fix: preserve Windows plan paths

Author: OutisLi

skills/deepmd-install/scripts/validate_plan.py

@@ -8,6 +8,7 @@
 
 import argparse
 import json
+import os
 import re
 from pathlib import (
     Path,
@@ -156,7 +157,8 @@ def _validate_strings(value: object, path: str, errors: list[str]) -> None:
             errors.append(f"{path}: unresolved shell variable is not allowed")
         if re.search(r"<[^<>\r\n]+>", value):
             errors.append(f"{path}: unresolved placeholder is not allowed")
-        if any(character in value for character in ('"', "`", "\\")):
+        unsafe_characters = ('"', "`") + (("\\",) if os.name != "nt" else ())
+        if any(character in value for character in unsafe_characters):
             errors.append(f"{path}: unsafe shell-template character is not allowed")
         if any(character in value for character in ("\0", "\n", "\r")):
             errors.append(f"{path}: control character is not allowed")

source/tests/test_deepmd_install_skill.py

@@ -325,6 +325,16 @@ def test_validate_plan_keeps_quoted_semicolon_as_data() -> None:
     assert PLAN.validate_plan(plan) == []
 
 
+def test_validate_plan_allows_windows_path_separator_on_windows(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    """Preserve Windows paths while keeping POSIX backslash escaping blocked."""
+    errors: list[str] = []
+    monkeypatch.setattr(PLAN.os, "name", "nt")
+    PLAN._validate_strings(r"C:\DeePMD\python.exe", "environment.python", errors)
+    assert errors == []
+
+
 @pytest.mark.parametrize(
     ("field", "value"),
     [