diff --git a/services/secretsmanager/oas_commit b/services/secretsmanager/oas_commit
index c08a6770d..c2d5477e1 100644
--- a/services/secretsmanager/oas_commit
+++ b/services/secretsmanager/oas_commit
@@ -1 +1 @@
-4407196dbbef4e53e6798809e856725cbc84ae05
+72f3b665150d5f27cb0acf9a30bf8645b1dcea9e
diff --git a/services/secretsmanager/v1alphaapi/client.go b/services/secretsmanager/v1alphaapi/client.go
index d19f6e19e..8e7af9497 100644
--- a/services/secretsmanager/v1alphaapi/client.go
+++ b/services/secretsmanager/v1alphaapi/client.go
@@ -461,6 +461,15 @@ func (c *APIClient) decode(v interface{}, b []byte, contentType string) (err err
 		*s = string(b)
 		return nil
 	}
+	if r, ok := v.(*io.Reader); ok {
+		*r = bytes.NewReader(b)
+		return nil
+	}
+	// Must stay before the JSON branch: json.Unmarshal would base64-decode into *[]byte.
+	if p, ok := v.(*[]byte); ok {
+		*p = b
+		return nil
+	}
 	if f, ok := v.(*os.File); ok {
 		f, err = os.CreateTemp("", "HttpClientFile")
 		if err != nil {
diff --git a/services/secretsmanager/v1alphaapi/model_add_instance_role_bindings_payload.go b/services/secretsmanager/v1alphaapi/model_add_instance_role_bindings_payload.go
index dd63a8627..8988aa19e 100644
--- a/services/secretsmanager/v1alphaapi/model_add_instance_role_bindings_payload.go
+++ b/services/secretsmanager/v1alphaapi/model_add_instance_role_bindings_payload.go
@@ -20,7 +20,7 @@ var _ MappedNullable = &AddInstanceRoleBindingsPayload{}
 
 // AddInstanceRoleBindingsPayload struct for AddInstanceRoleBindingsPayload
 type AddInstanceRoleBindingsPayload struct {
-	Role                 string `json:"role" validate:"regexp=^[a-z](?:[-.]?[a-z]){1,63}$"`
+	Role                 string `json:"role" validate:"regexp=^[a-z](?:[-.]?[a-z]){1\\,63}$"`
 	Subject              string `json:"subject"`
 	AdditionalProperties map[string]interface{}
 }
diff --git a/services/secretsmanager/v1alphaapi/model_add_secret_group_role_bindings_payload.go b/services/secretsmanager/v1alphaapi/model_add_secret_group_role_bindings_payload.go
index affc39456..11cc9379d 100644
--- a/services/secretsmanager/v1alphaapi/model_add_secret_group_role_bindings_payload.go
+++ b/services/secretsmanager/v1alphaapi/model_add_secret_group_role_bindings_payload.go
@@ -20,7 +20,7 @@ var _ MappedNullable = &AddSecretGroupRoleBindingsPayload{}
 
 // AddSecretGroupRoleBindingsPayload struct for AddSecretGroupRoleBindingsPayload
 type AddSecretGroupRoleBindingsPayload struct {
-	Role                 string `json:"role" validate:"regexp=^[a-z](?:[-.]?[a-z]){1,63}$"`
+	Role                 string `json:"role" validate:"regexp=^[a-z](?:[-.]?[a-z]){1\\,63}$"`
 	Subject              string `json:"subject"`
 	AdditionalProperties map[string]interface{}
 }
diff --git a/services/secretsmanager/v1alphaapi/model_edit_instance_role_bindings_payload.go b/services/secretsmanager/v1alphaapi/model_edit_instance_role_bindings_payload.go
index 386f33cdc..d78b400e2 100644
--- a/services/secretsmanager/v1alphaapi/model_edit_instance_role_bindings_payload.go
+++ b/services/secretsmanager/v1alphaapi/model_edit_instance_role_bindings_payload.go
@@ -20,7 +20,7 @@ var _ MappedNullable = &EditInstanceRoleBindingsPayload{}
 
