diff --git a/packages/ui/src/lib/sse-manager.ts b/packages/ui/src/lib/sse-manager.ts
index e59987b7..fe7a13bc 100644
--- a/packages/ui/src/lib/sse-manager.ts
+++ b/packages/ui/src/lib/sse-manager.ts
@@ -13,6 +13,7 @@ import type {
   EventSessionError,
   EventSessionIdle,
   EventSessionUpdated,
+  EventSessionStatus,
 } from "@opencode-ai/sdk"
 import { serverEvents } from "./server-events"
 import type {
@@ -134,6 +135,9 @@ class SSEManager {
       case "session.idle":
         this.onSessionIdle?.(instanceId, event as EventSessionIdle)
         break
+      case "session.status":
+        this.onSessionStatus?.(instanceId, event as EventSessionStatus)
+        break
       case "permission.updated":
         this.onPermissionUpdated?.(instanceId, event as EventPermissionUpdated)
         break
@@ -171,6 +175,7 @@ class SSEManager {
   onSessionError?: (instanceId: string, event: EventSessionError) => void
   onTuiToast?: (instanceId: string, event: TuiToastEvent) => void
   onSessionIdle?: (instanceId: string, event: EventSessionIdle) => void
+  onSessionStatus?: (instanceId: string, event: EventSessionStatus) => void
   onPermissionUpdated?: (instanceId: string, event: EventPermissionUpdated) => void
   onPermissionReplied?: (instanceId: string, event: EventPermissionReplied) => void
   onLspUpdated?: (instanceId: string, event: EventLspUpdated) => void
diff --git a/packages/ui/src/stores/session-api.ts b/packages/ui/src/stores/session-api.ts
index e6468e36..fd4406bf 100644
--- a/packages/ui/src/stores/session-api.ts
+++ b/packages/ui/src/stores/session-api.ts
@@ -19,6 +19,7 @@ import {
   setProviders,
   setSessionInfoByInstance,
   setSessions,
+  setSessionStatus,
   sessions,
   loading,
   setLoading,
@@ -27,6 +28,7 @@ import {
 import { DEFAULT_MODEL_OUTPUT_LIMIT, getDefaultModel, isModelValid } from "./session-models"
 import { normalizeMessagePart } from "./message-v2/normalizers"
 import { updateSessionInfo } from "./message-v2/session-info"
+import { deriveSessionStatusFromMessages } from "./session-status"
 import { seedSessionMessagesV2 } from "./message-v2/bridge"
 import { messageStoreBus } from "./message-v2/bus"
 import { clearCacheForSession } from "../lib/global-cache"
@@ -82,6 +84,10 @@ async function fetchSessions(instanceId: string): Promise<void> {
     for (const apiSession of response.data) {
       const existingSession = existingSessions?.get(apiSession.id)
 
+      const compactingFlag = (apiSession.time as (Session["time"] & { compacting?: number | boolean }) | undefined)?.compacting
+      const isCompacting = typeof compactingFlag === "number" ? compactingFlag > 0 : Boolean(compactingFlag)
+      const existingStatus = existingSession?.status
+
       sessionMap.set(apiSession.id, {
         id: apiSession.id,
         instanceId,
@@ -89,6 +95,7 @@ async function fetchSessions(instanceId: string): Promise<void> {
         parentId: apiSession.parentID || null,
         agent: existingSession?.agent ?? "",
         model: existingSession?.model ?? { providerId: "", modelId: "" },
+        status: isCompacting ? "compacting" : (existingStatus ?? "idle"),
         version: apiSession.version,
         time: {
           ...apiSession.time,
@@ -183,6 +190,7 @@ async function createSession(instanceId: string, agent?: string): Promise<Sessio
       parentId: null,
       agent: selectedAgent,
       model: defaultModel,
+      status: "idle",
       version: response.data.version,
       time: {
         ...response.data.time,
@@ -290,6 +298,7 @@ async function forkSession(
       providerId: info.model?.providerID || "",
       modelId: info.model?.modelID || "",
     },
+    status: "idle",
     version: "0",
     time: info.time ? { ...info.time } : { created: Date.now(), updated: Date.now() },
     revert: info.revert
@@ -606,6 +615,11 @@ async function loadMessages(instanceId: string, sessionId: string, force = false
     }
     seedSessionMessagesV2(instanceId, sessionForV2, messages, messagesInfo)
 
