diff --git a/.tmux.conf b/.tmux.conf
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+# -------------------------
+# Developer Layout Presets
+# -------------------------
+
+# 1 pane (focus mode)
+bind-key 1 run-shell "tmux kill-pane -a"
+
+# 2 panes (dev mode)
+bind-key 2 run-shell "
+  tmux kill-pane -a
+  tmux split-window -h
+  tmux select-layout even-horizontal
+"
+
+# 3 panes
+bind-key 3 run-shell "
+  tmux kill-pane -a
+  tmux split-window -h
+  tmux split-window -v
+  tmux select-layout tiled
+"
+
+# 4 panes
+bind-key 4 run-shell "
+  tmux kill-pane -a
+  tmux split-window -h
+  tmux split-window -v
+  tmux select-pane -t 0
+  tmux split-window -v
+  tmux select-layout tiled
+"
+
+# 6 panes
+bind-key 6 run-shell "
+  tmux kill-pane -a
+  i=1
+  while [ \"$i\" -le 5 ]; do
+    tmux split-window
+    i=$((i + 1))
+  done
+  tmux select-layout tiled
+"
+
+# 8 panes (monitor mode)
+bind-key 8 run-shell "
+  tmux kill-pane -a
+  i=1
+  while [ \"$i\" -le 7 ]; do
+    tmux split-window
+    i=$((i + 1))
+  done
+  tmux select-layout tiled
+"
+
+# 9: toggle zoom for current pane
+bind-key 9 resize-pane -Z
+
+# Grid auto-arrange helper
+bind-key g select-layout tiled