Rudy's OBTF

Install and configure

(with-eval-after-load 'package
  (add-to-list 'package-selected-packages 'auctex))

Recommended in the manual:

(with-eval-after-load 'tex
  (setopt TeX-auto-save t
          TeX-parse-self t
          TeX-master nil))

From https://emacs.stackexchange.com/questions/19472/how-to-let-auctex-open-pdf-with-pdf-tools:

(with-eval-after-load 'tex
  ;;
  ;; Use pdf-tools to open PDF files
  (setopt TeX-view-program-selection '((output-pdf "PDF Tools"))
          TeX-source-correlate-start-server t)
  ;;
  ;; Update PDF buffers after successful LaTeX runs
  (add-hook 'TeX-after-compilation-finished-functions
            #'TeX-revert-document-buffer))