diff --git a/private/gen/proto/go/buf/alpha/registry/v1alpha1/doc.pb.go b/private/gen/proto/go/buf/alpha/registry/v1alpha1/doc.pb.go
index 4372845101..a3dcf70cf1 100644
--- a/private/gen/proto/go/buf/alpha/registry/v1alpha1/doc.pb.go
+++ b/private/gen/proto/go/buf/alpha/registry/v1alpha1/doc.pb.go
@@ -34,6 +34,59 @@ const (
 	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
 )
 
+// FieldType indicates whether a field is a normal, an extension or an any.
+type FieldType int32
+
+const (
+	FieldType_FIELD_TYPE_UNSPECIFIED FieldType = 0
+	FieldType_FIELD_TYPE_NORMAL      FieldType = 1
+	FieldType_FIELD_TYPE_EXTENSION   FieldType = 2
+	FieldType_FIELD_TYPE_ANY         FieldType = 3
+)
+
+// Enum value maps for FieldType.
+var (
+	FieldType_name = map[int32]string{
+		0: "FIELD_TYPE_UNSPECIFIED",
+		1: "FIELD_TYPE_NORMAL",
+		2: "FIELD_TYPE_EXTENSION",
+		3: "FIELD_TYPE_ANY",
+	}
+	FieldType_value = map[string]int32{
+		"FIELD_TYPE_UNSPECIFIED": 0,
+		"FIELD_TYPE_NORMAL":      1,
+		"FIELD_TYPE_EXTENSION":   2,
+		"FIELD_TYPE_ANY":         3,
+	}
+)
+
+func (x FieldType) Enum() *FieldType {
+	p := new(FieldType)
+	*p = x
+	return p
+}
+
+func (x FieldType) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (FieldType) Descriptor() protoreflect.EnumDescriptor {
+	return file_buf_alpha_registry_v1alpha1_doc_proto_enumTypes[0].Descriptor()
+}
+
+func (FieldType) Type() protoreflect.EnumType {
+	return &file_buf_alpha_registry_v1alpha1_doc_proto_enumTypes[0]
+}
+
+func (x FieldType) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use FieldType.Descriptor instead.
+func (FieldType) EnumDescriptor() ([]byte, []int) {
+	return file_buf_alpha_registry_v1alpha1_doc_proto_rawDescGZIP(), []int{0}
+}
+
 // GetSourceDirectoryInfoRequest takes an owner, repository, and reference.
 type GetSourceDirectoryInfoRequest struct {
 	state         protoimpl.MessageState
@@ -2314,6 +2367,359 @@ func (x *FieldOptions) GetJstype() int32 {
 	return 0
 }
 
+// FieldLiteral represents a field and its value. It can be used to model descriptor options.
+type FieldLiteral struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// When is_extension is true, name is the fully-qualified name of the
+	// extension. Otherwise, it is the simple name of the field.
+	Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
+	// The unique field number associated with the field.
+	Tag int32 `protobuf:"varint,2,opt,name=tag,proto3" json:"tag,omitempty"`
+	// Indicates whether this is an extension or not.
+	FieldType FieldType `protobuf:"varint,3,opt,name=field_type,json=fieldType,proto3,enum=buf.alpha.registry.v1alpha1.FieldType" json:"field_type,omitempty"`
+	// The field's value.
+	Value *LiteralValue `protobuf:"bytes,4,opt,name=value,proto3" json:"value,omitempty"`
+	// This is the module where the extension is defined if the field type
+	// is extension or the module where the messages is defined for field type any.
+	ImportModuleRef *ImportModuleRef `protobuf:"bytes,5,opt,name=import_module_ref,json=importModuleRef,proto3" json:"import_module_ref,omitempty"`
+}
+
+func (x *FieldLiteral) Reset() {
+	*x = FieldLiteral{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_buf_alpha_registry_v1alpha1_doc_proto_msgTypes[31]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *FieldLiteral) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*FieldLiteral) ProtoMessage() {}
+
+func (x *FieldLiteral) ProtoReflect() protoreflect.Message {
+	mi := &file_buf_alpha_registry_v1alpha1_doc_proto_msgTypes[31]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use FieldLiteral.ProtoReflect.Descriptor instead.
+func (*FieldLiteral) Descriptor() ([]byte, []int) {
+	return file_buf_alpha_registry_v1alpha1_doc_proto_rawDescGZIP(), []int{31}
+}
+
+func (x *FieldLiteral) GetName() string {
+	if x != nil {
+		return x.Name
+	}
+	return ""
+}
+
+func (x *FieldLiteral) GetTag() int32 {
+	if x != nil {
+		return x.Tag
+	}
+	return 0
+}
+
+func (x *FieldLiteral) GetFieldType() FieldType {
+	if x != nil {
+		return x.FieldType
+	}
+	return FieldType_FIELD_TYPE_UNSPECIFIED
+}
+
+func (x *FieldLiteral) GetValue() *LiteralValue {
+	if x != nil {
+		return x.Value
+	}
+	return nil
+}
+
+func (x *FieldLiteral) GetImportModuleRef() *ImportModuleRef {
+	if x != nil {
+		return x.ImportModuleRef
+	}
+	return nil
+}
+
+// MessageLiteral represents an option value for a type that is a message.
+type MessageLiteral struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// Map of field names to value. Extension field names will be in the form:
+	// [fully.qualified.extension.Name].
+	Fields []*FieldLiteral `protobuf:"bytes,1,rep,name=fields,proto3" json:"fields,omitempty"`
+}
+
+func (x *MessageLiteral) Reset() {
+	*x = MessageLiteral{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_buf_alpha_registry_v1alpha1_doc_proto_msgTypes[32]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *MessageLiteral) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*MessageLiteral) ProtoMessage() {}
+
+func (x *MessageLiteral) ProtoReflect() protoreflect.Message {
+	mi := &file_buf_alpha_registry_v1alpha1_doc_proto_msgTypes[32]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use MessageLiteral.ProtoReflect.Descriptor instead.
