Compute shaders get included to every Assembly-CSharp-* project that has at least one single script in it.

If there are no scripts in the project, ".compute" files don't end up in any VS project - double clicking it merely opens it up in Visual Studio. If there are no editor or firstpass C# scripts in the project, it ends up in the only project that exists. If there are editor or firstpass C# scripts, the ".compute" shader file ends up in all the project, which causes issues when double clicking it in the solution explorer (picture attached).