fix: switch system prompt to avoid malformed tool_calls (#650)

* fix: switch system prompt to avoid malformed tool_calls

* fix: circular dependency issue and configurable tool-call style

* fix: regExp issue

packages/core/src/config/config.ts

@@ -521,6 +521,18 @@ export class Config {
     if (this.contentGeneratorConfig) {
       this.contentGeneratorConfig.model = newModel;
     }
+
+    // Reinitialize chat with updated configuration while preserving history
+    const geminiClient = this.getGeminiClient();
+    if (geminiClient && geminiClient.isInitialized()) {
+      // Use async operation but don't await to avoid blocking
+      geminiClient.reinitialize().catch((error) => {
+        console.error(
+          'Failed to reinitialize chat with updated config:',
+          error,
+        );
+      });
+    }
   }
 
   isInFallbackMode(): boolean {

packages/core/src/core/client.test.ts

@@ -441,7 +441,8 @@ describe('Gemini Client (client.ts)', () => {
       );
     });
 
-    it('should allow overriding model and config', async () => {
+    /* We now use model in contentGeneratorConfig in most cases. */
+    it.skip('should allow overriding model and config', async () => {
       const contents: Content[] = [
         { role: 'user', parts: [{ text: 'hello' }] },
       ];
@@ -2549,4 +2550,82 @@ ${JSON.stringify(
       expect(mockChat.setHistory).toHaveBeenCalledWith(historyWithThoughts);
     });
   });
+
+  describe('initialize', () => {
+    it('should accept extraHistory parameter and pass it to startChat', async () => {
+      const mockStartChat = vi.fn().mockResolvedValue({});
+      client['startChat'] = mockStartChat;
+
+      const extraHistory = [
+        { role: 'user', parts: [{ text: 'Previous message' }] },
+        { role: 'model', parts: [{ text: 'Previous response' }] },
+      ];
+
+      const contentGeneratorConfig = {
+        model: 'test-model',
+        apiKey: 'test-key',
+        vertexai: false,
+        authType: AuthType.USE_GEMINI,
+      };
+
+      await client.initialize(contentGeneratorConfig, extraHistory);
+
+      expect(mockStartChat).toHaveBeenCalledWith(extraHistory, 'test-model');
+    });
+
+    it('should use empty array when no extraHistory is provided', async () => {
+      const mockStartChat = vi.fn().mockResolvedValue({});
+      client['startChat'] = mockStartChat;
+
+      const contentGeneratorConfig = {
+        model: 'test-model',
+        apiKey: 'test-key',
+        vertexai: false,
+        authType: AuthType.USE_GEMINI,
+      };
+
+      await client.initialize(contentGeneratorConfig);
+
+      expect(mockStartChat).toHaveBeenCalledWith([], 'test-model');
+    });
+  });
+
+  describe('reinitialize', () => {
+    it('should reinitialize with preserved user history', async () => {
+      // Mock the initialize method
+      const mockInitialize = vi.fn().mockResolvedValue(undefined);
+      client['initialize'] = mockInitialize;
+
+      // Set up initial history with environment context + user messages
+      const mockHistory = [
+        { role: 'user', parts: [{ text: 'Environment context' }] },
+        { role: 'model', parts: [{ text: 'Got it. Thanks for the context!' }] },
+        { role: 'user', parts: [{ text: 'User message 1' }] },
+        { role: 'model', parts: [{ text: 'Model response 1' }] },
+      ];
+
+      const mockChat = {
+        getHistory: vi.fn().mockReturnValue(mockHistory),
+      };
+      client['chat'] = mockChat as unknown as GeminiChat;
+      client['getHistory'] = vi.fn().mockReturnValue(mockHistory);
+
+      await client.reinitialize();
+
+      // Should call initialize with preserved user history (excluding first 2 env messages)
+      expect(mockInitialize).toHaveBeenCalledWith(
+        expect.any(Object), // contentGeneratorConfig
+        [
+          { role: 'user', parts: [{ text: 'User message 1' }] },
+          { role: 'model', parts: [{ text: 'Model response 1' }] },
+        ],
+      );
+    });
+
+    it('should not throw error when chat is not initialized', async () => {
+      client['chat'] = undefined;
+
+      await expect(client.reinitialize()).resolves.not.toThrow();
+    });
+  });
 });

packages/core/src/core/client.ts

@@ -138,13 +138,24 @@ export class GeminiClient {
     this.lastPromptId = this.config.getSessionId();
   }
 
-  async initialize(contentGeneratorConfig: ContentGeneratorConfig) {
+  async initialize(
+    contentGeneratorConfig: ContentGeneratorConfig,
+    extraHistory?: Content[],
+  ) {
     this.contentGenerator = await createContentGenerator(
       contentGeneratorConfig,
       this.config,
       this.config.getSessionId(),
     );
-    this.chat = await this.startChat();
+    /**
+     * Always take the model from contentGeneratorConfig to initialize,
+     * despite the `this.config.contentGeneratorConfig` is not updated yet because in
+     * `Config` it will not be updated until the initialization is successful.
+     */
+    this.chat = await this.startChat(
+      extraHistory || [],
+      contentGeneratorConfig.model,
+    );
   }
 
   getContentGenerator(): ContentGenerator {
@@ -217,6 +228,28 @@ export class GeminiClient {
     this.chat = await this.startChat();
   }
 
+  /**
+   * Reinitializes the chat with the current contentGeneratorConfig while preserving chat history.
+   * This creates a new chat object using the existing history and updated configuration.
+   * Should be called when configuration changes (model, auth, etc.) to ensure consistency.
+   */
+  async reinitialize(): Promise<void> {
+    if (!this.chat) {
+      return;
+    }
+
+    // Preserve the current chat history (excluding environment context)
+    const currentHistory = this.getHistory();
+    // Remove the initial environment context (first 2 messages: user env + model acknowledgment)
+    const userHistory = currentHistory.slice(2);
+
+    // Get current content generator config and reinitialize with preserved history
+    const contentGeneratorConfig = this.config.getContentGeneratorConfig();
+    if (contentGeneratorConfig) {
+      await this.initialize(contentGeneratorConfig, userHistory);
+    }
+  }
+
   async addDirectoryContext(): Promise<void> {
     if (!this.chat) {
       return;
@@ -228,7 +261,10 @@ export class GeminiClient {
     });
   }
 
-  async startChat(extraHistory?: Content[]): Promise<GeminiChat> {
+  async startChat(
+    extraHistory?: Content[],
+    model?: string,
+  ): Promise<GeminiChat> {
     this.forceFullIdeContext = true;
     this.hasFailedCompressionAttempt = false;
     const envParts = await getEnvironmentContext(this.config);
@@ -248,9 +284,13 @@ export class GeminiClient {
     ];
     try {
       const userMemory = this.config.getUserMemory();
-      const systemInstruction = getCoreSystemPrompt(userMemory);
+      const systemInstruction = getCoreSystemPrompt(
+        userMemory,
+        {},
+        model || this.config.getModel(),
+      );
       const generateContentConfigWithThinking = isThinkingSupported(
-        this.config.getModel(),
+        model || this.config.getModel(),
       )
         ? {
             ...this.generateContentConfig,
@@ -490,7 +530,11 @@ export class GeminiClient {
       // Get all the content that would be sent in an API call
       const currentHistory = this.getChat().getHistory(true);
       const userMemory = this.config.getUserMemory();
-      const systemPrompt = getCoreSystemPrompt(userMemory);
+      const systemPrompt = getCoreSystemPrompt(
+        userMemory,
+        {},
+        this.config.getModel(),
+      );
       const environment = await getEnvironmentContext(this.config);
 
