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diff --git a/lisp/core/init-packages.el b/lisp/core/init-packages.el
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+;;; init-packages.el --- Package management -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2026 Richard Qin
+;; SPDX-License-Identifier: GPL-3.0-or-later
+
+;; Author: Richard Qin
+;; This file is not part of GNU Emacs.
+
+;;; Commentary:
+
+;; Configure package archives and initialize package.el.
+;; Use use-package for declarative package configuration.
+
+;;; Code:
+
+;; ------------------------------------------------------------
+;; Package archives
+;; ------------------------------------------------------------
+
+(require 'package)
+
+(setq package-archives
+      '(("gnu"    . "https://elpa.gnu.org/packages/")
+        ("nongnu" . "https://elpa.nongnu.org/nongnu/")
+        ("melpa"  . "https://melpa.org/packages/")))
+
+;; Prefer GNU ELPA and NonGNU ELPA.
+(setq package-archive-priorities
+      '(("gnu"    . 30)
+        ("nongnu" . 20)
+        ("melpa"  . 10)))
+
+
+;; ------------------------------------------------------------
+;; Initialize package.el
+;; ------------------------------------------------------------
+
+(package-initialize)
+
+
+;; ------------------------------------------------------------
+;; use-package
+;; ------------------------------------------------------------
+
+(require 'use-package)
+
+;; Enable package loading diagnostics.
+(setq use-package-verbose t)
+
+(provide 'init-packages)
+
+;;; init-packages.el ends here