Unsigned preview packages
These macOS, Windows, and Linux packages are unsigned. macOS
Gatekeeper, Windows SmartScreen, or Linux desktop security may warn
before first launch. Verify downloads against SHA256SUMS.txt.
The latest.json manifest and per-platform .sig files are the
signed candidate updater set. They ship with the Release but are
not promoted to the stable endpoint until the protected manual
workflow publishes them.