 // EditInstanceRoleBindingsPayload struct for EditInstanceRoleBindingsPayload
 type EditInstanceRoleBindingsPayload struct {
-	Role                 string `json:"role" validate:"regexp=^[a-z](?:[-.]?[a-z]){1,63}$"`
+	Role                 string `json:"role" validate:"regexp=^[a-z](?:[-.]?[a-z]){1\\,63}$"`
 	Subject              string `json:"subject"`
 	AdditionalProperties map[string]interface{}
 }
diff --git a/services/secretsmanager/v1alphaapi/model_edit_secret_group_role_bindings_payload.go b/services/secretsmanager/v1alphaapi/model_edit_secret_group_role_bindings_payload.go
index 611a2324e..e7a4c74e6 100644
--- a/services/secretsmanager/v1alphaapi/model_edit_secret_group_role_bindings_payload.go
+++ b/services/secretsmanager/v1alphaapi/model_edit_secret_group_role_bindings_payload.go
@@ -20,7 +20,7 @@ var _ MappedNullable = &EditSecretGroupRoleBindingsPayload{}
 
 // EditSecretGroupRoleBindingsPayload struct for EditSecretGroupRoleBindingsPayload
 type EditSecretGroupRoleBindingsPayload struct {
-	Role                 string `json:"role" validate:"regexp=^[a-z](?:[-.]?[a-z]){1,63}$"`
+	Role                 string `json:"role" validate:"regexp=^[a-z](?:[-.]?[a-z]){1\\,63}$"`
 	Subject              string `json:"subject"`
 	AdditionalProperties map[string]interface{}
 }
diff --git a/services/secretsmanager/v1alphaapi/model_get_instance_role_bindings_payload.go b/services/secretsmanager/v1alphaapi/model_get_instance_role_bindings_payload.go
index 8397d2a48..1414b5839 100644
--- a/services/secretsmanager/v1alphaapi/model_get_instance_role_bindings_payload.go
+++ b/services/secretsmanager/v1alphaapi/model_get_instance_role_bindings_payload.go
@@ -20,7 +20,7 @@ var _ MappedNullable = &GetInstanceRoleBindingsPayload{}
 
 // GetInstanceRoleBindingsPayload struct for GetInstanceRoleBindingsPayload
 type GetInstanceRoleBindingsPayload struct {
-	Role                 string `json:"role" validate:"regexp=^[a-z](?:[-.]?[a-z]){1,63}$"`
+	Role                 string `json:"role" validate:"regexp=^[a-z](?:[-.]?[a-z]){1\\,63}$"`
 	Subject              string `json:"subject"`
 	AdditionalProperties map[string]interface{}
 }
diff --git a/services/secretsmanager/v1alphaapi/model_get_secret_group_role_bindings_payload.go b/services/secretsmanager/v1alphaapi/model_get_secret_group_role_bindings_payload.go
index f974b17cc..53a02841a 100644
--- a/services/secretsmanager/v1alphaapi/model_get_secret_group_role_bindings_payload.go
+++ b/services/secretsmanager/v1alphaapi/model_get_secret_group_role_bindings_payload.go
@@ -20,7 +20,7 @@ var _ MappedNullable = &GetSecretGroupRoleBindingsPayload{}
 
 // GetSecretGroupRoleBindingsPayload struct for GetSecretGroupRoleBindingsPayload
 type GetSecretGroupRoleBindingsPayload struct {
-	Role                 string `json:"role" validate:"regexp=^[a-z](?:[-.]?[a-z]){1,63}$"`
+	Role                 string `json:"role" validate:"regexp=^[a-z](?:[-.]?[a-z]){1\\,63}$"`
 	Subject              string `json:"subject"`
 	AdditionalProperties map[string]interface{}
 }
diff --git a/services/secretsmanager/v1alphaapi/model_remove_instance_role_bindings_payload.go b/services/secretsmanager/v1alphaapi/model_remove_instance_role_bindings_payload.go
index 4b9474ed3..e68d6bdf1 100644
--- a/services/secretsmanager/v1alphaapi/model_remove_instance_role_bindings_payload.go
+++ b/services/secretsmanager/v1alphaapi/model_remove_instance_role_bindings_payload.go
@@ -20,7 +20,7 @@ var _ MappedNullable = &RemoveInstanceRoleBindingsPayload{}
 
