feat: add configurable MCP tool loading to reduce LLM context usage (#1181)

Co-authored-by: Ralph Khreish <35776126+Crunchyman-ralph@users.noreply.github.com>
This commit is contained in:
Karol Fabjańczuk
2025-10-14 20:01:21 +02:00
committed by GitHub
parent 474a86cebb
commit a69d8c91dc
11 changed files with 1273 additions and 101 deletions

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@@ -0,0 +1,35 @@
---
"task-master-ai": minor
---
Add configurable MCP tool loading to optimize LLM context usage
You can now control which Task Master MCP tools are loaded by setting the `TASK_MASTER_TOOLS` environment variable in your MCP configuration. This helps reduce context usage for LLMs by only loading the tools you need.
**Configuration Options:**
- `all` (default): Load all 36 tools
- `core` or `lean`: Load only 7 essential tools for daily development
- Includes: `get_tasks`, `next_task`, `get_task`, `set_task_status`, `update_subtask`, `parse_prd`, `expand_task`
- `standard`: Load 15 commonly used tools (all core tools plus 8 more)
- Additional tools: `initialize_project`, `analyze_project_complexity`, `expand_all`, `add_subtask`, `remove_task`, `generate`, `add_task`, `complexity_report`
- Custom list: Comma-separated tool names (e.g., `get_tasks,next_task,set_task_status`)
**Example .mcp.json configuration:**
```json
{
"mcpServers": {
"task-master-ai": {
"command": "npx",
"args": ["-y", "task-master-ai"],
"env": {
"TASK_MASTER_TOOLS": "standard",
"ANTHROPIC_API_KEY": "your_key_here"
}
}
}
}
```
For complete details on all available tools, configuration examples, and usage guidelines, see the [MCP Tools documentation](https://docs.task-master.dev/capabilities/mcp#configurable-tool-loading).

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@@ -119,6 +119,7 @@ MCP (Model Control Protocol) lets you run Task Master directly from your editor.
"command": "npx",
"args": ["-y", "task-master-ai"],
"env": {
// "TASK_MASTER_TOOLS": "all", // Options: "all", "standard", "core", or comma-separated list of tools
"ANTHROPIC_API_KEY": "YOUR_ANTHROPIC_API_KEY_HERE",
"PERPLEXITY_API_KEY": "YOUR_PERPLEXITY_API_KEY_HERE",
"OPENAI_API_KEY": "YOUR_OPENAI_KEY_HERE",
@@ -148,6 +149,7 @@ MCP (Model Control Protocol) lets you run Task Master directly from your editor.
"command": "npx",
"args": ["-y", "task-master-ai"],
"env": {
// "TASK_MASTER_TOOLS": "all", // Options: "all", "standard", "core", or comma-separated list of tools
"ANTHROPIC_API_KEY": "YOUR_ANTHROPIC_API_KEY_HERE",
"PERPLEXITY_API_KEY": "YOUR_PERPLEXITY_API_KEY_HERE",
"OPENAI_API_KEY": "YOUR_OPENAI_KEY_HERE",
@@ -196,7 +198,7 @@ Initialize taskmaster-ai in my project
#### 5. Make sure you have a PRD (Recommended)
For **new projects**: Create your PRD at `.taskmaster/docs/prd.txt`
For **new projects**: Create your PRD at `.taskmaster/docs/prd.txt`.
For **existing projects**: You can use `scripts/prd.txt` or migrate with `task-master migrate`
An example PRD template is available after initialization in `.taskmaster/templates/example_prd.txt`.
@@ -282,6 +284,76 @@ task-master generate
task-master rules add windsurf,roo,vscode
```
## Tool Loading Configuration
### Optimizing MCP Tool Loading
Task Master's MCP server supports selective tool loading to reduce context window usage. By default, all 36 tools are loaded (~21,000 tokens) to maintain backward compatibility with existing installations.