       // Create a mock request content to count total tokens
@@ -644,14 +688,18 @@ export class GeminiClient {
     model?: string,
     config: GenerateContentConfig = {},
   ): Promise<Record<string, unknown>> {
-    // Use current model from config instead of hardcoded Flash model
-    const modelToUse =
-      model || this.config.getModel() || DEFAULT_GEMINI_FLASH_MODEL;
+    /**
+     * TODO: ensure `model` consistency among GeminiClient, GeminiChat, and ContentGenerator
+     * `model` passed to generateContent is not respected as we always use contentGenerator
+     * We should ignore model for now because some calls use `DEFAULT_GEMINI_FLASH_MODEL`
+     * which is not available as `qwen3-coder-flash`
+     */
+    const modelToUse = this.config.getModel() || DEFAULT_GEMINI_FLASH_MODEL;
     try {
       const userMemory = this.config.getUserMemory();
       const finalSystemInstruction = config.systemInstruction
         ? getCustomSystemPrompt(config.systemInstruction, userMemory)
-        : getCoreSystemPrompt(userMemory);
+        : getCoreSystemPrompt(userMemory, {}, modelToUse);
 
       const requestConfig = {
         abortSignal,
@@ -742,7 +790,7 @@ export class GeminiClient {
       const userMemory = this.config.getUserMemory();
       const finalSystemInstruction = generationConfig.systemInstruction
         ? getCustomSystemPrompt(generationConfig.systemInstruction, userMemory)
-        : getCoreSystemPrompt(userMemory);
+        : getCoreSystemPrompt(userMemory, {}, this.config.getModel());
 
       const requestConfig: GenerateContentConfig = {
         abortSignal,

packages/core/src/core/prompts.test.ts

@@ -364,6 +364,120 @@ describe('URL matching with trailing slash compatibility', () => {
   });
 });
 
+describe('Model-specific tool call formats', () => {
+  beforeEach(() => {
+    vi.resetAllMocks();
+    vi.stubEnv('SANDBOX', undefined);
+  });
+
+  it('should use XML format for qwen3-coder model', () => {
+    vi.mocked(isGitRepository).mockReturnValue(false);
+    const prompt = getCoreSystemPrompt(undefined, undefined, 'qwen3-coder-7b');
+
+    // Should contain XML-style tool calls
+    expect(prompt).toContain('<tool_call>');
+    expect(prompt).toContain('<function=run_shell_command>');
+    expect(prompt).toContain('<parameter=command>');
+    expect(prompt).toContain('</function>');
+    expect(prompt).toContain('</tool_call>');
+
+    // Should NOT contain bracket-style tool calls
+    expect(prompt).not.toContain('[tool_call: run_shell_command for');
+
+    // Should NOT contain JSON-style tool calls
+    expect(prompt).not.toContain('{"name": "run_shell_command"');
+
+    expect(prompt).toMatchSnapshot();
+  });
+
+  it('should use JSON format for qwen-vl model', () => {
+    vi.mocked(isGitRepository).mockReturnValue(false);
+    const prompt = getCoreSystemPrompt(undefined, undefined, 'qwen-vl-max');
+
+    // Should contain JSON-style tool calls
+    expect(prompt).toContain('<tool_call>');
+    expect(prompt).toContain('{"name": "run_shell_command"');
+    expect(prompt).toContain('"arguments": {"command": "node server.js &"}');
+    expect(prompt).toContain('</tool_call>');
+
+    // Should NOT contain bracket-style tool calls
+    expect(prompt).not.toContain('[tool_call: run_shell_command for');
+
+    // Should NOT contain XML-style tool calls with parameters
+    expect(prompt).not.toContain('<function=run_shell_command>');
+    expect(prompt).not.toContain('<parameter=command>');
+
+    expect(prompt).toMatchSnapshot();
+  });
+
+  it('should use bracket format for generic models', () => {
+    vi.mocked(isGitRepository).mockReturnValue(false);
+    const prompt = getCoreSystemPrompt(undefined, undefined, 'gpt-4');
+
+    // Should contain bracket-style tool calls
+    expect(prompt).toContain('[tool_call: run_shell_command for');
+    expect(prompt).toContain('because it must run in the background]');
+
+    // Should NOT contain XML-style tool calls
+    expect(prompt).not.toContain('<function=run_shell_command>');
+    expect(prompt).not.toContain('<parameter=command>');
+
+    // Should NOT contain JSON-style tool calls
+    expect(prompt).not.toContain('{"name": "run_shell_command"');
+
+    expect(prompt).toMatchSnapshot();
+  });
+
+  it('should use bracket format when no model is specified', () => {
+    vi.mocked(isGitRepository).mockReturnValue(false);
+    const prompt = getCoreSystemPrompt();
+
+    // Should contain bracket-style tool calls (default behavior)
+    expect(prompt).toContain('[tool_call: run_shell_command for');
+    expect(prompt).toContain('because it must run in the background]');
+
+    // Should NOT contain XML or JSON formats
+    expect(prompt).not.toContain('<function=run_shell_command>');
+    expect(prompt).not.toContain('{"name": "run_shell_command"');
+
+    expect(prompt).toMatchSnapshot();
+  });
+
+  it('should preserve model-specific formats with user memory', () => {
+    vi.mocked(isGitRepository).mockReturnValue(false);
+    const userMemory = 'User prefers concise responses.';
+    const prompt = getCoreSystemPrompt(
+      userMemory,
+      undefined,
+      'qwen3-coder-14b',
+    );
+
+    // Should contain XML-style tool calls
+    expect(prompt).toContain('<tool_call>');
+    expect(prompt).toContain('<function=run_shell_command>');
+
+    // Should contain user memory with separator
+    expect(prompt).toContain('---');
+    expect(prompt).toContain('User prefers concise responses.');
+
+    expect(prompt).toMatchSnapshot();
+  });
+
+  it('should preserve model-specific formats with sandbox environment', () => {
+    vi.stubEnv('SANDBOX', 'true');
+    vi.mocked(isGitRepository).mockReturnValue(false);
+    const prompt = getCoreSystemPrompt(undefined, undefined, 'qwen-vl-plus');
+
+    // Should contain JSON-style tool calls
+    expect(prompt).toContain('{"name": "run_shell_command"');
+
+    // Should contain sandbox instructions
+    expect(prompt).toContain('# Sandbox');
+
+    expect(prompt).toMatchSnapshot();
+  });
+});
+
 describe('getCustomSystemPrompt', () => {
   it('should handle string custom instruction without user memory', () => {
     const customInstruction =

packages/core/src/core/prompts.ts

@@ -7,18 +7,10 @@
 import path from 'node:path';
 import fs from 'node:fs';
 import os from 'node:os';
-import { EditTool } from '../tools/edit.js';
-import { GlobTool } from '../tools/glob.js';
-import { GrepTool } from '../tools/grep.js';
-import { ReadFileTool } from '../tools/read-file.js';
-import { ReadManyFilesTool } from '../tools/read-many-files.js';
-import { ShellTool } from '../tools/shell.js';
-import { WriteFileTool } from '../tools/write-file.js';
+import { ToolNames } from '../tools/tool-names.js';
 import process from 'node:process';
 import { isGitRepository } from '../utils/gitUtils.js';
-import { MemoryTool, GEMINI_CONFIG_DIR } from '../tools/memoryTool.js';
-import { TodoWriteTool } from '../tools/todoWrite.js';
-import { TaskTool } from '../tools/task.js';
+import { GEMINI_CONFIG_DIR } from '../tools/memoryTool.js';
 import type { GenerateContentConfig } from '@google/genai';
 