+func (*MessageLiteral) Descriptor() ([]byte, []int) {
+	return file_buf_alpha_registry_v1alpha1_doc_proto_rawDescGZIP(), []int{32}
+}
+
+func (x *MessageLiteral) GetFields() []*FieldLiteral {
+	if x != nil {
+		return x.Fields
+	}
+	return nil
+}
+
+// ArrayLiteral represents an option value for a type that is a repeated field.
+// Maps are also represented using an ArrayLiteral, where each map entry is a MessageLiteral
+// that contains a key and value field.
+type ArrayLiteral struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Elements []*LiteralValue `protobuf:"bytes,1,rep,name=elements,proto3" json:"elements,omitempty"`
+}
+
+func (x *ArrayLiteral) Reset() {
+	*x = ArrayLiteral{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_buf_alpha_registry_v1alpha1_doc_proto_msgTypes[33]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ArrayLiteral) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ArrayLiteral) ProtoMessage() {}
+
+func (x *ArrayLiteral) ProtoReflect() protoreflect.Message {
+	mi := &file_buf_alpha_registry_v1alpha1_doc_proto_msgTypes[33]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ArrayLiteral.ProtoReflect.Descriptor instead.
+func (*ArrayLiteral) Descriptor() ([]byte, []int) {
+	return file_buf_alpha_registry_v1alpha1_doc_proto_rawDescGZIP(), []int{33}
+}
+
+func (x *ArrayLiteral) GetElements() []*LiteralValue {
+	if x != nil {
+		return x.Elements
+	}
+	return nil
+}
+
+// LiteralValue represents the actual value of the extension.
+type LiteralValue struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// Types that are assignable to Value:
+	//
+	//	*LiteralValue_StringValue
+	//	*LiteralValue_IntValue
+	//	*LiteralValue_UintValue
+	//	*LiteralValue_DoubleValue
+	//	*LiteralValue_BoolValue
+	//	*LiteralValue_EnumValueNameValue
+	//	*LiteralValue_ArrayValue
+	//	*LiteralValue_MessageValue
+	Value isLiteralValue_Value `protobuf_oneof:"value"`
+}
+
+func (x *LiteralValue) Reset() {
+	*x = LiteralValue{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_buf_alpha_registry_v1alpha1_doc_proto_msgTypes[34]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *LiteralValue) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*LiteralValue) ProtoMessage() {}
+
+func (x *LiteralValue) ProtoReflect() protoreflect.Message {
+	mi := &file_buf_alpha_registry_v1alpha1_doc_proto_msgTypes[34]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use LiteralValue.ProtoReflect.Descriptor instead.
+func (*LiteralValue) Descriptor() ([]byte, []int) {
+	return file_buf_alpha_registry_v1alpha1_doc_proto_rawDescGZIP(), []int{34}
+}
+
+func (m *LiteralValue) GetValue() isLiteralValue_Value {
+	if m != nil {
+		return m.Value
+	}
+	return nil
+}
+
+func (x *LiteralValue) GetStringValue() string {
+	if x, ok := x.GetValue().(*LiteralValue_StringValue); ok {
+		return x.StringValue
+	}
+	return ""
+}
+
+func (x *LiteralValue) GetIntValue() int64 {
+	if x, ok := x.GetValue().(*LiteralValue_IntValue); ok {
+		return x.IntValue
+	}
+	return 0
+}
+
+func (x *LiteralValue) GetUintValue() uint64 {
+	if x, ok := x.GetValue().(*LiteralValue_UintValue); ok {
+		return x.UintValue
+	}
+	return 0
+}
+
+func (x *LiteralValue) GetDoubleValue() float64 {
+	if x, ok := x.GetValue().(*LiteralValue_DoubleValue); ok {
+		return x.DoubleValue
+	}
+	return 0
+}
+
+func (x *LiteralValue) GetBoolValue() bool {
+	if x, ok := x.GetValue().(*LiteralValue_BoolValue); ok {
+		return x.BoolValue
+	}
+	return false
+}
+
+func (x *LiteralValue) GetEnumValueNameValue() string {
+	if x, ok := x.GetValue().(*LiteralValue_EnumValueNameValue); ok {
+		return x.EnumValueNameValue
+	}
+	return ""
+}
+
+func (x *LiteralValue) GetArrayValue() *ArrayLiteral {
+	if x, ok := x.GetValue().(*LiteralValue_ArrayValue); ok {
+		return x.ArrayValue
+	}
+	return nil
+}
+
+func (x *LiteralValue) GetMessageValue() *MessageLiteral {
+	if x, ok := x.GetValue().(*LiteralValue_MessageValue); ok {
+		return x.MessageValue
+	}
+	return nil
+}
+
+type isLiteralValue_Value interface {
+	isLiteralValue_Value()
+}
+
+type LiteralValue_StringValue struct {
+	StringValue string `protobuf:"bytes,2,opt,name=string_value,json=stringValue,proto3,oneof"`
+}
+
+type LiteralValue_IntValue struct {
+	IntValue int64 `protobuf:"varint,3,opt,name=int_value,json=intValue,proto3,oneof"`
+}
+
+type LiteralValue_UintValue struct {
+	UintValue uint64 `protobuf:"varint,4,opt,name=uint_value,json=uintValue,proto3,oneof"`
+}
+
+type LiteralValue_DoubleValue struct {
+	DoubleValue float64 `protobuf:"fixed64,5,opt,name=double_value,json=doubleValue,proto3,oneof"`
+}
+
+type LiteralValue_BoolValue struct {
+	BoolValue bool `protobuf:"varint,6,opt,name=bool_value,json=boolValue,proto3,oneof"`
+}
+
+type LiteralValue_EnumValueNameValue struct {
+	EnumValueNameValue string `protobuf:"bytes,7,opt,name=enum_value_name_value,json=enumValueNameValue,proto3,oneof"`
+}
+
+type LiteralValue_ArrayValue struct {
+	ArrayValue *ArrayLiteral `protobuf:"bytes,8,opt,name=array_value,json=arrayValue,proto3,oneof"`
+}
+
+type LiteralValue_MessageValue struct {
+	MessageValue *MessageLiteral `protobuf:"bytes,9,opt,name=message_value,json=messageValue,proto3,oneof"`
+}
+
+func (*LiteralValue_StringValue) isLiteralValue_Value() {}
+
+func (*LiteralValue_IntValue) isLiteralValue_Value() {}
+
+func (*LiteralValue_UintValue) isLiteralValue_Value() {}
+
+func (*LiteralValue_DoubleValue) isLiteralValue_Value() {}
+
+func (*LiteralValue_BoolValue) isLiteralValue_Value() {}
+
+func (*LiteralValue_EnumValueNameValue) isLiteralValue_Value() {}
+
+func (*LiteralValue_ArrayValue) isLiteralValue_Value() {}
+
+func (*LiteralValue_MessageValue) isLiteralValue_Value() {}
+
 // MapEntry provides the key and value types for the MapEntry type for a map field.
