If only we could use software to query the text of the bills.
But it is far from the work of a person skilled in real summarization, because real summarization requires you to predict what I care about based on the world at large.
But, realistically, that would never happen as it's not information that I think people would be comfortable providing.
At the federal level, the US has a great bulk api from GPO/FDSys, including full bill text in plain, pdf, and XML.
At the state level Openstates.org does it, including with an API.
A lot of us in the space have mess with various "git diff" type solutions, but unfortunately the way bill text changes doesn't lend itself to this.