This repository was archived by the owner on Aug 17, 2026. It is now read-only.
feat: session tail rehydrate for large chat history - #22
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July 16, 2026 19:32
Cold open and IDB persist keep only a newest-by-byte-budget tail (~4 MiB) instead of full-history replay. Server subscribe gains mode/window/fromSeq; client re-pins after hydrate and can page older history from the top.
Smoke fixes on top of mode:tail: - ChatView: only wheel/touch clears stick during hydrate (virtualizer pin no longer kills live follow) - load-older: no markReplaying/catch-up (avoid live-tail wipe) - IDB rehydrate seeds hasMoreOlder/minSeq; infer window meta when server omits it - windowEventsForSubscribe: lastSeq>0 is strict delta (disk full buffer must not re-send) - stale lastSeq rebuild uses cold tail window - explicit Load older messages control; batch send waits on back-pressure - Vite allowedHosts for zrok smoke
- Declare MessageHandlerDeps/ChatView Props/ReplayPersister contracts - Stale lastSeq: preserve legacy full mode; only explicit mode:tail windows - Disk load: reset when client lastSeq > loaded max, then cold rebuild - Load-older re-reduce keeps pending interactive asks - session_state_reset clears history-window/loadingOlder - loadingOlder clears only on isLast; no false hasMoreOlder on warm deltas - IDB put rechecks full array serialization against byte budget - Regression tests for client + server paths
- mode:tail disk-stale recovery test - ChatView load-older near-top/button + prepend compensation - virtualizer onChange compensates height when unstuck (D5 race)
Prevents vitest unhandled "window is not defined" when tanstack virtual notifies after jsdom teardown (CI suite error with all tests green).
Cherry-pick series onto main after upstream sync #17 diverged develop. Merge main scroll-to-top/ascent + selection pin with D5 prepend compensate, restore isSuperseded prop, align handler tests with reset delete semantics.
joeshull
requested review from
NathanielDake,
cmditch,
tomNummy and
tyler-keller
July 17, 2026 01:37
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Summary
Port session-tail-rehydrate to
mainafter upstream sync #17 madedevelop→mainnon-FF.Originally landed on develop via #13 (+ #20/#21 CI follow-ups). This PR cherry-picks the feature onto current
mainand merges main-only scroll-to-top/ascent + selection-pin behavior with D5 prepend compensation.Includes
mode:tail)Note
Main protection requires 1 approving review (enforce_admins). Please approve.
Supersedes conflicted #19.