fix: recover stuck live session updates

Reconnects and resyncs active sessions when live updates stall
Normalizes synthetic session status events
Uses authoritative status snapshots to clear stale busy states

packages/ui/src/sync/event-pipeline.test.ts

@@ -96,4 +96,43 @@ describe("createEventPipeline", () => {
       return `updated:${((event.properties as { part: { text: string } }).part).text}`
     })).toEqual(["updated:a", "delta:b", "updated:ab"])
   })
+
+  test("normalizes openchamber session status events", async () => {
+    let resolveStreamFinished!: () => void
+    const streamFinished = new Promise<void>((resolve) => {
+      resolveStreamFinished = resolve
+    })
+    let resolveDelivered!: (event: Event) => void
+    const deliveredEvent = new Promise<Event>((resolve) => {
+      resolveDelivered = resolve
+    })
+    const pipeline = createEventPipeline({
+      sdk: createSdk([
+        {
+          type: "openchamber:session-status",
+          properties: {
+            sessionID: "ses_1",
+            status: "idle",
+          },
+        } as unknown as Event,
+      ], resolveStreamFinished),
+      onEvent: (_directory, payload) => {
+        resolveDelivered(payload)
+      },
+      transport: "sse",
+      heartbeatTimeoutMs: 1_000,
+    })
+
+    try {
+      await streamFinished
+      const delivered = await Promise.race([deliveredEvent, failAfter(500)])
+      expect(delivered.type).toBe("session.status")
+      expect(delivered.properties).toEqual({
+        sessionID: "ses_1",
+        status: { type: "idle" },
+      })
+    } finally {
+      pipeline.cleanup()
+    }
+  })
 })

packages/ui/src/sync/event-pipeline.ts

@@ -12,7 +12,7 @@
  * Abort controller created once at init, cleaned up via returned cleanup fn.
  */
 
-import type { Event, OpencodeClient } from "@opencode-ai/sdk/v2/client"
+import type { Event, OpencodeClient, SessionStatus } from "@opencode-ai/sdk/v2/client"
 import { opencodeClient } from "@/lib/opencode/client"
 import { syncDebug } from "./debug"
 
@@ -59,6 +59,11 @@ export type EventPipelineInput = {
   wsReadyTimeoutMs?: number
 }
 
+export type EventPipeline = {
+  cleanup: () => void
+  reconnect: (reason?: string) => void
+}
+
 type MessageStreamWsFrame = {
   type: "ready" | "event" | "error" | "backpressure"
   payload?: unknown
@@ -68,7 +73,70 @@ type MessageStreamWsFrame = {
   scope?: "global" | "directory"
 }
 
+const normalizeOpenChamberSessionStatus = (payload: Event): Event | null => {
+  const record = payload as unknown as {
+    id?: unknown
+    type?: unknown
+    properties?: {
+      sessionID?: unknown
+      sessionId?: unknown
+      status?: unknown
+      metadata?: {
+        attempt?: unknown
+        message?: unknown
+        next?: unknown
+      }
+    }
+  }
+
+  if (record.type !== "openchamber:session-status") return null
+
+  const sessionID = typeof record.properties?.sessionID === "string" && record.properties.sessionID.length > 0
+    ? record.properties.sessionID
+    : typeof record.properties?.sessionId === "string" && record.properties.sessionId.length > 0
+      ? record.properties.sessionId
+      : ""
+  const rawStatus = typeof record.properties?.status === "string" ? record.properties.status : ""
+  if (!sessionID || !rawStatus) return null
+
+  let status: SessionStatus | null = null
+  if (rawStatus === "idle" || rawStatus === "busy") {
+    status = { type: rawStatus }
+  } else if (rawStatus === "retry") {
+    const metadata = record.properties?.metadata
+    if (
+      typeof metadata?.attempt === "number"
+      && typeof metadata.message === "string"
+      && typeof metadata.next === "number"
+    ) {
+      status = {
+        type: "retry",
+        attempt: metadata.attempt,
+        message: metadata.message,
+        next: metadata.next,
+      }
+    }
+  }
+  if (!status) return null
+
+  return {
+    id: typeof record.id === "string" && record.id.length > 0
+      ? record.id
+      : `openchamber-status-${sessionID}-${Date.now()}`,
+    type: "session.status",
+    properties: {
+      sessionID,
+      status,
+    },
+  } as Event
+}
+
 const normalizeEventType = (payload: Event): Event => {
+  const normalizedOpenChamberStatus = normalizeOpenChamberSessionStatus(payload)
+  if (normalizedOpenChamberStatus) {
+    return normalizedOpenChamberStatus
+  }
+
   const type = (payload as { type?: unknown }).type
   if (typeof type !== "string") {
     return payload
@@ -173,13 +241,10 @@ type DirectoryQueue = {
 
 type AttemptAbortReason =
   | "pipeline_stopped"
-  | "ws_heartbeat_timeout"
+  | `${"ws" | "sse"}_${string}`
-  | "sse_heartbeat_timeout"
-  | "ws_system_resume"
-  | "sse_system_resume"
   | null
 
