This package provides an interface to xref based on completing-read. It is a shameless clone of ivy-xref that uses completing-read instead of ivy. It is intended to work well with selectrum.
(use-package completing-read-xref
:straight (completing-read-xref :type git :host github :repo "travitch/completing-read-xref.el")
:commands (completing-read-xref-show-xrefs completing-read-xref-show-xrefs)
:init
(setq xref-show-definitions-function 'completing-read-xref-show-defs))