docs/internals/connection-runtime.md                    |  15 ++
 packages/client-runtime/src/state/threadDetail.ts       |  45 +---
 packages/client-runtime/src/state/threadRetention.ts    |   6 +-
 packages/client-runtime/src/state/threads-atoms.test.ts | 430 ++++++++++++++++++++++++++++++--
 packages/client-runtime/src/state/threads-sync.test.ts  | 282 ++++++++++++++++++++-
 packages/client-runtime/src/state/threads.ts            | 262 ++++++++++++++-----
 6 files changed, 911 insertions(+), 129 deletions(-)