 export interface ModelTemplateMapping {
@@ -91,6 +83,7 @@ export function getCustomSystemPrompt(
 export function getCoreSystemPrompt(
   userMemory?: string,
   config?: SystemPromptConfig,
+  model?: string,
 ): string {
   // if GEMINI_SYSTEM_MD is set (and not 0|false), override system prompt from file
   // default path is .gemini/system.md but can be modified via custom path in GEMINI_SYSTEM_MD
@@ -177,11 +170,11 @@ You are Qwen Code, an interactive CLI agent developed by Alibaba Group, speciali
 - **Proactiveness:** Fulfill the user's request thoroughly, including reasonable, directly implied follow-up actions.
 - **Confirm Ambiguity/Expansion:** Do not take significant actions beyond the clear scope of the request without confirming with the user. If asked *how* to do something, explain first, don't just do it.
 - **Explaining Changes:** After completing a code modification or file operation *do not* provide summaries unless asked.
-- **Path Construction:** Before using any file system tool (e.g., ${ReadFileTool.Name}' or '${WriteFileTool.Name}'), you must construct the full absolute path for the file_path argument. Always combine the absolute path of the project's root directory with the file's path relative to the root. For example, if the project root is /path/to/project/ and the file is foo/bar/baz.txt, the final path you must use is /path/to/project/foo/bar/baz.txt. If the user provides a relative path, you must resolve it against the root directory to create an absolute path.
+- **Path Construction:** Before using any file system tool (e.g., ${ToolNames.READ_FILE}' or '${ToolNames.WRITE_FILE}'), you must construct the full absolute path for the file_path argument. Always combine the absolute path of the project's root directory with the file's path relative to the root. For example, if the project root is /path/to/project/ and the file is foo/bar/baz.txt, the final path you must use is /path/to/project/foo/bar/baz.txt. If the user provides a relative path, you must resolve it against the root directory to create an absolute path.
 - **Do Not revert changes:** Do not revert changes to the codebase unless asked to do so by the user. Only revert changes made by you if they have resulted in an error or if the user has explicitly asked you to revert the changes.
 
 # Task Management
-You have access to the ${TodoWriteTool.Name} tool to help you manage and plan tasks. Use these tools VERY frequently to ensure that you are tracking your tasks and giving the user visibility into your progress.
+You have access to the ${ToolNames.TODO_WRITE} tool to help you manage and plan tasks. Use these tools VERY frequently to ensure that you are tracking your tasks and giving the user visibility into your progress.
 These tools are also EXTREMELY helpful for planning tasks, and for breaking down larger complex tasks into smaller steps. If you do not use this tool when planning, you may forget to do important tasks - and that is unacceptable.
 
 It is critical that you mark todos as completed as soon as you are done with a task. Do not batch up multiple tasks before marking them as completed.
@@ -190,13 +183,13 @@ Examples:
 
 <example>
 user: Run the build and fix any type errors
-assistant: I'm going to use the ${TodoWriteTool.Name} tool to write the following items to the todo list: 
+assistant: I'm going to use the ${ToolNames.TODO_WRITE} tool to write the following items to the todo list: 
 - Run the build
 - Fix any type errors
 
 I'm now going to run the build using Bash.
 
-Looks like I found 10 type errors. I'm going to use the ${TodoWriteTool.Name} tool to write 10 items to the todo list.
+Looks like I found 10 type errors. I'm going to use the ${ToolNames.TODO_WRITE} tool to write 10 items to the todo list.
 
 marking the first todo as in_progress
 
@@ -211,7 +204,7 @@ In the above example, the assistant completes all the tasks, including the 10 er
 <example>
 user: Help me write a new feature that allows users to track their usage metrics and export them to various formats
 
-A: I'll help you implement a usage metrics tracking and export feature. Let me first use the ${TodoWriteTool.Name} tool to plan this task.
+A: I'll help you implement a usage metrics tracking and export feature. Let me first use the ${ToolNames.TODO_WRITE} tool to plan this task.
 Adding the following todos to the todo list:
 1. Research existing metrics tracking in the codebase
 2. Design the metrics collection system
@@ -232,8 +225,8 @@ I've found some existing telemetry code. Let me mark the first todo as in_progre
 
 ## Software Engineering Tasks
 When requested to perform tasks like fixing bugs, adding features, refactoring, or explaining code, follow this iterative approach:
-- **Plan:** After understanding the user's request, create an initial plan based on your existing knowledge and any immediately obvious context. Use the '${TodoWriteTool.Name}' tool to capture this rough plan for complex or multi-step work. Don't wait for complete understanding - start with what you know.
-- **Implement:** Begin implementing the plan while gathering additional context as needed. Use '${GrepTool.Name}', '${GlobTool.Name}', '${ReadFileTool.Name}', and '${ReadManyFilesTool.Name}' tools strategically when you encounter specific unknowns during implementation. Use the available tools (e.g., '${EditTool.Name}', '${WriteFileTool.Name}' '${ShellTool.Name}' ...) to act on the plan, strictly adhering to the project's established conventions (detailed under 'Core Mandates').
+- **Plan:** After understanding the user's request, create an initial plan based on your existing knowledge and any immediately obvious context. Use the '${ToolNames.TODO_WRITE}' tool to capture this rough plan for complex or multi-step work. Don't wait for complete understanding - start with what you know.
+- **Implement:** Begin implementing the plan while gathering additional context as needed. Use '${ToolNames.GREP}', '${ToolNames.GLOB}', '${ToolNames.READ_FILE}', and '${ToolNames.READ_MANY_FILES}' tools strategically when you encounter specific unknowns during implementation. Use the available tools (e.g., '${ToolNames.EDIT}', '${ToolNames.WRITE_FILE}' '${ToolNames.SHELL}' ...) to act on the plan, strictly adhering to the project's established conventions (detailed under 'Core Mandates').
 - **Adapt:** As you discover new information or encounter obstacles, update your plan and todos accordingly. Mark todos as in_progress when starting and completed when finishing each task. Add new todos if the scope expands. Refine your approach based on what you learn.
 - **Verify (Tests):** If applicable and feasible, verify the changes using the project's testing procedures. Identify the correct test commands and frameworks by examining 'README' files, build/package configuration (e.g., 'package.json'), or existing test execution patterns. NEVER assume standard test commands.
 - **Verify (Standards):** VERY IMPORTANT: After making code changes, execute the project-specific build, linting and type-checking commands (e.g., 'tsc', 'npm run lint', 'ruff check .') that you have identified for this project (or obtained from the user). This ensures code quality and adherence to standards. If unsure about these commands, you can ask the user if they'd like you to run them and if so how to.
@@ -242,11 +235,11 @@ When requested to perform tasks like fixing bugs, adding features, refactoring,
 
 - Tool results and user messages may include <system-reminder> tags. <system-reminder> tags contain useful information and reminders. They are NOT part of the user's provided input or the tool result.
 
-IMPORTANT: Always use the ${TodoWriteTool.Name} tool to plan and track tasks throughout the conversation.
+IMPORTANT: Always use the ${ToolNames.TODO_WRITE} tool to plan and track tasks throughout the conversation.
 
