diff --git a/packages/ui/src/sync/__tests__/event-reducer.test.ts b/packages/ui/src/sync/__tests__/event-reducer.test.ts
index bef5e324..449eb17e 100644
--- a/packages/ui/src/sync/__tests__/event-reducer.test.ts
+++ b/packages/ui/src/sync/__tests__/event-reducer.test.ts
@@ -1,5 +1,5 @@
 import { describe, expect, test } from "bun:test"
-import type { Event, Part } from "@opencode-ai/sdk/v2/client"
+import type { Event, Part, PermissionRequest, QuestionRequest } from "@opencode-ai/sdk/v2/client"
 import { applyDirectoryEvent } from "../event-reducer"
 import { INITIAL_STATE, type State } from "../types"
 
@@ -86,4 +86,61 @@ describe("applyDirectoryEvent", () => {
     expect(draft.part.msg_1.map((item) => item.id)).toEqual(["prt_1"])
     expect(result).toBe(true)
   })
+
+  test("updates permission request arrays immutably", () => {
+    const initialPermissions = [
+      { id: "perm_1", sessionID: "ses_1" } as PermissionRequest,
+    ]
+    const draft = state({ permission: { ses_1: initialPermissions } })
+
+    applyDirectoryEvent(draft, {
+      type: "permission.asked",
+      properties: { id: "perm_2", sessionID: "ses_1" } as PermissionRequest,
+    } as Event)
+
+    expect(draft.permission.ses_1).not.toBe(initialPermissions)
+    expect(draft.permission.ses_1.map((item) => item.id)).toEqual(["perm_1", "perm_2"])
+
+    const afterAsk = draft.permission.ses_1
+    applyDirectoryEvent(draft, {
+      type: "permission.replied",
+      properties: { sessionID: "ses_1", requestID: "perm_1" },
+    } as Event)
+
+    expect(draft.permission.ses_1).not.toBe(afterAsk)
+    expect(draft.permission.ses_1.map((item) => item.id)).toEqual(["perm_2"])
+  })
+
+  test("updates question request arrays immutably", () => {
+    const initialQuestions = [
+      { id: "ques_1", sessionID: "ses_1" } as QuestionRequest,
+    ]
+    const draft = state({ question: { ses_1: initialQuestions } })
+
+    applyDirectoryEvent(draft, {
+      type: "question.asked",
+      properties: { id: "ques_2", sessionID: "ses_1" } as QuestionRequest,
+    } as Event)
+
+    expect(draft.question.ses_1).not.toBe(initialQuestions)
+    expect(draft.question.ses_1.map((item) => item.id)).toEqual(["ques_1", "ques_2"])
+
+    const afterAsk = draft.question.ses_1
+    applyDirectoryEvent(draft, {
+      type: "question.replied",
+      properties: { sessionID: "ses_1", requestID: "ques_1" },
+    } as Event)
+
+    expect(draft.question.ses_1).not.toBe(afterAsk)
+    expect(draft.question.ses_1.map((item) => item.id)).toEqual(["ques_2"])
+
+    const afterReply = draft.question.ses_1
+    applyDirectoryEvent(draft, {
+      type: "question.rejected",
+      properties: { sessionID: "ses_1", requestID: "ques_2" },
+    } as Event)
+
+    expect(draft.question.ses_1).not.toBe(afterReply)
+    expect(draft.question.ses_1).toEqual([])
+  })
 })
diff --git a/packages/ui/src/sync/event-reducer.ts b/packages/ui/src/sync/event-reducer.ts
index 5ef37a85..f1004d48 100644
--- a/packages/ui/src/sync/event-reducer.ts
+++ b/packages/ui/src/sync/event-reducer.ts
@@ -400,13 +400,14 @@ export function applyDirectoryEvent(
     case "permission.asked": {
       const permission = event.properties as PermissionRequest
       const permissions = draft.permission[permission.sessionID] ?? []
-      draft.permission[permission.sessionID] = permissions
-      const result = Binary.search(permissions, permission.id, (p) => p.id)
+      const next = [...permissions]
+      const result = Binary.search(next, permission.id, (p) => p.id)
       if (result.found) {
-        permissions[result.index] = permission
+        next[result.index] = permission
       } else {
-        permissions.splice(result.index, 0, permission)
+        next.splice(result.index, 0, permission)
       }
+      draft.permission[permission.sessionID] = next
       return true
     }
 
@@ -416,7 +417,9 @@ export function applyDirectoryEvent(
       if (!permissions) return false
       const result = Binary.search(permissions, props.requestID, (p) => p.id)
       if (result.found) {
-        permissions.splice(result.index, 1)
+        const next = [...permissions]
+        next.splice(result.index, 1)
+        draft.permission[props.sessionID] = next
         return true
       }
       return false
@@ -425,13 +428,14 @@ export function applyDirectoryEvent(
     case "question.asked": {
       const question = event.properties as QuestionRequest
       const questions = draft.question[question.sessionID] ?? []
-      draft.question[question.sessionID] = questions
-      const result = Binary.search(questions, question.id, (q) => q.id)
+      const next = [...questions]
+      const result = Binary.search(next, question.id, (q) => q.id)
       if (result.found) {
-        questions[result.index] = question
+        next[result.index] = question
       } else {
-        questions.splice(result.index, 0, question)
+        next.splice(result.index, 0, question)
       }
+      draft.question[question.sessionID] = next
       return true
     }
 
@@ -442,7 +446,9 @@ export function applyDirectoryEvent(
       if (!questions) return false
       const result = Binary.search(questions, props.requestID, (q) => q.id)
       if (result.found) {
-        questions.splice(result.index, 1)
+        const next = [...questions]
+        next.splice(result.index, 1)
+        draft.question[props.sessionID] = next
         return true
       }
       return false