diff --git a/backend/protos/xyz/block/ftl/hotreload/v1/hotreload.pb.go b/backend/protos/xyz/block/ftl/hotreload/v1/hotreload.pb.go
new file mode 100644
index 0000000000..fc39c2b4c2
--- /dev/null
+++ b/backend/protos/xyz/block/ftl/hotreload/v1/hotreload.pb.go
@@ -0,0 +1,765 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.36.1
+// 	protoc        (unknown)
+// source: xyz/block/ftl/hotreload/v1/hotreload.proto
+
+package hotreloadpb
+
+import (
+	v11 "github.com/block/ftl/backend/protos/xyz/block/ftl/language/v1"
+	v12 "github.com/block/ftl/backend/protos/xyz/block/ftl/v1"
+	v1 "github.com/block/ftl/common/protos/xyz/block/ftl/schema/v1"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type ReloadRequest struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	Force         bool                   `protobuf:"varint,1,opt,name=force,proto3" json:"force,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *ReloadRequest) Reset() {
+	*x = ReloadRequest{}
+	mi := &file_xyz_block_ftl_hotreload_v1_hotreload_proto_msgTypes[0]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *ReloadRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ReloadRequest) ProtoMessage() {}
+
+func (x *ReloadRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_xyz_block_ftl_hotreload_v1_hotreload_proto_msgTypes[0]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ReloadRequest.ProtoReflect.Descriptor instead.
+func (*ReloadRequest) Descriptor() ([]byte, []int) {
+	return file_xyz_block_ftl_hotreload_v1_hotreload_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *ReloadRequest) GetForce() bool {
+	if x != nil {
+		return x.Force
+	}
+	return false
+}
+
+type ReloadResponse struct {
+	state protoimpl.MessageState `protogen:"open.v1"`
+	// Types that are valid to be assigned to Event:
+	//
+	//	*ReloadResponse_ReloadNotRequired
+	//	*ReloadResponse_ReloadSuccess
+	//	*ReloadResponse_ReloadFailed
+	Event         isReloadResponse_Event `protobuf_oneof:"event"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *ReloadResponse) Reset() {
+	*x = ReloadResponse{}
+	mi := &file_xyz_block_ftl_hotreload_v1_hotreload_proto_msgTypes[1]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *ReloadResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ReloadResponse) ProtoMessage() {}
+
+func (x *ReloadResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_xyz_block_ftl_hotreload_v1_hotreload_proto_msgTypes[1]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ReloadResponse.ProtoReflect.Descriptor instead.
+func (*ReloadResponse) Descriptor() ([]byte, []int) {
+	return file_xyz_block_ftl_hotreload_v1_hotreload_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *ReloadResponse) GetEvent() isReloadResponse_Event {
+	if x != nil {
+		return x.Event
+	}
+	return nil
+}
+
+func (x *ReloadResponse) GetReloadNotRequired() *ReloadNotRequired {
+	if x != nil {
+		if x, ok := x.Event.(*ReloadResponse_ReloadNotRequired); ok {
+			return x.ReloadNotRequired
+		}
+	}
+	return nil
+}
+
+func (x *ReloadResponse) GetReloadSuccess() *ReloadSuccess {
+	if x != nil {
+		if x, ok := x.Event.(*ReloadResponse_ReloadSuccess); ok {
+			return x.ReloadSuccess
+		}
+	}
+	return nil
+}
+
+func (x *ReloadResponse) GetReloadFailed() *ReloadFailed {
+	if x != nil {
+		if x, ok := x.Event.(*ReloadResponse_ReloadFailed); ok {
+			return x.ReloadFailed
+		}
+	}
+	return nil
+}
+
+type isReloadResponse_Event interface {
+	isReloadResponse_Event()
+}
+
+type ReloadResponse_ReloadNotRequired struct {
+	ReloadNotRequired *ReloadNotRequired `protobuf:"bytes,1,opt,name=reload_not_required,json=reloadNotRequired,proto3,oneof"`
+}
+
+type ReloadResponse_ReloadSuccess struct {
+	ReloadSuccess *ReloadSuccess `protobuf:"bytes,2,opt,name=reload_success,json=reloadSuccess,proto3,oneof"`
+}
+
+type ReloadResponse_ReloadFailed struct {
+	ReloadFailed *ReloadFailed `protobuf:"bytes,3,opt,name=reload_failed,json=reloadFailed,proto3,oneof"`
+}
+
+func (*ReloadResponse_ReloadNotRequired) isReloadResponse_Event() {}
+
+func (*ReloadResponse_ReloadSuccess) isReloadResponse_Event() {}
+
+func (*ReloadResponse_ReloadFailed) isReloadResponse_Event() {}
+
+type WatchRequest struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *WatchRequest) Reset() {
+	*x = WatchRequest{}
+	mi := &file_xyz_block_ftl_hotreload_v1_hotreload_proto_msgTypes[2]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *WatchRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*WatchRequest) ProtoMessage() {}
+
+func (x *WatchRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_xyz_block_ftl_hotreload_v1_hotreload_proto_msgTypes[2]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use WatchRequest.ProtoReflect.Descriptor instead.
+func (*WatchRequest) Descriptor() ([]byte, []int) {
+	return file_xyz_block_ftl_hotreload_v1_hotreload_proto_rawDescGZIP(), []int{2}
+}
+
+type WatchResponse struct {
+	state protoimpl.MessageState `protogen:"open.v1"`
+	// Types that are valid to be assigned to Event:
+	//
+	//	*WatchResponse_ReloadSuccess
+	//	*WatchResponse_ReloadFailed
+	Event         isWatchResponse_Event `protobuf_oneof:"event"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *WatchResponse) Reset() {
+	*x = WatchResponse{}
+	mi := &file_xyz_block_ftl_hotreload_v1_hotreload_proto_msgTypes[3]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *WatchResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*WatchResponse) ProtoMessage() {}
+
+func (x *WatchResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_xyz_block_ftl_hotreload_v1_hotreload_proto_msgTypes[3]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use WatchResponse.ProtoReflect.Descriptor instead.
+func (*WatchResponse) Descriptor() ([]byte, []int) {
+	return file_xyz_block_ftl_hotreload_v1_hotreload_proto_rawDescGZIP(), []int{3}
+}
+
+func (x *WatchResponse) GetEvent() isWatchResponse_Event {
+	if x != nil {
+		return x.Event
+	}
+	return nil
+}
+
+func (x *WatchResponse) GetReloadSuccess() *ReloadSuccess {
+	if x != nil {
+		if x, ok := x.Event.(*WatchResponse_ReloadSuccess); ok {
+			return x.ReloadSuccess
+		}
+	}
+	return nil
+}
+
+func (x *WatchResponse) GetReloadFailed() *ReloadFailed {
+	if x != nil {
+		if x, ok := x.Event.(*WatchResponse_ReloadFailed); ok {
+			return x.ReloadFailed
+		}
+	}
+	return nil
+}
+
+type isWatchResponse_Event interface {
+	isWatchResponse_Event()
+}
+
+type WatchResponse_ReloadSuccess struct {
+	ReloadSuccess *ReloadSuccess `protobuf:"bytes,1,opt,name=reload_success,json=reloadSuccess,proto3,oneof"`
+}
+
+type WatchResponse_ReloadFailed struct {
+	ReloadFailed *ReloadFailed `protobuf:"bytes,2,opt,name=reload_failed,json=reloadFailed,proto3,oneof"`
+}
+
+func (*WatchResponse_ReloadSuccess) isWatchResponse_Event() {}
+
+func (*WatchResponse_ReloadFailed) isWatchResponse_Event() {}
+
+type RunnerInfoRequest struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	Address       string                 `protobuf:"bytes,1,opt,name=address,proto3" json:"address,omitempty"`
+	Deployment    string                 `protobuf:"bytes,2,opt,name=deployment,proto3" json:"deployment,omitempty"`
+	Databases     []*Database            `protobuf:"bytes,3,rep,name=databases,proto3" json:"databases,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *RunnerInfoRequest) Reset() {
+	*x = RunnerInfoRequest{}
+	mi := &file_xyz_block_ftl_hotreload_v1_hotreload_proto_msgTypes[4]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *RunnerInfoRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*RunnerInfoRequest) ProtoMessage() {}
+
+func (x *RunnerInfoRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_xyz_block_ftl_hotreload_v1_hotreload_proto_msgTypes[4]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use RunnerInfoRequest.ProtoReflect.Descriptor instead.
+func (*RunnerInfoRequest) Descriptor() ([]byte, []int) {
+	return file_xyz_block_ftl_hotreload_v1_hotreload_proto_rawDescGZIP(), []int{4}
+}
+
+func (x *RunnerInfoRequest) GetAddress() string {
+	if x != nil {
+		return x.Address
+	}
+	return ""
+}
+
+func (x *RunnerInfoRequest) GetDeployment() string {
+	if x != nil {
+		return x.Deployment
+	}
+	return ""
+}
+
+func (x *RunnerInfoRequest) GetDatabases() []*Database {
+	if x != nil {
+		return x.Databases
+	}
+	return nil
+}
+
+type Database struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	Name          string                 `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
+	Address       string                 `protobuf:"bytes,2,opt,name=address,proto3" json:"address,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *Database) Reset() {
+	*x = Database{}
+	mi := &file_xyz_block_ftl_hotreload_v1_hotreload_proto_msgTypes[5]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *Database) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Database) ProtoMessage() {}
+
+func (x *Database) ProtoReflect() protoreflect.Message {
+	mi := &file_xyz_block_ftl_hotreload_v1_hotreload_proto_msgTypes[5]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Database.ProtoReflect.Descriptor instead.
+func (*Database) Descriptor() ([]byte, []int) {
+	return file_xyz_block_ftl_hotreload_v1_hotreload_proto_rawDescGZIP(), []int{5}
+}
+
+func (x *Database) GetName() string {
+	if x != nil {
+		return x.Name
+	}
+	return ""
+}
+
+func (x *Database) GetAddress() string {
+	if x != nil {
+		return x.Address
+	}
+	return ""
+}
+
+type RunnerInfoResponse struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *RunnerInfoResponse) Reset() {
+	*x = RunnerInfoResponse{}
+	mi := &file_xyz_block_ftl_hotreload_v1_hotreload_proto_msgTypes[6]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *RunnerInfoResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*RunnerInfoResponse) ProtoMessage() {}
+
+func (x *RunnerInfoResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_xyz_block_ftl_hotreload_v1_hotreload_proto_msgTypes[6]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use RunnerInfoResponse.ProtoReflect.Descriptor instead.
+func (*RunnerInfoResponse) Descriptor() ([]byte, []int) {
+	return file_xyz_block_ftl_hotreload_v1_hotreload_proto_rawDescGZIP(), []int{6}
+}
+
+type ReloadNotRequired struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *ReloadNotRequired) Reset() {
+	*x = ReloadNotRequired{}
+	mi := &file_xyz_block_ftl_hotreload_v1_hotreload_proto_msgTypes[7]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *ReloadNotRequired) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ReloadNotRequired) ProtoMessage() {}
+
+func (x *ReloadNotRequired) ProtoReflect() protoreflect.Message {
+	mi := &file_xyz_block_ftl_hotreload_v1_hotreload_proto_msgTypes[7]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ReloadNotRequired.ProtoReflect.Descriptor instead.
+func (*ReloadNotRequired) Descriptor() ([]byte, []int) {
+	return file_xyz_block_ftl_hotreload_v1_hotreload_proto_rawDescGZIP(), []int{7}
+}
+
+type ReloadSuccess struct {
+	state protoimpl.MessageState `protogen:"open.v1"`
+	// Module schema for the built module
+	Module *v1.Module `protobuf:"bytes,1,opt,name=module,proto3" json:"module,omitempty"`
+	// Module schema for the built module
+	Errors        *v11.ErrorList `protobuf:"bytes,2,opt,name=errors,proto3" json:"errors,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *ReloadSuccess) Reset() {
+	*x = ReloadSuccess{}
+	mi := &file_xyz_block_ftl_hotreload_v1_hotreload_proto_msgTypes[8]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *ReloadSuccess) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ReloadSuccess) ProtoMessage() {}
+
+func (x *ReloadSuccess) ProtoReflect() protoreflect.Message {
+	mi := &file_xyz_block_ftl_hotreload_v1_hotreload_proto_msgTypes[8]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ReloadSuccess.ProtoReflect.Descriptor instead.
+func (*ReloadSuccess) Descriptor() ([]byte, []int) {
+	return file_xyz_block_ftl_hotreload_v1_hotreload_proto_rawDescGZIP(), []int{8}
+}
+
+func (x *ReloadSuccess) GetModule() *v1.Module {
+	if x != nil {
+		return x.Module
+	}
+	return nil
+}
+
+func (x *ReloadSuccess) GetErrors() *v11.ErrorList {
+	if x != nil {
+		return x.Errors
+	}
+	return nil
+}
+
+type ReloadFailed struct {
+	state protoimpl.MessageState `protogen:"open.v1"`
+	// Module schema for the built module
+	Errors        *v11.ErrorList `protobuf:"bytes,1,opt,name=errors,proto3" json:"errors,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *ReloadFailed) Reset() {
+	*x = ReloadFailed{}
+	mi := &file_xyz_block_ftl_hotreload_v1_hotreload_proto_msgTypes[9]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *ReloadFailed) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ReloadFailed) ProtoMessage() {}
+
+func (x *ReloadFailed) ProtoReflect() protoreflect.Message {
+	mi := &file_xyz_block_ftl_hotreload_v1_hotreload_proto_msgTypes[9]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ReloadFailed.ProtoReflect.Descriptor instead.
+func (*ReloadFailed) Descriptor() ([]byte, []int) {
+	return file_xyz_block_ftl_hotreload_v1_hotreload_proto_rawDescGZIP(), []int{9}
+}
+
+func (x *ReloadFailed) GetErrors() *v11.ErrorList {
+	if x != nil {
+		return x.Errors
+	}
+	return nil
+}
+
+var File_xyz_block_ftl_hotreload_v1_hotreload_proto protoreflect.FileDescriptor
+
+var file_xyz_block_ftl_hotreload_v1_hotreload_proto_rawDesc = []byte{
+	0x0a, 0x2a, 0x78, 0x79, 0x7a, 0x2f, 0x62, 0x6c, 0x6f, 0x63, 0x6b, 0x2f, 0x66, 0x74, 0x6c, 0x2f,
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+}
+
+var (
+	file_xyz_block_ftl_hotreload_v1_hotreload_proto_rawDescOnce sync.Once
+	file_xyz_block_ftl_hotreload_v1_hotreload_proto_rawDescData = file_xyz_block_ftl_hotreload_v1_hotreload_proto_rawDesc
+)
+
+func file_xyz_block_ftl_hotreload_v1_hotreload_proto_rawDescGZIP() []byte {
+	file_xyz_block_ftl_hotreload_v1_hotreload_proto_rawDescOnce.Do(func() {
+		file_xyz_block_ftl_hotreload_v1_hotreload_proto_rawDescData = protoimpl.X.CompressGZIP(file_xyz_block_ftl_hotreload_v1_hotreload_proto_rawDescData)
+	})
+	return file_xyz_block_ftl_hotreload_v1_hotreload_proto_rawDescData
+}
+
+var file_xyz_block_ftl_hotreload_v1_hotreload_proto_msgTypes = make([]protoimpl.MessageInfo, 10)
+var file_xyz_block_ftl_hotreload_v1_hotreload_proto_goTypes = []any{
+	(*ReloadRequest)(nil),      // 0: xyz.block.ftl.hotreload.v1.ReloadRequest
+	(*ReloadResponse)(nil),     // 1: xyz.block.ftl.hotreload.v1.ReloadResponse
+	(*WatchRequest)(nil),       // 2: xyz.block.ftl.hotreload.v1.WatchRequest
+	(*WatchResponse)(nil),      // 3: xyz.block.ftl.hotreload.v1.WatchResponse
+	(*RunnerInfoRequest)(nil),  // 4: xyz.block.ftl.hotreload.v1.RunnerInfoRequest
+	(*Database)(nil),           // 5: xyz.block.ftl.hotreload.v1.Database
+	(*RunnerInfoResponse)(nil), // 6: xyz.block.ftl.hotreload.v1.RunnerInfoResponse
+	(*ReloadNotRequired)(nil),  // 7: xyz.block.ftl.hotreload.v1.ReloadNotRequired
+	(*ReloadSuccess)(nil),      // 8: xyz.block.ftl.hotreload.v1.ReloadSuccess
+	(*ReloadFailed)(nil),       // 9: xyz.block.ftl.hotreload.v1.ReloadFailed
+	(*v1.Module)(nil),          // 10: xyz.block.ftl.schema.v1.Module
+	(*v11.ErrorList)(nil),      // 11: xyz.block.ftl.language.v1.ErrorList
+	(*v12.PingRequest)(nil),    // 12: xyz.block.ftl.v1.PingRequest
+	(*v12.PingResponse)(nil),   // 13: xyz.block.ftl.v1.PingResponse
+}
+var file_xyz_block_ftl_hotreload_v1_hotreload_proto_depIdxs = []int32{
+	7,  // 0: xyz.block.ftl.hotreload.v1.ReloadResponse.reload_not_required:type_name -> xyz.block.ftl.hotreload.v1.ReloadNotRequired
+	8,  // 1: xyz.block.ftl.hotreload.v1.ReloadResponse.reload_success:type_name -> xyz.block.ftl.hotreload.v1.ReloadSuccess
+	9,  // 2: xyz.block.ftl.hotreload.v1.ReloadResponse.reload_failed:type_name -> xyz.block.ftl.hotreload.v1.ReloadFailed
+	8,  // 3: xyz.block.ftl.hotreload.v1.WatchResponse.reload_success:type_name -> xyz.block.ftl.hotreload.v1.ReloadSuccess
+	9,  // 4: xyz.block.ftl.hotreload.v1.WatchResponse.reload_failed:type_name -> xyz.block.ftl.hotreload.v1.ReloadFailed
+	5,  // 5: xyz.block.ftl.hotreload.v1.RunnerInfoRequest.databases:type_name -> xyz.block.ftl.hotreload.v1.Database
+	10, // 6: xyz.block.ftl.hotreload.v1.ReloadSuccess.module:type_name -> xyz.block.ftl.schema.v1.Module
+	11, // 7: xyz.block.ftl.hotreload.v1.ReloadSuccess.errors:type_name -> xyz.block.ftl.language.v1.ErrorList
+	11, // 8: xyz.block.ftl.hotreload.v1.ReloadFailed.errors:type_name -> xyz.block.ftl.language.v1.ErrorList
+	12, // 9: xyz.block.ftl.hotreload.v1.HotReloadService.Ping:input_type -> xyz.block.ftl.v1.PingRequest
+	0,  // 10: xyz.block.ftl.hotreload.v1.HotReloadService.Reload:input_type -> xyz.block.ftl.hotreload.v1.ReloadRequest
+	2,  // 11: xyz.block.ftl.hotreload.v1.HotReloadService.Watch:input_type -> xyz.block.ftl.hotreload.v1.WatchRequest
+	4,  // 12: xyz.block.ftl.hotreload.v1.HotReloadService.RunnerInfo:input_type -> xyz.block.ftl.hotreload.v1.RunnerInfoRequest
+	13, // 13: xyz.block.ftl.hotreload.v1.HotReloadService.Ping:output_type -> xyz.block.ftl.v1.PingResponse
+	1,  // 14: xyz.block.ftl.hotreload.v1.HotReloadService.Reload:output_type -> xyz.block.ftl.hotreload.v1.ReloadResponse
+	3,  // 15: xyz.block.ftl.hotreload.v1.HotReloadService.Watch:output_type -> xyz.block.ftl.hotreload.v1.WatchResponse
+	6,  // 16: xyz.block.ftl.hotreload.v1.HotReloadService.RunnerInfo:output_type -> xyz.block.ftl.hotreload.v1.RunnerInfoResponse
+	13, // [13:17] is the sub-list for method output_type
+	9,  // [9:13] is the sub-list for method input_type
+	9,  // [9:9] is the sub-list for extension type_name
+	9,  // [9:9] is the sub-list for extension extendee
+	0,  // [0:9] is the sub-list for field type_name
+}
+
+func init() { file_xyz_block_ftl_hotreload_v1_hotreload_proto_init() }
+func file_xyz_block_ftl_hotreload_v1_hotreload_proto_init() {
+	if File_xyz_block_ftl_hotreload_v1_hotreload_proto != nil {
+		return
+	}
+	file_xyz_block_ftl_hotreload_v1_hotreload_proto_msgTypes[1].OneofWrappers = []any{
+		(*ReloadResponse_ReloadNotRequired)(nil),
+		(*ReloadResponse_ReloadSuccess)(nil),
+		(*ReloadResponse_ReloadFailed)(nil),
+	}
+	file_xyz_block_ftl_hotreload_v1_hotreload_proto_msgTypes[3].OneofWrappers = []any{
+		(*WatchResponse_ReloadSuccess)(nil),
+		(*WatchResponse_ReloadFailed)(nil),
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_xyz_block_ftl_hotreload_v1_hotreload_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   10,
+			NumExtensions: 0,
+			NumServices:   1,
+		},
+		GoTypes:           file_xyz_block_ftl_hotreload_v1_hotreload_proto_goTypes,
+		DependencyIndexes: file_xyz_block_ftl_hotreload_v1_hotreload_proto_depIdxs,
+		MessageInfos:      file_xyz_block_ftl_hotreload_v1_hotreload_proto_msgTypes,
+	}.Build()
+	File_xyz_block_ftl_hotreload_v1_hotreload_proto = out.File
+	file_xyz_block_ftl_hotreload_v1_hotreload_proto_rawDesc = nil
+	file_xyz_block_ftl_hotreload_v1_hotreload_proto_goTypes = nil
+	file_xyz_block_ftl_hotreload_v1_hotreload_proto_depIdxs = nil
+}
diff --git a/backend/protos/xyz/block/ftl/hotreload/v1/hotreload.proto b/backend/protos/xyz/block/ftl/hotreload/v1/hotreload.proto
new file mode 100644
index 0000000000..4e346ea556
--- /dev/null
+++ b/backend/protos/xyz/block/ftl/hotreload/v1/hotreload.proto
@@ -0,0 +1,77 @@
+syntax = "proto3";
+
+package xyz.block.ftl.hotreload.v1;
+
+import "xyz/block/ftl/language/v1/language.proto";
+import "xyz/block/ftl/schema/v1/schema.proto";
+import "xyz/block/ftl/v1/ftl.proto";
+
+option go_package = "github.com/block/ftl/backend/protos/xyz/block/ftl/hotreload/v1;hotreloadpb";
+option java_multiple_files = true;
+
+message ReloadRequest {
+  bool force = 1;
+}
+
+message ReloadResponse {
+  oneof event {
+    ReloadNotRequired reload_not_required = 1;
+    ReloadSuccess reload_success = 2;
+    ReloadFailed reload_failed = 3;
+  }
+}
+
+message WatchRequest {}
+
+message WatchResponse {
+  oneof event {
+    ReloadSuccess reload_success = 1;
+    ReloadFailed reload_failed = 2;
+  }
+}
+
+message RunnerInfoRequest {
+  string address = 1;
+  string deployment = 2;
+  repeated Database databases = 3;
+}
+
+message Database {
+  string name = 1;
+  string address = 2;
+}
+
+message RunnerInfoResponse {}
+
+message ReloadNotRequired {}
+
+message ReloadSuccess {
+  // Module schema for the built module
+  ftl.schema.v1.Module module = 1;
+  // Module schema for the built module
+  ftl.language.v1.ErrorList errors = 2;
+}
+
+message ReloadFailed {
+  // Module schema for the built module
+  ftl.language.v1.ErrorList errors = 1;
+}
+
+// HotReloadService is for communication between a language plugin a language runtime that can perform a hot reload
+service HotReloadService {
+  // Ping service for readiness.
+  rpc Ping(xyz.block.ftl.v1.PingRequest) returns (xyz.block.ftl.v1.PingResponse) {
+    option idempotency_level = NO_SIDE_EFFECTS;
+  }
+
+  // Forces an explicit Reload from the plugin. This is useful for when the plugin needs to trigger a Reload,
+  // such as when the Reload context changes.
+  //
+  rpc Reload(ReloadRequest) returns (ReloadResponse);
+
+  // Watch for hot reloads not initiated by an explicit Reload call.
+  rpc Watch(WatchRequest) returns (stream WatchResponse);
+
+  // Invoked by the runner to provide runner information to the plugin.
+  rpc RunnerInfo(RunnerInfoRequest) returns (RunnerInfoResponse);
+}
diff --git a/backend/protos/xyz/block/ftl/hotreload/v1/hotreloadpbconnect/hotreload.connect.go b/backend/protos/xyz/block/ftl/hotreload/v1/hotreloadpbconnect/hotreload.connect.go
new file mode 100644
index 0000000000..667b1795ad
--- /dev/null
+++ b/backend/protos/xyz/block/ftl/hotreload/v1/hotreloadpbconnect/hotreload.connect.go
@@ -0,0 +1,197 @@
+// Code generated by protoc-gen-connect-go. DO NOT EDIT.
+//
+// Source: xyz/block/ftl/hotreload/v1/hotreload.proto
+
+package hotreloadpbconnect
+
+import (
+	connect "connectrpc.com/connect"
+	context "context"
+	errors "errors"
+	v11 "github.com/block/ftl/backend/protos/xyz/block/ftl/hotreload/v1"
+	v1 "github.com/block/ftl/backend/protos/xyz/block/ftl/v1"
+	http "net/http"
+	strings "strings"
+)
+
+// This is a compile-time assertion to ensure that this generated file and the connect package are
+// compatible. If you get a compiler error that this constant is not defined, this code was
+// generated with a version of connect newer than the one compiled into your binary. You can fix the
+// problem by either regenerating this code with an older version of connect or updating the connect
+// version compiled into your binary.
+const _ = connect.IsAtLeastVersion1_7_0
+
+const (
+	// HotReloadServiceName is the fully-qualified name of the HotReloadService service.
+	HotReloadServiceName = "xyz.block.ftl.hotreload.v1.HotReloadService"
+)
+
+// These constants are the fully-qualified names of the RPCs defined in this package. They're
+// exposed at runtime as Spec.Procedure and as the final two segments of the HTTP route.
+//
+// Note that these are different from the fully-qualified method names used by
+// google.golang.org/protobuf/reflect/protoreflect. To convert from these constants to
+// reflection-formatted method names, remove the leading slash and convert the remaining slash to a
+// period.
+const (
+	// HotReloadServicePingProcedure is the fully-qualified name of the HotReloadService's Ping RPC.
+	HotReloadServicePingProcedure = "/xyz.block.ftl.hotreload.v1.HotReloadService/Ping"
+	// HotReloadServiceReloadProcedure is the fully-qualified name of the HotReloadService's Reload RPC.
+	HotReloadServiceReloadProcedure = "/xyz.block.ftl.hotreload.v1.HotReloadService/Reload"
+	// HotReloadServiceWatchProcedure is the fully-qualified name of the HotReloadService's Watch RPC.
+	HotReloadServiceWatchProcedure = "/xyz.block.ftl.hotreload.v1.HotReloadService/Watch"
+	// HotReloadServiceRunnerInfoProcedure is the fully-qualified name of the HotReloadService's
+	// RunnerInfo RPC.
+	HotReloadServiceRunnerInfoProcedure = "/xyz.block.ftl.hotreload.v1.HotReloadService/RunnerInfo"
+)
+
+// HotReloadServiceClient is a client for the xyz.block.ftl.hotreload.v1.HotReloadService service.
+type HotReloadServiceClient interface {
+	// Ping service for readiness.
+	Ping(context.Context, *connect.Request[v1.PingRequest]) (*connect.Response[v1.PingResponse], error)
+	// Forces an explicit Reload from the plugin. This is useful for when the plugin needs to trigger a Reload,
+	// such as when the Reload context changes.
+	Reload(context.Context, *connect.Request[v11.ReloadRequest]) (*connect.Response[v11.ReloadResponse], error)
+	// Watch for hot reloads not initiated by an explicit Reload call.
+	Watch(context.Context, *connect.Request[v11.WatchRequest]) (*connect.ServerStreamForClient[v11.WatchResponse], error)
+	// Invoked by the runner to provide runner information to the plugin.
+	RunnerInfo(context.Context, *connect.Request[v11.RunnerInfoRequest]) (*connect.Response[v11.RunnerInfoResponse], error)
+}
+
+// NewHotReloadServiceClient constructs a client for the xyz.block.ftl.hotreload.v1.HotReloadService
+// service. By default, it uses the Connect protocol with the binary Protobuf Codec, asks for
+// gzipped responses, and sends uncompressed requests. To use the gRPC or gRPC-Web protocols, supply
+// the connect.WithGRPC() or connect.WithGRPCWeb() options.
+//
+// The URL supplied here should be the base URL for the Connect or gRPC server (for example,
+// http://api.acme.com or https://acme.com/grpc).
+func NewHotReloadServiceClient(httpClient connect.HTTPClient, baseURL string, opts ...connect.ClientOption) HotReloadServiceClient {
+	baseURL = strings.TrimRight(baseURL, "/")
+	return &hotReloadServiceClient{
+		ping: connect.NewClient[v1.PingRequest, v1.PingResponse](
+			httpClient,
+			baseURL+HotReloadServicePingProcedure,
+			connect.WithIdempotency(connect.IdempotencyNoSideEffects),
+			connect.WithClientOptions(opts...),
+		),
+		reload: connect.NewClient[v11.ReloadRequest, v11.ReloadResponse](
+			httpClient,
+			baseURL+HotReloadServiceReloadProcedure,
+			opts...,
+		),
+		watch: connect.NewClient[v11.WatchRequest, v11.WatchResponse](
+			httpClient,
+			baseURL+HotReloadServiceWatchProcedure,
+			opts...,
+		),
+		runnerInfo: connect.NewClient[v11.RunnerInfoRequest, v11.RunnerInfoResponse](
+			httpClient,
+			baseURL+HotReloadServiceRunnerInfoProcedure,
+			opts...,
+		),
+	}
+}
+
+// hotReloadServiceClient implements HotReloadServiceClient.
+type hotReloadServiceClient struct {
+	ping       *connect.Client[v1.PingRequest, v1.PingResponse]
+	reload     *connect.Client[v11.ReloadRequest, v11.ReloadResponse]
+	watch      *connect.Client[v11.WatchRequest, v11.WatchResponse]
+	runnerInfo *connect.Client[v11.RunnerInfoRequest, v11.RunnerInfoResponse]
+}
+
+// Ping calls xyz.block.ftl.hotreload.v1.HotReloadService.Ping.
+func (c *hotReloadServiceClient) Ping(ctx context.Context, req *connect.Request[v1.PingRequest]) (*connect.Response[v1.PingResponse], error) {
+	return c.ping.CallUnary(ctx, req)
+}
+
+// Reload calls xyz.block.ftl.hotreload.v1.HotReloadService.Reload.
+func (c *hotReloadServiceClient) Reload(ctx context.Context, req *connect.Request[v11.ReloadRequest]) (*connect.Response[v11.ReloadResponse], error) {
+	return c.reload.CallUnary(ctx, req)
+}
+
+// Watch calls xyz.block.ftl.hotreload.v1.HotReloadService.Watch.
+func (c *hotReloadServiceClient) Watch(ctx context.Context, req *connect.Request[v11.WatchRequest]) (*connect.ServerStreamForClient[v11.WatchResponse], error) {
+	return c.watch.CallServerStream(ctx, req)
+}
+
+// RunnerInfo calls xyz.block.ftl.hotreload.v1.HotReloadService.RunnerInfo.
+func (c *hotReloadServiceClient) RunnerInfo(ctx context.Context, req *connect.Request[v11.RunnerInfoRequest]) (*connect.Response[v11.RunnerInfoResponse], error) {
+	return c.runnerInfo.CallUnary(ctx, req)
+}
+
+// HotReloadServiceHandler is an implementation of the xyz.block.ftl.hotreload.v1.HotReloadService
+// service.
+type HotReloadServiceHandler interface {
+	// Ping service for readiness.
+	Ping(context.Context, *connect.Request[v1.PingRequest]) (*connect.Response[v1.PingResponse], error)
+	// Forces an explicit Reload from the plugin. This is useful for when the plugin needs to trigger a Reload,
+	// such as when the Reload context changes.
+	Reload(context.Context, *connect.Request[v11.ReloadRequest]) (*connect.Response[v11.ReloadResponse], error)
+	// Watch for hot reloads not initiated by an explicit Reload call.
+	Watch(context.Context, *connect.Request[v11.WatchRequest], *connect.ServerStream[v11.WatchResponse]) error
+	// Invoked by the runner to provide runner information to the plugin.
+	RunnerInfo(context.Context, *connect.Request[v11.RunnerInfoRequest]) (*connect.Response[v11.RunnerInfoResponse], error)
+}
+
+// NewHotReloadServiceHandler builds an HTTP handler from the service implementation. It returns the
+// path on which to mount the handler and the handler itself.
+//
+// By default, handlers support the Connect, gRPC, and gRPC-Web protocols with the binary Protobuf
+// and JSON codecs. They also support gzip compression.
+func NewHotReloadServiceHandler(svc HotReloadServiceHandler, opts ...connect.HandlerOption) (string, http.Handler) {
+	hotReloadServicePingHandler := connect.NewUnaryHandler(
+		HotReloadServicePingProcedure,
+		svc.Ping,
+		connect.WithIdempotency(connect.IdempotencyNoSideEffects),
+		connect.WithHandlerOptions(opts...),
+	)
+	hotReloadServiceReloadHandler := connect.NewUnaryHandler(
+		HotReloadServiceReloadProcedure,
+		svc.Reload,
+		opts...,
+	)
+	hotReloadServiceWatchHandler := connect.NewServerStreamHandler(
+		HotReloadServiceWatchProcedure,
+		svc.Watch,
+		opts...,
+	)
+	hotReloadServiceRunnerInfoHandler := connect.NewUnaryHandler(
+		HotReloadServiceRunnerInfoProcedure,
+		svc.RunnerInfo,
+		opts...,
+	)
+	return "/xyz.block.ftl.hotreload.v1.HotReloadService/", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		switch r.URL.Path {
+		case HotReloadServicePingProcedure:
+			hotReloadServicePingHandler.ServeHTTP(w, r)
+		case HotReloadServiceReloadProcedure:
+			hotReloadServiceReloadHandler.ServeHTTP(w, r)
+		case HotReloadServiceWatchProcedure:
+			hotReloadServiceWatchHandler.ServeHTTP(w, r)
+		case HotReloadServiceRunnerInfoProcedure:
+			hotReloadServiceRunnerInfoHandler.ServeHTTP(w, r)
+		default:
+			http.NotFound(w, r)
+		}
+	})
+}
+
+// UnimplementedHotReloadServiceHandler returns CodeUnimplemented from all methods.
+type UnimplementedHotReloadServiceHandler struct{}
+
+func (UnimplementedHotReloadServiceHandler) Ping(context.Context, *connect.Request[v1.PingRequest]) (*connect.Response[v1.PingResponse], error) {
+	return nil, connect.NewError(connect.CodeUnimplemented, errors.New("xyz.block.ftl.hotreload.v1.HotReloadService.Ping is not implemented"))
+}
+
+func (UnimplementedHotReloadServiceHandler) Reload(context.Context, *connect.Request[v11.ReloadRequest]) (*connect.Response[v11.ReloadResponse], error) {
+	return nil, connect.NewError(connect.CodeUnimplemented, errors.New("xyz.block.ftl.hotreload.v1.HotReloadService.Reload is not implemented"))
+}
+
+func (UnimplementedHotReloadServiceHandler) Watch(context.Context, *connect.Request[v11.WatchRequest], *connect.ServerStream[v11.WatchResponse]) error {
+	return connect.NewError(connect.CodeUnimplemented, errors.New("xyz.block.ftl.hotreload.v1.HotReloadService.Watch is not implemented"))
+}
+
+func (UnimplementedHotReloadServiceHandler) RunnerInfo(context.Context, *connect.Request[v11.RunnerInfoRequest]) (*connect.Response[v11.RunnerInfoResponse], error) {
+	return nil, connect.NewError(connect.CodeUnimplemented, errors.New("xyz.block.ftl.hotreload.v1.HotReloadService.RunnerInfo is not implemented"))
+}
diff --git a/backend/protos/xyz/block/ftl/language/v1/language.pb.go b/backend/protos/xyz/block/ftl/language/v1/language.pb.go
index 745bbf2765..e6ea1d5e23 100644
--- a/backend/protos/xyz/block/ftl/language/v1/language.pb.go
+++ b/backend/protos/xyz/block/ftl/language/v1/language.pb.go
@@ -1271,10 +1271,10 @@ type BuildSuccess struct {
 	DevEndpoint *string `protobuf:"bytes,7,opt,name=dev_endpoint,json=devEndpoint,proto3,oneof" json:"dev_endpoint,omitempty"`
 	// Dev mode debug port
 	DebugPort *int32 `protobuf:"varint,8,opt,name=debug_port,json=debugPort,proto3,oneof" json:"debug_port,omitempty"`
-	// Dev mode runner info file, this file is used to allow the runner to communicate provisioner info back to the plugin
-	DevRunnerInfoFile *string `protobuf:"bytes,9,opt,name=dev_runner_info_file,json=devRunnerInfoFile,proto3,oneof" json:"dev_runner_info_file,omitempty"`
-	unknownFields     protoimpl.UnknownFields
-	sizeCache         protoimpl.SizeCache
+	// Dev mode hot reload endpoint, this is used to allow the runner to communicate info back to the running process
+	DevHotReloadEndpoint *string `protobuf:"bytes,9,opt,name=dev_hot_reload_endpoint,json=devHotReloadEndpoint,proto3,oneof" json:"dev_hot_reload_endpoint,omitempty"`
+	unknownFields        protoimpl.UnknownFields
+	sizeCache            protoimpl.SizeCache
 }
 
 func (x *BuildSuccess) Reset() {
@@ -1363,9 +1363,9 @@ func (x *BuildSuccess) GetDebugPort() int32 {
 	return 0
 }
 
-func (x *BuildSuccess) GetDevRunnerInfoFile() string {
-	if x != nil && x.DevRunnerInfoFile != nil {
-		return *x.DevRunnerInfoFile
+func (x *BuildSuccess) GetDevHotReloadEndpoint() string {
+	if x != nil && x.DevHotReloadEndpoint != nil {
+		return *x.DevHotReloadEndpoint
 	}
 	return ""
 }
@@ -2047,7 +2047,7 @@ var file_xyz_block_ftl_language_v1_language_proto_rawDesc = []byte{
 	0x41, 0x75, 0x74, 0x6f, 0x52, 0x65, 0x62, 0x75, 0x69, 0x6c, 0x64, 0x53, 0x74, 0x61, 0x72, 0x74,
 	0x65, 0x64, 0x12, 0x1d, 0x0a, 0x0a, 0x63, 0x6f, 0x6e, 0x74, 0x65, 0x78, 0x74, 0x5f, 0x69, 0x64,
 	0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x09, 0x63, 0x6f, 0x6e, 0x74, 0x65, 0x78, 0x74, 0x49,
-	0x64, 0x22, 0xcc, 0x03, 0x0a, 0x0c, 0x42, 0x75, 0x69, 0x6c, 0x64, 0x53, 0x75, 0x63, 0x63, 0x65,
+	0x64, 0x22, 0xd5, 0x03, 0x0a, 0x0c, 0x42, 0x75, 0x69, 0x6c, 0x64, 0x53, 0x75, 0x63, 0x63, 0x65,
 	0x73, 0x73, 0x12, 0x1d, 0x0a, 0x0a, 0x63, 0x6f, 0x6e, 0x74, 0x65, 0x78, 0x74, 0x5f, 0x69, 0x64,
 	0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x09, 0x63, 0x6f, 0x6e, 0x74, 0x65, 0x78, 0x74, 0x49,
 	0x64, 0x12, 0x30, 0x0a, 0x14, 0x69, 0x73, 0x5f, 0x61, 0x75, 0x74, 0x6f, 0x6d, 0x61, 0x74, 0x69,
@@ -2069,154 +2069,155 @@ var file_xyz_block_ftl_language_v1_language_proto_rawDesc = []byte{
 	0x65, 0x76, 0x45, 0x6e, 0x64, 0x70, 0x6f, 0x69, 0x6e, 0x74, 0x88, 0x01, 0x01, 0x12, 0x22, 0x0a,
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 	0x79, 0x7a, 0x2e, 0x62, 0x6c, 0x6f, 0x63, 0x6b, 0x2e, 0x66, 0x74, 0x6c, 0x2e, 0x6c, 0x61, 0x6e,
 	0x67, 0x75, 0x61, 0x67, 0x65, 0x2e, 0x76, 0x31, 0x2e, 0x42, 0x75, 0x69, 0x6c, 0x64, 0x43, 0x6f,
-	0x6e, 0x74, 0x65, 0x78, 0x74, 0x55, 0x70, 0x64, 0x61, 0x74, 0x65, 0x64, 0x52, 0x65, 0x71, 0x75,
-	0x65, 0x73, 0x74, 0x1a, 0x36, 0x2e, 0x78, 0x79, 0x7a, 0x2e, 0x62, 0x6c, 0x6f, 0x63, 0x6b, 0x2e,
-	0x66, 0x74, 0x6c, 0x2e, 0x6c, 0x61, 0x6e, 0x67, 0x75, 0x61, 0x67, 0x65, 0x2e, 0x76, 0x31, 0x2e,
-	0x42, 0x75, 0x69, 0x6c, 0x64, 0x43, 0x6f, 0x6e, 0x74, 0x65, 0x78, 0x74, 0x55, 0x70, 0x64, 0x61,
-	0x74, 0x65, 0x64, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x12, 0x72, 0x0a, 0x0d, 0x47,
-	0x65, 0x6e, 0x65, 0x72, 0x61, 0x74, 0x65, 0x53, 0x74, 0x75, 0x62, 0x73, 0x12, 0x2f, 0x2e, 0x78,
-	0x79, 0x7a, 0x2e, 0x62, 0x6c, 0x6f, 0x63, 0x6b, 0x2e, 0x66, 0x74, 0x6c, 0x2e, 0x6c, 0x61, 0x6e,
-	0x67, 0x75, 0x61, 0x67, 0x65, 0x2e, 0x76, 0x31, 0x2e, 0x47, 0x65, 0x6e, 0x65, 0x72, 0x61, 0x74,
-	0x65, 0x53, 0x74, 0x75, 0x62, 0x73, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x30, 0x2e,
-	0x78, 0x79, 0x7a, 0x2e, 0x62, 0x6c, 0x6f, 0x63, 0x6b, 0x2e, 0x66, 0x74, 0x6c, 0x2e, 0x6c, 0x61,
-	0x6e, 0x67, 0x75, 0x61, 0x67, 0x65, 0x2e, 0x76, 0x31, 0x2e, 0x47, 0x65, 0x6e, 0x65, 0x72, 0x61,
-	0x74, 0x65, 0x53, 0x74, 0x75, 0x62, 0x73, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x12,
-	0x81, 0x01, 0x0a, 0x12, 0x53, 0x79, 0x6e, 0x63, 0x53, 0x74, 0x75, 0x62, 0x52, 0x65, 0x66, 0x65,
-	0x72, 0x65, 0x6e, 0x63, 0x65, 0x73, 0x12, 0x34, 0x2e, 0x78, 0x79, 0x7a, 0x2e, 0x62, 0x6c, 0x6f,
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+	0x53, 0x74, 0x75, 0x62, 0x73, 0x12, 0x2f, 0x2e, 0x78, 0x79, 0x7a, 0x2e, 0x62, 0x6c, 0x6f, 0x63,
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 	0x63, 0x6b, 0x2e, 0x66, 0x74, 0x6c, 0x2e, 0x6c, 0x61, 0x6e, 0x67, 0x75, 0x61, 0x67, 0x65, 0x2e,
-	0x76, 0x31, 0x2e, 0x53, 0x79, 0x6e, 0x63, 0x53, 0x74, 0x75, 0x62, 0x52, 0x65, 0x66, 0x65, 0x72,
-	0x65, 0x6e, 0x63, 0x65, 0x73, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x35, 0x2e, 0x78,
-	0x79, 0x7a, 0x2e, 0x62, 0x6c, 0x6f, 0x63, 0x6b, 0x2e, 0x66, 0x74, 0x6c, 0x2e, 0x6c, 0x61, 0x6e,
-	0x67, 0x75, 0x61, 0x67, 0x65, 0x2e, 0x76, 0x31, 0x2e, 0x53, 0x79, 0x6e, 0x63, 0x53, 0x74, 0x75,
-	0x62, 0x52, 0x65, 0x66, 0x65, 0x72, 0x65, 0x6e, 0x63, 0x65, 0x73, 0x52, 0x65, 0x73, 0x70, 0x6f,
-	0x6e, 0x73, 0x65, 0x42, 0x4c, 0x50, 0x01, 0x5a, 0x48, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e,
-	0x63, 0x6f, 0x6d, 0x2f, 0x62, 0x6c, 0x6f, 0x63, 0x6b, 0x2f, 0x66, 0x74, 0x6c, 0x2f, 0x62, 0x61,
-	0x63, 0x6b, 0x65, 0x6e, 0x64, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x73, 0x2f, 0x78, 0x79, 0x7a,
-	0x2f, 0x62, 0x6c, 0x6f, 0x63, 0x6b, 0x2f, 0x66, 0x74, 0x6c, 0x2f, 0x6c, 0x61, 0x6e, 0x67, 0x75,
-	0x61, 0x67, 0x65, 0x2f, 0x76, 0x31, 0x3b, 0x6c, 0x61, 0x6e, 0x67, 0x75, 0x61, 0x67, 0x65, 0x70,
-	0x62, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+	0x76, 0x31, 0x2e, 0x47, 0x65, 0x6e, 0x65, 0x72, 0x61, 0x74, 0x65, 0x53, 0x74, 0x75, 0x62, 0x73,
+	0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x12, 0x81, 0x01, 0x0a, 0x12, 0x53, 0x79, 0x6e,
+	0x63, 0x53, 0x74, 0x75, 0x62, 0x52, 0x65, 0x66, 0x65, 0x72, 0x65, 0x6e, 0x63, 0x65, 0x73, 0x12,
+	0x34, 0x2e, 0x78, 0x79, 0x7a, 0x2e, 0x62, 0x6c, 0x6f, 0x63, 0x6b, 0x2e, 0x66, 0x74, 0x6c, 0x2e,
+	0x6c, 0x61, 0x6e, 0x67, 0x75, 0x61, 0x67, 0x65, 0x2e, 0x76, 0x31, 0x2e, 0x53, 0x79, 0x6e, 0x63,
+	0x53, 0x74, 0x75, 0x62, 0x52, 0x65, 0x66, 0x65, 0x72, 0x65, 0x6e, 0x63, 0x65, 0x73, 0x52, 0x65,
+	0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x35, 0x2e, 0x78, 0x79, 0x7a, 0x2e, 0x62, 0x6c, 0x6f, 0x63,
+	0x6b, 0x2e, 0x66, 0x74, 0x6c, 0x2e, 0x6c, 0x61, 0x6e, 0x67, 0x75, 0x61, 0x67, 0x65, 0x2e, 0x76,
+	0x31, 0x2e, 0x53, 0x79, 0x6e, 0x63, 0x53, 0x74, 0x75, 0x62, 0x52, 0x65, 0x66, 0x65, 0x72, 0x65,
+	0x6e, 0x63, 0x65, 0x73, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x42, 0x4c, 0x50, 0x01,
+	0x5a, 0x48, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x62, 0x6c, 0x6f,
+	0x63, 0x6b, 0x2f, 0x66, 0x74, 0x6c, 0x2f, 0x62, 0x61, 0x63, 0x6b, 0x65, 0x6e, 0x64, 0x2f, 0x70,
+	0x72, 0x6f, 0x74, 0x6f, 0x73, 0x2f, 0x78, 0x79, 0x7a, 0x2f, 0x62, 0x6c, 0x6f, 0x63, 0x6b, 0x2f,
+	0x66, 0x74, 0x6c, 0x2f, 0x6c, 0x61, 0x6e, 0x67, 0x75, 0x61, 0x67, 0x65, 0x2f, 0x76, 0x31, 0x3b,
+	0x6c, 0x61, 0x6e, 0x67, 0x75, 0x61, 0x67, 0x65, 0x70, 0x62, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74,
+	0x6f, 0x33,
 }
 
 var (
diff --git a/backend/protos/xyz/block/ftl/language/v1/language.proto b/backend/protos/xyz/block/ftl/language/v1/language.proto
index 62a49bc068..6d4dc932f4 100644
--- a/backend/protos/xyz/block/ftl/language/v1/language.proto
+++ b/backend/protos/xyz/block/ftl/language/v1/language.proto
@@ -237,8 +237,8 @@ message BuildSuccess {
   // Dev mode debug port
   optional int32 debug_port = 8;
 
-  // Dev mode runner info file, this file is used to allow the runner to communicate provisioner info back to the plugin
-  optional string dev_runner_info_file = 9;
+  // Dev mode hot reload endpoint, this is used to allow the runner to communicate info back to the running process
+  optional string dev_hot_reload_endpoint = 9;
 }
 
 // BuildFailure should be sent when a build fails.
diff --git a/backend/provisioner/scaling/localscaling/local_scaling.go b/backend/provisioner/scaling/localscaling/local_scaling.go
index e393d417ad..80de96b63e 100644
--- a/backend/provisioner/scaling/localscaling/local_scaling.go
+++ b/backend/provisioner/scaling/localscaling/local_scaling.go
@@ -100,11 +100,11 @@ func (l *localScaling) TerminatePreviousDeployments(ctx context.Context, module
 }
 
 type devModeRunner struct {
-	uri url.URL
+	uri          string
+	hotReloadURI string
 	// The deployment key of the deployment that is currently running
-	deploymentKey  optional.Option[key.Deployment]
-	debugPort      int
-	runnerInfoFile optional.Option[string]
+	deploymentKey optional.Option[key.Deployment]
+	debugPort     int
 }
 
 func (l *localScaling) Start(ctx context.Context) error {
@@ -122,9 +122,9 @@ func (l *localScaling) Start(ctx context.Context) error {
 // Must be called under lock
 func (l *localScaling) updateDevModeEndpoint(ctx context.Context, devEndpoints dev.LocalEndpoint) {
 	l.devModeEndpoints[devEndpoints.Module] = &devModeRunner{
-		uri:            devEndpoints.Endpoint,
-		debugPort:      devEndpoints.DebugPort,
-		runnerInfoFile: devEndpoints.RunnerInfoFile,
+		uri:          devEndpoints.Endpoint,
+		debugPort:    devEndpoints.DebugPort,
+		hotReloadURI: devEndpoints.HotReloadEndpoint,
 	}
 	if ide, ok := l.ideSupport.Get(); ok {
 		if devEndpoints.DebugPort != 0 {
@@ -255,12 +255,12 @@ func (l *localScaling) startRunner(ctx context.Context, deploymentKey key.Deploy
 	}
 
 	devEndpoint := l.devModeEndpoints[info.module]
-	devURI := optional.None[url.URL]()
-	devRunnerInfoFile := optional.None[string]()
+	devURI := optional.None[string]()
+	devHotReloadURI := optional.None[string]()
 	debugPort := 0
 	if devEndpoint != nil {
 		devURI = optional.Some(devEndpoint.uri)
-		devRunnerInfoFile = devEndpoint.runnerInfoFile
+		devHotReloadURI = optional.Some(devEndpoint.hotReloadURI)
 		if devKey, ok := devEndpoint.deploymentKey.Get(); ok && devKey.Equal(deploymentKey) {
 			// Already running, don't start another
 			return nil
@@ -297,14 +297,14 @@ func (l *localScaling) startRunner(ctx context.Context, deploymentKey key.Deploy
 		return fmt.Errorf("failed to start runner: %w", err)
 	}
 	config := runner.Config{
-		Bind:               bindURL,
-		ControllerEndpoint: controllerEndpoint,
-		LeaseEndpoint:      l.leaseAddress,
-		Key:                key.NewLocalRunnerKey(keySuffix),
-		Deployment:         deploymentKey,
-		DebugPort:          debugPort,
-		DevEndpoint:        devURI,
-		DevRunnerInfoFile:  devRunnerInfoFile,
+		Bind:                 bindURL,
+		ControllerEndpoint:   controllerEndpoint,
+		LeaseEndpoint:        l.leaseAddress,
+		Key:                  key.NewLocalRunnerKey(keySuffix),
+		Deployment:           deploymentKey,
+		DebugPort:            debugPort,
+		DevEndpoint:          devURI,
+		DevHotReloadEndpoint: devHotReloadURI,
 	}
 
 	simpleName := fmt.Sprintf("runner%d", keySuffix)
diff --git a/backend/runner/runner.go b/backend/runner/runner.go
index aabfb775f9..30396ffcf8 100644
--- a/backend/runner/runner.go
+++ b/backend/runner/runner.go
@@ -31,6 +31,8 @@ import (
 	mysql "github.com/block/ftl-mysql-auth-proxy"
 	"github.com/block/ftl/backend/controller/artefacts"
 	ftldeploymentconnect "github.com/block/ftl/backend/protos/xyz/block/ftl/deployment/v1/deploymentpbconnect"
+	hotreloadpb "github.com/block/ftl/backend/protos/xyz/block/ftl/hotreload/v1"
+	"github.com/block/ftl/backend/protos/xyz/block/ftl/hotreload/v1/hotreloadpbconnect"
 	ftlleaseconnect "github.com/block/ftl/backend/protos/xyz/block/ftl/lease/v1/leasepbconnect"
 	"github.com/block/ftl/backend/protos/xyz/block/ftl/pubsub/v1/pubsubpbconnect"
 	"github.com/block/ftl/backend/protos/xyz/block/ftl/query/v1/querypbconnect"
@@ -57,22 +59,22 @@ import (
 )
 
 type Config struct {
-	Config                []string                 `name:"config" short:"C" help:"Paths to FTL project configuration files." env:"FTL_CONFIG" placeholder:"FILE[,FILE,...]" type:"existingfile"`
-	Bind                  *url.URL                 `help:"Endpoint the Runner should bind to and advertise." default:"http://127.0.0.1:8892" env:"FTL_BIND"`
-	Key                   key.Runner               `help:"Runner key (auto)."`
-	ControllerEndpoint    *url.URL                 `name:"ftl-endpoint" help:"Controller endpoint." env:"FTL_ENDPOINT" default:"http://127.0.0.1:8892"`
-	LeaseEndpoint         *url.URL                 `name:"ftl-lease-endpoint" help:"Lease endpoint endpoint." env:"FTL_LEASE_ENDPOINT" default:"http://127.0.0.1:8895"`
-	QueryEndpoint         *url.URL                 `name:"ftl-query-endpoint" help:"Query endpoint." env:"FTL_QUERY_ENDPOINT" default:"http://127.0.0.1:8897"`
-	TimelineEndpoint      *url.URL                 `help:"Timeline endpoint." env:"FTL_TIMELINE_ENDPOINT" default:"http://127.0.0.1:8894"`
-	TemplateDir           string                   `help:"Template directory to copy into each deployment, if any." type:"existingdir"`
-	DeploymentDir         string                   `help:"Directory to store deployments in." default:"${deploymentdir}"`
-	DeploymentKeepHistory int                      `help:"Number of deployments to keep history for." default:"3"`
-	HeartbeatPeriod       time.Duration            `help:"Minimum period between heartbeats." default:"3s"`
-	HeartbeatJitter       time.Duration            `help:"Jitter to add to heartbeat period." default:"2s"`
-	Deployment            key.Deployment           `help:"The deployment this runner is for." env:"FTL_DEPLOYMENT"`
-	DebugPort             int                      `help:"The port to use for debugging." env:"FTL_DEBUG_PORT"`
-	DevEndpoint           optional.Option[url.URL] `help:"An existing endpoint to connect to in development mode" hidden:""`
-	DevRunnerInfoFile     optional.Option[string]  `help:"The path to a file that we write dev endpoint information to." hidden:""`
+	Config                []string                `name:"config" short:"C" help:"Paths to FTL project configuration files." env:"FTL_CONFIG" placeholder:"FILE[,FILE,...]" type:"existingfile"`
+	Bind                  *url.URL                `help:"Endpoint the Runner should bind to and advertise." default:"http://127.0.0.1:8892" env:"FTL_BIND"`
+	Key                   key.Runner              `help:"Runner key (auto)."`
+	ControllerEndpoint    *url.URL                `name:"ftl-endpoint" help:"Controller endpoint." env:"FTL_ENDPOINT" default:"http://127.0.0.1:8892"`
+	LeaseEndpoint         *url.URL                `name:"ftl-lease-endpoint" help:"Lease endpoint endpoint." env:"FTL_LEASE_ENDPOINT" default:"http://127.0.0.1:8895"`
+	QueryEndpoint         *url.URL                `name:"ftl-query-endpoint" help:"Query endpoint." env:"FTL_QUERY_ENDPOINT" default:"http://127.0.0.1:8897"`
+	TimelineEndpoint      *url.URL                `help:"Timeline endpoint." env:"FTL_TIMELINE_ENDPOINT" default:"http://127.0.0.1:8894"`
+	TemplateDir           string                  `help:"Template directory to copy into each deployment, if any." type:"existingdir"`
+	DeploymentDir         string                  `help:"Directory to store deployments in." default:"${deploymentdir}"`
+	DeploymentKeepHistory int                     `help:"Number of deployments to keep history for." default:"3"`
+	HeartbeatPeriod       time.Duration           `help:"Minimum period between heartbeats." default:"3s"`
+	HeartbeatJitter       time.Duration           `help:"Jitter to add to heartbeat period." default:"2s"`
+	Deployment            key.Deployment          `help:"The deployment this runner is for." env:"FTL_DEPLOYMENT"`
+	DebugPort             int                     `help:"The port to use for debugging." env:"FTL_DEBUG_PORT"`
+	DevEndpoint           optional.Option[string] `help:"An existing endpoint to connect to in development mode" hidden:""`
+	DevHotReloadEndpoint  optional.Option[string] `help:"The gRPC enpoint to send runner into to for hot reload." hidden:""`
 }
 
 func Start(ctx context.Context, config Config, storage *artefacts.OCIArtefactService) error {
@@ -119,17 +121,17 @@ func Start(ctx context.Context, config Config, storage *artefacts.OCIArtefactSer
 	timelineClient := timeline.NewClient(ctx, config.TimelineEndpoint)
 
 	svc := &Service{
-		key:                runnerKey,
-		config:             config,
-		storage:            storage,
-		controllerClient:   controllerClient,
-		timelineClient:     timelineClient,
-		labels:             labels,
-		deploymentLogQueue: make(chan log.Entry, 10000),
-		cancelFunc:         doneFunc,
-		devEndpoint:        config.DevEndpoint,
-		devRunnerInfoFile:  config.DevRunnerInfoFile,
-		queryServices:      query.NewMultiService(),
+		key:                  runnerKey,
+		config:               config,
+		storage:              storage,
+		controllerClient:     controllerClient,
+		timelineClient:       timelineClient,
+		labels:               labels,
+		deploymentLogQueue:   make(chan log.Entry, 10000),
+		cancelFunc:           doneFunc,
+		devEndpoint:          config.DevEndpoint,
+		devHotReloadEndpoint: config.DevHotReloadEndpoint,
+		queryServices:        query.NewMultiService(),
 	}
 
 	module, err := svc.getModule(ctx, config.Deployment)
@@ -245,10 +247,11 @@ var _ ftlv1connect.VerbServiceHandler = (*Service)(nil)
 type deployment struct {
 	key key.Deployment
 	// Cancelled when plugin terminates
-	ctx      context.Context
-	cmd      optional.Option[exec.Cmd]
-	endpoint *url.URL // The endpoint the plugin is listening on.
-	client   ftlv1connect.VerbServiceClient
+	ctx          context.Context
+	cmd          optional.Option[exec.Cmd]
+	endpoint     string // The endpoint the plugin is listening on.
+	client       ftlv1connect.VerbServiceClient
+	reverseProxy *httputil.ReverseProxy
 }
 
 type Service struct {
@@ -262,16 +265,16 @@ type Service struct {
 	controllerClient ftlv1connect.ControllerServiceClient
 	timelineClient   *timeline.Client
 	// Failed to register with the Controller
-	registrationFailure atomic.Value[optional.Option[error]]
-	labels              *structpb.Struct
-	deploymentLogQueue  chan log.Entry
-	cancelFunc          func()
-	devEndpoint         optional.Option[url.URL]
-	devRunnerInfoFile   optional.Option[string]
-	proxy               *proxy.Service
-	pubSub              *pubsub.Service
-	queryServices       *query.MultiService
-	proxyBindAddress    *url.URL
+	registrationFailure  atomic.Value[optional.Option[error]]
+	labels               *structpb.Struct
+	deploymentLogQueue   chan log.Entry
+	cancelFunc           func()
+	devEndpoint          optional.Option[string]
+	devHotReloadEndpoint optional.Option[string]
+	proxy                *proxy.Service
+	pubSub               *pubsub.Service
+	queryServices        *query.MultiService
+	proxyBindAddress     *url.URL
 }
 
 func (s *Service) Call(ctx context.Context, req *connect.Request[ftlv1.CallRequest]) (*connect.Response[ftlv1.CallResponse], error) {
@@ -387,27 +390,38 @@ func (s *Service) deploy(ctx context.Context, key key.Deployment, module *schema
 
 	var dep *deployment
 	if ep, ok := s.devEndpoint.Get(); ok {
-		client := rpc.Dial(ftlv1connect.NewVerbServiceClient, ep.String(), log.Error)
-		dep = &deployment{
-			ctx:      ctx,
-			key:      key,
-			cmd:      optional.None[exec.Cmd](),
-			endpoint: &ep,
-			client:   client,
-		}
-		if file, ok := s.devRunnerInfoFile.Get(); ok {
-			fileContents := "proxy.bind.address=" + s.proxyBindAddress.String()
-			fileContents += fmt.Sprintf("\ndeployment=%s", s.config.Deployment.String())
+		if hotRelaodEp, ok := s.devHotReloadEndpoint.Get(); ok {
+			hotReloadClient := rpc.Dial(hotreloadpbconnect.NewHotReloadServiceClient, hotRelaodEp, log.Error)
+			err = rpc.Wait(ctx, backoff.Backoff{}, time.Minute, hotReloadClient)
+			if err != nil {
+				return fmt.Errorf("failed to ping hot reload endpoint: %w", err)
+			}
+			var databases []*hotreloadpb.Database
 			dbAddresses.Range(func(key string, value string) bool {
-				fileContents += fmt.Sprintf("\ndatabase.%s.url=%s", key, value)
+				databases = append(databases, &hotreloadpb.Database{
+					Name:    key,
+					Address: value,
+				})
 				return true
 			})
-			err = os.WriteFile(file, []byte(fileContents), 0660) // #nosec
+			_, err := hotReloadClient.RunnerInfo(ctx, connect.NewRequest(&hotreloadpb.RunnerInfoRequest{
+				Deployment: s.config.Deployment.String(),
+				Address:    s.proxyBindAddress.String(),
+				Databases:  databases,
+			}))
 			if err != nil {
-				logger.Errorf(err, "could not create FTL dev Config")
+				return fmt.Errorf("failed to send runner info: %w", err)
 			}
 		}
+		client := rpc.Dial(ftlv1connect.NewVerbServiceClient, ep, log.Error)
 		err = rpc.Wait(ctx, backoff.Backoff{}, time.Minute, client)
+		dep = &deployment{
+			ctx:      ctx,
+			key:      key,
+			cmd:      optional.None[exec.Cmd](),
+			endpoint: ep,
+			client:   client,
+		}
 		if err != nil {
 			observability.Deployment.Failure(ctx, optional.Some(key.String()))
 			return fmt.Errorf("failed to ping dev endpoint: %w", err)
@@ -510,18 +524,19 @@ func (s *Service) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		http.Error(w, "no deployment", http.StatusNotFound)
 		return
 	}
-	proxy := httputil.NewSingleHostReverseProxy(deployment.endpoint)
-	proxy.ServeHTTP(w, r)
+	deployment.reverseProxy.ServeHTTP(w, r)
 
