my tmux settup script

tmux_setup.sh

#!/usr/bin/env bash
set -euo pipefail

# Usage:
#   scripts/tmux_llm_layout.sh
#   scripts/tmux_llm_layout.sh --llm codex
#   scripts/tmux_llm_layout.sh --new-session [session_name]
#   scripts/tmux_llm_layout.sh --new-session [session_name] --llm codex
#
# Env overrides:
#   LLM_CMD=codex scripts/tmux_llm_layout.sh
#   FILES_CMD='yazi .' LLM_CMD='claude' GIT_CMD='lazygit' scripts/tmux_llm_layout.sh

SESSION_NAME="dev"
FILES_CMD="${FILES_CMD:-yazi .}"
LLM_CMD="${LLM_CMD:-claude}"
GIT_CMD="${GIT_CMD:-lazygit}"
NEW_SESSION=false

while [[ $# -gt 0 ]]; do
  case "$1" in
    --new-session)
      NEW_SESSION=true
      if [[ -n "${2:-}" && "${2:0:1}" != "-" ]]; then
        SESSION_NAME="$2"
        shift
      fi
      ;;
    --llm)
      if [[ -z "${2:-}" || "${2:0:1}" == "-" ]]; then
        echo "エラー: --llm にはコマンド名を指定してください。"
        exit 1
      fi
      LLM_CMD="$2"
      shift
      ;;
    *)
      echo "不明な引数: $1"
      echo "Usage: scripts/tmux_llm_layout.sh [--new-session [session_name]] [--llm <command>]"
      exit 1
      ;;
  esac
  shift
done

setup_layout() {
  local target_window="$1"
  local files_pane
  local llm_pane
  local git_pane

  # Use pane IDs instead of numeric indexes to work with any pane-base-index.
  files_pane="$(tmux display-message -p -t "$target_window" '#{pane_id}')"
  llm_pane="$(tmux split-window -h -P -F '#{pane_id}' -t "$files_pane")"
  git_pane="$(tmux split-window -v -P -F '#{pane_id}' -t "$llm_pane")"

  # Resize according to requested values
  tmux resize-pane -t "$llm_pane" -D 5
  tmux resize-pane -t "$files_pane" -R 10

  # Add pane labels
  tmux set-option -t "$target_window" pane-border-status top
  tmux set-option -t "$target_window" pane-border-format ' #{pane_title} '
  tmux select-pane -t "$files_pane" -T files
  tmux select-pane -t "$llm_pane" -T llm
  tmux select-pane -t "$git_pane" -T git

  # Launch tools
  tmux send-keys -t "$files_pane" "$FILES_CMD" C-m
  tmux send-keys -t "$llm_pane" "$LLM_CMD" C-m
  tmux send-keys -t "$git_pane" "$GIT_CMD" C-m
}

if [[ "$NEW_SESSION" == "true" ]]; then
  if ! tmux has-session -t "$SESSION_NAME" 2>/dev/null; then
    new_window=""
    tmux -2 new-session -d -s "$SESSION_NAME"
    new_window="$(tmux display-message -p -t "${SESSION_NAME}:" '#S:#I')"
    setup_layout "$new_window"
  fi

  if [[ -t 1 ]]; then
    tmux attach -t "$SESSION_NAME"
  else
    echo "session '${SESSION_NAME}' を作成/再利用しました（非TTYのためattachはスキップ）。"
  fi
  exit 0
fi

if [[ -z "${TMUX:-}" ]]; then
  echo "tmux内で実行してください。"
  echo "新規起動込みで行う場合: scripts/tmux_llm_layout.sh --new-session [session_name]"
  exit 1
fi

CURRENT_WINDOW="$(tmux display-message -p '#S:#I')"
setup_layout "$CURRENT_WINDOW"