You can optimize performance by configuring the `TASK_MASTER_TOOLS` environment variable:
### Available Modes
| Mode | Tools | Context Usage | Use Case |
|------|-------|--------------|----------|
| `all` (default) | 36 | ~21,000 tokens | Complete feature set - all tools available |
| `standard` | 15 | ~10,000 tokens | Common task management operations |
| `core` (or `lean`) | 7 | ~5,000 tokens | Essential daily development workflow |
| `custom` | Variable | Variable | Comma-separated list of specific tools |
### Configuration Methods
#### Method 1: Environment Variable in MCP Configuration
Add `TASK_MASTER_TOOLS` to your MCP configuration file's `env` section:
```jsonc
{
"mcpServers": { // or "servers" for VS Code
"task-master-ai": {
"command": "npx",
"args": ["-y", "--package=task-master-ai", "task-master-ai"],
"env": {
"TASK_MASTER_TOOLS": "standard", // Options: "all", "standard", "core", "lean", or comma-separated list
"ANTHROPIC_API_KEY": "your-key-here",
// ... other API keys
}
}
}
}
```
#### Method 2: Claude Code CLI (One-Time Setup)
For Claude Code users, you can set the mode during installation:
```bash
# Core mode example (~70% token reduction)
claude mcp add task-master-ai --scope user \
--env TASK_MASTER_TOOLS="core" \
-- npx -y task-master-ai@latest
# Custom tools example
claude mcp add task-master-ai --scope user \
--env TASK_MASTER_TOOLS="get_tasks,next_task,set_task_status" \
-- npx -y task-master-ai@latest
```
### Tool Sets Details
**Core Tools (7):** `get_tasks`, `next_task`, `get_task`, `set_task_status`, `update_subtask`, `parse_prd`, `expand_task`
**Standard Tools (15):** All core tools plus `initialize_project`, `analyze_project_complexity`, `expand_all`, `add_subtask`, `remove_task`, `generate`, `add_task`, `complexity_report`
**All Tools (36):** Complete set including project setup, task management, analysis, dependencies, tags, research, and more
### Recommendations
- **New users**: Start with `"standard"` mode for a good balance
- **Large projects**: Use `"core"` mode to minimize token usage
- **Complex workflows**: Use `"all"` mode or custom selection
- **Backward compatibility**: If not specified, defaults to `"all"` mode
## Claude Code Support
Task Master now supports Claude models through the Claude Code CLI, which requires no API key:

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@@ -13,6 +13,126 @@ The MCP interface is built on top of the `fastmcp` library and registers a set o
Each tool is defined with a name, a description, and a set of parameters that are validated using the `zod` library. The `execute` function of each tool calls the corresponding core logic function from `scripts/modules/task-manager.js`.
## Configurable Tool Loading
To optimize LLM context usage, you can control which Task Master MCP tools are loaded using the `TASK_MASTER_TOOLS` environment variable. This is particularly useful when working with LLMs that have context limits or when you only need a subset of tools.
### Configuration Modes
#### All Tools (Default)
Loads all 36 available tools. Use when you need full Task Master functionality.
```json
{
"mcpServers": {
"task-master-ai": {
"command": "npx",
"args": ["-y", "task-master-ai"],
"env": {
"TASK_MASTER_TOOLS": "all",
"ANTHROPIC_API_KEY": "your_key_here"
}
}
}
}
```
If `TASK_MASTER_TOOLS` is not set, all tools are loaded by default.
#### Core Tools (Lean Mode)
Loads only 7 essential tools for daily development. Ideal for minimal context usage.
**Core tools included:**
- `get_tasks` - List all tasks
- `next_task` - Find the next task to work on
- `get_task` - Get detailed task information
- `set_task_status` - Update task status
- `update_subtask` - Add implementation notes
- `parse_prd` - Generate tasks from PRD
- `expand_task` - Break down tasks into subtasks
```json
{
"mcpServers": {
"task-master-ai": {
"command": "npx",
"args": ["-y", "task-master-ai"],
"env": {
"TASK_MASTER_TOOLS": "core",
"ANTHROPIC_API_KEY": "your_key_here"
}
}
}
}
```
You can also use `"lean"` as an alias for `"core"`.
#### Standard Tools
Loads 15 commonly used tools. Balances functionality with context efficiency.
**Standard tools include all core tools plus:**
- `initialize_project` - Set up new projects
- `analyze_project_complexity` - Analyze task complexity
- `expand_all` - Expand all eligible tasks
- `add_subtask` - Add subtasks manually
- `remove_task` - Remove tasks
- `generate` - Generate task markdown files
- `add_task` - Create new tasks
- `complexity_report` - View complexity analysis
```json
{
"mcpServers": {
"task-master-ai": {
"command": "npx",
"args": ["-y", "task-master-ai"],
"env": {
"TASK_MASTER_TOOLS": "standard",
"ANTHROPIC_API_KEY": "your_key_here"
}
}
}
}
```
#### Custom Tool Selection
Specify exactly which tools to load using a comma-separated list. Tool names are case-insensitive and support both underscores and hyphens.
