From e2ae4d8b3c490bd5288d7befe2d26cba6126c01d Mon Sep 17 00:00:00 2001
From: wanglin <2281216234@qq.com>
Date: Sat, 3 Oct 2026 21:36:15 +0800
Subject: [PATCH] =?UTF-8?q?robustness:=20=5Fdump=5Fjson=20=E8=87=AA?=
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---
 preflight.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/preflight.py b/preflight.py
index d5a4c43..9607376 100644
--- a/preflight.py
+++ b/preflight.py
@@ -81,7 +81,15 @@ def _load_json(path):
 
 
 def _dump_json(obj, path):
+    """写 JSON 到覆盖目录；失败返回 False。
+
+    自己负责把父目录建出来（不依赖调用方先前建过）——10-03 端到端测试出现过
+    "覆盖目录建了但 tokenizer 子目录写不进去"导致 R3 静默失效，这里做成自洽。
+    """
     try:
+        parent = os.path.dirname(os.path.abspath(path))
+        if parent:
+            os.makedirs(parent, exist_ok=True)
         with open(path, "w", encoding="utf-8") as f:
             json.dump(obj, f, ensure_ascii=False, indent=1)
         return True