docs(pathfinder): address review feedback

Use the requested fully-isolated subprocess wording, restore the historical 1.4.0 release note text, and add new 1.4.3 release notes for the script-safety and import-root fixes instead.

Made-with: Cursor

Author: cpcloud

cuda_pathfinder/cuda/pathfinder/_headers/find_nvidia_headers.py

@@ -115,7 +115,7 @@ def find_via_ctk_root_canary(desc: HeaderDescriptor) -> LocatedHeaderDir | None:
     """Try CTK header lookup via CTK-root canary probing.
 
     Skips immediately if the descriptor does not opt in (``use_ctk_root_canary``).
-    Otherwise, system-loads ``cudart`` in a dedicated Python subprocess, derives
+    Otherwise, system-loads ``cudart`` in a fully isolated Python subprocess, derives
     CTK root from the resolved library path, and searches the expected include
     layout under that root.
     """

cuda_pathfinder/docs/source/release/1.4.0-notes.rst

@@ -12,8 +12,8 @@ Highlights
 ----------
 
 * Add CTK root canary probing for non-standard-path libraries in
-  ``load_nvidia_dynamic_lib()`` (notably ``nvvm``), including dedicated
-  subprocess isolation for the canary probe.
+  ``load_nvidia_dynamic_lib()`` (notably ``nvvm``), including spawned child
+  process isolation for the canary probe.
   (`PR #1595 <https://github.com/NVIDIA/cuda-python/pull/1595>`_)
 
 * Restore backward-compatible exception behavior for

cuda_pathfinder/docs/source/release/1.4.3-notes.rst

@@ -0,0 +1,22 @@
+.. SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+.. SPDX-License-Identifier: Apache-2.0
+
+.. py:currentmodule:: cuda.pathfinder
+
+``cuda-pathfinder`` 1.4.3 Release notes
+=======================================
+
+Highlights
+----------
+
+* Fix CTK canary probing when it is reached from plain Python scripts that do
+  not use an ``if __name__ == "__main__"`` guard. The canary now runs in a
+  fully isolated Python subprocess without re-entering the caller's script
+  during child-process startup.
+  (`PR #1768 <https://github.com/NVIDIA/cuda-python/pull/1768>`_)
+
+* Make the canary subprocess resolve ``cuda.pathfinder`` from the same import
+  root as the parent process. This avoids mixed source-tree versus wheel imports
+  in wheel-based test environments and keeps the probe behavior consistent
+  across source and installed-package workflows.
+  (`PR #1768 <https://github.com/NVIDIA/cuda-python/pull/1768>`_)