondaryBackupPath);
+            }
+
+            File.Replace(tempPath, fullPath, backupPath, true);
+        }
+
+        private void CommitRenameOnly(string tempPath, string fullPath)
+        {
+            var backupPath = fullPath + BackupPrimarySuffix;
+            var secondaryBackupPath = fullPath + BackupSecondarySuffix;
+            if (File.Exists(fullPath))
+            {
+                if (File.Exists(backupPath))
+                {
+                    if (File.Exists(secondaryBackupPath))
+                    {
+                        File.Delete(secondaryBackupPath);
+                    }
+
+                    MoveFileReplacing(backupPath, secondaryBackupPath);
+                }
+
+                MoveFileReplacing(fullPath, backupPath);
+            }
+
+            MoveFileReplacing(tempPath, fullPath);
+        }
+
+        private void RecoverInterruptedWrite(string fullPath)
+        {
+            if (_commitStrategy != LocalStorageCommitStrategy.RenameOnly)
+                return;
+
+            var tempPath = fullPath + TempWriteSuffix;
+            var primaryBackupPath = fullPath + BackupPrimarySuffix;
+            var secondaryBackupPath = fullPath + BackupSecondarySuffix;
+            if (!File.Exists(fullPath))
+            {
+                if (File.Exists(primaryBackupPath))
+                {
+                    MoveFileReplacing(primaryBackupPath, fullPath);
+                }
+                else if (File.Exists(secondaryBackupPath))
+                {
+                    MoveFileReplacing(secondaryBackupPath, fullPath);
+                }
+            }
+
+            if (File.Exists(tempPath))
+            {
+                TryDelete(tempPath);
+            }
+        }
+
+        private void MoveFileReplacing(string source, string destination) => _overwriteMove(source, destination);
+
+        private static void TryDelete(string path)
+        {
+            try
+            {
+                if (File.Exists(path))
+                {
+                    File.Delete(path);
+                }
+            }
+            catch (IOException)
+            {
+            }
+            catch (UnauthorizedAccessException)
+            {
+            }
         }
 
         private static SemaphoreSlim GetPathLock(string fullPath)

Runtime/MigrationChain.cs

@@ -1,7 +1,6 @@
 using System;
 using System.Collections.Generic;
 using Newtonsoft.Json.Linq;
-using UnityEngine;
 
 namespace ShrinkDataSaver
 {
@@ -33,7 +32,7 @@ namespace ShrinkDataSaver
             {
                 if (!Migrations.TryGetValue(version, out var migration))
                 {
-                    Debug.LogWarning($"[ShrinkDataSaver] 未找到 v{version} → v{version + 1} 的迁移逻辑，数据可能不完整。");
+                    ShrinkDataSaverPlatform.Warning($"[ShrinkDataSaver] 未找到 v{version} → v{version + 1} 的迁移逻辑，数据可能不完整。");
                     break;
                 }
 
@@ -42,11 +41,11 @@ namespace ShrinkDataSaver
                     var fromV = version;
                     data = migration.Migrate(data) ?? data;
                     version = migration.ToVersion;
-                    Debug.Log($"[ShrinkDataSaver] 存档已迁移 v{fromV} → v{version}");
+                    ShrinkDataSaverPlatform.Info($"[ShrinkDataSaver] 存档已迁移 v{fromV} → v{version}");
                 }
                 catch (Exception e)
                 {
-                    Debug.LogError(
+                    ShrinkDataSaverPlatform.Error(
                         $"[ShrinkDataSaver] 迁移 v{version} → v{migration.ToVersion} 失败: {e.Message}，已回滚至 v{currentVersion}");
                     return (backup, currentVersion);
                 }

Runtime/SaveTypes.cs

@@ -59,11 +59,28 @@ namespace ShrinkDataSaver
     }
 
 
+    public sealed class SavePhaseTimings
+    {
+        public double CaptureMilliseconds { get; internal set; }
+        public double EncodeMilliseconds { get; internal set; }
+        public double EncryptMilliseconds { get; internal set; }
+        public double WriteMilliseconds { get; internal set; }
+        public long EncodedBytes { get; internal set; }
+    }
+
     public class SaveOptions
     {
+        /// <summary>Only the detached JToken snapshot is encoded off-thread; module capture stays on the caller thread.</summary>
+        public bool EncodeInBackground = false;
+        public bool CollectTimings = false;
+        public SavePhaseTimings LastTimings { get; internal set; }
         public string SlotName = "New Save";
         public bool CaptureScreenshot = false;
+#if UNITY_5_3_OR_NEWER
         public UnityEngine.Texture2D Screenshot = null;
+#else
+        public byte[] Screenshot;
+#endif
         public bool Encrypt = false;
         public string EncryptionKey = null;
     }

Runtime/ShrinkDataSaver.Runtime.asmdef

@@ -3,7 +3,8 @@
   "rootNamespace": "ShrinkDataSaver",
   "references": [
     "UniTask",
-    "Newtonsoft.Json"
+    "Newtonsoft.Json",
+    "ShrinkRuntime.Abstractions"
   ],
   "optionalUnityReferences": [],
   "includePlatforms": [],

Runtime/ShrinkDataSaverPlatform.cs

@@ -0,0 +1,105 @@
+#nullable enable
+
+using System;
+using ShrinkSDK.Runtime;
+
+namespace ShrinkDataSaver
+{
+    public static class ShrinkDataSaverPlatform
+    {
+        public static IShrinkLogger? Logger { get; private set; }
+        public static IShrinkClock? Clock { get; private set; }
+        public static IShrinkPathProvider? Paths { get; private set; }
+        public static IShrinkScreenshotProvider? Screenshots { get; private set; }
+        public static float SettingsWriteDebounceSeconds { get; set; } = 0.5f;
+        public static int MaxSlots { get; set; }
+
+        public static void Configure(IShrinkPathProvider paths, IShrinkClock clock,
+            IShrinkLogger? logger = null, IShrinkScreenshotProvider? screenshots = null)
+        {
+            Paths = paths ?? throw new ArgumentNullException(nameof(paths));
+            Clock = clock ?? throw new ArgumentNullException(nameof(clock));
+            Logger = logger;
+            Screenshots = screenshots;
+        }
+
+        public static void Initialize(string? rootPath = null, string saveFileExtension = ".json",
+            string settingsFileName = "settings.json", int currentSaveVersion = 1)
+        {
+            rootPath ??= Paths?.PersistentDataPath;
+#if UNITY_5_3_OR_NEWER
+            rootPath ??= UnityEngine.Application.persistentDataPath;
+#endif
+            if (string.IsNullOrWhiteSpace(rootPath))
+                throw new InvalidOperationException("ShrinkDataSaver platform paths are not configured.");
+            var storage = new LocalStorageProvider(rootPath);
+            Initialize(storage, rootPath, saveFileExtension, settingsFileName, currentSaveVersion);
+        }
+
+        public static void Initialize(IStorageProvider storage, string? rootPath = null,
+            string saveFileExtension = ".json", string settingsFileName = "settings.json",
+            int currentSaveVersion = 1)
+        {
+            if (storage == null)
+                throw new ArgumentNullException(nameof(storage));
+
+            rootPath ??= Paths?.PersistentDataPath;
+#if UNITY_5_3_OR_NEWER
+            rootPath ??= UnityEngine.Application.persistentDataPath;
+#endif
+            var settingsPath = string.IsNullOrWhiteSpace(rootPath)
+                ? settingsFileName
+                : System.IO.Path.Combine(rootPath, settingsFileName);
+            var savesDir = string.IsNullOrWhiteSpace(rootPath)
+                ? "saves"
+                : System.IO.Path.Combine(rootPath, "saves");
+            ShrinkSettings.Initialize(storage, settingsPath);
+            ShrinkSave.Initialize(storage, savesDir, saveFileExtension, currentSaveVersion);
+        }
+
+        internal static double TimeSeconds
+        {
+            get
+            {
+                if (Clock != null) return Clock.UnscaledTimeSeconds;
+#if UNITY_5_3_OR_NEWER
+                return UnityEngine.Time.realtimeSinceStartupAsDouble;
+#else
+                return 0d;
+#endif
+            }
+        }
+
+        internal static void Info(string message)
+        {
+            if (Logger != null) Logger.Log(ShrinkLogLevel.Information, message);
+#if UNITY_5_3_OR_NEWER
+            else UnityEngine.Debug.Log(message);
+#endif
+        }
+
+        internal static void Warning(string message)
+        {
+            if (Logger != null) Logger.Log(ShrinkLogLevel.Warning, message);
+#if UNITY_5_3_OR_NEWER
+            else UnityEngine.Debug.LogWarning(message);
+#endif
+        }
+
+        internal static void Error(string message)
+        {
+            if (Logger != null) Logger.Log(ShrinkLogLevel.Error, message);
+#if UNITY_5_3_OR_NEWER
+            else UnityEngine.Debug.LogError(message);
+#endif
+        }
+
+        internal static void Exception(Exception exception)
+        {
+            if (Logger != null) Logger.Log(ShrinkLogLevel.Error, exception.Message, exception);
+#if UNITY_5_3_OR_NEWER
+            else UnityEngine.Debug.LogException(exception);
+#endif
+        }
+    }
+}

Runtime/ShrinkDataSaverPlatform.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: eab4e1dc3c9ba874896f3ec4f39a7ab7
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/ShrinkDataSaverRuntime.cs

@@ -11,6 +11,7 @@ namespace ShrinkDataSaver
         public ShrinkDataSaverSettings? SettingsOverride { get; set; }
         public int CurrentSaveVersion { get; set; } = 1;
         public bool DontDestroyOnLoadDriver { get; set; } = true;
+        public IStorageProvider? Storage { get; set; }
     }
 
     public static class ShrinkDataSaverRuntime
@@ -36,7 +37,10 @@ namespace ShrinkDataSaver
 
             var savesDir = Path.Combine(rootPath, "saves");
             var settingsPath = Path.Combine(rootPath, cfg.settingsFileName);
-            var storage = new LocalStorageProvider(rootPath);
+            var storage = config.Storage ?? new LocalStorageProvider(rootPath);
+
+            ShrinkDataSaverPlatform.SettingsWriteDebounceSeconds = cfg.settingsWriteDebounceSeconds;
+            ShrinkDataSaverPlatform.MaxSlots = cfg.maxSlots;
 
