diff --git a/config/tmux.conf b/config/tmux.conf
index cec7258..8df0cd3 100644
--- a/config/tmux.conf
+++ b/config/tmux.conf
@@ -113,8 +113,8 @@ bind -T copy-mode-vi y send -X copy-selection-and-cancel
 bind -T copy-mode-vi MouseDragEnd1Pane send -X copy-selection-and-cancel
 
 # --- Capture & logging ---
-bind S capture-pane -pS - \; save-buffer ~/logs/capture-#{session_name}-#{window_index}-#{pane_index}-#(date +%s).txt \; display "Pane captured to ~/logs/"
-bind L pipe-pane -o "cat >> ~/logs/live-#{session_name}-#{window_index}-#(date +%s).log" \; display "Logging toggled"
+bind S run-shell 'tmux capture-pane -pS - > ~/logs/capture-#S-#I-#P-$(date +%%s).txt && tmux display "Pane captured to ~/logs/"'
+bind L pipe-pane -o 'cat >> ~/logs/live-#S-#I.log' \; display "Logging toggled"
 
 # --- Clipboard ---
 set -g set-clipboard on
@@ -154,5 +154,9 @@ set -g default-terminal "tmux-256color"
 set -ga terminal-overrides ",xterm-256color:Tc"
 set -sg escape-time 10
 
+# --- Help tab shortcut ---
+# Ctrl-A ? = jump to help tab (or recreate if closed)
+bind ? if-shell 'tmux select-window -t help 2>/dev/null' '' 'new-window -n help /opt/sethmux/sethmux-help.sh'
+
 # --- Session startup layout ---
-# Windows created by sethmux-start.sh: code, git, run, logs
+# Windows created by sethmux-start.sh: code, git, run, logs, help
diff --git a/sethmux-help.sh b/sethmux-help.sh
new file mode 100755
index 0000000..95a57f1
--- /dev/null
+++ b/sethmux-help.sh
@@ -0,0 +1,79 @@
+#!/bin/bash
+# sethmux cheat sheet — runs in the persistent help tab
+# Redraws on terminal resize via trap
+
+draw() {
+  clear
+  COLS=$(tput cols)
+  W=$((COLS > 80 ? 80 : COLS))
+
+  ORANGE=$'\033[38;2;211;84;0m'
+  DIM=$'\033[2m'
+  BOLD=$'\033[1m'
+  WHITE=$'\033[97m'
+  GRAY=$'\033[90m'
+  RST=$'\033[0m'
+  UL=$'\033[4m'
+
+  echo ""
+  echo "${ORANGE}${BOLD}  sethmux cheat sheet${RST}"
+  echo "${GRAY}  ─────────────────────────────────────────────${RST}"
+  echo ""
+  echo "${ORANGE}${UL}Tabs${RST}${GRAY} (kitty-style)${RST}"
+  echo "  ${WHITE}Ctrl+Shift+T${RST}         New tab"
+  echo "  ${WHITE}Ctrl+Shift+W${RST}         Close tab"
+  echo "  ${WHITE}Ctrl+Shift+Right${RST}     Next tab"
+  echo "  ${WHITE}Ctrl+Shift+Left${RST}      Previous tab"
+  echo "  ${WHITE}Ctrl+Shift+1-9${RST}       Go to tab N"
+  echo "  ${WHITE}Ctrl+Shift+. / ,${RST}     Move tab fwd / back"
+  echo ""
+  echo "${ORANGE}${UL}Splits & Panes${RST}"
+  echo "  ${WHITE}Ctrl+Shift+Enter${RST}     New split"
+  echo "  ${WHITE}Ctrl+Shift+] / [${RST}     Next / prev pane"
+  echo "  ${WHITE}Ctrl+Shift+L${RST}         Cycle layouts"
+  echo "  ${WHITE}F11${RST}                  Zoom pane (fullscreen)"
+  echo "  ${WHITE}Ctrl-A v${RST}             Split vertical  ${DIM}(dvorak)${RST}"
+  echo "  ${WHITE}Ctrl-A s${RST}             Split horizontal ${DIM}(dvorak)${RST}"
+  echo ""
+  echo "${ORANGE}${UL}Scrollback & Copy${RST}"
+  echo "  ${WHITE}Ctrl+Shift+Up/Down${RST}   Scroll line"
+  echo "  ${WHITE}Ctrl+Shift+PgUp/Dn${RST}   Scroll page"
+  echo "  ${WHITE}Ctrl+Shift+Home/End${RST}  Top / bottom"
+  echo "  ${WHITE}Ctrl+Shift+H${RST}         Scrollback in pager"
+  echo "  ${WHITE}Ctrl+Shift+C${RST}         Enter copy mode (vi)"
+  echo "  ${WHITE}Ctrl+Shift+V${RST}         Paste"
+  echo "  ${DIM}  In copy mode: v=select  y=yank  q=quit${RST}"
+  echo ""
+  echo "${ORANGE}${UL}AI Workflow${RST}"
+  echo "  ${WHITE}Ctrl-A S${RST}             Save pane → ~/logs/"
+  echo "  ${WHITE}Ctrl-A L${RST}             Toggle live logging"
+  echo "  ${WHITE}Ctrl+Shift+Delete${RST}    Clear terminal+history"
+  echo ""
+  echo "${ORANGE}${UL}Quick Access${RST}${GRAY} (no prefix)${RST}"
+  echo "  ${WHITE}Alt-T${RST}                New tab"
+  echo "  ${WHITE}Alt-W${RST}                Close tab"
+  echo "  ${WHITE}Alt-1..5${RST}             Go to tab 1-5"
+  echo "  ${WHITE}Alt-Left/Right${RST}       Prev / next tab"
+  echo ""
+  echo "${ORANGE}${UL}Session Windows${RST}"
+  echo "  ${WHITE}1:code${RST}  ${WHITE}2:git${RST}  ${WHITE}3:run${RST}  ${WHITE}4:logs${RST}  ${WHITE}5:help${RST} ${DIM}(this)${RST}"
+  echo ""
+  echo "${ORANGE}${UL}Mobile Toolbar${RST}"
+  echo "  ${DIM}Row 1:${RST} +Tab Next Prev │ ^C ^D Clr │ Esc Tab ▲ ▼"
+  echo "  ${DIM}Row 2:${RST} Sel Paste Zoom Save │ V.Spl H.Spl Pane Kill"
+  echo ""
+  echo "${ORANGE}${UL}Notifications${RST}"
+  echo "  ${WHITE}sethmux-notify \"msg\"${RST}  Push to browser"
+  echo "  ${WHITE}cmd | sethmux-notify${RST}  Pipe output"
+  echo ""
+  echo "${GRAY}  ─────────────────────────────────────────────${RST}"
+  echo "${GRAY}  Status bar shows: cwd + git branch + time${RST}"
+  echo "${GRAY}  Scrollback: 200K lines  │  Prefix: Ctrl-A${RST}"
+  echo ""
+}
+
+trap draw WINCH
+draw
+
+# Stay alive, redraw on resize
+while true; do sleep 86400; done
diff --git a/sethmux-start.sh b/sethmux-start.sh
index 9aeffa2..20534fe 100755
--- a/sethmux-start.sh
+++ b/sethmux-start.sh
@@ -11,6 +11,7 @@ tmux new-session -d -s "$SESSION" -n "code" -x 120 -y 40
 tmux new-window -t "$SESSION" -n "git"
 tmux new-window -t "$SESSION" -n "run"
 tmux new-window -t "$SESSION" -n "logs"
+tmux new-window -t "$SESSION" -n "help" "/opt/sethmux/sethmux-help.sh"
 tmux select-window -t "$SESSION:1"
 
 # Ensure logs dir exists