docs: def cli():
      """An improved shell command, based on konch."""
      from flask.globals import _app_ctx_stack
  
      app = _app_ctx_stack.top.app
      options = {key: app.config.get(key, DEFAULTS[key]) for key in DEFAULTS.keys()}
      base_context = {"app": app}
      if options["KONCH_FLASK_IMPORTS"]:
          base_context.update(get_flask_imports())
  
      context = dict(base_context)
  
      if options["KONCH_FLASK_SHELL_CONTEXT"]:
          flask_context = app.make_shell_context()
          context.update(flask_context)
  
      context.update(options["KONCH_CONTEXT"])
  
      def context_formatter(ctx):
          formatted_base = ", ".join(sorted(base_context.keys()))
          ret = "\n{FLASK}\n{base_context}\n".format(
              FLASK=click.style("Flask:", bold=True), base_context=formatted_base
          )
          if options["KONCH_FLASK_SHELL_CONTEXT"]:
              variables = ", ".join(sorted(flask_context.keys()))
              ret += "\n{ADDITIONAL}\n{variables}\n".format(
                  ADDITIONAL=click.style(
                      "Flask shell context (see shell_context_processor()):", bold=True
                  ),
                  variables=variables,
              )
          if options["KONCH_CONTEXT"]:
              variables = ", ".join(sorted(options["KONCH_CONTEXT"].keys()))
              ret += "\n{ADDITIONAL}\n{variables}".format(
                  ADDITIONAL=click.style(
                      "Additional variables (see KONCH_CONTEXT):", bold=True
                  ),
                  variables=variables,
              )
          return ret
  
      context_format = options["KONCH_CONTEXT_FORMAT"] or context_formatter
      konch.start(
          context=context,
          shell=options["KONCH_SHELL"],
          banner=options["KONCH_BANNER"],
          prompt=options["KONCH_PROMPT"],
          output=options["KONCH_OUTPUT"],
          ptpy_vi_mode=options["KONCH_PTPY_VI_MODE"],
          context_format=context_format,
          ipy_extensions=options["KONCH_IPY_EXTENSIONS"],
          ipy_autoreload=options["KONCH_IPY_AUTORELOAD"],
          ipy_colors=options["KONCH_IPY_COLORS"],
          ipy_highlighting_style=options["KONCH_IPY_HIGHLIGHTING_STYLE"],
      )