diff --git a/dnf/capabilities.go b/dnf/capabilities.go
index 1279004..1b8dc38 100644
--- a/dnf/capabilities.go
+++ b/dnf/capabilities.go
@@ -15,6 +15,7 @@ var (
 	_ snack.RepoManager    = (*DNF)(nil)
 	_ snack.KeyManager     = (*DNF)(nil)
 	_ snack.Grouper        = (*DNF)(nil)
+	_ snack.GroupQuerier   = (*DNF)(nil)
 	_ snack.NameNormalizer = (*DNF)(nil)
 )
 
diff --git a/dnf/parse_test.go b/dnf/parse_test.go
index 8e9dfa6..4cc9f76 100644
--- a/dnf/parse_test.go
+++ b/dnf/parse_test.go
@@ -468,5 +468,6 @@ var (
 	_ snack.RepoManager    = (*DNF)(nil)
 	_ snack.KeyManager     = (*DNF)(nil)
 	_ snack.Grouper        = (*DNF)(nil)
+	_ snack.GroupQuerier   = (*DNF)(nil)
 	_ snack.NameNormalizer = (*DNF)(nil)
 )
diff --git a/pacman/capabilities.go b/pacman/capabilities.go
index 213c0bd..d5400ad 100644
--- a/pacman/capabilities.go
+++ b/pacman/capabilities.go
@@ -12,6 +12,7 @@ var (
 	_ snack.Cleaner        = (*Pacman)(nil)
 	_ snack.FileOwner      = (*Pacman)(nil)
 	_ snack.Grouper        = (*Pacman)(nil)
+	_ snack.GroupQuerier   = (*Pacman)(nil)
 )
 
 // NOTE: snack.Holder is not implemented for pacman. While pacman supports
diff --git a/snack.go b/snack.go
index 10ba124..fea9ec2 100644
--- a/snack.go
+++ b/snack.go
@@ -186,7 +186,12 @@ type Grouper interface {
 
 	// GroupInstall installs all packages in a group.
 	GroupInstall(ctx context.Context, group string, opts ...Option) error
+}
 
+// GroupQuerier provides an efficient check for whether a package group is
+// fully installed. This is an optional extension of [Grouper].
+// Supported by: pacman, dnf/yum.
+type GroupQuerier interface {
 	// GroupIsInstalled reports whether all packages in the group are installed.
 	GroupIsInstalled(ctx context.Context, group string) (bool, error)
 }