diff --git a/gen/proto/go/coroutine/v1/coroutine.pb.go b/gen/proto/go/coroutine/v1/coroutine.pb.go
index 5046d97..d5d100e 100644
--- a/gen/proto/go/coroutine/v1/coroutine.pb.go
+++ b/gen/proto/go/coroutine/v1/coroutine.pb.go
@@ -37,6 +37,10 @@ type State struct {
 	// Functions is the set of functions, methods and closures referenced
 	// by the object graph.
 	Functions []*Function `protobuf:"bytes,4,rep,name=functions,proto3" json:"functions,omitempty"`
+	// Regions are encoded regions of memory.
+	Regions []*Region `protobuf:"bytes,5,rep,name=regions,proto3" json:"regions,omitempty"`
+	// Root is the root object.
+	Root *Region `protobuf:"bytes,6,opt,name=root,proto3" json:"root,omitempty"`
 }
 
 func (x *State) Reset() {
@@ -99,6 +103,20 @@ func (x *State) GetFunctions() []*Function {
 	return nil
 }
 
+func (x *State) GetRegions() []*Region {
+	if x != nil {
+		return x.Regions
+	}
+	return nil
+}
+
+func (x *State) GetRoot() *Region {
+	if x != nil {
+		return x.Root
+	}
+	return nil
+}
+
 // Build is info about the build in which a durable coroutine
 // is/was running.
 type Build struct {
@@ -164,6 +182,64 @@ func (x *Build) GetArch() string {
 	return ""
 }
 
+// Region is an encoded region of memory.
+type Region struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// Type is the type of the region.
+	Type int32 `protobuf:"varint,1,opt,name=type,proto3" json:"type,omitempty"`
+	// Data is the encoded contents of the memory region.
+	Data []byte `protobuf:"bytes,2,opt,name=data,proto3" json:"data,omitempty"`
+}
+
+func (x *Region) Reset() {
+	*x = Region{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_coroutine_v1_coroutine_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Region) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Region) ProtoMessage() {}
+
+func (x *Region) ProtoReflect() protoreflect.Message {
+	mi := &file_coroutine_v1_coroutine_proto_msgTypes[2]
+	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 Region.ProtoReflect.Descriptor instead.
+func (*Region) Descriptor() ([]byte, []int) {
+	return file_coroutine_v1_coroutine_proto_rawDescGZIP(), []int{2}
+}
+
+func (x *Region) GetType() int32 {
+	if x != nil {
+		return x.Type
+	}
+	return 0
+}
+
+func (x *Region) GetData() []byte {
+	if x != nil {
+		return x.Data
+	}
+	return nil
+}
+
 var File_coroutine_v1_coroutine_proto protoreflect.FileDescriptor
 