 type MapEntry struct {
 	state         protoimpl.MessageState
@@ -2334,7 +2740,7 @@ type MapEntry struct {
 func (x *MapEntry) Reset() {
 	*x = MapEntry{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_buf_alpha_registry_v1alpha1_doc_proto_msgTypes[31]
+		mi := &file_buf_alpha_registry_v1alpha1_doc_proto_msgTypes[35]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2347,7 +2753,7 @@ func (x *MapEntry) String() string {
 func (*MapEntry) ProtoMessage() {}
 
 func (x *MapEntry) ProtoReflect() protoreflect.Message {
-	mi := &file_buf_alpha_registry_v1alpha1_doc_proto_msgTypes[31]
+	mi := &file_buf_alpha_registry_v1alpha1_doc_proto_msgTypes[35]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2360,7 +2766,7 @@ func (x *MapEntry) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use MapEntry.ProtoReflect.Descriptor instead.
 func (*MapEntry) Descriptor() ([]byte, []int) {
-	return file_buf_alpha_registry_v1alpha1_doc_proto_rawDescGZIP(), []int{31}
+	return file_buf_alpha_registry_v1alpha1_doc_proto_rawDescGZIP(), []int{35}
 }
 
 func (x *MapEntry) GetKeyFullType() string {
@@ -2416,7 +2822,7 @@ type FileExtension struct {
 func (x *FileExtension) Reset() {
 	*x = FileExtension{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_buf_alpha_registry_v1alpha1_doc_proto_msgTypes[32]
+		mi := &file_buf_alpha_registry_v1alpha1_doc_proto_msgTypes[36]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2429,7 +2835,7 @@ func (x *FileExtension) String() string {
 func (*FileExtension) ProtoMessage() {}
 
 func (x *FileExtension) ProtoReflect() protoreflect.Message {
-	mi := &file_buf_alpha_registry_v1alpha1_doc_proto_msgTypes[32]
+	mi := &file_buf_alpha_registry_v1alpha1_doc_proto_msgTypes[36]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2442,7 +2848,7 @@ func (x *FileExtension) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use FileExtension.ProtoReflect.Descriptor instead.
 func (*FileExtension) Descriptor() ([]byte, []int) {
-	return file_buf_alpha_registry_v1alpha1_doc_proto_rawDescGZIP(), []int{32}
+	return file_buf_alpha_registry_v1alpha1_doc_proto_rawDescGZIP(), []int{36}
 }
 
 func (x *FileExtension) GetExtensionType() string {
@@ -2839,104 +3245,165 @@ var file_buf_alpha_registry_v1alpha1_doc_proto_rawDesc = []byte{
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+	0x68, 0x61, 0x31, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -2951,92 +3418,105 @@ func file_buf_alpha_registry_v1alpha1_doc_proto_rawDescGZIP() []byte {
 	return file_buf_alpha_registry_v1alpha1_doc_proto_rawDescData
 }
 
-var file_buf_alpha_registry_v1alpha1_doc_proto_msgTypes = make([]protoimpl.MessageInfo, 33)
+var file_buf_alpha_registry_v1alpha1_doc_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
+var file_buf_alpha_registry_v1alpha1_doc_proto_msgTypes = make([]protoimpl.MessageInfo, 37)
 var file_buf_alpha_registry_v1alpha1_doc_proto_goTypes = []interface{}{
-	(*GetSourceDirectoryInfoRequest)(nil),   // 0: buf.alpha.registry.v1alpha1.GetSourceDirectoryInfoRequest
-	(*GetSourceDirectoryInfoResponse)(nil),  // 1: buf.alpha.registry.v1alpha1.GetSourceDirectoryInfoResponse
-	(*FileInfo)(nil),                        // 2: buf.alpha.registry.v1alpha1.FileInfo
-	(*GetSourceFileRequest)(nil),            // 3: buf.alpha.registry.v1alpha1.GetSourceFileRequest
-	(*GetSourceFileResponse)(nil),           // 4: buf.alpha.registry.v1alpha1.GetSourceFileResponse
-	(*GetModulePackagesRequest)(nil),        // 5: buf.alpha.registry.v1alpha1.GetModulePackagesRequest
-	(*GetModulePackagesResponse)(nil),       // 6: buf.alpha.registry.v1alpha1.GetModulePackagesResponse
-	(*ModulePackage)(nil),                   // 7: buf.alpha.registry.v1alpha1.ModulePackage
-	(*GetModuleDocumentationRequest)(nil),   // 8: buf.alpha.registry.v1alpha1.GetModuleDocumentationRequest
-	(*GetModuleDocumentationResponse)(nil),  // 9: buf.alpha.registry.v1alpha1.GetModuleDocumentationResponse
-	(*ModuleDocumentation)(nil),             // 10: buf.alpha.registry.v1alpha1.ModuleDocumentation
-	(*GetPackageDocumentationRequest)(nil),  // 11: buf.alpha.registry.v1alpha1.GetPackageDocumentationRequest
-	(*GetPackageDocumentationResponse)(nil), // 12: buf.alpha.registry.v1alpha1.GetPackageDocumentationResponse
-	(*PackageDocumentation)(nil),            // 13: buf.alpha.registry.v1alpha1.PackageDocumentation
-	(*Location)(nil),                        // 14: buf.alpha.registry.v1alpha1.Location
-	(*Service)(nil),                         // 15: buf.alpha.registry.v1alpha1.Service
