Merge pull request #217 from GeWuYou/feat/godot-source-generators-project-metadata

AGENTS.md

@@ -19,6 +19,27 @@ All AI agents and contributors must follow these rules when writing, reviewing,
 - After resolving the host Windows Git path, prefer an explicit session-local binding for subsequent commands so the
   shell does not fall back to Linux `/usr/bin/git` later in the same WSL session.
 
+## Subagent Usage Rules
+
+- Use subagents only when the task is complex, the context is likely to grow too large, or the work can be split into
+  independent parallel subtasks.
+- The main agent MUST identify the critical path first. Do not delegate the immediate blocking task if the next local
+  step depends on that result.
+- Use `explorer` subagents for read-only discovery, comparison, tracing, and narrow codebase questions.
+- Use `worker` subagents only for bounded implementation tasks with an explicit file or module ownership boundary.
+- Every delegation MUST specify:
+    - the concrete objective
+    - the expected output format
+    - the files or subsystem the subagent owns
+    - any constraints about tests, diagnostics, or compatibility
+- Subagents are not allowed to revert or overwrite unrelated changes from the user or other agents. They must adapt to
+  concurrent work instead of assuming exclusive ownership of the repository.
+- Prefer lightweight models such as `gpt-5.1-codex-mini` for narrow exploration, indexing, and comparison tasks.
+- Prefer stronger models such as `gpt-5.4` for cross-module design work, non-trivial refactors, and tasks that require
+  higher confidence reasoning.
+- The main agent remains responsible for reviewing and integrating subagent output. Unreviewed subagent conclusions do
+  not count as final results.
+
 ## Commenting Rules (MUST)
 
 All generated or modified code MUST include clear and meaningful comments where required by the rules below.

GFramework.Godot.SourceGenerators.Abstractions/AutoLoadAttribute.cs

@@ -0,0 +1,43 @@
+#nullable enable
+namespace GFramework.Godot.SourceGenerators.Abstractions;
+
+/// <summary>
+///     显式声明某个 Godot 节点类型与 <c>project.godot</c> 中 AutoLoad 名称之间的映射关系。
+/// </summary>
+/// <remarks>
+///     当 AutoLoad 条目无法仅靠类型名唯一推断到 C# 节点类型时，
+///     可以通过该特性为生成器提供稳定的强类型映射入口。
+/// </remarks>
+[AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = false)]
+public sealed class AutoLoadAttribute : Attribute
+{
+    /// <summary>
+    ///     初始化 <see cref="AutoLoadAttribute" /> 的新实例。
+    /// </summary>
+    /// <param name="name">在 <c>project.godot</c> 中声明的 AutoLoad 名称。</param>
+    /// <exception cref="ArgumentNullException">
+    ///     <paramref name="name" /> 为 <see langword="null" />。
+    /// </exception>
+    /// <exception cref="ArgumentException">
+    ///     <paramref name="name" /> 为空字符串或仅包含空白字符。
+    /// </exception>
+    public AutoLoadAttribute(string name)
+    {
+        if (name is null)
+        {
+            throw new ArgumentNullException(nameof(name));
+        }
+
+        if (string.IsNullOrWhiteSpace(name))
+        {
+            throw new ArgumentException("AutoLoad name cannot be empty or whitespace.", nameof(name));
+        }
+
+        Name = name;
+    }
+
+    /// <summary>
+    ///     获取在 <c>project.godot</c> 中声明的 AutoLoad 名称。
+    /// </summary>
+    public string Name { get; }
+}

GFramework.Godot.SourceGenerators.Tests/Abstractions/AutoLoadAttributeTests.cs

@@ -0,0 +1,49 @@
+using GFramework.Godot.SourceGenerators.Abstractions;
+
+namespace GFramework.Godot.SourceGenerators.Tests.Abstractions;
+
+/// <summary>
+///     验证 <see cref="AutoLoadAttribute" /> 的参数约束。
+/// </summary>
+[TestFixture]
+public class AutoLoadAttributeTests
+{
+    /// <summary>
+    ///     验证构造函数会保留合法的 AutoLoad 名称。
+    /// </summary>
+    [Test]
+    public void Constructor_Should_Store_Name_When_Name_Is_Valid()
+    {
+        var attribute = new AutoLoadAttribute("GameServices");
+
+        Assert.That(attribute.Name, Is.EqualTo("GameServices"));
+    }
+
+    /// <summary>
+    ///     验证构造函数会拒绝空引用。
+    /// </summary>
+    [Test]
+    public void Constructor_Should_Throw_When_Name_Is_Null()
+    {
+        var exception = Assert.Throws<ArgumentNullException>(() => new AutoLoadAttribute(null!));
+
+        Assert.That(exception!.ParamName, Is.EqualTo("name"));
+    }
+
+    /// <summary>
+    ///     验证构造函数会拒绝空字符串与仅空白字符串。
+    /// </summary>
+    [TestCase("")]
+    [TestCase("   ")]
+    [TestCase("\t")]
+    public void Constructor_Should_Throw_When_Name_Is_Empty_Or_Whitespace(string name)
+    {
+        var exception = Assert.Throws<ArgumentException>(() => new AutoLoadAttribute(name));
+
+        Assert.Multiple(() =>
+        {
+            Assert.That(exception!.ParamName, Is.EqualTo("name"));
+            Assert.That(exception.Message, Does.Contain("empty or whitespace"));
+        });
+    }
+}

GFramework.Godot.SourceGenerators.Tests/Core/AdditionalTextGeneratorTestDriver.cs

@@ -0,0 +1,112 @@
+using System.Collections.Immutable;
+using System.IO;
+using Microsoft.CodeAnalysis.CSharp;
+using Microsoft.CodeAnalysis.Text;
+
+namespace GFramework.Godot.SourceGenerators.Tests.Core;
+
+/// <summary>
+///     提供基于 <see cref="AdditionalText" /> 的源生成器测试驱动。
+/// </summary>
+public static class AdditionalTextGeneratorTestDriver
+{
+    /// <summary>
+    ///     运行指定的增量生成器，并返回生成结果。
+    /// </summary>
+    /// <typeparam name="TGenerator">要运行的生成器类型。</typeparam>
+    /// <param name="source">输入源码。</param>
+    /// <param name="additionalFiles">AdditionalFiles 集合。</param>
+    /// <returns>生成器运行结果。</returns>
+    public static GeneratorDriverRunResult Run<TGenerator>(
+        string source,
+        params (string path, string content)[] additionalFiles)
+        where TGenerator : IIncrementalGenerator, new()
+    {
+        var syntaxTree = CSharpSyntaxTree.ParseText(source);
+        var compilation = CSharpCompilation.Create(
+            typeof(TGenerator).Name + "Tests",
+            new[] { syntaxTree },
+            GetMetadataReferences(),
+            new CSharpCompilationOptions(OutputKind.DynamicallyLinkedLibrary));
+
+        var additionalTexts = additionalFiles
+            .Select(static item => (AdditionalText)new InMemoryAdditionalText(item.path, item.content))
+            .ToImmutableArray();
+
+        GeneratorDriver driver = CSharpGeneratorDriver.Create(
+            generators: new[] { new TGenerator().AsSourceGenerator() },
+            additionalTexts: additionalTexts,
+            parseOptions: (CSharpParseOptions)syntaxTree.Options);
+
+        driver = driver.RunGenerators(compilation);
+        return driver.GetRunResult();
+    }
+
+    /// <summary>
+    ///     将生成结果转换为文件名到文本的映射，便于断言。
+    /// </summary>
+    /// <param name="result">生成器运行结果。</param>
+    /// <returns>按 HintName 索引的生成源码。</returns>
+    public static IReadOnlyDictionary<string, string> ToGeneratedSourceMap(GeneratorDriverRunResult result)
+    {
+        return result.Results
+            .Single()
+            .GeneratedSources
+            .ToDictionary(
+                static item => item.HintName,
+                static item => NormalizeLineEndings(item.SourceText.ToString()),
+                StringComparer.Ordinal);
+    }
+
+    /// <summary>
+    ///     规范化换行，避免测试在不同平台上产生伪差异。
+    /// </summary>
+    /// <param name="content">待规范化文本。</param>
+    /// <returns>统一使用 LF (<c>\n</c>) 的内容。</returns>
+    public static string NormalizeLineEndings(string content)
+    {
+        return content
+            .Replace("\r\n", "\n", StringComparison.Ordinal)
+            .Replace("\r", "\n", StringComparison.Ordinal);
+    }
+
+    private static IEnumerable<MetadataReference> GetMetadataReferences()
+    {
+        var trustedPlatformAssemblies = ((string?)AppContext.GetData("TRUSTED_PLATFORM_ASSEMBLIES"))?
+                                        .Split(Path.PathSeparator, StringSplitOptions.RemoveEmptyEntries)
+                                        ?? Array.Empty<string>();
+
+        return trustedPlatformAssemblies
+            .Select(static path => MetadataReference.CreateFromFile(path));
+    }
+
+    /// <summary>
+    ///     用于测试 AdditionalFiles 的内存实现。
+    /// </summary>
+    private sealed class InMemoryAdditionalText : AdditionalText
+    {
+        private readonly SourceText _text;
+
+        /// <summary>
+        ///     初始化一个内存 AdditionalText。
+        /// </summary>
+        /// <param name="path">虚拟文件路径。</param>
+        /// <param name="content">文件内容。</param>
+        public InMemoryAdditionalText(
+            string path,
+            string content)
+        {
+            Path = path;
+            _text = SourceText.From(content);
+        }
+
+        /// <inheritdoc />
+        public override string Path { get; }
+
+        /// <inheritdoc />
+        public override SourceText GetText(CancellationToken cancellationToken = default)
+        {
+            return _text;
+        }
+    }
+}

GFramework.Godot.SourceGenerators.Tests/Core/AdditionalTextGeneratorTestDriverTests.cs

@@ -0,0 +1,21 @@
+namespace GFramework.Godot.SourceGenerators.Tests.Core;
+
+/// <summary>
+///     验证 <see cref="AdditionalTextGeneratorTestDriver" /> 的文本规范化行为。
+/// </summary>
+[TestFixture]
+public class AdditionalTextGeneratorTestDriverTests
+{
+    /// <summary>
+    ///     验证不同平台换行最终都会被统一为 LF。
+    /// </summary>
+    [Test]
+    public void NormalizeLineEndings_Should_Convert_All_Line_Endings_To_Lf()
+    {
+        const string content = "line1\r\nline2\rline3\nline4";
+
+        var normalized = AdditionalTextGeneratorTestDriver.NormalizeLineEndings(content);
+
+        Assert.That(normalized, Is.EqualTo("line1\nline2\nline3\nline4"));
+    }
+}

GFramework.Godot.SourceGenerators.Tests/GFramework.Godot.SourceGenerators.Tests.csproj

