diff --git a/backend/protos/xyz/block/ftl/v1/language/language.pb.go b/backend/protos/xyz/block/ftl/v1/language/language.pb.go
index fd06a4e8c9..0f89c2a668 100644
--- a/backend/protos/xyz/block/ftl/v1/language/language.pb.go
+++ b/backend/protos/xyz/block/ftl/v1/language/language.pb.go
@@ -121,58 +121,6 @@ func (Error_ErrorType) EnumDescriptor() ([]byte, []int) {
 	return file_xyz_block_ftl_v1_language_language_proto_rawDescGZIP(), []int{13, 1}
 }
 
-type LogMessage_LogLevel int32
-
-const (
-	LogMessage_DEBUG LogMessage_LogLevel = 0
-	LogMessage_INFO  LogMessage_LogLevel = 1
-	LogMessage_WARN  LogMessage_LogLevel = 2
-	LogMessage_ERROR LogMessage_LogLevel = 3
-)
-
-// Enum value maps for LogMessage_LogLevel.
-var (
-	LogMessage_LogLevel_name = map[int32]string{
-		0: "DEBUG",
-		1: "INFO",
-		2: "WARN",
-		3: "ERROR",
-	}
-	LogMessage_LogLevel_value = map[string]int32{
-		"DEBUG": 0,
-		"INFO":  1,
-		"WARN":  2,
-		"ERROR": 3,
-	}
-)
-
-func (x LogMessage_LogLevel) Enum() *LogMessage_LogLevel {
-	p := new(LogMessage_LogLevel)
-	*p = x
-	return p
-}
-
-func (x LogMessage_LogLevel) String() string {
-	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
-}
-
-func (LogMessage_LogLevel) Descriptor() protoreflect.EnumDescriptor {
-	return file_xyz_block_ftl_v1_language_language_proto_enumTypes[2].Descriptor()
-}
-
-func (LogMessage_LogLevel) Type() protoreflect.EnumType {
-	return &file_xyz_block_ftl_v1_language_language_proto_enumTypes[2]
-}
-
-func (x LogMessage_LogLevel) Number() protoreflect.EnumNumber {
-	return protoreflect.EnumNumber(x)
-}
-
-// Deprecated: Use LogMessage_LogLevel.Descriptor instead.
-func (LogMessage_LogLevel) EnumDescriptor() ([]byte, []int) {
-	return file_xyz_block_ftl_v1_language_language_proto_rawDescGZIP(), []int{20, 0}
-}
-
 // ModuleConfig contains the configuration for a module, found in the module's ftl.toml file.
 type ModuleConfig struct {
 	state         protoimpl.MessageState
@@ -1438,60 +1386,6 @@ func (x *BuildFailure) GetInvalidateDependencies() bool {
 	return false
 }
 
-// Log message from the language service.
-type LogMessage struct {
-	state         protoimpl.MessageState
-	sizeCache     protoimpl.SizeCache
-	unknownFields protoimpl.UnknownFields
-
-	Message string              `protobuf:"bytes,1,opt,name=message,proto3" json:"message,omitempty"`
-	Level   LogMessage_LogLevel `protobuf:"varint,2,opt,name=level,proto3,enum=xyz.block.ftl.v1.language.LogMessage_LogLevel" json:"level,omitempty"`
-}
-
-func (x *LogMessage) Reset() {
-	*x = LogMessage{}
-	mi := &file_xyz_block_ftl_v1_language_language_proto_msgTypes[20]
-	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
-	ms.StoreMessageInfo(mi)
-}
-
-func (x *LogMessage) String() string {
-	return protoimpl.X.MessageStringOf(x)
-}
-
-func (*LogMessage) ProtoMessage() {}
-
-func (x *LogMessage) ProtoReflect() protoreflect.Message {
-	mi := &file_xyz_block_ftl_v1_language_language_proto_msgTypes[20]
-	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 LogMessage.ProtoReflect.Descriptor instead.
-func (*LogMessage) Descriptor() ([]byte, []int) {
-	return file_xyz_block_ftl_v1_language_language_proto_rawDescGZIP(), []int{20}
-}
-
-func (x *LogMessage) GetMessage() string {
-	if x != nil {
-		return x.Message
-	}
-	return ""
-}
-
-func (x *LogMessage) GetLevel() LogMessage_LogLevel {
-	if x != nil {
-		return x.Level
-	}
-	return LogMessage_DEBUG
-}
-
 // Every type of message that can be streamed from the language plugin for a build.
 type BuildEvent struct {
 	state         protoimpl.MessageState
@@ -1503,13 +1397,12 @@ type BuildEvent struct {
 	//	*BuildEvent_AutoRebuildStarted
 	//	*BuildEvent_BuildSuccess
 	//	*BuildEvent_BuildFailure
-	//	*BuildEvent_LogMessage
 	Event isBuildEvent_Event `protobuf_oneof:"event"`
 }
 
 func (x *BuildEvent) Reset() {
 	*x = BuildEvent{}
-	mi := &file_xyz_block_ftl_v1_language_language_proto_msgTypes[21]
+	mi := &file_xyz_block_ftl_v1_language_language_proto_msgTypes[20]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1521,7 +1414,7 @@ func (x *BuildEvent) String() string {
 func (*BuildEvent) ProtoMessage() {}
 
 func (x *BuildEvent) ProtoReflect() protoreflect.Message {
-	mi := &file_xyz_block_ftl_v1_language_language_proto_msgTypes[21]
+	mi := &file_xyz_block_ftl_v1_language_language_proto_msgTypes[20]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1534,7 +1427,7 @@ func (x *BuildEvent) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use BuildEvent.ProtoReflect.Descriptor instead.
 func (*BuildEvent) Descriptor() ([]byte, []int) {
-	return file_xyz_block_ftl_v1_language_language_proto_rawDescGZIP(), []int{21}
+	return file_xyz_block_ftl_v1_language_language_proto_rawDescGZIP(), []int{20}
 }
 
 func (m *BuildEvent) GetEvent() isBuildEvent_Event {
@@ -1565,13 +1458,6 @@ func (x *BuildEvent) GetBuildFailure() *BuildFailure {
 	return nil
 }
 
-func (x *BuildEvent) GetLogMessage() *LogMessage {
-	if x, ok := x.GetEvent().(*BuildEvent_LogMessage); ok {
-		return x.LogMessage
-	}
-	return nil
-}
-
 type isBuildEvent_Event interface {
 	isBuildEvent_Event()
 }
@@ -1588,18 +1474,12 @@ type BuildEvent_BuildFailure struct {
 	BuildFailure *BuildFailure `protobuf:"bytes,4,opt,name=build_failure,json=buildFailure,proto3,oneof"`
 }
 