-	(*ServiceOptions)(nil),                  // 16: buf.alpha.registry.v1alpha1.ServiceOptions
-	(*Method)(nil),                          // 17: buf.alpha.registry.v1alpha1.Method
-	(*MethodOptions)(nil),                   // 18: buf.alpha.registry.v1alpha1.MethodOptions
-	(*MethodRequestResponse)(nil),           // 19: buf.alpha.registry.v1alpha1.MethodRequestResponse
-	(*Enum)(nil),                            // 20: buf.alpha.registry.v1alpha1.Enum
-	(*EnumOptions)(nil),                     // 21: buf.alpha.registry.v1alpha1.EnumOptions
-	(*EnumValue)(nil),                       // 22: buf.alpha.registry.v1alpha1.EnumValue
-	(*EnumValueOptions)(nil),                // 23: buf.alpha.registry.v1alpha1.EnumValueOptions
-	(*ImportModuleRef)(nil),                 // 24: buf.alpha.registry.v1alpha1.ImportModuleRef
-	(*Message)(nil),                         // 25: buf.alpha.registry.v1alpha1.Message
-	(*MessageField)(nil),                    // 26: buf.alpha.registry.v1alpha1.MessageField
-	(*MessageOptions)(nil),                  // 27: buf.alpha.registry.v1alpha1.MessageOptions
-	(*Oneof)(nil),                           // 28: buf.alpha.registry.v1alpha1.Oneof
-	(*Field)(nil),                           // 29: buf.alpha.registry.v1alpha1.Field
-	(*FieldOptions)(nil),                    // 30: buf.alpha.registry.v1alpha1.FieldOptions
-	(*MapEntry)(nil),                        // 31: buf.alpha.registry.v1alpha1.MapEntry
-	(*FileExtension)(nil),                   // 32: buf.alpha.registry.v1alpha1.FileExtension
+	(FieldType)(0),                          // 0: buf.alpha.registry.v1alpha1.FieldType
+	(*GetSourceDirectoryInfoRequest)(nil),   // 1: buf.alpha.registry.v1alpha1.GetSourceDirectoryInfoRequest
+	(*GetSourceDirectoryInfoResponse)(nil),  // 2: buf.alpha.registry.v1alpha1.GetSourceDirectoryInfoResponse
+	(*FileInfo)(nil),                        // 3: buf.alpha.registry.v1alpha1.FileInfo
+	(*GetSourceFileRequest)(nil),            // 4: buf.alpha.registry.v1alpha1.GetSourceFileRequest
+	(*GetSourceFileResponse)(nil),           // 5: buf.alpha.registry.v1alpha1.GetSourceFileResponse
+	(*GetModulePackagesRequest)(nil),        // 6: buf.alpha.registry.v1alpha1.GetModulePackagesRequest
+	(*GetModulePackagesResponse)(nil),       // 7: buf.alpha.registry.v1alpha1.GetModulePackagesResponse
+	(*ModulePackage)(nil),                   // 8: buf.alpha.registry.v1alpha1.ModulePackage
+	(*GetModuleDocumentationRequest)(nil),   // 9: buf.alpha.registry.v1alpha1.GetModuleDocumentationRequest
+	(*GetModuleDocumentationResponse)(nil),  // 10: buf.alpha.registry.v1alpha1.GetModuleDocumentationResponse
+	(*ModuleDocumentation)(nil),             // 11: buf.alpha.registry.v1alpha1.ModuleDocumentation
+	(*GetPackageDocumentationRequest)(nil),  // 12: buf.alpha.registry.v1alpha1.GetPackageDocumentationRequest
+	(*GetPackageDocumentationResponse)(nil), // 13: buf.alpha.registry.v1alpha1.GetPackageDocumentationResponse
+	(*PackageDocumentation)(nil),            // 14: buf.alpha.registry.v1alpha1.PackageDocumentation
+	(*Location)(nil),                        // 15: buf.alpha.registry.v1alpha1.Location
+	(*Service)(nil),                         // 16: buf.alpha.registry.v1alpha1.Service
+	(*ServiceOptions)(nil),                  // 17: buf.alpha.registry.v1alpha1.ServiceOptions
+	(*Method)(nil),                          // 18: buf.alpha.registry.v1alpha1.Method
+	(*MethodOptions)(nil),                   // 19: buf.alpha.registry.v1alpha1.MethodOptions
+	(*MethodRequestResponse)(nil),           // 20: buf.alpha.registry.v1alpha1.MethodRequestResponse
+	(*Enum)(nil),                            // 21: buf.alpha.registry.v1alpha1.Enum
+	(*EnumOptions)(nil),                     // 22: buf.alpha.registry.v1alpha1.EnumOptions
+	(*EnumValue)(nil),                       // 23: buf.alpha.registry.v1alpha1.EnumValue
+	(*EnumValueOptions)(nil),                // 24: buf.alpha.registry.v1alpha1.EnumValueOptions
+	(*ImportModuleRef)(nil),                 // 25: buf.alpha.registry.v1alpha1.ImportModuleRef
+	(*Message)(nil),                         // 26: buf.alpha.registry.v1alpha1.Message
+	(*MessageField)(nil),                    // 27: buf.alpha.registry.v1alpha1.MessageField
+	(*MessageOptions)(nil),                  // 28: buf.alpha.registry.v1alpha1.MessageOptions
+	(*Oneof)(nil),                           // 29: buf.alpha.registry.v1alpha1.Oneof
+	(*Field)(nil),                           // 30: buf.alpha.registry.v1alpha1.Field
+	(*FieldOptions)(nil),                    // 31: buf.alpha.registry.v1alpha1.FieldOptions
