# 6.1 Integration Use Cases

* Games adopting PETs as companions or NPCs
* AR overlays that allow pets to appear in the physical environment
* Social apps enabling mood-sharing or ambient presence
* Productivity apps incorporating quiet, focus-friendly modes
* Virtual worlds that require persistent digital citizens

Each integration benefits from the identity layer’s deterministic guarantees. A pet will behave consistently in any world that adheres to the model interface.


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