diff --git a/src/restic/repository.go b/src/restic/repository.go
new file mode 100644
index 000000000..1fba0ded7
--- /dev/null
+++ b/src/restic/repository.go
@@ -0,0 +1,19 @@
+package restic
+
+import (
+	"restic/backend"
+	"restic/pack"
+)
+
+// Repository manages encrypted and packed data stored in a backend.
+type Repository interface {
+	LoadJSONUnpacked(backend.Type, backend.ID, interface{}) error
+
+	Lister
+}
+
+// Lister combines lists packs in a repo and blobs in a pack.
+type Lister interface {
+	List(backend.Type, <-chan struct{}) <-chan backend.ID
+	ListPack(backend.ID) ([]pack.Blob, int64, error)
+}