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diff --git a/lisp/td-shell.el b/lisp/td-shell.el
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+;;; td-shell.el --- a shell and a repl! -*- lexical-binding: t; -*-
+
+;;; Code:
+
+;;; Functions
+
+(defun td/meow-insert-state (mode)
+  "If meow is installed, start `mode' in INSERT state."
+  (when (package-installed-p 'meow)
+    (add-to-list 'meow-mode-state-list `(,mode . insert))))
+
+(defun td/eshell-prompt ()
+  (concat
+   (propertize (abbreviate-file-name (eshell/pwd)) 'face `(:foreground "white"))
+   (if (zerop (user-uid))
+       (propertize " # " 'face `(:foreground "red"))
+     (propertize " λ " 'face `(:foreground "yellow")))))
+
+(defun td/eshell-configure ()
+  (require 'xterm-color)
+  (push 'xterm-color-filter eshell-preoutput-filter-functions)
+  (delq 'eshell-handle-ansi-color eshell-output-filter-functions)
+
+  (add-hook 'eshell-before-prompt-hook
+            (lambda ()
+              (setq xterm-color-preserve-properties t)))
+
+  ;; Use xterm-256color when running interactive commands.
+  (add-hook 'eshell-pre-command-hook
+            (lambda () (setenv "TERM" "xterm-256color")))
+  (add-hook 'eshell-post-command-hook
+            (lambda () (setenv "TERM" "dumb")))
+
+  ;; Save command history when commands are entered.
+  (add-hook 'eshell-pre-command-hook 'eshell-save-some-history)
+
+  ;; Initialize the shell history.
+  (eshell-hist-initialize)
+
+  ;; Truncate buffer for performance.
+  (add-to-list 'eshell-output-filter-functions 'eshell-truncate-buffer)
+
+  (setq eshell-prompt-function           'td/eshell-prompt
+        eshell-prompt-regexp             "^.+ λ "
+        eshell-history-size              10000
+        eshell-buffer-maximum-lines      10000
+        eshell-hist-ignoredups           t
+        eshell-highlight-prompt          t
+        eshell-scroll-to-bottom-on-input t
+        eshell-prefer-lisp-functions     nil))
+
+(defun td/eshell-clear ()
+  "Allow the user to clear the current eshell buffer while retaining the
+current line input."
+  (interactive)
+  (let ((input (eshell-get-old-input)))
+    (eshell/clear t)
+    (eshell-emit-prompt)
+    (insert input)))
+
+;;; Packages
+
+(use-package eat
+  :ensure t
+  :bind (("C-x S" . eat))
+  :custom
+  (eat-enable-autoline-mode t)
+  (eat-kill-buffer-on-exit t)
+  :config
+  (td/meow-insert-state 'eat-mode))
+
+(use-package eshell
+  :ensure nil
+  :hook (eshell-first-time-mode . td/eshell-configure)
+  :bind (("C-l" . td/eshell-clear))
+  :config
+  (td/meow-insert-state 'eshell-mode))
+
+(use-package eshell-syntax-highlighting
+  :ensure t
+  :after eshell
+  :config
+  (eshell-syntax-highlighting-global-mode +1))
+
+(use-package xterm-color)
+
+(provide 'td-shell)
+;;; td-shell.el ends here