diff --git a/docs/design/17-toolchain-handler-enforcement.md b/docs/design/17-toolchain-handler-enforcement.md
index 70b24fb..1c6e36f 100644
--- a/docs/design/17-toolchain-handler-enforcement.md
+++ b/docs/design/17-toolchain-handler-enforcement.md
@@ -332,7 +332,7 @@ def verify_completion(self, task_id: str, db_path: Path) -> VerifyResult:
             # 3. fallback：检查有实质内容的 comment（向后兼容）
             comment_count = conn.execute(
                 "SELECT COUNT(*) FROM comments WHERE task_id=? "
-                "AND author != 'system' AND LENGTH(content) >= 20",
+                "AND author != 'system' AND LENGTH(body) >= 20",
                 (task_id,)
             ).fetchone()[0]
             if comment_count > 0: