diff --git a/api/openapi-spec/swagger.json b/api/openapi-spec/swagger.json
index 3c9f697be..9334b6529 100644
--- a/api/openapi-spec/swagger.json
+++ b/api/openapi-spec/swagger.json
@@ -5946,6 +5946,13 @@
         "os": {
           "type": "string"
         },
+        "signaturePaths": {
+          "type": "array",
+          "items": {
+            "default": {},
+            "$ref": "#/definitions/kpack.build.v1alpha2.CosignSignature"
+          }
+        },
         "stack": {
           "default": {},
           "$ref": "#/definitions/kpack.core.v1alpha1.BuildStack"
@@ -6193,13 +6200,11 @@
     "kpack.build.v1alpha2.ClusterBuildpackSpec": {
       "type": "object",
       "properties": {
+        "image": {
+          "type": "string"
+        },
         "serviceAccountRef": {
           "$ref": "#/definitions/io.k8s.api.core.v1.ObjectReference"
-        },
-        "source": {
-          "default": {},
-          "x-kubernetes-list-type": "",
-          "$ref": "#/definitions/kpack.core.v1alpha1.ImageSource"
         }
       }
     },
@@ -6498,6 +6503,23 @@
         }
       }
     },
+    "kpack.build.v1alpha2.CosignSignature": {
+      "type": "object",
+      "required": [
+        "signingSecret",
+        "targetDigest"
+      ],
+      "properties": {
+        "signingSecret": {
+          "type": "string",
+          "default": ""
+        },
+        "targetDigest": {
+          "type": "string",
+          "default": ""
+        }
+      }
+    },
     "kpack.build.v1alpha2.Image": {
       "type": "object",
       "required": [
@@ -7193,6 +7215,9 @@
         "revision"
       ],
       "properties": {
+        "initializeSubmodules": {
+          "type": "boolean"
+        },
         "revision": {
           "type": "string",
           "default": ""
@@ -7310,6 +7335,9 @@
         "type"
       ],
       "properties": {
+        "initializeSubmodules": {
+          "type": "boolean"
+        },
         "revision": {
           "type": "string",
           "default": ""
diff --git a/pkg/openapi/openapi_generated.go b/pkg/openapi/openapi_generated.go
index 341644396..c585658c9 100644
--- a/pkg/openapi/openapi_generated.go
+++ b/pkg/openapi/openapi_generated.go
@@ -101,6 +101,7 @@ func GetOpenAPIDefinitions(ref common.ReferenceCallback) map[string]common.OpenA
 		"github.com/pivotal/kpack/pkg/apis/build/v1alpha2.ClusterStoreStatus":         schema_pkg_apis_build_v1alpha2_ClusterStoreStatus(ref),
 		"github.com/pivotal/kpack/pkg/apis/build/v1alpha2.CosignAnnotation":           schema_pkg_apis_build_v1alpha2_CosignAnnotation(ref),
 		"github.com/pivotal/kpack/pkg/apis/build/v1alpha2.CosignConfig":               schema_pkg_apis_build_v1alpha2_CosignConfig(ref),
+		"github.com/pivotal/kpack/pkg/apis/build/v1alpha2.CosignSignature":            schema_pkg_apis_build_v1alpha2_CosignSignature(ref),
 		"github.com/pivotal/kpack/pkg/apis/build/v1alpha2.Image":                      schema_pkg_apis_build_v1alpha2_Image(ref),
 		"github.com/pivotal/kpack/pkg/apis/build/v1alpha2.ImageBuild":                 schema_pkg_apis_build_v1alpha2_ImageBuild(ref),
 		"github.com/pivotal/kpack/pkg/apis/build/v1alpha2.ImageBuilder":               schema_pkg_apis_build_v1alpha2_ImageBuilder(ref),
@@ -2799,11 +2800,24 @@ func schema_pkg_apis_build_v1alpha2_BuilderStatus(ref common.ReferenceCallback)
 							Format: "",
 						},
 					},
+					"signaturePaths": {
+						SchemaProps: spec.SchemaProps{
+							Type: []string{"array"},
+							Items: &spec.SchemaOrArray{
+								Schema: &spec.Schema{
+									SchemaProps: spec.SchemaProps{
+										Default: map[string]interface{}{},
+										Ref:     ref("github.com/pivotal/kpack/pkg/apis/build/v1alpha2.CosignSignature"),
+									},
+								},
+							},
+						},
+					},
 				},
 			},
 		},
 		Dependencies: []string{
-			"github.com/pivotal/kpack/pkg/apis/core/v1alpha1.BuildStack", "github.com/pivotal/kpack/pkg/apis/core/v1alpha1.BuildpackMetadata", "github.com/pivotal/kpack/pkg/apis/core/v1alpha1.Condition", "github.com/pivotal/kpack/pkg/apis/core/v1alpha1.OrderEntry"},
+			"github.com/pivotal/kpack/pkg/apis/build/v1alpha2.CosignSignature", "github.com/pivotal/kpack/pkg/apis/core/v1alpha1.BuildStack", "github.com/pivotal/kpack/pkg/apis/core/v1alpha1.BuildpackMetadata", "github.com/pivotal/kpack/pkg/apis/core/v1alpha1.Condition", "github.com/pivotal/kpack/pkg/apis/core/v1alpha1.OrderEntry"},
 	}
 }
 
@@ -3237,15 +3251,10 @@ func schema_pkg_apis_build_v1alpha2_ClusterBuildpackSpec(ref common.ReferenceCal
 			SchemaProps: spec.SchemaProps{
 				Type: []string{"object"},
 				Properties: map[string]spec.Schema{
-					"source": {
-						VendorExtensible: spec.VendorExtensible{
-							Extensions: spec.Extensions{
-								"x-kubernetes-list-type": "",
-							},
-						},
+					"image": {
 						SchemaProps: spec.SchemaProps{
-							Default: map[string]interface{}{},
-							Ref:     ref("github.com/pivotal/kpack/pkg/apis/core/v1alpha1.ImageSource"),
+							Type:   []string{"string"},
+							Format: "",
 						},
 					},
 					"serviceAccountRef": {
@@ -3257,7 +3266,7 @@ func schema_pkg_apis_build_v1alpha2_ClusterBuildpackSpec(ref common.ReferenceCal
 			},
 		},
 		Dependencies: []string{
-			"github.com/pivotal/kpack/pkg/apis/core/v1alpha1.ImageSource", "k8s.io/api/core/v1.ObjectReference"},
+			"k8s.io/api/core/v1.ObjectReference"},
 	}
 }
 
@@ -3831,6 +3840,33 @@ func schema_pkg_apis_build_v1alpha2_CosignConfig(ref common.ReferenceCallback) c
 	}
 }
 
+func schema_pkg_apis_build_v1alpha2_CosignSignature(ref common.ReferenceCallback) common.OpenAPIDefinition {
+	return common.OpenAPIDefinition{
+		Schema: spec.Schema{
+			SchemaProps: spec.SchemaProps{
+				Type: []string{"object"},
+				Properties: map[string]spec.Schema{
+					"signingSecret": {
+						SchemaProps: spec.SchemaProps{
+							Default: "",
+							Type:    []string{"string"},
+							Format:  "",
+						},
+					},
+					"targetDigest": {
+						SchemaProps: spec.SchemaProps{
+							Default: "",
+							Type:    []string{"string"},
+							Format:  "",
+						},
+					},
+				},
+				Required: []string{"signingSecret", "targetDigest"},
+			},
+		},
+	}
+}
+
 func schema_pkg_apis_build_v1alpha2_Image(ref common.ReferenceCallback) common.OpenAPIDefinition {
 	return common.OpenAPIDefinition{
 		Schema: spec.Schema{
@@ -5149,6 +5185,12 @@ func schema_pkg_apis_core_v1alpha1_Git(ref common.ReferenceCallback) common.Open
 							Format:  "",
 						},
 					},
+					"initializeSubmodules": {
+						SchemaProps: spec.SchemaProps{
+							Type:   []string{"boolean"},
+							Format: "",
+						},
+					},
 				},
 				Required: []string{"url", "revision"},
 			},
@@ -5380,6 +5422,12 @@ func schema_pkg_apis_core_v1alpha1_ResolvedGitSource(ref common.ReferenceCallbac
 							Format:  "",
 						},
 					},
+					"initializeSubmodules": {
+						SchemaProps: spec.SchemaProps{
+							Type:   []string{"boolean"},
+							Format: "",
+						},
+					},
 				},
 				Required: []string{"url", "revision", "type"},
 			},