3 files changed, 11 insertions, 32 deletions
diff --git a/objectstore/mix/close.go b/objectstore/mix/close.go
index b30116dc..53f6cd30 100644
--- a/objectstore/mix/close.go
+++ b/objectstore/mix/close.go
@@ -1,30 +1,8 @@
 package mix
 
-import (
-	"errors"
-
-	"codeberg.org/lindenii/furgit/objectstore"
-)
-
-// Close closes all backends and joins close errors.
-func (mix *Mix) Close() error {
-	mix.mu.RLock()
-
-	backends := make([]objectstore.Store, 0, len(mix.backendNodeByStore))
-	for node := mix.backendHead; node != nil; node = node.next {
-		backends = append(backends, node.backend)
-	}
-
-	mix.mu.RUnlock()
-
-	var errs []error
-
-	for _, backend := range backends {
-		err := backend.Close()
-		if err != nil {
-			errs = append(errs, err)
-		}
-	}
-
-	return errors.Join(errs...)
-}
+// Close releases wrapper-local resources.
+//
+// Mix borrows its backends, so Close does not close them.
+//
+// Repeated calls to Close are undefined behavior.
+func (mix *Mix) Close() error { return nil }
diff --git a/objectstore/mix/mix.go b/objectstore/mix/mix.go
index e2757705..ef381b95 100644
--- a/objectstore/mix/mix.go
+++ b/objectstore/mix/mix.go
@@ -9,6 +9,8 @@ import (
 )
 
 // Mix queries multiple object databases with an MRU backend preference.
+//
+// Mix borrows its backend stores.
 type Mix struct {
 	mu sync.RWMutex
 
diff --git a/objectstore/mix/new.go b/objectstore/mix/new.go
index c6fdeeee..16c6c9eb 100644
--- a/objectstore/mix/new.go
+++ b/objectstore/mix/new.go
@@ -3,6 +3,9 @@ package mix
 import "codeberg.org/lindenii/furgit/objectstore"
 
 // New creates a Mix from backends.
+//
+// The provided backends must be non-nil and distinct.
+// Mix borrows the provided backends and does not close them in Close.
 func New(backends ...objectstore.Store) *Mix {
 	nodeByStore := make(map[objectstore.Store]*backendNode, len(backends))
 
@@ -12,10 +15,6 @@ func New(backends ...objectstore.Store) *Mix {
 	)
 
 	for _, backend := range backends {
-		if backend == nil {
-			continue
-		}
-
 		node := &backendNode{
 			backend: backend,
 			prev:    tail,