 }
 
 func (s *Service) makeDeployment(ctx context.Context, key key.Deployment, plugin *plugin.Plugin[ftlv1connect.VerbServiceClient, ftlv1.PingRequest, ftlv1.PingResponse, *ftlv1.PingResponse]) *deployment {
+	proxy := httputil.NewSingleHostReverseProxy(plugin.Endpoint)
 	return &deployment{
-		ctx:      ctx,
-		key:      key,
-		cmd:      optional.Ptr(plugin.Cmd),
-		endpoint: plugin.Endpoint,
-		client:   plugin.Client,
+		ctx:          ctx,
+		key:          key,
+		cmd:          optional.Ptr(plugin.Cmd),
+		endpoint:     plugin.Endpoint.String(),
+		client:       plugin.Client,
+		reverseProxy: proxy,
 	}
 }
 
diff --git a/common/schema/schema.go b/common/schema/schema.go
index 14f2fe3e76..706e4ad360 100644
--- a/common/schema/schema.go
+++ b/common/schema/schema.go
@@ -210,6 +210,9 @@ func TypeName(v any) string {
 
 // FromProto converts a protobuf Schema to a Schema and validates it.
 func FromProto(s *schemapb.Schema) (*Schema, error) {
+	if s == nil {
+		return &Schema{}, nil
+	}
 	modules, err := moduleListToSchema(s.Modules)
 	if err != nil {
 		return nil, err
diff --git a/frontend/console/src/protos/xyz/block/ftl/hotreload/v1/hotreload_connect.ts b/frontend/console/src/protos/xyz/block/ftl/hotreload/v1/hotreload_connect.ts
new file mode 100644
index 0000000000..06f01b7c0e
--- /dev/null
+++ b/frontend/console/src/protos/xyz/block/ftl/hotreload/v1/hotreload_connect.ts
@@ -0,0 +1,67 @@
+// @generated by protoc-gen-connect-es v1.6.1 with parameter "target=ts"
+// @generated from file xyz/block/ftl/hotreload/v1/hotreload.proto (package xyz.block.ftl.hotreload.v1, syntax proto3)
+/* eslint-disable */
+// @ts-nocheck
+
+import { PingRequest, PingResponse } from "../../v1/ftl_pb.js";
+import { MethodIdempotency, MethodKind } from "@bufbuild/protobuf";
+import { ReloadRequest, ReloadResponse, RunnerInfoRequest, RunnerInfoResponse, WatchRequest, WatchResponse } from "./hotreload_pb.js";
+
+/**
+ * HotReloadService is for communication between a language plugin a language runtime that can perform a hot reload
+ *
+ * @generated from service xyz.block.ftl.hotreload.v1.HotReloadService
+ */
+export const HotReloadService = {
+  typeName: "xyz.block.ftl.hotreload.v1.HotReloadService",
+  methods: {
+    /**
+     * Ping service for readiness.
+     *
+     * @generated from rpc xyz.block.ftl.hotreload.v1.HotReloadService.Ping
+     */
+    ping: {
+      name: "Ping",
+      I: PingRequest,
+      O: PingResponse,
+      kind: MethodKind.Unary,
+      idempotency: MethodIdempotency.NoSideEffects,
+    },
+    /**
+     * Forces an explicit Reload from the plugin. This is useful for when the plugin needs to trigger a Reload,
+     * such as when the Reload context changes.
+     *
+     *
+     * @generated from rpc xyz.block.ftl.hotreload.v1.HotReloadService.Reload
+     */
+    reload: {
+      name: "Reload",
+      I: ReloadRequest,
+      O: ReloadResponse,
+      kind: MethodKind.Unary,
+    },
+    /**
+     * Watch for hot reloads not initiated by an explicit Reload call.
+     *
+     * @generated from rpc xyz.block.ftl.hotreload.v1.HotReloadService.Watch
+     */
+    watch: {
+      name: "Watch",
+      I: WatchRequest,
+      O: WatchResponse,
+      kind: MethodKind.ServerStreaming,
+    },
+    /**
+     * Invoked by the runner to provide runner information to the plugin.
+     *
+     * @generated from rpc xyz.block.ftl.hotreload.v1.HotReloadService.RunnerInfo
+     */
+    runnerInfo: {
+      name: "RunnerInfo",
+      I: RunnerInfoRequest,
+      O: RunnerInfoResponse,
+      kind: MethodKind.Unary,
+    },
+  }
+} as const;
+
diff --git a/frontend/console/src/protos/xyz/block/ftl/hotreload/v1/hotreload_pb.ts b/frontend/console/src/protos/xyz/block/ftl/hotreload/v1/hotreload_pb.ts
new file mode 100644
index 0000000000..d3444022d4
--- /dev/null
+++ b/frontend/console/src/protos/xyz/block/ftl/hotreload/v1/hotreload_pb.ts
@@ -0,0 +1,425 @@
+// @generated by protoc-gen-es v1.10.0 with parameter "target=ts"
+// @generated from file xyz/block/ftl/hotreload/v1/hotreload.proto (package xyz.block.ftl.hotreload.v1, syntax proto3)
+/* eslint-disable */
+// @ts-nocheck
+
+import type { BinaryReadOptions, FieldList, JsonReadOptions, JsonValue, PartialMessage, PlainMessage } from "@bufbuild/protobuf";
+import { Message, proto3 } from "@bufbuild/protobuf";
+import { Module } from "../../schema/v1/schema_pb.js";
+import { ErrorList } from "../../language/v1/language_pb.js";
+
+/**
+ * @generated from message xyz.block.ftl.hotreload.v1.ReloadRequest
+ */
+export class ReloadRequest extends Message<ReloadRequest> {
+  /**
+   * @generated from field: bool force = 1;
+   */
+  force = false;
+
+  constructor(data?: PartialMessage<ReloadRequest>) {
+    super();
+    proto3.util.initPartial(data, this);
+  }
+
+  static readonly runtime: typeof proto3 = proto3;
+  static readonly typeName = "xyz.block.ftl.hotreload.v1.ReloadRequest";
+  static readonly fields: FieldList = proto3.util.newFieldList(() => [
+    { no: 1, name: "force", kind: "scalar", T: 8 /* ScalarType.BOOL */ },
+  ]);
+
+  static fromBinary(bytes: Uint8Array, options?: Partial<BinaryReadOptions>): ReloadRequest {
+    return new ReloadRequest().fromBinary(bytes, options);
+  }
+
+  static fromJson(jsonValue: JsonValue, options?: Partial<JsonReadOptions>): ReloadRequest {
+    return new ReloadRequest().fromJson(jsonValue, options);
+  }
+
+  static fromJsonString(jsonString: string, options?: Partial<JsonReadOptions>): ReloadRequest {
+    return new ReloadRequest().fromJsonString(jsonString, options);
+  }
+
+  static equals(a: ReloadRequest | PlainMessage<ReloadRequest> | undefined, b: ReloadRequest | PlainMessage<ReloadRequest> | undefined): boolean {
+    return proto3.util.equals(ReloadRequest, a, b);
+  }
+}
+
+/**
+ * @generated from message xyz.block.ftl.hotreload.v1.ReloadResponse
+ */
+export class ReloadResponse extends Message<ReloadResponse> {
+  /**
+   * @generated from oneof xyz.block.ftl.hotreload.v1.ReloadResponse.event
+   */
+  event: {
+    /**
+     * @generated from field: xyz.block.ftl.hotreload.v1.ReloadNotRequired reload_not_required = 1;
+     */
+    value: ReloadNotRequired;
+    case: "reloadNotRequired";
+  } | {
+    /**
+     * @generated from field: xyz.block.ftl.hotreload.v1.ReloadSuccess reload_success = 2;
+     */
+    value: ReloadSuccess;
+    case: "reloadSuccess";
+  } | {
+    /**
+     * @generated from field: xyz.block.ftl.hotreload.v1.ReloadFailed reload_failed = 3;
+     */
+    value: ReloadFailed;
+    case: "reloadFailed";
+  } | { case: undefined; value?: undefined } = { case: undefined };
+
+  constructor(data?: PartialMessage<ReloadResponse>) {
+    super();
+    proto3.util.initPartial(data, this);
+  }
+
+  static readonly runtime: typeof proto3 = proto3;
+  static readonly typeName = "xyz.block.ftl.hotreload.v1.ReloadResponse";
+  static readonly fields: FieldList = proto3.util.newFieldList(() => [
+    { no: 1, name: "reload_not_required", kind: "message", T: ReloadNotRequired, oneof: "event" },
+    { no: 2, name: "reload_success", kind: "message", T: ReloadSuccess, oneof: "event" },
+    { no: 3, name: "reload_failed", kind: "message", T: ReloadFailed, oneof: "event" },
+  ]);
+
+  static fromBinary(bytes: Uint8Array, options?: Partial<BinaryReadOptions>): ReloadResponse {
+    return new ReloadResponse().fromBinary(bytes, options);
+  }
+
+  static fromJson(jsonValue: JsonValue, options?: Partial<JsonReadOptions>): ReloadResponse {
+    return new ReloadResponse().fromJson(jsonValue, options);
+  }
+
+  static fromJsonString(jsonString: string, options?: Partial<JsonReadOptions>): ReloadResponse {
+    return new ReloadResponse().fromJsonString(jsonString, options);
+  }
+
+  static equals(a: ReloadResponse | PlainMessage<ReloadResponse> | undefined, b: ReloadResponse | PlainMessage<ReloadResponse> | undefined): boolean {
+    return proto3.util.equals(ReloadResponse, a, b);
+  }
+}
+
+/**
+ * @generated from message xyz.block.ftl.hotreload.v1.WatchRequest
+ */
+export class WatchRequest extends Message<WatchRequest> {
+  constructor(data?: PartialMessage<WatchRequest>) {
+    super();
+    proto3.util.initPartial(data, this);
+  }
+
+  static readonly runtime: typeof proto3 = proto3;
+  static readonly typeName = "xyz.block.ftl.hotreload.v1.WatchRequest";
+  static readonly fields: FieldList = proto3.util.newFieldList(() => [
+  ]);
+
+  static fromBinary(bytes: Uint8Array, options?: Partial<BinaryReadOptions>): WatchRequest {
+    return new WatchRequest().fromBinary(bytes, options);
+  }
+
+  static fromJson(jsonValue: JsonValue, options?: Partial<JsonReadOptions>): WatchRequest {
+    return new WatchRequest().fromJson(jsonValue, options);
+  }
+
+  static fromJsonString(jsonString: string, options?: Partial<JsonReadOptions>): WatchRequest {
+    return new WatchRequest().fromJsonString(jsonString, options);
+  }
+
+  static equals(a: WatchRequest | PlainMessage<WatchRequest> | undefined, b: WatchRequest | PlainMessage<WatchRequest> | undefined): boolean {
+    return proto3.util.equals(WatchRequest, a, b);
+  }
+}
+
+/**
+ * @generated from message xyz.block.ftl.hotreload.v1.WatchResponse
+ */
+export class WatchResponse extends Message<WatchResponse> {
+  /**
+   * @generated from oneof xyz.block.ftl.hotreload.v1.WatchResponse.event
+   */
+  event: {
+    /**
+     * @generated from field: xyz.block.ftl.hotreload.v1.ReloadSuccess reload_success = 1;
+     */
+    value: ReloadSuccess;
+    case: "reloadSuccess";
+  } | {
+    /**
+     * @generated from field: xyz.block.ftl.hotreload.v1.ReloadFailed reload_failed = 2;
+     */
+    value: ReloadFailed;
+    case: "reloadFailed";
+  } | { case: undefined; value?: undefined } = { case: undefined };
+
+  constructor(data?: PartialMessage<WatchResponse>) {
+    super();
+    proto3.util.initPartial(data, this);
+  }
+
+  static readonly runtime: typeof proto3 = proto3;
+  static readonly typeName = "xyz.block.ftl.hotreload.v1.WatchResponse";
+  static readonly fields: FieldList = proto3.util.newFieldList(() => [
+    { no: 1, name: "reload_success", kind: "message", T: ReloadSuccess, oneof: "event" },
+    { no: 2, name: "reload_failed", kind: "message", T: ReloadFailed, oneof: "event" },
+  ]);
+
+  static fromBinary(bytes: Uint8Array, options?: Partial<BinaryReadOptions>): WatchResponse {
+    return new WatchResponse().fromBinary(bytes, options);
+  }
+
+  static fromJson(jsonValue: JsonValue, options?: Partial<JsonReadOptions>): WatchResponse {
+    return new WatchResponse().fromJson(jsonValue, options);
+  }
+
+  static fromJsonString(jsonString: string, options?: Partial<JsonReadOptions>): WatchResponse {
+    return new WatchResponse().fromJsonString(jsonString, options);
+  }
+
+  static equals(a: WatchResponse | PlainMessage<WatchResponse> | undefined, b: WatchResponse | PlainMessage<WatchResponse> | undefined): boolean {
+    return proto3.util.equals(WatchResponse, a, b);
+  }
+}
+
+/**
+ * @generated from message xyz.block.ftl.hotreload.v1.RunnerInfoRequest
+ */
+export class RunnerInfoRequest extends Message<RunnerInfoRequest> {
+  /**
+   * @generated from field: string address = 1;
+   */
+  address = "";
+
+  /**
+   * @generated from field: string deployment = 2;
+   */
+  deployment = "";
+
+  /**
+   * @generated from field: repeated xyz.block.ftl.hotreload.v1.Database databases = 3;
+   */
+  databases: Database[] = [];
+
+  constructor(data?: PartialMessage<RunnerInfoRequest>) {
+    super();
+    proto3.util.initPartial(data, this);
+  }
+
+  static readonly runtime: typeof proto3 = proto3;
+  static readonly typeName = "xyz.block.ftl.hotreload.v1.RunnerInfoRequest";
+  static readonly fields: FieldList = proto3.util.newFieldList(() => [
+    { no: 1, name: "address", kind: "scalar", T: 9 /* ScalarType.STRING */ },
+    { no: 2, name: "deployment", kind: "scalar", T: 9 /* ScalarType.STRING */ },
+    { no: 3, name: "databases", kind: "message", T: Database, repeated: true },
+  ]);
+
+  static fromBinary(bytes: Uint8Array, options?: Partial<BinaryReadOptions>): RunnerInfoRequest {
+    return new RunnerInfoRequest().fromBinary(bytes, options);
+  }
+
+  static fromJson(jsonValue: JsonValue, options?: Partial<JsonReadOptions>): RunnerInfoRequest {
+    return new RunnerInfoRequest().fromJson(jsonValue, options);
+  }
+
+  static fromJsonString(jsonString: string, options?: Partial<JsonReadOptions>): RunnerInfoRequest {
+    return new RunnerInfoRequest().fromJsonString(jsonString, options);
+  }
+
+  static equals(a: RunnerInfoRequest | PlainMessage<RunnerInfoRequest> | undefined, b: RunnerInfoRequest | PlainMessage<RunnerInfoRequest> | undefined): boolean {
+    return proto3.util.equals(RunnerInfoRequest, a, b);
+  }
+}
+
+/**
+ * @generated from message xyz.block.ftl.hotreload.v1.Database
+ */
+export class Database extends Message<Database> {
+  /**
+   * @generated from field: string name = 1;
+   */
+  name = "";
+
+  /**
+   * @generated from field: string address = 2;
+   */
+  address = "";
+
+  constructor(data?: PartialMessage<Database>) {
+    super();
+    proto3.util.initPartial(data, this);
+  }
+
+  static readonly runtime: typeof proto3 = proto3;
+  static readonly typeName = "xyz.block.ftl.hotreload.v1.Database";
+  static readonly fields: FieldList = proto3.util.newFieldList(() => [
+    { no: 1, name: "name", kind: "scalar", T: 9 /* ScalarType.STRING */ },
+    { no: 2, name: "address", kind: "scalar", T: 9 /* ScalarType.STRING */ },
+  ]);
+
+  static fromBinary(bytes: Uint8Array, options?: Partial<BinaryReadOptions>): Database {
+    return new Database().fromBinary(bytes, options);
+  }
+
+  static fromJson(jsonValue: JsonValue, options?: Partial<JsonReadOptions>): Database {
+    return new Database().fromJson(jsonValue, options);
+  }
+
+  static fromJsonString(jsonString: string, options?: Partial<JsonReadOptions>): Database {
+    return new Database().fromJsonString(jsonString, options);
+  }
+
+  static equals(a: Database | PlainMessage<Database> | undefined, b: Database | PlainMessage<Database> | undefined): boolean {
+    return proto3.util.equals(Database, a, b);
+  }
+}
+
+/**
+ * @generated from message xyz.block.ftl.hotreload.v1.RunnerInfoResponse
+ */
+export class RunnerInfoResponse extends Message<RunnerInfoResponse> {
+  constructor(data?: PartialMessage<RunnerInfoResponse>) {
+    super();
+    proto3.util.initPartial(data, this);
+  }
+
+  static readonly runtime: typeof proto3 = proto3;
+  static readonly typeName = "xyz.block.ftl.hotreload.v1.RunnerInfoResponse";
+  static readonly fields: FieldList = proto3.util.newFieldList(() => [
+  ]);
+
+  static fromBinary(bytes: Uint8Array, options?: Partial<BinaryReadOptions>): RunnerInfoResponse {
+    return new RunnerInfoResponse().fromBinary(bytes, options);
+  }
+
+  static fromJson(jsonValue: JsonValue, options?: Partial<JsonReadOptions>): RunnerInfoResponse {
+    return new RunnerInfoResponse().fromJson(jsonValue, options);
+  }
+
+  static fromJsonString(jsonString: string, options?: Partial<JsonReadOptions>): RunnerInfoResponse {
+    return new RunnerInfoResponse().fromJsonString(jsonString, options);
+  }
+
+  static equals(a: RunnerInfoResponse | PlainMessage<RunnerInfoResponse> | undefined, b: RunnerInfoResponse | PlainMessage<RunnerInfoResponse> | undefined): boolean {
+    return proto3.util.equals(RunnerInfoResponse, a, b);
+  }
+}
+
+/**
+ * @generated from message xyz.block.ftl.hotreload.v1.ReloadNotRequired
+ */
+export class ReloadNotRequired extends Message<ReloadNotRequired> {
+  constructor(data?: PartialMessage<ReloadNotRequired>) {
+    super();
+    proto3.util.initPartial(data, this);
+  }
+
+  static readonly runtime: typeof proto3 = proto3;
+  static readonly typeName = "xyz.block.ftl.hotreload.v1.ReloadNotRequired";
+  static readonly fields: FieldList = proto3.util.newFieldList(() => [
+  ]);
+
+  static fromBinary(bytes: Uint8Array, options?: Partial<BinaryReadOptions>): ReloadNotRequired {
+    return new ReloadNotRequired().fromBinary(bytes, options);
+  }
+
+  static fromJson(jsonValue: JsonValue, options?: Partial<JsonReadOptions>): ReloadNotRequired {
+    return new ReloadNotRequired().fromJson(jsonValue, options);
+  }
+
+  static fromJsonString(jsonString: string, options?: Partial<JsonReadOptions>): ReloadNotRequired {
+    return new ReloadNotRequired().fromJsonString(jsonString, options);
+  }
+
+  static equals(a: ReloadNotRequired | PlainMessage<ReloadNotRequired> | undefined, b: ReloadNotRequired | PlainMessage<ReloadNotRequired> | undefined): boolean {
+    return proto3.util.equals(ReloadNotRequired, a, b);
+  }
+}
+
+/**
+ * @generated from message xyz.block.ftl.hotreload.v1.ReloadSuccess
+ */
+export class ReloadSuccess extends Message<ReloadSuccess> {
+  /**
+   * Module schema for the built module
+   *
+   * @generated from field: xyz.block.ftl.schema.v1.Module module = 1;
+   */
+  module?: Module;
+
+  /**
+   * Module schema for the built module
+   *
+   * @generated from field: xyz.block.ftl.language.v1.ErrorList errors = 2;
+   */
+  errors?: ErrorList;
+
+  constructor(data?: PartialMessage<ReloadSuccess>) {
+    super();
+    proto3.util.initPartial(data, this);
+  }
+
+  static readonly runtime: typeof proto3 = proto3;
+  static readonly typeName = "xyz.block.ftl.hotreload.v1.ReloadSuccess";
+  static readonly fields: FieldList = proto3.util.newFieldList(() => [
+    { no: 1, name: "module", kind: "message", T: Module },
+    { no: 2, name: "errors", kind: "message", T: ErrorList },
+  ]);
+
+  static fromBinary(bytes: Uint8Array, options?: Partial<BinaryReadOptions>): ReloadSuccess {
+    return new ReloadSuccess().fromBinary(bytes, options);
+  }
+
+  static fromJson(jsonValue: JsonValue, options?: Partial<JsonReadOptions>): ReloadSuccess {
+    return new ReloadSuccess().fromJson(jsonValue, options);
+  }
+
+  static fromJsonString(jsonString: string, options?: Partial<JsonReadOptions>): ReloadSuccess {
+    return new ReloadSuccess().fromJsonString(jsonString, options);
+  }
+
+  static equals(a: ReloadSuccess | PlainMessage<ReloadSuccess> | undefined, b: ReloadSuccess | PlainMessage<ReloadSuccess> | undefined): boolean {
+    return proto3.util.equals(ReloadSuccess, a, b);
+  }
+}
+
+/**
+ * @generated from message xyz.block.ftl.hotreload.v1.ReloadFailed
+ */
+export class ReloadFailed extends Message<ReloadFailed> {
+  /**
+   * Module schema for the built module
+   *
+   * @generated from field: xyz.block.ftl.language.v1.ErrorList errors = 1;
+   */
+  errors?: ErrorList;
+
+  constructor(data?: PartialMessage<ReloadFailed>) {
+    super();
+    proto3.util.initPartial(data, this);
+  }
+
+  static readonly runtime: typeof proto3 = proto3;
+  static readonly typeName = "xyz.block.ftl.hotreload.v1.ReloadFailed";
+  static readonly fields: FieldList = proto3.util.newFieldList(() => [
+    { no: 1, name: "errors", kind: "message", T: ErrorList },
+  ]);
+
+  static fromBinary(bytes: Uint8Array, options?: Partial<BinaryReadOptions>): ReloadFailed {
+    return new ReloadFailed().fromBinary(bytes, options);
+  }
+
+  static fromJson(jsonValue: JsonValue, options?: Partial<JsonReadOptions>): ReloadFailed {
+    return new ReloadFailed().fromJson(jsonValue, options);
+  }
+
+  static fromJsonString(jsonString: string, options?: Partial<JsonReadOptions>): ReloadFailed {
+    return new ReloadFailed().fromJsonString(jsonString, options);
+  }
+
+  static equals(a: ReloadFailed | PlainMessage<ReloadFailed> | undefined, b: ReloadFailed | PlainMessage<ReloadFailed> | undefined): boolean {
+    return proto3.util.equals(ReloadFailed, a, b);
+  }
+}
+
diff --git a/frontend/console/src/protos/xyz/block/ftl/language/v1/language_pb.ts b/frontend/console/src/protos/xyz/block/ftl/language/v1/language_pb.ts
index 66d2df2701..d9ee407631 100644
--- a/frontend/console/src/protos/xyz/block/ftl/language/v1/language_pb.ts
+++ b/frontend/console/src/protos/xyz/block/ftl/language/v1/language_pb.ts
@@ -1170,11 +1170,11 @@ export class BuildSuccess extends Message<BuildSuccess> {
   debugPort?: number;
 
