pkg/manager: split off diff fuzzer functionality

Move the code to a separate pkg/manager/diff package. Split the
code into several files.

1 files changed, 23 insertions, 0 deletions

diff --git a/pkg/manager/diff/manager_test.go b/pkg/manager/diff/manager_test.go
new file mode 100644
index 000000000..7769fc8fd
--- /dev/null
+++ b/pkg/manager/diff/manager_test.go
@@ -0,0 +1,23 @@
+// Copyright 2026 syzkaller project authors. All rights reserved.
+// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
+
+package diff
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestNeedReproForTitle(t *testing.T) {
+	for title, skip := range map[string]bool{
+		"no output from test machine":                          false,
+		"SYZFAIL: read failed":                                 false,
+		"lost connection to test machine":                      false,
+		"INFO: rcu detected stall in clone":                    false,
+		"WARNING in arch_install_hw_breakpoint":                true,
+		"KASAN: slab-out-of-bounds Write in __bpf_get_stackid": true,
+	} {
+		assert.Equal(t, skip, needReproForTitle(title), "title=%q", title)
+	}
+}