 var file_coroutine_v1_coroutine_proto_rawDesc = []byte{
@@ -173,7 +249,7 @@ var file_coroutine_v1_coroutine_proto_rawDesc = []byte{
 	0x72, 0x6f, 0x75, 0x74, 0x69, 0x6e, 0x65, 0x2f, 0x76, 0x31, 0x2f, 0x66, 0x75, 0x6e, 0x63, 0x74,
 	0x69, 0x6f, 0x6e, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x1a, 0x17, 0x63, 0x6f, 0x72, 0x6f, 0x75,
 	0x74, 0x69, 0x6e, 0x65, 0x2f, 0x76, 0x31, 0x2f, 0x74, 0x79, 0x70, 0x65, 0x2e, 0x70, 0x72, 0x6f,
-	0x74, 0x6f, 0x22, 0xa8, 0x01, 0x0a, 0x05, 0x53, 0x74, 0x61, 0x74, 0x65, 0x12, 0x29, 0x0a, 0x05,
+	0x74, 0x6f, 0x22, 0x82, 0x02, 0x0a, 0x05, 0x53, 0x74, 0x61, 0x74, 0x65, 0x12, 0x29, 0x0a, 0x05,
 	0x62, 0x75, 0x69, 0x6c, 0x64, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x13, 0x2e, 0x63, 0x6f,
 	0x72, 0x6f, 0x75, 0x74, 0x69, 0x6e, 0x65, 0x2e, 0x76, 0x31, 0x2e, 0x42, 0x75, 0x69, 0x6c, 0x64,
 	0x52, 0x05, 0x62, 0x75, 0x69, 0x6c, 0x64, 0x12, 0x14, 0x0a, 0x05, 0x73, 0x74, 0x61, 0x74, 0x65,
@@ -183,24 +259,32 @@ var file_coroutine_v1_coroutine_proto_rawDesc = []byte{
 	0x52, 0x05, 0x74, 0x79, 0x70, 0x65, 0x73, 0x12, 0x34, 0x0a, 0x09, 0x66, 0x75, 0x6e, 0x63, 0x74,
 	0x69, 0x6f, 0x6e, 0x73, 0x18, 0x04, 0x20, 0x03, 0x28, 0x0b, 0x32, 0x16, 0x2e, 0x63, 0x6f, 0x72,
 	0x6f, 0x75, 0x74, 0x69, 0x6e, 0x65, 0x2e, 0x76, 0x31, 0x2e, 0x46, 0x75, 0x6e, 0x63, 0x74, 0x69,
-	0x6f, 0x6e, 0x52, 0x09, 0x66, 0x75, 0x6e, 0x63, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x22, 0x3b, 0x0a,
-	0x05, 0x42, 0x75, 0x69, 0x6c, 0x64, 0x12, 0x0e, 0x0a, 0x02, 0x69, 0x64, 0x18, 0x01, 0x20, 0x01,
-	0x28, 0x09, 0x52, 0x02, 0x69, 0x64, 0x12, 0x0e, 0x0a, 0x02, 0x6f, 0x73, 0x18, 0x02, 0x20, 0x01,
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+	0x07, 0x72, 0x65, 0x67, 0x69, 0x6f, 0x6e, 0x73, 0x18, 0x05, 0x20, 0x03, 0x28, 0x0b, 0x32, 0x14,
+	0x2e, 0x63, 0x6f, 0x72, 0x6f, 0x75, 0x74, 0x69, 0x6e, 0x65, 0x2e, 0x76, 0x31, 0x2e, 0x52, 0x65,
+	0x67, 0x69, 0x6f, 0x6e, 0x52, 0x07, 0x72, 0x65, 0x67, 0x69, 0x6f, 0x6e, 0x73, 0x12, 0x28, 0x0a,
+	0x04, 0x72, 0x6f, 0x6f, 0x74, 0x18, 0x06, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x14, 0x2e, 0x63, 0x6f,
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+	0x12, 0x0e, 0x0a, 0x02, 0x6f, 0x73, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x02, 0x6f, 0x73,
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+	0x70, 0x65, 0x12, 0x12, 0x0a, 0x04, 0x64, 0x61, 0x74, 0x61, 0x18, 0x02, 0x20, 0x01, 0x28, 0x0c,
+	0x52, 0x04, 0x64, 0x61, 0x74, 0x61, 0x42, 0xbd, 0x01, 0x0a, 0x10, 0x63, 0x6f, 0x6d, 0x2e, 0x63,
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+	0x6f, 0x75, 0x74, 0x69, 0x6e, 0x65, 0x50, 0x72, 0x6f, 0x74, 0x6f, 0x50, 0x01, 0x5a, 0x48, 0x67,
+	0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x73, 0x74, 0x65, 0x61, 0x6c, 0x74,
+	0x68, 0x72, 0x6f, 0x63, 0x6b, 0x65, 0x74, 0x2f, 0x63, 0x6f, 0x72, 0x6f, 0x75, 0x74, 0x69, 0x6e,
+	0x65, 0x2f, 0x67, 0x65, 0x6e, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2f, 0x67, 0x6f, 0x2f, 0x63,
+	0x6f, 0x72, 0x6f, 0x75, 0x74, 0x69, 0x6e, 0x65, 0x2f, 0x76, 0x31, 0x3b, 0x63, 0x6f, 0x72, 0x6f,
+	0x75, 0x74, 0x69, 0x6e, 0x65, 0x76, 0x31, 0xa2, 0x02, 0x03, 0x43, 0x58, 0x58, 0xaa, 0x02, 0x0c,
+	0x43, 0x6f, 0x72, 0x6f, 0x75, 0x74, 0x69, 0x6e, 0x65, 0x2e, 0x56, 0x31, 0xca, 0x02, 0x0c, 0x43,
+	0x6f, 0x72, 0x6f, 0x75, 0x74, 0x69, 0x6e, 0x65, 0x5c, 0x56, 0x31, 0xe2, 0x02, 0x18, 0x43, 0x6f,
+	0x72, 0x6f, 0x75, 0x74, 0x69, 0x6e, 0x65, 0x5c, 0x56, 0x31, 0x5c, 0x47, 0x50, 0x42, 0x4d, 0x65,
+	0x74, 0x61, 0x64, 0x61, 0x74, 0x61, 0xea, 0x02, 0x0d, 0x43, 0x6f, 0x72, 0x6f, 0x75, 0x74, 0x69,
+	0x6e, 0x65, 0x3a, 0x3a, 0x56, 0x31, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -215,22 +299,25 @@ func file_coroutine_v1_coroutine_proto_rawDescGZIP() []byte {
 	return file_coroutine_v1_coroutine_proto_rawDescData
 }
 
