let-completion-mode promotes local variables from enclosing binding forms to
the top of the completion candidate list, annotates each with its binding value
when short enough or a [local] tag otherwise, and provides the full
pretty-printed fontified expression in corfu-popupinfo or any completion UI that
reads :company-doc-buffer. Value extraction walks the raw buffer text of
literal let, let*, when-let*, if-let*, and-let*, dolist, and
dotimes binding lists. Names from forms the built-in elisp--local-variables
misses (untrusted buffers, macroexpansion failure) are injected into the
completion table directly so they always appear as candidates. The package
installs a single around-advice on elisp-completion-at-point when enabled and
removes it when disabled.
;; Enable for Emacs Lisp buffers.
(add-hook 'emacs-lisp-mode-hook #'let-completion-mode)
;; Show inline values up to 5 characters (the default).
;; Set to nil to always show [local] instead.
;; (setq let-completion-inline-max-width 5)