 ## New Applications
 
-**Goal:** Autonomously implement and deliver a visually appealing, substantially complete, and functional prototype. Utilize all tools at your disposal to implement the application. Some tools you may especially find useful are '${WriteFileTool.Name}', '${EditTool.Name}' and '${ShellTool.Name}'.
+**Goal:** Autonomously implement and deliver a visually appealing, substantially complete, and functional prototype. Utilize all tools at your disposal to implement the application. Some tools you may especially find useful are '${ToolNames.WRITE_FILE}', '${ToolNames.EDIT}' and '${ToolNames.SHELL}'.
 
 1. **Understand Requirements:** Analyze the user's request to identify core features, desired user experience (UX), visual aesthetic, application type/platform (web, mobile, desktop, CLI, library, 2D or 3D game), and explicit constraints. If critical information for initial planning is missing or ambiguous, ask concise, targeted clarification questions.
 2. **Propose Plan:** Formulate an internal development plan. Present a clear, concise, high-level summary to the user. This summary must effectively convey the application's type and core purpose, key technologies to be used, main features and how users will interact with them, and the general approach to the visual design and user experience (UX) with the intention of delivering something beautiful, modern, and polished, especially for UI-based applications. For applications requiring visual assets (like games or rich UIs), briefly describe the strategy for sourcing or generating placeholders (e.g., simple geometric shapes, procedurally generated patterns, or open-source assets if feasible and licenses permit) to ensure a visually complete initial prototype. Ensure this information is presented in a structured and easily digestible manner.
@@ -259,7 +252,7 @@ IMPORTANT: Always use the ${TodoWriteTool.Name} tool to plan and track tasks thr
   - **3d Games:** HTML/CSS/JavaScript with Three.js.
   - **2d Games:** HTML/CSS/JavaScript.
 3. **User Approval:** Obtain user approval for the proposed plan.
-4. **Implementation:** Use the '${TodoWriteTool.Name}' tool to convert the approved plan into a structured todo list with specific, actionable tasks, then autonomously implement each task utilizing all available tools. When starting ensure you scaffold the application using '${ShellTool.Name}' for commands like 'npm init', 'npx create-react-app'. Aim for full scope completion. Proactively create or source necessary placeholder assets (e.g., images, icons, game sprites, 3D models using basic primitives if complex assets are not generatable) to ensure the application is visually coherent and functional, minimizing reliance on the user to provide these. If the model can generate simple assets (e.g., a uniformly colored square sprite, a simple 3D cube), it should do so. Otherwise, it should clearly indicate what kind of placeholder has been used and, if absolutely necessary, what the user might replace it with. Use placeholders only when essential for progress, intending to replace them with more refined versions or instruct the user on replacement during polishing if generation is not feasible.
+4. **Implementation:** Use the '${ToolNames.TODO_WRITE}' tool to convert the approved plan into a structured todo list with specific, actionable tasks, then autonomously implement each task utilizing all available tools. When starting ensure you scaffold the application using '${ToolNames.SHELL}' for commands like 'npm init', 'npx create-react-app'. Aim for full scope completion. Proactively create or source necessary placeholder assets (e.g., images, icons, game sprites, 3D models using basic primitives if complex assets are not generatable) to ensure the application is visually coherent and functional, minimizing reliance on the user to provide these. If the model can generate simple assets (e.g., a uniformly colored square sprite, a simple 3D cube), it should do so. Otherwise, it should clearly indicate what kind of placeholder has been used and, if absolutely necessary, what the user might replace it with. Use placeholders only when essential for progress, intending to replace them with more refined versions or instruct the user on replacement during polishing if generation is not feasible.
 5. **Verify:** Review work against the original request, the approved plan. Fix bugs, deviations, and all placeholders where feasible, or ensure placeholders are visually adequate for a prototype. Ensure styling, interactions, produce a high-quality, functional and beautiful prototype aligned with design goals. Finally, but MOST importantly, build the application and ensure there are no compile errors.
 6. **Solicit Feedback:** If still applicable, provide instructions on how to start the application and request user feedback on the prototype.
 
@@ -275,18 +268,18 @@ IMPORTANT: Always use the ${TodoWriteTool.Name} tool to plan and track tasks thr
 - **Handling Inability:** If unable/unwilling to fulfill a request, state so briefly (1-2 sentences) without excessive justification. Offer alternatives if appropriate.
 
 ## Security and Safety Rules
-- **Explain Critical Commands:** Before executing commands with '${ShellTool.Name}' that modify the file system, codebase, or system state, you *must* provide a brief explanation of the command's purpose and potential impact. Prioritize user understanding and safety. You should not ask permission to use the tool; the user will be presented with a confirmation dialogue upon use (you do not need to tell them this).
+- **Explain Critical Commands:** Before executing commands with '${ToolNames.SHELL}' that modify the file system, codebase, or system state, you *must* provide a brief explanation of the command's purpose and potential impact. Prioritize user understanding and safety. You should not ask permission to use the tool; the user will be presented with a confirmation dialogue upon use (you do not need to tell them this).
 - **Security First:** Always apply security best practices. Never introduce code that exposes, logs, or commits secrets, API keys, or other sensitive information.
 
 ## Tool Usage
-- **File Paths:** Always use absolute paths when referring to files with tools like '${ReadFileTool.Name}' or '${WriteFileTool.Name}'. Relative paths are not supported. You must provide an absolute path.
+- **File Paths:** Always use absolute paths when referring to files with tools like '${ToolNames.READ_FILE}' or '${ToolNames.WRITE_FILE}'. Relative paths are not supported. You must provide an absolute path.
 - **Parallelism:** Execute multiple independent tool calls in parallel when feasible (i.e. searching the codebase).
-- **Command Execution:** Use the '${ShellTool.Name}' tool for running shell commands, remembering the safety rule to explain modifying commands first.
+- **Command Execution:** Use the '${ToolNames.SHELL}' tool for running shell commands, remembering the safety rule to explain modifying commands first.
 - **Background Processes:** Use background processes (via \`&\`) for commands that are unlikely to stop on their own, e.g. \`node server.js &\`. If unsure, ask the user.
 - **Interactive Commands:** Try to avoid shell commands that are likely to require user interaction (e.g. \`git rebase -i\`). Use non-interactive versions of commands (e.g. \`npm init -y\` instead of \`npm init\`) when available, and otherwise remind the user that interactive shell commands are not supported and may cause hangs until canceled by the user.
-- **Task Management:** Use the '${TodoWriteTool.Name}' tool proactively for complex, multi-step tasks to track progress and provide visibility to users. This tool helps organize work systematically and ensures no requirements are missed.
-- **Subagent Delegation:** When doing file search, prefer to use the '${TaskTool.Name}' tool in order to reduce context usage. You should proactively use the '${TaskTool.Name}' tool with specialized agents when the task at hand matches the agent's description.
-- **Remembering Facts:** Use the '${MemoryTool.Name}' tool to remember specific, *user-related* facts or preferences when the user explicitly asks, or when they state a clear, concise piece of information that would help personalize or streamline *your future interactions with them* (e.g., preferred coding style, common project paths they use, personal tool aliases). This tool is for user-specific information that should persist across sessions. Do *not* use it for general project context or information. If unsure whether to save something, you can ask the user, "Should I remember that for you?"
+- **Task Management:** Use the '${ToolNames.TODO_WRITE}' tool proactively for complex, multi-step tasks to track progress and provide visibility to users. This tool helps organize work systematically and ensures no requirements are missed.
+- **Subagent Delegation:** When doing file search, prefer to use the '${ToolNames.TASK}' tool in order to reduce context usage. You should proactively use the '${ToolNames.TASK}' tool with specialized agents when the task at hand matches the agent's description.
+- **Remembering Facts:** Use the '${ToolNames.MEMORY}' tool to remember specific, *user-related* facts or preferences when the user explicitly asks, or when they state a clear, concise piece of information that would help personalize or streamline *your future interactions with them* (e.g., preferred coding style, common project paths they use, personal tool aliases). This tool is for user-specific information that should persist across sessions. Do *not* use it for general project context or information. If unsure whether to save something, you can ask the user, "Should I remember that for you?"
 - **Respect User Confirmations:** Most tool calls (also denoted as 'function calls') will first require confirmation from the user, where they will either approve or cancel the function call. If a user cancels a function call, respect their choice and do _not_ try to make the function call again. It is okay to request the tool call again _only_ if the user requests that same tool call on a subsequent prompt. When a user cancels a function call, assume best intentions from the user and consider inquiring if they prefer any alternative paths forward.
 
