diff --git a/docs/design/25-gitea-mention-toolchain.md b/docs/design/25-gitea-mention-toolchain.md
index 22032bb..3af474b 100644
--- a/docs/design/25-gitea-mention-toolchain.md
+++ b/docs/design/25-gitea-mention-toolchain.md
@@ -341,8 +341,8 @@ def infer_intent(body: str, context: str = "") -> str:
     if any(kw in body for kw in assign_keywords):
         return "assign"
 
-    # 求助关键词
-    help_keywords = ["怎么", "如何", "？", "?", "什么", "哪个", "能否", "帮忙"]
+    # 求助关键词（"帮忙"已由 assign_keywords 的"帮忙做"覆盖，"请帮忙"由 collab_keywords 覆盖）
+    help_keywords = ["怎么", "如何", "？", "?", "什么", "哪个", "能否"]
     if any(kw in body for kw in help_keywords):
         return "help"