             ShrinkSettings.Initialize(storage, settingsPath);
             ShrinkSave.Initialize(storage, savesDir, cfg.saveFileExtension, config.CurrentSaveVersion);

Runtime/ShrinkSave.cs

@@ -1,10 +1,14 @@
 using System;
 using System.Collections.Generic;
 using System.IO;
+using System.Diagnostics;
+using System.Threading.Tasks;
 using System.Threading;
 using Cysharp.Threading.Tasks;
 using Newtonsoft.Json.Linq;
+#if UNITY_5_3_OR_NEWER
 using UnityEngine;
+#endif
 
 namespace ShrinkDataSaver
 {
@@ -141,7 +145,7 @@ namespace ShrinkDataSaver
                 }
                 catch (Exception e)
                 {
-                    Debug.LogWarning($"[ShrinkDataSaver] 读取元数据失败 slot_{slotIndex}: {e.Message}");
+                    ShrinkDataSaverPlatform.Warning($"[ShrinkDataSaver] 读取元数据失败 slot_{slotIndex}: {e.Message}");
                 }
             }
 
@@ -181,6 +185,14 @@ namespace ShrinkDataSaver
         {
             options ??= new SaveOptions();
             ValidateSlotIndex(slotIndex);
+            ct.ThrowIfCancellationRequested();
+            var timings = options.CollectTimings ? new SavePhaseTimings() : null;
+            options.LastTimings = timings;
+            var captureStarted = Stopwatch.GetTimestamp();
+            var encrypt = options.Encrypt;
+            var encryptionKey = options.EncryptionKey;
+            var encodeInBackground = options.EncodeInBackground;
+            var storage = _storage;
 
             var timestamp = DateTimeOffset.UtcNow.ToUnixTimeSeconds();
             OnSaveStarted?.Invoke(new SaveStartedEventArgs { SlotIndex = slotIndex, Timestamp = timestamp });
@@ -196,11 +208,15 @@ namespace ShrinkDataSaver
                         SaveVersion = _currentSaveVersion,
                         LastModified = timestamp,
                         PlaytimeSeconds = GetCurrentPlaytime(),
-                        IsEncrypted = options.Encrypt
+                        IsEncrypted = encrypt
                     }
                 };
 
+#if UNITY_5_3_OR_NEWER
                 if (options.Screenshot || options.CaptureScreenshot)
+#else
+                if (options.Screenshot != null || options.CaptureScreenshot)
+#endif
                 {
                     packet.Meta.ScreenshotBase64 = await CaptureScreenshotAsync(options, ct);
                 }
@@ -223,28 +239,39 @@ namespace ShrinkDataSaver
                             throw new InvalidOperationException($"关键模块 '{module.Key}' 序列化失败: {e.Message}", e);
                         }
 
-                        Debug.LogError($"[ShrinkDataSaver] 模块 '{module.Key}' 序列化失败（已跳过）: {e.Message}");
+                        ShrinkDataSaverPlatform.Error($"[ShrinkDataSaver] 模块 '{module.Key}' 序列化失败（已跳过）: {e.Message}");
                     }
                 }
 
-                if (options.Encrypt)
+                if (timings != null) timings.CaptureMilliseconds = PhaseElapsed(captureStarted);
+                ct.ThrowIfCancellationRequested();
+                // Modules have been materialized as private JSON tokens; the worker never touches providers or engine objects.
+                byte[] Encode()
                 {
-                    if (string.IsNullOrEmpty(options.EncryptionKey))
+                    ct.ThrowIfCancellationRequested();
+                    var stage = Stopwatch.GetTimestamp();
+                    if (encrypt)
                     {
-                        throw new ArgumentException("EncryptionKey missing.");
-                    }
-
+                        if (string.IsNullOrEmpty(encryptionKey)) throw new ArgumentException("EncryptionKey missing.");
                         var modulesBytes = DataSerializer.Serialize(modulesDict);
-                    var encryptedBytes = SaveEncryptor.Encrypt(modulesBytes, options.EncryptionKey);
+                        if (timings != null) timings.EncodeMilliseconds += PhaseElapsed(stage);
+                        stage = Stopwatch.GetTimestamp();
+                        var encryptedBytes = SaveEncryptor.Encrypt(modulesBytes, encryptionKey);
+                        if (timings != null) timings.EncryptMilliseconds = PhaseElapsed(stage);
                         packet.EncryptedModules = Convert.ToBase64String(encryptedBytes);
                     }
-                else
-                {
-                    packet.Modules = modulesDict;
+                    else packet.Modules = modulesDict;
+                    ct.ThrowIfCancellationRequested();
+                    stage = Stopwatch.GetTimestamp();
+                    var bytes = DataSerializer.Serialize(packet);
+                    if (timings != null) { timings.EncodeMilliseconds += PhaseElapsed(stage); timings.EncodedBytes = bytes.Length; }
+                    return bytes;
                 }
-
-                var finalBytes = DataSerializer.Serialize(packet);
-                await _storage.WriteAsync(SlotPath(slotIndex), finalBytes, ct);
+                var finalBytes = encodeInBackground ? await Task.Run(Encode, ct) : Encode();
+                ct.ThrowIfCancellationRequested();
+                var writeStarted = Stopwatch.GetTimestamp();
+                await storage.WriteAsync(SlotPath(slotIndex), finalBytes, ct);
+                if (timings != null) timings.WriteMilliseconds = PhaseElapsed(writeStarted);
 