+	(*FieldLiteral)(nil),                    // 32: buf.alpha.registry.v1alpha1.FieldLiteral
+	(*MessageLiteral)(nil),                  // 33: buf.alpha.registry.v1alpha1.MessageLiteral
+	(*ArrayLiteral)(nil),                    // 34: buf.alpha.registry.v1alpha1.ArrayLiteral
+	(*LiteralValue)(nil),                    // 35: buf.alpha.registry.v1alpha1.LiteralValue
+	(*MapEntry)(nil),                        // 36: buf.alpha.registry.v1alpha1.MapEntry
+	(*FileExtension)(nil),                   // 37: buf.alpha.registry.v1alpha1.FileExtension
 }
 var file_buf_alpha_registry_v1alpha1_doc_proto_depIdxs = []int32{
-	2,  // 0: buf.alpha.registry.v1alpha1.GetSourceDirectoryInfoResponse.root:type_name -> buf.alpha.registry.v1alpha1.FileInfo
-	2,  // 1: buf.alpha.registry.v1alpha1.FileInfo.children:type_name -> buf.alpha.registry.v1alpha1.FileInfo
-	7,  // 2: buf.alpha.registry.v1alpha1.GetModulePackagesResponse.module_packages:type_name -> buf.alpha.registry.v1alpha1.ModulePackage
-	10, // 3: buf.alpha.registry.v1alpha1.GetModuleDocumentationResponse.module_documentation:type_name -> buf.alpha.registry.v1alpha1.ModuleDocumentation
-	13, // 4: buf.alpha.registry.v1alpha1.GetPackageDocumentationResponse.package_documentation:type_name -> buf.alpha.registry.v1alpha1.PackageDocumentation
-	15, // 5: buf.alpha.registry.v1alpha1.PackageDocumentation.services:type_name -> buf.alpha.registry.v1alpha1.Service
-	20, // 6: buf.alpha.registry.v1alpha1.PackageDocumentation.enums:type_name -> buf.alpha.registry.v1alpha1.Enum
-	25, // 7: buf.alpha.registry.v1alpha1.PackageDocumentation.messages:type_name -> buf.alpha.registry.v1alpha1.Message
-	32, // 8: buf.alpha.registry.v1alpha1.PackageDocumentation.file_extensions:type_name -> buf.alpha.registry.v1alpha1.FileExtension
-	14, // 9: buf.alpha.registry.v1alpha1.Service.location:type_name -> buf.alpha.registry.v1alpha1.Location
-	17, // 10: buf.alpha.registry.v1alpha1.Service.methods:type_name -> buf.alpha.registry.v1alpha1.Method
-	16, // 11: buf.alpha.registry.v1alpha1.Service.service_options:type_name -> buf.alpha.registry.v1alpha1.ServiceOptions
-	19, // 12: buf.alpha.registry.v1alpha1.Method.request:type_name -> buf.alpha.registry.v1alpha1.MethodRequestResponse
-	19, // 13: buf.alpha.registry.v1alpha1.Method.response:type_name -> buf.alpha.registry.v1alpha1.MethodRequestResponse
-	18, // 14: buf.alpha.registry.v1alpha1.Method.method_options:type_name -> buf.alpha.registry.v1alpha1.MethodOptions
-	25, // 15: buf.alpha.registry.v1alpha1.MethodRequestResponse.message:type_name -> buf.alpha.registry.v1alpha1.Message
-	24, // 16: buf.alpha.registry.v1alpha1.MethodRequestResponse.import_module_ref:type_name -> buf.alpha.registry.v1alpha1.ImportModuleRef
-	14, // 17: buf.alpha.registry.v1alpha1.Enum.location:type_name -> buf.alpha.registry.v1alpha1.Location
-	22, // 18: buf.alpha.registry.v1alpha1.Enum.values:type_name -> buf.alpha.registry.v1alpha1.EnumValue
-	21, // 19: buf.alpha.registry.v1alpha1.Enum.enum_options:type_name -> buf.alpha.registry.v1alpha1.EnumOptions
-	23, // 20: buf.alpha.registry.v1alpha1.EnumValue.enum_value_options:type_name -> buf.alpha.registry.v1alpha1.EnumValueOptions
-	26, // 21: buf.alpha.registry.v1alpha1.Message.fields:type_name -> buf.alpha.registry.v1alpha1.MessageField
-	14, // 22: buf.alpha.registry.v1alpha1.Message.location:type_name -> buf.alpha.registry.v1alpha1.Location
-	29, // 23: buf.alpha.registry.v1alpha1.Message.message_extensions:type_name -> buf.alpha.registry.v1alpha1.Field
-	27, // 24: buf.alpha.registry.v1alpha1.Message.message_options:type_name -> buf.alpha.registry.v1alpha1.MessageOptions
-	29, // 25: buf.alpha.registry.v1alpha1.MessageField.field:type_name -> buf.alpha.registry.v1alpha1.Field
-	28, // 26: buf.alpha.registry.v1alpha1.MessageField.oneof:type_name -> buf.alpha.registry.v1alpha1.Oneof
-	29, // 27: buf.alpha.registry.v1alpha1.Oneof.fields:type_name -> buf.alpha.registry.v1alpha1.Field
-	31, // 28: buf.alpha.registry.v1alpha1.Field.map_entry:type_name -> buf.alpha.registry.v1alpha1.MapEntry
-	24, // 29: buf.alpha.registry.v1alpha1.Field.import_module_ref:type_name -> buf.alpha.registry.v1alpha1.ImportModuleRef
-	30, // 30: buf.alpha.registry.v1alpha1.Field.field_options:type_name -> buf.alpha.registry.v1alpha1.FieldOptions
-	24, // 31: buf.alpha.registry.v1alpha1.MapEntry.value_import_module_ref:type_name -> buf.alpha.registry.v1alpha1.ImportModuleRef
-	14, // 32: buf.alpha.registry.v1alpha1.FileExtension.location:type_name -> buf.alpha.registry.v1alpha1.Location
-	29, // 33: buf.alpha.registry.v1alpha1.FileExtension.fields:type_name -> buf.alpha.registry.v1alpha1.Field
-	0,  // 34: buf.alpha.registry.v1alpha1.DocService.GetSourceDirectoryInfo:input_type -> buf.alpha.registry.v1alpha1.GetSourceDirectoryInfoRequest
-	3,  // 35: buf.alpha.registry.v1alpha1.DocService.GetSourceFile:input_type -> buf.alpha.registry.v1alpha1.GetSourceFileRequest
-	5,  // 36: buf.alpha.registry.v1alpha1.DocService.GetModulePackages:input_type -> buf.alpha.registry.v1alpha1.GetModulePackagesRequest
-	8,  // 37: buf.alpha.registry.v1alpha1.DocService.GetModuleDocumentation:input_type -> buf.alpha.registry.v1alpha1.GetModuleDocumentationRequest
-	11, // 38: buf.alpha.registry.v1alpha1.DocService.GetPackageDocumentation:input_type -> buf.alpha.registry.v1alpha1.GetPackageDocumentationRequest
-	1,  // 39: buf.alpha.registry.v1alpha1.DocService.GetSourceDirectoryInfo:output_type -> buf.alpha.registry.v1alpha1.GetSourceDirectoryInfoResponse
-	4,  // 40: buf.alpha.registry.v1alpha1.DocService.GetSourceFile:output_type -> buf.alpha.registry.v1alpha1.GetSourceFileResponse
-	6,  // 41: buf.alpha.registry.v1alpha1.DocService.GetModulePackages:output_type -> buf.alpha.registry.v1alpha1.GetModulePackagesResponse
-	9,  // 42: buf.alpha.registry.v1alpha1.DocService.GetModuleDocumentation:output_type -> buf.alpha.registry.v1alpha1.GetModuleDocumentationResponse
-	12, // 43: buf.alpha.registry.v1alpha1.DocService.GetPackageDocumentation:output_type -> buf.alpha.registry.v1alpha1.GetPackageDocumentationResponse
-	39, // [39:44] is the sub-list for method output_type
-	34, // [34:39] is the sub-list for method input_type
-	34, // [34:34] is the sub-list for extension type_name
-	34, // [34:34] is the sub-list for extension extendee
-	0,  // [0:34] is the sub-list for field type_name
+	3,  // 0: buf.alpha.registry.v1alpha1.GetSourceDirectoryInfoResponse.root:type_name -> buf.alpha.registry.v1alpha1.FileInfo
+	3,  // 1: buf.alpha.registry.v1alpha1.FileInfo.children:type_name -> buf.alpha.registry.v1alpha1.FileInfo
+	8,  // 2: buf.alpha.registry.v1alpha1.GetModulePackagesResponse.module_packages:type_name -> buf.alpha.registry.v1alpha1.ModulePackage
+	11, // 3: buf.alpha.registry.v1alpha1.GetModuleDocumentationResponse.module_documentation:type_name -> buf.alpha.registry.v1alpha1.ModuleDocumentation
+	14, // 4: buf.alpha.registry.v1alpha1.GetPackageDocumentationResponse.package_documentation:type_name -> buf.alpha.registry.v1alpha1.PackageDocumentation
+	16, // 5: buf.alpha.registry.v1alpha1.PackageDocumentation.services:type_name -> buf.alpha.registry.v1alpha1.Service
+	21, // 6: buf.alpha.registry.v1alpha1.PackageDocumentation.enums:type_name -> buf.alpha.registry.v1alpha1.Enum
+	26, // 7: buf.alpha.registry.v1alpha1.PackageDocumentation.messages:type_name -> buf.alpha.registry.v1alpha1.Message
+	37, // 8: buf.alpha.registry.v1alpha1.PackageDocumentation.file_extensions:type_name -> buf.alpha.registry.v1alpha1.FileExtension
+	15, // 9: buf.alpha.registry.v1alpha1.Service.location:type_name -> buf.alpha.registry.v1alpha1.Location
+	18, // 10: buf.alpha.registry.v1alpha1.Service.methods:type_name -> buf.alpha.registry.v1alpha1.Method
+	17, // 11: buf.alpha.registry.v1alpha1.Service.service_options:type_name -> buf.alpha.registry.v1alpha1.ServiceOptions
+	20, // 12: buf.alpha.registry.v1alpha1.Method.request:type_name -> buf.alpha.registry.v1alpha1.MethodRequestResponse
+	20, // 13: buf.alpha.registry.v1alpha1.Method.response:type_name -> buf.alpha.registry.v1alpha1.MethodRequestResponse
+	19, // 14: buf.alpha.registry.v1alpha1.Method.method_options:type_name -> buf.alpha.registry.v1alpha1.MethodOptions
+	26, // 15: buf.alpha.registry.v1alpha1.MethodRequestResponse.message:type_name -> buf.alpha.registry.v1alpha1.Message
+	25, // 16: buf.alpha.registry.v1alpha1.MethodRequestResponse.import_module_ref:type_name -> buf.alpha.registry.v1alpha1.ImportModuleRef
+	15, // 17: buf.alpha.registry.v1alpha1.Enum.location:type_name -> buf.alpha.registry.v1alpha1.Location
+	23, // 18: buf.alpha.registry.v1alpha1.Enum.values:type_name -> buf.alpha.registry.v1alpha1.EnumValue
+	22, // 19: buf.alpha.registry.v1alpha1.Enum.enum_options:type_name -> buf.alpha.registry.v1alpha1.EnumOptions
+	24, // 20: buf.alpha.registry.v1alpha1.EnumValue.enum_value_options:type_name -> buf.alpha.registry.v1alpha1.EnumValueOptions
+	27, // 21: buf.alpha.registry.v1alpha1.Message.fields:type_name -> buf.alpha.registry.v1alpha1.MessageField