 ## Interaction Details
@@ -338,157 +331,10 @@ ${(function () {
   return '';
 })()}
 
-# Examples (Illustrating Tone and Workflow)
-<example>
-user: 1 + 2
-model: 3
-</example>
-
-<example>
-user: is 13 a prime number?
-model: true
-</example>
-
-<example>
-user: start the server implemented in server.js
-model: 
-<tool_call>
-<function=run_shell_command>
-<parameter=command>
-node server.js &
-</parameter>
-</function>
-</tool_call>
-</example>
-
-<example>
-user: Refactor the auth logic in src/auth.py to use the requests library instead of urllib.
-model: Okay, I can refactor 'src/auth.py'.
-First, I'll analyze the code and check for a test safety net before planning any changes.
-<tool_call>
-<function=glob>
-<parameter=path>
-tests/test_auth.py
-</parameter>
-</function>
-</tool_call>
-<tool_call>
-<function=read_file>
-<parameter=path>
-/path/to/tests/test_auth.py
-</parameter>
-<parameter=offset>
-0
-</parameter>
-<parameter=limit>
-10
-</parameter>
-</function>
-</tool_call>
-(After analysis)
-Great, 'tests/test_auth.py' exists and covers the core authentication logic. With this safety net in place, I can safely plan the refactoring.
-I'll also confirm 'requests' is a dependency.
-<tool_call>
-<function=read_file>
-<parameter=path>
-/path/to/requirements.txt
-</parameter>
-</function>
-</tool_call>
-(After analysis)
-Looks good, 'requests' is available.
-
-Here's the plan:
-1.  Replace the 'urllib' calls with 'requests'.
-2.  Add proper 'try...except' error handling for the new network calls.
-3.  Remove the old 'urllib' import.
-4.  Run the project's linter and tests to verify the changes.
-
-<tool_call>
-<function=replace>
-<parameter=path>
-src/auth.py
-</parameter>
-<parameter=old_content>
-(old code content)
-</parameter>
-<parameter=new_content>
-(new code content)
-</parameter>
-</function>
-</tool_call>
-Refactoring complete. Running verification...
-<tool_call>
-<function=run_shell_command
-<parameter=command>
-ruff check src/auth.py && pytest
-</parameter>
-</function>
-</tool_call>
-(After verification passes)
-All checks passed. This is a stable checkpoint.
-Would you like me to write a commit message and commit these changes?
-</example>
-
-<example>
-user: Delete the temp directory.
-model: I can run \`rm -rf /path/to/project/temp\`. This will permanently delete the directory and all its contents.
-</example>
-
-<example>
-user: Write tests for someFile.ts
-model:
-Okay, I can write those tests. First, I'll read someFile.ts to understand its functionality.
-<tool_call>
-<function=read_file>
-<parameter=path>
-/path/to/someFile.ts
-</parameter>
-</function>
-</tool_call>
-Now I'll look for existing or related test files to understand current testing conventions and dependencies.
-<tool_call>
-<function>read_many_files for paths ['**/*.test.ts', 'src/**/*.spec.ts'] assuming someFile.ts is in the src directory]
-</tool_call>
-(After reviewing existing tests and the file content)
-<tool_call>
-<function=write_file>
-<parameter=path>
-/path/to/someFile.test.ts
-</parameter>
-</function>
-</tool_call>
-I've written the tests. Now I'll run the project's test command to verify them.
-<tool_call>
-<function=run_shell_command>
-<parameter=command>
-npm run test
-</parameter>
-</function>
-</tool_call>
-(After verification passes)
-All checks passed. This is a stable checkpoint.
-</example>
-
-<example>
-user: Where are all the 'app.config' files in this project? I need to check their settings.
-model:
-<tool_call>
-<function=glob>
-<parameter=pattern>
-./**/app.config
-</parameter>
-</function>
-</tool_call>
-(Assuming GlobTool returns a list of paths like ['/path/to/moduleA/app.config', '/path/to/moduleB/app.config'])
-I found the following 'app.config' files:
-- /path/to/moduleA/app.config
-- /path/to/moduleB/app.config
-To help you check their settings, I can read their contents. Which one would you like to start with, or should I read all of them?
-</example>
+${getToolCallExamples(model || '')}
 
 # Final Reminder
-Your core function is efficient and safe assistance. Balance extreme conciseness with the crucial need for clarity, especially regarding safety and potential system modifications. Always prioritize user control and project conventions. Never make assumptions about the contents of files; instead use '${ReadFileTool.Name}' or '${ReadManyFilesTool.Name}' to ensure you aren't making broad assumptions. Finally, you are an agent - please keep going until the user's query is completely resolved.
+Your core function is efficient and safe assistance. Balance extreme conciseness with the crucial need for clarity, especially regarding safety and potential system modifications. Always prioritize user control and project conventions. Never make assumptions about the contents of files; instead use '${ToolNames.READ_FILE}' or '${ToolNames.READ_MANY_FILES}' to ensure you aren't making broad assumptions. Finally, you are an agent - please keep going until the user's query is completely resolved.
 `.trim();
 
   // if GEMINI_WRITE_SYSTEM_MD is set (and not 0|false), write base system prompt to file
@@ -615,3 +461,366 @@ You are a specialized context summarizer that creates a comprehensive markdown s
 