@@ -21,6 +21,7 @@
     </ItemGroup>
 
     <ItemGroup>
+        <ProjectReference Include="..\GFramework.Godot.SourceGenerators.Abstractions\GFramework.Godot.SourceGenerators.Abstractions.csproj"/>
         <ProjectReference Include="..\GFramework.Godot.SourceGenerators\GFramework.Godot.SourceGenerators.csproj"/>
     </ItemGroup>
 

GFramework.Godot.SourceGenerators.Tests/Project/GodotProjectMetadataGeneratorTests.cs

@@ -0,0 +1,584 @@
+using GFramework.Godot.SourceGenerators.Tests.Core;
+
+namespace GFramework.Godot.SourceGenerators.Tests.Project;
+
+/// <summary>
+///     验证基于 <c>project.godot</c> 的项目元数据生成行为。
+/// </summary>
+[TestFixture]
+public class GodotProjectMetadataGeneratorTests
+{
+    /// <summary>
+    ///     验证会根据 AutoLoad 与 Input Action 生成稳定的强类型入口。
+    /// </summary>
+    [Test]
+    public void Run_Should_Generate_AutoLoads_And_InputActions()
+    {
+        var source = CreateSource(
+            """
+            namespace TestApp
+            {
+                using GFramework.Godot.SourceGenerators.Abstractions;
+                using Godot;
+
+                [AutoLoad("GameServices")]
+                public partial class GameServices : Node
+                {
+                }
+            }
+            """,
+            includeAutoLoadAttribute: true);
+
+        const string projectFile = """
+                                   [autoload]
+                                   GameServices="*res://autoload/game_services.tscn"
+                                   AudioBus="*res://autoload/audio_bus.gd"
+
+                                   [input]
+                                   move_up={
+                                   "deadzone": 0.5
+                                   }
+                                   ui_cancel={
+                                   "deadzone": 0.5
+                                   }
+                                   """;
+
+        const string expectedAutoLoads = """
+                                         // <auto-generated />
+                                         #nullable enable
+
+                                         namespace GFramework.Godot.Generated;
+
+                                         /// <summary>
+                                         ///     提供 project.godot 中 AutoLoad 单例的强类型访问入口。
+                                         /// </summary>
+                                         public static partial class AutoLoads
+                                         {
+                                             /// <summary>
+                                             ///     获取 AutoLoad <c>GameServices</c>。
+                                             /// </summary>
+                                             public static global::TestApp.GameServices GameServices => GetRequiredNode<global::TestApp.GameServices>("GameServices");
+
+                                             /// <summary>
+                                             ///     尝试获取 AutoLoad <c>GameServices</c>。
+                                             /// </summary>
+                                             public static bool TryGetGameServices(out global::TestApp.GameServices? value)
+                                             {
+                                                 return TryGetNode("GameServices", out value);
+                                             }
+
+                                             /// <summary>
+                                             ///     获取 AutoLoad <c>AudioBus</c>。
+                                             /// </summary>
+                                             public static global::Godot.Node AudioBus => GetRequiredNode<global::Godot.Node>("AudioBus");
+
+                                             /// <summary>
+                                             ///     尝试获取 AutoLoad <c>AudioBus</c>。
+                                             /// </summary>
+                                             public static bool TryGetAudioBus(out global::Godot.Node? value)
+                                             {
+                                                 return TryGetNode("AudioBus", out value);
+                                             }
+
+                                             /// <summary>
+                                             ///     获取一个必填的 AutoLoad 节点；缺失时抛出异常。
+                                             /// </summary>
+                                             /// <typeparam name="TNode">节点类型。</typeparam>
+                                             /// <param name="autoLoadName">AutoLoad 名称。</param>
+                                             /// <returns>已解析的 AutoLoad 节点。</returns>
+                                             private static TNode GetRequiredNode<TNode>(string autoLoadName)
+                                                 where TNode : global::Godot.Node
+                                             {
+                                                 if (TryGetNode(autoLoadName, out TNode? value))
+                                                 {
+                                                     return value!;
+                                                 }
+
+                                                 throw new global::System.InvalidOperationException($"AutoLoad '{autoLoadName}' is not available on the active SceneTree root.");
+                                             }
+
+                                             /// <summary>
+                                             ///     尝试从当前 SceneTree 根节点解析 AutoLoad。
+                                             /// </summary>
+                                             /// <typeparam name="TNode">节点类型。</typeparam>
+                                             /// <param name="autoLoadName">AutoLoad 名称。</param>
+                                             /// <param name="value">解析到的节点实例。</param>
+                                             /// <returns>若当前进程存在 SceneTree 且根节点中能解析到该 AutoLoad，则返回 <c>true</c>。</returns>
+                                             private static bool TryGetNode<TNode>(string autoLoadName, out TNode? value)
+                                                 where TNode : global::Godot.Node
+                                             {
+                                                 value = default;
+
+                                                 if (global::Godot.Engine.GetMainLoop() is not global::Godot.SceneTree sceneTree)
+                                                 {
+                                                     return false;
+                                                 }
+
+                                                 var root = sceneTree.Root;
+                                                 if (root is null)
+                                                 {
+                                                     return false;
+                                                 }
+
+                                                 value = root.GetNodeOrNull<TNode>($"/root/{autoLoadName}");
+                                                 return value is not null;
+                                             }
+                                         }
+
+                                         """;
+
+        const string expectedInputActions = """
+                                            // <auto-generated />
+                                            #nullable enable
+
+                                            namespace GFramework.Godot.Generated;
+
+                                            /// <summary>
+                                            ///     提供 project.godot 中 Input Action 名称的强类型常量。
+                                            /// </summary>
+                                            public static partial class InputActions
+                                            {
+                                                /// <summary>
+                                                ///     Input Action <c>move_up</c> 的稳定名称。
+                                                /// </summary>
+                                                public const string MoveUp = "move_up";
+
+                                                /// <summary>
+                                                ///     Input Action <c>ui_cancel</c> 的稳定名称。
+                                                /// </summary>
+                                                public const string UiCancel = "ui_cancel";
+
+                                            }
+
+                                            """;
+
+        var result = AdditionalTextGeneratorTestDriver.Run<GodotProjectMetadataGenerator>(
+            source,
+            ("project.godot", projectFile));
+
+        var generatedSources = AdditionalTextGeneratorTestDriver.ToGeneratedSourceMap(result);
+
+        Assert.That(result.Results.Single().Diagnostics, Is.Empty);
+        Assert.That(
+            generatedSources["GFramework_Godot_Generated_AutoLoads.g.cs"],
+            Is.EqualTo(AdditionalTextGeneratorTestDriver.NormalizeLineEndings(expectedAutoLoads)));
+        Assert.That(
+            generatedSources["GFramework_Godot_Generated_InputActions.g.cs"],
+            Is.EqualTo(AdditionalTextGeneratorTestDriver.NormalizeLineEndings(expectedInputActions)));
+    }
+
+    /// <summary>
+    ///     验证 <c>[AutoLoad]</c> 标记在非节点类型上时会产生诊断。
+    /// </summary>
+    [Test]
+    public void Run_Should_Report_Diagnostic_When_AutoLoad_Type_Does_Not_Derive_From_Node()
+    {
+        const string source = """
+                              using System;
+
+                              namespace GFramework.Godot.SourceGenerators.Abstractions
+                              {
+                                  [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = false)]
+                                  public sealed class AutoLoadAttribute : Attribute
+                                  {
+                                      public AutoLoadAttribute(string name)
+                                      {
+                                          Name = name;
+                                      }
+
+                                      public string Name { get; }
+                                  }
+                              }
+
+                              namespace Godot
+                              {
+                                  public class Node
+                                  {
+                                  }
+                              }
+
+                              namespace TestApp
+                              {
+                                  using GFramework.Godot.SourceGenerators.Abstractions;
+
+                                  [AutoLoad("ConfigHub")]
+                                  public partial class ConfigHub
+                                  {
+                                  }
+                              }
+                              """;
+
+        const string projectFile = """
+                                   [autoload]
+                                   ConfigHub="*res://autoload/config_hub.tscn"
+                                   """;
+
+        var result = AdditionalTextGeneratorTestDriver.Run<GodotProjectMetadataGenerator>(
+            source,
+            ("project.godot", projectFile));
+
+        var diagnostic = result.Results.Single().Diagnostics.Single();
+
+        Assert.Multiple(() =>
+        {
+            Assert.That(diagnostic.Id, Is.EqualTo("GF_Godot_Project_001"));
+            Assert.That(diagnostic.Severity, Is.EqualTo(DiagnosticSeverity.Error));
+            Assert.That(diagnostic.GetMessage(), Does.Contain("ConfigHub"));
+        });
+    }
+
+    /// <summary>
+    ///     验证 Input Action 标识符冲突时会追加稳定后缀并给出警告。
+    /// </summary>
+    [Test]
+    public void Run_Should_Report_Diagnostic_And_Append_Suffix_When_Input_Action_Identifiers_Collide()
+    {
+        const string source = """
+                              namespace Godot
+                              {
+                                  public class MainLoop
+                                  {
+                                  }
+
+                                  public class Node
+                                  {
+                                      public T? GetNodeOrNull<T>(string path) where T : Node => default;
+                                  }
+
+                                  public sealed class SceneTree : MainLoop
+                                  {
+                                      public Node? Root { get; set; }
+                                  }