+	15, // 22: buf.alpha.registry.v1alpha1.Message.location:type_name -> buf.alpha.registry.v1alpha1.Location
+	30, // 23: buf.alpha.registry.v1alpha1.Message.message_extensions:type_name -> buf.alpha.registry.v1alpha1.Field
+	28, // 24: buf.alpha.registry.v1alpha1.Message.message_options:type_name -> buf.alpha.registry.v1alpha1.MessageOptions
+	30, // 25: buf.alpha.registry.v1alpha1.MessageField.field:type_name -> buf.alpha.registry.v1alpha1.Field
+	29, // 26: buf.alpha.registry.v1alpha1.MessageField.oneof:type_name -> buf.alpha.registry.v1alpha1.Oneof
+	30, // 27: buf.alpha.registry.v1alpha1.Oneof.fields:type_name -> buf.alpha.registry.v1alpha1.Field
+	36, // 28: buf.alpha.registry.v1alpha1.Field.map_entry:type_name -> buf.alpha.registry.v1alpha1.MapEntry
+	25, // 29: buf.alpha.registry.v1alpha1.Field.import_module_ref:type_name -> buf.alpha.registry.v1alpha1.ImportModuleRef
+	31, // 30: buf.alpha.registry.v1alpha1.Field.field_options:type_name -> buf.alpha.registry.v1alpha1.FieldOptions
+	0,  // 31: buf.alpha.registry.v1alpha1.FieldLiteral.field_type:type_name -> buf.alpha.registry.v1alpha1.FieldType
+	35, // 32: buf.alpha.registry.v1alpha1.FieldLiteral.value:type_name -> buf.alpha.registry.v1alpha1.LiteralValue
+	25, // 33: buf.alpha.registry.v1alpha1.FieldLiteral.import_module_ref:type_name -> buf.alpha.registry.v1alpha1.ImportModuleRef
+	32, // 34: buf.alpha.registry.v1alpha1.MessageLiteral.fields:type_name -> buf.alpha.registry.v1alpha1.FieldLiteral
+	35, // 35: buf.alpha.registry.v1alpha1.ArrayLiteral.elements:type_name -> buf.alpha.registry.v1alpha1.LiteralValue
+	34, // 36: buf.alpha.registry.v1alpha1.LiteralValue.array_value:type_name -> buf.alpha.registry.v1alpha1.ArrayLiteral
+	33, // 37: buf.alpha.registry.v1alpha1.LiteralValue.message_value:type_name -> buf.alpha.registry.v1alpha1.MessageLiteral
+	25, // 38: buf.alpha.registry.v1alpha1.MapEntry.value_import_module_ref:type_name -> buf.alpha.registry.v1alpha1.ImportModuleRef
+	15, // 39: buf.alpha.registry.v1alpha1.FileExtension.location:type_name -> buf.alpha.registry.v1alpha1.Location
+	30, // 40: buf.alpha.registry.v1alpha1.FileExtension.fields:type_name -> buf.alpha.registry.v1alpha1.Field
+	1,  // 41: buf.alpha.registry.v1alpha1.DocService.GetSourceDirectoryInfo:input_type -> buf.alpha.registry.v1alpha1.GetSourceDirectoryInfoRequest
+	4,  // 42: buf.alpha.registry.v1alpha1.DocService.GetSourceFile:input_type -> buf.alpha.registry.v1alpha1.GetSourceFileRequest
+	6,  // 43: buf.alpha.registry.v1alpha1.DocService.GetModulePackages:input_type -> buf.alpha.registry.v1alpha1.GetModulePackagesRequest
+	9,  // 44: buf.alpha.registry.v1alpha1.DocService.GetModuleDocumentation:input_type -> buf.alpha.registry.v1alpha1.GetModuleDocumentationRequest
+	12, // 45: buf.alpha.registry.v1alpha1.DocService.GetPackageDocumentation:input_type -> buf.alpha.registry.v1alpha1.GetPackageDocumentationRequest
+	2,  // 46: buf.alpha.registry.v1alpha1.DocService.GetSourceDirectoryInfo:output_type -> buf.alpha.registry.v1alpha1.GetSourceDirectoryInfoResponse
+	5,  // 47: buf.alpha.registry.v1alpha1.DocService.GetSourceFile:output_type -> buf.alpha.registry.v1alpha1.GetSourceFileResponse
+	7,  // 48: buf.alpha.registry.v1alpha1.DocService.GetModulePackages:output_type -> buf.alpha.registry.v1alpha1.GetModulePackagesResponse
+	10, // 49: buf.alpha.registry.v1alpha1.DocService.GetModuleDocumentation:output_type -> buf.alpha.registry.v1alpha1.GetModuleDocumentationResponse
+	13, // 50: buf.alpha.registry.v1alpha1.DocService.GetPackageDocumentation:output_type -> buf.alpha.registry.v1alpha1.GetPackageDocumentationResponse
+	46, // [46:51] is the sub-list for method output_type
+	41, // [41:46] is the sub-list for method input_type
+	41, // [41:41] is the sub-list for extension type_name
+	41, // [41:41] is the sub-list for extension extendee
+	0,  // [0:41] is the sub-list for field type_name
 }
 
 func init() { file_buf_alpha_registry_v1alpha1_doc_proto_init() }
@@ -3418,7 +3898,7 @@ func file_buf_alpha_registry_v1alpha1_doc_proto_init() {
 			}
 		}
 		file_buf_alpha_registry_v1alpha1_doc_proto_msgTypes[31].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*MapEntry); i {
+			switch v := v.(*FieldLiteral); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -3430,6 +3910,54 @@ func file_buf_alpha_registry_v1alpha1_doc_proto_init() {
 			}
 		}
