diff --git a/apps/ai-game-creator-shell/src/features/project-workspace/ProjectSupervisorView.tsx b/apps/ai-game-creator-shell/src/features/project-workspace/ProjectSupervisorView.tsx
index bdbcc92df..e50ee4028 100644
--- a/apps/ai-game-creator-shell/src/features/project-workspace/ProjectSupervisorView.tsx
+++ b/apps/ai-game-creator-shell/src/features/project-workspace/ProjectSupervisorView.tsx
@@ -381,10 +381,38 @@ export function ProjectSupervisorView({
    */
   const renderLiveStream = (liveText: string, calls: typeof liveToolCalls) => {
     const offsets = directToolTextOffsets[liveToolCallTurnId] ?? {};
+    /**
+     * 把切分点吸附到句子边界：工具事件与文本增量是交替到达的，直接按"当时的长度"切
+     * 会把句子切碎（历史上出现过"我来做一次轻｜量｜的"这种）。这里向后找最近的
+     * 句末标点或换行，同一句里的多个工具因此落到同一个切点、自动合并成一块。
+     */
+    const snapToBoundary = (source: string, index: number) => {
+      const start = Math.max(0, Math.min(index, source.length));
+      const limit = Math.min(source.length, start + 200);
+      for (let cursor = start; cursor < limit; cursor += 1) {
+        const char = source[cursor];
+        if (char === '\n') {
+          return cursor + 1;
+        }
+        if ('。！？；!?;'.includes(char)) {
+          return cursor + 1;
+        }
+        if (
+          char === '.' &&
+          (source[cursor + 1] === ' ' || source[cursor + 1] === undefined)
+        ) {
+          return cursor + 1;
+        }
+      }
+      return start;
+    };
     const groups = new Map<number, typeof calls>();
     for (const call of calls) {
       const offset = offsets[call.id];
-      const key = Number.isFinite(offset) ? Number(offset) : liveText.length;
+      const key = snapToBoundary(
+        liveText,
+        Number.isFinite(offset) ? Number(offset) : liveText.length,
+      );
       const bucket = groups.get(key) ?? [];
       bucket.push(call);
       groups.set(key, bucket);