Why doesn't my incremental C# code generator run?

I am writing a code generator to add functions to existing interfaces and that sort of thing. But I can't even get the project to launch.

To be clear, it builds, compiles, goes through all the motions, but if I start off Initialize with Debugger.Launch() I never get the option to break in.

I'm running in debug mode.

I have this config:

<PropertyGroup>
    <TargetFramework>net8.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
    <EmitCompilerGeneratedFiles>true</EmitCompilerGeneratedFiles>
    <CompilerGeneratedFilesOutputPath>$(BaseIntermediateOutputPath)\Generated</CompilerGeneratedFilesOutputPath>
</PropertyGroup>

<!--NugetPackages-->
<ItemGroup>
    <ProjectReference Include="..\..\SourceGeneration\SourceGenerator\SourceGenerator.csproj"
                      OutputItemType="Analyzer" ReferenceOutputAssembly="false"/>
</ItemGroup>

In my target project (that is, the project I want to augment).

My source generating project looks like this:

<Project Sdk="Microsoft.NET.Sdk">

    <PropertyGroup>
        <TargetFramework>netstandard2.0</TargetFramework>
        <LangVersion>latest</LangVersion>
        <OutputItemType>Analyzer</OutputItemType>
        <EnforceExtendedAnalyzerRules>true</EnforceExtendedAnalyzerRules>
        <IsRoslynComponent>true</IsRoslynComponent>
        <EmitCompilerGeneratedFiles>true</EmitCompilerGeneratedFiles>
        <EnforceExtendedAnalyzerRules>true</EnforceExtendedAnalyzerRules>
        <CompilerGeneratedFilesOutputPath>$(BaseIntermediateOutputPath)\Generated</CompilerGeneratedFilesOutputPath>
    </PropertyGroup>

    <ItemGroup>
        <PackageReference Include="Microsoft.CodeAnalysis.Common" Version="4.13.0" />
        <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.13.0" />
        <PackageReference Include="Microsoft.CodeAnalysis.Analyzers" Version="3.11.0" PrivateAssets="all" />
    </ItemGroup>
    <ItemGroup>
      <ProjectReference Include="..\SourceGeneratorShared\SourceGeneratorShared.csproj" />
    </ItemGroup>

</Project>

And my initialization code looks like this:

[Generator]
public class InterfaceStuff : IIncrementalGenerator
{
    public void Initialize(IncrementalGeneratorInitializationContext context)
    {
        Debugger.Launch();
        Debugger.Break();

        var provider = context.SyntaxProvider.CreateSyntaxProvider(
                predicate: static (node, _) => IsTargetClass(node),
                transform: static (ctx, _) => GetTargetInfo(ctx))
                    .Where(static info => info is not null).Collect();

        context.RegisterSourceOutput(provider, (ctx, collected) =>
            {
                foreach (var item in collected)
                {
                    var source = GenerateSource(item!);
                    ctx.AddSource($"{item.ClassName}.g.cs", SourceText.From(source, Encoding.UTF8));
                }
            });
    }
}

A few more details:

• Generated folders get generated in the expected locations, but don't contain anything
• My approach to getting the code to rebuild is to change code in both projects, clean the entire solution, and rebuild the target project. I have gone so far as to commit all of my code, delete everything, and rebuild.

If you need anything else, please let me know in the comments.