diff --git a/packages/opencode/src/cli/cmd/tui/component/dialog-agent.tsx b/packages/opencode/src/cli/cmd/tui/component/dialog-agent.tsx
index 365a22445b4..facceb25364 100644
--- a/packages/opencode/src/cli/cmd/tui/component/dialog-agent.tsx
+++ b/packages/opencode/src/cli/cmd/tui/component/dialog-agent.tsx
@@ -20,7 +20,7 @@ export function DialogAgent() {
   return (
     <DialogSelect
       title="Select agent"
-      current={local.agent.current().name}
+      current={local.agent.current()?.name ?? ""}
       options={options()}
       onSelect={(option) => {
         local.agent.set(option.value)
diff --git a/packages/opencode/src/cli/cmd/tui/component/prompt/index.tsx b/packages/opencode/src/cli/cmd/tui/component/prompt/index.tsx
index caa13032292..41d25ed6379 100644
--- a/packages/opencode/src/cli/cmd/tui/component/prompt/index.tsx
+++ b/packages/opencode/src/cli/cmd/tui/component/prompt/index.tsx
@@ -503,6 +503,10 @@ export function Prompt(props: PromptProps) {
       promptModelWarning()
       return
     }
+    const currentAgent = local.agent.current()
+    if (!currentAgent) {
+      return
+    }
     const sessionID = props.sessionID
       ? props.sessionID
       : await (async () => {
@@ -538,7 +542,7 @@ export function Prompt(props: PromptProps) {
     if (store.mode === "shell") {
       sdk.client.session.shell({
         sessionID,
-        agent: local.agent.current().name,
+        agent: currentAgent.name,
         model: {
           providerID: selectedModel.providerID,
           modelID: selectedModel.modelID,
@@ -565,7 +569,7 @@ export function Prompt(props: PromptProps) {
         sessionID,
         command: command.slice(1),
         arguments: args,
-        agent: local.agent.current().name,
+        agent: currentAgent.name,
         model: `${selectedModel.providerID}/${selectedModel.modelID}`,
         messageID,
         variant,
@@ -582,7 +586,7 @@ export function Prompt(props: PromptProps) {
           sessionID,
           ...selectedModel,
           messageID,
-          agent: local.agent.current().name,
+          agent: currentAgent.name,
           model: selectedModel,
           variant,
           parts: [
@@ -703,7 +707,9 @@ export function Prompt(props: PromptProps) {
   const highlight = createMemo(() => {
     if (keybind.leader) return theme.border
     if (store.mode === "shell") return theme.primary
-    return local.agent.color(local.agent.current().name)
+    const currentAgent = local.agent.current()
+    if (!currentAgent) return theme.border
+    return local.agent.color(currentAgent.name)
   })
 
   const showVariant = createMemo(() => {
@@ -714,7 +720,8 @@ export function Prompt(props: PromptProps) {
   })
 
   const spinnerDef = createMemo(() => {
-    const color = local.agent.color(local.agent.current().name)
+    const currentAgent = local.agent.current()
+    const color = currentAgent ? local.agent.color(currentAgent.name) : theme.border
     return {
       frames: createFrames({
         color,
@@ -952,7 +959,7 @@ export function Prompt(props: PromptProps) {
             />
             <box flexDirection="row" flexShrink={0} paddingTop={1} gap={1}>
               <text fg={highlight()}>
-                {store.mode === "shell" ? "Shell" : Locale.titlecase(local.agent.current().name)}{" "}
+                {store.mode === "shell" ? "Shell" : Locale.titlecase(local.agent.current()?.name ?? "")}{" "}
               </text>
               <Show when={store.mode === "normal"}>
                 <box flexDirection="row" gap={1}>
diff --git a/packages/opencode/src/cli/cmd/tui/context/local.tsx b/packages/opencode/src/cli/cmd/tui/context/local.tsx
index d058ce54fb3..9436d58468a 100644
--- a/packages/opencode/src/cli/cmd/tui/context/local.tsx
+++ b/packages/opencode/src/cli/cmd/tui/context/local.tsx
@@ -36,9 +36,9 @@ export const { use: useLocal, provider: LocalProvider } = createSimpleContext({
     const agent = iife(() => {
       const agents = createMemo(() => sync.data.agent.filter((x) => x.mode !== "subagent" && !x.hidden))
       const [agentStore, setAgentStore] = createStore<{
-        current: string
+        current: string | undefined
       }>({
-        current: agents()[0].name,
+        current: agents()[0]?.name,
       })
       const { theme } = useTheme()
       const colors = createMemo(() => [
@@ -54,7 +54,9 @@ export const { use: useLocal, provider: LocalProvider } = createSimpleContext({
           return agents()
         },
         current() {
-          return agents().find((x) => x.name === agentStore.current)!
+          const list = agents()
+          const found = list.find((x) => x.name === agentStore.current)
+          return found ?? list[0]
         },
         set(name: string) {
           if (!agents().some((x) => x.name === name))
@@ -67,10 +69,12 @@ export const { use: useLocal, provider: LocalProvider } = createSimpleContext({
         },
         move(direction: 1 | -1) {
           batch(() => {
-            let next = agents().findIndex((x) => x.name === agentStore.current) + direction
-            if (next < 0) next = agents().length - 1
-            if (next >= agents().length) next = 0
-            const value = agents()[next]
+            const list = agents()
+            if (list.length === 0) return
+            let next = list.findIndex((x) => x.name === agentStore.current) + direction
+            if (next < 0) next = list.length - 1
+            if (next >= list.length) next = 0
+            const value = list[next]
             setAgentStore("current", value.name)
           })
         },
@@ -188,6 +192,7 @@ export const { use: useLocal, provider: LocalProvider } = createSimpleContext({
 