   /**
-   * Dev mode runner info file, this file is used to allow the runner to communicate provisioner info back to the plugin
+   * Dev mode hot reload endpoint, this is used to allow the runner to communicate info back to the running process
    *
-   * @generated from field: optional string dev_runner_info_file = 9;
+   * @generated from field: optional string dev_hot_reload_endpoint = 9;
    */
-  devRunnerInfoFile?: string;
+  devHotReloadEndpoint?: string;
 
   constructor(data?: PartialMessage<BuildSuccess>) {
     super();
@@ -1192,7 +1192,7 @@ export class BuildSuccess extends Message<BuildSuccess> {
     { no: 6, name: "errors", kind: "message", T: ErrorList },
     { no: 7, name: "dev_endpoint", kind: "scalar", T: 9 /* ScalarType.STRING */, opt: true },
     { no: 8, name: "debug_port", kind: "scalar", T: 5 /* ScalarType.INT32 */, opt: true },
-    { no: 9, name: "dev_runner_info_file", kind: "scalar", T: 9 /* ScalarType.STRING */, opt: true },
+    { no: 9, name: "dev_hot_reload_endpoint", kind: "scalar", T: 9 /* ScalarType.STRING */, opt: true },
   ]);
 
   static fromBinary(bytes: Uint8Array, options?: Partial<BinaryReadOptions>): BuildSuccess {
diff --git a/internal/buildengine/build.go b/internal/buildengine/build.go
index e050a82e26..47ebf44711 100644
--- a/internal/buildengine/build.go
+++ b/internal/buildengine/build.go
@@ -3,7 +3,6 @@ package buildengine
 import (
 	"context"
 	"fmt"
-	"net/url"
 	"os"
 	"path/filepath"
 	"time"
@@ -93,10 +92,7 @@ func handleBuildResult(ctx context.Context, projectConfig projectconfig.Config,
 	}
 	if endpoint, ok := result.DevEndpoint.Get(); ok {
 		if devModeEndpoints != nil {
-			parsed, err := url.Parse(endpoint)
-			if err == nil {
-				devModeEndpoints <- dev.LocalEndpoint{Module: config.Module, Endpoint: *parsed, DebugPort: result.DebugPort, Language: config.Language, RunnerInfoFile: result.DevRunnerInfoFile}
-			}
+			devModeEndpoints <- dev.LocalEndpoint{Module: config.Module, Endpoint: endpoint, DebugPort: result.DebugPort, Language: config.Language, HotReloadEndpoint: result.HotReloadEndpoint.Default("")}
 		}
 	}
 	return result.Schema, result.Deploy, nil
diff --git a/internal/buildengine/languageplugin/plugin.go b/internal/buildengine/languageplugin/plugin.go
index 25801244fe..748ed0a172 100644
--- a/internal/buildengine/languageplugin/plugin.go
+++ b/internal/buildengine/languageplugin/plugin.go
@@ -41,7 +41,7 @@ type BuildResult struct {
 	DevEndpoint optional.Option[string]
 
 	// File that the runner can use to pass info into the hot reload endpoint
-	DevRunnerInfoFile optional.Option[string]
+	HotReloadEndpoint optional.Option[string]
 
 	DebugPort int
 }
@@ -581,7 +581,7 @@ func buildResultFromProto(result either.Either[*langpb.BuildResponse_BuildSucces
 			Deploy:            buildSuccess.Deploy,
 			StartTime:         startTime,
 			DevEndpoint:       optional.Ptr(buildSuccess.DevEndpoint),
-			DevRunnerInfoFile: optional.Ptr(buildSuccess.DevRunnerInfoFile),
+			HotReloadEndpoint: optional.Ptr(buildSuccess.DevHotReloadEndpoint),
 			DebugPort:         port,
 		}, nil
 	case either.Right[*langpb.BuildResponse_BuildSuccess, *langpb.BuildResponse_BuildFailure]:
diff --git a/internal/buildengine/languageplugin/plugin_integration_test.go b/internal/buildengine/languageplugin/plugin_integration_test.go
index 413241bd5e..0a13b95154 100644
--- a/internal/buildengine/languageplugin/plugin_integration_test.go
+++ b/internal/buildengine/languageplugin/plugin_integration_test.go
@@ -92,7 +92,7 @@ func TestBuilds(t *testing.T) {
 
 		// Update verb name and expect auto rebuild started and ended
 		modifyVerbName(MODULE_NAME, VERB_NAME_SNIPPET, "aaabbbccc"),
-		waitForAutoRebuildToStart("build-and-watch"),
+		in.IfLanguages(waitForAutoRebuildToStart("build-and-watch"), "go"),
 		waitForBuildToEnd(SUCCESS, "build-and-watch", true, func(t testing.TB, ic in.TestContext, event *langpb.BuildResponse) {
 			successEvent, ok := event.Event.(*langpb.BuildResponse_BuildSuccess)
 			assert.True(t, ok)
@@ -109,7 +109,7 @@ func TestBuilds(t *testing.T) {
 		// Trigger an auto rebuild, but when we are told of the build being started, send a build context update
 		// to force a new build
 		modifyVerbName(MODULE_NAME, "aaabbbccc", "aaaabbbbcccc"),
-		waitForAutoRebuildToStart("build-and-watch"),
+		in.IfLanguages(waitForAutoRebuildToStart("build-and-watch"), "go"),
 		sendUpdatedBuildContext("explicit-build", []string{}, sch),
 		waitForBuildToEnd(SUCCESSORFAILURE, "build-and-watch", true, nil),
 		waitForBuildToEnd(SUCCESS, "explicit-build", false, nil),
diff --git a/internal/dev/devendpoint.go b/internal/dev/devendpoint.go
index ec7f7c2877..6d3906af3b 100644
--- a/internal/dev/devendpoint.go
+++ b/internal/dev/devendpoint.go
@@ -1,15 +1,9 @@
 package dev
 
-import (
-	"net/url"
-
-	"github.com/alecthomas/types/optional"
-)
-
 type LocalEndpoint struct {
-	Module         string
-	Endpoint       url.URL
-	DebugPort      int
-	Language       string
-	RunnerInfoFile optional.Option[string]
+	Module            string
+	Endpoint          string
+	DebugPort         int
+	Language          string
+	HotReloadEndpoint string
 }
diff --git a/internal/integration/harness.go b/internal/integration/harness.go
index 327f9c89d0..c2497e10af 100644
--- a/internal/integration/harness.go
+++ b/internal/integration/harness.go
@@ -48,7 +48,7 @@ const dumpPath = "/tmp/ftl-kube-report"
 var RedPandaBrokers = []string{"127.0.0.1:19092"}
 
 func (i TestContext) integrationTestTimeout() time.Duration {
-	timeout := optional.Zero(os.Getenv("FTL_INTEGRATION_TEST_TIMEOUT")).Default("5s")
+	timeout := optional.Zero(os.Getenv("FTL_INTEGRATION_TEST_TIMEOUT")).Default("25s")
 	d, err := time.ParseDuration(timeout)
 	if err != nil {
 		panic(err)
diff --git a/jvm-runtime/ftl-runtime/common/deployment/src/main/java/xyz/block/ftl/deployment/HotReloadHandler.java b/jvm-runtime/ftl-runtime/common/deployment/src/main/java/xyz/block/ftl/deployment/HotReloadHandler.java
new file mode 100644
index 0000000000..3be83f4f72
--- /dev/null
+++ b/jvm-runtime/ftl-runtime/common/deployment/src/main/java/xyz/block/ftl/deployment/HotReloadHandler.java
@@ -0,0 +1,275 @@
+package xyz.block.ftl.deployment;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import org.jboss.logging.Logger;
+
+import io.grpc.Server;
+import io.grpc.ServerBuilder;
+import io.grpc.stub.StreamObserver;
+import io.quarkus.bootstrap.classloading.QuarkusClassLoader;
+import io.quarkus.deployment.dev.RuntimeUpdatesProcessor;
+import xyz.block.ftl.hotreload.RunnerInfo;
+import xyz.block.ftl.hotreload.RunnerNotification;
+import xyz.block.ftl.hotreload.v1.HotReloadServiceGrpc;
+import xyz.block.ftl.hotreload.v1.ReloadFailed;
+import xyz.block.ftl.hotreload.v1.ReloadNotRequired;
+import xyz.block.ftl.hotreload.v1.ReloadRequest;
+import xyz.block.ftl.hotreload.v1.ReloadResponse;
+import xyz.block.ftl.hotreload.v1.ReloadSuccess;
+import xyz.block.ftl.hotreload.v1.RunnerInfoRequest;
+import xyz.block.ftl.hotreload.v1.RunnerInfoResponse;
+import xyz.block.ftl.hotreload.v1.WatchRequest;
+import xyz.block.ftl.hotreload.v1.WatchResponse;
+import xyz.block.ftl.language.v1.Error;
+import xyz.block.ftl.language.v1.ErrorList;
+import xyz.block.ftl.schema.v1.Module;
+import xyz.block.ftl.v1.PingRequest;
+import xyz.block.ftl.v1.PingResponse;
+
+public class HotReloadHandler extends HotReloadServiceGrpc.HotReloadServiceImplBase {
+
+    private static final Logger LOG = Logger.getLogger(HotReloadHandler.class);
+
+    static final Set<Path> existingMigrations = Collections.newSetFromMap(new ConcurrentHashMap<>());
+
+    private static volatile HotReloadHandler INSTANCE;
+
+    private volatile Module module;
+    private volatile ErrorList errors;
+    private volatile Server server;
+    private boolean explicitlyReloading = false;
+    private boolean sentResults = false;
+    private final List<StreamObserver<WatchResponse>> watches = Collections.synchronizedList(new ArrayList<>());
+
+    public static HotReloadHandler getInstance() {
+        start();
+        return INSTANCE;
+    }
+
+    synchronized void setResults(Module module, ErrorList errors) {
+        this.module = module;
+        this.errors = errors;
+        if (!explicitlyReloading) {
+            List<StreamObserver<WatchResponse>> watches;
+            synchronized (this.watches) {
+                watches = new ArrayList<>(this.watches);
+            }
+            for (var watch : watches) {
+                try {
+                    if (errors == null || errors.getErrorsCount() == 0) {
+                        watch.onNext(WatchResponse.newBuilder()
+                                .setReloadSuccess(ReloadSuccess.newBuilder().setModule(module).build()).build());
+                    } else {
+                        watch.onNext(WatchResponse.newBuilder()
+                                .setReloadFailed(ReloadFailed.newBuilder().setErrors(errors).build()).build());
+                    }
+                } catch (Exception e) {
+                    LOG.debugf("Failed to send watch response %s", e.toString());
+                    this.watches.remove(watch);
+                }
+            }
+        }
+        sentResults = false;
+        explicitlyReloading = false;
+        notifyAll();
+    }
+
+    @Override
+    public void ping(PingRequest request, StreamObserver<PingResponse> responseObserver) {
+        responseObserver.onNext(PingResponse.newBuilder().build());
+        responseObserver.onCompleted();
+    }
+
+    @Override
+    public void reload(ReloadRequest request, StreamObserver<ReloadResponse> responseObserver) {
+
+        // This is complex, as the restart can't happen until the runner is up
+        // We want to report on the results of the schema generations, so we can bring up a runner
+        // Run the restart in a new thread, so we can report on the schema once it is ready
+        var currentModule = module;
+        synchronized (HotReloadHandler.this) {
+            if (explicitlyReloading) {
+                responseObserver.onNext(ReloadResponse.newBuilder()
+                        .setReloadNotRequired(ReloadNotRequired.newBuilder().build())
+                        .build());
+                return;
+            }
+            // If we have new results we don't want to re-scan, we want to send them back
+            if (!sentResults) {
+                explicitlyReloading = true;
+                Thread t = new Thread(() -> {
+                    try {
+                        doScan(request.getForce());
+                    } finally {
+                        synchronized (HotReloadHandler.this) {
+                            explicitlyReloading = false;
+                            HotReloadHandler.this.notifyAll();
+                        }
+                    }
+                }, "FTL Restart Thread");
+                t.start();
+                while (explicitlyReloading) {
+                    try {
+                        HotReloadHandler.this.wait();
+                    } catch (InterruptedException e) {
+                        Thread.currentThread().interrupt();
+                    }
+                }
+            }
+            sentResults = true;
+            Throwable compileProblem = RuntimeUpdatesProcessor.INSTANCE.getCompileProblem();
+            Throwable deploymentProblems = RuntimeUpdatesProcessor.INSTANCE.getDeploymentProblem();
+            if (compileProblem != null || deploymentProblems != null) {
+                ErrorList.Builder builder = ErrorList.newBuilder();
+                if (compileProblem != null) {
+                    builder.addErrors(xyz.block.ftl.language.v1.Error.newBuilder()
+                            .setLevel(xyz.block.ftl.language.v1.Error.ErrorLevel.ERROR_LEVEL_ERROR)
+                            .setType(xyz.block.ftl.language.v1.Error.ErrorType.ERROR_TYPE_COMPILER)
+                            .setMsg(compileProblem.getMessage())
+                            .build());
+                }
+                if (deploymentProblems != null) {
+                    builder.addErrors(xyz.block.ftl.language.v1.Error.newBuilder()
+                            .setLevel(xyz.block.ftl.language.v1.Error.ErrorLevel.ERROR_LEVEL_ERROR)
+                            .setType(Error.ErrorType.ERROR_TYPE_FTL)
+                            .setMsg(deploymentProblems.getMessage())
+                            .build());
+                }
+                responseObserver.onNext(ReloadResponse.newBuilder()
+                        .setReloadFailed(ReloadFailed.newBuilder()
+                                .setErrors(builder).build())
+                        .build());
+                responseObserver.onCompleted();
+            } else if (errors != null && errors.getErrorsCount() > 0) {
+                responseObserver.onNext(ReloadResponse.newBuilder()
+                        .setReloadFailed(ReloadFailed.newBuilder()
+                                .setErrors(errors).build())
+                        .build());
+                responseObserver.onCompleted();
+            } else if (module != null) {
+                if (module == currentModule) {
+                    responseObserver.onNext(ReloadResponse.newBuilder()
+                            .setReloadNotRequired(ReloadNotRequired.newBuilder().build())
+                            .build());
+                } else {
+                    responseObserver.onNext(ReloadResponse.newBuilder()
+                            .setReloadSuccess(ReloadSuccess.newBuilder()
+                                    .setModule(module).build())
+                            .build());
+                }
+                responseObserver.onCompleted();
+            } else {
+                responseObserver.onError(new RuntimeException("schema not generated"));
+            }
+        }
+    }
+
+    @Override
+    public void watch(WatchRequest request, StreamObserver<WatchResponse> responseObserver) {
+        if (module != null || errors != null) {
+            if (errors == null || errors.getErrorsCount() == 0) {
+                responseObserver.onNext(WatchResponse.newBuilder()
+                        .setReloadSuccess(ReloadSuccess.newBuilder().setModule(module).build()).build());
+            } else {
+                responseObserver.onNext(WatchResponse.newBuilder()
+                        .setReloadFailed(ReloadFailed.newBuilder().setErrors(errors).build()).build());
+            }
+        }
+        watches.add(responseObserver);
+    }
+
+    @Override
+    public void runnerInfo(RunnerInfoRequest request, StreamObserver<RunnerInfoResponse> responseObserver) {
+        Map<String, String> databases = new HashMap<>();
+        for (var db : request.getDatabasesList()) {
+            databases.put(db.getName(), db.getAddress());
+        }
+        RunnerNotification
+                .setRunnerInfo(new RunnerInfo(request.getAddress(), request.getDeployment(), databases));
+        responseObserver.onNext(RunnerInfoResponse.newBuilder().build());
+        responseObserver.onCompleted();
+    }
+
+    public static void start() {
+        if (INSTANCE != null) {
+            return;
+        }
+        synchronized (HotReloadHandler.class) {
+            if (INSTANCE == null) {
+                var hr = new HotReloadHandler();
+                hr.init();
+                INSTANCE = hr;
+            }
+        }
+    }
+
+    private void init() {
+        gatherMigrations();
+        int port = Integer.getInteger("ftl.language.port");
+        server = ServerBuilder.forPort(port)
+                .addService(this)
+                .build();
+        try {
+            LOG.info("Starting Hot Reload gRPC server on port " + port);
+            server.start();
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+
+        ((QuarkusClassLoader) HotReloadHandler.class.getClassLoader()).addCloseTask(new Runnable() {
+            @Override
+            public void run() {
+                server.shutdownNow();
+            }
+        });
+    }
+
+    private static void gatherMigrations() {
+        for (var dir : RuntimeUpdatesProcessor.INSTANCE.getSourcesDir()) {
+            Path migrations = dir.resolve("db");
+            if (Files.isDirectory(migrations)) {
+                try (var stream = Files.walk(migrations)) {
+                    stream.forEach(existingMigrations::add);
+                } catch (IOException e) {
+                    throw new RuntimeException(e);
+                }
+            }
+        }
+    }
+
+    void doScan(boolean force) {
+        if (RuntimeUpdatesProcessor.INSTANCE != null) {
+            try {
+                AtomicBoolean newForce = new AtomicBoolean();
+                for (var dir : RuntimeUpdatesProcessor.INSTANCE.getSourcesDir()) {
+                    Path migrations = dir.resolve("db");
+                    if (Files.isDirectory(migrations)) {
+                        try (var stream = Files.walk(migrations)) {
+                            stream.forEach(p -> {
+                                if (p.getFileName().toString().endsWith(".sql")) {
+                                    if (existingMigrations.add(p)) {
+                                        newForce.set(true);
+                                    }
+                                }
+                            });
+                        }
+                    }
+                }
+                RuntimeUpdatesProcessor.INSTANCE.doScan(force || newForce.get());
+            } catch (Exception e) {
+                Logger.getLogger(HotReloadHandler.class).error("Failed to scan for changes", e);
+            }
+        }
+    }
+}
diff --git a/jvm-runtime/ftl-runtime/common/deployment/src/main/java/xyz/block/ftl/deployment/ModuleBuilder.java b/jvm-runtime/ftl-runtime/common/deployment/src/main/java/xyz/block/ftl/deployment/ModuleBuilder.java
index 28d60b9028..77941bee9e 100644
--- a/jvm-runtime/ftl-runtime/common/deployment/src/main/java/xyz/block/ftl/deployment/ModuleBuilder.java
+++ b/jvm-runtime/ftl-runtime/common/deployment/src/main/java/xyz/block/ftl/deployment/ModuleBuilder.java
@@ -17,6 +17,7 @@
 import java.util.Map;
 import java.util.Optional;
 import java.util.Set;
+import java.util.function.BiConsumer;
 import java.util.function.Consumer;
 import java.util.regex.Pattern;
 
@@ -537,7 +538,7 @@ public int getDeclsCount() {
         return decls.size();
     }
 
