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Picture a developer pair-programming with an AI assistant. The model returns a function that almost works. The developer asks it to try again. The second attempt is worse. They want the first one back. In a linear chat, that history is gone, or it's a third bubble in the thread that pollutes context for every future turn.

Take any AI agent demo from the last six months. It works. Now ship it to real users on real networks, real devices, real attention spans. A meaningful share of those users will never finish their first conversation cleanly. Not because the model gave a bad answer. Because the connection dropped, the tab refreshed, the phone took over from the laptop, or the spinner kept spinning forever.

At Ably we recently shipped AI Transport, our drop-in transport layer for streaming LLM output over Ably channels, with all the resumability, multi-device continuity, and handover guarantees that implies.