Start a new git worktree in tmux

claude-start

#!/usr/bin/env bash

set -euo pipefail

issue=$1

~/.claude/local/claude \
  "Start working on issue #$issue
- Keep an open mind. Feel free to reconsider the proposed approach
- Use context7 for updated docs
- Don't go out of your way to keep everything backwards compatible. Rather investigate if we can change things once and for all
- Update the issue as you discover new relevant information, make progress or decisions
- After you're done, read through your changes and see if there are things that can be simplified and remove any unused code or obsolete code paths
- Finally, make a PR with your changes. If one exists for this issue, update it. Include progress made" \
  --allowedTools "Edit" "Write" "Read" \
  "Bash(gh:*)" "Bash(rg:*)" "Bash(find:*)" "Bash(ls:*)" "Bash(grep:*)" "context7:*" \
  "Bash(bin/format:*)" "Bash(bin/check:*)" \
  "Bash(bin/rails:*)" \
  "Bash(git:*)"

gwt

#!/usr/bin/env bash
# gwt — “git worktree in tmux”
#  ▸ gwt NAME          → create/reuse worktrees/NAME
#  ▸ gwt               → pick an existing work-tree with fzf

set -euo pipefail

################################################################################
# 0 · ensure we’re inside a Git repo and move to its root
################################################################################
root=$(git -C . rev-parse --show-toplevel 2>/dev/null) || {
  echo "gwt: not inside a Git repository" >&2
  exit 1
}
cd "$root"
mkdir -p worktrees/ # folder that holds our work-trees

################################################################################
# 1 · pick/create the work-tree
################################################################################
if [[ $# -eq 0 ]]; then
  # interactive *pick* via fzf
  command -v fzf >/dev/null 2>&1 || {
    echo "gwt: fzf not found (needed for interactive selection)" >&2
    exit 1
  }

  # list all work-tree paths (absolute) and feed them to fzf
  wtdir=$(git worktree list --porcelain |
    awk '/^worktree / {print $2}' |
    fzf --prompt='Worktree ❯ ' --exit-0)

  [[ -n ${wtdir:-} ]] || exit 0 # user pressed <Esc>
  name=$(basename "$wtdir")     # eg. worktrees/feature → feature
else
  # create/reuse worktrees/NAME
  name=$1
  wtdir="$root/worktrees/$name"
fi

window="$name"      # tmux window name
session="worktrees" # tmux session that herds all work-trees

################################################################################
# 2 · figure out the repo’s default branch for *new* work-trees
################################################################################
if git branch --format='%(refname:short)' | grep -q '^master$'; then
  main_branch=master
else
  main_branch=main
fi

################################################################################
# 3 · one shared snippet we’ll send to tmux
################################################################################
setup_worktree=$(
  cat <<EOF
cd "$root"
if [ -d "$wtdir/.git" ]; then
  cd "$wtdir"
else
  git worktree add -b "$name" "$wtdir" $main_branch
  cd "$wtdir"
fi
exec \$SHELL
EOF
)

################################################################################
# 4 · inside-tmux vs. outside-tmux workflow
################################################################################
if [[ -n ${TMUX:-} ]]; then
  tmux rename-window "$window"
  tmux send-keys "$setup_worktree" C-m
  exit 0
fi

tmux new-session -Ad -s "$session" -n "$window"

if tmux list-windows -t "$session" -F '#{window_name}' | grep -Fxq "$window"; then
  tmux select-window -t "$session:$window"
else
  tmux new-window -t "$session" -n "$window"
fi

tmux send-keys -t "$session:$window" "$setup_worktree" C-m
tmux attach -t "$session:$window"