The builder's imported modules could mark an empty dependency tree as
installed. Probe every anchor in one isolated target process. Require
all anchors for a multi-module extra, and process only the selected
tree's .pth files so editable packages retain their launch behavior.
The native builder passes its staged Python explicitly and stops before
manifest publication when the inventory fails. Correct the Hindsight
and Teams anchors using the namespaces in their locked wheels.
Verified: 31 tests passed, 3 host skips. A real target child records its
identity, and a caller mutation back to the builder Python fails the
regression. Both downloaded SDK wheels match uv.lock and pass inventory
and availability checks. Ruff and added-comment checks passed.
No full native package or signing run is claimed.
Apple rejects unsigned native code inside cached wheel ZIPs. The macOS
signer can reach the extracted copies, but not the copies inside ZIPs.
Keep the extracted cache and omit compressed wheels from its sdist bucket.
The build machine retains its original cache. uv installs from the extracted
entries, so offline environment rebuilds do not need the compressed copies.
The native regression builds a real source package with uv. Its offline
install succeeds after the server stops and the source files are deleted.
Focused tests report 11 passed and 3 platform skips. A real pilk native
extension also installs and imports from the pruned cache. Apple acceptance
remains pending on the next release run.
