feat: kitty-compatible keybindings via tmux extended-keys (CSI u)

All Ctrl+Shift shortcuts mapped to match kitty defaults:
- Ctrl+Shift+T/W/Left/Right for tab management
- Ctrl+Shift+Enter for splits, ]/[ for pane cycling
- Ctrl+Shift+C/V for copy/paste, H for scrollback pager
- Ctrl+Shift+1-9 for goto tab, F11 for fullscreen
- Dvorak extras and Alt shortcuts preserved alongside

config/tmux.conf

@@ -1,12 +1,91 @@
-# sethmux — Sethian tmux config for AI CLI workflows
-# Dvorak-optimized, mobile-friendly, built for long-running AI sessions
+# sethmux — kitty-compatible keybindings for tmux
+# Mirrors kitty's Ctrl+Shift+key shortcuts via extended-keys (CSI u)
+# Dvorak-optimized, mobile-friendly, built for AI CLI workflows
 
-# --- Prefix ---
+# --- Extended keys (required for Ctrl+Shift detection) ---
+set -g extended-keys on
+set -g extended-keys-format csi-u
+
+# --- No prefix for kitty-style bindings ---
+# Kitty uses Ctrl+Shift+key directly, no prefix needed.
+# We keep Ctrl-A as prefix for tmux-native stuff (capture, logging, etc.)
 unbind C-b
 set -g prefix C-a
 bind C-a send-prefix
 
-# --- Tab/Window management ---
+# ============================================================
+# Kitty-compatible keybindings (Ctrl+Shift+key)
+# ============================================================
+
+# --- Tab management ---
+bind -n C-S-t new-window -c "#{pane_current_path}"
+bind -n C-S-w kill-window
+bind -n C-S-Right next-window
+bind -n C-S-Left previous-window
+
+# Ctrl+Shift+1-9 = goto tab (tmux base-index 1)
+bind -n C-S-1 select-window -t 1
+bind -n C-S-2 select-window -t 2
+bind -n C-S-3 select-window -t 3
+bind -n C-S-4 select-window -t 4
+bind -n C-S-5 select-window -t 5
+bind -n C-S-6 select-window -t 6
+bind -n C-S-7 select-window -t 7
+bind -n C-S-8 select-window -t 8
+bind -n C-S-9 select-window -t 9
+
+# Ctrl+Shift+. / , = move tab forward/backward
+bind -n C-S-. swap-window -t +1 \; next-window
+bind -n C-S-, swap-window -t -1 \; previous-window
+
+# --- Window/split management ---
+# Ctrl+Shift+Enter = new split (kitty calls these "windows")
+bind -n C-S-Enter split-window -v -c "#{pane_current_path}"
+
+# Ctrl+Shift+] / [ = next/previous pane
+bind -n C-S-] select-pane -t :.+
+bind -n C-S-[ select-pane -t :.-
+
+# Ctrl+Shift+l = next layout (cycle through layouts)
+bind -n C-S-l next-layout
+
+# --- Scrolling ---
+bind -n C-S-Up copy-mode \; send -X scroll-up
+bind -n C-S-Down copy-mode \; send -X scroll-down
+bind -n C-S-PageUp copy-mode \; send -X page-up
+bind -n C-S-PageDown copy-mode \; send -X page-down
+bind -n C-S-Home copy-mode \; send -X history-top
+bind -n C-S-End copy-mode \; send -X history-bottom
+
+# Ctrl+Shift+h = show scrollback in pager (like kitty's show_scrollback)
+bind -n C-S-h capture-pane -pS - \; save-buffer /tmp/sethmux-scrollback.txt \; new-window "less +G /tmp/sethmux-scrollback.txt"
+
+# --- Clipboard ---
+# Ctrl+Shift+c = copy (enter copy mode, or copy selection if in copy mode)
+bind -n C-S-c copy-mode
+bind -T copy-mode-vi C-S-c send -X copy-selection-and-cancel
+
+# Ctrl+Shift+v = paste from tmux buffer
+bind -n C-S-v paste-buffer
+
+# --- Clear terminal ---
+# Ctrl+Shift+Delete = clear terminal + scrollback
+bind -n C-S-DC send-keys C-l \; clear-history
+
+# --- Fullscreen ---
+# F11 = toggle pane zoom (closest to kitty's fullscreen)
+bind -n F11 resize-pane -Z
+
+# ============================================================
+# Dvorak-friendly extras (prefix Ctrl-A)
+# ============================================================
+bind s split-window -v -c "#{pane_current_path}"
+bind v split-window -h -c "#{pane_current_path}"
+bind z resize-pane -Z
+bind c new-window -c "#{pane_current_path}"
+bind o select-pane -t :.+
+
+# --- Alt shortcuts (no prefix, kept for mobile/quick access) ---
 bind -n M-t new-window -c "#{pane_current_path}"
 bind -n M-w kill-window
 bind -n M-1 select-window -t 1
@@ -16,15 +95,10 @@ bind -n M-4 select-window -t 4
 bind -n M-5 select-window -t 5
 bind -n M-Left previous-window
 bind -n M-Right next-window
-bind c new-window -c "#{pane_current_path}"
 
-# --- Dvorak-friendly splits ---
-bind s split-window -v -c "#{pane_current_path}"
-bind v split-window -h -c "#{pane_current_path}"
-
-# --- Pane navigation ---
-bind o select-pane -t :.+
-bind z resize-pane -Z
+# ============================================================
+# AI CLI workflow features
+# ============================================================
 
 # --- Mouse ---
 set -g mouse on
@@ -39,16 +113,15 @@ 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 ---
-# Ctrl-A S = save entire scrollback to file
 bind S capture-pane -pS - \; save-buffer ~/logs/capture-#{session_name}-#{window_index}-#{pane_index}-#(date +%s).txt \; display "Pane captured to ~/logs/"
-
-# Ctrl-A L = toggle pipe-pane logging
 bind L pipe-pane -o "cat >> ~/logs/live-#{session_name}-#{window_index}-#(date +%s).log" \; display "Logging toggled"
 
 # --- Clipboard ---
 set -g set-clipboard on
-# Copy on select (mouse)
-bind -T copy-mode-vi MouseDragEnd1Pane send -X copy-pipe-and-cancel "cat"
+
+# ============================================================
+# Appearance
+# ============================================================
 
 # --- Numbering ---
 set -g base-index 1
@@ -75,8 +148,6 @@ setw -g window-status-separator ""
 # --- Pane borders ---
 set -g pane-border-style "fg=#333333"
 set -g pane-active-border-style "fg=#D35400"
-set -g pane-border-format " #{pane_current_command} "
-set -g pane-border-status off
 
 # --- Terminal ---
 set -g default-terminal "tmux-256color"