-type BuildEvent_LogMessage struct {
-	LogMessage *LogMessage `protobuf:"bytes,5,opt,name=log_message,json=logMessage,proto3,oneof"`
-}
-
 func (*BuildEvent_AutoRebuildStarted) isBuildEvent_Event() {}
 
 func (*BuildEvent_BuildSuccess) isBuildEvent_Event() {}
 
 func (*BuildEvent_BuildFailure) isBuildEvent_Event() {}
 
-func (*BuildEvent_LogMessage) isBuildEvent_Event() {}
-
 type GenerateStubsRequest struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -1619,7 +1499,7 @@ type GenerateStubsRequest struct {
 
 func (x *GenerateStubsRequest) Reset() {
 	*x = GenerateStubsRequest{}
-	mi := &file_xyz_block_ftl_v1_language_language_proto_msgTypes[22]
+	mi := &file_xyz_block_ftl_v1_language_language_proto_msgTypes[21]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1631,7 +1511,7 @@ func (x *GenerateStubsRequest) String() string {
 func (*GenerateStubsRequest) ProtoMessage() {}
 
 func (x *GenerateStubsRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_xyz_block_ftl_v1_language_language_proto_msgTypes[22]
+	mi := &file_xyz_block_ftl_v1_language_language_proto_msgTypes[21]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1644,7 +1524,7 @@ func (x *GenerateStubsRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use GenerateStubsRequest.ProtoReflect.Descriptor instead.
 func (*GenerateStubsRequest) Descriptor() ([]byte, []int) {
-	return file_xyz_block_ftl_v1_language_language_proto_rawDescGZIP(), []int{22}
+	return file_xyz_block_ftl_v1_language_language_proto_rawDescGZIP(), []int{21}
 }
 
 func (x *GenerateStubsRequest) GetDir() string {
@@ -1683,7 +1563,7 @@ type GenerateStubsResponse struct {
 
 func (x *GenerateStubsResponse) Reset() {
 	*x = GenerateStubsResponse{}
-	mi := &file_xyz_block_ftl_v1_language_language_proto_msgTypes[23]
+	mi := &file_xyz_block_ftl_v1_language_language_proto_msgTypes[22]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1695,7 +1575,7 @@ func (x *GenerateStubsResponse) String() string {
 func (*GenerateStubsResponse) ProtoMessage() {}
 
 func (x *GenerateStubsResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_xyz_block_ftl_v1_language_language_proto_msgTypes[23]
+	mi := &file_xyz_block_ftl_v1_language_language_proto_msgTypes[22]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1708,7 +1588,7 @@ func (x *GenerateStubsResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use GenerateStubsResponse.ProtoReflect.Descriptor instead.
 func (*GenerateStubsResponse) Descriptor() ([]byte, []int) {
-	return file_xyz_block_ftl_v1_language_language_proto_rawDescGZIP(), []int{23}
+	return file_xyz_block_ftl_v1_language_language_proto_rawDescGZIP(), []int{22}
 }
 
 type SyncStubReferencesRequest struct {
@@ -1725,7 +1605,7 @@ type SyncStubReferencesRequest struct {
 
 func (x *SyncStubReferencesRequest) Reset() {
 	*x = SyncStubReferencesRequest{}
-	mi := &file_xyz_block_ftl_v1_language_language_proto_msgTypes[24]
+	mi := &file_xyz_block_ftl_v1_language_language_proto_msgTypes[23]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1737,7 +1617,7 @@ func (x *SyncStubReferencesRequest) String() string {
 func (*SyncStubReferencesRequest) ProtoMessage() {}
 
 func (x *SyncStubReferencesRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_xyz_block_ftl_v1_language_language_proto_msgTypes[24]
+	mi := &file_xyz_block_ftl_v1_language_language_proto_msgTypes[23]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1750,7 +1630,7 @@ func (x *SyncStubReferencesRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SyncStubReferencesRequest.ProtoReflect.Descriptor instead.
 func (*SyncStubReferencesRequest) Descriptor() ([]byte, []int) {
-	return file_xyz_block_ftl_v1_language_language_proto_rawDescGZIP(), []int{24}
+	return file_xyz_block_ftl_v1_language_language_proto_rawDescGZIP(), []int{23}
 }
 
 func (x *SyncStubReferencesRequest) GetModuleConfig() *ModuleConfig {
@@ -1782,7 +1662,7 @@ type SyncStubReferencesResponse struct {
 
 func (x *SyncStubReferencesResponse) Reset() {
 	*x = SyncStubReferencesResponse{}
-	mi := &file_xyz_block_ftl_v1_language_language_proto_msgTypes[25]
+	mi := &file_xyz_block_ftl_v1_language_language_proto_msgTypes[24]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1794,7 +1674,7 @@ func (x *SyncStubReferencesResponse) String() string {
 func (*SyncStubReferencesResponse) ProtoMessage() {}
 
 func (x *SyncStubReferencesResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_xyz_block_ftl_v1_language_language_proto_msgTypes[25]
+	mi := &file_xyz_block_ftl_v1_language_language_proto_msgTypes[24]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1807,7 +1687,7 @@ func (x *SyncStubReferencesResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SyncStubReferencesResponse.ProtoReflect.Descriptor instead.
 func (*SyncStubReferencesResponse) Descriptor() ([]byte, []int) {
-	return file_xyz_block_ftl_v1_language_language_proto_rawDescGZIP(), []int{25}
+	return file_xyz_block_ftl_v1_language_language_proto_rawDescGZIP(), []int{24}
 }
 
 type GetCreateModuleFlagsResponse_Flag struct {
@@ -1826,7 +1706,7 @@ type GetCreateModuleFlagsResponse_Flag struct {
 
 func (x *GetCreateModuleFlagsResponse_Flag) Reset() {
 	*x = GetCreateModuleFlagsResponse_Flag{}
-	mi := &file_xyz_block_ftl_v1_language_language_proto_msgTypes[26]
+	mi := &file_xyz_block_ftl_v1_language_language_proto_msgTypes[25]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1838,7 +1718,7 @@ func (x *GetCreateModuleFlagsResponse_Flag) String() string {
 func (*GetCreateModuleFlagsResponse_Flag) ProtoMessage() {}
 
 func (x *GetCreateModuleFlagsResponse_Flag) ProtoReflect() protoreflect.Message {
-	mi := &file_xyz_block_ftl_v1_language_language_proto_msgTypes[26]
+	mi := &file_xyz_block_ftl_v1_language_language_proto_msgTypes[25]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2108,145 +1988,130 @@ var file_xyz_block_ftl_v1_language_language_proto_rawDesc = []byte{
 	0x12, 0x37, 0x0a, 0x17, 0x69, 0x6e, 0x76, 0x61, 0x6c, 0x69, 0x64, 0x61, 0x74, 0x65, 0x5f, 0x64,
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 }
 
 var (
@@ -2261,95 +2126,91 @@ func file_xyz_block_ftl_v1_language_language_proto_rawDescGZIP() []byte {
 	return file_xyz_block_ftl_v1_language_language_proto_rawDescData
 }
 