 		file_buf_alpha_registry_v1alpha1_doc_proto_msgTypes[32].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*MessageLiteral); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_buf_alpha_registry_v1alpha1_doc_proto_msgTypes[33].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ArrayLiteral); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_buf_alpha_registry_v1alpha1_doc_proto_msgTypes[34].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*LiteralValue); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_buf_alpha_registry_v1alpha1_doc_proto_msgTypes[35].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*MapEntry); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_buf_alpha_registry_v1alpha1_doc_proto_msgTypes[36].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*FileExtension); i {
 			case 0:
 				return &v.state
@@ -3447,18 +3975,29 @@ func file_buf_alpha_registry_v1alpha1_doc_proto_init() {
 		(*MessageField_Oneof)(nil),
 	}
 	file_buf_alpha_registry_v1alpha1_doc_proto_msgTypes[30].OneofWrappers = []interface{}{}
+	file_buf_alpha_registry_v1alpha1_doc_proto_msgTypes[34].OneofWrappers = []interface{}{
+		(*LiteralValue_StringValue)(nil),
+		(*LiteralValue_IntValue)(nil),
+		(*LiteralValue_UintValue)(nil),
+		(*LiteralValue_DoubleValue)(nil),
+		(*LiteralValue_BoolValue)(nil),
+		(*LiteralValue_EnumValueNameValue)(nil),
+		(*LiteralValue_ArrayValue)(nil),
+		(*LiteralValue_MessageValue)(nil),
+	}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
 		File: protoimpl.DescBuilder{
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_buf_alpha_registry_v1alpha1_doc_proto_rawDesc,
-			NumEnums:      0,
-			NumMessages:   33,
+			NumEnums:      1,
+			NumMessages:   37,
 			NumExtensions: 0,
 			NumServices:   1,
 		},
 		GoTypes:           file_buf_alpha_registry_v1alpha1_doc_proto_goTypes,
 		DependencyIndexes: file_buf_alpha_registry_v1alpha1_doc_proto_depIdxs,
+		EnumInfos:         file_buf_alpha_registry_v1alpha1_doc_proto_enumTypes,
 		MessageInfos:      file_buf_alpha_registry_v1alpha1_doc_proto_msgTypes,
 	}.Build()
 	File_buf_alpha_registry_v1alpha1_doc_proto = out.File
diff --git a/proto/buf/alpha/registry/v1alpha1/doc.proto b/proto/buf/alpha/registry/v1alpha1/doc.proto
index 9b997d4445..a338d23c09 100644
--- a/proto/buf/alpha/registry/v1alpha1/doc.proto
+++ b/proto/buf/alpha/registry/v1alpha1/doc.proto
@@ -364,6 +364,7 @@ message Field {
   // Extendee is the name of the type that is being ext if the field is an extension.
   // This is an empty string for fields that are not extenions.
   string extendee = 9;
+
   FieldOptions field_options = 10;
 }
 
@@ -377,6 +378,58 @@ message FieldOptions {
   int32 jstype = 4;
 }
 
+// FieldType indicates whether a field is a normal, an extension or an any.
+enum FieldType {
+  FIELD_TYPE_UNSPECIFIED = 0;
+  FIELD_TYPE_NORMAL = 1;
+  FIELD_TYPE_EXTENSION = 2;
+  FIELD_TYPE_ANY = 3;
+}
+
+// FieldLiteral represents a field and its value. It can be used to model descriptor options.
+message FieldLiteral {
+  // When is_extension is true, name is the fully-qualified name of the
+  // extension. Otherwise, it is the simple name of the field.
+  string name = 1;
+  // The unique field number associated with the field.
+  int32 tag = 2;
+  // Indicates whether this is an extension or not.
+  FieldType field_type = 3;
+  // The field's value.
+  LiteralValue value = 4;
+  // This is the module where the extension is defined if the field type
+  // is extension or the module where the messages is defined for field type any.
+  ImportModuleRef import_module_ref = 5;
+}
+
+// MessageLiteral represents an option value for a type that is a message.
+message MessageLiteral {
+  // Map of field names to value. Extension field names will be in the form:
+  // [fully.qualified.extension.Name].
+  repeated FieldLiteral fields = 1;
+}
+
+// ArrayLiteral represents an option value for a type that is a repeated field.
+// Maps are also represented using an ArrayLiteral, where each map entry is a MessageLiteral
+// that contains a key and value field.
+message ArrayLiteral {
+  repeated LiteralValue elements = 1;
+}
+
+// LiteralValue represents the actual value of the extension.
+message LiteralValue {
+  oneof value {
+    string string_value = 2;
+    int64 int_value = 3;
+    uint64 uint_value = 4;
+    double double_value = 5;
+    bool bool_value = 6;
+    string enum_value_name_value = 7;
+    ArrayLiteral array_value = 8;
+    MessageLiteral message_value = 9;
+  }
+}
+
 // MapEntry provides the key and value types for the MapEntry type for a map field.
 message MapEntry {
   // string representation of the full name of the type for the map key. keys can only be