5 files changed, 11 insertions, 27 deletions
diff --git a/refstore/chain/chain.go b/refstore/chain/chain.go
index 882d4b56..0feb97c3 100644
--- a/refstore/chain/chain.go
+++ b/refstore/chain/chain.go
@@ -5,6 +5,8 @@ package chain
 import "codeberg.org/lindenii/furgit/refstore"
 
 // Chain queries multiple reference stores in order.
+//
+// Chain borrows its backend stores.
 type Chain struct {
 	backends []refstore.ReadingStore
 }
diff --git a/refstore/chain/close.go b/refstore/chain/close.go
index 440afb10..6bd74565 100644
--- a/refstore/chain/close.go
+++ b/refstore/chain/close.go
@@ -1,21 +1,8 @@
 package chain
 
-import "errors"
-
-// Close closes all backends and joins close errors.
-func (chain *Chain) Close() error {
-	var errs []error
-
-	for _, backend := range chain.backends {
-		if backend == nil {
-			continue
-		}
-
-		err := backend.Close()
-		if err != nil {
-			errs = append(errs, err)
-		}
-	}
-
-	return errors.Join(errs...)
-}
+// Close releases wrapper-local resources.
+//
+// Chain borrows its backends, so Close does not close them.
+//
+// Repeated calls to Close are undefined behavior.
+func (chain *Chain) Close() error { return nil }
diff --git a/refstore/chain/list.go b/refstore/chain/list.go
index e1594e95..c577ca85 100644
--- a/refstore/chain/list.go
+++ b/refstore/chain/list.go
@@ -15,10 +15,6 @@ func (chain *Chain) List(pattern string) ([]ref.Ref, error) {
 	seen := map[string]struct{}{}
 
 	for i, backend := range chain.backends {
-		if backend == nil {
-			continue
-		}
-
 		listed, err := backend.List(pattern)
 		if err != nil {
 			return nil, fmt.Errorf("refstore: backend %d list: %w", i, err)
diff --git a/refstore/chain/new.go b/refstore/chain/new.go
index ebf5e2bb..f8bdcb13 100644
--- a/refstore/chain/new.go
+++ b/refstore/chain/new.go
@@ -3,6 +3,9 @@ package chain
 import "codeberg.org/lindenii/furgit/refstore"
 
 // New creates an ordered reference store chain.
+//
+// The provided backends must be non-nil and distinct.
+// Chain borrows the provided backends and does not close them in Close.
 func New(backends ...refstore.ReadingStore) *Chain {
 	return &Chain{
 		backends: append([]refstore.ReadingStore(nil), backends...),
diff --git a/refstore/chain/resolve.go b/refstore/chain/resolve.go
index 99ada284..97dee24b 100644
--- a/refstore/chain/resolve.go
+++ b/refstore/chain/resolve.go
@@ -13,10 +13,6 @@ import (
 //nolint:ireturn
 func (chain *Chain) Resolve(name string) (ref.Ref, error) {
 	for i, backend := range chain.backends {
-		if backend == nil {
-			continue
-		}
-
 		resolved, err := backend.Resolve(name)
 		if err == nil {
 			return resolved, nil