```json
{
"mcpServers": {
"task-master-ai": {
"command": "npx",
"args": ["-y", "task-master-ai"],
"env": {
"TASK_MASTER_TOOLS": "get_tasks,next_task,set_task_status,update_subtask",
"ANTHROPIC_API_KEY": "your_key_here"
}
}
}
}
```
### Choosing the Right Configuration
- **Use `core`/`lean`**: When working with basic task management workflows or when context limits are strict
- **Use `standard`**: For most development workflows that include task creation and analysis
- **Use `all`**: When you need full functionality including tag management, dependencies, and advanced features
- **Use custom list**: When you have specific tool requirements or want to experiment with minimal sets
### Verification
When the MCP server starts, it logs which tools were loaded:
```
Task Master MCP Server starting...
Tool mode configuration: standard
Loading standard tools
Registering 15 MCP tools (mode: standard)
Successfully registered 15/15 tools
```
## Tool Categories
The MCP tools can be categorized in the same way as the core functionalities:

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@@ -37,6 +37,25 @@ For MCP/Cursor usage: Configure keys in the env section of your .cursor/mcp.json
}
```
<Tip>
**Optimize Context Usage**: You can control which Task Master MCP tools are loaded using the `TASK_MASTER_TOOLS` environment variable. This helps reduce LLM context usage by only loading the tools you need.
Options:
- `all` (default) - All 36 tools
- `standard` - 15 commonly used tools
- `core` or `lean` - 7 essential tools
Example:
```json
"env": {
"TASK_MASTER_TOOLS": "standard",
"ANTHROPIC_API_KEY": "your_key_here"
}
```
See the [MCP Tools documentation](/capabilities/mcp#configurable-tool-loading) for details.
</Tip>
### CLI Usage: `.env` File
Create a `.env` file in your project root and include the keys for the providers you plan to use:

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@@ -59,6 +59,76 @@ Taskmaster uses two primary methods for configuration:
- **Migration:** Use `task-master migrate` to move this to `.taskmaster/config.json`.
- **Deprecation:** While still supported, you'll see warnings encouraging migration to the new structure.
## MCP Tool Loading Configuration
### TASK_MASTER_TOOLS Environment Variable
The `TASK_MASTER_TOOLS` environment variable controls which tools are loaded by the Task Master MCP server. This allows you to optimize token usage based on your workflow needs.
> Note
> Prefer setting `TASK_MASTER_TOOLS` in your MCP client's `env` block (e.g., `.cursor/mcp.json`) or in CI/deployment env. The `.env` file is reserved for API keys/endpoints; avoid persisting non-secret settings there.
#### Configuration Options
- **`all`** (default): Loads all 36 available tools (~21,000 tokens)
- Best for: Users who need the complete feature set
- Use when: Working with complex projects requiring all Task Master features
- Backward compatibility: This is the default to maintain compatibility with existing installations
- **`standard`**: Loads 15 commonly used tools (~10,000 tokens, 50% reduction)
- Best for: Regular task management workflows
- Tools included: All core tools plus project initialization, complexity analysis, task generation, and more
- Use when: You need a balanced set of features with reduced token usage
- **`core`** (or `lean`): Loads 7 essential tools (~5,000 tokens, 70% reduction)
- Best for: Daily development with minimal token overhead
- Tools included: `get_tasks`, `next_task`, `get_task`, `set_task_status`, `update_subtask`, `parse_prd`, `expand_task`
- Use when: Working in large contexts where token usage is critical
- Note: "lean" is an alias for "core" (same tools, token estimate and recommended use). You can refer to it as either "core" or "lean" when configuring.
