Update contextFileName to support an optional list of strings (#1001)

packages/core/src/tools/memoryTool.test.ts

@@ -9,6 +9,7 @@ import {
   MemoryTool,
   setGeminiMdFilename,
   getCurrentGeminiMdFilename,
+  getAllGeminiMdFilenames,
   DEFAULT_CONTEXT_FILENAME,
 } from './memoryTool.js';
 import * as fs from 'fs/promises';
@@ -74,6 +75,13 @@ describe('MemoryTool', () => {
       setGeminiMdFilename('');
       expect(getCurrentGeminiMdFilename()).toBe(initialName);
     });
+
+    it('should handle an array of filenames', () => {
+      const newNames = ['CUSTOM_CONTEXT.md', 'ANOTHER_CONTEXT.md'];
+      setGeminiMdFilename(newNames);
+      expect(getCurrentGeminiMdFilename()).toBe('CUSTOM_CONTEXT.md');
+      expect(getAllGeminiMdFilenames()).toEqual(newNames);
+    });
   });
 
   describe('performAddMemoryEntry (static method)', () => {

packages/core/src/tools/memoryTool.ts

@@ -51,18 +51,32 @@ export const MEMORY_SECTION_HEADER = '## Gemini Added Memories';
 
 // This variable will hold the currently configured filename for GEMINI.md context files.
 // It defaults to DEFAULT_CONTEXT_FILENAME but can be overridden by setGeminiMdFilename.
-let currentGeminiMdFilename = DEFAULT_CONTEXT_FILENAME;
+let currentGeminiMdFilename: string | string[] = DEFAULT_CONTEXT_FILENAME;
 
-export function setGeminiMdFilename(newFilename: string): void {
-  if (newFilename && newFilename.trim() !== '') {
+export function setGeminiMdFilename(newFilename: string | string[]): void {
+  if (Array.isArray(newFilename)) {
+    if (newFilename.length > 0) {
+      currentGeminiMdFilename = newFilename.map((name) => name.trim());
+    }
+  } else if (newFilename && newFilename.trim() !== '') {
     currentGeminiMdFilename = newFilename.trim();
   }
 }
 
 export function getCurrentGeminiMdFilename(): string {
+  if (Array.isArray(currentGeminiMdFilename)) {
+    return currentGeminiMdFilename[0];
+  }
   return currentGeminiMdFilename;
 }
 
+export function getAllGeminiMdFilenames(): string[] {
+  if (Array.isArray(currentGeminiMdFilename)) {
+    return currentGeminiMdFilename;
+  }
+  return [currentGeminiMdFilename];
+}
+
 interface SaveMemoryParams {
   fact: string;
 }