Frame/Assets/Scripts/Procedure/ProcedureAttribute.cs

using System;

namespace Game;

[AttributeUsage(AttributeTargets.Class)]
class ProcedureAttribute: Attribute
{
    public ProcedureType ProcedureType { get; set; }

    public ProcedureAttribute(ProcedureType type)
    {
        this.ProcedureType = type;
    }
}