diff --git a/.dir-locals.el b/.dir-locals.el
new file mode 100644
index 00000000..14e99441
--- /dev/null
+++ b/.dir-locals.el
@@ -0,0 +1,19 @@
+;;; Directory Local Variables         -*- no-byte-compile: t; -*-
+;;; For more information see (info "(emacs) Directory Variables")
+((nil . ((tab-width . 8)
+         (fill-column . 80)
+         ;; (commment-fill-column . 80)
+         (emacs-lisp-docstring-fill-column . 65)
+         (bug-reference-url-format . "https://github.com/djcb/mu/issues/%s")))
+ (c-mode . ((c-file-style . "linux")
+            (indent-tabs-mode . t)
+            (mode . bug-reference-prog)))
+ (c++-mode . ((c-file-style . "linux")
+              (fill-column . 100)
+              ;; (comment-fill-column . 80)
+              (mode . bug-reference-prog)))
+ (emacs-lisp-mode . ((indent-tabs-mode . nil)
+                     (mode . bug-reference-prog)))
+ (lisp-data-mode . ((indent-tabs-mode . nil)))
+ (texinfo-mode . ((mode . bug-reference-prog)))
+ (org-mode . ((mode . bug-reference))))