+
+                                  public static class Engine
+                                  {
+                                      public static MainLoop? GetMainLoop() => default;
+                                  }
+                              }
+                              """;
+
+        const string projectFile = """
+                                   [input]
+                                   move_up={
+                                   }
+                                   move-up={
+                                   }
+                                   """;
+
+        var result = AdditionalTextGeneratorTestDriver.Run<GodotProjectMetadataGenerator>(
+            source,
+            ("project.godot", projectFile));
+
+        var diagnostics = result.Results.Single().Diagnostics;
+        var generatedSources = AdditionalTextGeneratorTestDriver.ToGeneratedSourceMap(result);
+
+        Assert.That(diagnostics.Select(static item => item.Id), Is.EqualTo(new[] { "GF_Godot_Project_004" }));
+        Assert.That(
+            generatedSources["GFramework_Godot_Generated_InputActions.g.cs"],
+            Does.Contain("public const string MoveUp = \"move_up\";"));
+        Assert.That(
+            generatedSources["GFramework_Godot_Generated_InputActions.g.cs"],
+            Does.Contain("public const string MoveUp_2 = \"move-up\";"));
+    }
+
+    /// <summary>
+    ///     验证多个显式映射指向同一个 AutoLoad 时会报告重复映射，并退化为 <c>Godot.Node</c>。
+    /// </summary>
+    [Test]
+    public void Run_Should_Report_Diagnostic_When_Explicit_AutoLoad_Mappings_Are_Duplicated()
+    {
+        var result = RunGenerator(
+            CreateSource(
+                """
+                namespace TestApp
+                {
+                    using GFramework.Godot.SourceGenerators.Abstractions;
+                    using Godot;
+
+                    [AutoLoad("AudioBus")]
+                    public partial class PrimaryAudioBus : Node
+                    {
+                    }
+
+                    [AutoLoad("AudioBus")]
+                    public partial class SecondaryAudioBus : Node
+                    {
+                    }
+                }
+                """,
+                includeAutoLoadAttribute: true),
+            """
+            [autoload]
+            AudioBus="*res://autoload/audio_bus.tscn"
+            """);
+
+        var diagnostics = result.Results.Single().Diagnostics;
+        var generatedSources = AdditionalTextGeneratorTestDriver.ToGeneratedSourceMap(result);
+
+        Assert.Multiple(() =>
+        {
+            Assert.That(diagnostics.Select(static item => item.Id), Is.EqualTo(new[] { "GF_Godot_Project_002" }));
+            Assert.That(diagnostics.Single().GetMessage(), Does.Contain("PrimaryAudioBus"));
+            Assert.That(diagnostics.Single().GetMessage(), Does.Contain("SecondaryAudioBus"));
+            Assert.That(
+                generatedSources["GFramework_Godot_Generated_AutoLoads.g.cs"],
+                Does.Contain("public static global::Godot.Node AudioBus => GetRequiredNode<global::Godot.Node>(\"AudioBus\");"));
+        });
+    }
+
+    /// <summary>
+    ///     验证不同命名空间下的同名节点类型会触发隐式映射冲突诊断，并退化为 <c>Godot.Node</c>。
+    /// </summary>
+    [Test]
+    public void Run_Should_Report_Diagnostic_When_Implicit_AutoLoad_Mappings_Are_Ambiguous()
+    {
+        var result = RunGenerator(
+            CreateSource(
+                """
+                namespace TestApp.Audio
+                {
+                    using Godot;
+
+                    public partial class AudioBus : Node
+                    {
+                    }
+                }
+
+                namespace TestApp.Debug
+                {
+                    using Godot;
+
+                    public partial class AudioBus : Node
+                    {
+                    }
+                }
+                """),
+            """
+            [autoload]
+            AudioBus="*res://autoload/audio_bus.tscn"
+            """);
+
+        var diagnostics = result.Results.Single().Diagnostics;
+        var generatedSources = AdditionalTextGeneratorTestDriver.ToGeneratedSourceMap(result);
+
+        Assert.Multiple(() =>
+        {
+            Assert.That(diagnostics.Select(static item => item.Id), Is.EqualTo(new[] { "GF_Godot_Project_002" }));
+            Assert.That(diagnostics.Single().GetMessage(), Does.Contain("Audio.AudioBus"));
+            Assert.That(diagnostics.Single().GetMessage(), Does.Contain("Debug.AudioBus"));
+            Assert.That(
+                generatedSources["GFramework_Godot_Generated_AutoLoads.g.cs"],
+                Does.Contain("public static global::Godot.Node AudioBus => GetRequiredNode<global::Godot.Node>(\"AudioBus\");"));
+        });
+    }
+
+    /// <summary>
+    ///     验证 AutoLoad 标识符冲突时会追加稳定后缀并报告诊断。
+    /// </summary>
+    [Test]
+    public void Run_Should_Report_Diagnostic_And_Append_Suffix_When_AutoLoad_Identifiers_Collide()
+    {
+        var result = RunGenerator(
+            CreateSource("namespace TestApp { }"),
+            """
+            [autoload]
+            audio_bus="*res://autoload/audio_bus.tscn"
+            audio-bus="*res://autoload/audio_bus_debug.tscn"
+            """);
+
+        var diagnostics = result.Results.Single().Diagnostics;
+        var generatedSources = AdditionalTextGeneratorTestDriver.ToGeneratedSourceMap(result);
+
+        Assert.Multiple(() =>
+        {
+            Assert.That(diagnostics.Select(static item => item.Id), Is.EqualTo(new[] { "GF_Godot_Project_003" }));
+            Assert.That(
+                generatedSources["GFramework_Godot_Generated_AutoLoads.g.cs"],
+                Does.Contain("public static global::Godot.Node AudioBus => GetRequiredNode<global::Godot.Node>(\"audio_bus\");"));
+            Assert.That(
+                generatedSources["GFramework_Godot_Generated_AutoLoads.g.cs"],
+                Does.Contain("public static global::Godot.Node AudioBus_2 => GetRequiredNode<global::Godot.Node>(\"audio-bus\");"));
+        });
+    }
+
+    /// <summary>
+    ///     验证重复 AutoLoad 条目会报告诊断，并只保留第一条声明参与生成。
+    /// </summary>
+    [Test]
+    public void Run_Should_Report_Diagnostic_When_Project_File_Contains_Duplicate_AutoLoads()
+    {
+        var result = RunGenerator(
+            CreateSource("namespace TestApp { }"),
+            """
+            [autoload]
+            GameServices="*res://autoload/game_services.tscn"
+            GameServices="*res://autoload/game_services_debug.tscn"
+            """);
+
+        var diagnostics = result.Results.Single().Diagnostics;
+        var generatedSources = AdditionalTextGeneratorTestDriver.ToGeneratedSourceMap(result);
+
+        Assert.Multiple(() =>
+        {
+            Assert.That(diagnostics.Select(static item => item.Id), Is.EqualTo(new[] { "GF_Godot_Project_005" }));
+            Assert.That(diagnostics.Single().GetMessage(), Does.Contain("GameServices"));
+            Assert.That(
+                generatedSources["GFramework_Godot_Generated_AutoLoads.g.cs"],
+                Does.Contain("public static global::Godot.Node GameServices => GetRequiredNode<global::Godot.Node>(\"GameServices\");"));
+            Assert.That(
+                generatedSources["GFramework_Godot_Generated_AutoLoads.g.cs"],
+                Does.Not.Contain("GameServices_2"));
+        });
+    }
+
+    /// <summary>
+    ///     验证重复 Input Action 条目会报告诊断，并只保留第一条声明参与生成。
+    /// </summary>
+    [Test]
+    public void Run_Should_Report_Diagnostic_When_Project_File_Contains_Duplicate_Input_Actions()
+    {
+        var result = RunGenerator(
+            CreateSource("namespace TestApp { }"),
+            """
+            [input]
+            move_up={
+            }
+            move_up={
+            }
+            """);
+
+        var diagnostics = result.Results.Single().Diagnostics;
+        var generatedSources = AdditionalTextGeneratorTestDriver.ToGeneratedSourceMap(result);
+
+        Assert.Multiple(() =>
+        {
+            Assert.That(diagnostics.Select(static item => item.Id), Is.EqualTo(new[] { "GF_Godot_Project_006" }));
+            Assert.That(diagnostics.Single().GetMessage(), Does.Contain("move_up"));
+            Assert.That(
+                generatedSources["GFramework_Godot_Generated_InputActions.g.cs"],
+                Does.Contain("public const string MoveUp = \"move_up\";"));
+            Assert.That(
+                generatedSources["GFramework_Godot_Generated_InputActions.g.cs"],
+                Does.Not.Contain("MoveUp_2"));
+        });
+    }
+
+    /// <summary>
+    ///     验证缺少 <c>project.godot</c> AdditionalText 时不会生成任何源码或诊断。
+    /// </summary>
+    [Test]
+    public void Run_Should_Not_Generate_Sources_When_Project_File_Is_Missing()
+    {
+        var result = AdditionalTextGeneratorTestDriver.Run<GodotProjectMetadataGenerator>(
+            CreateSource("namespace TestApp { }"));
+
+        var generatorResult = result.Results.Single();
+
+        Assert.Multiple(() =>
+        {
+            Assert.That(generatorResult.Diagnostics, Is.Empty);
+            Assert.That(generatorResult.GeneratedSources, Is.Empty);
+        });
+    }
+
+    /// <summary>
+    ///     验证空的 <c>project.godot</c> 内容不会生成任何源码或诊断。
+    /// </summary>
+    [Test]
+    public void Run_Should_Not_Generate_Sources_When_Project_File_Is_Empty()
+    {
+        var result = RunGenerator(
+            CreateSource("namespace TestApp { }"),
+            string.Empty);
+
+        var generatorResult = result.Results.Single();
+
+        Assert.Multiple(() =>
+        {
+            Assert.That(generatorResult.Diagnostics, Is.Empty);
+            Assert.That(generatorResult.GeneratedSources, Is.Empty);
+        });
+    }
+
+    /// <summary>
+    ///     验证只有空节的 <c>project.godot</c> 不会生成任何源码或诊断。
+    /// </summary>
+    [Test]
+    public void Run_Should_Not_Generate_Sources_When_Project_File_Has_Empty_Sections()
+    {
+        var result = RunGenerator(
+            CreateSource("namespace TestApp { }"),
+            """
+            [autoload]
+
+            [input]
+            """);
+
+        var generatorResult = result.Results.Single();
+
+        Assert.Multiple(() =>
+        {
+            Assert.That(generatorResult.Diagnostics, Is.Empty);
+            Assert.That(generatorResult.GeneratedSources, Is.Empty);
+        });
+    }
+
+    private static GeneratorDriverRunResult RunGenerator(
+        string source,
+        string projectFile)
+    {
+        return AdditionalTextGeneratorTestDriver.Run<GodotProjectMetadataGenerator>(
+            source,
+            ("project.godot", projectFile));
+    }
+
+    private static string CreateSource(
+        string applicationSource,
+        bool includeAutoLoadAttribute = false)
+    {
+        var autoLoadAttributeSource = includeAutoLoadAttribute
+            ? """
+              using System;
+
+              namespace GFramework.Godot.SourceGenerators.Abstractions
+              {
+                  [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = false)]
+                  public sealed class AutoLoadAttribute : Attribute
+                  {
+                      public AutoLoadAttribute(string name)
+                      {
+                          Name = name;
+                      }
+
+                      public string Name { get; }
+                  }
+              }
+              """
+            : string.Empty;
+
+        return autoLoadAttributeSource + """
+                                         namespace Godot
+                                         {
+                                             public class MainLoop
+                                             {
+                                             }
+
+                                             public class Node
+                                             {
+                                                 public T? GetNodeOrNull<T>(string path) where T : Node => default;
+                                             }
+
+                                             public sealed class SceneTree : MainLoop
+                                             {
+                                                 public Node? Root { get; set; }
+                                             }
+
+                                             public static class Engine
+                                             {
+                                                 public static MainLoop? GetMainLoop() => default;
+                                             }
+                                         }
+
+                                         """ + applicationSource;
+    }
+}

