specs-sync-kit

Install Spectacles Sync Kit from the Asset Library, drag the SpectaclesInteractionKit and SpectaclesSyncKit prefabs into the scene, and place synced content under Colocated World / EnableOnReady. Use SyncEntity with StorageProperty for shared state and Instantiator for networked prefab spawning.

Add the Inspector-configured SyncTransform component with Position and Rotation set to Location for colocated content. For selective axes or conditional sync, use StorageProperty.forPosition and forRotation with PropertyType.Location on a SyncEntity instead.

Use syncEntity.doIOwnStore() on a claimOwnership:true entity for per-entity write authority, which covers most game-state writes. Use SessionController.isHost() === true only for session-wide authority or early initialization before any SyncEntity exists.

The notifyOnReady timing differs between modes: START_MENU fires per-pane when each user taps Multiplayer, so event handlers wired in onAwake can miss firings that already happened on a peer. Pair every subscription with a per-frame retry in UpdateEvent for authority transitions.

sendEvent does not replay history, so late joiners miss earlier presence broadcasts. Implement a re-announce handshake where each pane re-broadcasts its connectionId when it hears a new peer, or read initial state via getUsers() and readAll on the RealtimeStore.

Networked event payloads must be JSON-serializable and are limited to 100 KB per message and 350 messages per 5-second window per session. Use StorageProperty for persistent state that joiners must see, reserving events for one-shot signals.