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diff --git a/modules/popper-config.el b/modules/popper-config.el
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+;;; popper-config.el --- secondary buffers to popup -*- lexical-binding: t; coding: utf-8; -*-
+;; author: Craig Jennings <c@cjennings.net>
+;;
+;;; Commentary:
+;;
+;; Configuration for popper.el, which manages secondary buffers as popup windows.
+;; Popup buffers (like *Messages*, help, and compilation output) are displayed in
+;; a dedicated bottom window and can be easily toggled, cycled, or promoted to
+;; regular windows.
+;;
+;; Keybindings:
+;;   C-`   - Toggle popup window visibility
+;;   M-`   - Cycle through open popup buffers
+;;   C-M-` - Promote popup to regular window or demote back to popup
+;;
+;;; Code:
+
+(use-package popper
+  :bind (("C-`"   . popper-toggle)
+         ("M-`"   . popper-cycle)
+         ("C-M-`" . popper-toggle-type))
+  :custom
+  (popper-display-control-nil)
+  :init
+  (setq popper-reference-buffers
+        '("\\*Messages\\*"
+          "Output\\*$"
+          "\\*Async Shell Command\\*"
+          help-mode
+          compilation-mode))
+  (add-to-list 'display-buffer-alist
+               '(popper-display-control-p  ; Predicate to match popper buffers
+                 (display-buffer-in-side-window)
+                 (side . bottom)
+                 (slot . 0)
+                 (window-height . 0.5)))  ; Half the frame height
+  (popper-mode +1)
+  (popper-echo-mode +1))
+
+(provide 'popper-config)
+;;; popper-config.el ends here.