                 OnSaveCompleted?.Invoke(new SaveCompletedEventArgs
                 {
@@ -252,7 +279,7 @@ namespace ShrinkDataSaver
                     ModuleNames = moduleNames.ToArray(),
                     Timestamp = timestamp
                 });
-                Debug.Log($"[ShrinkDataSaver] 槽位 {slotIndex} 已保存。({moduleNames.Count} 个模块)");
+                ShrinkDataSaverPlatform.Info($"[ShrinkDataSaver] 槽位 {slotIndex} 已保存。({moduleNames.Count} 个模块)");
             }
             catch (Exception e)
             {
@@ -265,6 +292,8 @@ namespace ShrinkDataSaver
             }
         }
 
+        private static double PhaseElapsed(long started) => (Stopwatch.GetTimestamp() - started) * 1000d / Stopwatch.Frequency;
+
         public static async UniTask LoadSlotAsync(int slotIndex, string decryptionKey = null, CancellationToken ct = default)
         {
             var timestamp = DateTimeOffset.UtcNow.ToUnixTimeSeconds();
@@ -293,13 +322,13 @@ namespace ShrinkDataSaver
                     }
                     catch (Exception e)
                     {
-                        Debug.LogError($"[ShrinkDataSaver] 反序列化模块 '{module.Key}' 失败: {e.Message}");
+                        ShrinkDataSaverPlatform.Error($"[ShrinkDataSaver] 反序列化模块 '{module.Key}' 失败: {e.Message}");
                     }
                 }
 
                 _loadedSlot = slotIndex;
                 _storedPlaytime = packet.Meta.PlaytimeSeconds;
-                _sessionStart = Time.realtimeSinceStartup;
+                _sessionStart = (float)ShrinkDataSaverPlatform.TimeSeconds;
                 await PersistRecentSlotIndexAsync(slotIndex, ct);
 
                 OnLoadCompleted?.Invoke(new LoadCompletedEventArgs
@@ -309,7 +338,7 @@ namespace ShrinkDataSaver
                     Version = packet.Meta.SaveVersion,
                     Timestamp = timestamp
                 });
-                Debug.Log($"[ShrinkDataSaver] 槽位 {slotIndex} 已加载。(v{packet.Meta.SaveVersion}, {moduleNames.Count} 个模块)");
+                ShrinkDataSaverPlatform.Info($"[ShrinkDataSaver] 槽位 {slotIndex} 已加载。(v{packet.Meta.SaveVersion}, {moduleNames.Count} 个模块)");
             }
             catch (Exception e)
             {
@@ -344,7 +373,7 @@ namespace ShrinkDataSaver
             }
 
             OnDeleteCompleted?.Invoke(new SlotDeletedEventArgs { SlotIndex = slotIndex });
-            Debug.Log($"[ShrinkDataSaver] 槽位 {slotIndex} 已删除。");
+            ShrinkDataSaverPlatform.Info($"[ShrinkDataSaver] 槽位 {slotIndex} 已删除。");
         }
 
         public static float GetMinAutoSaveInterval()
@@ -355,7 +384,7 @@ namespace ShrinkDataSaver
             {
                 if (cfg.AutoSaveIntervalSeconds > 0f)
                 {
-                    min = Mathf.Min(min, cfg.AutoSaveIntervalSeconds);
+                    min = Math.Min(min, cfg.AutoSaveIntervalSeconds);
                     hasAny = true;
                 }
             }
@@ -406,7 +435,11 @@ namespace ShrinkDataSaver
                 throw new ArgumentOutOfRangeException(nameof(slotIndex), "槽位索引不能为负数。");
             }
 
+#if UNITY_5_3_OR_NEWER
             var max = ShrinkDataSaverSettings.Instance.maxSlots;
+#else
+            var max = ShrinkDataSaverPlatform.MaxSlots;
+#endif
             if (max > 0 && slotIndex >= max)
             {
                 throw new ArgumentOutOfRangeException(nameof(slotIndex), $"超出最大槽位数 ({max})。");
@@ -529,7 +562,7 @@ namespace ShrinkDataSaver
 
                     if (!string.Equals(candidatePath, primaryPath, StringComparison.Ordinal))
                     {
-                        Debug.LogWarning($"[ShrinkDataSaver] 槽位 {slotIndex} 主文件损坏或缺失，已从备份恢复：{candidatePath}");
+                        ShrinkDataSaverPlatform.Warning($"[ShrinkDataSaver] 槽位 {slotIndex} 主文件损坏或缺失，已从备份恢复：{candidatePath}");
                         await _storage.WriteAsync(primaryPath, bytes, ct);
                     }
 
