New Terminal Output:

root@8beb00c26e2f:/app# /usr/local/bin/python3.13t -c "import sys; print([x for x in sys.builtin_module_names if 'interp' in x.lower()])"
[]
root@8beb00c26e2f:/app# /usr/local/bin/python3.13t -c "import _xxsubinterpreters as interp; print(dir(interp))"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
    import _xxsubinterpreters as interp; print(dir(interp))
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ModuleNotFoundError: No module named '_xxsubinterpreters'
root@8beb00c26e2f:/app# /usr/local/bin/python3.13t -c "
> import sys
> import _xxsubinterpreters as interp
>
> # Test subinterpreter compatibility
> try:
>     interp_id = interp.create()
>     print(f'Created subinterpreter {interp_id}')
>     interp.exec(interp_id, 'import nogil_ext; print(\"nogil_ext imported in subinterpreter\")')
>     print('Subinterpreter test passed')
> except Exception as e:
>     print(f'Subinterpreter error: {e}')
> "
Traceback (most recent call last):
  File "<string>", line 3, in <module>
    import _xxsubinterpreters as interp
ModuleNotFoundError: No module named '_xxsubinterpreters'
root@8beb00c26e2f:/app#