+    if (!alreadyLoaded) {
+      const nextStatus = deriveSessionStatusFromMessages(instanceId, sessionId)
+      setSessionStatus(instanceId, sessionId, nextStatus)
+    }
+
   } catch (error) {
     log.error("Failed to load messages:", error)
     throw error
diff --git a/packages/ui/src/stores/session-events.ts b/packages/ui/src/stores/session-events.ts
index 9d13e055..8d02bb00 100644
--- a/packages/ui/src/stores/session-events.ts
+++ b/packages/ui/src/stores/session-events.ts
@@ -12,6 +12,7 @@ import type {
   EventSessionError,
   EventSessionIdle,
   EventSessionUpdated,
+  EventSessionStatus,
 } from "@opencode-ai/sdk"
 import type { MessageStatus } from "./message-v2/types"
 
@@ -19,11 +20,11 @@ import { getLogger } from "../lib/logger"
 import { showToastNotification, ToastVariant } from "../lib/notifications"
 import { instances, addPermissionToQueue, removePermissionFromQueue } from "./instances"
 import { showAlertDialog } from "./alerts"
+import { createClientSession, Session, SessionStatus } from "../types/session"
 import { sessions, setSessions, withSession } from "./session-state"
 import { normalizeMessagePart } from "./message-v2/normalizers"
 import { updateSessionInfo } from "./message-v2/session-info"
 
-const log = getLogger("sse")
 import { loadMessages } from "./session-api"
 import { setSessionCompactionState } from "./session-compaction"
 import {
@@ -39,6 +40,9 @@ import {
 import { messageStoreBus } from "./message-v2/bus"
 import type { InstanceMessageStore } from "./message-v2/instance-store"
 
+const log = getLogger("sse")
+const pendingSessionFetches = new Map<string, Promise<void>>()
+
 interface TuiToastEvent {
   type: "tui.toast.show"
   properties: {
@@ -51,8 +55,83 @@ interface TuiToastEvent {
 
 const ALLOWED_TOAST_VARIANTS = new Set<ToastVariant>(["info", "success", "warning", "error"])
 
+const mapSdkSessionStatus = (status: EventSessionStatus["properties"]["status"]): SessionStatus => {
+  if (!status || status.type === "idle") {
+    return "idle"
+  }
+  if (status.type === "retry") {
+    return "working"
+  }
+  return "working"
+}
+
+function applySessionStatus(instanceId: string, sessionId: string, status: SessionStatus, bumpUpdated = false) {
+  withSession(instanceId, sessionId, (session) => {
+    session.status = status
+    if (bumpUpdated) {
+      session.time = { ...(session.time ?? {}), updated: Date.now() }
+    }
+  })
+}
+
+async function fetchSessionInfo(instanceId: string, sessionId: string): Promise<Session | null> {
+  const instance = instances().get(instanceId)
+  if (!instance?.client) return null
+
+  try {
+    const response = await instance.client.session.get({ path: { id: sessionId } })
+    if (!response.data) return null
+
+    const fetched = createClientSession(response.data, instanceId)
+
+    setSessions((prev) => {
+      const next = new Map(prev)
+      const instanceSessions = new Map(next.get(instanceId) ?? [])
+      const existing = instanceSessions.get(sessionId)
+      instanceSessions.set(sessionId, {
+        ...fetched,
+        agent: existing?.agent ?? fetched.agent,
+        model: existing?.model ?? fetched.model,
+        status: existing?.status ?? fetched.status,
+        pendingPermission: existing?.pendingPermission ?? fetched.pendingPermission,
+      })
+      next.set(instanceId, instanceSessions)
+      return next
+    })
+
+    return fetched
+  } catch (error) {
+    log.error("Failed to fetch session info", error)
+    return null
+  }
+}
+
+function ensureSessionStatus(instanceId: string, sessionId: string, status: SessionStatus, bumpUpdated = false) {
+  const instanceSessions = sessions().get(instanceId)
+  const existing = instanceSessions?.get(sessionId)
+  if (existing) {
+    applySessionStatus(instanceId, sessionId, status, bumpUpdated)
+    return
+  }
+
+  const key = `${instanceId}:${sessionId}`
+  if (pendingSessionFetches.has(key)) {
+    return
+  }
+
+  const pending = (async () => {
+    const fetched = await fetchSessionInfo(instanceId, sessionId)
+    if (!fetched) return
+    applySessionStatus(instanceId, sessionId, status, bumpUpdated)
+  })()
+
+  pendingSessionFetches.set(key, pending)
+  void pending.finally(() => pendingSessionFetches.delete(key))
+}
+
 type MessageRole = "user" | "assistant"
 
