Add <prefix>A binding to display-popup with agent.sh

Enables the use of AI agents (claude, gemini) in a persistent
display-popup, backed by a tmux session, via the <prefix>A binding.

agent-cmd.sh

@@ -1,59 +0,0 @@
-#!/usr/bin/env bash
-# Detect available agents, prompt with fzf, run the selected one.
-# Detaches the client if all panes in the window are dead afterwards.
-
-agents=()
-command -v claude &>/dev/null && agents+=(claude)
-command -v opencode &>/dev/null && agents+=(opencode)
-command -v gemini &>/dev/null && agents+=(gemini)
-command -v codex &>/dev/null && agents+=(codex)
-
-if [ ${#agents[@]} -eq 0 ]; then
-  echo "No agent commands found (claude, opencode, gemini)"
-  exit 1
-fi
-
-# Minimize fzf prompt size while centering it.
-width=24
-height=$((${#agents[@]} + 6))
-hmargin=$((($(tput cols) - width) / 2))
-vpad=$((($(tput lines) - height) / 2))
-[ $hmargin -lt 0 ] && hmargin=0
-[ $vpad -lt 0 ] && vpad=0
-tput cup "$vpad" 0
-
-agent=$(printf '%s\n' "${agents[@]}" | fzf \
-  --prompt='agent> ' \
-  --reverse \
-  --border=rounded \
-  --height="$height" \
-  --margin="0,$hmargin" \
-  --padding=1)
-
-# Reset cursor so the agent doesn't render starting where fzf left it.
-tput cup 0 0
-tput ed
-
-if [ -n "$agent" ]; then
-  "$agent" || true
-fi
-
-# 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

agent.sh

@@ -2,8 +2,6 @@
 
 set -e
 
-script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-
 # Use the current directory (set via display-popup -d)
 dir="${PWD:-$HOME}"
 # Use the directory basename as window name
@@ -11,16 +9,15 @@ window_name=$dir
 
 # Create the agent session if it doesn't exist
 if ! tmux has-session -t agent; then
-  tmux new-session -ds agent -c "$dir" -n "$window_name" "$script_dir/agent-cmd.sh"
+  tmux new-session -ds agent -c "$dir" -n "$window_name" claude
+  tmux split-window -h -t agent:0 gemini
   # Store the directory in a window option for later matching
   tmux set-window-option -t agent @agent_dir "$dir"
+  tmux set-option -t agent status off
+  tmux attach-session -t agent
+  exit 0
 fi
 
-# Apply session options on every invocation so updates propagate to live sessions
-tmux set-option -t agent status off
-tmux set-option -t agent remain-on-exit on
-tmux set-option -t agent default-command "$script_dir/agent-cmd.sh"
-
 # Search for an existing window with matching directory
 target_window=""
 for window_id in $(tmux list-windows -t agent -F '#{window_id}'); do
@@ -35,8 +32,11 @@ if [ -n "$target_window" ]; then
   # Select the existing window
   tmux select-window -t "$target_window"
 else
-  # Create a new window; default-command runs agent-cmd.sh
-  tmux new-window -t agent -c "$dir" -n "$window_name"
+  # Create a new window with agents
+  tmux new-window -t agent -c "$dir" -n "$window_name" claude
+  tmux split-window -h agent gemini
+  # Create a split with gemini
+  tmux split -h -t agent -c "$dir" gemini
   # Store the directory in a window option for later matching
   tmux set-window-option -t agent @agent_dir "$dir"
 fi

check-version.sh

@@ -1,29 +1,13 @@
 #!/usr/bin/env bash
 
-# Compare the current tmux version against one or more version constraints.
-#
-# Each constraint pairs an operator and version in a single argument,
-# e.g. ">= 3.2". Multiple constraints can be joined with the logical operators
-# `and` / `or`, where `and` binds tighter than `or` (standard precedence). This
-# allows a single invocation to express a range without spawning the script
-# multiple times.
-#
-# Exit: 0 if the whole expression is true, 1 if false
-#
-# Examples:
-#   check-version.sh ">= 3.2"
-#   check-version.sh ">= 3.2" and "< 3.3"
-#   check-version.sh "< 2.9" or ">= 3.4"
+# Compare the current tmux version against a given version.
+# Exit: 0 if comparison is true, 1 if false
 
 set -euo pipefail
 
 usage() {
-  cat >&2 <<'EOF'
-usage: check-version.sh <constraint> [and|or <constraint> ...]
-  constraint: <operator> <version>, e.g. ">= 3.2"
-  operators:  < <= == >= >
-  logical:    and or  (and binds tighter than or)
-EOF
+  echo "usage: $0 <operator> <version>" >&2
+  echo "operators: < <= == >= >" >&2
 }
 
 if [[ ${1:-} == "-h" || ${1:-} == "--help" ]]; then
@@ -31,11 +15,14 @@ if [[ ${1:-} == "-h" || ${1:-} == "--help" ]]; then
   exit 0
 fi
 
