diff --git a/frontend/src/hooks/use-iframe-skill.ts b/frontend/src/hooks/use-iframe-skill.ts
index 00b72379..bf4fcf82 100644
--- a/frontend/src/hooks/use-iframe-skill.ts
+++ b/frontend/src/hooks/use-iframe-skill.ts
@@ -103,39 +103,39 @@ export function useIframeSkill(
         return next;
       });
 
-      // 2) 回滚 localStorage（latest + thread）
+      // 2) 回滚 sessionStorage（latest + thread）
       const latestSkills = parseStoredSkills(
-        window.localStorage.getItem(STORAGE_KEYS.latest),
+        window.sessionStorage.getItem(STORAGE_KEYS.latest),
       );
       const nextLatestSkills = removeSkillsByIdsFromList(
         latestSkills,
         skillIds,
       );
       if (nextLatestSkills.length > 0) {
-        window.localStorage.setItem(
+        window.sessionStorage.setItem(
           STORAGE_KEYS.latest,
           JSON.stringify(nextLatestSkills),
         );
       } else {
-        window.localStorage.removeItem(STORAGE_KEYS.latest);
+        window.sessionStorage.removeItem(STORAGE_KEYS.latest);
       }
 
       const threadKey = getThreadStorageKey(threadId);
       if (threadKey) {
         const threadSkills = parseStoredSkills(
-          window.localStorage.getItem(threadKey),
+          window.sessionStorage.getItem(threadKey),
         );
         const nextThreadSkills = removeSkillsByIdsFromList(
           threadSkills,
           skillIds,
         );
         if (nextThreadSkills.length > 0) {
-          window.localStorage.setItem(
+          window.sessionStorage.setItem(
             threadKey,
             JSON.stringify(nextThreadSkills),
           );
         } else {
-          window.localStorage.removeItem(threadKey);
+          window.sessionStorage.removeItem(threadKey);
         }
       }
     },
@@ -196,38 +196,39 @@ export function useIframeSkill(
     return () => window.removeEventListener("message", handleMessage);
   }, []);
 
-  // 3. 首次进入时恢复 localStorage 中上次选择的 skill（线程优先，其次全局）
-  useEffect(() => {
-    const threadKey = getThreadStorageKey(threadId);
-    const threadSkills = threadKey
-      ? parseStoredSkills(window.localStorage.getItem(threadKey))
-      : [];
-    const latestSkills = parseStoredSkills(
-      window.localStorage.getItem(STORAGE_KEYS.latest),
-    );
-    const restoredSkills =
-      threadSkills.length > 0 ? threadSkills : latestSkills;
-    if (restoredSkills.length === 0) return;
-    setSelectedSkills(restoredSkills);
-    setSelectedSkill(restoredSkills[0] ?? null);
-  }, [threadId]);
+  // 3. 首次进入时恢复 sessionStorage 中上次选择的 skill（线程优先，其次全局）
+  // 已按需求注释：关闭页签后重新打开时，不再从 sessionStorage 自动恢复。
+  // useEffect(() => {
+  //   const threadKey = getThreadStorageKey(threadId);
+  //   const threadSkills = threadKey
+  //     ? parseStoredSkills(window.sessionStorage.getItem(threadKey))
+  //     : [];
+  //   const latestSkills = parseStoredSkills(
+  //     window.sessionStorage.getItem(STORAGE_KEYS.latest),
+  //   );
+  //   const restoredSkills =
+  //     threadSkills.length > 0 ? threadSkills : latestSkills;
+  //   if (restoredSkills.length === 0) return;
+  //   setSelectedSkills(restoredSkills);
+  //   setSelectedSkill(restoredSkills[0] ?? null);
+  // }, [threadId]);
 
-  // 4. 选择变化时同步到 localStorage
+  // 4. 选择变化时同步到 sessionStorage
   useEffect(() => {
     const threadKey = getThreadStorageKey(threadId);
     if (selectedSkills.length === 0) {
       // 空数组也要同步到存储，避免 UI 状态与缓存不一致
-      window.localStorage.removeItem(STORAGE_KEYS.latest);
+      window.sessionStorage.removeItem(STORAGE_KEYS.latest);
       if (threadKey) {
-        window.localStorage.removeItem(threadKey);
+        window.sessionStorage.removeItem(threadKey);
       }
       return;
     }
 
     const payload = JSON.stringify(selectedSkills);
-    window.localStorage.setItem(STORAGE_KEYS.latest, payload);
+    window.sessionStorage.setItem(STORAGE_KEYS.latest, payload);
     if (threadKey) {
-      window.localStorage.setItem(threadKey, payload);
+      window.sessionStorage.setItem(threadKey, payload);
     }
   }, [selectedSkills, threadId]);
 
@@ -359,30 +360,30 @@ export function useIframeSkill(
 
       // 同步 latest 缓存：仅删除对应 skill（或全部清空）
       const latestSkills = parseStoredSkills(
-        window.localStorage.getItem(STORAGE_KEYS.latest),
+        window.sessionStorage.getItem(STORAGE_KEYS.latest),
       );
       const nextLatestSkills = removeAll
         ? []
         : latestSkills.filter((skill) => skill.skill_id !== String(skillId));
       if (nextLatestSkills.length > 0) {
-        window.localStorage.setItem(
+        window.sessionStorage.setItem(
           STORAGE_KEYS.latest,
           JSON.stringify(nextLatestSkills),
         );
       } else {
-        window.localStorage.removeItem(STORAGE_KEYS.latest);
+        window.sessionStorage.removeItem(STORAGE_KEYS.latest);
       }
 
       // 同步线程缓存：保存剩余数组，空则删除 key
       const threadKey = getThreadStorageKey(threadId);
       if (threadKey) {
         if (nextSelectedSkills.length > 0) {
-          window.localStorage.setItem(
+          window.sessionStorage.setItem(
             threadKey,
             JSON.stringify(nextSelectedSkills),
           );
         } else {
-          window.localStorage.removeItem(threadKey);
+          window.sessionStorage.removeItem(threadKey);
         }
       }