snippet

Catch the small mistakes early

See buffer diagnostics without leaving Emacs.

built-in / development / diagnostics / eglot

Flymake displays diagnostics supplied by the current mode or another backend. The example enables the built-in Emacs Lisp backend; it does not assume that a checker is available for every programming language.

Run M-x flymake-show-buffer-diagnostics for a list, or use flymake-goto-next-error and flymake-goto-prev-error to move between findings.

Eglot already enables Flymake in buffers it manages. You do not need a second hook for those buffers, and other languages may need an appropriate backend or external checker.

(use-package flymake
  :ensure nil
  :hook (emacs-lisp-mode . flymake-mode))

Read the documentation