I was curious so I had a look at how the "pip install ast-grep-cli" command works. It downloads a wheel for the correct platform from https://pypi.org/project/ast-grep-cli/#files

The wheel just contains the two binaries (sg and ast-grep) and no Python code:

    $ unzip -l ast_grep_cli-0.14.2-py3-none-macosx_10_7_x86_64.whl
    Archive:  ast_grep_cli-0.14.2-py3-none-macosx_10_7_x86_64.whl
      Length      Date    Time    Name
    ---------  ---------- -----   ----
        6207  12-03-2023 07:34   ast_grep_cli-0.14.2.dist-info/METADATA
          102  12-03-2023 07:34   ast_grep_cli-0.14.2.dist-info/WHEEL
        1077  12-03-2023 07:34   ast_grep_cli-0.14.2.dist-info/license_files/LICENSE
        1077  12-03-2023 07:34   ast_grep_cli-0.14.2.dist-info/license_files/LICENSE
    32865880  12-03-2023 07:34   ast_grep_cli-0.14.2.data/scripts/sg
    32865880  12-03-2023 07:34   ast_grep_cli-0.14.2.data/scripts/ast-grep
          639  12-03-2023 07:34   ast_grep_cli-0.14.2.dist-info/RECORD
    ---------                     -------
    65740862                     7 files

I haven't seen pip and wheels used to distribute a purely binary tool like this before.