From e15054a4f93fc54806e84aa7036e60168e78e823 Mon Sep 17 00:00:00 2001
From: Runxi Yu
Date: Fri, 6 Mar 2026 08:05:51 +0800
Subject: format/commitgraph: Add initial commit-graph support

---
 format/commitgraph/reader.go | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 format/commitgraph/reader.go

(limited to 'format/commitgraph/reader.go')

diff --git a/format/commitgraph/reader.go b/format/commitgraph/reader.go
new file mode 100644
index 00000000..b7af3282
--- /dev/null
+++ b/format/commitgraph/reader.go
@@ -0,0 +1,14 @@
+package commitgraph
+
+import "codeberg.org/lindenii/furgit/objectid"
+
+// Reader provides read-only access to one mmap-backed commit-graph snapshot.
+//
+// It is safe for concurrent read-only queries.
+type Reader struct {
+	algo        objectid.Algorithm
+	hashVersion uint8
+
+	layers []layer
+	total  uint32
+}
-- 
cgit v1.3.1-10-gc9f91