diff --git a/pep_sphinx_extensions/pep_zero_generator/constants.py b/pep_sphinx_extensions/pep_zero_generator/constants.py
index 5b3ea5f6f91..217213def7d 100644
--- a/pep_sphinx_extensions/pep_zero_generator/constants.py
+++ b/pep_sphinx_extensions/pep_zero_generator/constants.py
@@ -1,4 +1,4 @@
-"""Holds type and status constants for PEP 0 generation."""
+"""Holds constants for PEP index generation."""
 
 STATUS_ACCEPTED = "Accepted"
 STATUS_ACTIVE = "Active"
@@ -32,3 +32,6 @@
 TYPE_VALUES = {TYPE_STANDARDS, TYPE_INFO, TYPE_PROCESS}
 # Active PEPs can only be for Informational or Process PEPs.
 ACTIVE_ALLOWED = {TYPE_PROCESS, TYPE_INFO}
+
+# Valid values for the Track header.
+TRACK_VALUES = {"Packaging"}
diff --git a/pep_sphinx_extensions/pep_zero_generator/parser.py b/pep_sphinx_extensions/pep_zero_generator/parser.py
index e2d630130a8..66d28fcfe28 100644
--- a/pep_sphinx_extensions/pep_zero_generator/parser.py
+++ b/pep_sphinx_extensions/pep_zero_generator/parser.py
@@ -15,6 +15,7 @@
 from pep_sphinx_extensions.pep_zero_generator.constants import STATUS_ACTIVE
 from pep_sphinx_extensions.pep_zero_generator.constants import STATUS_PROVISIONAL
 from pep_sphinx_extensions.pep_zero_generator.constants import STATUS_VALUES
+from pep_sphinx_extensions.pep_zero_generator.constants import TRACK_VALUES
 from pep_sphinx_extensions.pep_zero_generator.constants import TYPE_STANDARDS
 from pep_sphinx_extensions.pep_zero_generator.constants import TYPE_VALUES
 from pep_sphinx_extensions.pep_zero_generator.errors import PEPError
@@ -70,6 +71,12 @@ def __init__(self, filename: Path, authors_overrides: dict):
         if self.pep_type not in TYPE_VALUES:
             _raise_pep_error(self, f"{self.pep_type} is not a valid Type value", pep_num=True)
 
+        # Track
+        track = metadata["Track"]
+        if track is not None and track not in TRACK_VALUES:
+            _raise_pep_error(self, f"{track} is not a valid Track value", pep_num=True)
+        self.track: str | None = track
+
         # Status
         status = metadata["Status"]
         if status in SPECIAL_STATUSES:
diff --git a/pep_sphinx_extensions/pep_zero_generator/pep_index_generator.py b/pep_sphinx_extensions/pep_zero_generator/pep_index_generator.py
index 27732e43f17..d9b14d0b26c 100644
--- a/pep_sphinx_extensions/pep_zero_generator/pep_index_generator.py
+++ b/pep_sphinx_extensions/pep_zero_generator/pep_index_generator.py
@@ -32,11 +32,13 @@
 
 
 def create_pep_json(peps: list[parser.PEP]) -> str:
+    assert sorted(peps) == peps
     pep_dict = {
         pep.number: {
             "title": pep.title,
             "authors": ", ".join(pep.authors.nick for pep.authors in pep.authors),
             "discussions_to": pep.discussions_to,
+            "track": pep.track,
             "status": pep.status,
             "type": pep.pep_type,
             "created": pep.created,
@@ -48,7 +50,7 @@ def create_pep_json(peps: list[parser.PEP]) -> str:
             "superseded_by": pep.superseded_by,
             "url": f"https://peps.python.org/pep-{pep.number:0>4}/",
         }
-        for pep in sorted(peps)
+        for pep in peps
     }
     return json.dumps(pep_dict, indent=1)
 
@@ -76,8 +78,9 @@ def create_pep_zero(app: Sphinx, env: BuildEnvironment, docnames: list[str]) ->
         if pep_pat.match(str(file_path)) and file_path.suffix in {".txt", ".rst"}:
             pep = parser.PEP(path.joinpath(file_path).absolute(), authors_overrides)
             peps.append(pep)
+    peps.sort()
 
-    pep0_text = writer.PEPZeroWriter().write_pep0(sorted(peps))
+    pep0_text = writer.PEPZeroWriter().write_pep0(peps)
     Path(f"{pep_zero_filename}.rst").write_text(pep0_text, encoding="utf-8")
 
     # Add to files for builder
diff --git a/pep_sphinx_extensions/pep_zero_generator/writer.py b/pep_sphinx_extensions/pep_zero_generator/writer.py
index 822bd02fdc4..d888feb2a1c 100644
--- a/pep_sphinx_extensions/pep_zero_generator/writer.py
+++ b/pep_sphinx_extensions/pep_zero_generator/writer.py
@@ -113,6 +113,7 @@ def emit_pep_category(self, category: str, peps: list[PEP]) -> None:
         self.emit_newline()
 
     def write_pep0(self, peps: list[PEP]):
+        assert sorted(peps) == peps
 
         # PEP metadata
         self.emit_text(header)