-export function createEventPipeline(input: EventPipelineInput) {
+export function createEventPipeline(input: EventPipelineInput): EventPipeline {
   const {
     sdk,
     onEvent,
@@ -669,10 +734,8 @@ export function createEventPipeline(input: EventPipelineInput) {
         if (currentTransport === "ws" && code === "WS_FALLBACK") {
           retryDelayMs = 0
           // Transport switch (WS → SSE fallback), not a real disconnection.
-          // No events were lost — the next attempt will use SSE and carry
+          // The consumer still gets a hook so it can resync authoritative
-          // lastEventId for gapless replay. Notify consumer so it can set
+          // state; real networks can lose/buffer events around transport flips.
-          // isConnected, but do NOT treat this as a disconnection requiring
-          // a full directory resync.
           onTransportSwitch?.()
         } else if (!isAbortError(error)) {
           consecutiveFailures += 1
@@ -772,6 +835,11 @@ export function createEventPipeline(input: EventPipelineInput) {
     attempt?.abort()
   }
 
+  const reconnect = (reason = "manual") => {
+    attemptAbortReason = `${activeTransport}_${reason}`
+    attempt?.abort()
+  }
+
   if (typeof document !== "undefined") {
     document.addEventListener("visibilitychange", onVisibility)
     window.addEventListener("pageshow", onPageShow)
@@ -799,5 +867,5 @@ export function createEventPipeline(input: EventPipelineInput) {
     flushAll()
   }
 
-  return { cleanup }
+  return { cleanup, reconnect }
 }

packages/ui/src/sync/sync-context.tsx

@@ -127,6 +127,10 @@ const BOOT_DEBOUNCE_MS = 1500
 const RECONNECT_MESSAGE_LIMIT = 30
 const SESSION_MATERIALIZATION_MESSAGE_LIMIT = 30
 const RECONNECT_SKIP_PARTS = new Set(["patch", "step-start", "step-finish"])
+const ACTIVE_SESSION_WATCHDOG_INTERVAL_MS = 5_000
+const ACTIVE_SESSION_STATUS_POLL_INTERVAL_MS = 5_000
+const ACTIVE_SESSION_STALE_EVENT_MS = 20_000
+const ACTIVE_SESSION_FULL_RESYNC_COOLDOWN_MS = 15_000
 const requestSignature = (items: Array<{ id: string }> | undefined): string => {
   if (!items || items.length === 0) return ""
   return items
@@ -312,6 +316,87 @@ function toSessionStatus(status: Awaited<ReturnType<typeof opencodeClient.getSes
   return undefined
 }
 
+function isStreamHeartbeatEvent(payload: Event): boolean {
+  const type = (payload as { type?: unknown }).type
+  return type === "server.heartbeat" || type === "openchamber:heartbeat"
+}
+
+function getActiveSessionCandidateIds(directory: string, state: DirectoryStore): string[] {
+  return getReconnectCandidateSessionIds(state, {
+    directory,
+    viewedSession: getViewedSessionMaterializationTarget(directory),
+  })
+}
+
+function buildRelevantSessionStatuses(
+  nextStatuses: Awaited<ReturnType<typeof opencodeClient.getSessionStatusForDirectory>>,
+  candidateSessionIds: string[],
+): Record<string, SessionStatus> | null {
+  if (nextStatuses === null) return null
+  const relevantStatuses: Record<string, SessionStatus> = {}
+  for (const sessionId of candidateSessionIds) {
+    relevantStatuses[sessionId] = toSessionStatus(nextStatuses[sessionId]) ?? { type: "idle" }
+  }
+  return relevantStatuses
+}
+
+function applySessionStatusSnapshot(
+  store: StoreApi<DirectoryStore>,
+  relevantStatuses: Record<string, SessionStatus>,
+): boolean {
+  if (Object.keys(relevantStatuses).length === 0) return false
+
+  let changed = false
+  store.setState((state: DirectoryStore) => {
+    for (const [sessionId, nextStatus] of Object.entries(relevantStatuses)) {
+      if (!haveEquivalentSyncSnapshots(state.session_status?.[sessionId], nextStatus)) {
+        changed = true
+        break
+      }
+    }
+
+    if (!changed) {
+      return state
+    }
+
+    return {
+      session_status: { ...state.session_status, ...relevantStatuses },
+    }
+  })
+
+  return changed
+}
+
+async function resyncDirectorySessionStatuses(
+  directory: string,
+  store: StoreApi<DirectoryStore>,
+  candidateSessionIds: string[],
+): Promise<Record<string, SessionStatus> | null> {
+  const nextStatuses = await opencodeClient.getSessionStatusForDirectory(directory)
+  // null = fetch failed; preserve existing state. {} or populated = authoritative
+  // snapshot of active sessions — candidates not listed are idle now.
+  const relevantStatuses = buildRelevantSessionStatuses(nextStatuses, candidateSessionIds)
+  if (relevantStatuses === null) return null
+  applySessionStatusSnapshot(store, relevantStatuses)
+  return relevantStatuses
+}
+
+function needsSnapshotAfterStatusPoll(
+  state: DirectoryStore,
+  sessionId: string,
+  nextStatus: SessionStatus | undefined,
+): boolean {
+  if (nextStatus?.type !== "idle") return false
+  const currentStatus = state.session_status?.[sessionId]
+  if (currentStatus && currentStatus.type !== "idle") return true
+
+  const messages = state.message[sessionId]
+  const lastMessage = messages?.[messages.length - 1]
+  return !!lastMessage
+    && lastMessage.role === "assistant"
+    && typeof (lastMessage as { time?: { completed?: number } }).time?.completed !== "number"
+}
+
 type EventRoutingIndex = {
   sessionDirectoryById: Map<string, string>
   messageSessionById: Map<string, string>
@@ -901,41 +986,10 @@ async function resyncDirectoryAfterReconnect(
   routingIndex: EventRoutingIndex,
 ) {
   const current = store.getState()
-  const candidateSessionIds = getReconnectCandidateSessionIds(current, {
+  const candidateSessionIds = getActiveSessionCandidateIds(directory, current)
-    directory,
-    viewedSession: getViewedSessionMaterializationTarget(directory),
-  })
   if (candidateSessionIds.length === 0) return
 
-  const nextStatuses = await opencodeClient.getSessionStatusForDirectory(directory)
+  await resyncDirectorySessionStatuses(directory, store, candidateSessionIds)
-  // null = fetch failed; preserve existing state. {} or populated = authoritative
-  // snapshot of active sessions — candidates not listed are idle now.
-  if (nextStatuses !== null) {
-    const relevantStatuses: Record<string, SessionStatus> = {}
-    for (const sessionId of candidateSessionIds) {
-      relevantStatuses[sessionId] = toSessionStatus(nextStatuses[sessionId]) ?? { type: "idle" }
-    }
-
-    if (Object.keys(relevantStatuses).length > 0) {
-      store.setState((state: DirectoryStore) => {
-        let changed = false
-        for (const [sessionId, nextStatus] of Object.entries(relevantStatuses)) {
-          if (!haveEquivalentSyncSnapshots(state.session_status?.[sessionId], nextStatus)) {
-            changed = true
-            break
-          }
-        }
-
-        if (!changed) {
-          return state
-        }
-
-        return {
-          session_status: { ...state.session_status, ...relevantStatuses },
-        }
-      })
-    }
-  }
 
   const scopedClient = opencodeClient.getScopedSdkClient(directory)
   await Promise.all(candidateSessionIds.map(async (sessionId) => {
@@ -1314,6 +1368,12 @@ export function SyncProvider(props: {
   const routingIndexRef = useRef<EventRoutingIndex | null>(null)
   if (!routingIndexRef.current) routingIndexRef.current = createEventRoutingIndex()
   const routingIndex = routingIndexRef.current
+  const lastActiveEventAtByDirectoryRef = useRef(new Map<string, number>())
+  const lastStatusPollAtByDirectoryRef = useRef(new Map<string, number>())
+  const lastFullResyncAtByDirectoryRef = useRef(new Map<string, number>())
+  const resyncingDirectoriesRef = useRef(new Set<string>())
+  const statusPollingDirectoriesRef = useRef(new Set<string>())
+  const pipelineReconnectRef = useRef<((reason?: string) => void) | null>(null)
 
   const system = useMemo<SyncSystem>(
     () => ({
@@ -1324,6 +1384,23 @@ export function SyncProvider(props: {
     [childStores, props.sdk, props.directory],
   )
 
+  const triggerDirectoryResync = useCallback((directory: string) => {
+    const store = childStores.children.get(directory)
+    if (!store) return
+    const resyncing = resyncingDirectoriesRef.current
+    if (resyncing.has(directory)) return
+
+    lastFullResyncAtByDirectoryRef.current.set(directory, Date.now())
+    resyncing.add(directory)
+    void resyncDirectoryAfterReconnect(directory, store, routingIndex)
+      .catch(() => {
+        // Transient failure — the watchdog, next SSE event, or reconnect will catch up.
+      })
+      .finally(() => {
+        resyncing.delete(directory)
+      })
+  }, [childStores, routingIndex])
+
   // Configure child store manager
   useEffect(() => {
     const bootingDirs = new Set<string>()
@@ -1435,30 +1512,16 @@ export function SyncProvider(props: {
   // Event pipeline — created once per mount. No class, no start/stop.
   // Abort controller owned by the pipeline closure. Cleanup aborts + flushes.
   useEffect(() => {
-    const reconnectMaterializing = new Set<string>()
+    const pipeline = createEventPipeline({
-    const triggerReconnectMaterialization = (directory: string) => {
-      const store = childStores.children.get(directory)
-      if (!store) return
-      if (reconnectMaterializing.has(directory)) return
-
-      reconnectMaterializing.add(directory)
-      void resyncDirectoryAfterReconnect(directory, store, routingIndex)
-        .catch(() => {
-          // Transient failure during materialization — next SSE event, transport switch,
-          // or reconnect will catch up.
-        })
-        .finally(() => {
-          reconnectMaterializing.delete(directory)
-        })
-    }
-
-    const { cleanup } = createEventPipeline({
       sdk: props.sdk,
       transport: messageStreamTransport,
       routeDirectory: (directory, payload) => {
         return resolveDirectoryFromRoutingIndex(routingIndex, directory, payload, childStores)
       },
       onEvent: (directory, payload) => {
+        if (!isStreamHeartbeatEvent(payload)) {
+          lastActiveEventAtByDirectoryRef.current.set(directory, Date.now())
+        }
         dispatchVSCodeRuntimeNotificationEvent(directory, payload)
         if (payload.type === "installation.update-available") {
           const version = typeof (payload.properties as { version?: unknown })?.version === "string"
@@ -1477,7 +1540,7 @@ export function SyncProvider(props: {
           connectionPhase: "connected",
         })
         for (const dir of childStores.children.keys()) {
-          triggerReconnectMaterialization(dir)
+          triggerDirectoryResync(dir)
         }
       },
       onDisconnect: (reason) => {
@@ -1489,21 +1552,108 @@ export function SyncProvider(props: {
         })
       },
       onTransportSwitch: () => {
-        // Transport switched (e.g. WS timeout → SSE fallback) without a full
+        // Transport changes are gap-prone in real networks. Treat them like a
-        // disconnect. If the active session missed the transition into a busy
+        // reconnect and refresh active session snapshots from HTTP.
-        // turn, force a targeted resync for the viewed directory.
         useConfigStore.setState({
           isConnected: true,
           hasEverConnected: true,
           connectionPhase: "connected",
         })
-        if (_activeDirectory) {
+        for (const dir of childStores.children.keys()) {
-          triggerReconnectMaterialization(_activeDirectory)
+          triggerDirectoryResync(dir)
         }
       },
     })
-    return cleanup
+    pipelineReconnectRef.current = pipeline.reconnect
-  }, [props.sdk, childStores, routingIndex, messageStreamTransport])
+    return () => {
+      if (pipelineReconnectRef.current === pipeline.reconnect) {
+        pipelineReconnectRef.current = null
+      }
+      pipeline.cleanup()
+    }
+  }, [props.sdk, childStores, routingIndex, messageStreamTransport, triggerDirectoryResync])
+
+  useEffect(() => {
+    let stopped = false
+    let running = false
+
+    const pollDirectoryStatuses = async (
+      directory: string,
+      store: StoreApi<DirectoryStore>,
+      candidateSessionIds: string[],
+    ) => {
+      const polling = statusPollingDirectoriesRef.current
+      if (polling.has(directory)) return
+      polling.add(directory)
+      try {
+        const before = store.getState()
+        const statuses = await resyncDirectorySessionStatuses(directory, store, candidateSessionIds)
+        if (!statuses) return
+        const needsSnapshot = candidateSessionIds.some((sessionId) => (
+          needsSnapshotAfterStatusPoll(before, sessionId, statuses[sessionId])
+        ))
+        if (needsSnapshot) {
+          triggerDirectoryResync(directory)
+        }
+      } finally {
+        polling.delete(directory)
+      }
+    }
+
+    const tick = () => {
+      if (running || stopped) return
+      running = true
+      void Promise.resolve()
+        .then(() => {
+          if (stopped) return
+          const now = Date.now()
+          for (const [directory, store] of childStores.children.entries()) {
+            const state = store.getState()
+            const candidateSessionIds = getActiveSessionCandidateIds(directory, state)
+            if (candidateSessionIds.length === 0) {
+              lastActiveEventAtByDirectoryRef.current.delete(directory)
+              lastStatusPollAtByDirectoryRef.current.delete(directory)
+              lastFullResyncAtByDirectoryRef.current.delete(directory)
+              continue
+            }
+
+            if (!lastActiveEventAtByDirectoryRef.current.has(directory)) {
+              lastActiveEventAtByDirectoryRef.current.set(directory, now)
+            }
+
+            const lastStatusPollAt = lastStatusPollAtByDirectoryRef.current.get(directory) ?? 0
+            if (now - lastStatusPollAt >= ACTIVE_SESSION_STATUS_POLL_INTERVAL_MS) {
+              lastStatusPollAtByDirectoryRef.current.set(directory, now)
+              void pollDirectoryStatuses(directory, store, candidateSessionIds).catch(() => undefined)
+            }
+
+            const lastActiveEventAt = lastActiveEventAtByDirectoryRef.current.get(directory) ?? now
+            const lastFullResyncAt = lastFullResyncAtByDirectoryRef.current.get(directory) ?? 0
+            if (
+              now - lastActiveEventAt >= ACTIVE_SESSION_STALE_EVENT_MS
+              && now - lastFullResyncAt >= ACTIVE_SESSION_FULL_RESYNC_COOLDOWN_MS
+            ) {
+              pipelineReconnectRef.current?.("active_stream_stale")
+              triggerDirectoryResync(directory)
+            }
+          }
+        })
+        .finally(() => {
+          running = false
+          if (stopped) {
+            statusPollingDirectoriesRef.current.clear()
+          }
+        })
+    }
+
+    const interval = setInterval(tick, ACTIVE_SESSION_WATCHDOG_INTERVAL_MS)
+    tick()
+
+    return () => {
+      stopped = true
+      clearInterval(interval)
+    }
+  }, [childStores, triggerDirectoryResync])
 
   // Ensure current directory's child store exists
   useEffect(() => {

packages/web/server/index.js

@@ -726,7 +726,7 @@ const processForwardedEventPayload = (payload, emitSyntheticEvent) => {
   emitSyntheticEvent({
     type: 'openchamber:session-status',
     properties: {
-      sessionId,
+      sessionID: sessionId,
       status,
       timestamp: Date.now(),
       metadata: {

packages/web/server/lib/opencode/session-runtime.js

@@ -158,7 +158,7 @@ export const createSessionRuntime = ({ writeSseEvent, getNotificationClients, br
       const syntheticPayload = {
         type: 'openchamber:session-status',
         properties: {
-          sessionId,
+          sessionID: sessionId,
           status: state.status,
           timestamp: state.lastUpdateAt,
           metadata: state.metadata,
@@ -216,7 +216,7 @@ export const createSessionRuntime = ({ writeSseEvent, getNotificationClients, br
       const syntheticPayload = {
         type: 'openchamber:session-status',
         properties: {
-          sessionId,
+          sessionID: sessionId,
           status: state.status,
           timestamp: Date.now(),
           metadata: {},

packages/web/server/lib/opencode/session-runtime.test.js

@@ -49,7 +49,7 @@ describe('session runtime', () => {
     expect(events).toContainEqual({
       type: 'openchamber:session-status',
       properties: expect.objectContaining({
-        sessionId: 'session-1',
+        sessionID: 'session-1',
         status: 'idle',
         needsAttention: true,
       }),
@@ -57,7 +57,7 @@ describe('session runtime', () => {
     expect(events.at(-1)).toEqual({
       type: 'openchamber:session-status',
       properties: {
-        sessionId: 'session-1',
+        sessionID: 'session-1',
         status: 'idle',
         timestamp: expect.any(Number),
         metadata: {},
@@ -92,7 +92,7 @@ describe('session runtime', () => {
     expect(events).toContainEqual({
       type: 'openchamber:session-status',
       properties: expect.objectContaining({
-        sessionId: 'legacy-session-1',
+        sessionID: 'legacy-session-1',
         status: 'busy',
       }),
     });