-var file_xyz_block_ftl_v1_language_language_proto_enumTypes = make([]protoimpl.EnumInfo, 3)
-var file_xyz_block_ftl_v1_language_language_proto_msgTypes = make([]protoimpl.MessageInfo, 27)
+var file_xyz_block_ftl_v1_language_language_proto_enumTypes = make([]protoimpl.EnumInfo, 2)
+var file_xyz_block_ftl_v1_language_language_proto_msgTypes = make([]protoimpl.MessageInfo, 26)
 var file_xyz_block_ftl_v1_language_language_proto_goTypes = []any{
 	(Error_ErrorLevel)(0),                     // 0: xyz.block.ftl.v1.language.Error.ErrorLevel
 	(Error_ErrorType)(0),                      // 1: xyz.block.ftl.v1.language.Error.ErrorType
-	(LogMessage_LogLevel)(0),                  // 2: xyz.block.ftl.v1.language.LogMessage.LogLevel
-	(*ModuleConfig)(nil),                      // 3: xyz.block.ftl.v1.language.ModuleConfig
-	(*ProjectConfig)(nil),                     // 4: xyz.block.ftl.v1.language.ProjectConfig
-	(*GetCreateModuleFlagsRequest)(nil),       // 5: xyz.block.ftl.v1.language.GetCreateModuleFlagsRequest
-	(*GetCreateModuleFlagsResponse)(nil),      // 6: xyz.block.ftl.v1.language.GetCreateModuleFlagsResponse
-	(*CreateModuleRequest)(nil),               // 7: xyz.block.ftl.v1.language.CreateModuleRequest
-	(*CreateModuleResponse)(nil),              // 8: xyz.block.ftl.v1.language.CreateModuleResponse
-	(*ModuleConfigDefaultsRequest)(nil),       // 9: xyz.block.ftl.v1.language.ModuleConfigDefaultsRequest
-	(*ModuleConfigDefaultsResponse)(nil),      // 10: xyz.block.ftl.v1.language.ModuleConfigDefaultsResponse
-	(*DependenciesRequest)(nil),               // 11: xyz.block.ftl.v1.language.DependenciesRequest
-	(*DependenciesResponse)(nil),              // 12: xyz.block.ftl.v1.language.DependenciesResponse
-	(*BuildContext)(nil),                      // 13: xyz.block.ftl.v1.language.BuildContext
-	(*BuildContextUpdatedRequest)(nil),        // 14: xyz.block.ftl.v1.language.BuildContextUpdatedRequest
-	(*BuildContextUpdatedResponse)(nil),       // 15: xyz.block.ftl.v1.language.BuildContextUpdatedResponse
-	(*Error)(nil),                             // 16: xyz.block.ftl.v1.language.Error
-	(*Position)(nil),                          // 17: xyz.block.ftl.v1.language.Position
-	(*ErrorList)(nil),                         // 18: xyz.block.ftl.v1.language.ErrorList
-	(*BuildRequest)(nil),                      // 19: xyz.block.ftl.v1.language.BuildRequest
-	(*AutoRebuildStarted)(nil),                // 20: xyz.block.ftl.v1.language.AutoRebuildStarted
-	(*BuildSuccess)(nil),                      // 21: xyz.block.ftl.v1.language.BuildSuccess
-	(*BuildFailure)(nil),                      // 22: xyz.block.ftl.v1.language.BuildFailure
-	(*LogMessage)(nil),                        // 23: xyz.block.ftl.v1.language.LogMessage
-	(*BuildEvent)(nil),                        // 24: xyz.block.ftl.v1.language.BuildEvent
-	(*GenerateStubsRequest)(nil),              // 25: xyz.block.ftl.v1.language.GenerateStubsRequest
-	(*GenerateStubsResponse)(nil),             // 26: xyz.block.ftl.v1.language.GenerateStubsResponse
-	(*SyncStubReferencesRequest)(nil),         // 27: xyz.block.ftl.v1.language.SyncStubReferencesRequest
-	(*SyncStubReferencesResponse)(nil),        // 28: xyz.block.ftl.v1.language.SyncStubReferencesResponse
-	(*GetCreateModuleFlagsResponse_Flag)(nil), // 29: xyz.block.ftl.v1.language.GetCreateModuleFlagsResponse.Flag
-	(*structpb.Struct)(nil),                   // 30: google.protobuf.Struct
-	(*schema.Schema)(nil),                     // 31: xyz.block.ftl.v1.schema.Schema
-	(*schema.Module)(nil),                     // 32: xyz.block.ftl.v1.schema.Module
-	(*v1.PingRequest)(nil),                    // 33: xyz.block.ftl.v1.PingRequest
-	(*v1.PingResponse)(nil),                   // 34: xyz.block.ftl.v1.PingResponse
+	(*ModuleConfig)(nil),                      // 2: xyz.block.ftl.v1.language.ModuleConfig
+	(*ProjectConfig)(nil),                     // 3: xyz.block.ftl.v1.language.ProjectConfig
+	(*GetCreateModuleFlagsRequest)(nil),       // 4: xyz.block.ftl.v1.language.GetCreateModuleFlagsRequest
+	(*GetCreateModuleFlagsResponse)(nil),      // 5: xyz.block.ftl.v1.language.GetCreateModuleFlagsResponse
+	(*CreateModuleRequest)(nil),               // 6: xyz.block.ftl.v1.language.CreateModuleRequest
+	(*CreateModuleResponse)(nil),              // 7: xyz.block.ftl.v1.language.CreateModuleResponse
+	(*ModuleConfigDefaultsRequest)(nil),       // 8: xyz.block.ftl.v1.language.ModuleConfigDefaultsRequest
+	(*ModuleConfigDefaultsResponse)(nil),      // 9: xyz.block.ftl.v1.language.ModuleConfigDefaultsResponse
+	(*DependenciesRequest)(nil),               // 10: xyz.block.ftl.v1.language.DependenciesRequest
+	(*DependenciesResponse)(nil),              // 11: xyz.block.ftl.v1.language.DependenciesResponse
+	(*BuildContext)(nil),                      // 12: xyz.block.ftl.v1.language.BuildContext
+	(*BuildContextUpdatedRequest)(nil),        // 13: xyz.block.ftl.v1.language.BuildContextUpdatedRequest
+	(*BuildContextUpdatedResponse)(nil),       // 14: xyz.block.ftl.v1.language.BuildContextUpdatedResponse
+	(*Error)(nil),                             // 15: xyz.block.ftl.v1.language.Error
+	(*Position)(nil),                          // 16: xyz.block.ftl.v1.language.Position
+	(*ErrorList)(nil),                         // 17: xyz.block.ftl.v1.language.ErrorList
+	(*BuildRequest)(nil),                      // 18: xyz.block.ftl.v1.language.BuildRequest
+	(*AutoRebuildStarted)(nil),                // 19: xyz.block.ftl.v1.language.AutoRebuildStarted
+	(*BuildSuccess)(nil),                      // 20: xyz.block.ftl.v1.language.BuildSuccess
+	(*BuildFailure)(nil),                      // 21: xyz.block.ftl.v1.language.BuildFailure
+	(*BuildEvent)(nil),                        // 22: xyz.block.ftl.v1.language.BuildEvent
+	(*GenerateStubsRequest)(nil),              // 23: xyz.block.ftl.v1.language.GenerateStubsRequest
+	(*GenerateStubsResponse)(nil),             // 24: xyz.block.ftl.v1.language.GenerateStubsResponse
+	(*SyncStubReferencesRequest)(nil),         // 25: xyz.block.ftl.v1.language.SyncStubReferencesRequest
+	(*SyncStubReferencesResponse)(nil),        // 26: xyz.block.ftl.v1.language.SyncStubReferencesResponse
+	(*GetCreateModuleFlagsResponse_Flag)(nil), // 27: xyz.block.ftl.v1.language.GetCreateModuleFlagsResponse.Flag
+	(*structpb.Struct)(nil),                   // 28: google.protobuf.Struct
+	(*schema.Schema)(nil),                     // 29: xyz.block.ftl.v1.schema.Schema
+	(*schema.Module)(nil),                     // 30: xyz.block.ftl.v1.schema.Module
+	(*v1.PingRequest)(nil),                    // 31: xyz.block.ftl.v1.PingRequest
+	(*v1.PingResponse)(nil),                   // 32: xyz.block.ftl.v1.PingResponse
 }
 var file_xyz_block_ftl_v1_language_language_proto_depIdxs = []int32{
-	30, // 0: xyz.block.ftl.v1.language.ModuleConfig.language_config:type_name -> google.protobuf.Struct
-	29, // 1: xyz.block.ftl.v1.language.GetCreateModuleFlagsResponse.flags:type_name -> xyz.block.ftl.v1.language.GetCreateModuleFlagsResponse.Flag
-	4,  // 2: xyz.block.ftl.v1.language.CreateModuleRequest.project_config:type_name -> xyz.block.ftl.v1.language.ProjectConfig
-	30, // 3: xyz.block.ftl.v1.language.CreateModuleRequest.Flags:type_name -> google.protobuf.Struct
-	30, // 4: xyz.block.ftl.v1.language.ModuleConfigDefaultsResponse.language_config:type_name -> google.protobuf.Struct
-	3,  // 5: xyz.block.ftl.v1.language.DependenciesRequest.module_config:type_name -> xyz.block.ftl.v1.language.ModuleConfig
-	3,  // 6: xyz.block.ftl.v1.language.BuildContext.module_config:type_name -> xyz.block.ftl.v1.language.ModuleConfig
-	31, // 7: xyz.block.ftl.v1.language.BuildContext.schema:type_name -> xyz.block.ftl.v1.schema.Schema
-	13, // 8: xyz.block.ftl.v1.language.BuildContextUpdatedRequest.buildContext:type_name -> xyz.block.ftl.v1.language.BuildContext
+	28, // 0: xyz.block.ftl.v1.language.ModuleConfig.language_config:type_name -> google.protobuf.Struct
+	27, // 1: xyz.block.ftl.v1.language.GetCreateModuleFlagsResponse.flags:type_name -> xyz.block.ftl.v1.language.GetCreateModuleFlagsResponse.Flag
+	3,  // 2: xyz.block.ftl.v1.language.CreateModuleRequest.project_config:type_name -> xyz.block.ftl.v1.language.ProjectConfig
+	28, // 3: xyz.block.ftl.v1.language.CreateModuleRequest.Flags:type_name -> google.protobuf.Struct
+	28, // 4: xyz.block.ftl.v1.language.ModuleConfigDefaultsResponse.language_config:type_name -> google.protobuf.Struct
+	2,  // 5: xyz.block.ftl.v1.language.DependenciesRequest.module_config:type_name -> xyz.block.ftl.v1.language.ModuleConfig
+	2,  // 6: xyz.block.ftl.v1.language.BuildContext.module_config:type_name -> xyz.block.ftl.v1.language.ModuleConfig
+	29, // 7: xyz.block.ftl.v1.language.BuildContext.schema:type_name -> xyz.block.ftl.v1.schema.Schema
