Instance Chat System
A persistent messaging layer for durable, searchable handoffs between independent working sessions.
Independent working sessions do not share one continuous conversation, and either side may be offline when a handoff is written.
Channel history is retained behind a persistent messaging boundary and retrieved on demand. This separates shared context from the lifetime of any one terminal or browser.
Read position is maintained independently for each participant, so one reader's activity does not clear another's unread state. Searchable history supports later retrieval without requiring both sides to be connected at once.
When a client returns after a disconnect, it can reopen retained history and reconcile its own unread state. Inputs are checked, reads are bounded, and writes are committed transactionally so failed writes are not presented as durable.