Sounds like no prisoner rights at all.
Surely you realize that Texas and other States ALSO require inmates who are medically eligible to work in various jobs, including some in the fields with an aggy (and not the skool type of aggy).
Most Texas prisons are NOT air conditioned. Some have had to retrofit after some older sex offenders whined and sniveled in federal court. Are Texas prisons without A/C pleasant? Not really. But they were not unbearable. I know...I worked in several of them at the start of my career.
We were already molly-coddling them even before the 1992 Consent Decree.