Players can now host and join over the internet without port-forwarding
via Unity Gaming Services Relay + Lobby, exposed through the unified
Multiplayer Services SDK (Sessions API).
- OnlineSessionManager: anonymous auth, CreateSessionAsync (public,
relay-backed), QuerySessionsAsync server browser, JoinSessionByIdAsync,
and session leave wired into the existing net-stop teardown.
- Per-install auth profile derived from the project path
(mirror_<sha1(dataPath)>) so junction-mirror clones get distinct UGS
player ids, avoiding the same-machine 409 LobbyConflict on join.
- Install com.unity.services.multiplayer 2.2.4 (pulls Relay/Lobby/
Authentication/Core) and attach OnlineSessionManager to the
NetworkManager in Main.
Loopback dev flow (NetworkBootstrap H/C/J/K) is left untouched; the
online path is additive. MatchManager and gameplay are unchanged since
Sessions starts the host/client through NGO as before.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