@@ -538,7 +571,7 @@ namespace ShrinkDataSaver
                 catch (Exception ex)
                 {
                     lastError = ex;
-                    Debug.LogWarning($"[ShrinkDataSaver] 读取槽位副本失败：{candidatePath} / {ex.Message}");
+                    ShrinkDataSaverPlatform.Warning($"[ShrinkDataSaver] 读取槽位副本失败：{candidatePath} / {ex.Message}");
                 }
             }
 
@@ -612,7 +645,7 @@ namespace ShrinkDataSaver
 
                     if (!string.Equals(candidatePath, primaryPath, StringComparison.Ordinal))
                     {
-                        Debug.LogWarning($"[ShrinkDataSaver] 槽位 {slotIndex} 主文件损坏或缺失，已从备份恢复：{candidatePath}");
+                        ShrinkDataSaverPlatform.Warning($"[ShrinkDataSaver] 槽位 {slotIndex} 主文件损坏或缺失，已从备份恢复：{candidatePath}");
                         await _storage.WriteAsync(primaryPath, bytes, ct);
                     }
 
@@ -621,7 +654,7 @@ namespace ShrinkDataSaver
                 catch (Exception ex)
                 {
                     lastError = ex;
-                    Debug.LogWarning($"[ShrinkDataSaver] 加载槽位副本失败：{candidatePath} / {ex.Message}");
+                    ShrinkDataSaverPlatform.Warning($"[ShrinkDataSaver] 加载槽位副本失败：{candidatePath} / {ex.Message}");
                 }
             }
 
@@ -633,10 +666,11 @@ namespace ShrinkDataSaver
             throw new FileNotFoundException($"槽位 {slotIndex} 不存在。");
         }
 
-        private static float GetCurrentPlaytime() => _loadedSlot < 0 ? 0f : _storedPlaytime + (Time.realtimeSinceStartup - _sessionStart);
+        private static float GetCurrentPlaytime() => _loadedSlot < 0 ? 0f : _storedPlaytime + ((float)ShrinkDataSaverPlatform.TimeSeconds - _sessionStart);
 
         private static async UniTask<string> CaptureScreenshotAsync(SaveOptions options, CancellationToken ct)
         {
+#if UNITY_5_3_OR_NEWER
             var tex = options.Screenshot;
             if (!tex && options.CaptureScreenshot)
             {
@@ -668,6 +702,16 @@ namespace ShrinkDataSaver
             }
 
             return Convert.ToBase64String(tex.EncodeToJPG(75));
+#else
+            var pngBytes = options.Screenshot;
+            if (pngBytes == null && options.CaptureScreenshot)
+            {
+                var provider = ShrinkDataSaverPlatform.Screenshots ??
+                    throw new InvalidOperationException("Screenshot capture was requested but no platform provider is configured.");
+                pngBytes = await provider.CapturePngAsync(ct);
+            }
+            return pngBytes == null ? string.Empty : Convert.ToBase64String(pngBytes);
+#endif
         }
     }
 }

Runtime/ShrinkSettings.cs

@@ -1,9 +1,9 @@
 using System;
 using System.Collections.Generic;
 using System.Threading;
+using System.Threading.Tasks;
 using Cysharp.Threading.Tasks;
 using Newtonsoft.Json.Linq;
-using UnityEngine;
 
 namespace ShrinkDataSaver
 {
@@ -112,7 +112,7 @@ namespace ShrinkDataSaver
 
             if (_watchers.TryGetValue(key, out var list))
                 foreach (var cb in list)
-                    try { cb(value); } catch (Exception e) { Debug.LogException(e); }
+                    try { cb(value); } catch (Exception e) { ShrinkDataSaverPlatform.Exception(e); }
         }
 
         private static async UniTaskVoid ScheduleWrite()
@@ -123,12 +123,12 @@ namespace ShrinkDataSaver
 
             try
             {
-                var delay = (int)(ShrinkDataSaverSettings.Instance.settingsWriteDebounceSeconds * 1000);
-                await UniTask.Delay(delay, cancellationToken: token);
+                var delay = (int)(ShrinkDataSaverPlatform.SettingsWriteDebounceSeconds * 1000);
+                await Task.Delay(delay, token);
                 await SaveAsync(token);
             }
             catch (OperationCanceledException) { }
-            catch (Exception e) { Debug.LogException(e); }
+            catch (Exception e) { ShrinkDataSaverPlatform.Exception(e); }
         }
 
         private static async UniTask<SettingsData> TryLoadWithFallbackAsync(CancellationToken ct)
@@ -149,7 +149,7 @@ namespace ShrinkDataSaver
                     var loaded = DataSerializer.Deserialize<SettingsData>(bytes) ?? new SettingsData();
                     if (!string.Equals(candidatePath, primaryPath, StringComparison.Ordinal))
                     {
-                        Debug.LogWarning($"[ShrinkDataSaver] Settings 主文件损坏或缺失，已从备份恢复：{candidatePath}");
+                        ShrinkDataSaverPlatform.Warning($"[ShrinkDataSaver] Settings 主文件损坏或缺失，已从备份恢复：{candidatePath}");
                         await _storage.WriteAsync(primaryPath, bytes, ct);
                     }
 
