From 42cdcaa9a0d6d7ed6c776520f646d110ebf641dc Mon Sep 17 00:00:00 2001
From: Runxi Yu
Date: Wed, 10 Jun 2026 18:28:02 +0000
Subject: internal/format/packfile: Add simple header functions

---
 internal/format/packfile/doc.go    | 2 ++
 internal/format/packfile/header.go | 9 +++++++++
 2 files changed, 11 insertions(+)
 create mode 100644 internal/format/packfile/doc.go
 create mode 100644 internal/format/packfile/header.go

(limited to 'internal')

diff --git a/internal/format/packfile/doc.go b/internal/format/packfile/doc.go
new file mode 100644
index 00000000..d656e256
--- /dev/null
+++ b/internal/format/packfile/doc.go
@@ -0,0 +1,2 @@
+// Package packfile provides Git packfile format parsing primitives.
+package packfile
diff --git a/internal/format/packfile/header.go b/internal/format/packfile/header.go
new file mode 100644
index 00000000..1a156f36
--- /dev/null
+++ b/internal/format/packfile/header.go
@@ -0,0 +1,9 @@
+package packfile
+
+// Signature is the 4-byte "PACK" magic at the start of pack files.
+const Signature = 0x5041434b
+
+// SupportedVersion reports whether a pack version is supported.
+func SupportedVersion(version uint32) bool {
+	return version == 2
+}
-- 
cgit v1.3.1-10-gc9f91