-if [[ $# -eq 0 ]]; then
+if [[ $# -ne 2 ]]; then
   usage
   exit 1
 fi
 
+operator="$1"
+target_version="$2"
+
 # Extract tmux version (e.g., "tmux 3.3a" -> "3.3a")
 current_version=$(tmux -V | sed 's/^tmux //')
 
@@ -88,78 +75,22 @@ compare_versions() {
   echo 0
 }
 
-# Evaluate a single constraint (e.g. ">= 3.2") against the current version.
-# Returns 0 (true) or 1 (false); exits on a malformed constraint.
-eval_constraint() {
-  local constraint="$1"
-  local operator version
-  read -r operator version <<< "$constraint"
+result=$(compare_versions "$current_version" "$target_version")
 
-  if [[ -z "$operator" || -z "$version" ]]; then
-    echo "error: invalid constraint: '$constraint' (expected '<operator> <version>', e.g. '>= 3.2')" >&2
+case "$operator" in
+  '<')
+    [[ "$result" -eq -1 ]] && exit 0 || exit 1 ;;
+  '<=')
+    [[ "$result" -le 0 ]] && exit 0 || exit 1 ;;
+  '==')
+    [[ "$result" -eq 0 ]] && exit 0 || exit 1 ;;
+  '>=')
+    [[ "$result" -ge 0 ]] && exit 0 || exit 1 ;;
+  '>')
+    [[ "$result" -eq 1 ]] && exit 0 || exit 1 ;;
+  *)
+    echo "error: invalid operator: $operator" >&2
     usage
     exit 1
-  fi
-
-  local result
-  result=$(compare_versions "$current_version" "$version")
-
-  case "$operator" in
-    '<')  [[ "$result" -eq -1 ]] ;;
-    '<=') [[ "$result" -le 0 ]] ;;
-    '==') [[ "$result" -eq 0 ]] ;;
-    '>=') [[ "$result" -ge 0 ]] ;;
-    '>')  [[ "$result" -eq 1 ]] ;;
-    *)
-      echo "error: invalid operator: '$operator'" >&2
-      usage
-      exit 1 ;;
-  esac
-}
-
-# Walk the alternating constraint/logical sequence, accumulating each `and`
-# group (1 = true) and folding completed groups into the `or` result. Truth
-# values are tracked as ints and converted to an exit code at the end.
-or_result=0
-and_result=1
-expect=constraint
-
-for token in "$@"; do
-  if [[ "$expect" == "constraint" ]]; then
-    case "$token" in
-      and | or)
-        echo "error: expected a constraint, got logical operator: $token" >&2
-        usage
-        exit 1 ;;
-    esac
-    if eval_constraint "$token"; then
-      and_result=$(( and_result & 1 ))
-    else
-      and_result=$(( and_result & 0 ))
-    fi
-    expect=logical
-  else
-    case "$token" in
-      and)
-        ;;
-      or)
-        or_result=$(( or_result | and_result ))
-        and_result=1 ;;
-      *)
-        echo "error: expected 'and' or 'or', got: $token" >&2
-        usage
-        exit 1 ;;
-    esac
-    expect=constraint
-  fi
-done
-
-if [[ "$expect" == "constraint" ]]; then
-  echo "error: expression ends with a logical operator" >&2
-  usage
-  exit 1
-fi
-
-or_result=$(( or_result | and_result ))
-
-[[ "$or_result" -eq 1 ]] && exit 0 || exit 1
+    ;;
+esac

project.sh

@@ -2,90 +2,19 @@
 
 set -e
 
-projects_dir=$HOME/Projects
+projects=()
 
-# Print the sorted, de-duplicated list of selectable projects.
-list_projects() {
-  local projects=() dir relative line
-
-  # All depth-2 directories without @ are included unconditionally
-  for dir in "$projects_dir"/*/*/; do
-    [ -d "$dir" ] || continue
-    relative="${dir#$projects_dir/}"
-    relative="${relative%/}"
-    [[ "$relative" != *@* ]] && projects+=("$relative")
-  done
-
-  # For @ directories, only include those with .git
-  if command -v fd &>/dev/null; then
-    while IFS= read -r line; do
-      projects+=("$line")
-    done < <(fd -H '^\.git$' "$projects_dir" |
-      grep '@' |
-      sed -E -e "s|^$projects_dir/||" -e 's|/\.git/?$||')
-  else
-    while IFS= read -r line; do
-      projects+=("$line")
-    done < <(find "$projects_dir" \( -name 'node_modules' -o -name '.git' \) \
-      -prune -name '.git' -print |
-      grep '@' |
-      sed -E -e "s|^$projects_dir/||" -e 's|/\.git/?$||')
+# Get list of projects from ~/Projects
+for dir in $HOME/Projects/**/*; do
+  if [ -d $dir ]; then
+    projects+=(${dir#$HOME/Projects/})
   fi
+done
 
