Rider/ReSharper ignoring generated code

I have a .net core c# csproj with a BeforeTargets="CoreCompile" target. This target uses protoc to generate .cs files in $(BaseIntermediateOutputPath) (obj), and then adds them to the Compile group of the csproj. Everything there works fine and the types end up in the compiled assembly.

The issue is that I am unable to get Rider/ReSharper to identify these generated types and add them to the Intellisense. Does anyone know how to get ReSharper to recognize code generated as part of the build process?

I have tried adding the folder and file mask to the Generated Code settings, as well as adding the output cs files as <None> targets in the csproj.

<Target Name="CompileProto" BeforeTargets="CoreCompile">
  <PropertyGroup>
    <ProtoOutputPath Condition="'$(BaseIntermediateOutputPath)'!='' ">$(BaseIntermediateOutputPath)</ProtoOutputPath>
    <ProtoOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">obj</ProtoOutputPath>
  </PropertyGroup>
  <ItemGroup>
    <Protos Include="protos/*.proto" />
  </ItemGroup>
  <MakeDir Directories="$(ProtoOutputPath)" />
  <Exec Command="protoc -I=protos/ --csharp_out=$(ProtoOutputPath)/ --csharp_opt=file_extension=.g.cs @(Protos, ' ')" />
  <ItemGroup>
    <GeneratedProtos Include="$(ProtoOutputPath)/*.g.cs" />
    <Compile Include="@(GeneratedProtos)" />
    <FileWrites Include="@(GeneratedProtos)" />
  </ItemGroup>
</Target>