User wants to know how close to exhausting context so they know that the reset requirement is coming up fast

As a user, and a software developer for 40 years, I must say, I am gobsmacked at what Claude can do to extend my ability as a Java full stack engineer.
But, it would be quite helpful if I knew that I was coming up to my limit of context, because it is always a surprise when I do hit the limit and it might be four hours before I can continue my efforts. It would be great to just have a running counter there to tell me that I am N% of context used.