-  printf '%s\n' "${projects[@]}" | sort -u
-}
+project=$(
+  echo "${projects[@]}" | tr ' ' '\n' | sort -u |
+  fzf --layout=reverse --info=hidden --border=rounded --cycle
+)
 
-# Second pass: runs inside the popup. Read the list the first pass already
-# built (so the directory scan only happens once) and open the selection.
-if [[ "${1:-}" == --pick ]]; then
-  listfile=$2
-  trap 'rm -f "$listfile"' EXIT
-
-  # Cancelling fzf (Esc/^C) exits non-zero; treat it as "no selection" and
-  # leave quietly, rather than letting the status propagate out of the popup
-  # and print '...project.sh returned 130' in the parent pane.
-  project=$(
-    fzf --layout=reverse --info=hidden --border=rounded --cycle < "$listfile"
-  ) || exit 0
-  [ -n "$project" ] || exit 0
-
-  tmux new-window -n "$project" -c "$projects_dir/$project"
-  ~/.local/share/tmux/layouts/window-auto
-  exit
-fi
-
-# First pass: scan once, size a popup to fit the longest project name, then
-# re-launch ourselves inside it. fzf has no width of its own — it fills the
-# popup — so the popup width is what we scale.
-listfile=$(mktemp)
-list_projects > "$listfile"
-
-longest=0
-while IFS= read -r line; do
-  if (( ${#line} > longest )); then
-    longest=${#line}
-  fi
-done < "$listfile"
-
-# We're launched from run-shell, which owns no client, so resolve the client
-# that triggered us. It both anchors the popup (-c, without which the popup
-# gets no tty and fzf can't draw) and gives the terminal width for the cap.
-client=$(tmux display -p '#{client_name}')
-cols=$(tmux display -p -c "$client" '#{client_width}')
-
-# Clamp between the original fixed width and 90% of the terminal. In between,
-# pad for fzf's chrome: rounded border (2) + pointer gutter (2) + scrollbar (1)
-# + a column of breathing room.
-min=60
-max=$(( cols * 90 / 100 ))
-width=$(( longest + 6 ))
-(( width < min )) && width=$min
-(( width > max )) && width=$max
-
-flags=(-c "$client" -w "$width" -h 10)
-# Match the borderless popup the keybinding used on tmux >= 3.3.
-if ~/.config/tmux/check-version.sh ">= 3.3"; then
-  flags+=(-B)
-fi
-
-tmux display-popup "${flags[@]}" -E "'$0' --pick '$listfile'"
+tmux new-window -n $project -c ~/Projects/$project
+~/.local/share/tmux/layouts/window-auto

tmux.conf

@@ -28,13 +28,10 @@ set -g status-interval 2
 set -g default-terminal "tmux-256color"
 
 # Enable true-color
-if '~/.config/tmux/check-version.sh "< 3.2"' \
+if '~/.config/tmux/check-version.sh "<" 3.2' \
   'set-option -as terminal-features ",xterm*:Tc"' \
   'set-option -as terminal-features ",xterm*:RGB"'
 
-# Declare clipboard (OSC-52) support so tmux emits it for copy-pipe.
-set -as terminal-features ',xterm*:clipboard'
-
 # Focus events enabled for terminals that support them
 set -g focus-events on
 
@@ -52,7 +49,7 @@ unbind -T copy-mode-vi MouseDragEnd1Pane
 # Enable changing cursor shape per pane, vim or zsh should emit escape
 # sequences to change cursor shape.
 # iTerm2 only requires this before tmux 2.9
-if '[ -n $ITERM_PROFILE ] && ~/.config/tmux/check-version.sh "< 2.9"' \
+if '[ -n $ITERM_PROFILE ] && ~/.config/tmux/check-version.sh "<" 2.9' \
   'set -ga terminal-overrides "*:Ss=\E]1337;CursorShape=%p1%d\7"'
 # VTE compatible terminals.
 if '[ ! -n $ITERM_PROFILE ]' \
@@ -61,29 +58,29 @@ if '[ ! -n $ITERM_PROFILE ]' \
 # Enable strikethrough on VTE compatible terminals.
 set -ga terminal-overrides 'xterm*:smxx=\E[9m'
 
