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fix(sync): preserve host replicas across provider remounts

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Make the host runtime own session and setup replicas for the registered host lifetime. Provider remounts can then reattach without clearing directory snapshots or timeline cursors.
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Mohamed Boudra
2026-07-21 13:44:23 +02:00
parent 8aa55db1e8
commit d0456b1943
4 changed files with 39 additions and 84 deletions
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docs/timeline-sync.md
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@@ -51,6 +51,16 @@ When a client resumes with a known cursor, it catches up after that cursor to co
When a client resumes without a cursor, it fetches the latest tail page.
## Client replica lifetime
The host runtime owns each session replica for as long as the host remains registered. React
providers attach message handlers and UI integrations to that replica, but mounting or unmounting a
provider must not create or clear it. A provider can remount during Fast Refresh or ordinary UI
recomposition while the runtime still owns the same directory snapshot and timeline cursors.
Removing the host from the registry is the destructive boundary: it stops the runtime and clears the
session and host-scoped setup state together.
## Selective and legacy delivery
The app chooses one delivery policy from `server_info.features.selectiveAgentTimeline`: