fix: preserve web UI scrollback after compaction#781
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SamSaffron merged 1 commit intoJun 8, 2026
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What
Fix the web UI session-history tail refresh path so a compaction refresh cannot discard already-loaded pre-compaction scrollback when the refreshed tail window no longer overlaps the browser's local history.
Why
After context compaction, the server appends a compacted active-context suffix and reports
compaction_seq. A post-run tail refresh can be non-overlapping with the browser's currently loaded pre-compaction transcript. The old merge path treated that as a brand-new tail and replaced local history, leaving nothing to scroll up to.Verification
mise exec node@24 -- node internal/serveui/static/app_sessions_test.jsgo build ./...go test ./...