diff --git a/.tmux b/.tmux
new file mode 100755
index 00000000..3c52e8e3
--- /dev/null
+++ b/.tmux
@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+
+set -o errexit
+
+# 1. Vim.
+tmux send-keys -t "$1:1" "nvim" Enter
+
+# 2. Server.
+tmux new-window -t "$1" -c "$PWD"
+tmux send-keys -t "$1:2" "./run start" Enter
+
+tmux split-window -t "$1" -v
+tmux send-keys -t "$1:2.bottom" "(cd assets && ../run npm:build:css)" Enter
+
+# 3. General shell use.
+tmux new-window -t "$1" -c "$PWD"
+tmux send-keys -t "$1:3" "git status" Enter
+
+tmux new-window -t "$1" -c "$PWD/source/_daily_emails"
+
+tmux select-window -t "$1:1"