GFramework.Godot.SourceGenerators/AnalyzerReleases.Unshipped.md

@@ -33,3 +33,9 @@
  GF_AutoExport_006           | GFramework.Godot.SourceGenerators.Registration | Error    | AutoRegisterExportedCollectionsDiagnostics 
  GF_AutoExport_007           | GFramework.Godot.SourceGenerators.Registration | Error    | AutoRegisterExportedCollectionsDiagnostics 
  GF_AutoExport_008           | GFramework.Godot.SourceGenerators.Registration | Error    | AutoRegisterExportedCollectionsDiagnostics 
+ GF_Godot_Project_001        | GFramework.Godot                               | Error    | GodotProjectDiagnostics                    
+ GF_Godot_Project_002        | GFramework.Godot                               | Warning  | GodotProjectDiagnostics                    
+ GF_Godot_Project_003        | GFramework.Godot                               | Warning  | GodotProjectDiagnostics                    
+ GF_Godot_Project_004        | GFramework.Godot                               | Warning  | GodotProjectDiagnostics                    
+ GF_Godot_Project_005        | GFramework.Godot                               | Warning  | GodotProjectDiagnostics                    
+ GF_Godot_Project_006        | GFramework.Godot                               | Warning  | GodotProjectDiagnostics                    

GFramework.Godot.SourceGenerators/Diagnostics/GodotProjectDiagnostics.cs

@@ -0,0 +1,75 @@
+using GFramework.SourceGenerators.Common.Constants;
+
+namespace GFramework.Godot.SourceGenerators.Diagnostics;
+
+/// <summary>
+///     基于 <c>project.godot</c> 的项目元数据生成相关诊断。
+/// </summary>
+public static class GodotProjectDiagnostics
+{
+    /// <summary>
+    ///     标记了 <c>[AutoLoad]</c> 的类型必须继承自 <c>Godot.Node</c>。
+    /// </summary>
+    public static readonly DiagnosticDescriptor AutoLoadTypeMustDeriveFromNode = new(
+        "GF_Godot_Project_001",
+        "AutoLoad types must derive from Godot.Node",
+        "Type '{0}' uses [AutoLoad] but does not derive from Godot.Node",
+        PathContests.GodotNamespace,
+        DiagnosticSeverity.Error,
+        true);
+
+    /// <summary>
+    ///     多个类型映射到同一 AutoLoad 名称时会退化为非强类型访问。
+    /// </summary>
+    public static readonly DiagnosticDescriptor DuplicateAutoLoadMapping = new(
+        "GF_Godot_Project_002",
+        "Duplicate AutoLoad mappings were found",
+        "AutoLoad '{0}' is mapped by multiple types ({1}); the generated accessor falls back to Godot.Node until the mapping is unique",
+        PathContests.GodotNamespace,
+        DiagnosticSeverity.Warning,
+        true);
+
+    /// <summary>
+    ///     多个 AutoLoad 名称映射到同一个标识符时会追加稳定后缀。
+    /// </summary>
+    public static readonly DiagnosticDescriptor AutoLoadIdentifierCollision = new(
+        "GF_Godot_Project_003",
+        "Generated AutoLoad identifier collision",
+        "AutoLoad '{0}' collides with another generated identifier '{1}'; a stable numeric suffix was appended",
+        PathContests.GodotNamespace,
+        DiagnosticSeverity.Warning,
+        true);
+
+    /// <summary>
+    ///     多个 Input Action 名称映射到同一个标识符时会追加稳定后缀。
+    /// </summary>
+    public static readonly DiagnosticDescriptor InputActionIdentifierCollision = new(
+        "GF_Godot_Project_004",
+        "Generated Input Action identifier collision",
+        "Input action '{0}' collides with another generated identifier '{1}'; a stable numeric suffix was appended",
+        PathContests.GodotNamespace,
+        DiagnosticSeverity.Warning,
+        true);
+
+    /// <summary>
+    ///     同一个 <c>project.godot</c> 中存在重复 AutoLoad 条目。
+    /// </summary>
+    public static readonly DiagnosticDescriptor DuplicateAutoLoadEntry = new(
+        "GF_Godot_Project_005",
+        "Duplicate AutoLoad entry in project.godot",
+        "AutoLoad '{0}' is declared multiple times in project.godot; only the first declaration is used",
+        PathContests.GodotNamespace,
+        DiagnosticSeverity.Warning,
+        true);
+
+    /// <summary>
+    ///     同一个 <c>project.godot</c> 中存在重复 Input Action 条目。
+    /// </summary>
+    public static readonly DiagnosticDescriptor DuplicateInputActionEntry = new(
+        "GF_Godot_Project_006",
+        "Duplicate Input Action entry in project.godot",
+        "Input action '{0}' is declared multiple times in project.godot; only the first declaration is used",
+        PathContests.GodotNamespace,
+        DiagnosticSeverity.Warning,
+        true);
+}

GFramework.Godot.SourceGenerators/GeWuYou.GFramework.Godot.SourceGenerators.targets

@@ -3,14 +3,38 @@
     <!-- This file is automatically generated by the NuGet package -->
     <!-- It ensures that the source generators are properly registered during build -->
 
+    <PropertyGroup>
+        <!--
+        默认收集消费者项目根目录下的 project.godot，
+        让 Godot 项目元数据生成能力在常规 Godot C# 工程里开箱即用。
+        -->
+        <GFrameworkGodotProjectFile Condition="'$(GFrameworkGodotProjectFile)' == ''">project.godot</GFrameworkGodotProjectFile>
+        <!--
+        当前生成器按文件名识别 project.godot，因此允许调整相对路径，
+        但不支持把目标文件重命名为其他文件名。
+        -->
+        <_GFrameworkGodotProjectFileName>$([System.IO.Path]::GetFileName('$(GFrameworkGodotProjectFile)'))</_GFrameworkGodotProjectFileName>
+        <_GFrameworkGodotProjectFileNameLower>$([System.String]::Copy('$(_GFrameworkGodotProjectFileName)').ToLowerInvariant())</_GFrameworkGodotProjectFileNameLower>
+    </PropertyGroup>
+
     <ItemGroup>
         <Analyzer Include="$(MSBuildThisFileDirectory)../analyzers/dotnet/cs/GFramework.Godot.SourceGenerators.dll"/>
         <Analyzer Include="$(MSBuildThisFileDirectory)../analyzers/dotnet/cs/GFramework.Godot.SourceGenerators.Abstractions.dll"/>
         <Analyzer Include="$(MSBuildThisFileDirectory)../analyzers/dotnet/cs/GFramework.SourceGenerators.Common.dll"/>
     </ItemGroup>
 
+    <ItemGroup Condition="Exists('$(MSBuildProjectDirectory)/$(GFrameworkGodotProjectFile)')">
+        <AdditionalFiles Include="$(MSBuildProjectDirectory)/$(GFrameworkGodotProjectFile)"/>
+    </ItemGroup>
+
+    <Target Name="ValidateGFrameworkGodotProjectFileName"
+            BeforeTargets="CoreCompile"
+            Condition="Exists('$(MSBuildProjectDirectory)/$(GFrameworkGodotProjectFile)') and '$(_GFrameworkGodotProjectFileNameLower)' != 'project.godot'">
+        <Warning Text="GFrameworkGodotProjectFile can change the relative path, but the file name must remain 'project.godot'; otherwise GodotProjectMetadataGenerator will ignore the file."/>
+    </Target>
+
     <!-- Ensure the analyzers are loaded -->
     <Target Name="EnsureGFrameworkGodotAnalyzers" BeforeTargets="CoreCompile">
         <Message Text="Loading GFramework.Godot source generators" Importance="high"/>
     </Target>
-</Project>
+</Project>

