Two-reviewer audit of the thread stack; confirmed findings fixed:
- ThreadTimeline: wrap encrypted events in EncryptedContent so a live-arriving
E2EE reply re-renders when its key decrypts (decryption emits neither
RoomEvent.Timeline nor ThreadEvent.Update — previously stuck at "Unable to
decrypt").
- ThreadPanel: mark-read deduped on the latest event id (RoomEvent.Timeline
re-emits per backfilled event/edit/reaction; previously up to N receipt POSTs
per panel open) + rejection handled with retry.
- RoomTimeline: ThreadSummary chips now mount only for events carrying thread
data (each chip holds a room-level listener; one per rendered message would
blow the SDK's 100-listener emitter cap) with a single room-level
ThreadEvent.New tick for new-thread liveness.
- useThreadPendingEvents: keep a sent reply visible through the /send-response→
/sync window (was flashing out of the pending strip before landing).
- ThreadTimeline: reseed the window on RoomEvent.TimelineReset (gappy sync left
a detached timeline).
Documented-acceptable (reviewer-noted): thread typing shows as room typing (no
per-thread typing in the spec; Element matches), thread panel + members drawer
can be open together, scheduled-send is thread-unaware but unreachable there.
Gates: tsc clean, eslint 0 errors, build OK, 616/617 tests (1 IDB skip).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Right-side thread drawer (MembersDrawer pattern; mobile fullscreen):
- ThreadPanel: header + close/Escape, ThreadTimeline, its own RoomInput
(threadRootId prop; drafts/replies/uploads isolated per roomId::threadId;
schedule + slash-commands off in threads v1) and threaded mark-as-read.
- ThreadTimeline: lean reimplementation over thread.liveTimeline — copied
useTimelinePagination pattern (/relations back-pagination + decryption),
virtualized, root event emphasized + "N replies" divider, reactions/edits/
redactions, and a pending strip (chronological local echo never enters the
thread timelineSet — rendered from LocalEchoUpdated instead).
- ThreadSummary chips on root messages (server-aggregated bundle or live
Thread; unread badge via getThreadUnreadNotificationCount) keep threads
discoverable now that replies leave the main timeline.
- Reply-in-Thread menu + thread indicators open the panel; deep links to
thread events redirect into it.
- State: roomIdToActiveThreadIdAtomFamily + getThreadDraftKey (+18 tests).
Gates: tsc clean, eslint 0 errors, build OK, 616/617 tests (1 IDB skip).
Awaiting live QA; release note: threaded replies no longer render inline.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
jared