Backpack Runtime v0.2.0-alpha.9

This prerelease fixes Claude App relaunch and current Windows MSIX discovery.

Install or update

backpack update --prerelease

Accepts normal Claude-owned additions such as preferences and Cowork paths in
the shared third-party-mode configuration while continuing to reject changes
to Backpack-owned security and routing fields.
Preserves Claude-owned additions during reconfiguration and restore instead
of replacing the entire shared configuration file.
Opens current Windows MSIX installations through Claude's registered
claude:// protocol when no traditional executable path exists.
Allows rerunning backpack launch claude-app to ensure the persistent local
daemon is available again after a reboot or daemon restart.

Claude App routing remains experimental. The authenticated provider profile and
its loopback token retain strict drift protection.