 // RemoveInstanceRoleBindingsPayload struct for RemoveInstanceRoleBindingsPayload
 type RemoveInstanceRoleBindingsPayload struct {
-	Role                 string `json:"role" validate:"regexp=^[a-z](?:[-.]?[a-z]){1,63}$"`
+	Role                 string `json:"role" validate:"regexp=^[a-z](?:[-.]?[a-z]){1\\,63}$"`
 	Subject              string `json:"subject"`
 	AdditionalProperties map[string]interface{}
 }
diff --git a/services/secretsmanager/v1alphaapi/model_remove_secret_group_role_bindings_payload.go b/services/secretsmanager/v1alphaapi/model_remove_secret_group_role_bindings_payload.go
index 0dc4b82ca..a47df0cf3 100644
--- a/services/secretsmanager/v1alphaapi/model_remove_secret_group_role_bindings_payload.go
+++ b/services/secretsmanager/v1alphaapi/model_remove_secret_group_role_bindings_payload.go
@@ -20,7 +20,7 @@ var _ MappedNullable = &RemoveSecretGroupRoleBindingsPayload{}
 
 // RemoveSecretGroupRoleBindingsPayload struct for RemoveSecretGroupRoleBindingsPayload
 type RemoveSecretGroupRoleBindingsPayload struct {
-	Role                 string `json:"role" validate:"regexp=^[a-z](?:[-.]?[a-z]){1,63}$"`
+	Role                 string `json:"role" validate:"regexp=^[a-z](?:[-.]?[a-z]){1\\,63}$"`
 	Subject              string `json:"subject"`
 	AdditionalProperties map[string]interface{}
 }
diff --git a/services/secretsmanager/v1alphaapi/model_role_binding.go b/services/secretsmanager/v1alphaapi/model_role_binding.go
index a897d05ca..22a536f1d 100644
--- a/services/secretsmanager/v1alphaapi/model_role_binding.go
+++ b/services/secretsmanager/v1alphaapi/model_role_binding.go
@@ -20,7 +20,7 @@ var _ MappedNullable = &RoleBinding{}
 
 // RoleBinding struct for RoleBinding
 type RoleBinding struct {
-	Role                 string `json:"role" validate:"regexp=^[a-z](?:[-.]?[a-z]){1,63}$"`
+	Role                 string `json:"role" validate:"regexp=^[a-z](?:[-.]?[a-z]){1\\,63}$"`
 	Subject              string `json:"subject"`
 	AdditionalProperties map[string]interface{}
 }
diff --git a/services/secretsmanager/v1api/client.go b/services/secretsmanager/v1api/client.go
index b1df2dc3e..4745ba467 100644
--- a/services/secretsmanager/v1api/client.go
+++ b/services/secretsmanager/v1api/client.go
@@ -461,6 +461,15 @@ func (c *APIClient) decode(v interface{}, b []byte, contentType string) (err err
 		*s = string(b)
 		return nil
 	}
+	if r, ok := v.(*io.Reader); ok {
+		*r = bytes.NewReader(b)
+		return nil
+	}
+	// Must stay before the JSON branch: json.Unmarshal would base64-decode into *[]byte.
+	if p, ok := v.(*[]byte); ok {
+		*p = b
+		return nil
+	}
 	if f, ok := v.(*os.File); ok {
 		f, err = os.CreateTemp("", "HttpClientFile")
 		if err != nil {