From 673353808b46f1e25241eec8a7f0e855de6218c4 Mon Sep 17 00:00:00 2001
From: Barry Warsaw <barry@python.org>
Date: Sun, 19 Apr 2026 14:22:37 -0700
Subject: [PATCH 1/2] Describe encoding requirements

---
 peps/pep-0829.rst | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/peps/pep-0829.rst b/peps/pep-0829.rst
index 8e0904e94e2..bbb98add7ef 100644
--- a/peps/pep-0829.rst
+++ b/peps/pep-0829.rst
@@ -215,6 +215,20 @@ continues.
    continues to the next entry point.
 
 
+Encoding
+--------
+
+``<name>.start`` files **MUST** be encoded with `utf-8-sig
+<https://docs.python.org/3.14/library/codecs.html#module-encodings.utf_8_sig>`_,
+i.e. UTF-8 with optional byte-order mark.
+
+``<name>.pth`` files **SHOULD** also be ``utf-8-sig`` encoded as well.
+Currently, decoding ``<name>.pth`` files falls back to the current locale if
+not encoded with ``utf-8-sig``, but this PEP deprecates that support for 5
+years, after which ``<name>.pth`` files **MUST** be encoded with ``utf-8-sig``
+as well.
+
+
 .. _future:
 
 Future Improvements
@@ -467,6 +481,12 @@ Open Issues
 Change History
 ==============
 
+``17-Apr-2026``
+
+* Added a description of the encoding requirements for ``<name>.start`` and
+  ``<name>.pth`` files.
+* Update the migration guidelines.
+
 `15-Apr-2026 <https://discuss.python.org/t/pep-829-structured-startup-configuration-files/106789/99>`__
 
 * During the deprecation period, warnings about ``import`` lines in

From 1b412ef1c4e09f331022d0e329fbbfc0422778c0 Mon Sep 17 00:00:00 2001
From: Barry Warsaw <barry@python.org>
Date: Sun, 19 Apr 2026 14:23:27 -0700
Subject: [PATCH 2/2] Change History date

---
 peps/pep-0829.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/peps/pep-0829.rst b/peps/pep-0829.rst
index bbb98add7ef..bf040ec815d 100644
--- a/peps/pep-0829.rst
+++ b/peps/pep-0829.rst
@@ -481,7 +481,7 @@ Open Issues
 Change History
 ==============
 
-``17-Apr-2026``
+``19-Apr-2026``
 
 * Added a description of the encoding requirements for ``<name>.start`` and
   ``<name>.pth`` files.