       const currentModel = createMemo(() => {
         const a = agent.current()
+        if (!a) return undefined
         return (
           getFirstValidModel(
             () => modelStore.model[a.name],
@@ -228,6 +233,8 @@ export const { use: useLocal, provider: LocalProvider } = createSimpleContext({
         cycle(direction: 1 | -1) {
           const current = currentModel()
           if (!current) return
+          const currentAgent = agent.current()
+          if (!currentAgent) return
           const recent = modelStore.recent
           const index = recent.findIndex((x) => x.providerID === current.providerID && x.modelID === current.modelID)
           if (index === -1) return
@@ -236,7 +243,7 @@ export const { use: useLocal, provider: LocalProvider } = createSimpleContext({
           if (next >= recent.length) next = 0
           const val = recent[next]
           if (!val) return
-          setModelStore("model", agent.current().name, { ...val })
+          setModelStore("model", currentAgent.name, { ...val })
         },
         cycleFavorite(direction: 1 | -1) {
           const favorites = modelStore.favorite.filter((item) => isModelValid(item))
@@ -262,7 +269,9 @@ export const { use: useLocal, provider: LocalProvider } = createSimpleContext({
           }
           const next = favorites[index]
           if (!next) return
-          setModelStore("model", agent.current().name, { ...next })
+          const currentAgent = agent.current()
+          if (!currentAgent) return
+          setModelStore("model", currentAgent.name, { ...next })
           const uniq = uniqueBy([next, ...modelStore.recent], (x) => `${x.providerID}/${x.modelID}`)
           if (uniq.length > 10) uniq.pop()
           setModelStore(
@@ -281,7 +290,9 @@ export const { use: useLocal, provider: LocalProvider } = createSimpleContext({
               })
               return
             }
-            setModelStore("model", agent.current().name, model)
+            const currentAgent = agent.current()
+            if (!currentAgent) return
+            setModelStore("model", currentAgent.name, model)
             if (options?.recent) {
               const uniq = uniqueBy([model, ...modelStore.recent], (x) => `${x.providerID}/${x.modelID}`)
               if (uniq.length > 10) uniq.pop()
@@ -377,19 +388,18 @@ export const { use: useLocal, provider: LocalProvider } = createSimpleContext({
     // Automatically update model when agent changes
     createEffect(() => {
       const value = agent.current()
-      if (value.model) {
-        if (isModelValid(value.model))
-          model.set({
-            providerID: value.model.providerID,
-            modelID: value.model.modelID,
-          })
-        else
-          toast.show({
-            variant: "warning",
-            message: `Agent ${value.name}'s configured model ${value.model.providerID}/${value.model.modelID} is not valid`,
-            duration: 3000,
-          })
-      }
+      if (!value || !value.model) return
+      if (isModelValid(value.model))
+        model.set({
+          providerID: value.model.providerID,
+          modelID: value.model.modelID,
+        })
+      else
+        toast.show({
+          variant: "warning",
+          message: `Agent ${value.name}'s configured model ${value.model.providerID}/${value.model.modelID} is not valid`,
+          duration: 3000,
+        })
     })
 
     const result = {