+
 function resolveMessageRole(info?: MessageInfo | null): MessageRole {
   return info?.role === "user" ? "user" : "assistant"
 }
@@ -74,7 +153,6 @@ function findPendingMessageId(
 
 function handleMessageUpdate(instanceId: string, event: MessageUpdateEvent | MessagePartUpdatedEvent): void {
   const instanceSessions = sessions().get(instanceId)
-  if (!instanceSessions) return
 
   if (event.type === "message.part.updated") {
     const rawPart = event.properties?.part
@@ -90,9 +168,14 @@ function handleMessageUpdate(instanceId: string, event: MessageUpdateEvent | Mes
     const messageId = typeof part.messageID === "string" ? part.messageID : fallbackMessageId
     if (!sessionId || !messageId) return
  
-    const session = instanceSessions.get(sessionId)
-    if (!session) return
- 
+    const session = instanceSessions?.get(sessionId)
+    if (!session) {
+      ensureSessionStatus(instanceId, sessionId, "working", true)
+      return
+    }
+
+    applySessionStatus(instanceId, sessionId, "working", true)
+
     const store = messageStoreBus.getOrCreate(instanceId)
     const role: MessageRole = resolveMessageRole(messageInfo)
     const createdAt = typeof messageInfo?.time?.created === "number" ? messageInfo.time.created : Date.now()
@@ -135,10 +218,16 @@ function handleMessageUpdate(instanceId: string, event: MessageUpdateEvent | Mes
     const messageId = typeof info.id === "string" ? info.id : undefined
     if (!sessionId || !messageId) return
 
-    const session = instanceSessions.get(sessionId)
-    if (!session) return
+    const session = instanceSessions?.get(sessionId)
+    if (!session) {
+      ensureSessionStatus(instanceId, sessionId, "working", true)
+      return
+    }
+
+    applySessionStatus(instanceId, sessionId, "working", true)
 
     const store = messageStoreBus.getOrCreate(instanceId)
+
     const role: MessageRole = info.role === "user" ? "user" : "assistant"
     const hasError = Boolean((info as any).error)
     const status: MessageStatus = hasError ? "error" : "complete"
@@ -180,8 +269,7 @@ function handleSessionUpdate(instanceId: string, event: EventSessionUpdated): vo
   const isCompacting = typeof compactingFlag === "number" ? compactingFlag > 0 : Boolean(compactingFlag)
   setSessionCompactionState(instanceId, info.id, isCompacting)
 
-  const instanceSessions = sessions().get(instanceId)
-  if (!instanceSessions) return
+  const instanceSessions = sessions().get(instanceId) ?? new Map<string, Session>()
 
   const existingSession = instanceSessions.get(info.id)
 