+	12, // 8: xyz.block.ftl.v1.language.BuildContextUpdatedRequest.buildContext:type_name -> xyz.block.ftl.v1.language.BuildContext
 	0,  // 9: xyz.block.ftl.v1.language.Error.level:type_name -> xyz.block.ftl.v1.language.Error.ErrorLevel
-	17, // 10: xyz.block.ftl.v1.language.Error.pos:type_name -> xyz.block.ftl.v1.language.Position
+	16, // 10: xyz.block.ftl.v1.language.Error.pos:type_name -> xyz.block.ftl.v1.language.Position
 	1,  // 11: xyz.block.ftl.v1.language.Error.type:type_name -> xyz.block.ftl.v1.language.Error.ErrorType
-	16, // 12: xyz.block.ftl.v1.language.ErrorList.errors:type_name -> xyz.block.ftl.v1.language.Error
-	13, // 13: xyz.block.ftl.v1.language.BuildRequest.build_context:type_name -> xyz.block.ftl.v1.language.BuildContext
-	32, // 14: xyz.block.ftl.v1.language.BuildSuccess.module:type_name -> xyz.block.ftl.v1.schema.Module
-	18, // 15: xyz.block.ftl.v1.language.BuildSuccess.errors:type_name -> xyz.block.ftl.v1.language.ErrorList
-	18, // 16: xyz.block.ftl.v1.language.BuildFailure.errors:type_name -> xyz.block.ftl.v1.language.ErrorList
-	2,  // 17: xyz.block.ftl.v1.language.LogMessage.level:type_name -> xyz.block.ftl.v1.language.LogMessage.LogLevel
-	20, // 18: xyz.block.ftl.v1.language.BuildEvent.auto_rebuild_started:type_name -> xyz.block.ftl.v1.language.AutoRebuildStarted
-	21, // 19: xyz.block.ftl.v1.language.BuildEvent.build_success:type_name -> xyz.block.ftl.v1.language.BuildSuccess
-	22, // 20: xyz.block.ftl.v1.language.BuildEvent.build_failure:type_name -> xyz.block.ftl.v1.language.BuildFailure
-	23, // 21: xyz.block.ftl.v1.language.BuildEvent.log_message:type_name -> xyz.block.ftl.v1.language.LogMessage
-	32, // 22: xyz.block.ftl.v1.language.GenerateStubsRequest.module:type_name -> xyz.block.ftl.v1.schema.Module
-	3,  // 23: xyz.block.ftl.v1.language.GenerateStubsRequest.module_config:type_name -> xyz.block.ftl.v1.language.ModuleConfig
-	3,  // 24: xyz.block.ftl.v1.language.GenerateStubsRequest.native_module_config:type_name -> xyz.block.ftl.v1.language.ModuleConfig
-	3,  // 25: xyz.block.ftl.v1.language.SyncStubReferencesRequest.module_config:type_name -> xyz.block.ftl.v1.language.ModuleConfig
-	33, // 26: xyz.block.ftl.v1.language.LanguageService.Ping:input_type -> xyz.block.ftl.v1.PingRequest
-	5,  // 27: xyz.block.ftl.v1.language.LanguageService.GetCreateModuleFlags:input_type -> xyz.block.ftl.v1.language.GetCreateModuleFlagsRequest
-	7,  // 28: xyz.block.ftl.v1.language.LanguageService.CreateModule:input_type -> xyz.block.ftl.v1.language.CreateModuleRequest
-	9,  // 29: xyz.block.ftl.v1.language.LanguageService.ModuleConfigDefaults:input_type -> xyz.block.ftl.v1.language.ModuleConfigDefaultsRequest
-	11, // 30: xyz.block.ftl.v1.language.LanguageService.GetDependencies:input_type -> xyz.block.ftl.v1.language.DependenciesRequest
-	19, // 31: xyz.block.ftl.v1.language.LanguageService.Build:input_type -> xyz.block.ftl.v1.language.BuildRequest
-	14, // 32: xyz.block.ftl.v1.language.LanguageService.BuildContextUpdated:input_type -> xyz.block.ftl.v1.language.BuildContextUpdatedRequest
-	25, // 33: xyz.block.ftl.v1.language.LanguageService.GenerateStubs:input_type -> xyz.block.ftl.v1.language.GenerateStubsRequest
-	27, // 34: xyz.block.ftl.v1.language.LanguageService.SyncStubReferences:input_type -> xyz.block.ftl.v1.language.SyncStubReferencesRequest
-	34, // 35: xyz.block.ftl.v1.language.LanguageService.Ping:output_type -> xyz.block.ftl.v1.PingResponse
-	6,  // 36: xyz.block.ftl.v1.language.LanguageService.GetCreateModuleFlags:output_type -> xyz.block.ftl.v1.language.GetCreateModuleFlagsResponse
-	8,  // 37: xyz.block.ftl.v1.language.LanguageService.CreateModule:output_type -> xyz.block.ftl.v1.language.CreateModuleResponse
-	10, // 38: xyz.block.ftl.v1.language.LanguageService.ModuleConfigDefaults:output_type -> xyz.block.ftl.v1.language.ModuleConfigDefaultsResponse
-	12, // 39: xyz.block.ftl.v1.language.LanguageService.GetDependencies:output_type -> xyz.block.ftl.v1.language.DependenciesResponse
-	24, // 40: xyz.block.ftl.v1.language.LanguageService.Build:output_type -> xyz.block.ftl.v1.language.BuildEvent
-	15, // 41: xyz.block.ftl.v1.language.LanguageService.BuildContextUpdated:output_type -> xyz.block.ftl.v1.language.BuildContextUpdatedResponse
-	26, // 42: xyz.block.ftl.v1.language.LanguageService.GenerateStubs:output_type -> xyz.block.ftl.v1.language.GenerateStubsResponse
-	28, // 43: xyz.block.ftl.v1.language.LanguageService.SyncStubReferences:output_type -> xyz.block.ftl.v1.language.SyncStubReferencesResponse
-	35, // [35:44] is the sub-list for method output_type
-	26, // [26:35] is the sub-list for method input_type
-	26, // [26:26] is the sub-list for extension type_name
-	26, // [26:26] is the sub-list for extension extendee
-	0,  // [0:26] is the sub-list for field type_name
+	15, // 12: xyz.block.ftl.v1.language.ErrorList.errors:type_name -> xyz.block.ftl.v1.language.Error
+	12, // 13: xyz.block.ftl.v1.language.BuildRequest.build_context:type_name -> xyz.block.ftl.v1.language.BuildContext
+	30, // 14: xyz.block.ftl.v1.language.BuildSuccess.module:type_name -> xyz.block.ftl.v1.schema.Module
+	17, // 15: xyz.block.ftl.v1.language.BuildSuccess.errors:type_name -> xyz.block.ftl.v1.language.ErrorList
+	17, // 16: xyz.block.ftl.v1.language.BuildFailure.errors:type_name -> xyz.block.ftl.v1.language.ErrorList
+	19, // 17: xyz.block.ftl.v1.language.BuildEvent.auto_rebuild_started:type_name -> xyz.block.ftl.v1.language.AutoRebuildStarted
+	20, // 18: xyz.block.ftl.v1.language.BuildEvent.build_success:type_name -> xyz.block.ftl.v1.language.BuildSuccess
+	21, // 19: xyz.block.ftl.v1.language.BuildEvent.build_failure:type_name -> xyz.block.ftl.v1.language.BuildFailure
+	30, // 20: xyz.block.ftl.v1.language.GenerateStubsRequest.module:type_name -> xyz.block.ftl.v1.schema.Module
+	2,  // 21: xyz.block.ftl.v1.language.GenerateStubsRequest.module_config:type_name -> xyz.block.ftl.v1.language.ModuleConfig
+	2,  // 22: xyz.block.ftl.v1.language.GenerateStubsRequest.native_module_config:type_name -> xyz.block.ftl.v1.language.ModuleConfig
+	2,  // 23: xyz.block.ftl.v1.language.SyncStubReferencesRequest.module_config:type_name -> xyz.block.ftl.v1.language.ModuleConfig
+	31, // 24: xyz.block.ftl.v1.language.LanguageService.Ping:input_type -> xyz.block.ftl.v1.PingRequest
+	4,  // 25: xyz.block.ftl.v1.language.LanguageService.GetCreateModuleFlags:input_type -> xyz.block.ftl.v1.language.GetCreateModuleFlagsRequest
+	6,  // 26: xyz.block.ftl.v1.language.LanguageService.CreateModule:input_type -> xyz.block.ftl.v1.language.CreateModuleRequest
+	8,  // 27: xyz.block.ftl.v1.language.LanguageService.ModuleConfigDefaults:input_type -> xyz.block.ftl.v1.language.ModuleConfigDefaultsRequest
+	10, // 28: xyz.block.ftl.v1.language.LanguageService.GetDependencies:input_type -> xyz.block.ftl.v1.language.DependenciesRequest
+	18, // 29: xyz.block.ftl.v1.language.LanguageService.Build:input_type -> xyz.block.ftl.v1.language.BuildRequest
+	13, // 30: xyz.block.ftl.v1.language.LanguageService.BuildContextUpdated:input_type -> xyz.block.ftl.v1.language.BuildContextUpdatedRequest
+	23, // 31: xyz.block.ftl.v1.language.LanguageService.GenerateStubs:input_type -> xyz.block.ftl.v1.language.GenerateStubsRequest
+	25, // 32: xyz.block.ftl.v1.language.LanguageService.SyncStubReferences:input_type -> xyz.block.ftl.v1.language.SyncStubReferencesRequest
+	32, // 33: xyz.block.ftl.v1.language.LanguageService.Ping:output_type -> xyz.block.ftl.v1.PingResponse
+	5,  // 34: xyz.block.ftl.v1.language.LanguageService.GetCreateModuleFlags:output_type -> xyz.block.ftl.v1.language.GetCreateModuleFlagsResponse
+	7,  // 35: xyz.block.ftl.v1.language.LanguageService.CreateModule:output_type -> xyz.block.ftl.v1.language.CreateModuleResponse
+	9,  // 36: xyz.block.ftl.v1.language.LanguageService.ModuleConfigDefaults:output_type -> xyz.block.ftl.v1.language.ModuleConfigDefaultsResponse
+	11, // 37: xyz.block.ftl.v1.language.LanguageService.GetDependencies:output_type -> xyz.block.ftl.v1.language.DependenciesResponse
+	22, // 38: xyz.block.ftl.v1.language.LanguageService.Build:output_type -> xyz.block.ftl.v1.language.BuildEvent
+	14, // 39: xyz.block.ftl.v1.language.LanguageService.BuildContextUpdated:output_type -> xyz.block.ftl.v1.language.BuildContextUpdatedResponse
+	24, // 40: xyz.block.ftl.v1.language.LanguageService.GenerateStubs:output_type -> xyz.block.ftl.v1.language.GenerateStubsResponse
+	26, // 41: xyz.block.ftl.v1.language.LanguageService.SyncStubReferences:output_type -> xyz.block.ftl.v1.language.SyncStubReferencesResponse
+	33, // [33:42] is the sub-list for method output_type
+	24, // [24:33] is the sub-list for method input_type
+	24, // [24:24] is the sub-list for extension type_name
+	24, // [24:24] is the sub-list for extension extendee
+	0,  // [0:24] is the sub-list for field type_name
 }
 