GFramework.Godot.SourceGenerators/GodotProjectMetadataGenerator.cs

@@ -0,0 +1,782 @@
+using System.IO;
+using GFramework.Godot.SourceGenerators.Diagnostics;
+using GFramework.SourceGenerators.Common.Constants;
+using GFramework.SourceGenerators.Common.Extensions;
+using Microsoft.CodeAnalysis.Text;
+
+namespace GFramework.Godot.SourceGenerators;
+
+/// <summary>
+///     读取 <c>project.godot</c> 项目元数据，并生成 AutoLoad 与 Input Action 的强类型访问入口。
+/// </summary>
+/// <remarks>
+///     该生成器把 Godot 项目层面的事实模型暴露为稳定的编译期 API：
+///     <list type="bullet">
+///         <item>
+///             <description>从 <c>[autoload]</c> 段生成统一访问入口，并在可唯一解析到 C# 节点类型时生成强类型属性。</description>
+///         </item>
+///         <item>
+///             <description>从 <c>[input]</c> 段生成输入动作常量，避免手写魔法字符串。</description>
+///         </item>
+///     </list>
+///     对于类型映射冲突或标识符冲突，该生成器会优先给出诊断并退化为可工作的稳定输出，而不是静默生成不确定代码。
+/// </remarks>
+[Generator]
+public sealed class GodotProjectMetadataGenerator : IIncrementalGenerator
+{
+    private const string ProjectFileName = "project.godot";
+    private const string GeneratedNamespace = $"{PathContests.GodotNamespace}.Generated";
+
+    private const string AutoLoadAttributeMetadataName =
+        $"{PathContests.GodotSourceGeneratorsAbstractionsPath}.AutoLoadAttribute";
+
+    /// <inheritdoc />
+    public void Initialize(IncrementalGeneratorInitializationContext context)
+    {
+        var projectFiles = context.AdditionalTextsProvider
+            .Where(static file =>
+                string.Equals(Path.GetFileName(file.Path), ProjectFileName, StringComparison.OrdinalIgnoreCase))
+            .Select(static (file, cancellationToken) => ParseProjectFile(file, cancellationToken))
+            .Collect();
+
+        var typeCandidates = context.SyntaxProvider.CreateSyntaxProvider(
+                static (node, _) => node is ClassDeclarationSyntax,
+                static (syntaxContext, _) => TransformTypeCandidate(syntaxContext))
+            .Where(static candidate => candidate is not null)
+            .Collect();
+
+        var generationInput = context.CompilationProvider.Combine(projectFiles).Combine(typeCandidates);
+        context.RegisterSourceOutput(generationInput, static (productionContext, input) =>
+            Execute(productionContext, input.Left.Left, input.Left.Right, input.Right));
+    }
+
+    private static GodotTypeCandidate? TransformTypeCandidate(GeneratorSyntaxContext context)
+    {
+        if (context.Node is not ClassDeclarationSyntax classDeclaration)
+            return null;
+
+        if (context.SemanticModel.GetDeclaredSymbol(classDeclaration) is not INamedTypeSymbol typeSymbol)
+            return null;
+
+        return new GodotTypeCandidate(classDeclaration, typeSymbol);
+    }
+
+    private static void Execute(
+        SourceProductionContext context,
+        Compilation compilation,
+        ImmutableArray<ProjectMetadataParseResult> projectFileResults,
+        ImmutableArray<GodotTypeCandidate?> typeCandidates)
+    {
+        if (projectFileResults.IsDefaultOrEmpty)
+            return;
+
+        var projectResult = projectFileResults
+            .OrderBy(static result => result.FilePath, StringComparer.OrdinalIgnoreCase)
+            .FirstOrDefault();
+
+        foreach (var diagnostic in projectResult.Diagnostics)
+        {
+            context.ReportDiagnostic(diagnostic);
+        }
+
+        var godotNodeSymbol = compilation.GetTypeByMetadataName("Godot.Node");
+        if (godotNodeSymbol is null)
+            return;
+
+        var autoLoadAttributeSymbol = compilation.GetTypeByMetadataName(AutoLoadAttributeMetadataName);
+        var concreteCandidates = typeCandidates
+            .Where(static candidate => candidate is not null)
+            .Select(static candidate => candidate!)
+            .ToArray();
+
+        var typedMappings = BuildTypedMappings(
+            context,
+            projectResult,
+            concreteCandidates,
+            autoLoadAttributeSymbol,
+            godotNodeSymbol);
+
+        if (projectResult.AutoLoads.Length > 0)
+        {
+            var autoLoadMembers = CreateAutoLoadMembers(context, projectResult, typedMappings);
+            context.AddSource(
+                "GFramework_Godot_Generated_AutoLoads.g.cs",
+                SourceText.From(GenerateAutoLoadSource(autoLoadMembers), Encoding.UTF8));
+        }
+
+        if (projectResult.InputActions.Length > 0)
+        {
+            var inputActionMembers = CreateInputActionMembers(context, projectResult);
+            context.AddSource(
+                "GFramework_Godot_Generated_InputActions.g.cs",
+                SourceText.From(GenerateInputActionsSource(inputActionMembers), Encoding.UTF8));
+        }
+    }
+
+    private static Dictionary<string, INamedTypeSymbol> BuildTypedMappings(
+        SourceProductionContext context,
+        ProjectMetadataParseResult projectResult,
+        IReadOnlyList<GodotTypeCandidate> typeCandidates,
+        INamedTypeSymbol? autoLoadAttributeSymbol,
+        INamedTypeSymbol godotNodeSymbol)
+    {
+        var projectAutoLoadNames = new HashSet<string>(
+            projectResult.AutoLoads.Select(static entry => entry.Name),
+            StringComparer.Ordinal);
+
+        var explicitMappings = new Dictionary<string, List<INamedTypeSymbol>>(StringComparer.Ordinal);
+        var implicitCandidates = new Dictionary<string, List<INamedTypeSymbol>>(StringComparer.Ordinal);
+
+        foreach (var candidate in typeCandidates)
+        {
+            var typeSymbol = candidate.TypeSymbol;
+            var derivesFromNode = typeSymbol.IsAssignableTo(godotNodeSymbol);
+
+            if (derivesFromNode)
+            {
+                if (!implicitCandidates.TryGetValue(typeSymbol.Name, out var implicitList))
+                {
+                    implicitList = new List<INamedTypeSymbol>();
+                    implicitCandidates.Add(typeSymbol.Name, implicitList);
+                }
+
+                implicitList.Add(typeSymbol);
+            }
+
+            if (autoLoadAttributeSymbol is null)
+                continue;
+
+            var autoLoadAttribute = typeSymbol.GetAttributes()
+                .FirstOrDefault(attribute =>
+                    SymbolEqualityComparer.Default.Equals(attribute.AttributeClass, autoLoadAttributeSymbol));
+
+            if (autoLoadAttribute is null)
+                continue;
+
+            if (!derivesFromNode)
+            {
+                context.ReportDiagnostic(Diagnostic.Create(
+                    GodotProjectDiagnostics.AutoLoadTypeMustDeriveFromNode,
+                    candidate.ClassDeclaration.Identifier.GetLocation(),
+                    typeSymbol.ToDisplayString(SymbolDisplayFormat.MinimallyQualifiedFormat)));
+                continue;
+            }
+
+            if (!TryGetAutoLoadName(autoLoadAttribute, out var autoLoadName))
+                continue;
+
+            if (!projectAutoLoadNames.Contains(autoLoadName))
+                continue;
+
+            if (!explicitMappings.TryGetValue(autoLoadName, out var explicitList))
+            {
+                explicitList = new List<INamedTypeSymbol>();
+                explicitMappings.Add(autoLoadName, explicitList);
+            }
+
+            explicitList.Add(typeSymbol);
+        }
+
+        var resolvedMappings = new Dictionary<string, INamedTypeSymbol>(StringComparer.Ordinal);
+
+        foreach (var projectAutoLoadName in projectAutoLoadNames.OrderBy(static name => name, StringComparer.Ordinal))
+        {
+            // 显式 [AutoLoad] 映射优先于按类型名推断，因为它代表了用户给出的稳定契约。
+            if (explicitMappings.TryGetValue(projectAutoLoadName, out var explicitList))
+            {
+                var distinctExplicitTypes = DistinctTypeSymbols(explicitList);
+
+                if (distinctExplicitTypes.Length == 1)
+                {
+                    resolvedMappings.Add(projectAutoLoadName, distinctExplicitTypes[0]);
+                }
+                else if (distinctExplicitTypes.Length > 1)
+                {
+                    ReportDuplicateAutoLoadMapping(context, projectAutoLoadName, distinctExplicitTypes);
+                }
+
+                continue;
+            }
+
+            if (!implicitCandidates.TryGetValue(projectAutoLoadName, out var implicitList))
+                continue;
+
+            var distinctImplicitTypes = DistinctTypeSymbols(implicitList);
+
+            if (distinctImplicitTypes.Length == 1)
+            {
+                resolvedMappings.Add(projectAutoLoadName, distinctImplicitTypes[0]);
+            }
+            else if (distinctImplicitTypes.Length > 1)
+            {
+                // 隐式推断只在唯一命中时才安全；出现同名候选时改为诊断并退化成 Godot.Node。
+                ReportDuplicateAutoLoadMapping(context, projectAutoLoadName, distinctImplicitTypes);
+            }
+        }
+
+        return resolvedMappings;
+    }
+
+    private static bool TryGetAutoLoadName(AttributeData attribute, out string autoLoadName)
+    {
+        autoLoadName = string.Empty;
+
+        if (attribute.ConstructorArguments.Length != 1 ||
+            attribute.ConstructorArguments[0].Value is not string rawName ||
+            string.IsNullOrWhiteSpace(rawName))
+        {
+            return false;
+        }
+
+        autoLoadName = rawName;
+        return true;
+    }
+
+    private static void ReportDuplicateAutoLoadMapping(
+        SourceProductionContext context,
+        string autoLoadName,
+        IEnumerable<INamedTypeSymbol> duplicateTypes)
+    {
+        context.ReportDiagnostic(Diagnostic.Create(
+            GodotProjectDiagnostics.DuplicateAutoLoadMapping,
+            Location.None,
+            autoLoadName,
+            string.Join(
+                ", ",
+                duplicateTypes.Select(static type =>
+                    type.ToDisplayString(SymbolDisplayFormat.CSharpErrorMessageFormat)))));
+    }
+
+    private static IReadOnlyList<GeneratedAutoLoadMember> CreateAutoLoadMembers(
+        SourceProductionContext context,
+        ProjectMetadataParseResult projectResult,
+        IReadOnlyDictionary<string, INamedTypeSymbol> typedMappings)
+    {
+        var identifierCounts = new Dictionary<string, int>(StringComparer.Ordinal);
+        var members = new List<GeneratedAutoLoadMember>(projectResult.AutoLoads.Length);
+
+        foreach (var entry in projectResult.AutoLoads)
+        {
+            var baseIdentifier = SanitizeIdentifier(entry.Name, "AutoLoad");
+            var identifier = ResolveUniqueIdentifier(
+                context,
+                identifierCounts,
+                entry.Name,
+                baseIdentifier,
+                GodotProjectDiagnostics.AutoLoadIdentifierCollision);
+
+            var typeName = typedMappings.TryGetValue(entry.Name, out var typeSymbol)
+                ? typeSymbol.ToDisplayString(SymbolDisplayFormat.FullyQualifiedFormat)
+                : "global::Godot.Node";
+
+            members.Add(new GeneratedAutoLoadMember(entry.Name, identifier, typeName, entry.ResourcePath));
+        }
+
+        return members;
+    }
+
+    private static IReadOnlyList<GeneratedInputActionMember> CreateInputActionMembers(
+        SourceProductionContext context,
+        ProjectMetadataParseResult projectResult)
+    {
+        var identifierCounts = new Dictionary<string, int>(StringComparer.Ordinal);
+        var members = new List<GeneratedInputActionMember>(projectResult.InputActions.Length);
+
+        foreach (var actionName in projectResult.InputActions)
+        {
+            var baseIdentifier = SanitizeIdentifier(actionName, "Action");
+            var identifier = ResolveUniqueIdentifier(
+                context,
+                identifierCounts,
+                actionName,
+                baseIdentifier,
+                GodotProjectDiagnostics.InputActionIdentifierCollision);
+
+            members.Add(new GeneratedInputActionMember(actionName, identifier));
+        }
+
+        return members;
+    }
+
+    private static string ResolveUniqueIdentifier(
+        SourceProductionContext context,
+        IDictionary<string, int> identifierCounts,
+        string originalName,
+        string baseIdentifier,
+        DiagnosticDescriptor collisionDiagnostic)
+    {
+        if (!identifierCounts.TryGetValue(baseIdentifier, out var count))
+        {
+            identifierCounts.Add(baseIdentifier, 1);
+            return baseIdentifier;
+        }
+
+        count++;
+        identifierCounts[baseIdentifier] = count;
+
+        context.ReportDiagnostic(Diagnostic.Create(
+            collisionDiagnostic,
+            Location.None,
+            originalName,
+            baseIdentifier));
+
+        return $"{baseIdentifier}_{count}";
+    }
+
+    private static INamedTypeSymbol[] DistinctTypeSymbols(IEnumerable<INamedTypeSymbol> types)
+    {
+        var results = new List<INamedTypeSymbol>();
+
+        foreach (var type in types)
+        {
+            if (results.Any(existing => SymbolEqualityComparer.Default.Equals(existing, type)))
+                continue;
+
+            results.Add(type);
+        }
+
+        return results.ToArray();
+    }
+
+    private static string SanitizeIdentifier(
+        string rawName,
+        string fallbackPrefix)
+    {
+        var tokens = new List<string>();
+        var tokenBuilder = new StringBuilder();
+
+        foreach (var character in rawName)
+        {
+            if (char.IsLetterOrDigit(character))
+            {
+                tokenBuilder.Append(character);
+                continue;
+            }
+
+            FlushToken(tokens, tokenBuilder);
+        }
+
+        FlushToken(tokens, tokenBuilder);
+
+        var identifier = tokens.Count == 0
+            ? fallbackPrefix
+            : string.Concat(tokens);
+
+        if (string.IsNullOrWhiteSpace(identifier))
+            identifier = fallbackPrefix;
+
+        if (!SyntaxFacts.IsIdentifierStartCharacter(identifier[0]))
+            identifier = fallbackPrefix + identifier;
+
+        return SyntaxFacts.GetKeywordKind(identifier) != SyntaxKind.None
+            ? identifier + "Value"
+            : identifier;
+    }
+
+    private static void FlushToken(
+        ICollection<string> tokens,
+        StringBuilder tokenBuilder)
+    {
+        if (tokenBuilder.Length == 0)
+            return;
+
+        var token = tokenBuilder.ToString();
+        tokenBuilder.Clear();
+
+        if (token.Length == 1)
+        {
+            tokens.Add(token.ToUpperInvariant());
+            return;
+        }