@@ -158,13 +158,13 @@ namespace ShrinkDataSaver
                 catch (Exception ex)
                 {
                     lastError = ex;
-                    Debug.LogWarning($"[ShrinkDataSaver] 读取 Settings 副本失败：{candidatePath} / {ex.Message}");
+                    ShrinkDataSaverPlatform.Warning($"[ShrinkDataSaver] 读取 Settings 副本失败：{candidatePath} / {ex.Message}");
                 }
             }
 
             if (lastError != null)
             {
-                Debug.LogWarning("[ShrinkDataSaver] 所有 Settings 副本均不可用，已回退为空设置。");
+                ShrinkDataSaverPlatform.Warning("[ShrinkDataSaver] 所有 Settings 副本均不可用，已回退为空设置。");
             }
 
             return new SettingsData();

Tests/LocalStorageProviderStrategyTests.cs

@@ -0,0 +1,239 @@
+using System;
+using System.Collections;
+using System.IO;
+using System.Text;
+using System.Threading.Tasks;
+using Cysharp.Threading.Tasks;
+using NUnit.Framework;
+using UnityEngine.TestTools;
+
+namespace ShrinkDataSaver.Tests
+{
+    [TestFixture]
+    public class LocalStorageProviderStrategyTests
+    {
+        private string _rootPath;
+
+        [SetUp]
+        public void SetUp()
+        {
+            _rootPath = Path.Combine(Path.GetTempPath(), $"ShrinkDataSaverStrategyTests_{Guid.NewGuid():N}");
+            Directory.CreateDirectory(_rootPath);
+        }
+
+        [TearDown]
+        public void TearDown()
+        {
+            if (Directory.Exists(_rootPath))
+            {
+                Directory.Delete(_rootPath, true);
+            }
+        }
+
+        [Test]
+        public void DefaultConstructor_UsesFileReplace()
+        {
+            Assert.AreEqual(LocalStorageCommitStrategy.FileReplace,
+                new LocalStorageProvider(_rootPath).CommitStrategy);
+        }
+
+        [UnityTest]
+        public IEnumerator RenameOnly_RotatesTwoBackups() => UniTask.ToCoroutine(async () =>
+        {
+            var provider = new LocalStorageProvider(_rootPath, LocalStorageCommitStrategy.RenameOnly, TestMove);
+            await WriteAsync(provider, "one");
+            await WriteAsync(provider, "two");
+            await WriteAsync(provider, "three");
+
+            Assert.AreEqual("three", await ReadAsync(provider, "save.dat"));
+            Assert.AreEqual("two", await ReadAsync(provider, "save.dat.bak1"));
+            Assert.AreEqual("one", await ReadAsync(provider, "save.dat.bak2"));
+        });
+
+        [UnityTest]
+        public IEnumerator RenameOnly_RecoversPrimaryFromBak1_WhenPrimaryMissing() => UniTask.ToCoroutine(async () =>
+        {
+            var provider = new LocalStorageProvider(_rootPath, LocalStorageCommitStrategy.RenameOnly, TestMove);
+            await WriteAsync(provider, "one");
+            await WriteAsync(provider, "two");
+
+            var primary = Path.Combine(_rootPath, "save.dat");
+            var primaryBackup = primary + ".bak1";
+            File.Delete(primaryBackup);
+            File.Move(primary, primaryBackup);
+
+            Assert.IsTrue(await provider.ExistsAsync("save.dat"));
+            Assert.AreEqual("two", await ReadAsync(provider, "save.dat"));
+            Assert.IsTrue(File.Exists(primary));
+            Assert.IsFalse(File.Exists(primaryBackup));
+        });
+
+        [UnityTest]
+        public IEnumerator RenameOnly_RecoversPrimaryFromBak2_WhenBak1Missing() => UniTask.ToCoroutine(async () =>
+        {
+            var provider = new LocalStorageProvider(_rootPath, LocalStorageCommitStrategy.RenameOnly, TestMove);
+            await WriteAsync(provider, "one");
+            await WriteAsync(provider, "two");
+            await WriteAsync(provider, "three");
+
+            var primary = Path.Combine(_rootPath, "save.dat");
+            File.Delete(primary);
+            File.Delete(primary + ".bak1");
+
+            Assert.AreEqual("one", await ReadAsync(provider, "save.dat"));
+        });
+
+        [UnityTest]
+        public IEnumerator RenameOnly_DeletesStaleTempBeforeWrite() => UniTask.ToCoroutine(async () =>
+        {
+            var provider = new LocalStorageProvider(_rootPath, LocalStorageCommitStrategy.RenameOnly, TestMove);
+            await WriteAsync(provider, "one");
+            var primary = Path.Combine(_rootPath, "save.dat");
+            File.WriteAllText(primary + ".tmp", "stale", Encoding.UTF8);
+
+            await WriteAsync(provider, "two");
+
+            Assert.IsFalse(File.Exists(primary + ".tmp"));
+            Assert.AreEqual("two", await ReadAsync(provider, "save.dat"));
+        });
+
+        [UnityTest]
+        public IEnumerator RenameOnly_PreservesSecondGeneration_WhenBak1Missing() => UniTask.ToCoroutine(async () =>
+        {
+            var provider = new LocalStorageProvider(_rootPath, LocalStorageCommitStrategy.RenameOnly, TestMove);
+            await WriteAsync(provider, "one");
+            await WriteAsync(provider, "two");
+            await WriteAsync(provider, "three");
+
+            var primary = Path.Combine(_rootPath, "save.dat");
+            File.Delete(primary + ".bak1");
+
+            await WriteAsync(provider, "four");
+
+            Assert.AreEqual("four", await ReadAsync(provider, "save.dat"));