 func init() { file_xyz_block_ftl_v1_language_language_proto_init() }
@@ -2360,21 +2221,20 @@ func file_xyz_block_ftl_v1_language_language_proto_init() {
 	file_xyz_block_ftl_v1_language_language_proto_msgTypes[0].OneofWrappers = []any{}
 	file_xyz_block_ftl_v1_language_language_proto_msgTypes[7].OneofWrappers = []any{}
 	file_xyz_block_ftl_v1_language_language_proto_msgTypes[13].OneofWrappers = []any{}
-	file_xyz_block_ftl_v1_language_language_proto_msgTypes[21].OneofWrappers = []any{
+	file_xyz_block_ftl_v1_language_language_proto_msgTypes[20].OneofWrappers = []any{
 		(*BuildEvent_AutoRebuildStarted)(nil),
 		(*BuildEvent_BuildSuccess)(nil),
 		(*BuildEvent_BuildFailure)(nil),
-		(*BuildEvent_LogMessage)(nil),
 	}
-	file_xyz_block_ftl_v1_language_language_proto_msgTypes[22].OneofWrappers = []any{}
-	file_xyz_block_ftl_v1_language_language_proto_msgTypes[26].OneofWrappers = []any{}
+	file_xyz_block_ftl_v1_language_language_proto_msgTypes[21].OneofWrappers = []any{}
+	file_xyz_block_ftl_v1_language_language_proto_msgTypes[25].OneofWrappers = []any{}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
 		File: protoimpl.DescBuilder{
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_xyz_block_ftl_v1_language_language_proto_rawDesc,
-			NumEnums:      3,
-			NumMessages:   27,
+			NumEnums:      2,
+			NumMessages:   26,
 			NumExtensions: 0,
 			NumServices:   1,
 		},
diff --git a/backend/protos/xyz/block/ftl/v1/language/language.proto b/backend/protos/xyz/block/ftl/v1/language/language.proto
index 4d9e121b57..087e0a1d76 100644
--- a/backend/protos/xyz/block/ftl/v1/language/language.proto
+++ b/backend/protos/xyz/block/ftl/v1/language/language.proto
@@ -233,26 +233,12 @@ message BuildFailure {
   bool invalidate_dependencies = 4;
 }
 