 `.trim();
 }
+
+const generalToolCallExamples = `
+# Examples (Illustrating Tone and Workflow)
+<example>
+user: 1 + 2
+model: 3
+</example>
+
+<example>
+user: is 13 a prime number?
+model: true
+</example>
+
+<example>
+user: start the server implemented in server.js
+model: [tool_call: ${ToolNames.SHELL} for 'node server.js &' because it must run in the background]
+</example>
+
+<example>
+user: Refactor the auth logic in src/auth.py to use the requests library instead of urllib.
+model: Okay, I can refactor 'src/auth.py'.
+First, I'll analyze the code and check for a test safety net before planning any changes.
+[tool_call: ${ToolNames.GLOB} for path 'tests/test_auth.py']
+[tool_call: ${ToolNames.READ_FILE} for path '/path/to/tests/test_auth.py' with offset 0 and limit 10]
+(After analysis)
+Great, 'tests/test_auth.py' exists and covers the core authentication logic. With this safety net in place, I can safely plan the refactoring.
+I'll also confirm 'requests' is a dependency.
+[tool_call: ${ToolNames.READ_FILE} for path '/path/to/requirements.txt']
+(After analysis)
+Looks good, 'requests' is available.
+
+Here's the plan:
+1.  Replace the 'urllib' calls with 'requests'.
+2.  Add proper 'try...except' error handling for the new network calls.
+3.  Remove the old 'urllib' import.
+4.  Run the project's linter and tests to verify the changes.
+
+[tool_call: ${ToolNames.EDIT} for path 'src/auth.py' replacing old content with new content]
+Refactoring complete. Running verification...
+[tool_call: ${ToolNames.SHELL} for 'ruff check src/auth.py && pytest']
+(After verification passes)
+All checks passed. This is a stable checkpoint.
+Would you like me to write a commit message and commit these changes?
+</example>
+
+<example>
+user: Delete the temp directory.
+model: I can run \`rm -rf /path/to/project/temp\`. This will permanently delete the directory and all its contents.
+</example>
+
+<example>
+user: Write tests for someFile.ts
+model:
+Okay, I can write those tests. First, I'll read someFile.ts to understand its functionality.
+[tool_call: ${ToolNames.READ_FILE} for path '/path/to/someFile.ts']
+Now I'll look for existing or related test files to understand current testing conventions and dependencies.
+[tool_call: ${ToolNames.READ_MANY_FILES} for paths ['**/*.test.ts', 'src/**/*.spec.ts']]
+(After reviewing existing tests and the file content)
+[tool_call: ${ToolNames.WRITE_FILE} for path '/path/to/someFile.test.ts']
+I've written the tests. Now I'll run the project's test command to verify them.
+[tool_call: ${ToolNames.SHELL} for 'npm run test']
+(After verification passes)
+All checks passed. This is a stable checkpoint.
+</example>
+
+<example>
+user: Where are all the 'app.config' files in this project? I need to check their settings.
+model:
+[tool_call: ${ToolNames.GLOB} for pattern './**/app.config']
+(Assuming GlobTool returns a list of paths like ['/path/to/moduleA/app.config', '/path/to/moduleB/app.config'])
+I found the following 'app.config' files:
+- /path/to/moduleA/app.config
+- /path/to/moduleB/app.config
+To help you check their settings, I can read their contents. Which one would you like to start with, or should I read all of them?
+</example>
+`.trim();
+
+const qwenCoderToolCallExamples = `
+# Examples (Illustrating Tone and Workflow)
+<example>
+user: 1 + 2
+model: 3
+</example>
+
+<example>
+user: is 13 a prime number?
+model: true
+</example>
+
+<example>
+user: start the server implemented in server.js
+model: 
+<tool_call>
+<function=${ToolNames.SHELL}>
+<parameter=command>
+node server.js &
+</parameter>
+</function>
+</tool_call>
+</example>
+
+<example>
+user: Refactor the auth logic in src/auth.py to use the requests library instead of urllib.
+model: Okay, I can refactor 'src/auth.py'.
+First, I'll analyze the code and check for a test safety net before planning any changes.
+<tool_call>
+<function=${ToolNames.GLOB}>
+<parameter=path>
+tests/test_auth.py
+</parameter>
+</function>
+</tool_call>
+<tool_call>
+<function=${ToolNames.READ_FILE}>
+<parameter=path>
+/path/to/tests/test_auth.py
+</parameter>
+<parameter=offset>
+0
+</parameter>
+<parameter=limit>
+10
+</parameter>
+</function>
+</tool_call>
+(After analysis)
+Great, 'tests/test_auth.py' exists and covers the core authentication logic. With this safety net in place, I can safely plan the refactoring.
+I'll also confirm 'requests' is a dependency.
+<tool_call>
+<function=${ToolNames.READ_FILE}>
+<parameter=path>
+/path/to/requirements.txt
+</parameter>
+</function>
+</tool_call>
+(After analysis)
+Looks good, 'requests' is available.
+
+Here's the plan:
+1.  Replace the 'urllib' calls with 'requests'.
+2.  Add proper 'try...except' error handling for the new network calls.
+3.  Remove the old 'urllib' import.
+4.  Run the project's linter and tests to verify the changes.
+
+<tool_call>
+<function=${ToolNames.EDIT}>
+<parameter=path>
+src/auth.py
+</parameter>
+<parameter=old_content>
+(old code content)
+</parameter>
+<parameter=new_content>
+(new code content)
+</parameter>
+</function>
+</tool_call>
+Refactoring complete. Running verification...
+<tool_call>
+<function=${ToolNames.SHELL}>
+<parameter=command>
+ruff check src/auth.py && pytest
+</parameter>
+</function>
+</tool_call>
+(After verification passes)
+All checks passed. This is a stable checkpoint.
+Would you like me to write a commit message and commit these changes?
+</example>
+
+<example>
+user: Delete the temp directory.
+model: I can run \`rm -rf /path/to/project/temp\`. This will permanently delete the directory and all its contents.
+</example>
+
+<example>
+user: Write tests for someFile.ts
+model:
+Okay, I can write those tests. First, I'll read someFile.ts to understand its functionality.
+<tool_call>
+<function=${ToolNames.READ_FILE}>
+<parameter=path>
+/path/to/someFile.ts
+</parameter>
+</function>
+</tool_call>
+Now I'll look for existing or related test files to understand current testing conventions and dependencies.
+<tool_call>
+<function=${ToolNames.READ_MANY_FILES}>
+<parameter=paths>
+['**/*.test.ts', 'src/**/*.spec.ts']
+</parameter>
+</function>
+</tool_call>
+(After reviewing existing tests and the file content)
+<tool_call>
+<function=${ToolNames.WRITE_FILE}>
+<parameter=path>
+/path/to/someFile.test.ts
+</parameter>
+</function>
+</tool_call>
+I've written the tests. Now I'll run the project's test command to verify them.
+<tool_call>
+<function=${ToolNames.SHELL}>
+<parameter=command>
+npm run test
+</parameter>
+</function>
+</tool_call>
+(After verification passes)
+All checks passed. This is a stable checkpoint.
+</example>
+
+<example>
+user: Where are all the 'app.config' files in this project? I need to check their settings.
+model:
+<tool_call>
+<function=${ToolNames.GLOB}>
+<parameter=pattern>
+./**/app.config
+</parameter>
+</function>
+</tool_call>
+(Assuming GlobTool returns a list of paths like ['/path/to/moduleA/app.config', '/path/to/moduleB/app.config'])
+I found the following 'app.config' files:
+- /path/to/moduleA/app.config
+- /path/to/moduleB/app.config
+To help you check their settings, I can read their contents. Which one would you like to start with, or should I read all of them?
+</example>
+`.trim();
+const qwenVlToolCallExamples = `
+# Examples (Illustrating Tone and Workflow)
+<example>
+user: 1 + 2
+model: 3
+</example>
+
+<example>
+user: is 13 a prime number?
+model: true
+</example>
+
+<example>
+user: start the server implemented in server.js
+model: 
+<tool_call>
+{"name": "${ToolNames.SHELL}", "arguments": {"command": "node server.js &"}}
+</tool_call>
+</example>
+
+<example>
+user: Refactor the auth logic in src/auth.py to use the requests library instead of urllib.
+model: Okay, I can refactor 'src/auth.py'.
+First, I'll analyze the code and check for a test safety net before planning any changes.
+<tool_call>
+{"name": "${ToolNames.GLOB}", "arguments": {"path": "tests/test_auth.py"}}
+</tool_call>
+<tool_call>
+{"name": "${ToolNames.READ_FILE}", "arguments": {"path": "/path/to/tests/test_auth.py", "offset": 0, "limit": 10}}
+</tool_call>
+(After analysis)
+Great, 'tests/test_auth.py' exists and covers the core authentication logic. With this safety net in place, I can safely plan the refactoring.
+I'll also confirm 'requests' is a dependency.
+<tool_call>
+{"name": "${ToolNames.READ_FILE}", "arguments": {"path": "/path/to/requirements.txt"}}
+</tool_call>
+(After analysis)
+Looks good, 'requests' is available.
+
+Here's the plan:
+1.  Replace the 'urllib' calls with 'requests'.
+2.  Add proper 'try...except' error handling for the new network calls.
+3.  Remove the old 'urllib' import.
+4.  Run the project's linter and tests to verify the changes.
+
+<tool_call>
+{"name": "${ToolNames.EDIT}", "arguments": {"path": "src/auth.py", "old_content": "(old code content)", "new_content": "(new code content)"}}
+</tool_call>
+Refactoring complete. Running verification...
+<tool_call>
+{"name": "${ToolNames.SHELL}", "arguments": {"command": "ruff check src/auth.py && pytest"}}
+</tool_call>
+(After verification passes)
+All checks passed. This is a stable checkpoint.
+Would you like me to write a commit message and commit these changes?
+</example>
+
+<example>
+user: Delete the temp directory.
+model: I can run \`rm -rf /path/to/project/temp\`. This will permanently delete the directory and all its contents.
+</example>
+
+<example>
+user: Write tests for someFile.ts
+model:
+Okay, I can write those tests. First, I'll read someFile.ts to understand its functionality.
+<tool_call>
+{"name": "${ToolNames.READ_FILE}", "arguments": {"path": "/path/to/someFile.ts"}}
+</tool_call>
+Now I'll look for existing or related test files to understand current testing conventions and dependencies.
+<tool_call>
+{"name": "${ToolNames.READ_MANY_FILES}", "arguments": {"paths": ["**/*.test.ts", "src/**/*.spec.ts"]}}
+</tool_call>
+(After reviewing existing tests and the file content)
+<tool_call>
+{"name": "${ToolNames.WRITE_FILE}", "arguments": {"path": "/path/to/someFile.test.ts"}}
+</tool_call>
+I've written the tests. Now I'll run the project's test command to verify them.
+<tool_call>
+{"name": "${ToolNames.SHELL}", "arguments": {"command": "npm run test"}}
+</tool_call>
+(After verification passes)
+All checks passed. This is a stable checkpoint.
+</example>
+
+<example>
+user: Where are all the 'app.config' files in this project? I need to check their settings.
+model:
+<tool_call>
+{"name": "${ToolNames.GLOB}", "arguments": {"pattern": "./**/app.config"}}
+</tool_call>
+(Assuming GlobTool returns a list of paths like ['/path/to/moduleA/app.config', '/path/to/moduleB/app.config'])
+I found the following 'app.config' files:
+- /path/to/moduleA/app.config
+- /path/to/moduleB/app.config
+To help you check their settings, I can read their contents. Which one would you like to start with, or should I read all of them?
+</example>
+`.trim();
+
+function getToolCallExamples(model?: string): string {
+  // Check for environment variable override first
+  const toolCallStyle = process.env['QWEN_CODE_TOOL_CALL_STYLE'];
+  if (toolCallStyle) {
+    switch (toolCallStyle.toLowerCase()) {
+      case 'qwen-coder':
+        return qwenCoderToolCallExamples;
+      case 'qwen-vl':
+        return qwenVlToolCallExamples;
+      case 'general':
+        return generalToolCallExamples;
+      default:
+        console.warn(
+          `Unknown QWEN_CODE_TOOL_CALL_STYLE value: ${toolCallStyle}. Using model-based detection.`,
+        );
+        break;
+    }
+  }
+
+  // Enhanced regex-based model detection
+  if (model && model.length < 100) {
+    // Match qwen*-coder patterns (e.g., qwen3-coder, qwen2.5-coder, qwen-coder)
+    if (/qwen[^-]*-coder/i.test(model)) {
+      return qwenCoderToolCallExamples;
+    }
+    // Match qwen*-vl patterns (e.g., qwen-vl, qwen2-vl, qwen3-vl)
+    if (/qwen[^-]*-vl/i.test(model)) {
+      return qwenVlToolCallExamples;
+    }
+  }
+
+  return generalToolCallExamples;
+}

