Avoid liveness races when starting side conversations - #34199
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copyberry[bot] merged 1 commit intoJul 19, 2026
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## Why The `thread/started` notification for a newly forked side conversation can arrive after the fork response. Selecting the side thread in that window could incorrectly report that it was unavailable. ## What changed - Seed agent navigation from the side-fork response before selecting the new thread. - Skip redundant liveness and parent-title reads for side threads that already have local state, while preserving liveness checks for uncached agent threads. ## Testing - Cover side-thread selection before `thread/started` is delivered. - Verify uncached threads are still checked and regular forks still resolve their parent title. GitOrigin-RevId: 1f9fb0586db8094bf5a2624bc4e1de06c9a783a1
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Avoid liveness races when starting side conversations
Why
The
thread/startednotification for a newly forked side conversation can arrive after the fork response. Selecting the side thread in that window could incorrectly report that it was unavailable.What changed
Testing
thread/startedis delivered.