feat: Multi-Directory Workspace Support (part 3: configuration in settings.json) (#5354)

Co-authored-by: Allen Hutchison <adh@google.com>

packages/core/src/config/config.ts

@@ -188,6 +188,7 @@ export interface ConfigParameters {
   ideModeFeature?: boolean;
   ideMode?: boolean;
   ideClient: IdeClient;
+  loadMemoryFromIncludeDirectories?: boolean;
 }
 
 export class Config {
@@ -247,6 +248,7 @@ export class Config {
     | Record<string, SummarizeToolOutputSettings>
     | undefined;
   private readonly experimentalAcp: boolean = false;
+  private readonly loadMemoryFromIncludeDirectories: boolean = false;
 
   constructor(params: ConfigParameters) {
     this.sessionId = params.sessionId;
@@ -304,6 +306,8 @@ export class Config {
     this.ideModeFeature = params.ideModeFeature ?? false;
     this.ideMode = params.ideMode ?? false;
     this.ideClient = params.ideClient;
+    this.loadMemoryFromIncludeDirectories =
+      params.loadMemoryFromIncludeDirectories ?? false;
 
     if (params.contextFileName) {
       setGeminiMdFilename(params.contextFileName);
@@ -366,6 +370,10 @@ export class Config {
     return this.sessionId;
   }
 
+  shouldLoadMemoryFromIncludeDirectories(): boolean {
+    return this.loadMemoryFromIncludeDirectories;
+  }
+
   getContentGeneratorConfig(): ContentGeneratorConfig {
     return this.contentGeneratorConfig;
   }