Defining a simple entry-point group:

from __future__ import annotations

import click

from .sys_info import run as sys_info


@click.group()
def run() -> None:
    """Main package entry-point."""  # noqa: D401


run.add_command(sys_info)

And executing the corresponding command without an arguments shows the help message, e.g.

$ my_click_cmd
Usage: my_click_cmd [OPTIONS] COMMAND [ARGS]...

  Main package entry-point.

Options:
  --help  Show this message and exit.

Commands:
  sys-info  Run sys_info() command.

But now returns exit code 2 instead of 0 as in click<8.2.0. $ my_click_cmd --help, providing explicitly the --help option returns the same message with exit code 0.

Is this an intended backward incompatible change (undocumented in the changelog), or an introduced bug?