packages/core/src/subagents/subagent.test.ts

@@ -23,7 +23,11 @@ import {
 } from 'vitest';
 import { Config, type ConfigParameters } from '../config/config.js';
 import { DEFAULT_GEMINI_MODEL } from '../config/models.js';
-import { createContentGenerator } from '../core/contentGenerator.js';
+import {
+  createContentGenerator,
+  createContentGeneratorConfig,
+  AuthType,
+} from '../core/contentGenerator.js';
 import { GeminiChat } from '../core/geminiChat.js';
 import { executeToolCall } from '../core/nonInteractiveToolExecutor.js';
 import type { ToolRegistry } from '../tools/tool-registry.js';
@@ -56,8 +60,7 @@ async function createMockConfig(
   };
   const config = new Config(configParams);
   await config.initialize();
-  // eslint-disable-next-line @typescript-eslint/no-explicit-any
-  await config.refreshAuth('test-auth' as any);
+  await config.refreshAuth(AuthType.USE_GEMINI);
 
   // Mock ToolRegistry
   const mockToolRegistry = {
@@ -164,6 +167,10 @@ describe('subagent.ts', () => {
         getGenerativeModel: vi.fn(),
         // eslint-disable-next-line @typescript-eslint/no-explicit-any
       } as any);
+      vi.mocked(createContentGeneratorConfig).mockReturnValue({
+        model: DEFAULT_GEMINI_MODEL,
+        authType: undefined,
+      });
 
       mockSendMessageStream = vi.fn();
       // We mock the implementation of the constructor.

packages/core/src/tools/edit.ts

@@ -24,6 +24,7 @@ import { ApprovalMode } from '../config/config.js';
 import { ensureCorrectEdit } from '../utils/editCorrector.js';
 import { DEFAULT_DIFF_OPTIONS, getDiffStat } from './diffOptions.js';
 import { ReadFileTool } from './read-file.js';
+import { ToolNames } from './tool-names.js';
 import type {
   ModifiableDeclarativeTool,
   ModifyContext,
@@ -461,7 +462,7 @@ export class EditTool
   extends BaseDeclarativeTool<EditToolParams, ToolResult>
   implements ModifiableDeclarativeTool<EditToolParams>
 {
-  static readonly Name = 'edit';
+  static readonly Name = ToolNames.EDIT;
   constructor(private readonly config: Config) {
     super(
       EditTool.Name,

packages/core/src/tools/glob.ts

@@ -9,6 +9,7 @@ import path from 'node:path';
 import { glob, escape } from 'glob';
 import type { ToolInvocation, ToolResult } from './tools.js';
 import { BaseDeclarativeTool, BaseToolInvocation, Kind } from './tools.js';
+import { ToolNames } from './tool-names.js';
 import { shortenPath, makeRelative } from '../utils/paths.js';
 import type { Config } from '../config/config.js';
 import { ToolErrorType } from './tool-error.js';
@@ -252,7 +253,7 @@ class GlobToolInvocation extends BaseToolInvocation<
  * Implementation of the Glob tool logic
  */
 export class GlobTool extends BaseDeclarativeTool<GlobToolParams, ToolResult> {
-  static readonly Name = 'glob';
+  static readonly Name = ToolNames.GLOB;
 