-if -b '~/.config/tmux/check-version.sh ">= 3.2" and "< 3.3"' {
-  bind A if -F '#{==:#{session_name},agent}' { detach-client } {
-    display-popup -d '#{pane_current_path}' -w 50% -h 90% -E ~/.config/tmux/agent.sh
-  }
-  bind H display-popup -w 75% -h 75% -E htop
-  bind I display-popup -d '#{pane_current_path}' -E ~/.config/tmux/interpreter.sh
-  bind N display-popup -d '#{pane_current_path}' -w 60% -h 75% -E nvim
-  bind S display-popup -w 60 -h 10 -E ~/.config/tmux/session.sh
+# Binding to create window-auto layout
+bind a run-shell ~/.local/share/tmux/layouts/window-auto
+# TODO: bind A run-shell ~/.local/share/tmux/layouts/window-auto --refresh
+
+# Set only on macOS where it's required
+if -b '[ "`uname`" = "Darwin" ]' \
+  'set -g default-command "reattach-to-user-namespace -l $SHELL"'
+
+if -b '~/.config/tmux/check-version.sh ">=" 3.2 && ~/.config/tmux/check-version.sh "<" 3.3' {
+  bind A display-popup -d '#{pane_current_path}' -w 75% -h 90% -E ~/.config/tmux/agent.sh
+  bind I display-popup -d '#{pane_current_path}' -E '$SHELL -i ~/.config/tmux/interpreter.sh'
+  bind P display-popup -w 60 -h 10 -E '~/.config/tmux/project.sh'
+  bind S display-popup -w 60 -h 10 -E '~/.config/tmux/session.sh'
   bind T display-popup -d '#{pane_current_path}' -E $SHELL
 }
-if -b '~/.config/tmux/check-version.sh ">= 3.3"' {
-  bind A if -F '#{==:#{session_name},agent}' { detach-client } {
-    display-popup -S fg=#54546D -b rounded -d '#{pane_current_path}' -w 75% -h 90% -E ~/.config/tmux/agent.sh
-  }
-  bind H display-popup -S fg=#54546D -b rounded -w 50% -h 75% -E htop
-  bind I display-popup -S fg=#54546D -b rounded -d '#{pane_current_path}' -E ~/.config/tmux/interpreter.sh
-  bind N display-popup -S fg=#54546D -b rounded -d '#{pane_current_path}' -w 60% -h 75% -E nvim
-  bind S display-popup -B -w 60 -h 10 -E ~/.config/tmux/session.sh
+if -b '~/.config/tmux/check-version.sh ">=" 3.3' {
+  bind A display-popup -S fg=#54546D -b rounded -d '#{pane_current_path}' -w 75% -h 90% -E ~/.config/tmux/agent.sh
+  bind I display-popup -S fg=#54546D -b rounded -d '#{pane_current_path}' -E '$SHELL -i ~/.config/tmux/interpreter.sh'
+  bind P display-popup -B -w 60 -h 10 -E '~/.config/tmux/project.sh'
+  bind S display-popup -B -w 60 -h 10 -E '~/.config/tmux/session.sh'
   bind T display-popup -S fg=#54546D -d '#{pane_current_path}' -E $SHELL
 }
 
-bind P run-shell ~/.config/tmux/project.sh
-
 # Restore old next/previous window bindings
 bind C-n next-window
 bind C-p previous-window
@@ -159,13 +156,12 @@ if -b '[ "$SSH_TTY" != "" ]' \
   'set-option -g set-clipboard on'
 
 # Yank to the system clipboard in copy mode.
+# TODO: reattach-to-user-namespace not necessary with tmux > 2.6
 if -b '[ "`uname`" = "Darwin" ]' \
-  'bind -T copy-mode-vi y send-keys -X copy-pipe "pbcopy"'
+  'bind -T copy-mode-vi y send-keys -X copy-pipe "reattach-to-user-namespace pbcopy"'
 # When not in WSL2 use xsel, when in WSL use win32yank.exe to avoid UI lockups.
-if -b '[ "`uname`" != "Darwin" ]' {
-  if -b '[ "$WSLENV" = "" ]' \
-    'bind -T copy-mode-vi y send-keys -X copy-pipe "xsel -i --clipboard"' \
-    'bind -T copy-mode-vi y send-keys -X copy-pipe "win32yank.exe -i -crlf"'
-}
+if -b '[ "$WSLENV" = "" ]' \
+  'bind -T copy-mode-vi y send-keys -X copy-pipe "xsel -i --clipboard"' \
+  'bind -T copy-mode-vi y send-keys -X copy-pipe "win32yank.exe -i -crlf"'
 
 source-file ~/.config/tmux/theme.tmux