-var file_coroutine_v1_coroutine_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
+var file_coroutine_v1_coroutine_proto_msgTypes = make([]protoimpl.MessageInfo, 3)
 var file_coroutine_v1_coroutine_proto_goTypes = []interface{}{
 	(*State)(nil),    // 0: coroutine.v1.State
 	(*Build)(nil),    // 1: coroutine.v1.Build
-	(*Type)(nil),     // 2: coroutine.v1.Type
-	(*Function)(nil), // 3: coroutine.v1.Function
+	(*Region)(nil),   // 2: coroutine.v1.Region
+	(*Type)(nil),     // 3: coroutine.v1.Type
+	(*Function)(nil), // 4: coroutine.v1.Function
 }
 var file_coroutine_v1_coroutine_proto_depIdxs = []int32{
 	1, // 0: coroutine.v1.State.build:type_name -> coroutine.v1.Build
-	2, // 1: coroutine.v1.State.types:type_name -> coroutine.v1.Type
-	3, // 2: coroutine.v1.State.functions:type_name -> coroutine.v1.Function
-	3, // [3:3] is the sub-list for method output_type
-	3, // [3:3] is the sub-list for method input_type
-	3, // [3:3] is the sub-list for extension type_name
-	3, // [3:3] is the sub-list for extension extendee
-	0, // [0:3] is the sub-list for field type_name
+	3, // 1: coroutine.v1.State.types:type_name -> coroutine.v1.Type
+	4, // 2: coroutine.v1.State.functions:type_name -> coroutine.v1.Function
+	2, // 3: coroutine.v1.State.regions:type_name -> coroutine.v1.Region
+	2, // 4: coroutine.v1.State.root:type_name -> coroutine.v1.Region
+	5, // [5:5] is the sub-list for method output_type
+	5, // [5:5] is the sub-list for method input_type
+	5, // [5:5] is the sub-list for extension type_name
+	5, // [5:5] is the sub-list for extension extendee
+	0, // [0:5] is the sub-list for field type_name
 }
 
 func init() { file_coroutine_v1_coroutine_proto_init() }
@@ -265,6 +352,18 @@ func file_coroutine_v1_coroutine_proto_init() {
 				return nil
 			}
 		}
+		file_coroutine_v1_coroutine_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Region); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
 	}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
@@ -272,7 +371,7 @@ func file_coroutine_v1_coroutine_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_coroutine_v1_coroutine_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   2,
+			NumMessages:   3,
 			NumExtensions: 0,
 			NumServices:   0,
 		},
diff --git a/gen/proto/go/coroutine/v1/coroutine_vtproto.pb.go b/gen/proto/go/coroutine/v1/coroutine_vtproto.pb.go
index 985cb08..47556b1 100644
--- a/gen/proto/go/coroutine/v1/coroutine_vtproto.pb.go
+++ b/gen/proto/go/coroutine/v1/coroutine_vtproto.pb.go
@@ -47,6 +47,28 @@ func (m *State) MarshalToSizedBufferVT(dAtA []byte) (int, error) {
 		i -= len(m.unknownFields)
 		copy(dAtA[i:], m.unknownFields)
 	}
+	if m.Root != nil {
+		size, err := m.Root.MarshalToSizedBufferVT(dAtA[:i])
+		if err != nil {
+			return 0, err
+		}
+		i -= size
+		i = encodeVarint(dAtA, i, uint64(size))
+		i--
+		dAtA[i] = 0x32
+	}
+	if len(m.Regions) > 0 {
+		for iNdEx := len(m.Regions) - 1; iNdEx >= 0; iNdEx-- {
+			size, err := m.Regions[iNdEx].MarshalToSizedBufferVT(dAtA[:i])
+			if err != nil {
+				return 0, err
+			}
+			i -= size
+			i = encodeVarint(dAtA, i, uint64(size))
+			i--
+			dAtA[i] = 0x2a
+		}
+	}
 	if len(m.Functions) > 0 {
 		for iNdEx := len(m.Functions) - 1; iNdEx >= 0; iNdEx-- {
 			size, err := m.Functions[iNdEx].MarshalToSizedBufferVT(dAtA[:i])
@@ -145,6 +167,51 @@ func (m *Build) MarshalToSizedBufferVT(dAtA []byte) (int, error) {
 	return len(dAtA) - i, nil
 }
 