   constructor(private config: Config) {
     super(

packages/core/src/tools/grep.ts

@@ -12,6 +12,7 @@ import { spawn } from 'node:child_process';
 import { globStream } from 'glob';
 import type { ToolInvocation, ToolResult } from './tools.js';
 import { BaseDeclarativeTool, BaseToolInvocation, Kind } from './tools.js';
+import { ToolNames } from './tool-names.js';
 import { makeRelative, shortenPath } from '../utils/paths.js';
 import { getErrorMessage, isNodeError } from '../utils/errors.js';
 import { isGitRepository } from '../utils/gitUtils.js';
@@ -597,7 +598,7 @@ class GrepToolInvocation extends BaseToolInvocation<
  * Implementation of the Grep tool logic (moved from CLI)
  */
 export class GrepTool extends BaseDeclarativeTool<GrepToolParams, ToolResult> {
-  static readonly Name = 'search_file_content'; // Keep static name
+  static readonly Name = ToolNames.GREP;
 
   constructor(private readonly config: Config) {
     super(

packages/core/src/tools/read-file.ts

@@ -8,6 +8,7 @@ import path from 'node:path';
 import { makeRelative, shortenPath } from '../utils/paths.js';
 import type { ToolInvocation, ToolLocation, ToolResult } from './tools.js';
 import { BaseDeclarativeTool, BaseToolInvocation, Kind } from './tools.js';
+import { ToolNames } from './tool-names.js';
 
 import type { PartUnion } from '@google/genai';
 import {
@@ -136,7 +137,7 @@ export class ReadFileTool extends BaseDeclarativeTool<
   ReadFileToolParams,
   ToolResult
 > {
-  static readonly Name: string = 'read_file';
+  static readonly Name: string = ToolNames.READ_FILE;
 
   constructor(private config: Config) {
     super(

packages/core/src/tools/read-many-files.ts

@@ -6,6 +6,7 @@
 
 import type { ToolInvocation, ToolResult } from './tools.js';
 import { BaseDeclarativeTool, BaseToolInvocation, Kind } from './tools.js';
+import { ToolNames } from './tool-names.js';
 import { getErrorMessage } from '../utils/errors.js';
 import * as fs from 'node:fs';
 import * as path from 'node:path';
@@ -526,7 +527,7 @@ export class ReadManyFilesTool extends BaseDeclarativeTool<
   ReadManyFilesParams,
   ToolResult
 > {
-  static readonly Name: string = 'read_many_files';
+  static readonly Name: string = ToolNames.READ_MANY_FILES;
 
   constructor(private config: Config) {
     const parameterSchema = {

packages/core/src/tools/shell.ts

@@ -9,6 +9,7 @@ import path from 'node:path';
 import os, { EOL } from 'node:os';
 import crypto from 'node:crypto';
 import type { Config } from '../config/config.js';
+import { ToolNames } from './tool-names.js';
 import { ToolErrorType } from './tool-error.js';
 import type {
   ToolInvocation,
@@ -403,7 +404,7 @@ export class ShellTool extends BaseDeclarativeTool<
   ShellToolParams,
   ToolResult
 > {
-  static Name: string = 'run_shell_command';
+  static Name: string = ToolNames.SHELL;
   private allowlist: Set<string> = new Set();
 
   constructor(private readonly config: Config) {

packages/core/src/tools/task.ts

@@ -5,6 +5,7 @@
  */
 
 import { BaseDeclarativeTool, BaseToolInvocation, Kind } from './tools.js';
+import { ToolNames } from './tool-names.js';
 import type {
   ToolResult,
   ToolResultDisplay,
@@ -46,7 +47,7 @@ export interface TaskParams {
  * for the model to choose from.
  */
 export class TaskTool extends BaseDeclarativeTool<TaskParams, ToolResult> {
-  static readonly Name: string = 'task';
+  static readonly Name: string = ToolNames.TASK;
 
   private subagentManager: SubagentManager;
   private availableSubagents: SubagentConfig[] = [];

packages/core/src/tools/tool-names.ts

@@ -0,0 +1,23 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/**
+ * Tool name constants to avoid circular dependencies.
+ * These constants are used across multiple files and should be kept in sync
+ * with the actual tool class names.
+ */
+export const ToolNames = {
+  EDIT: 'edit',
+  WRITE_FILE: 'write_file',
+  READ_FILE: 'read_file',
+  READ_MANY_FILES: 'read_many_files',
+  GREP: 'search_file_content',
+  GLOB: 'glob',
+  SHELL: 'run_shell_command',
+  TODO_WRITE: 'todo_write',
+  MEMORY: 'save_memory',
+  TASK: 'task',
+} as const;

packages/core/src/tools/write-file.ts

@@ -31,6 +31,7 @@ import {
   ensureCorrectFileContent,
 } from '../utils/editCorrector.js';
 import { DEFAULT_DIFF_OPTIONS, getDiffStat } from './diffOptions.js';
+import { ToolNames } from './tool-names.js';
 import type {
   ModifiableDeclarativeTool,
   ModifyContext,
@@ -403,7 +404,7 @@ export class WriteFileTool
   extends BaseDeclarativeTool<WriteFileToolParams, ToolResult>
   implements ModifiableDeclarativeTool<WriteFileToolParams>
 {
-  static readonly Name: string = 'write_file';
+  static readonly Name: string = ToolNames.WRITE_FILE;
 
   constructor(private readonly config: Config) {
     super(

packages/core/src/utils/editCorrector.ts

@@ -7,11 +7,7 @@
 import type { Content, GenerateContentConfig } from '@google/genai';
 import type { GeminiClient } from '../core/client.js';
 import type { EditToolParams } from '../tools/edit.js';
-import { EditTool } from '../tools/edit.js';
-import { WriteFileTool } from '../tools/write-file.js';
-import { ReadFileTool } from '../tools/read-file.js';
-import { ReadManyFilesTool } from '../tools/read-many-files.js';
-import { GrepTool } from '../tools/grep.js';
+import { ToolNames } from '../tools/tool-names.js';
 import { LruCache } from './LruCache.js';
 import { DEFAULT_QWEN_FLASH_MODEL } from '../config/models.js';
 import {
@@ -85,14 +81,14 @@ async function findLastEditTimestamp(
   const history = (await client.getHistory()) ?? [];
 
   // Tools that may reference the file path in their FunctionResponse `output`.
-  const toolsInResp = new Set([
-    WriteFileTool.Name,
-    EditTool.Name,
-    ReadManyFilesTool.Name,
-    GrepTool.Name,
+  const toolsInResp = new Set<string>([
+    ToolNames.WRITE_FILE,
+    ToolNames.EDIT,
+    ToolNames.READ_MANY_FILES,
+    ToolNames.GREP,
   ]);
   // Tools that may reference the file path in their FunctionCall `args`.
-  const toolsInCall = new Set([...toolsInResp, ReadFileTool.Name]);
+  const toolsInCall = new Set<string>([...toolsInResp, ToolNames.READ_FILE]);
 
   // Iterate backwards to find the most recent relevant action.
   for (const entry of history.slice().reverse()) {