+            Assert.AreEqual("three", await ReadAsync(provider, "save.dat.bak1"));
+            Assert.AreEqual("one", await ReadAsync(provider, "save.dat.bak2"));
+        });
+
+        [UnityTest]
+        public IEnumerator RenameOnly_DoesNotPromoteOrphanTemp() => UniTask.ToCoroutine(async () =>
+        {
+            var provider = new LocalStorageProvider(_rootPath, LocalStorageCommitStrategy.RenameOnly, TestMove);
+            var primary = Path.Combine(_rootPath, "save.dat");
+            File.WriteAllText(primary + ".tmp", "partial", new UTF8Encoding(false));
+
+            Assert.IsFalse(await provider.ExistsAsync("save.dat"));
+            Assert.IsFalse(File.Exists(primary));
+            Assert.IsFalse(File.Exists(primary + ".tmp"));
+
+            var readFailed = false;
+            try
+            {
+                await ReadAsync(provider, "save.dat");
+            }
+            catch (FileNotFoundException)
+            {
+                readFailed = true;
+            }
+
+            Assert.IsTrue(readFailed);
+        });
+
+        [UnityTest]
+        public IEnumerator RenameOnly_PrefersBackupOverPartialTemp() => UniTask.ToCoroutine(async () =>
+        {
+            var provider = new LocalStorageProvider(_rootPath, LocalStorageCommitStrategy.RenameOnly, TestMove);
+            await WriteAsync(provider, "one");
+            await WriteAsync(provider, "two");
+
+            var primary = Path.Combine(_rootPath, "save.dat");
+            File.Delete(primary);
+            File.WriteAllText(primary + ".tmp", "partial", new UTF8Encoding(false));
+
+            Assert.IsTrue(await provider.ExistsAsync("save.dat"));
+            Assert.AreEqual("one", await ReadAsync(provider, "save.dat"));
+            Assert.IsFalse(File.Exists(primary + ".tmp"));
+        });
+
+        [UnityTest]
+        public IEnumerator FileReplace_DoesNotApplyRenameOnlyRecovery() => UniTask.ToCoroutine(async () =>
+        {
+            var provider = new LocalStorageProvider(_rootPath);
+            await WriteAsync(provider, "one");
+            await WriteAsync(provider, "two");
+
+            var primary = Path.Combine(_rootPath, "save.dat");
+            File.Delete(primary);
+            File.WriteAllText(primary + ".tmp", "partial", new UTF8Encoding(false));
+
+            Assert.IsFalse(await provider.ExistsAsync("save.dat"));
+            Assert.IsTrue(File.Exists(primary + ".bak1"));
+            Assert.IsTrue(File.Exists(primary + ".tmp"));
+
+            var readFailed = false;
+            try
+            {
+                await ReadAsync(provider, "save.dat");
+            }
+            catch (FileNotFoundException)
+            {
+                readFailed = true;
+            }
+
+            Assert.IsTrue(readFailed);
+        });
+
+        [UnityTest]
+        public IEnumerator DeleteAsync_RemovesBackupsAndTemp() => UniTask.ToCoroutine(async () =>
+        {
+            var provider = new LocalStorageProvider(_rootPath, LocalStorageCommitStrategy.RenameOnly, TestMove);
+            await WriteAsync(provider, "one");
+            await WriteAsync(provider, "two");
+            var primary = Path.Combine(_rootPath, "save.dat");
+            File.WriteAllText(primary + ".tmp", "stale", Encoding.UTF8);
+
+            await provider.DeleteAsync("save.dat");
+
+            Assert.IsFalse(File.Exists(primary));
+            Assert.IsFalse(File.Exists(primary + ".bak1"));
+            Assert.IsFalse(File.Exists(primary + ".bak2"));
+            Assert.IsFalse(File.Exists(primary + ".tmp"));
+        });
+
+        [UnityTest]
+        public IEnumerator PlatformInitialize_UsesInjectedStorage() => UniTask.ToCoroutine(async () =>
+        {
+            var storage = new MockStorageProvider();
+            ShrinkSettings.ResetForTesting();
+            ShrinkDataSaverPlatform.Initialize(storage, "runtime-root");
+            ShrinkSettings.Set("injected", 7);
+            await ShrinkSettings.SaveAsync();
+
+            Assert.IsTrue(await storage.ExistsAsync("runtime-root/settings.json"));
+            var bytes = await storage.ReadAsync("runtime-root/settings.json");
+            StringAssert.Contains("\"injected\"", Encoding.UTF8.GetString(bytes));
+        });
+
+        // Tests the shared rotation contract; Godot integration tests exercise actual overwrite rename.
+        private static void TestMove(string source, string destination)
+        {
+            if (File.Exists(destination)) File.Delete(destination);
+            File.Move(source, destination);
+        }
+
+        [Test]
+        public void RenameOnly_RequiresOverwriteCapability() => Assert.Throws<ArgumentException>(() =>
+            new LocalStorageProvider(_rootPath, LocalStorageCommitStrategy.RenameOnly));
+
+        private static async UniTask WriteAsync(IStorageProvider provider, string value)
+        {
+            await provider.WriteAsync("save.dat", Encoding.UTF8.GetBytes(value));
+        }
+
+        private static async UniTask<string> ReadAsync(IStorageProvider provider, string path)
+        {
+            var bytes = await provider.ReadAsync(path);
+            return Encoding.UTF8.GetString(bytes);
+        }
+    }
+}

Tests/LocalStorageProviderStrategyTests.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: f087803def7c483eab1449e4f5dce096
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData:
+  assetBundleName:
+  assetBundleVariant:

Tests/ShrinkSettingsTests.cs

@@ -1,5 +1,7 @@
 using System.Collections;
 using System.Collections.Generic;
+using System.IO;
+using System.Threading;
 using Cysharp.Threading.Tasks;
 using NUnit.Framework;
 using UnityEngine;
@@ -199,6 +201,48 @@ namespace ShrinkDataSaver.Tests
             CollectionAssert.AreEqual(backupBytes, repairedPrimary);
         });
 
+        [UnityTest]
+        public IEnumerator LoadAsync_FallsBackToSecondaryBackup_WhenPrimaryAndFirstBackupCorrupted() =>
+            UniTask.ToCoroutine(async () =>
+        {
+            ShrinkSettings.Set("lang", "zh_cn");
+            await ShrinkSettings.SaveAsync();
+
+            var backupBytes = await _storage.ReadAsync("settings.json");
+            await _storage.WriteAsync("settings.json.bak2", backupBytes);
+            await _storage.WriteAsync("settings.json.bak1", System.Text.Encoding.UTF8.GetBytes("{ broken"));
+            await _storage.WriteAsync("settings.json", System.Text.Encoding.UTF8.GetBytes("{ broken"));
+
+            ShrinkSettings.ResetForTesting();
+            ShrinkSettings.Initialize(_storage, "settings.json");
+
+            await ShrinkSettings.LoadAsync();
+
+            Assert.AreEqual("zh_cn", ShrinkSettings.Get<string>("lang"));
+            var repairedPrimary = await _storage.ReadAsync("settings.json");
+            CollectionAssert.AreEqual(backupBytes, repairedPrimary);
+        });
+
+        [UnityTest]
+        public IEnumerator SaveAsync_PropagatesStorageFailure() => UniTask.ToCoroutine(async () =>
+        {
+            ShrinkSettings.ResetForTesting();
+            ShrinkSettings.Initialize(new FailingStorageProvider(), "settings.json");
+            ShrinkSettings.Set("lang", "zh_cn");
+
+            var failed = false;
+            try
+            {
+                await ShrinkSettings.SaveAsync();
+            }
+            catch (IOException)
+            {
+                failed = true;
+            }
+
+            Assert.IsTrue(failed);
+        });
+
         // ── Overwrite ──
 
         [Test]
@@ -208,5 +252,23 @@ namespace ShrinkDataSaver.Tests
             ShrinkSettings.Set("key", "second");
             Assert.AreEqual("second", ShrinkSettings.Get<string>("key"));
         }
+
+        private sealed class FailingStorageProvider : IStorageProvider
+        {
+            public UniTask WriteAsync(string path, byte[] data, CancellationToken ct = default) =>
+                throw new IOException("write failed");
+
+            public UniTask<byte[]> ReadAsync(string path, CancellationToken ct = default) =>
+                throw new FileNotFoundException(path);
+
+            public UniTask<bool> ExistsAsync(string path, CancellationToken ct = default) =>
+                UniTask.FromResult(false);
+
+            public UniTask DeleteAsync(string path, CancellationToken ct = default) =>
+                UniTask.CompletedTask;
+
+            public UniTask<string[]> ListAsync(string prefix = "", CancellationToken ct = default) =>
+                UniTask.FromResult(System.Array.Empty<string>());
+        }
     }
 }

package.json

@@ -1,6 +1,6 @@
 {
   "name": "com.cneicy.shrink-datasaver",
-  "version": "2.2.2",
+  "version": "2.5.0",
   "displayName": "ShrinkDataSaver",
   "description": "模块化 Unity 存档与设置管理系统，支持多槽位、链式版本迁移、AES-256 加密、关键模块保护、跨模块查询与事件驱动架构。",
   "unity": "2022.3",
@@ -11,7 +11,8 @@
     "com.unity.nuget.newtonsoft-json": "3.2.1",
     "com.cysharp.unitask": "2.5.0",
     "com.unity.modules.imageconversion": "1.0.0",
-    "com.unity.modules.screencapture": "1.0.0"
+    "com.unity.modules.screencapture": "1.0.0",
+    "com.cneicy.shrink-runtime-abstractions": "0.2.0"
   },
   "keywords": [
     "save",