- **Custom list**: Comma-separated list of specific tool names
- Best for: Specialized workflows requiring specific tools
- Example: `"get_tasks,next_task,set_task_status"`
- Use when: You know exactly which tools you need
#### How to Configure
1. **In MCP configuration files** (`.cursor/mcp.json`, `.vscode/mcp.json`, etc.) - **Recommended**:
```jsonc
{
"mcpServers": {
"task-master-ai": {
"env": {
"TASK_MASTER_TOOLS": "standard", // Set tool loading mode
// API keys can still use .env for security
}
}
}
}
```
2. **Via Claude Code CLI**:
```bash
claude mcp add task-master-ai --scope user \
--env TASK_MASTER_TOOLS="core" \
-- npx -y task-master-ai@latest
```
3. **In CI/deployment environment variables**:
```bash
export TASK_MASTER_TOOLS="standard"
node mcp-server/server.js
```
#### Tool Loading Behavior
- When `TASK_MASTER_TOOLS` is unset or empty, the system defaults to `"all"`
- Invalid tool names in a user-specified list are ignored (a warning is emitted for each)
- If every tool name in a custom list is invalid, the system falls back to `"all"`
- Tool names are case-insensitive (e.g., `"CORE"`, `"core"`, and `"Core"` are treated identically)
## Environment Variables (`.env` file or MCP `env` block - For API Keys Only)
- Used **exclusively** for sensitive API keys and specific endpoint URLs.

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@@ -4,12 +4,14 @@ import dotenv from 'dotenv';
import { fileURLToPath } from 'url';
import fs from 'fs';
import logger from './logger.js';
import { registerTaskMasterTools } from './tools/index.js';
import {
registerTaskMasterTools,
getToolsConfiguration
} from './tools/index.js';
import ProviderRegistry from '../../src/provider-registry/index.js';
import { MCPProvider } from './providers/mcp-provider.js';
import packageJson from '../../package.json' with { type: 'json' };
// Load environment variables
dotenv.config();
// Constants
@@ -29,12 +31,10 @@ class TaskMasterMCPServer {
this.server = new FastMCP(this.options);
this.initialized = false;
// Bind methods
this.init = this.init.bind(this);
this.start = this.start.bind(this);
this.stop = this.stop.bind(this);
// Setup logging
this.logger = logger;
}
@@ -44,8 +44,34 @@ class TaskMasterMCPServer {
async init() {
if (this.initialized) return;
// Pass the manager instance to the tool registration function
registerTaskMasterTools(this.server, this.asyncManager);
const normalizedToolMode = getToolsConfiguration();
this.logger.info('Task Master MCP Server starting...');
this.logger.info(`Tool mode configuration: ${normalizedToolMode}`);
const registrationResult = registerTaskMasterTools(
this.server,
normalizedToolMode
);
this.logger.info(
`Normalized tool mode: ${registrationResult.normalizedMode}`
);
this.logger.info(
`Registered ${registrationResult.registeredTools.length} tools successfully`
);
if (registrationResult.registeredTools.length > 0) {
this.logger.debug(
`Registered tools: ${registrationResult.registeredTools.join(', ')}`
);
}
if (registrationResult.failedTools.length > 0) {
this.logger.warn(
`Failed to register ${registrationResult.failedTools.length} tools: ${registrationResult.failedTools.join(', ')}`
);
}
this.initialized = true;

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@@ -3,109 +3,238 @@
* Export all Task Master CLI tools for MCP server
*/
import { registerListTasksTool } from './get-tasks.js';
import logger from '../logger.js';
import { registerSetTaskStatusTool } from './set-task-status.js';
import { registerParsePRDTool } from './parse-prd.js';
import { registerUpdateTool } from './update.js';
import { registerUpdateTaskTool } from './update-task.js';
import { registerUpdateSubtaskTool } from './update-subtask.js';
import { registerGenerateTool } from './generate.js';
import { registerShowTaskTool } from './get-task.js';
import { registerNextTaskTool } from './next-task.js';
import { registerExpandTaskTool } from './expand-task.js';
import { registerAddTaskTool } from './add-task.js';
import { registerAddSubtaskTool } from './add-subtask.js';
import { registerRemoveSubtaskTool } from './remove-subtask.js';
import { registerAnalyzeProjectComplexityTool } from './analyze.js';
import { registerClearSubtasksTool } from './clear-subtasks.js';
import { registerExpandAllTool } from './expand-all.js';
import { registerRemoveDependencyTool } from './remove-dependency.js';
import { registerValidateDependenciesTool } from './validate-dependencies.js';
import { registerFixDependenciesTool } from './fix-dependencies.js';