-    public void writeTo(OutputStream out, OutputStream errorOut) throws IOException {
+    public void writeTo(OutputStream out, OutputStream errorOut, BiConsumer<Module, ErrorList> consumer) throws IOException {
         decls.values().stream().forEachOrdered(protoModuleBuilder::addDecls);
         ErrorList.Builder builder = ErrorList.newBuilder();
         if (!validationFailures.isEmpty()) {
@@ -552,8 +553,13 @@ public void writeTo(OutputStream out, OutputStream errorOut) throws IOException
                     .build()));
             errors.forEach(log::error);
         }
-        builder.build().writeTo(errorOut);
-        protoModuleBuilder.build().writeTo(out);
+        ErrorList errorList = builder.build();
+        errorList.writeTo(errorOut);
+        Module module = protoModuleBuilder.build();
+        module.writeTo(out);
+        if (consumer != null) {
+            consumer.accept(module, errorList);
+        }
     }
 
     public void registerTypeAlias(String name, org.jboss.jandex.Type finalT, org.jboss.jandex.Type finalS, boolean exported,
diff --git a/jvm-runtime/ftl-runtime/common/deployment/src/main/java/xyz/block/ftl/deployment/ModuleProcessor.java b/jvm-runtime/ftl-runtime/common/deployment/src/main/java/xyz/block/ftl/deployment/ModuleProcessor.java
index b64a4f3354..3fc8c51620 100644
--- a/jvm-runtime/ftl-runtime/common/deployment/src/main/java/xyz/block/ftl/deployment/ModuleProcessor.java
+++ b/jvm-runtime/ftl-runtime/common/deployment/src/main/java/xyz/block/ftl/deployment/ModuleProcessor.java
@@ -2,7 +2,6 @@
 
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
-import java.io.OutputStream;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Path;
@@ -15,8 +14,8 @@
 import java.util.List;
 import java.util.Map;
 import java.util.Objects;
-import java.util.Timer;
-import java.util.TimerTask;
+import java.util.concurrent.atomic.AtomicReference;
+import java.util.function.BiConsumer;
 import java.util.stream.Collectors;
 
 import org.jboss.jandex.DotName;
@@ -25,8 +24,6 @@
 import org.tomlj.TomlParseResult;
 
 import io.quarkus.arc.deployment.AdditionalBeanBuildItem;
-import io.quarkus.bootstrap.classloading.QuarkusClassLoader;
-import io.quarkus.deployment.IsDevelopment;
 import io.quarkus.deployment.annotations.BuildProducer;
 import io.quarkus.deployment.annotations.BuildStep;
 import io.quarkus.deployment.annotations.ExecutionTime;
@@ -41,14 +38,13 @@
 import io.quarkus.deployment.builditem.ServiceStartBuildItem;
 import io.quarkus.deployment.builditem.ShutdownContextBuildItem;
 import io.quarkus.deployment.builditem.SystemPropertyBuildItem;
-import io.quarkus.deployment.dev.RuntimeUpdatesProcessor;
 import io.quarkus.deployment.pkg.builditem.OutputTargetBuildItem;
 import io.quarkus.grpc.deployment.BindableServiceBuildItem;
 import io.quarkus.runtime.LaunchMode;
 import io.quarkus.runtime.util.HashUtil;
 import io.quarkus.vertx.http.deployment.RequireSocketHttpBuildItem;
 import io.quarkus.vertx.http.deployment.RequireVirtualHttpBuildItem;
-import xyz.block.ftl.language.v1.Error;
+import xyz.block.ftl.hotreload.RunnerNotification;
 import xyz.block.ftl.language.v1.ErrorList;
 import xyz.block.ftl.runtime.FTLDatasourceCredentials;
 import xyz.block.ftl.runtime.FTLRecorder;
@@ -68,8 +64,6 @@ public class ModuleProcessor {
 
     private static final String SCHEMA_OUT = "schema.pb";
     private static final String ERRORS_OUT = "errors.pb";
-    public static final String DEV_MODE_RUNNER_INFO_FILE = "FTL_RUNNER_INFO";
-
     /**
      * Persistent schema hash, used to detect runner restarts in dev mode.
      */
@@ -91,76 +85,6 @@ public SystemPropertyBuildItem moduleNameConfig(ApplicationInfoBuildItem applica
         return new SystemPropertyBuildItem("ftl.module.name", applicationInfoBuildItem.getName());
     }
 
-    private static volatile Timer devModeProblemTimer;
-
-    @BuildStep(onlyIf = IsDevelopment.class)
-    @Record(ExecutionTime.STATIC_INIT)
-    public void reportDevModeProblems(FTLRecorder recorder, OutputTargetBuildItem outputTargetBuildItem) {
-        if (devModeProblemTimer != null) {
-            return;
-        }
-        Path errorOutput = outputTargetBuildItem.getOutputDirectory().resolve(ERRORS_OUT);
-        devModeProblemTimer = new Timer("FTL Dev Mode Error Report", true);
-        devModeProblemTimer.schedule(new TimerTask() {
-
-            String errorHash;
-
-            @Override
-            public void run() {
-                Throwable compileProblem = RuntimeUpdatesProcessor.INSTANCE.getCompileProblem();
-                Throwable deploymentProblems = RuntimeUpdatesProcessor.INSTANCE.getDeploymentProblem();
-                if (compileProblem != null || deploymentProblems != null) {
-                    ErrorList.Builder builder = ErrorList.newBuilder();
-                    if (compileProblem != null) {
-                        builder.addErrors(Error.newBuilder()
-                                .setLevel(Error.ErrorLevel.ERROR_LEVEL_ERROR)
-                                .setType(Error.ErrorType.ERROR_TYPE_COMPILER)
-                                .setMsg(compileProblem.getMessage())
-                                .build());
-                    }
-                    if (deploymentProblems != null) {
-                        builder.addErrors(Error.newBuilder()
-                                .setLevel(Error.ErrorLevel.ERROR_LEVEL_ERROR)
-                                .setType(Error.ErrorType.ERROR_TYPE_FTL)
-                                .setMsg(deploymentProblems.getMessage())
-                                .build());
-                    }
-                    ByteArrayOutputStream baos = new ByteArrayOutputStream();
-                    try (var out = Files.newOutputStream(errorOutput)) {
-                        builder.build().writeTo(baos);
-                        errorHash = HashUtil.sha256(baos.toByteArray());
-                        builder.build().writeTo(out);
-                    } catch (IOException e) {
-                        log.error("Failed to write error list", e);
-                    }
-                } else if (errorHash != null) {
-                    if (!Files.exists(errorOutput)) {
-                        // File already cleared
-                        errorHash = null;
-                    } else {
-                        try {
-                            var currentHash = HashUtil.sha256(Files.readAllBytes(errorOutput));
-                            if (currentHash.equals(errorHash)) {
-                                try (OutputStream output = Files.newOutputStream(errorOutput)) {
-                                    ErrorList.newBuilder().build().writeTo(output);
-                                }
-                            }
-                        } catch (IOException e) {
-                            log.errorf("Failed to read error list", e);
-                        }
-                    }
-                }
-            }
-        }, 1000, 1000);
-        ((QuarkusClassLoader) ModuleProcessor.class.getClassLoader()).addCloseTask(new Runnable() {
-            @Override
-            public void run() {
-                devModeProblemTimer.cancel();
-                devModeProblemTimer = null;
-            }
-        });
-    }
-
     @BuildStep
     ModuleNameBuildItem moduleName(ApplicationInfoBuildItem applicationInfoBuildItem,
             ApplicationArchivesBuildItem archivesBuildItem) throws IOException {
@@ -246,51 +170,50 @@ public void generateSchema(CombinedIndexBuildItem index,
         Path errorOutput = outputTargetBuildItem.getOutputDirectory().resolve(ERRORS_OUT);
         ByteArrayOutputStream sch = new ByteArrayOutputStream();
         ByteArrayOutputStream err = new ByteArrayOutputStream();
-        moduleBuilder.writeTo(sch, err);
+        AtomicReference<ErrorList> errRef = new AtomicReference<>();
+        AtomicReference<xyz.block.ftl.schema.v1.Module> schRef = new AtomicReference<>();
+        moduleBuilder.writeTo(sch, err, new BiConsumer<xyz.block.ftl.schema.v1.Module, ErrorList>() {
+            @Override
+            public void accept(xyz.block.ftl.schema.v1.Module module, ErrorList errorList) {
+                errRef.set(errorList);
+                schRef.set(module);
+            }
+        });
 
         var schBytes = sch.toByteArray();
         var errBytes = err.toByteArray();
+        recorder.loadModuleContextOnStartup();
+
+        Files.write(output, schBytes);
+        Files.write(errorOutput, errBytes);
 
         if (launchModeBuildItem.getLaunchMode() == LaunchMode.DEVELOPMENT) {
+            HotReloadHandler.getInstance().setResults(schRef.get(), errRef.get());
             // Handle runner restarts in development mode. If this is the first launch, or the schema has changed, we need to
             // get updated runner information, although we don't actually get this until the runner has started.
             var hash = HashUtil.sha256(schBytes);
-            if (Objects.equals(hash, schemaHash)) {
-                return;
+            if (!Objects.equals(hash, schemaHash)) {
+                schemaHash = hash;
+                RunnerNotification.setRequiresNewRunnerDetails();
             }
-            schemaHash = hash;
-            String runnerInfo = System.getenv(DEV_MODE_RUNNER_INFO_FILE);
-            if (runnerInfo != null) {
-                Path path = Path.of(runnerInfo);
-                // Delete the runner info file if it already exists
-                Files.deleteIfExists(path);
-                // This method tells the runtime not to actually start until we have updated runner details
-                systemPropertyBuildItemBuildProducer
-                        .produce(new SystemPropertyBuildItem(FTLRecorder.DEV_MODE_RUNNER_INFO_PATH, path.toString()));
-                recorder.handleDevModeRunnerStart(shutdownContextBuildItem);
+        } else {
+            output = outputTargetBuildItem.getOutputDirectory().resolve("launch");
+            try (var out = Files.newOutputStream(output)) {
+                out.write(
+                        """
+                                #!/bin/bash
+                                if [ -n "$FTL_DEBUG_PORT" ]; then
+                                    FTL_JVM_OPTS="$FTL_JVM_OPTS -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=*:$FTL_DEBUG_PORT"
+                                fi
+                                exec java $FTL_JVM_OPTS -jar quarkus-app/quarkus-run.jar"""
+                                .getBytes(StandardCharsets.UTF_8));
             }
+            var perms = Files.getPosixFilePermissions(output);
+            EnumSet<PosixFilePermission> newPerms = EnumSet.copyOf(perms);
+            newPerms.add(PosixFilePermission.GROUP_EXECUTE);
+            newPerms.add(PosixFilePermission.OWNER_EXECUTE);
+            Files.setPosixFilePermissions(output, newPerms);
         }
-        recorder.loadModuleContextOnStartup();
-
-        Files.write(output, schBytes);
-        Files.write(errorOutput, errBytes);
-
-        output = outputTargetBuildItem.getOutputDirectory().resolve("launch");
-        try (var out = Files.newOutputStream(output)) {
-            out.write(
-                    """
-                            #!/bin/bash
-                            if [ -n "$FTL_DEBUG_PORT" ]; then
-                                FTL_JVM_OPTS="$FTL_JVM_OPTS -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=*:$FTL_DEBUG_PORT"
-                            fi
-                            exec java $FTL_JVM_OPTS -jar quarkus-app/quarkus-run.jar"""
-                            .getBytes(StandardCharsets.UTF_8));
-        }
-        var perms = Files.getPosixFilePermissions(output);
-        EnumSet<PosixFilePermission> newPerms = EnumSet.copyOf(perms);
-        newPerms.add(PosixFilePermission.GROUP_EXECUTE);
-        newPerms.add(PosixFilePermission.OWNER_EXECUTE);
-        Files.setPosixFilePermissions(output, newPerms);
     }
 
     @BuildStep
@@ -319,10 +242,4 @@ void openSocket(BuildProducer<RequireVirtualHttpBuildItem> virtual,
         socket.produce(RequireSocketHttpBuildItem.MARKER);
         virtual.produce(RequireVirtualHttpBuildItem.MARKER);
     }
-
-    @Record(ExecutionTime.RUNTIME_INIT)
-    @BuildStep(onlyIf = IsDevelopment.class)
-    void hotReload(ShutdownContextBuildItem shutdownContextBuildItem, FTLRecorder recorder) {
-        recorder.startReloadTimer(shutdownContextBuildItem);
-    }
 }
diff --git a/jvm-runtime/ftl-runtime/common/hotreload/pom.xml b/jvm-runtime/ftl-runtime/common/hotreload/pom.xml
new file mode 100644
index 0000000000..bf28b9b7c2
--- /dev/null
+++ b/jvm-runtime/ftl-runtime/common/hotreload/pom.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>xyz.block.ftl</groupId>
+        <artifactId>ftl-jvm-runtime-parent</artifactId>
+        <version>1.0-SNAPSHOT</version>
+    </parent>
+    <artifactId>ftl-jvm-hot-reload</artifactId>
+    <name>FTL Java Runtime - Hot Reload SPI</name>
+
+</project>
diff --git a/jvm-runtime/ftl-runtime/common/hotreload/src/main/java/xyz/block/ftl/hotreload/RunnerInfo.java b/jvm-runtime/ftl-runtime/common/hotreload/src/main/java/xyz/block/ftl/hotreload/RunnerInfo.java
new file mode 100644
index 0000000000..dfaa55b63f
--- /dev/null
+++ b/jvm-runtime/ftl-runtime/common/hotreload/src/main/java/xyz/block/ftl/hotreload/RunnerInfo.java
@@ -0,0 +1,7 @@
+package xyz.block.ftl.hotreload;
+
+import java.util.Map;
+
+public record RunnerInfo(String address, String deployment, Map<String, String> databases) {
+
+}
diff --git a/jvm-runtime/ftl-runtime/common/hotreload/src/main/java/xyz/block/ftl/hotreload/RunnerNotification.java b/jvm-runtime/ftl-runtime/common/hotreload/src/main/java/xyz/block/ftl/hotreload/RunnerNotification.java
new file mode 100644
index 0000000000..a74492093f
--- /dev/null
+++ b/jvm-runtime/ftl-runtime/common/hotreload/src/main/java/xyz/block/ftl/hotreload/RunnerNotification.java
@@ -0,0 +1,47 @@
+package xyz.block.ftl.hotreload;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.function.Consumer;
+
+public class RunnerNotification {
+
+    private static volatile Consumer<RunnerInfo> callback;
+    private static volatile RunnerInfo info;
+    private static final AtomicBoolean requiresNewRunnerDetails = new AtomicBoolean(false);
+    private static final List<Runnable> runnerDetailsCallbacks = Collections.synchronizedList(new ArrayList<>());
+
+    public static synchronized void setCallback(Consumer<RunnerInfo> callback) {
+        if (RunnerNotification.callback != null) {
+            throw new IllegalStateException("Callback already set");
+        }
+        if (info != null) {
+            callback.accept(info);
+            info = null;
+        } else {
+            RunnerNotification.callback = callback;
+        }
+    }
+
+    public static synchronized void setRunnerInfo(RunnerInfo info) {
+        if (callback != null) {
+            callback.accept(info);
+            callback = null;
+        } else {
+            RunnerNotification.info = info;
+        }
+    }
+
+    public static synchronized void setRequiresNewRunnerDetails() {
+        for (Runnable callback : runnerDetailsCallbacks) {
+            callback.run();
+        }
+    }
+
+    public static synchronized void onRunnerDetails(Runnable callback) {
+        runnerDetailsCallbacks.add(callback);
+    }
+
+}
diff --git a/jvm-runtime/ftl-runtime/common/pom.xml b/jvm-runtime/ftl-runtime/common/pom.xml
index 3aa2e02a32..74a2a85925 100644
--- a/jvm-runtime/ftl-runtime/common/pom.xml
+++ b/jvm-runtime/ftl-runtime/common/pom.xml
@@ -18,5 +18,6 @@
         <module>runtime</module>
         <module>bom</module>
         <module>build-parent</module>
+        <module>hotreload</module>
     </modules>
 </project>
diff --git a/jvm-runtime/ftl-runtime/common/runtime/pom.xml b/jvm-runtime/ftl-runtime/common/runtime/pom.xml
index 89362d3694..133ed0e98e 100644
--- a/jvm-runtime/ftl-runtime/common/runtime/pom.xml
+++ b/jvm-runtime/ftl-runtime/common/runtime/pom.xml
@@ -12,6 +12,10 @@
     <name>FTL Java Runtime - Runtime</name>
 
     <dependencies>
+        <dependency>
+            <groupId>xyz.block.ftl</groupId>
+            <artifactId>ftl-jvm-hot-reload</artifactId>
+        </dependency>
         <dependency>
             <groupId>io.quarkus</groupId>
             <artifactId>quarkus-arc</artifactId>
@@ -100,8 +104,8 @@
                             <goal>extension-descriptor</goal>
                         </goals>
                         <configuration>
-                            <deployment>${project.groupId}:${project.artifactId}-deployment:${project.version}
-                            </deployment>
+                            <deployment>${project.groupId}:${project.artifactId}-deployment:${project.version}</deployment>
+                            <parentFirstArtifacts>xyz.block.ftl:ftl-jvm-hot-reload</parentFirstArtifacts>
                         </configuration>
                     </execution>
                 </executions>
@@ -164,6 +168,7 @@
                                 <include>**/lease.proto</include>
                                 <include>**/ftl.proto</include>
                                 <include>**/language.proto</include>
+                                <include>**/hotreload.proto</include>
                                 <include>**/publish.proto</include>
                                 <include>**/pubsub.proto</include>
                             </includes>
diff --git a/jvm-runtime/ftl-runtime/common/runtime/src/main/java/xyz/block/ftl/runtime/DevModeRunnerDetails.java b/jvm-runtime/ftl-runtime/common/runtime/src/main/java/xyz/block/ftl/runtime/DevModeRunnerDetails.java
index 36fc9235b4..6a31e86510 100644
--- a/jvm-runtime/ftl-runtime/common/runtime/src/main/java/xyz/block/ftl/runtime/DevModeRunnerDetails.java
+++ b/jvm-runtime/ftl-runtime/common/runtime/src/main/java/xyz/block/ftl/runtime/DevModeRunnerDetails.java
@@ -1,69 +1,32 @@
 package xyz.block.ftl.runtime;
 
-import java.io.IOException;
-import java.io.InputStream;
-import java.nio.file.Files;
-import java.nio.file.Path;
-import java.util.HashMap;
 import java.util.Map;
 import java.util.Optional;
-import java.util.Properties;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
 
 import xyz.block.ftl.deployment.v1.GetDeploymentContextResponse;
+import xyz.block.ftl.hotreload.RunnerInfo;
+import xyz.block.ftl.hotreload.RunnerNotification;
 
 public class DevModeRunnerDetails implements RunnerDetails {
 
-    private final Path path;
     private volatile Map<String, String> databases;
     private volatile String proxyAddress;
     private volatile String deployment;
     private volatile boolean closed;
-    private static final Pattern dbNames = Pattern.compile("database\\.([a-zA-Z0-9]+).url");
     private volatile boolean loaded = false;
 
-    public DevModeRunnerDetails(Path path) {
-        this.path = path;
-        startWatchThread();
+    public DevModeRunnerDetails() {
+        RunnerNotification.setCallback(this::setRunnerInfo);
     }
 
-    void startWatchThread() {
-        Thread watchThread = new Thread(() -> {
-            while (!closed) {
-                try {
-                    Thread.sleep(100);
-                } catch (InterruptedException e) {
-                    throw new RuntimeException(e);
-                }
-                if (Files.exists(path)) {
-                    Properties p = new Properties();
-                    try (InputStream stream = Files.newInputStream(path)) {
-                        p.load(stream);
-                        synchronized (this) {
-                            proxyAddress = p.getProperty("proxy.bind.address");
-                            deployment = p.getProperty("deployment");
-                            var dbs = new HashMap<String, String>();
-                            for (var addr : p.stringPropertyNames()) {
-                                Matcher m = dbNames.matcher(addr);
-                                if (m.matches()) {
-                                    dbs.put(m.group(1), p.getProperty(addr));
-                                }
-                            }
-                            databases = dbs;
-                            loaded = true;
-                            notifyAll();
-                            return;
-                        }
-
-                    } catch (IOException e) {
-                        throw new RuntimeException(e);
-                    }
-                }
-            }
-        });
-        watchThread.setDaemon(true);
-        watchThread.start();
+    private void setRunnerInfo(RunnerInfo runnerInfo) {
+        synchronized (this) {
+            proxyAddress = runnerInfo.address();
+            deployment = runnerInfo.deployment();
+            databases = runnerInfo.databases();
+            loaded = true;
+            notifyAll();
+        }
     }
 
     @Override
diff --git a/jvm-runtime/ftl-runtime/common/runtime/src/main/java/xyz/block/ftl/runtime/FTLController.java b/jvm-runtime/ftl-runtime/common/runtime/src/main/java/xyz/block/ftl/runtime/FTLController.java
index 485272af46..f092166aa8 100644
--- a/jvm-runtime/ftl-runtime/common/runtime/src/main/java/xyz/block/ftl/runtime/FTLController.java
+++ b/jvm-runtime/ftl-runtime/common/runtime/src/main/java/xyz/block/ftl/runtime/FTLController.java
@@ -1,6 +1,5 @@
 package xyz.block.ftl.runtime;
 
-import java.nio.file.Path;
 import java.time.Duration;
 import java.util.List;
 import java.util.Map;
@@ -13,6 +12,7 @@
 import xyz.block.ftl.LeaseFailedException;
 import xyz.block.ftl.LeaseHandle;
 import xyz.block.ftl.deployment.v1.GetDeploymentContextResponse;
+import xyz.block.ftl.hotreload.RunnerNotification;
 
 public class FTLController implements LeaseClient {
     private static final Logger log = Logger.getLogger(FTLController.class);
@@ -44,6 +44,7 @@ public static FTLController instance() {
         this.moduleName = System.getProperty("ftl.module.name");
         if (LaunchMode.current() != LaunchMode.DEVELOPMENT) {
             haveRunnerInfo = true;
+            RunnerNotification.onRunnerDetails(this::devModeShutdown);
         }
     }
 