+
+        tokens.Add(char.ToUpperInvariant(token[0]) + token.Substring(1));
+    }
+
+    private static string GenerateAutoLoadSource(IReadOnlyList<GeneratedAutoLoadMember> members)
+    {
+        var builder = new StringBuilder();
+        builder.AppendLine("// <auto-generated />");
+        builder.AppendLine("#nullable enable");
+        builder.AppendLine();
+        builder.AppendLine($"namespace {GeneratedNamespace};");
+        builder.AppendLine();
+        builder.AppendLine("/// <summary>");
+        builder.AppendLine("///     提供 project.godot 中 AutoLoad 单例的强类型访问入口。");
+        builder.AppendLine("/// </summary>");
+        builder.AppendLine("public static partial class AutoLoads");
+        builder.AppendLine("{");
+
+        foreach (var member in members)
+        {
+            builder.AppendLine("    /// <summary>");
+            builder.AppendLine($"    ///     获取 AutoLoad <c>{member.AutoLoadName}</c>。");
+            builder.AppendLine("    /// </summary>");
+            builder.AppendLine(
+                $"    public static {member.TypeName} {member.Identifier} => GetRequiredNode<{member.TypeName}>({SymbolDisplay.FormatLiteral(member.AutoLoadName, true)});");
+            builder.AppendLine();
+            builder.AppendLine("    /// <summary>");
+            builder.AppendLine($"    ///     尝试获取 AutoLoad <c>{member.AutoLoadName}</c>。");
+            builder.AppendLine("    /// </summary>");
+            builder.AppendLine(
+                $"    public static bool TryGet{member.Identifier}(out {member.TypeName}? value)");
+            builder.AppendLine("    {");
+            builder.AppendLine(
+                $"        return TryGetNode({SymbolDisplay.FormatLiteral(member.AutoLoadName, true)}, out value);");
+            builder.AppendLine("    }");
+            builder.AppendLine();
+        }
+
+        builder.AppendLine("    /// <summary>");
+        builder.AppendLine("    ///     获取一个必填的 AutoLoad 节点；缺失时抛出异常。");
+        builder.AppendLine("    /// </summary>");
+        builder.AppendLine("    /// <typeparam name=\"TNode\">节点类型。</typeparam>");
+        builder.AppendLine("    /// <param name=\"autoLoadName\">AutoLoad 名称。</param>");
+        builder.AppendLine("    /// <returns>已解析的 AutoLoad 节点。</returns>");
+        builder.AppendLine("    private static TNode GetRequiredNode<TNode>(string autoLoadName)");
+        builder.AppendLine("        where TNode : global::Godot.Node");
+        builder.AppendLine("    {");
+        builder.AppendLine("        if (TryGetNode(autoLoadName, out TNode? value))");
+        builder.AppendLine("        {");
+        builder.AppendLine("            return value!;");
+        builder.AppendLine("        }");
+        builder.AppendLine();
+        builder.AppendLine(
+            "        throw new global::System.InvalidOperationException($\"AutoLoad '{autoLoadName}' is not available on the active SceneTree root.\");");
+        builder.AppendLine("    }");
+        builder.AppendLine();
+        builder.AppendLine("    /// <summary>");
+        builder.AppendLine("    ///     尝试从当前 SceneTree 根节点解析 AutoLoad。");
+        builder.AppendLine("    /// </summary>");
+        builder.AppendLine("    /// <typeparam name=\"TNode\">节点类型。</typeparam>");
+        builder.AppendLine("    /// <param name=\"autoLoadName\">AutoLoad 名称。</param>");
+        builder.AppendLine("    /// <param name=\"value\">解析到的节点实例。</param>");
+        builder.AppendLine("    /// <returns>若当前进程存在 SceneTree 且根节点中能解析到该 AutoLoad，则返回 <c>true</c>。</returns>");
+        builder.AppendLine("    private static bool TryGetNode<TNode>(string autoLoadName, out TNode? value)");
+        builder.AppendLine("        where TNode : global::Godot.Node");
+        builder.AppendLine("    {");
+        builder.AppendLine("        value = default;");
+        builder.AppendLine();
+        builder.AppendLine("        if (global::Godot.Engine.GetMainLoop() is not global::Godot.SceneTree sceneTree)");
+        builder.AppendLine("        {");
+        builder.AppendLine("            return false;");
+        builder.AppendLine("        }");
+        builder.AppendLine();
+        builder.AppendLine("        var root = sceneTree.Root;");
+        builder.AppendLine("        if (root is null)");
+        builder.AppendLine("        {");
+        builder.AppendLine("            return false;");
+        builder.AppendLine("        }");
+        builder.AppendLine();
+        builder.AppendLine("        value = root.GetNodeOrNull<TNode>($\"/root/{autoLoadName}\");");
+        builder.AppendLine("        return value is not null;");
+        builder.AppendLine("    }");
+        builder.AppendLine("}");
+
+        return builder.ToString();
+    }
+
+    private static string GenerateInputActionsSource(IReadOnlyList<GeneratedInputActionMember> members)
+    {
+        var builder = new StringBuilder();
+        builder.AppendLine("// <auto-generated />");
+        builder.AppendLine("#nullable enable");
+        builder.AppendLine();
+        builder.AppendLine($"namespace {GeneratedNamespace};");
+        builder.AppendLine();
+        builder.AppendLine("/// <summary>");
+        builder.AppendLine("///     提供 project.godot 中 Input Action 名称的强类型常量。");
+        builder.AppendLine("/// </summary>");
+        builder.AppendLine("public static partial class InputActions");
+        builder.AppendLine("{");
+
+        foreach (var member in members)
+        {
+            builder.AppendLine("    /// <summary>");
+            builder.AppendLine($"    ///     Input Action <c>{member.ActionName}</c> 的稳定名称。");
+            builder.AppendLine("    /// </summary>");
+            builder.AppendLine(
+                $"    public const string {member.Identifier} = {SymbolDisplay.FormatLiteral(member.ActionName, true)};");
+            builder.AppendLine();
+        }
+
+        builder.AppendLine("}");
+        return builder.ToString();
+    }
+
+    private static ProjectMetadataParseResult ParseProjectFile(
+        AdditionalText file,
+        CancellationToken cancellationToken)
+    {
+        var text = file.GetText(cancellationToken);
+        if (text is null)
+        {
+            return new ProjectMetadataParseResult(
+                file.Path,
+                ImmutableArray<ProjectAutoLoadEntry>.Empty,
+                ImmutableArray<string>.Empty,
+                ImmutableArray<Diagnostic>.Empty);
+        }
+
+        var currentSection = string.Empty;
+        var autoLoads = new List<ProjectAutoLoadEntry>();
+        var inputActions = new List<string>();
+        var diagnostics = new List<Diagnostic>();
+        var seenAutoLoads = new HashSet<string>(StringComparer.Ordinal);
+        var seenInputActions = new HashSet<string>(StringComparer.Ordinal);
+
+        foreach (var line in text.Lines)
+        {
+            var content = line.ToString().Trim();
+            if (string.IsNullOrWhiteSpace(content) || content.StartsWith(";", StringComparison.Ordinal))
+                continue;
+
+            if (content.StartsWith("[", StringComparison.Ordinal) && content.EndsWith("]", StringComparison.Ordinal))
+            {
+                currentSection = content.Substring(1, content.Length - 2).Trim();
+                continue;
+            }
+
+            if (!TryParseAssignment(content, out var key, out var value))
+                continue;
+
+            if (string.Equals(currentSection, "autoload", StringComparison.OrdinalIgnoreCase))
+            {
+                if (!seenAutoLoads.Add(key))
+                {
+                    diagnostics.Add(Diagnostic.Create(
+                        GodotProjectDiagnostics.DuplicateAutoLoadEntry,
+                        CreateFileLocation(file.Path),
+                        key));
+                    continue;
+                }
+
+                autoLoads.Add(new ProjectAutoLoadEntry(
+                    key,
+                    NormalizeProjectPath(value)));
+                continue;
+            }
+
+            if (string.Equals(currentSection, "input", StringComparison.OrdinalIgnoreCase))
+            {
+                if (!seenInputActions.Add(key))
+                {
+                    diagnostics.Add(Diagnostic.Create(
+                        GodotProjectDiagnostics.DuplicateInputActionEntry,
+                        CreateFileLocation(file.Path),
+                        key));
+                    continue;
+                }
+
+                inputActions.Add(key);
+            }
+        }
+
+        return new ProjectMetadataParseResult(
+            file.Path,
+            autoLoads.ToImmutableArray(),
+            inputActions.ToImmutableArray(),
+            diagnostics.ToImmutableArray());
+    }
+
+    private static string NormalizeProjectPath(string rawValue)
+    {
+        var trimmed = rawValue.Trim();
+
+        if (trimmed.Length >= 2 &&
+            trimmed[0] == '"' &&
+            trimmed[trimmed.Length - 1] == '"')
+        {
+            trimmed = trimmed.Substring(1, trimmed.Length - 2);
+        }
+
+        return trimmed.TrimStart('*');
+    }
+
+    private static bool TryParseAssignment(
+        string line,
+        out string key,
+        out string value)
+    {
+        key = string.Empty;
+        value = string.Empty;
+
+        var separatorIndex = line.IndexOf('=');
+        if (separatorIndex <= 0)
+            return false;
+
+        key = line.Substring(0, separatorIndex).Trim();
+        if (string.IsNullOrWhiteSpace(key))
+            return false;
+
+        value = line.Substring(separatorIndex + 1).Trim();
+        return true;
+    }
+
+    private static Location CreateFileLocation(string filePath)
+    {
+        return Location.Create(filePath, TextSpan.FromBounds(0, 0),
+            new LinePositionSpan(new LinePosition(0, 0), new LinePosition(0, 0)));
+    }
+
+    private sealed class GodotTypeCandidate
+    {
+        /// <summary>
+        ///     创建一个类型候选。
+        /// </summary>
+        /// <param name="classDeclaration">类型语法节点。</param>
+        /// <param name="typeSymbol">类型符号。</param>
+        public GodotTypeCandidate(
+            ClassDeclarationSyntax classDeclaration,
+            INamedTypeSymbol typeSymbol)
+        {
+            ClassDeclaration = classDeclaration;
+            TypeSymbol = typeSymbol;
+        }
+
+        /// <summary>
+        ///     获取类型声明语法。
+        /// </summary>
+        public ClassDeclarationSyntax ClassDeclaration { get; }
+
+        /// <summary>
+        ///     获取类型符号。
+        /// </summary>
+        public INamedTypeSymbol TypeSymbol { get; }
+    }
+
+    private sealed class ProjectAutoLoadEntry
+    {
+        /// <summary>
+        ///     初始化 AutoLoad 条目。
+        /// </summary>
+        /// <param name="name">AutoLoad 名称。</param>
+        /// <param name="resourcePath">资源路径。</param>
+        public ProjectAutoLoadEntry(
+            string name,
+            string resourcePath)
+        {
+            Name = name;
+            ResourcePath = resourcePath;
+        }
+
+        /// <summary>
+        ///     获取 AutoLoad 名称。
+        /// </summary>
+        public string Name { get; }
+
+        /// <summary>
+        ///     获取资源路径。
+        /// </summary>
+        public string ResourcePath { get; }
+    }
+
+    private sealed class GeneratedAutoLoadMember
+    {
+        /// <summary>
+        ///     初始化一个生成后的 AutoLoad 成员描述。
+        /// </summary>
+        /// <param name="autoLoadName">原始 AutoLoad 名称。</param>
+        /// <param name="identifier">生成后的标识符。</param>
+        /// <param name="typeName">类型名。</param>
+        /// <param name="resourcePath">资源路径。</param>
+        public GeneratedAutoLoadMember(
+            string autoLoadName,
+            string identifier,
+            string typeName,
+            string resourcePath)
+        {
+            AutoLoadName = autoLoadName;
+            Identifier = identifier;
+            TypeName = typeName;
+            ResourcePath = resourcePath;
+        }
+
+        /// <summary>
+        ///     获取原始 AutoLoad 名称。
+        /// </summary>
+        public string AutoLoadName { get; }
+
+        /// <summary>
+        ///     获取生成后的标识符。
+        /// </summary>
+        public string Identifier { get; }
+
+        /// <summary>
+        ///     获取类型名。
+        /// </summary>
+        public string TypeName { get; }
+
+        /// <summary>
+        ///     获取资源路径。
+        /// </summary>
+        public string ResourcePath { get; }
+    }
+
+    private sealed class GeneratedInputActionMember
+    {
+        /// <summary>
+        ///     初始化一个生成后的 Input Action 成员描述。
+        /// </summary>
+        /// <param name="actionName">原始动作名。</param>
+        /// <param name="identifier">生成后的标识符。</param>
+        public GeneratedInputActionMember(
+            string actionName,
+            string identifier)
+        {
+            ActionName = actionName;
+            Identifier = identifier;
+        }
+
+        /// <summary>
+        ///     获取原始动作名。
+        /// </summary>
+        public string ActionName { get; }
+
+        /// <summary>
+        ///     获取生成后的标识符。
+        /// </summary>
+        public string Identifier { get; }
+    }
+
+    private sealed class ProjectMetadataParseResult
+    {
+        /// <summary>
+        ///     初始化一个项目元数据解析结果。
+        /// </summary>
+        /// <param name="filePath">项目文件路径。</param>
+        /// <param name="autoLoads">AutoLoad 条目。</param>
+        /// <param name="inputActions">Input Action 条目。</param>
+        /// <param name="diagnostics">解析过程中的诊断。</param>
+        public ProjectMetadataParseResult(
+            string filePath,
+            ImmutableArray<ProjectAutoLoadEntry> autoLoads,
+            ImmutableArray<string> inputActions,
+            ImmutableArray<Diagnostic> diagnostics)
+        {
+            FilePath = filePath;
+            AutoLoads = autoLoads;
+            InputActions = inputActions;
+            Diagnostics = diagnostics;
+        }
+
+        /// <summary>
+        ///     获取项目文件路径。
+        /// </summary>
+        public string FilePath { get; }
+
+        /// <summary>
+        ///     获取 AutoLoad 条目。
+        /// </summary>
+        public ImmutableArray<ProjectAutoLoadEntry> AutoLoads { get; }
+
+        /// <summary>
+        ///     获取 Input Action 条目。
+        /// </summary>
+        public ImmutableArray<string> InputActions { get; }
+
+        /// <summary>
+        ///     获取解析过程中的诊断。
+        /// </summary>
+        public ImmutableArray<Diagnostic> Diagnostics { get; }
+    }
+}