-// Log message from the language service.
-message LogMessage {
-  enum LogLevel {
-    DEBUG = 0;
-    INFO = 1;
-    WARN = 2;
-    ERROR = 3;
-  }
-
-  string message = 1;
-  LogLevel level = 2;
-}
-
 // Every type of message that can be streamed from the language plugin for a build.
 message BuildEvent {
   oneof event {
     AutoRebuildStarted auto_rebuild_started = 2;
     BuildSuccess build_success = 3;
     BuildFailure build_failure = 4;
-    LogMessage log_message = 5;
   }
 }
 
@@ -320,6 +306,9 @@ service LanguageService {
   //
   // Each time this call is made, the Build call must send back a corresponding BuildSuccess or BuildFailure
   // event with the updated build context id with "is_automatic_rebuild" as false.
+  //
+  // If the plugin will not be able to return a BuildSuccess or BuildFailure, such as when there is no active
+  // build stream, it must fail the BuildContextUpdated call.
   rpc BuildContextUpdated(BuildContextUpdatedRequest) returns (BuildContextUpdatedResponse);
 
   // Generate stubs for a module.
diff --git a/backend/protos/xyz/block/ftl/v1/language/languagepbconnect/language.connect.go b/backend/protos/xyz/block/ftl/v1/language/languagepbconnect/language.connect.go
index eb1af1073d..8c43b030c3 100644
--- a/backend/protos/xyz/block/ftl/v1/language/languagepbconnect/language.connect.go
+++ b/backend/protos/xyz/block/ftl/v1/language/languagepbconnect/language.connect.go
@@ -89,6 +89,9 @@ type LanguageServiceClient interface {
 	//
 	// Each time this call is made, the Build call must send back a corresponding BuildSuccess or BuildFailure
 	// event with the updated build context id with "is_automatic_rebuild" as false.
+	//
+	// If the plugin will not be able to return a BuildSuccess or BuildFailure, such as when there is no active
+	// build stream, it must fail the BuildContextUpdated call.
 	BuildContextUpdated(context.Context, *connect.Request[language.BuildContextUpdatedRequest]) (*connect.Response[language.BuildContextUpdatedResponse], error)
 	// Generate stubs for a module.
 	//
@@ -254,6 +257,9 @@ type LanguageServiceHandler interface {
 	//
 	// Each time this call is made, the Build call must send back a corresponding BuildSuccess or BuildFailure
 	// event with the updated build context id with "is_automatic_rebuild" as false.
+	//
+	// If the plugin will not be able to return a BuildSuccess or BuildFailure, such as when there is no active
+	// build stream, it must fail the BuildContextUpdated call.
 	BuildContextUpdated(context.Context, *connect.Request[language.BuildContextUpdatedRequest]) (*connect.Response[language.BuildContextUpdatedResponse], error)
 	// Generate stubs for a module.
 	//
diff --git a/backend/protos/xyz/block/ftl/v1/language/mixins.go b/backend/protos/xyz/block/ftl/v1/language/mixins.go
index 7c4285064d..e7462f488b 100644
--- a/backend/protos/xyz/block/ftl/v1/language/mixins.go
+++ b/backend/protos/xyz/block/ftl/v1/language/mixins.go
@@ -7,7 +7,6 @@ import (
 	structpb "google.golang.org/protobuf/types/known/structpb"
 
