Git Directory Synchronizer

git-syncr

#!/bin/bash
help() { cat<<HELP
git-syncr - git worktree synchronizer

Usage: git syncr <command>

COMMANDS:

create <path> [<branch>]
                Create new worktree at <path> forked from current directory.
                Set branch name same as basename of path, if not provided.
                Stores information about the parent branch in config.
remove <path>
                Removes the worktree at <path> and the corresponding branch.
sync [<path>]
                Synchronizes repo in path bi-directionally with its parent.
                Uses current directory, if none given.
list            Alias for "git worktree list"
help            This help.


SUGGESTED ALIAS:

git config --global alias.sync 'syncr sync'

HELP
}

set -euo pipefail

pwd="$(pwd)"
thisdir="$(cd "$(dirname "$0")" || exit; pwd)"
this="${thisdir}/$(basename "$0")"

die() {
  echo "$*  [${BASH_LINENO[0]}]" >&2
  exit 1
}

_checkchild() {
  path="$1"
  branch="$(git -C "$path" rev-parse --abbrev-ref HEAD)"
  git -C "$path" config --get "branch.${branch}.parent-branch" > /dev/null || \
    die "Not a child sync directory. [${BASH_LINENO[1]}]"
}

# Create new worktree
create() {
  path="${1}"
  path="$(readlink -f "$path")"
  branch="${2:-$(basename "$path")}"
  parent_path="$pwd"
  parent_branch="$(git rev-parse --abbrev-ref HEAD)"

  # Create worktree
  git worktree add "$path" -b "$branch"
  git config "branch.${branch}.parent-branch" "$parent_branch"
  git config "branch.${branch}.parent-path" "$parent_path"
  git config "branch.${branch}.path" "$path"

  _checkchild "$path"
}

# Remove worktree
remove() {
  path="${1}"
  branch="$(git -C "$path" rev-parse --abbrev-ref HEAD)"
  parent_branch="$(git -C "$path" config --get "branch.${branch}.parent-branch")"
  parent_path="$(  git -C "$path" config --get "branch.${branch}.parent-path")"

  _checkchild "$path"

  # Remove tree
  git -C "$parent_path" worktree remove "$path"
  git -C "$parent_path" branch -D "$branch"
}

list() {
  git worktree list "$@"
}

sync() {
  path="${1:-$pwd}"
  path="$(readlink -f "$path")"
  branch="$(git -C "$path" rev-parse --abbrev-ref HEAD)"

  parent_branch="$(git -C "$path" config --get "branch.${branch}.parent-branch")"
  parent_path="$(  git -C "$path" config --get "branch.${branch}.parent-path")"

  _checkchild "$path"

  # Get latest changes from parent
  git -C "$path" rebase "${parent_branch}"
  # Push changes to parent
  git -C "$parent_path" merge "${branch}" --ff
}

main() {
  if [[ "$#" == "0" ]]; then
    help
    exit 0
  fi

  "$@"
}

main "$@"

Can you explain a little bit more about how to use this?
Especially in aider?
Thanks!