From b2ca764959a7f213b0d1d8b534c3f4d66e34285e Mon Sep 17 00:00:00 2001
From: Runxi Yu
Date: Fri, 20 Feb 2026 12:49:48 +0800
Subject: Revert "packed: Use random delta seed"

This reverts commit 26ae77e8f63111bba3dd4e92ffcaccaa76570927.
---
 packed_write_pack.go | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/packed_write_pack.go b/packed_write_pack.go
index 81c8399d..f31f42d1 100644
--- a/packed_write_pack.go
+++ b/packed_write_pack.go
@@ -1,7 +1,8 @@
 package furgit
 
 import (
-	"crypto/rand"
+	"crypto/sha1"
+	"crypto/sha256"
 	"encoding/binary"
 	"errors"
 	"hash"
@@ -306,15 +307,10 @@ func (repo *Repository) packWrite(w io.Writer, objects []Hash, opts packWriteOpt
 	}
 
 	var dctx deltaContext
-	var deltaSeed uint32
 	if opts.EnableDeltas {
 		dctx.window = defaultDeltaWindow
-		var seedBytes [4]byte
-		if _, err := rand.Read(seedBytes[:]); err != nil {
-			return Hash{}, err
-		}
-		deltaSeed = binary.LittleEndian.Uint32(seedBytes[:])
 	}
+	deltaSeed := uint32(0)
 
 	for _, id := range objects {
 		ty, body, err := repo.ReadObjectTypeRaw(id)
-- 
cgit v1.3.1-10-gc9f91