diff --git a/proto/authzed/api/v1/00_handwritten_validation.go b/proto/authzed/api/v1/00_handwritten_validation.go
index 211a53b..b119626 100644
--- a/proto/authzed/api/v1/00_handwritten_validation.go
+++ b/proto/authzed/api/v1/00_handwritten_validation.go
@@ -3,6 +3,10 @@
 package v1
 
 func (m *CheckPermissionRequest) HandwrittenValidate() error {
+	if m == nil {
+		return nil
+	}
+
 	if m.GetResource() != nil && m.GetResource().GetObjectId() == "*" {
 		return ObjectReferenceValidationError{
 			field:  "ObjectId",
@@ -17,6 +21,10 @@ func (m *CheckPermissionRequest) HandwrittenValidate() error {
 }
 
 func (m *ExpandPermissionTreeRequest) HandwrittenValidate() error {
+	if m == nil {
+		return nil
+	}
+
 	if m.GetResource() != nil && m.GetResource().GetObjectId() == "*" {
 		return ObjectReferenceValidationError{
 			field:  "ObjectId",
@@ -28,6 +36,10 @@ func (m *ExpandPermissionTreeRequest) HandwrittenValidate() error {
 }
 
 func (m *Precondition) HandwrittenValidate() error {
+	if m == nil {
+		return nil
+	}
+
 	if m.GetFilter() != nil {
 		return m.GetFilter().HandwrittenValidate()
 	}
@@ -36,6 +48,10 @@ func (m *Precondition) HandwrittenValidate() error {
 }
 
 func (m *RelationshipFilter) HandwrittenValidate() error {
+	if m == nil {
+		return nil
+	}
+
 	if m.GetOptionalResourceId() == "*" {
 		return RelationshipFilterValidationError{
 			field:  "OptionalResourceId",
@@ -49,6 +65,10 @@ func (m *RelationshipFilter) HandwrittenValidate() error {
 }
 
 func (m *SubjectFilter) HandwrittenValidate() error {
+	if m == nil {
+		return nil
+	}
+
 	if m.GetOptionalSubjectId() == "*" && m.GetOptionalRelation() != nil && m.GetOptionalRelation().GetRelation() != "" {
 		return SubjectFilterValidationError{
 			field:  "OptionalRelation",
@@ -76,6 +96,10 @@ func (m *SubjectReference) HandwrittenValidate() error {
 }
 
 func (m *Relationship) HandwrittenValidate() error {
+	if m == nil {
+		return nil
+	}
+
 	if m.GetResource() != nil && m.GetResource().GetObjectId() == "*" {
 		return ObjectReferenceValidationError{
 			field:  "ObjectId",
@@ -91,6 +115,10 @@ func (m *Relationship) HandwrittenValidate() error {
 }
 
 func (m *DeleteRelationshipsRequest) HandwrittenValidate() error {
+	if m == nil {
+		return nil
+	}
+
 	if m.GetOptionalPreconditions() != nil {
 		for _, precondition := range m.GetOptionalPreconditions() {
 			err := precondition.HandwrittenValidate()
@@ -108,6 +136,10 @@ func (m *DeleteRelationshipsRequest) HandwrittenValidate() error {
 }
 
 func (m *WriteRelationshipsRequest) HandwrittenValidate() error {
+	if m == nil {
+		return nil
+	}
+
 	if m.GetOptionalPreconditions() != nil {
 		for _, precondition := range m.GetOptionalPreconditions() {
 			err := precondition.HandwrittenValidate()