- install_python_stack.py: an explicit cu* pin now clears the CUDA_VISIBLE_DEVICES
empty/-1 hide gate as well as the NVIDIA-presence gate, so
CVD=-1 UNSLOTH_TORCH_INDEX_FAMILY=cu128 studio update repairs to CUDA wheels
(parity with install.sh's get_torch_index_url override, which skips all GPU
probing). Unpinned CVD=-1 still skips.
- install_python_stack.py: _ensure_cpu_torch installs the bounded _CPU_TORCH_PKG_SPEC
instead of a bare torch/torchvision/torchaudio trio; the /cpu index now also
serves torch 2.11+, which is outside the supported <2.11 range.
- install.sh: the torch>=2.11 constraint case matches the index leaf (rocm7.2|gfx*)
instead of the whole URL, so a mirror base path containing a gfx/rocm7.2 segment
with a cu*/cpu family is not false-matched onto the 2.11 line.
- setup.ps1: the stale-venv check expects rocm torch only for arches the install
path maps to a repo.amd.com wheel index; an unmapped/unreadable arch installs
CPU, so a correct CPU venv is no longer marked stale.
- Tests for each of the above.
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