@@ -196,6 +284,7 @@ function handleSessionUpdate(instanceId: string, event: EventSessionUpdated): vo
         providerId: "",
         modelId: "",
       },
+      status: isCompacting ? "compacting" : "idle",
       version: info.version || "0",
       time: info.time
         ? { ...info.time }
@@ -203,7 +292,7 @@ function handleSessionUpdate(instanceId: string, event: EventSessionUpdated): vo
             created: Date.now(),
             updated: Date.now(),
           },
-    } as any
+    } as Session
 
     setSessions((prev) => {
       const next = new Map(prev)
@@ -227,6 +316,7 @@ function handleSessionUpdate(instanceId: string, event: EventSessionUpdated): vo
     const updatedSession = {
       ...existingSession,
       title: info.title || existingSession.title,
+      status: isCompacting ? "compacting" : (existingSession.status ?? "idle"),
       time: mergedTime,
       revert: info.revert
         ? {
@@ -249,13 +339,23 @@ function handleSessionUpdate(instanceId: string, event: EventSessionUpdated): vo
   }
 }
 
-function handleSessionIdle(_instanceId: string, event: EventSessionIdle): void {
+function handleSessionIdle(instanceId: string, event: EventSessionIdle): void {
   const sessionId = event.properties?.sessionID
   if (!sessionId) return
 
+  ensureSessionStatus(instanceId, sessionId, "idle")
   log.info(`[SSE] Session idle: ${sessionId}`)
 }
 
+function handleSessionStatus(instanceId: string, event: EventSessionStatus): void {
+  const sessionId = event.properties?.sessionID
+  if (!sessionId) return
+
+  const status = mapSdkSessionStatus(event.properties.status)
+  ensureSessionStatus(instanceId, sessionId, status, status === "working")
+  log.info(`[SSE] Session status updated: ${sessionId}`, { status })
+}
+
 function handleSessionCompacted(instanceId: string, event: EventSessionCompacted): void {
   const sessionID = event.properties?.sessionID
   if (!sessionID) return
@@ -263,6 +363,7 @@ function handleSessionCompacted(instanceId: string, event: EventSessionCompacted
   log.info(`[SSE] Session compacted: ${sessionID}`)
 
   setSessionCompactionState(instanceId, sessionID, false)
+  ensureSessionStatus(instanceId, sessionID, "idle")
 
   withSession(instanceId, sessionID, (session) => {
     const time = { ...(session.time ?? {}) }
@@ -368,6 +469,7 @@ export {
   handleSessionCompacted,
   handleSessionError,
   handleSessionIdle,
+  handleSessionStatus,
   handleSessionUpdate,
   handleTuiToast,
 }
diff --git a/packages/ui/src/stores/session-state.ts b/packages/ui/src/stores/session-state.ts
index 78697b0a..bcb01f7a 100644
--- a/packages/ui/src/stores/session-state.ts
+++ b/packages/ui/src/stores/session-state.ts
@@ -1,6 +1,6 @@
 import { createSignal } from "solid-js"
 
-import type { Session, Agent, Provider } from "../types/session"
+import type { Session, SessionStatus, Agent, Provider } from "../types/session"
 import { deleteSession, loadMessages } from "./session-api"
 import { showToastNotification } from "../lib/notifications"
 import { messageStoreBus } from "./message-v2/bus"
@@ -157,6 +157,11 @@ function setSessionCompactionState(instanceId: string, sessionId: string, isComp
     const time = { ...(session.time ?? {}) }
     time.compacting = isCompacting ? Date.now() : 0
     session.time = time
+    if (isCompacting) {
+      session.status = "compacting"
+    } else if (session.status === "compacting") {
+      session.status = "idle"
+    }
   })
 }
 
@@ -199,6 +204,12 @@ function clearActiveParentSession(instanceId: string): void {
   })
 }
 
+function setSessionStatus(instanceId: string, sessionId: string, status: SessionStatus): void {
+  withSession(instanceId, sessionId, (session) => {
+    session.status = status
+  })
+}
+
 function getActiveParentSession(instanceId: string): Session | null {
   const parentId = activeParentSessionId().get(instanceId)
   if (!parentId) return null
@@ -380,6 +391,7 @@ export {
   withSession,
   setSessionCompactionState,
   setSessionPendingPermission,
+  setSessionStatus,
   setActiveSession,
  
   setActiveParentSession,
diff --git a/packages/ui/src/stores/session-status.ts b/packages/ui/src/stores/session-status.ts
index 7d77827e..81da79f7 100644
--- a/packages/ui/src/stores/session-status.ts
+++ b/packages/ui/src/stores/session-status.ts
@@ -112,7 +112,7 @@ function isAssistantStillGeneratingRecord(record: MessageRecord, info?: MessageI
 }
 
 
-export function getSessionStatus(instanceId: string, sessionId: string): SessionStatus {
+export function deriveSessionStatusFromMessages(instanceId: string, sessionId: string): SessionStatus {
   const session = getSession(instanceId, sessionId)
   if (!session) {
     return "idle"
@@ -162,6 +162,14 @@ export function getSessionStatus(instanceId: string, sessionId: string): Session
   return "idle"
 }
 
+export function getSessionStatus(instanceId: string, sessionId: string): SessionStatus {
+  const session = getSession(instanceId, sessionId)
+  if (!session) {
+    return "idle"
+  }
+  return session.status ?? deriveSessionStatusFromMessages(instanceId, sessionId)
+}
+
 export function isSessionBusy(instanceId: string, sessionId: string): boolean {
   const status = getSessionStatus(instanceId, sessionId)
   return status === "working" || status === "compacting"
diff --git a/packages/ui/src/stores/sessions.ts b/packages/ui/src/stores/sessions.ts
index 2ab6f2bd..739e6e33 100644
--- a/packages/ui/src/stores/sessions.ts
+++ b/packages/ui/src/stores/sessions.ts
@@ -26,6 +26,7 @@ import {
   setActiveParentSession,
   setActiveSession,
   setSessionDraftPrompt,
+  setSessionStatus,
  } from "./session-state"
 
 import { getDefaultModel } from "./session-models"
@@ -56,6 +57,7 @@ import {
   handleSessionCompacted,
   handleSessionError,
   handleSessionIdle,
+  handleSessionStatus,
   handleSessionUpdate,
   handleTuiToast,
 } from "./session-events"
@@ -68,6 +70,7 @@ sseManager.onSessionUpdate = handleSessionUpdate
 sseManager.onSessionCompacted = handleSessionCompacted
 sseManager.onSessionError = handleSessionError
 sseManager.onSessionIdle = handleSessionIdle
+sseManager.onSessionStatus = handleSessionStatus
 sseManager.onTuiToast = handleTuiToast
 sseManager.onPermissionUpdated = handlePermissionUpdated
 sseManager.onPermissionReplied = handlePermissionReplied
@@ -109,6 +112,7 @@ export {
   setActiveParentSession,
   setActiveSession,
   setSessionDraftPrompt,
+  setSessionStatus,
   updateSessionAgent,
   updateSessionModel,
 }
diff --git a/packages/ui/src/types/session.ts b/packages/ui/src/types/session.ts
index f888244b..f01aac44 100644
--- a/packages/ui/src/types/session.ts
+++ b/packages/ui/src/types/session.ts
@@ -27,6 +27,7 @@ export interface Session
   }
   version: string // Include version from SDK Session
   pendingPermission?: boolean // Indicates if session is waiting on user permission
+  status: SessionStatus // Single source of truth for session status
 }
 
 // Adapter function to convert SDK Session to client Session
@@ -42,6 +43,7 @@ export function createClientSession(
     parentId: sdkSession.parentID || null,
     agent,
     model,
+    status: "idle",
   }
 }