the most barest of barebones cms

Hi there.. .I have been looking for the most barest of barebones cms.

I do not need 90% of what is in most CMS systems. And even more so -  
typically The kind of sites I have been doing - they (clients) do not  
even want to be able to add new pages, but rather just more content  
to existing pages (into the database). So I kind of want to make one  
that is just the backend and leave the front end up to the developer  
100 % and just use regular php. Is there such a thing? Maybe just a  
framework?

d