+#+begin_src emacs-lisp
+(use-package highlight-indent-guides
+ :defer 2
+ :hook ((prog-mode . highlight-indent-guides-mode)
+ ;; (org-mode . highlight-indent-guides-mode)
+ )
+ :config
+ (setq highlight-indent-guides-character ?\|)
+ (setq highlight-indent-guides-auto-enabled nil)
+ (setq highlight-indent-guides-method 'character)
+ (setq highlight-indent-guides-responsive 'top)
+ (set-face-foreground 'highlight-indent-guides-character-face "gainsboro")
+ (set-face-foreground 'highlight-indent-guides-top-character-face "grey40")) ; grey13 is nice too
+#+end_src
+
+** pdf-tools
+
+#+begin_src emacs-lisp
+(use-package pdf-tools
+ :magic ("%PDF" . pdf-view-mode)
+ :config
+ (setq pdf-view-resize-factor 1.05)
+ (pdf-tools-install)
+ :bind
+ (:map pdf-view-mode-map
+ ("C-s" . isearch-forward)
+ ("C-r" . isearch-backward)
+ ("j" . pdf-view-next-line-or-next-page)
+ ("k" . pdf-view-previous-line-or-previous-page)
+ ("h" . image-backward-hscroll)
+ ("l" . image-forward-hscroll)))
+#+end_src
+
+** anzu
+
+#+begin_src emacs-lisp
+(use-package anzu)
+#+end_src
+
+** typo.el
+
+#+begin_src emacs-lisp
+(use-package typo
+ :config
+ (typo-global-mode 1)
+ :hook (text-mode . typo-mode))
+#+end_src
+
+** slack
+
+Hopefully temporary.
+
+#+begin_src emacs-lisp
+(use-package slack
+ :commands (slack-start)
+ :init
+ (eval-when-compile ; silence the byte-compiler
+ (defvar url-http-data nil)
+ (defvar url-http-extra-headers nil)
+ (defvar url-http-method nil)
+ (defvar url-callback-function nil)
+ (defvar url-callback-arguments nil)
+ (defvar oauth--token-data nil))
+ (setq slack-buffer-emojify t
+ slack-prefer-current-team t)
+ :config
+ (slack-register-team
+ :name "uw-apv"
+ :default t
+ :client-id uw-apv-client-id
+ :client-secret uw-apv-client-secret
+ :token uw-apv-token
+ :subscribed-channels '(general)
+ :full-and-display-names t)
+ (slack-register-team
+ :name "watform"
+ :default nil
+ :client-id watform-client-id
+ :client-secret watform-client-secret
+ :token watform-token
+ :subscribed-channels '(general)
+ :full-and-display-names t)
+ (add-to-list 'swiper-font-lock-exclude 'slack-message-buffer-mode t)
+ :bind
+ (("C-c s s" . slack-start)
+ ("C-c s u" . slack-select-unread-rooms)
+ ("C-c s b" . slack-select-rooms)
+ ("C-c s t" . slack-change-current-team)
+ ("C-c s c" . slack-ws-close)
+ :map slack-mode-map
+ ("M-p" . slack-buffer-goto-prev-message)
+ ("M-n" . slack-buffer-goto-next-message)
+ ("C-c e" . slack-message-edit)
+ ("C-c k" . slack-message-delete)
+ ("C-c C-k" . slack-channel-leave)
+ ("C-c r a" . slack-message-add-reaction)
+ ("C-c r r" . slack-message-remove-reaction)
+ ("C-c r s" . slack-message-show-reaction-users)
+ ("C-c p l" . slack-room-pins-list)
+ ("C-c p a" . slack-message-pins-add)
+ ("C-c p r" . slack-message-pins-remove)
+ ("@" . slack-message-embed-mention)
+ ("#" . slack-message-embed-channel)))
+
+(use-package alert
+ :commands (alert)
+ :init
+ (setq alert-default-style 'notifier))
+#+end_src
+
+* Email
+
+#+begin_src emacs-lisp
+(defvar amin-maildir (expand-file-name "~/mail/"))
+(after! recentf
+ (add-to-list 'recentf-exclude amin-maildir))
+#+end_src
+
+** Gnus
+
+#+begin_src emacs-lisp
+(setq
+ amin-gnus-init-file (no-littering-expand-etc-file-name "gnus")
+ mail-user-agent 'gnus-user-agent
+ read-mail-command 'gnus)
+
+(use-package gnus
+ :bind (("s-m" . gnus)
+ ("s-M" . gnus-unplugged))
+ :init
+ (setq
+ gnus-select-method '(nnnil "")
+ gnus-secondary-select-methods
+ '((nnimap "amin"
+ (nnimap-stream plain)
+ (nnimap-address "127.0.0.1")
+ (nnimap-server-port 143)
+ (nnimap-authenticator plain)
+ (nnimap-user "amin@aminb.org"))
+ (nnimap "uwaterloo"
+ (nnimap-stream plain)
+ (nnimap-address "127.0.0.1")
+ (nnimap-server-port 143)
+ (nnimap-authenticator plain)
+ (nnimap-user "abandali@uwaterloo.ca")))
+ gnus-message-archive-group "nnimap:Sent"
+ gnus-parameters
+ '(("gnu.*"
+ (gcc-self . t)))
+ gnus-large-newsgroup 50
+ gnus-home-directory (no-littering-expand-var-file-name "gnus/")
+ gnus-directory (concat gnus-home-directory "news/")
+ message-directory (concat gnus-home-directory "mail/")
+ nndraft-directory (concat gnus-home-directory "drafts/")
+ gnus-save-newsrc-file nil
+ gnus-read-newsrc-file nil
+ gnus-interactive-exit nil
+ gnus-gcc-mark-as-read t))
+
+(use-package gnus-art
+ :config
+ (setq
+ gnus-visible-headers
+ (concat gnus-visible-headers "\\|^List-Id:\\|^X-RT-Originator:\\|^User-Agent:")
+ gnus-sorted-header-list
+ '("^From:" "^Subject:" "^Summary:" "^Keywords:"
+ "^Followup-To:" "^To:" "^Cc:" "X-RT-Originator"
+ "^Newsgroups:" "List-Id:" "^Organization:"
+ "^User-Agent:" "^Date:")
+ ;; local-lapsed article dates
+ ;; from https://www.emacswiki.org/emacs/GnusFormatting#toc11
+ gnus-article-date-headers '(user-defined)
+ gnus-article-time-format
+ (lambda (time)
+ (let* ((date (format-time-string "%a, %d %b %Y %T %z" time))
+ (local (article-make-date-line date 'local))
+ (combined-lapsed (article-make-date-line date
+ 'combined-lapsed))
+ (lapsed (progn
+ (string-match " (.+" combined-lapsed)
+ (match-string 0 combined-lapsed))))
+ (concat local lapsed))))
+ (bind-keys
+ :map gnus-article-mode-map
+ ("r" . gnus-article-reply-with-original)
+ ("R" . gnus-article-wide-reply-with-original)
+ ("M-L" . org-store-link)))
+
+(use-package gnus-sum
+ :bind (:map gnus-summary-mode-map
+ :prefix-map amin--gnus-summary-prefix-map
+ :prefix "v"
+ ("r" . gnus-summary-reply)
+ ("w" . gnus-summary-wide-reply)
+ ("v" . gnus-summary-show-raw-article))
+ :config
+ (bind-keys
+ :map gnus-summary-mode-map
+ ("r" . gnus-summary-reply-with-original)
+ ("R" . gnus-summary-wide-reply-with-original)
+ ("M-L" . org-store-link)))
+
+(use-package gnus-msg
+ :config
+ (setq gnus-posting-styles
+ '((".*"
+ (address "amin@aminb.org"))
+ ("gnu.*"
+ (address "bandali@gnu.org"))
+ ("nnimap\\+uwaterloo:.*"
+ (address "abandali@uwaterloo.ca")
+ (gcc "\"nnimap+uwaterloo:Sent Items\"")))))
+
+(use-package gnus-topic
+ :hook (gnus-group-mode . gnus-topic-mode))
+
+(use-package gnus-agent
+ :config
+ (setq gnus-agent-synchronize-flags 'ask)
+ :hook (gnus-group-mode . gnus-agent-mode))
+
+(use-package gnus-group
+ :config
+ (setq gnus-permanently-visible-groups "\\((INBOX\\|gnu$\\)"))
+
+(use-package mm-decode
+ :config
+ (setq mm-discouraged-alternatives '("text/html" "text/richtext")))
+#+end_src
+
+** sendmail
+
+#+begin_src emacs-lisp