Designing Reconnect-Safe Event Streams for Remote Coding Agents
A remote coding-agent interface can show a green connection indicator and still be wrong.
The socket may be alive while the UI is missing messages. A permission card may still look pending after the tool has run. A phone may reconnect and replay an old assistant chunk over a newer terminal state. These failures feel like networking bugs, but most of them are really data-consistency bugs.
A Connected Socket Can Still Show an Incomplete Truth
A WebSocket answers one narrow question: can two endpoints exchange frames right now?
A remote agent client needs answers to harder questions:
- Which events exist for this session?
- Which of those events has this client already rendered?
- Which actions reached a terminal state?
- Did another client send a newer command?
- Can history be replayed without duplicating live output?
If the protocol cannot answer those questions, reconnecting the transport only reconnects the client to uncertainty.
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