 	"github.com/TBD54566975/ftl/internal/builderrors"
-	"github.com/TBD54566975/ftl/internal/log"
 	"github.com/TBD54566975/ftl/internal/moduleconfig"
 	"github.com/TBD54566975/ftl/internal/projectconfig"
 	"github.com/TBD54566975/ftl/internal/slices"
@@ -86,36 +85,6 @@ func PosFromProto(pos *Position) optional.Option[builderrors.Position] {
 	})
 }
 
-func LogLevelFromProto(level LogMessage_LogLevel) log.Level {
-	switch level {
-	case LogMessage_INFO:
-		return log.Info
-	case LogMessage_DEBUG:
-		return log.Debug
-	case LogMessage_WARN:
-		return log.Warn
-	case LogMessage_ERROR:
-		return log.Error
-	default:
-		panic(fmt.Sprintf("unhandled log level %v", level))
-	}
-}
-
-func LogLevelToProto(level log.Level) LogMessage_LogLevel {
-	switch level {
-	case log.Info:
-		return LogMessage_INFO
-	case log.Debug:
-		return LogMessage_DEBUG
-	case log.Warn:
-		return LogMessage_WARN
-	case log.Error:
-		return LogMessage_ERROR
-	default:
-		panic(fmt.Sprintf("unhandled log level %v", level))
-	}
-}
-
 // ModuleConfigToProto converts a moduleconfig.AbsModuleConfig to a protobuf ModuleConfig.
 //
 // Absolute configs are used because relative paths may change resolve differently between parties.
diff --git a/common/plugin/serve.go b/common/plugin/serve.go
index cb3dedfc5b..70cefa6422 100644
--- a/common/plugin/serve.go
+++ b/common/plugin/serve.go
@@ -112,7 +112,7 @@ func Start[Impl any, Iface any, Config any](
 	ctx, cancel := context.WithCancel(ctx)
 	defer cancel()
 
-	// Configure logging to JSON on stdout. This will be read by the parent process.
+	// Configure logging to JSON on stderr. This will be read by the parent process.
 	logConfig := cli.LogConfig
 	logConfig.JSON = true
 	logger := log.Configure(os.Stderr, logConfig)
diff --git a/frontend/console/src/protos/xyz/block/ftl/v1/language/language_connect.ts b/frontend/console/src/protos/xyz/block/ftl/v1/language/language_connect.ts
index e9c2e15394..f30a31deba 100644
--- a/frontend/console/src/protos/xyz/block/ftl/v1/language/language_connect.ts
+++ b/frontend/console/src/protos/xyz/block/ftl/v1/language/language_connect.ts
@@ -98,6 +98,9 @@ export const LanguageService = {
      * Each time this call is made, the Build call must send back a corresponding BuildSuccess or BuildFailure
      * event with the updated build context id with "is_automatic_rebuild" as false.
      *
+     * If the plugin will not be able to return a BuildSuccess or BuildFailure, such as when there is no active
+     * build stream, it must fail the BuildContextUpdated call.
+     *
      * @generated from rpc xyz.block.ftl.v1.language.LanguageService.BuildContextUpdated
      */
     buildContextUpdated: {
diff --git a/frontend/console/src/protos/xyz/block/ftl/v1/language/language_pb.ts b/frontend/console/src/protos/xyz/block/ftl/v1/language/language_pb.ts
index b9d19488b0..bb7a822c44 100644
--- a/frontend/console/src/protos/xyz/block/ftl/v1/language/language_pb.ts
+++ b/frontend/console/src/protos/xyz/block/ftl/v1/language/language_pb.ts
@@ -1204,83 +1204,6 @@ export class BuildFailure extends Message<BuildFailure> {
   }
 }
 
-/**
- * Log message from the language service.
- *
- * @generated from message xyz.block.ftl.v1.language.LogMessage
- */
-export class LogMessage extends Message<LogMessage> {
-  /**
-   * @generated from field: string message = 1;
-   */
-  message = "";
-
-  /**
-   * @generated from field: xyz.block.ftl.v1.language.LogMessage.LogLevel level = 2;
-   */
-  level = LogMessage_LogLevel.DEBUG;
-
-  constructor(data?: PartialMessage<LogMessage>) {
-    super();
-    proto3.util.initPartial(data, this);
-  }
-
-  static readonly runtime: typeof proto3 = proto3;
-  static readonly typeName = "xyz.block.ftl.v1.language.LogMessage";
-  static readonly fields: FieldList = proto3.util.newFieldList(() => [
-    { no: 1, name: "message", kind: "scalar", T: 9 /* ScalarType.STRING */ },
-    { no: 2, name: "level", kind: "enum", T: proto3.getEnumType(LogMessage_LogLevel) },
-  ]);
-
-  static fromBinary(bytes: Uint8Array, options?: Partial<BinaryReadOptions>): LogMessage {
-    return new LogMessage().fromBinary(bytes, options);
-  }
-
-  static fromJson(jsonValue: JsonValue, options?: Partial<JsonReadOptions>): LogMessage {
-    return new LogMessage().fromJson(jsonValue, options);
-  }
-
-  static fromJsonString(jsonString: string, options?: Partial<JsonReadOptions>): LogMessage {
-    return new LogMessage().fromJsonString(jsonString, options);
-  }
-
-  static equals(a: LogMessage | PlainMessage<LogMessage> | undefined, b: LogMessage | PlainMessage<LogMessage> | undefined): boolean {
-    return proto3.util.equals(LogMessage, a, b);
-  }
-}
-
-/**
- * @generated from enum xyz.block.ftl.v1.language.LogMessage.LogLevel
- */
-export enum LogMessage_LogLevel {
-  /**
-   * @generated from enum value: DEBUG = 0;
-   */
-  DEBUG = 0,
-
-  /**
-   * @generated from enum value: INFO = 1;
-   */
-  INFO = 1,
-
-  /**
-   * @generated from enum value: WARN = 2;
-   */
-  WARN = 2,
-
-  /**
-   * @generated from enum value: ERROR = 3;
-   */
-  ERROR = 3,
-}
-// Retrieve enum metadata with: proto3.getEnumType(LogMessage_LogLevel)
-proto3.util.setEnumType(LogMessage_LogLevel, "xyz.block.ftl.v1.language.LogMessage.LogLevel", [
-  { no: 0, name: "DEBUG" },
-  { no: 1, name: "INFO" },
-  { no: 2, name: "WARN" },
-  { no: 3, name: "ERROR" },
-]);
-
 /**
  * Every type of message that can be streamed from the language plugin for a build.
  *
@@ -1308,12 +1231,6 @@ export class BuildEvent extends Message<BuildEvent> {
      */
     value: BuildFailure;
     case: "buildFailure";
-  } | {
-    /**
-     * @generated from field: xyz.block.ftl.v1.language.LogMessage log_message = 5;
-     */
-    value: LogMessage;
-    case: "logMessage";
   } | { case: undefined; value?: undefined } = { case: undefined };
 