GFramework.Godot.SourceGenerators/README.md

@@ -6,6 +6,7 @@
 
 - 与 Godot 场景相关的编译期生成能力
 - 基于 Roslyn 的增量生成器实现
+- `project.godot` 项目元数据生成，产出 AutoLoad 与 Input Action 的强类型访问入口
 - `[GetNode]` 字段注入，减少 `_Ready()` 里的 `GetNode<T>()` 样板代码
 - `[BindNodeSignal]` 方法绑定，减少 `_Ready()` / `_ExitTree()` 中重复的事件订阅样板代码
 
@@ -13,6 +14,96 @@
 
 - 仅在 Godot + C# 项目中启用
 - 非 Godot 项目可只使用 GFramework.SourceGenerators
+- 当项目通过 NuGet 包引用本模块时，根目录下的 `project.godot` 会被自动加入 `AdditionalFiles`
+- 当项目通过 `ProjectReference(OutputItemType=Analyzer)` 直接引用生成器时，需要手动把 `project.godot` 加入
+  `AdditionalFiles`
+
+## project.godot 集成
+
+默认情况下，生成器会读取 Godot 项目根目录下的 `project.godot`，并生成：
+
+- `GFramework.Godot.Generated.AutoLoads`
+- `GFramework.Godot.Generated.InputActions`
+
+如果你需要覆盖默认项目文件路径，可以在 MSBuild 中设置：
+
+- 路径可以调整到项目根目录下的其他位置
+- 文件名必须仍然是 `project.godot`，否则生成器会发出警告并忽略该文件
+
+```xml
+<PropertyGroup>
+  <GFrameworkGodotProjectFile>Config/project.godot</GFrameworkGodotProjectFile>
+</PropertyGroup>
+```
+
+如果你在仓库内通过 analyzer 形式直接引用本项目，则需要显式配置：
+
+```xml
+<ItemGroup>
+  <AdditionalFiles Include="project.godot" />
+</ItemGroup>
+```
+
+## AutoLoad 强类型访问
+
+当某个 AutoLoad 无法仅靠类型名唯一推断到 C# 节点类型时，可以使用 `[AutoLoad]` 显式声明映射：
+
+```csharp
+using GFramework.Godot.SourceGenerators.Abstractions;
+using Godot;
+
+[AutoLoad("GameServices")]
+public partial class GameServices : Node
+{
+}
+```
+
+对应 `project.godot`：
+
+```ini
+[autoload]
+GameServices="*res://autoload/game_services.tscn"
+AudioBus="*res://autoload/audio_bus.gd"
+```
+
+生成器会产出统一入口：
+
+```csharp
+using GFramework.Godot.Generated;
+
+var gameServices = AutoLoads.GameServices;
+
+if (AutoLoads.TryGetAudioBus(out var audioBus))
+{
+}
+```
+
+- 显式 `[AutoLoad]` 映射优先于隐式类型名推断
+- 若同名映射冲突，生成器会给出诊断并退化为 `Godot.Node` 访问
+- 若无法映射到 C# 节点类型，仍会生成可用的 `Godot.Node` 访问器
+
+## Input Action 常量生成
+
+`project.godot` 的 `[input]` 段会自动生成稳定常量，避免手写字符串：
+
+```ini
+[input]
+move_up={
+}
+ui_cancel={
+}
+```
+
+```csharp
+using GFramework.Godot.Generated;
+
+if (Input.IsActionJustPressed(InputActions.MoveUp))
+{
+}
+```
+
+- 动作名会转换为可补全的 C# 标识符，例如 `move_up -> MoveUp`
+- 当多个动作名映射到同一标识符时，会追加稳定后缀并给出警告
 
 ## GetNode 用法
 

docs/.vitepress/config.mts

@@ -251,6 +251,7 @@ export default defineConfig({
                 { text: 'ContextAware 生成器', link: '/zh-CN/source-generators/context-aware-generator' },
                 { text: 'Priority 生成器', link: '/zh-CN/source-generators/priority-generator' },
                 { text: 'Context Get 注入', link: '/zh-CN/source-generators/context-get-generator' },
+                { text: 'Godot 项目元数据', link: '/zh-CN/source-generators/godot-project-generator' },
                 { text: 'GetNode 生成器 (Godot)', link: '/zh-CN/source-generators/get-node-generator' },
                 { text: 'BindNodeSignal 生成器 (Godot)', link: '/zh-CN/source-generators/bind-node-signal-generator' }
               ]

docs/zh-CN/api-reference/index.md

@@ -452,16 +452,17 @@ Godot 引擎集成模块。
 
 #### 常用 Attribute
 
-| Attribute                                  | 说明                                | 文档                                                                                                          |
+| Attribute                                  | 说明                                        | 文档                                                                                                          |
-|--------------------------------------------|-----------------------------------|-------------------------------------------------------------------------------------------------------------|
+|--------------------------------------------|-------------------------------------------|-------------------------------------------------------------------------------------------------------------|
-| `AutoRegisterModuleAttribute`              | 为模块类生成 `Install(IArchitecture)`   | [AutoRegisterModule 生成器](../source-generators/auto-register-module-generator.md)                            |
+| `AutoRegisterModuleAttribute`              | 为模块类生成 `Install(IArchitecture)`           | [AutoRegisterModule 生成器](../source-generators/auto-register-module-generator.md)                            |
-| `RegisterModelAttribute`                   | 声明模块内自动注册的 `IModel` 类型            | [AutoRegisterModule 生成器](../source-generators/auto-register-module-generator.md)                            |
+| `RegisterModelAttribute`                   | 声明模块内自动注册的 `IModel` 类型                    | [AutoRegisterModule 生成器](../source-generators/auto-register-module-generator.md)                            |
-| `RegisterSystemAttribute`                  | 声明模块内自动注册的 `ISystem` 类型           | [AutoRegisterModule 生成器](../source-generators/auto-register-module-generator.md)                            |
+| `RegisterSystemAttribute`                  | 声明模块内自动注册的 `ISystem` 类型                   | [AutoRegisterModule 生成器](../source-generators/auto-register-module-generator.md)                            |
-| `RegisterUtilityAttribute`                 | 声明模块内自动注册的 `IUtility` 类型          | [AutoRegisterModule 生成器](../source-generators/auto-register-module-generator.md)                            |
+| `RegisterUtilityAttribute`                 | 声明模块内自动注册的 `IUtility` 类型                  | [AutoRegisterModule 生成器](../source-generators/auto-register-module-generator.md)                            |
-| `AutoUiPageAttribute`                      | 为 `CanvasItem` 页面节点生成 `GetPage()` | [AutoUiPage 生成器](../source-generators/auto-ui-page-generator.md)                                            |
+| `AutoUiPageAttribute`                      | 为 `CanvasItem` 页面节点生成 `GetPage()`         | [AutoUiPage 生成器](../source-generators/auto-ui-page-generator.md)                                            |
-| `AutoSceneAttribute`                       | 为场景根节点生成 `GetScene()`             | [AutoScene 生成器](../source-generators/auto-scene-generator.md)                                               |
+| `AutoSceneAttribute`                       | 为场景根节点生成 `GetScene()`                     | [AutoScene 生成器](../source-generators/auto-scene-generator.md)                                               |
-| `AutoRegisterExportedCollectionsAttribute` | 为宿主类开启导出集合批量注册生成                  | [AutoRegisterExportedCollections 生成器](../source-generators/auto-register-exported-collections-generator.md) |
+| `AutoLoadAttribute`                        | 显式声明 `project.godot` AutoLoad 与 C# 节点类型映射 | [Godot 项目元数据生成器](../source-generators/godot-project-generator.md)                                           |
-| `RegisterExportedCollectionAttribute`      | 指定集合与注册器成员的映射关系                   | [AutoRegisterExportedCollections 生成器](../source-generators/auto-register-exported-collections-generator.md) |
+| `AutoRegisterExportedCollectionsAttribute` | 为宿主类开启导出集合批量注册生成                          | [AutoRegisterExportedCollections 生成器](../source-generators/auto-register-exported-collections-generator.md) |
+| `RegisterExportedCollectionAttribute`      | 指定集合与注册器成员的映射关系                           | [AutoRegisterExportedCollections 生成器](../source-generators/auto-register-exported-collections-generator.md) |
 
