fix(ddic): create 命令消费 JSON description（--description 优先→JSON→回退名）；upload testclasses XML 包裹通道（S4T 三轮实证）；SKILL 错误速查表 +4 条 NW740 实证（ADT 创建不持久化文本/classes 激活空响应/unknown comments/STRG+comptype 陷阱）

assets/sapcli/commands/crud.py

@@ -859,6 +859,27 @@ def cmd_create(args: argparse.Namespace, client: ADTClient) -> None:
     source_file: str | None = getattr(args, "source", None)
     definition_file: str | None = getattr(args, "definition", None)
 
+    # JSON definition description: --description wins, then JSON, then name.
+    # (NW740 ADT create does not persist texts anyway — see SKILL.md known
+    # limitation; this only affects the XML body sent at creation time.)
+    if (
+        definition_file
+        and not getattr(args, "description", None)
+        and obj_type in DDIC_TYPES
+    ):
+        import json as _json
+        import os as _os
+
+        if _os.path.isfile(definition_file):
+            try:
+                with open(definition_file, "r", encoding="utf-8") as f:
+                    _data = _json.load(f)
+                _json_desc = _data.get("description")
+                if _json_desc:
+                    description = _json_desc
+            except Exception as _e:
+                logger.warning("读取定义文件 description 失败: %s", _e)
+
     type_label = get_type_config(obj_type).label
 
     if obj_type == "function":