@@ -94,7 +95,7 @@ public void readDevModeRunnerInfo() {
                 runnerConnection = null;
             }
             runnerDetails.close();
-            runnerDetails = new DevModeRunnerDetails(Path.of(System.getProperty(FTLRecorder.DEV_MODE_RUNNER_INFO_PATH)));
+            runnerDetails = new DevModeRunnerDetails();
             haveRunnerInfo = true;
             this.notifyAll();
         }
diff --git a/jvm-runtime/ftl-runtime/common/runtime/src/main/java/xyz/block/ftl/runtime/FTLRecorder.java b/jvm-runtime/ftl-runtime/common/runtime/src/main/java/xyz/block/ftl/runtime/FTLRecorder.java
index 8edd90fb34..4ed04f1ed8 100644
--- a/jvm-runtime/ftl-runtime/common/runtime/src/main/java/xyz/block/ftl/runtime/FTLRecorder.java
+++ b/jvm-runtime/ftl-runtime/common/runtime/src/main/java/xyz/block/ftl/runtime/FTLRecorder.java
@@ -3,8 +3,6 @@
 import java.lang.reflect.Constructor;
 import java.lang.reflect.InvocationTargetException;
 import java.util.List;
-import java.util.Timer;
-import java.util.TimerTask;
 
 import org.jboss.resteasy.reactive.server.core.ResteasyReactiveRequestContext;
 import org.jboss.resteasy.reactive.server.core.parameters.ParameterExtractor;
@@ -12,7 +10,6 @@
 import com.fasterxml.jackson.databind.ObjectMapper;
 
 import io.quarkus.arc.Arc;
-import io.quarkus.runtime.ShutdownContext;
 import io.quarkus.runtime.annotations.Recorder;
 import xyz.block.ftl.deployment.v1.GetDeploymentContextResponse;
 import xyz.block.ftl.runtime.http.FTLHttpHandler;
@@ -23,7 +20,6 @@
 public class FTLRecorder {
 
     public static final String X_FTL_VERB = "X-ftl-verb";
-    public static final String DEV_MODE_RUNNER_INFO_PATH = "ftl.dev.runner.info";
 
     public void registerVerb(String module, String verbName, String methodName, List<Class<?>> parameterTypes,
             Class<?> verbHandlerClass, List<VerbRegistry.ParameterSupplier> paramMappers,
@@ -157,34 +153,13 @@ public Object extractParameter(ResteasyReactiveRequestContext context) {
         }
     }
 
-    public void startReloadTimer(ShutdownContext shutdownContext) {
-        Timer t = new Timer("FTL Hot Reload Timer", true);
-        t.schedule(new TimerTask() {
-            @Override
-            public void run() {
-                HotReloadSetup.doScan(false);
-            }
-        }, 1000, 1000);
-        shutdownContext.addShutdownTask(new Runnable() {
-            @Override
-            public void run() {
-                t.cancel();
-            }
-        });
-    }
-
     public void registerDatabase(String dbKind, GetDeploymentContextResponse.DbType name) {
         FTLController.instance().registerDatabase(dbKind, name);
     }
 
-    public void handleDevModeRunnerStart(ShutdownContext shutdownContext) {
+    public void requireNewRunnerDetails() {
+        FTLController.instance().devModeShutdown();
         FTLController.instance().readDevModeRunnerInfo();
-        shutdownContext.addShutdownTask(new Runnable() {
-            @Override
-            public void run() {
-                FTLController.instance().devModeShutdown();
-            }
-        });
     }
 
     public void loadModuleContextOnStartup() {
diff --git a/jvm-runtime/ftl-runtime/common/runtime/src/main/java/xyz/block/ftl/runtime/HotReloadSetup.java b/jvm-runtime/ftl-runtime/common/runtime/src/main/java/xyz/block/ftl/runtime/HotReloadSetup.java
deleted file mode 100644
index 52900ddaf2..0000000000
--- a/jvm-runtime/ftl-runtime/common/runtime/src/main/java/xyz/block/ftl/runtime/HotReloadSetup.java
+++ /dev/null
@@ -1,66 +0,0 @@
-package xyz.block.ftl.runtime;
-
-import java.io.IOException;
-import java.nio.file.Files;
-import java.nio.file.Path;
-import java.util.Collections;
-import java.util.Set;
-import java.util.concurrent.ConcurrentHashMap;
-import java.util.concurrent.atomic.AtomicBoolean;
-
-import org.jboss.logging.Logger;
-
-import io.quarkus.dev.spi.HotReplacementContext;
-import io.quarkus.dev.spi.HotReplacementSetup;
-
-public class HotReloadSetup implements HotReplacementSetup {
-
-    static final Set<Path> existingMigrations = Collections.newSetFromMap(new ConcurrentHashMap<>());
-
-    static volatile HotReplacementContext context;
-    private static volatile String errorOutputPath;
-    private static final String ERRORS_OUT = "errors.pb";
-
-    @Override
-    public void setupHotDeployment(HotReplacementContext hrc) {
-        context = hrc;
-        for (var dir : context.getSourcesDir()) {
-            Path migrations = dir.resolve("db");
-            if (Files.isDirectory(migrations)) {
-                try (var stream = Files.walk(migrations)) {
-                    stream.forEach(p -> {
-                        existingMigrations.add(p);
-
-                    });
-                } catch (IOException e) {
-                    throw new RuntimeException(e);
-                }
-            }
-        }
-    }
-
-    static void doScan(boolean force) {
-        if (context != null) {
-            try {
-                AtomicBoolean newForce = new AtomicBoolean();
-                for (var dir : context.getSourcesDir()) {
-                    Path migrations = dir.resolve("db");
-                    if (Files.isDirectory(migrations)) {
-                        try (var stream = Files.walk(migrations)) {
-                            stream.forEach(p -> {
-                                if (p.getFileName().toString().endsWith(".sql")) {
-                                    if (existingMigrations.add(p)) {
-                                        newForce.set(true);
-                                    }
-                                }
-                            });
-                        }
-                    }
-                }
-                context.doScan(force || newForce.get());
-            } catch (Exception e) {
-                Logger.getLogger(HotReloadSetup.class).error("Failed to scan for changes", e);
-            }
-        }
-    }
-}
diff --git a/jvm-runtime/ftl-runtime/common/runtime/src/main/resources/META-INF/services/io.quarkus.dev.spi.HotReplacementSetup b/jvm-runtime/ftl-runtime/common/runtime/src/main/resources/META-INF/services/io.quarkus.dev.spi.HotReplacementSetup
deleted file mode 100644
index f02b221da3..0000000000
--- a/jvm-runtime/ftl-runtime/common/runtime/src/main/resources/META-INF/services/io.quarkus.dev.spi.HotReplacementSetup
+++ /dev/null
@@ -1 +0,0 @@
-xyz.block.ftl.runtime.HotReloadSetup
\ No newline at end of file
diff --git a/jvm-runtime/ftl-runtime/pom.xml b/jvm-runtime/ftl-runtime/pom.xml
index c9e2333377..61426032c4 100644
--- a/jvm-runtime/ftl-runtime/pom.xml
+++ b/jvm-runtime/ftl-runtime/pom.xml
@@ -73,6 +73,11 @@
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>
+            <dependency>
+                <groupId>xyz.block.ftl</groupId>
+                <artifactId>ftl-jvm-hot-reload</artifactId>
+                <version>${project.version}</version>
+            </dependency>
             <dependency>
                 <groupId>xyz.block.ftl</groupId>
                 <artifactId>ftl-jvm-runtime</artifactId>
diff --git a/jvm-runtime/plugin/common/jvmcommon.go b/jvm-runtime/plugin/common/jvmcommon.go
index fa64f54ae0..27666205d5 100644
--- a/jvm-runtime/plugin/common/jvmcommon.go
+++ b/jvm-runtime/plugin/common/jvmcommon.go
@@ -7,7 +7,6 @@ import (
 	"context"
 	"fmt"
 	"io/fs"
-	"net/http"
 	"os"
 	"path/filepath"
 	"reflect"
@@ -24,11 +23,14 @@ import (
 	"github.com/beevik/etree"
 	"github.com/block/scaffolder"
 	"github.com/go-viper/mapstructure/v2"
+	"github.com/jpillora/backoff"
 	"golang.org/x/exp/maps"
 	"google.golang.org/protobuf/proto"
 	"google.golang.org/protobuf/types/known/structpb"
 
 	"github.com/block/ftl"
+	hotreloadpb "github.com/block/ftl/backend/protos/xyz/block/ftl/hotreload/v1"
+	"github.com/block/ftl/backend/protos/xyz/block/ftl/hotreload/v1/hotreloadpbconnect"
 	langpb "github.com/block/ftl/backend/protos/xyz/block/ftl/language/v1"
 	langconnect "github.com/block/ftl/backend/protos/xyz/block/ftl/language/v1/languagepbconnect"
 	ftlv1 "github.com/block/ftl/backend/protos/xyz/block/ftl/v1"
@@ -45,6 +47,7 @@ import (
 	"github.com/block/ftl/internal/flock"
 	"github.com/block/ftl/internal/log"
 	"github.com/block/ftl/internal/moduleconfig"
+	"github.com/block/ftl/internal/rpc"
 	"github.com/block/ftl/internal/watch"
 )
 
@@ -247,6 +250,7 @@ func (s *Service) runDevMode(ctx context.Context, req *connect.Request[langpb.Bu
 		err := s.runQuarkusDev(ctx, req, stream, first)
 		first = false
 		if err != nil {
+			log.FromContext(ctx).Errorf(err, "Dev mode process exited")
 			return err
 		}
 		if !waitForFileChanges(ctx, fileEvents) {
@@ -342,10 +346,8 @@ func (s *Service) runQuarkusDev(ctx context.Context, req *connect.Request[langpb
 	}
 	errorFile := filepath.Join(buildCtx.Config.DeployDir, ErrorFile)
 	schemaFile := filepath.Join(buildCtx.Config.DeployDir, SchemaFile)
-	runnerInfoFile := filepath.Join(buildCtx.Config.Dir, ".ftl-runner-info")
 	os.Remove(errorFile)
 	os.Remove(schemaFile)
-	os.Remove(runnerInfoFile)
 	errorHash := sha256.SHA256{}
 	schemaHash := sha256.SHA256{}
 	migrationHash := watch.FileHashes{}
@@ -357,7 +359,8 @@ func (s *Service) runQuarkusDev(ctx context.Context, req *connect.Request[langpb
 	}
 
 	ctx = log.ContextWithLogger(ctx, logger)
-	bind := fmt.Sprintf("http://localhost:%d", address.Port)
+	devModeEndpoint := fmt.Sprintf("http://localhost:%d", address.Port)
+	bind := devModeEndpoint
 	devModeBuild := buildCtx.Config.DevModeBuild
 	debugPort, err := plugin.AllocatePort()
 	debugPort32 := int32(debugPort.Port)
@@ -365,14 +368,19 @@ func (s *Service) runQuarkusDev(ctx context.Context, req *connect.Request[langpb
 	if err == nil {
 		devModeBuild = fmt.Sprintf("%s -Ddebug=%d", devModeBuild, debugPort.Port)
 	}
+	hotReloadPort, err := plugin.AllocatePort()
+	if err != nil {
+		return fmt.Errorf("could not allocate port: %w", err)
+	}
+	devModeBuild = fmt.Sprintf("%s -Dftl.language.port=%d", devModeBuild, hotReloadPort.Port)
+
 	if os.Getenv("FTL_SUSPEND") == "true" {
 		devModeBuild += " -Dsuspend "
 	}
 	go func() {
 		logger.Infof("Using dev mode build command '%s'", devModeBuild)
 		command := exec.Command(ctx, log.Debug, buildCtx.Config.Dir, "bash", "-c", devModeBuild)
-		command.Env = append(command.Env, fmt.Sprintf("FTL_BIND=%s", bind))
-		command.Env = append(command.Env, fmt.Sprintf("FTL_RUNNER_INFO=%s", runnerInfoFile))
+		command.Env = append(command.Env, fmt.Sprintf("FTL_BIND=%s", bind), "MAVEN_OPTS=-Xmx1024m")
 		command.Stdout = os.Stdout
 		command.Stderr = os.Stderr
 		err = command.Run()
@@ -385,11 +393,22 @@ func (s *Service) runQuarkusDev(ctx context.Context, req *connect.Request[langpb
 	}()
 
 	forceUpdate := false
-	schemaChangeTicker := time.NewTicker(100 * time.Millisecond)
+	// Wait for the plugin to start.
+	hotReloadEndpoint := fmt.Sprintf("http://localhost:%d", hotReloadPort.Port)
+	client := rpc.Dial(hotreloadpbconnect.NewHotReloadServiceClient, hotReloadEndpoint, log.Trace)
+	err = rpc.Wait(ctx, backoff.Backoff{}, time.Minute, client)
+	if err != nil {
+		logger.Infof("Dev mode process failed to start")
+		return fmt.Errorf("timed out waiting for start %w", err)
+	}
+	logger.Debugf("Dev mode process started")
+
+	schemaChangeTicker := time.NewTicker(500 * time.Millisecond)
 	defer schemaChangeTicker.Stop()
 	for {
 		select {
 		case <-ctx.Done():
+			logger.Debugf("Context done")
 			// the context is done before we notified the build engine
 			// we need to send a build failure event
 			err = stream.Send(&langpb.BuildResponse{Event: &langpb.BuildResponse_BuildFailure{
@@ -403,25 +422,30 @@ func (s *Service) runQuarkusDev(ctx context.Context, req *connect.Request[langpb
 			}
 			return nil
 		case bc := <-events:
+			logger.Debugf("Build context updated")
 			buildCtx = bc.buildCtx
 			forceUpdate = true
-
-			// Force a hot reload by sending a HEAD request to the dev server
-			req, err := http.NewRequestWithContext(ctx, http.MethodHead, bind, nil)
+			result, err := client.Reload(ctx, connect.NewRequest(&hotreloadpb.ReloadRequest{Force: true}))
 			if err != nil {
-				logger.Errorf(err, "could not create request to force build context update")
-				continue
+				return fmt.Errorf("failed to invoke hot reload for build context update %w", err)
+			}
+			resp := s.toBuildResponse(result.Msg, &bc.buildCtx, false, devModeEndpoint, debugPort32, hotReloadEndpoint)
+			if resp != nil {
+				err = stream.Send(resp)
 			}
-			resp, err := http.DefaultClient.Do(req)
 			if err != nil {
-				logger.Errorf(err, "could not send request to force build context update")
-				continue
+				return fmt.Errorf("failed to send response %w", err)
 			}
-			resp.Body.Close()
-
 		case <-schemaChangeTicker.C:
-
 			changed := false
+			if !firstAttempt {
+				logger.Debugf("Calling reload")
+				_, err := client.Reload(ctx, connect.NewRequest(&hotreloadpb.ReloadRequest{Force: false}))
+				logger.Debugf("Called reload")
+				if err != nil {
+					return fmt.Errorf("failed to invoke hot reload for build context update %w", err)
+				}
+			}
 			file, err := os.ReadFile(errorFile)
 			if err == nil {
 				sum := sha256.Sum(file)
@@ -438,6 +462,7 @@ func (s *Service) runQuarkusDev(ctx context.Context, req *connect.Request[langpb
 					schemaHash = sum
 				}
 			}
+			logger.Debugf("Checking for schema changes")
 
 			if fileExists(buildCtx.Config.SQLMigrationDirectory) {
 				newMigrationHash, err := watch.ComputeFileHashes(buildCtx.Config.SQLMigrationDirectory, true, []string{"**/*.sql"})
@@ -451,6 +476,7 @@ func (s *Service) runQuarkusDev(ctx context.Context, req *connect.Request[langpb
 			if changed || forceUpdate {
 				auto := !firstAttempt && !forceUpdate
 				if auto {
+					logger.Infof("sending auto build event")
 					err = stream.Send(&langpb.BuildResponse{Event: &langpb.BuildResponse_AutoRebuildStarted{AutoRebuildStarted: &langpb.AutoRebuildStarted{ContextId: buildCtx.ID}}})
 					if err != nil {
 						return fmt.Errorf("could not send build event: %w", err)
@@ -484,17 +510,19 @@ func (s *Service) runQuarkusDev(ctx context.Context, req *connect.Request[langpb
 					continue
 				}
 