 ## 常见用法示例
 

docs/zh-CN/source-generators/godot-project-generator.md

@@ -0,0 +1,172 @@
+# Godot 项目元数据生成器
+
+> 从 `project.godot` 生成 AutoLoad 与 Input Action 的强类型访问入口。
+
+## 概述
+
+`GFramework.Godot.SourceGenerators` 会读取 Godot 项目根目录下的 `project.godot`，并把其中最常用的项目级元数据暴露为稳定的编译期
+API。
+
+当前覆盖：
+
+- `[autoload]` 段：生成 `GFramework.Godot.Generated.AutoLoads`
+- `[input]` 段：生成 `GFramework.Godot.Generated.InputActions`
+
+这项能力的目标不是替代场景级生成器，而是把 Godot 工程配置和 C# 代码之间的字符串约定收敛到编译期。
+
+## 接入方式
+
+### NuGet 引用
+
+当项目通过 NuGet 引用 `GeWuYou.GFramework.Godot.SourceGenerators` 时，生成器会默认把项目根目录下的 `project.godot` 加入
+`AdditionalFiles`。
+
+如需覆盖默认路径，可以设置：
+
+- 可以改成项目根目录下的其他相对路径
+- 文件名必须仍然是 `project.godot`，否则生成器会给出警告并忽略该文件
+
+```xml
+<PropertyGroup>
+  <GFrameworkGodotProjectFile>Config/project.godot</GFrameworkGodotProjectFile>
+</PropertyGroup>
+```
+
+### 仓库内直接引用生成器
+
+如果你通过 `ProjectReference(OutputItemType=Analyzer)` 直接引用生成器项目，则需要手动加入：
+
+```xml
+<ItemGroup>
+  <AdditionalFiles Include="project.godot" />
+</ItemGroup>
+```
+
+## AutoLoad 访问层
+
+### 基础行为
+
+假设 `project.godot` 中声明了：
+
+```ini
+[autoload]
+GameServices="*res://autoload/game_services.tscn"
+AudioBus="*res://autoload/audio_bus.gd"
+```
+
+生成器会产出：
+
+```csharp
+using GFramework.Godot.Generated;
+
+var gameServices = AutoLoads.GameServices;
+
+if (AutoLoads.TryGetAudioBus(out var audioBus))
+{
+}
+```
+
+- 对于能唯一映射到 C# 节点类型的条目，属性会是强类型的
+- 对于无法映射或对应非 C# 脚本的条目，属性会退化为 `Godot.Node`
+- 生成器通过 `Godot.Engine.GetMainLoop()` 与当前 `SceneTree.Root` 解析 `/root/<AutoLoadName>` 节点
+
+### 显式映射
+
+当 AutoLoad 名称无法仅靠类名唯一推断时，可以使用 `[AutoLoad]` 明确指定：
+
+```csharp
+using GFramework.Godot.SourceGenerators.Abstractions;
+using Godot;
+
+[AutoLoad("GameServices")]
+public partial class GameServices : Node
+{
+}
+```
+
+规则如下：
+
+- 显式 `[AutoLoad]` 映射优先于隐式类名推断
+- 标记了 `[AutoLoad]` 的类型必须继承 `Godot.Node`
+- 若多个类型映射到同一个 AutoLoad，生成器会报告诊断，并退化为 `Godot.Node` 访问器，直到映射唯一
+
+## Input Action 常量
+
+### 基础行为
+
+假设 `project.godot` 中有：
+
+```ini
+[input]
+move_up={
+}
+ui_cancel={
+}
+```
+
+生成器会产出：
+
+```csharp
+using GFramework.Godot.Generated;
+
+if (Input.IsActionJustPressed(InputActions.MoveUp))
+{
+}
+```
+
+转换规则：
+
+- `move_up` -> `MoveUp`
+- `ui_cancel` -> `UiCancel`
+- 非法字符会被清理后再转换为 PascalCase
+- 如果多个动作名落到同一个标识符，生成器会追加稳定数字后缀，例如 `MoveUp_2`
+
+## 与现有 Godot 生成器的关系
+
+这项能力和现有的场景级生成器是互补的：
+
+- `AutoLoads` / `InputActions` 解决的是项目级元数据访问
+- `[GetNode]` 解决的是场景节点引用注入
+- `[BindNodeSignal]` 解决的是节点事件订阅样板
+
+推荐组合方式：
+
+```csharp
+using GFramework.Godot.Generated;
+using GFramework.Godot.SourceGenerators.Abstractions;
+using Godot;
+
+public partial class MainHud : Control
+{
+    [GetNode]
+    private Button _startButton = null!;
+
+    public override void _Ready()
+    {
+        __InjectGetNodes_Generated();
+
+        if (Input.IsActionPressed(InputActions.UiCancel))
+        {
+        }
+
+        var services = AutoLoads.GameServices;
+    }
+}
+```
+
+## 诊断与约束
+
+当前会重点报告以下问题：
+
+- `[AutoLoad]` 标记在非 `Godot.Node` 类型上
+- 多个类型映射到同一个 AutoLoad 名称
+- 不同 AutoLoad 名称或 Input Action 名称在清洗后发生标识符冲突
+- `project.godot` 内部重复声明同名 AutoLoad 或 Input Action
+
+这些诊断的目的不是阻断所有生成，而是在可能的情况下保留稳定输出，同时把不确定性显式暴露出来。
+
+## 相关文档
+
+- [GetNode 生成器](./get-node-generator)
+- [BindNodeSignal 生成器](./bind-node-signal-generator)
+- [Godot 集成教程](../tutorials/godot-integration)

docs/zh-CN/source-generators/index.md

@@ -16,6 +16,7 @@ GFramework.SourceGenerators 是 GFramework 框架的源代码生成器包，通
 - [Priority 属性生成器](#priority-属性生成器)
 - [Context Get 注入生成器](#context-get-注入生成器)
 - [AutoRegisterModule 生成器](#autoregistermodule-生成器)
+- [Godot 项目元数据生成](#godot-项目元数据生成)
 - [GetNode 生成器 (Godot)](#getnode-生成器)
 - [BindNodeSignal 生成器 (Godot)](#bindnodesignal-生成器)
 - [AutoUiPage 生成器 (Godot)](#autouipage-生成器)
@@ -52,6 +53,7 @@ GFramework.SourceGenerators 利用 Roslyn 源代码生成器技术，在编译
 
 ### Godot 专用生成器
 
+- **Godot 项目元数据生成 (Godot)**：从 `project.godot` 生成 AutoLoad 与 Input Action 的强类型访问入口
 - **[GetNode] 属性 (Godot)**：自动获取 Godot 节点引用，支持多种查找模式
 - **[BindNodeSignal] 属性 (Godot)**：自动生成 Godot 节点信号绑定与解绑逻辑
 - **[AutoUiPage] 属性 (Godot)**：自动生成 UI 页面行为包装与页面 Key
@@ -435,6 +437,64 @@ public enum PlayerState
 | GenerateIsMethods  | bool | true | 是否为每个枚举值生成 IsX 方法 |
 | GenerateIsInMethod | bool | true | 是否生成 IsIn 方法      |
 
+## Godot 项目元数据生成
+
+Godot 项目元数据生成器会读取 `project.godot`，把项目级配置转换为稳定的编译期 API。
+
+当前生成两个统一入口：
+
+- `GFramework.Godot.Generated.AutoLoads`
+- `GFramework.Godot.Generated.InputActions`
+
+默认情况下，NuGet 包引用会自动把项目根目录下的 `project.godot` 加入 `AdditionalFiles`。如果你是在仓库内通过 analyzer
+形式直接引用生成器，则需要手动加入：
+
+```xml
+<ItemGroup>
+    <AdditionalFiles Include="project.godot"/>
+</ItemGroup>
+```
+
+### AutoLoad 映射
+
+当某个 AutoLoad 不能仅靠类名唯一推断到 C# 节点类型时，可以使用 `[AutoLoad]` 指定映射：
+
+```csharp
+using GFramework.Godot.SourceGenerators.Abstractions;
+using Godot;
+
+[AutoLoad("GameServices")]
+public partial class GameServices : Node
+{
+}
+```
+
+生成后可以直接使用：
+
+```csharp
+using GFramework.Godot.Generated;
+
+var services = AutoLoads.GameServices;
+
+if (AutoLoads.TryGetAudioBus(out var audioBus))
+{
+}
+```
+
+### Input Action 常量
+
+`[input]` 段会被转换为强类型常量：
+
+```csharp
+using GFramework.Godot.Generated;
+
+if (Input.IsActionPressed(InputActions.MoveUp))
+{
+}
+```
+
+完整说明请见：[Godot 项目元数据生成器](./godot-project-generator)
+
 ## GetNode 生成器
 
 GetNode 生成器为标记了 `[GetNode]` 特性的字段自动生成 Godot 节点获取代码，无需手动调用 `GetNode<T>()` 方法。

docs/zh-CN/tutorials/godot-integration.md

@@ -14,6 +14,25 @@
 
 ## Godot 特定功能
 
+### 0. project.godot 编译期接入
+
+如果项目引用了 `GFramework.Godot.SourceGenerators`，现在可以直接把 `project.godot` 中的 AutoLoad 与 Input Action 暴露为强类型
+API：
+
+```csharp
+using GFramework.Godot.Generated;
+
+var services = AutoLoads.GameServices;
+
+if (Input.IsActionPressed(InputActions.MoveUp))
+{
+}
+```
+
+这项能力适合和 `[GetNode]`、`[BindNodeSignal]` 一起使用：前者解决项目级配置入口，后两者解决场景级节点和事件样板。
+
+详细说明见：[Godot 项目元数据生成器](../source-generators/godot-project-generator)
+
 ### 1. 节点生命周期绑定
 
 GFramework.Godot 提供了与 Godot 节点生命周期的无缝集成，确保框架初始化与 Godot 场景树同步。
@@ -1335,4 +1354,4 @@ public class GodotPerformanceTests
 ---
 
 **教程版本**: 1.0.0  
-**更新日期**: 2026-01-12
+**更新日期**: 2026-04-14