   constructor(data?: PartialMessage<BuildEvent>) {
@@ -1327,7 +1244,6 @@ export class BuildEvent extends Message<BuildEvent> {
     { no: 2, name: "auto_rebuild_started", kind: "message", T: AutoRebuildStarted, oneof: "event" },
     { no: 3, name: "build_success", kind: "message", T: BuildSuccess, oneof: "event" },
     { no: 4, name: "build_failure", kind: "message", T: BuildFailure, oneof: "event" },
-    { no: 5, name: "log_message", kind: "message", T: LogMessage, oneof: "event" },
   ]);
 
   static fromBinary(bytes: Uint8Array, options?: Partial<BinaryReadOptions>): BuildEvent {
diff --git a/internal/buildengine/languageplugin/external_integration_test.go b/internal/buildengine/languageplugin/external_integration_test.go
index 8d67310832..3246c9fe82 100644
--- a/internal/buildengine/languageplugin/external_integration_test.go
+++ b/internal/buildengine/languageplugin/external_integration_test.go
@@ -421,8 +421,6 @@ func waitForAutoRebuildToStart(contextId string) in.Action {
 				} else {
 					logger.Warnf("ignoring build failure for unexpected context %q while waiting for auto rebuild started event for %q", event.BuildFailure.ContextId, contextId)
 				}
-			case *langpb.BuildEvent_LogMessage:
-				logger.Debugf("plugin: %s", event.LogMessage.Message)
 			}
 		}
 	}
@@ -484,9 +482,6 @@ func waitForBuildToEnd(success BuildResultType, contextId string, automaticRebui
 					additionalChecks(t, ic, e)
 				}
 				return
-
-			case *langpb.BuildEvent_LogMessage:
-				logger.Infof("plugin log: %v", event.LogMessage.Message)
 			}
 		}
 	}
@@ -495,7 +490,6 @@ func waitForBuildToEnd(success BuildResultType, contextId string, automaticRebui
 func checkForNoEvents(duration time.Duration) in.Action {
 	return func(t testing.TB, ic in.TestContext) {
 		in.Infof("Checking for no events for %v", duration)
-		logger := log.FromContext(ic.Context)
 		for {
 			select {
 			case result := <-buildChan:
@@ -508,9 +502,6 @@ func checkForNoEvents(duration time.Duration) in.Action {
 					panic(fmt.Sprintf("build success event when expecting no events: %v", event))
 				case *langpb.BuildEvent_BuildFailure:
 					panic(fmt.Sprintf("build failure event when expecting no events: %v", event))
-				case *langpb.BuildEvent_LogMessage:
-					logger.Infof("plugin log: %v", event.LogMessage.Message)
-					continue
 				}
 			case <-time.After(duration):
 				return
diff --git a/internal/buildengine/languageplugin/external_plugin.go b/internal/buildengine/languageplugin/external_plugin.go
index 9d0a4dc9e5..d505749e3d 100644
--- a/internal/buildengine/languageplugin/external_plugin.go
+++ b/internal/buildengine/languageplugin/external_plugin.go
@@ -366,9 +366,7 @@ func (p *externalPlugin) run(ctx context.Context) {
 				continue
 			}
 
-			switch event := e.Event.(type) {
-			case *langpb.BuildEvent_LogMessage:
-				logger.Logf(langpb.LogLevelFromProto(event.LogMessage.Level), "%s", event.LogMessage.Message)
+			switch e.Event.(type) {
 			case *langpb.BuildEvent_AutoRebuildStarted:
 				if _, ok := activeBuildCmd.Get(); ok {
 					logger.Debugf("ignoring automatic rebuild started during explicit build")
diff --git a/python-runtime/python-plugin/log_to_stream.go b/python-runtime/python-plugin/log_to_stream.go
deleted file mode 100644
index 19309f5f9b..0000000000
--- a/python-runtime/python-plugin/log_to_stream.go
+++ /dev/null
@@ -1,35 +0,0 @@
-package pythonplugin
-
-import (
-	"fmt"
-
-	"connectrpc.com/connect"
-
-	langpb "github.com/TBD54566975/ftl/backend/protos/xyz/block/ftl/v1/language"
-	"github.com/TBD54566975/ftl/internal/log"
-)
-
-type streamLogSink struct {
-	stream *connect.ServerStream[langpb.BuildEvent]
-}
-
-var _ log.Sink = streamLogSink{}
-
-func newLoggerForStream(level log.Level, stream *connect.ServerStream[langpb.BuildEvent]) *log.Logger {
-	return log.New(level, streamLogSink{stream: stream})
-}
-
-func (s streamLogSink) Log(e log.Entry) error {
-	err := s.stream.Send(&langpb.BuildEvent{
-		Event: &langpb.BuildEvent_LogMessage{
-			LogMessage: &langpb.LogMessage{
-				Level:   langpb.LogLevelToProto(e.Level),
-				Message: e.Message,
-			},
-		},
-	})
-	if err != nil {
-		return fmt.Errorf("could not stream log to FTL: %w", err)
-	}
-	return nil
-}
diff --git a/python-runtime/python-plugin/service.go b/python-runtime/python-plugin/service.go
index 737e2f1270..1826fba47c 100644
--- a/python-runtime/python-plugin/service.go
+++ b/python-runtime/python-plugin/service.go
@@ -105,8 +105,6 @@ func (s *Service) Build(ctx context.Context, req *connect.Request[langpb.BuildRe
 	logger := log.FromContext(ctx)
 	logger.Infof("Do python build")
 
-	ctx = log.ContextWithLogger(ctx, newLoggerForStream(log.Debug, stream))
-
 	buildCtx, err := buildContextFromProto(req.Msg.BuildContext)
 	if err != nil {
 		return err