-				logger.Infof("Live reload schema changed, sending build success event")
+				if !firstAttempt {
+					logger.Infof("Live reload schema changed, sending build success event")
+				}
 				err = stream.Send(&langpb.BuildResponse{
 					Event: &langpb.BuildResponse_BuildSuccess{
 						BuildSuccess: &langpb.BuildSuccess{
-							ContextId:          buildCtx.ID,
-							IsAutomaticRebuild: auto,
-							Module:             moduleProto,
-							DevEndpoint:        ptr(fmt.Sprintf("http://localhost:%d", address.Port)),
-							DevRunnerInfoFile:  &runnerInfoFile,
-							DebugPort:          &debugPort32,
-							Deploy:             []string{SchemaFile},
+							ContextId:            buildCtx.ID,
+							IsAutomaticRebuild:   auto,
+							Module:               moduleProto,
+							DevEndpoint:          ptr(devModeEndpoint),
+							DevHotReloadEndpoint: ptr(hotReloadEndpoint),
+							DebugPort:            &debugPort32,
+							Deploy:               []string{SchemaFile},
 						},
 					},
 				})
@@ -945,3 +973,31 @@ func (s *Service) writeGenericSchemaFiles(ctx context.Context, v *schema.Schema,
 	}
 	return nil
 }
+
+func (s *Service) toBuildResponse(result *hotreloadpb.ReloadResponse, bc *buildContext, auto bool, devEndpoint string, debugPort int32, hotReloadAddress string) (ret *langpb.BuildResponse) {
+	ret = &langpb.BuildResponse{}
+	switch e := result.Event.(type) {
+	case *hotreloadpb.ReloadResponse_ReloadSuccess:
+		ret.Event = &langpb.BuildResponse_BuildSuccess{
+			BuildSuccess: &langpb.BuildSuccess{
+				ContextId:            bc.ID,
+				IsAutomaticRebuild:   auto,
+				Module:               e.ReloadSuccess.Module,
+				Errors:               e.ReloadSuccess.Errors,
+				DevEndpoint:          &devEndpoint,
+				DebugPort:            &debugPort,
+				DevHotReloadEndpoint: &hotReloadAddress,
+			},
+		}
+
+	case *hotreloadpb.ReloadResponse_ReloadFailed:
+		ret.Event = &langpb.BuildResponse_BuildFailure{
+			BuildFailure: &langpb.BuildFailure{
+				ContextId:          bc.ID,
+				IsAutomaticRebuild: auto,
+				Errors:             e.ReloadFailed.Errors,
+			},
+		}
+	}
+	return ret
+}
diff --git a/python-runtime/ftl/src/ftl/protos/xyz/block/ftl/hotreload/v1/hotreload_pb2.py b/python-runtime/ftl/src/ftl/protos/xyz/block/ftl/hotreload/v1/hotreload_pb2.py
new file mode 100644
index 0000000000..5220f45a7d
--- /dev/null
+++ b/python-runtime/ftl/src/ftl/protos/xyz/block/ftl/hotreload/v1/hotreload_pb2.py
@@ -0,0 +1,62 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# NO CHECKED-IN PROTOBUF GENCODE
+# source: xyz/block/ftl/hotreload/v1/hotreload.proto
+# Protobuf Python Version: 5.29.2
+"""Generated protocol buffer code."""
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import descriptor_pool as _descriptor_pool
+from google.protobuf import runtime_version as _runtime_version
+from google.protobuf import symbol_database as _symbol_database
+from google.protobuf.internal import builder as _builder
+_runtime_version.ValidateProtobufRuntimeVersion(
+    _runtime_version.Domain.PUBLIC,
+    5,
+    29,
+    2,
+    '',
+    'xyz/block/ftl/hotreload/v1/hotreload.proto'
+)
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+from xyz.block.ftl.language.v1 import language_pb2 as xyz_dot_block_dot_ftl_dot_language_dot_v1_dot_language__pb2
+from xyz.block.ftl.schema.v1 import schema_pb2 as xyz_dot_block_dot_ftl_dot_schema_dot_v1_dot_schema__pb2
+from xyz.block.ftl.v1 import ftl_pb2 as xyz_dot_block_dot_ftl_dot_v1_dot_ftl__pb2
+
+
+DESCRIPTOR = _descriptor_pool.Default().AddSerializedFile(b'\n*xyz/block/ftl/hotreload/v1/hotreload.proto\x12\x1axyz.block.ftl.hotreload.v1\x1a(xyz/block/ftl/language/v1/language.proto\x1a$xyz/block/ftl/schema/v1/schema.proto\x1a\x1axyz/block/ftl/v1/ftl.proto\"%\n\rReloadRequest\x12\x14\n\x05\x66orce\x18\x01 \x01(\x08R\x05\x66orce\"\x9f\x02\n\x0eReloadResponse\x12_\n\x13reload_not_required\x18\x01 \x01(\x0b\x32-.xyz.block.ftl.hotreload.v1.ReloadNotRequiredH\x00R\x11reloadNotRequired\x12R\n\x0ereload_success\x18\x02 \x01(\x0b\x32).xyz.block.ftl.hotreload.v1.ReloadSuccessH\x00R\rreloadSuccess\x12O\n\rreload_failed\x18\x03 \x01(\x0b\x32(.xyz.block.ftl.hotreload.v1.ReloadFailedH\x00R\x0creloadFailedB\x07\n\x05\x65vent\"\x0e\n\x0cWatchRequest\"\xbd\x01\n\rWatchResponse\x12R\n\x0ereload_success\x18\x01 \x01(\x0b\x32).xyz.block.ftl.hotreload.v1.ReloadSuccessH\x00R\rreloadSuccess\x12O\n\rreload_failed\x18\x02 \x01(\x0b\x32(.xyz.block.ftl.hotreload.v1.ReloadFailedH\x00R\x0creloadFailedB\x07\n\x05\x65vent\"\x91\x01\n\x11RunnerInfoRequest\x12\x18\n\x07\x61\x64\x64ress\x18\x01 \x01(\tR\x07\x61\x64\x64ress\x12\x1e\n\ndeployment\x18\x02 \x01(\tR\ndeployment\x12\x42\n\tdatabases\x18\x03 \x03(\x0b\x32$.xyz.block.ftl.hotreload.v1.DatabaseR\tdatabases\"8\n\x08\x44\x61tabase\x12\x12\n\x04name\x18\x01 \x01(\tR\x04name\x12\x18\n\x07\x61\x64\x64ress\x18\x02 \x01(\tR\x07\x61\x64\x64ress\"\x14\n\x12RunnerInfoResponse\"\x13\n\x11ReloadNotRequired\"\x86\x01\n\rReloadSuccess\x12\x37\n\x06module\x18\x01 \x01(\x0b\x32\x1f.xyz.block.ftl.schema.v1.ModuleR\x06module\x12<\n\x06\x65rrors\x18\x02 \x01(\x0b\x32$.xyz.block.ftl.language.v1.ErrorListR\x06\x65rrors\"L\n\x0cReloadFailed\x12<\n\x06\x65rrors\x18\x01 \x01(\x0b\x32$.xyz.block.ftl.language.v1.ErrorListR\x06\x65rrors2\x8c\x03\n\x10HotReloadService\x12J\n\x04Ping\x12\x1d.xyz.block.ftl.v1.PingRequest\x1a\x1e.xyz.block.ftl.v1.PingResponse\"\x03\x90\x02\x01\x12_\n\x06Reload\x12).xyz.block.ftl.hotreload.v1.ReloadRequest\x1a*.xyz.block.ftl.hotreload.v1.ReloadResponse\x12^\n\x05Watch\x12(.xyz.block.ftl.hotreload.v1.WatchRequest\x1a).xyz.block.ftl.hotreload.v1.WatchResponse0\x01\x12k\n\nRunnerInfo\x12-.xyz.block.ftl.hotreload.v1.RunnerInfoRequest\x1a..xyz.block.ftl.hotreload.v1.RunnerInfoResponseBNP\x01ZJgithub.com/block/ftl/backend/protos/xyz/block/ftl/hotreload/v1;hotreloadpbb\x06proto3')
+
+_globals = globals()
+_builder.BuildMessageAndEnumDescriptors(DESCRIPTOR, _globals)
+_builder.BuildTopDescriptorsAndMessages(DESCRIPTOR, 'xyz.block.ftl.hotreload.v1.hotreload_pb2', _globals)
+if not _descriptor._USE_C_DESCRIPTORS:
+  _globals['DESCRIPTOR']._loaded_options = None
+  _globals['DESCRIPTOR']._serialized_options = b'P\001ZJgithub.com/block/ftl/backend/protos/xyz/block/ftl/hotreload/v1;hotreloadpb'
+  _globals['_HOTRELOADSERVICE'].methods_by_name['Ping']._loaded_options = None
+  _globals['_HOTRELOADSERVICE'].methods_by_name['Ping']._serialized_options = b'\220\002\001'
+  _globals['_RELOADREQUEST']._serialized_start=182
+  _globals['_RELOADREQUEST']._serialized_end=219
+  _globals['_RELOADRESPONSE']._serialized_start=222
+  _globals['_RELOADRESPONSE']._serialized_end=509
+  _globals['_WATCHREQUEST']._serialized_start=511
+  _globals['_WATCHREQUEST']._serialized_end=525
+  _globals['_WATCHRESPONSE']._serialized_start=528
+  _globals['_WATCHRESPONSE']._serialized_end=717
+  _globals['_RUNNERINFOREQUEST']._serialized_start=720
+  _globals['_RUNNERINFOREQUEST']._serialized_end=865
+  _globals['_DATABASE']._serialized_start=867
+  _globals['_DATABASE']._serialized_end=923
+  _globals['_RUNNERINFORESPONSE']._serialized_start=925
+  _globals['_RUNNERINFORESPONSE']._serialized_end=945
+  _globals['_RELOADNOTREQUIRED']._serialized_start=947
+  _globals['_RELOADNOTREQUIRED']._serialized_end=966
+  _globals['_RELOADSUCCESS']._serialized_start=969
+  _globals['_RELOADSUCCESS']._serialized_end=1103
+  _globals['_RELOADFAILED']._serialized_start=1105
+  _globals['_RELOADFAILED']._serialized_end=1181
+  _globals['_HOTRELOADSERVICE']._serialized_start=1184
+  _globals['_HOTRELOADSERVICE']._serialized_end=1580
+# @@protoc_insertion_point(module_scope)
diff --git a/python-runtime/ftl/src/ftl/protos/xyz/block/ftl/hotreload/v1/hotreload_pb2.pyi b/python-runtime/ftl/src/ftl/protos/xyz/block/ftl/hotreload/v1/hotreload_pb2.pyi
new file mode 100644
index 0000000000..85a63be648
--- /dev/null
+++ b/python-runtime/ftl/src/ftl/protos/xyz/block/ftl/hotreload/v1/hotreload_pb2.pyi
@@ -0,0 +1,77 @@
+from xyz.block.ftl.language.v1 import language_pb2 as _language_pb2
+from xyz.block.ftl.schema.v1 import schema_pb2 as _schema_pb2
+from xyz.block.ftl.v1 import ftl_pb2 as _ftl_pb2
+from google.protobuf.internal import containers as _containers
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from typing import ClassVar as _ClassVar, Iterable as _Iterable, Mapping as _Mapping, Optional as _Optional, Union as _Union
+
+DESCRIPTOR: _descriptor.FileDescriptor
+
+class ReloadRequest(_message.Message):
+    __slots__ = ("force",)
+    FORCE_FIELD_NUMBER: _ClassVar[int]
+    force: bool
+    def __init__(self, force: bool = ...) -> None: ...
+
+class ReloadResponse(_message.Message):
+    __slots__ = ("reload_not_required", "reload_success", "reload_failed")
+    RELOAD_NOT_REQUIRED_FIELD_NUMBER: _ClassVar[int]
+    RELOAD_SUCCESS_FIELD_NUMBER: _ClassVar[int]
+    RELOAD_FAILED_FIELD_NUMBER: _ClassVar[int]
+    reload_not_required: ReloadNotRequired
+    reload_success: ReloadSuccess
+    reload_failed: ReloadFailed
+    def __init__(self, reload_not_required: _Optional[_Union[ReloadNotRequired, _Mapping]] = ..., reload_success: _Optional[_Union[ReloadSuccess, _Mapping]] = ..., reload_failed: _Optional[_Union[ReloadFailed, _Mapping]] = ...) -> None: ...
+
+class WatchRequest(_message.Message):
+    __slots__ = ()
+    def __init__(self) -> None: ...
+
+class WatchResponse(_message.Message):
+    __slots__ = ("reload_success", "reload_failed")
+    RELOAD_SUCCESS_FIELD_NUMBER: _ClassVar[int]
+    RELOAD_FAILED_FIELD_NUMBER: _ClassVar[int]
+    reload_success: ReloadSuccess
+    reload_failed: ReloadFailed
+    def __init__(self, reload_success: _Optional[_Union[ReloadSuccess, _Mapping]] = ..., reload_failed: _Optional[_Union[ReloadFailed, _Mapping]] = ...) -> None: ...
+
+class RunnerInfoRequest(_message.Message):
+    __slots__ = ("address", "deployment", "databases")
+    ADDRESS_FIELD_NUMBER: _ClassVar[int]
+    DEPLOYMENT_FIELD_NUMBER: _ClassVar[int]
+    DATABASES_FIELD_NUMBER: _ClassVar[int]
+    address: str
+    deployment: str
+    databases: _containers.RepeatedCompositeFieldContainer[Database]
+    def __init__(self, address: _Optional[str] = ..., deployment: _Optional[str] = ..., databases: _Optional[_Iterable[_Union[Database, _Mapping]]] = ...) -> None: ...
+
+class Database(_message.Message):
+    __slots__ = ("name", "address")
+    NAME_FIELD_NUMBER: _ClassVar[int]
+    ADDRESS_FIELD_NUMBER: _ClassVar[int]
+    name: str
+    address: str
+    def __init__(self, name: _Optional[str] = ..., address: _Optional[str] = ...) -> None: ...
+
+class RunnerInfoResponse(_message.Message):
+    __slots__ = ()
+    def __init__(self) -> None: ...
+
+class ReloadNotRequired(_message.Message):
+    __slots__ = ()
+    def __init__(self) -> None: ...
+
+class ReloadSuccess(_message.Message):
+    __slots__ = ("module", "errors")
+    MODULE_FIELD_NUMBER: _ClassVar[int]
+    ERRORS_FIELD_NUMBER: _ClassVar[int]
+    module: _schema_pb2.Module
+    errors: _language_pb2.ErrorList
+    def __init__(self, module: _Optional[_Union[_schema_pb2.Module, _Mapping]] = ..., errors: _Optional[_Union[_language_pb2.ErrorList, _Mapping]] = ...) -> None: ...
+
+class ReloadFailed(_message.Message):
+    __slots__ = ("errors",)
+    ERRORS_FIELD_NUMBER: _ClassVar[int]
+    errors: _language_pb2.ErrorList
+    def __init__(self, errors: _Optional[_Union[_language_pb2.ErrorList, _Mapping]] = ...) -> None: ...
diff --git a/python-runtime/ftl/src/ftl/protos/xyz/block/ftl/language/v1/language_pb2.py b/python-runtime/ftl/src/ftl/protos/xyz/block/ftl/language/v1/language_pb2.py
index 78895592e7..57c2328990 100644
--- a/python-runtime/ftl/src/ftl/protos/xyz/block/ftl/language/v1/language_pb2.py
+++ b/python-runtime/ftl/src/ftl/protos/xyz/block/ftl/language/v1/language_pb2.py
@@ -27,7 +27,7 @@
 from xyz.block.ftl.v1 import ftl_pb2 as xyz_dot_block_dot_ftl_dot_v1_dot_ftl__pb2
 
 
-DESCRIPTOR = _descriptor_pool.Default().AddSerializedFile(b'\n(xyz/block/ftl/language/v1/language.proto\x12\x19xyz.block.ftl.language.v1\x1a\x1cgoogle/protobuf/struct.proto\x1a$xyz/block/ftl/schema/v1/schema.proto\x1a\x1axyz/block/ftl/v1/ftl.proto\"\x99\x03\n\x0cModuleConfig\x12\x12\n\x04name\x18\x01 \x01(\tR\x04name\x12\x10\n\x03\x64ir\x18\x02 \x01(\tR\x03\x64ir\x12\x1a\n\x08language\x18\x03 \x01(\tR\x08language\x12\x1d\n\ndeploy_dir\x18\x04 \x01(\tR\tdeployDir\x12\x19\n\x05\x62uild\x18\x05 \x01(\tH\x00R\x05\x62uild\x88\x01\x01\x12)\n\x0e\x64\x65v_mode_build\x18\x06 \x01(\tH\x01R\x0c\x64\x65vModeBuild\x88\x01\x01\x12\x1d\n\nbuild_lock\x18\x07 \x01(\tR\tbuildLock\x12\x14\n\x05watch\x18\t \x03(\tR\x05watch\x12@\n\x0flanguage_config\x18\n \x01(\x0b\x32\x17.google.protobuf.StructR\x0elanguageConfig\x12*\n\x11sql_migration_dir\x18\x0b \x01(\tR\x0fsqlMigrationDir\x12\"\n\rsql_query_dir\x18\x0c \x01(\tR\x0bsqlQueryDirB\x08\n\x06_buildB\x11\n\x0f_dev_mode_build\"d\n\rProjectConfig\x12\x10\n\x03\x64ir\x18\x01 \x01(\tR\x03\x64ir\x12\x12\n\x04name\x18\x02 \x01(\tR\x04name\x12\x15\n\x06no_git\x18\x03 \x01(\x08R\x05noGit\x12\x16\n\x06hermit\x18\x04 \x01(\x08R\x06hermit\"9\n\x1bGetCreateModuleFlagsRequest\x12\x1a\n\x08language\x18\x01 \x01(\tR\x08language\"\xcf\x02\n\x1cGetCreateModuleFlagsResponse\x12R\n\x05\x66lags\x18\x01 \x03(\x0b\x32<.xyz.block.ftl.language.v1.GetCreateModuleFlagsResponse.FlagR\x05\x66lags\x1a\xda\x01\n\x04\x46lag\x12\x12\n\x04name\x18\x01 \x01(\tR\x04name\x12\x12\n\x04help\x18\x02 \x01(\tR\x04help\x12\x19\n\x05\x65nvar\x18\x03 \x01(\tH\x00R\x05\x65nvar\x88\x01\x01\x12\x19\n\x05short\x18\x04 \x01(\tH\x01R\x05short\x88\x01\x01\x12%\n\x0bplaceholder\x18\x05 \x01(\tH\x02R\x0bplaceholder\x88\x01\x01\x12\x1d\n\x07\x64\x65\x66\x61ult\x18\x06 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\x01(\x0b\x32\x1f.xyz.block.ftl.schema.v1.SchemaR\x06schema\"\x1c\n\x1aSyncStubReferencesResponse2\xb9\x08\n\x0fLanguageService\x12J\n\x04Ping\x12\x1d.xyz.block.ftl.v1.PingRequest\x1a\x1e.xyz.block.ftl.v1.PingResponse\"\x03\x90\x02\x01\x12\x87\x01\n\x14GetCreateModuleFlags\x12\x36.xyz.block.ftl.language.v1.GetCreateModuleFlagsRequest\x1a\x37.xyz.block.ftl.language.v1.GetCreateModuleFlagsResponse\x12o\n\x0c\x43reateModule\x12..xyz.block.ftl.language.v1.CreateModuleRequest\x1a/.xyz.block.ftl.language.v1.CreateModuleResponse\x12\x87\x01\n\x14ModuleConfigDefaults\x12\x36.xyz.block.ftl.language.v1.ModuleConfigDefaultsRequest\x1a\x37.xyz.block.ftl.language.v1.ModuleConfigDefaultsResponse\x12x\n\x0fGetDependencies\x12\x31.xyz.block.ftl.language.v1.GetDependenciesRequest\x1a\x32.xyz.block.ftl.language.v1.GetDependenciesResponse\x12\\\n\x05\x42uild\x12\'.xyz.block.ftl.language.v1.BuildRequest\x1a(.xyz.block.ftl.language.v1.BuildResponse0\x01\x12\x84\x01\n\x13\x42uildContextUpdated\x12\x35.xyz.block.ftl.language.v1.BuildContextUpdatedRequest\x1a\x36.xyz.block.ftl.language.v1.BuildContextUpdatedResponse\x12r\n\rGenerateStubs\x12/.xyz.block.ftl.language.v1.GenerateStubsRequest\x1a\x30.xyz.block.ftl.language.v1.GenerateStubsResponse\x12\x81\x01\n\x12SyncStubReferences\x12\x34.xyz.block.ftl.language.v1.SyncStubReferencesRequest\x1a\x35.xyz.block.ftl.language.v1.SyncStubReferencesResponseBLP\x01ZHgithub.com/block/ftl/backend/protos/xyz/block/ftl/language/v1;languagepbb\x06proto3')
 
 _globals = globals()
 _builder.BuildMessageAndEnumDescriptors(DESCRIPTOR, _globals)
@@ -80,19 +80,19 @@
   _globals['_AUTOREBUILDSTARTED']._serialized_start=3086
   _globals['_AUTOREBUILDSTARTED']._serialized_end=3137
   _globals['_BUILDSUCCESS']._serialized_start=3140
-  _globals['_BUILDSUCCESS']._serialized_end=3600
-  _globals['_BUILDFAILURE']._serialized_start=3603
-  _globals['_BUILDFAILURE']._serialized_end=3817
-  _globals['_BUILDRESPONSE']._serialized_start=3820
-  _globals['_BUILDRESPONSE']._serialized_end=4103
-  _globals['_GENERATESTUBSREQUEST']._serialized_start=4106
-  _globals['_GENERATESTUBSREQUEST']._serialized_end=4402
-  _globals['_GENERATESTUBSRESPONSE']._serialized_start=4404
-  _globals['_GENERATESTUBSRESPONSE']._serialized_end=4427
-  _globals['_SYNCSTUBREFERENCESREQUEST']._serialized_start=4430
-  _globals['_SYNCSTUBREFERENCESREQUEST']._serialized_end=4649
-  _globals['_SYNCSTUBREFERENCESRESPONSE']._serialized_start=4651
-  _globals['_SYNCSTUBREFERENCESRESPONSE']._serialized_end=4679
-  _globals['_LANGUAGESERVICE']._serialized_start=4682
-  _globals['_LANGUAGESERVICE']._serialized_end=5763
+  _globals['_BUILDSUCCESS']._serialized_end=3609
+  _globals['_BUILDFAILURE']._serialized_start=3612
+  _globals['_BUILDFAILURE']._serialized_end=3826
+  _globals['_BUILDRESPONSE']._serialized_start=3829
+  _globals['_BUILDRESPONSE']._serialized_end=4112
+  _globals['_GENERATESTUBSREQUEST']._serialized_start=4115
+  _globals['_GENERATESTUBSREQUEST']._serialized_end=4411
+  _globals['_GENERATESTUBSRESPONSE']._serialized_start=4413
+  _globals['_GENERATESTUBSRESPONSE']._serialized_end=4436
+  _globals['_SYNCSTUBREFERENCESREQUEST']._serialized_start=4439
+  _globals['_SYNCSTUBREFERENCESREQUEST']._serialized_end=4658
+  _globals['_SYNCSTUBREFERENCESRESPONSE']._serialized_start=4660
+  _globals['_SYNCSTUBREFERENCESRESPONSE']._serialized_end=4688
+  _globals['_LANGUAGESERVICE']._serialized_start=4691
+  _globals['_LANGUAGESERVICE']._serialized_end=5772
 # @@protoc_insertion_point(module_scope)
diff --git a/python-runtime/ftl/src/ftl/protos/xyz/block/ftl/language/v1/language_pb2.pyi b/python-runtime/ftl/src/ftl/protos/xyz/block/ftl/language/v1/language_pb2.pyi
index 107171c3fb..513afae05e 100644
--- a/python-runtime/ftl/src/ftl/protos/xyz/block/ftl/language/v1/language_pb2.pyi
+++ b/python-runtime/ftl/src/ftl/protos/xyz/block/ftl/language/v1/language_pb2.pyi
@@ -219,7 +219,7 @@ class AutoRebuildStarted(_message.Message):
     def __init__(self, context_id: _Optional[str] = ...) -> None: ...
 
 class BuildSuccess(_message.Message):
-    __slots__ = ("context_id", "is_automatic_rebuild", "module", "deploy", "docker_image", "errors", "dev_endpoint", "debug_port", "dev_runner_info_file")
+    __slots__ = ("context_id", "is_automatic_rebuild", "module", "deploy", "docker_image", "errors", "dev_endpoint", "debug_port", "dev_hot_reload_endpoint")
     CONTEXT_ID_FIELD_NUMBER: _ClassVar[int]
     IS_AUTOMATIC_REBUILD_FIELD_NUMBER: _ClassVar[int]
     MODULE_FIELD_NUMBER: _ClassVar[int]
@@ -228,7 +228,7 @@ class BuildSuccess(_message.Message):
     ERRORS_FIELD_NUMBER: _ClassVar[int]
     DEV_ENDPOINT_FIELD_NUMBER: _ClassVar[int]
     DEBUG_PORT_FIELD_NUMBER: _ClassVar[int]
-    DEV_RUNNER_INFO_FILE_FIELD_NUMBER: _ClassVar[int]
+    DEV_HOT_RELOAD_ENDPOINT_FIELD_NUMBER: _ClassVar[int]
     context_id: str
     is_automatic_rebuild: bool
     module: _schema_pb2.Module
@@ -237,8 +237,8 @@ class BuildSuccess(_message.Message):
     errors: ErrorList
     dev_endpoint: str
     debug_port: int
-    dev_runner_info_file: str
-    def __init__(self, context_id: _Optional[str] = ..., is_automatic_rebuild: bool = ..., module: _Optional[_Union[_schema_pb2.Module, _Mapping]] = ..., deploy: _Optional[_Iterable[str]] = ..., docker_image: _Optional[str] = ..., errors: _Optional[_Union[ErrorList, _Mapping]] = ..., dev_endpoint: _Optional[str] = ..., debug_port: _Optional[int] = ..., dev_runner_info_file: _Optional[str] = ...) -> None: ...
+    dev_hot_reload_endpoint: str
+    def __init__(self, context_id: _Optional[str] = ..., is_automatic_rebuild: bool = ..., module: _Optional[_Union[_schema_pb2.Module, _Mapping]] = ..., deploy: _Optional[_Iterable[str]] = ..., docker_image: _Optional[str] = ..., errors: _Optional[_Union[ErrorList, _Mapping]] = ..., dev_endpoint: _Optional[str] = ..., debug_port: _Optional[int] = ..., dev_hot_reload_endpoint: _Optional[str] = ...) -> None: ...
 
 class BuildFailure(_message.Message):
     __slots__ = ("context_id", "is_automatic_rebuild", "errors", "invalidate_dependencies")