Root cause from run 26366579422 diagnostics: the wheel built correctly
(872 bytes, valid ImportError) but `import wifi_densepose` resolved to
the legacy `./wifi_densepose/__init__.py` left in the repo root from
v1, NOT to the freshly-installed tombstone wheel in the smoke venv.
Python places the cwd at sys.path[0] for `python -c "..."`, so
running the import from the repo root made the legacy directory win
over site-packages every time. The "isolated venv" was not the
problem — the cwd was.
Fix: copy the wheel to /tmp, cd /tmp before the import. Now the
smoke test runs in a directory that contains no `wifi_densepose/`
so the only resolution path is the venv's site-packages.
The repo-root `./wifi_densepose/__init__.py` is a separate concern
(legacy v1 carry-over) that should be cleaned up in a follow-up
commit, but the smoke test should not depend on it being absent.
Co-Authored-By: claude-flow <ruv@ruv.net>
bd91cd1e8a