Add notes session akin to agent session

notes-cmd.sh

@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+# Open neovim in the notes directory.
+# Detaches the client if all panes in the window are dead afterwards.
+
+notes_dir="$HOME/Documents/Notes"
+
+nvim "$notes_dir" || true
+
+# Brief delay to let tmux update pane status
+sleep 0.1
+
+window_id=$(tmux display-message -p '#{window_id}')
+my_pane=$(tmux display-message -p '#{pane_id}')
+
+# Count live sibling panes (not us, not dead)
+other_live=$(tmux list-panes -t "$window_id" -F '#{pane_id} #{pane_dead}' \
+  | awk -v me="$my_pane" '$1 != me && $2 == "0"' | wc -l | tr -d ' ')
+
+if [ "$other_live" -eq 0 ]; then
+  # No live siblings — close the popup and kill the window
+  # (also cleans up any dead siblings).
+  tmux detach-client
+  tmux kill-window -t "$window_id" 2>/dev/null || true
+else
+  # User has split off other live panes — only kill ours, keep popup open.
+  tmux kill-pane 2>/dev/null || true
+fi