diff --git a/pkg/inventory/constants.go b/api/inventory/constants.go
similarity index 100%
rename from pkg/inventory/constants.go
rename to api/inventory/constants.go
diff --git a/pkg/inventory/inventory.go b/api/inventory/inventory.go
similarity index 100%
rename from pkg/inventory/inventory.go
rename to api/inventory/inventory.go
diff --git a/pkg/inventory/inventory_test.go b/api/inventory/inventory_test.go
similarity index 70%
rename from pkg/inventory/inventory_test.go
rename to api/inventory/inventory_test.go
index 6f1700896..9b8a423a7 100644
--- a/pkg/inventory/inventory_test.go
+++ b/api/inventory/inventory_test.go
@@ -1,24 +1,12 @@
-/*
-Copyright 2019 The Kubernetes Authors.
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
 
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-package inventory
+package inventory_test
 
 import (
 	"testing"
 
+	. "sigs.k8s.io/kustomize/v3/api/inventory"
 	"sigs.k8s.io/kustomize/v3/api/resid"
 )
 
diff --git a/plugin/builtin/InventoryTransformer.go b/plugin/builtin/InventoryTransformer.go
index 486fbb79f..32edf52df 100644
--- a/plugin/builtin/InventoryTransformer.go
+++ b/plugin/builtin/InventoryTransformer.go
@@ -5,12 +5,12 @@ import (
 	"fmt"
 
 	"sigs.k8s.io/kustomize/v3/api/hasher"
+	"sigs.k8s.io/kustomize/v3/api/inventory"
 	"sigs.k8s.io/kustomize/v3/api/kv"
 	"sigs.k8s.io/kustomize/v3/api/resid"
 	"sigs.k8s.io/kustomize/v3/api/resmap"
 	"sigs.k8s.io/kustomize/v3/api/resource"
 	"sigs.k8s.io/kustomize/v3/api/types"
-	"sigs.k8s.io/kustomize/v3/pkg/inventory"
 	"sigs.k8s.io/yaml"
 )
 
diff --git a/plugin/builtin/inventorytransformer/InventoryTransformer.go b/plugin/builtin/inventorytransformer/InventoryTransformer.go
index f15bf5980..f5c4217a5 100644
--- a/plugin/builtin/inventorytransformer/InventoryTransformer.go
+++ b/plugin/builtin/inventorytransformer/InventoryTransformer.go
@@ -8,12 +8,12 @@ import (
 	"fmt"
 
 	"sigs.k8s.io/kustomize/v3/api/hasher"
+	"sigs.k8s.io/kustomize/v3/api/inventory"
 	"sigs.k8s.io/kustomize/v3/api/kv"
 	"sigs.k8s.io/kustomize/v3/api/resid"
 	"sigs.k8s.io/kustomize/v3/api/resmap"
 	"sigs.k8s.io/kustomize/v3/api/resource"
 	"sigs.k8s.io/kustomize/v3/api/types"
-	"sigs.k8s.io/kustomize/v3/pkg/inventory"
 	"sigs.k8s.io/yaml"
 )