+func (m *Region) MarshalVT() (dAtA []byte, err error) {
+	if m == nil {
+		return nil, nil
+	}
+	size := m.SizeVT()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBufferVT(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *Region) MarshalToVT(dAtA []byte) (int, error) {
+	size := m.SizeVT()
+	return m.MarshalToSizedBufferVT(dAtA[:size])
+}
+
+func (m *Region) MarshalToSizedBufferVT(dAtA []byte) (int, error) {
+	if m == nil {
+		return 0, nil
+	}
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if m.unknownFields != nil {
+		i -= len(m.unknownFields)
+		copy(dAtA[i:], m.unknownFields)
+	}
+	if len(m.Data) > 0 {
+		i -= len(m.Data)
+		copy(dAtA[i:], m.Data)
+		i = encodeVarint(dAtA, i, uint64(len(m.Data)))
+		i--
+		dAtA[i] = 0x12
+	}
+	if m.Type != 0 {
+		i = encodeVarint(dAtA, i, uint64(m.Type))
+		i--
+		dAtA[i] = 0x8
+	}
+	return len(dAtA) - i, nil
+}
+
 func (m *State) SizeVT() (n int) {
 	if m == nil {
 		return 0
@@ -171,6 +238,16 @@ func (m *State) SizeVT() (n int) {
 			n += 1 + l + sov(uint64(l))
 		}
 	}
+	if len(m.Regions) > 0 {
+		for _, e := range m.Regions {
+			l = e.SizeVT()
+			n += 1 + l + sov(uint64(l))
+		}
+	}
+	if m.Root != nil {
+		l = m.Root.SizeVT()
+		n += 1 + l + sov(uint64(l))
+	}
 	n += len(m.unknownFields)
 	return n
 }
@@ -197,6 +274,23 @@ func (m *Build) SizeVT() (n int) {
 	return n
 }
 
+func (m *Region) SizeVT() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	if m.Type != 0 {
+		n += 1 + sov(uint64(m.Type))
+	}
+	l = len(m.Data)
+	if l > 0 {
+		n += 1 + l + sov(uint64(l))
+	}
+	n += len(m.unknownFields)
+	return n
+}
+
 func (m *State) UnmarshalVT(dAtA []byte) error {
 	l := len(dAtA)
 	iNdEx := 0
@@ -364,6 +458,76 @@ func (m *State) UnmarshalVT(dAtA []byte) error {
 				return err
 			}
 			iNdEx = postIndex
+		case 5:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Regions", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflow
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return ErrInvalidLength
+			}
+			postIndex := iNdEx + msglen
+			if postIndex < 0 {
+				return ErrInvalidLength
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Regions = append(m.Regions, &Region{})
+			if err := m.Regions[len(m.Regions)-1].UnmarshalVT(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
+		case 6:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Root", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflow
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return ErrInvalidLength
+			}
+			postIndex := iNdEx + msglen
+			if postIndex < 0 {
+				return ErrInvalidLength
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			if m.Root == nil {
+				m.Root = &Region{}
+			}
+			if err := m.Root.UnmarshalVT(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
 		default:
 			iNdEx = preIndex
 			skippy, err := skip(dAtA[iNdEx:])
@@ -533,3 +697,107 @@ func (m *Build) UnmarshalVT(dAtA []byte) error {
 	}
 	return nil
 }
+func (m *Region) UnmarshalVT(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflow
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: Region: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: Region: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Type", wireType)
+			}
+			m.Type = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflow
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.Type |= int32(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		case 2:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Data", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflow
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLength
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex < 0 {
+				return ErrInvalidLength
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Data = append(m.Data[:0], dAtA[iNdEx:postIndex]...)
+			if m.Data == nil {
+				m.Data = []byte{}
+			}
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := skip(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
+				return ErrInvalidLength
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.unknownFields = append(m.unknownFields, dAtA[iNdEx:iNdEx+skippy]...)
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
diff --git a/proto/coroutine/v1/coroutine.proto b/proto/coroutine/v1/coroutine.proto
index d4d6cad..486fc18 100644
--- a/proto/coroutine/v1/coroutine.proto
+++ b/proto/coroutine/v1/coroutine.proto
@@ -21,6 +21,12 @@ message State {
   // Functions is the set of functions, methods and closures referenced
   // by the object graph.
   repeated Function functions = 4;
+
+  // Regions are encoded regions of memory.
+  repeated Region regions = 5;
+
+  // Root is the root object.
+  Region root = 6;
 }
 
 // Build is info about the build in which a durable coroutine
@@ -30,3 +36,12 @@ message Build {
   string os = 2;
   string arch = 3;
 }
+
+// Region is an encoded region of memory.
+message Region {
+  // Type is the type of the region.
+  int32 type = 1;
+
+  // Data is the encoded contents of the memory region.
+  bytes data = 2;
+}