diff --git a/backend/protos/xyz/block/ftl/v1/language/language.proto b/backend/protos/xyz/block/ftl/v1/language/language.proto
index 09960f2f4b..4462faeb00 100644
--- a/backend/protos/xyz/block/ftl/v1/language/language.proto
+++ b/backend/protos/xyz/block/ftl/v1/language/language.proto
@@ -58,6 +58,21 @@ message CreateModuleRequest {
 // Response to a create module request.
 message CreateModuleResponse {}
 
+message ModuleConfigDefaultsRequest {
+  string path = 1;
+}
+
+message ModuleConfigDefaultsResponse {
+  string DeployDir = 1;
+	optional string build = 2;
+  optional string GeneratedSchemaDir = 3;
+  repeated string Watch = 4;
+  // TODO: remove...
+	// repeatedDeploy             []string
+	// string Errors             string
+
+}
+
 message DependenciesRequest {
   string path = 1;
   Metadata metadata = 2;
@@ -170,6 +185,8 @@ service LanguageService {
   // Generates files for a new empty module with the requested name
   rpc CreateModule(CreateModuleRequest) returns (CreateModuleResponse);
 
+  rpc ModuleConfigDefaults(ModuleConfigDefaultsRequest) returns (ModuleConfigDefaultsResponse);
+
   // Extract dependencies for a module
   rpc GetDependencies(DependenciesRequest) returns (DependenciesResponse);
 
diff --git a/internal/buildengine/languageplugin/external_plugin.go b/internal/buildengine/languageplugin/external_plugin.go
index ef11de9615..7260ef0539 100644
--- a/internal/buildengine/languageplugin/external_plugin.go
+++ b/internal/buildengine/languageplugin/external_plugin.go
@@ -140,6 +140,10 @@ func (p *externalPlugin) CreateModule(ctx context.Context, projConfig projectcon
 	return err
 }
 
+func (p *externalPlugin) GetModuleConfigDefaults(ctx context.Context, dir string) (moduleconfig.CustomDefaults, error) {
+	// resp, err := p.client.getModuleConfig(ctx, connect.NewRequest(&langpb.GetModuleConfigRequest{
+}
+
 // TODO: docs
 func (p *externalPlugin) GetDependencies(ctx context.Context, config moduleconfig.ModuleConfig) ([]string, error) {
 	resp, err := p.client.getDependencies(ctx, connect.NewRequest(&langpb.DependenciesRequest{
diff --git a/internal/buildengine/languageplugin/plugin.go b/internal/buildengine/languageplugin/plugin.go
index ec4405beae..c2f7a75052 100644
--- a/internal/buildengine/languageplugin/plugin.go
+++ b/internal/buildengine/languageplugin/plugin.go
@@ -32,19 +32,6 @@ type BuildResult struct {
 	StartTime time.Time
 }
 
-// TODO: rethink this?
-type CompilerBuildError struct {
-	err error
-}
-
-func (e CompilerBuildError) Error() string {
-	return e.err.Error()
-}
-
-func (e CompilerBuildError) Unwrap() error {
-	return e.err
-}
-
 // PluginEvent is used to notify of updates from the plugin.
 //
 //sumtype:decl