diff --git a/users/crumb/programs/emacs/init.el b/users/crumb/programs/emacs/init.el
index 98a247b..5dbf6c6 100644
--- a/users/crumb/programs/emacs/init.el
+++ b/users/crumb/programs/emacs/init.el
@@ -16,6 +16,7 @@
 (require 'syd-age)
 (require 'syd-autosave)
 (require 'syd-completion)
+(require 'syd-custom)
 (require 'syd-display-startup-time)
 (require 'syd-evil)
 (require 'syd-keybinds)
diff --git a/users/crumb/programs/emacs/lib/syd-constants.el b/users/crumb/programs/emacs/lib/syd-constants.el
index 8e2180a..a84ea6e 100644
--- a/users/crumb/programs/emacs/lib/syd-constants.el
+++ b/users/crumb/programs/emacs/lib/syd-constants.el
@@ -3,11 +3,15 @@
 (defvar syd-data-dir
   (or (getenv "EMACS_DATA_DIR")
       (error "Need $EMACS_DATA_DIR"))
-  "Directory analogous to XDG_DATA_HOME for miscellaneous Emacs things.")
+  "Directory analogous to XDG_DATA_HOME for miscellaneous Emacs things.  Sydnix
+will wipe this on boot!")
 
 (defvar syd-cache-dir
   (or (getenv "EMACS_CACHE_DIR")
-      (error "Need $EMACS_CACHE_DIR")))
+      (error "Need $EMACS_CACHE_DIR"))
+  "Directory analogous to XDG_CACHE_HOME for miscellaneous Emacs things.  Sydnix
+will not usually wipe this on boot; /however/ it is still free to clear this
+directory at any time.")
 
 (provide 'syd-constants)
 ;;; syd-constants.el ends here
diff --git a/users/crumb/programs/emacs/modules/syd-custom.el b/users/crumb/programs/emacs/modules/syd-custom.el
new file mode 100644
index 0000000..5c03f2c
--- /dev/null
+++ b/users/crumb/programs/emacs/modules/syd-custom.el
@@ -0,0 +1,14 @@
+;;; syd-custom.el -*- lexical-binding: t; -*-
+
+;; To discourage use of the custom file, we store it somewhere will
+;; Impermanence will wipe it.
+(use-package emacs
+  ;; TODO: I'd like to allow /some/ custom variables.  E.g., the trusted
+  ;; dir-locals files.  See `hack-dir-local-variables'.  It has some hooks that
+  ;; should make this accomplishable.
+  :custom (custom-file (file-name-concat syd-data-dir "custom.el"))
+  :config
+  (when (file-readable-p custom-file)
+    (load custom-file)))
+
+(provide 'syd-custom)