import { registerComplexityReportTool } from './complexity-report.js';
import { registerAddDependencyTool } from './add-dependency.js';
import { registerRemoveTaskTool } from './remove-task.js';
import { registerInitializeProjectTool } from './initialize-project.js';
import { registerModelsTool } from './models.js';
import { registerMoveTaskTool } from './move-task.js';
import { registerResponseLanguageTool } from './response-language.js';
import { registerAddTagTool } from './add-tag.js';
import { registerDeleteTagTool } from './delete-tag.js';
import { registerListTagsTool } from './list-tags.js';
import { registerUseTagTool } from './use-tag.js';
import { registerRenameTagTool } from './rename-tag.js';
import { registerCopyTagTool } from './copy-tag.js';
import { registerResearchTool } from './research.js';
import { registerRulesTool } from './rules.js';
import { registerScopeUpTool } from './scope-up.js';
import { registerScopeDownTool } from './scope-down.js';
import {
toolRegistry,
coreTools,
standardTools,
getAvailableTools,
getToolRegistration,
isValidTool
} from './tool-registry.js';
/**
* Register all Task Master tools with the MCP server
* @param {Object} server - FastMCP server instance
* Helper function to safely read and normalize the TASK_MASTER_TOOLS environment variable
* @returns {string} The tools configuration string, defaults to 'all'
*/
export function registerTaskMasterTools(server) {
export function getToolsConfiguration() {
const rawValue = process.env.TASK_MASTER_TOOLS;
if (!rawValue || rawValue.trim() === '') {
logger.debug('No TASK_MASTER_TOOLS env var found, defaulting to "all"');
return 'all';
}
const normalizedValue = rawValue.trim();
logger.debug(`TASK_MASTER_TOOLS env var: "${normalizedValue}"`);
return normalizedValue;
}
/**
* Register Task Master tools with the MCP server
* Supports selective tool loading via TASK_MASTER_TOOLS environment variable
* @param {Object} server - FastMCP server instance
* @param {string} toolMode - The tool mode configuration (defaults to 'all')
* @returns {Object} Object containing registered tools, failed tools, and normalized mode
*/
export function registerTaskMasterTools(server, toolMode = 'all') {
const registeredTools = [];
const failedTools = [];
try {
// Register each tool in a logical workflow order
const enabledTools = toolMode.trim();
let toolsToRegister = [];
// Group 1: Initialization & Setup
registerInitializeProjectTool(server);
registerModelsTool(server);
registerRulesTool(server);
registerParsePRDTool(server);
const lowerCaseConfig = enabledTools.toLowerCase();
// Group 2: Task Analysis & Expansion
registerAnalyzeProjectComplexityTool(server);
registerExpandTaskTool(server);
registerExpandAllTool(server);
registerScopeUpTool(server);
registerScopeDownTool(server);
switch (lowerCaseConfig) {
case 'all':
toolsToRegister = Object.keys(toolRegistry);
logger.info('Loading all available tools');
break;
case 'core':
case 'lean':
toolsToRegister = coreTools;
logger.info('Loading core tools only');
break;
case 'standard':
toolsToRegister = standardTools;
logger.info('Loading standard tools');
break;
default:
const requestedTools = enabledTools
.split(',')
.map((t) => t.trim())
.filter((t) => t.length > 0);
// Group 3: Task Listing & Viewing
registerListTasksTool(server);
registerShowTaskTool(server);
registerNextTaskTool(server);
registerComplexityReportTool(server);
const uniqueTools = new Set();
const unknownTools = [];
// Group 4: Task Status & Management
registerSetTaskStatusTool(server);
registerGenerateTool(server);
const aliasMap = {
response_language: 'response-language'
};
// Group 5: Task Creation & Modification
registerAddTaskTool(server);
registerAddSubtaskTool(server);
registerUpdateTool(server);
registerUpdateTaskTool(server);
registerUpdateSubtaskTool(server);
registerRemoveTaskTool(server);
registerRemoveSubtaskTool(server);
registerClearSubtasksTool(server);
registerMoveTaskTool(server);
for (const toolName of requestedTools) {
let resolvedName = null;
const lowerToolName = toolName.toLowerCase();
// Group 6: Dependency Management
registerAddDependencyTool(server);
registerRemoveDependencyTool(server);
registerValidateDependenciesTool(server);
registerFixDependenciesTool(server);
registerResponseLanguageTool(server);
if (aliasMap[lowerToolName]) {
const aliasTarget = aliasMap[lowerToolName];
for (const registryKey of Object.keys(toolRegistry)) {
if (registryKey.toLowerCase() === aliasTarget.toLowerCase()) {
resolvedName = registryKey;
break;
}
}
}
// Group 7: Tag Management
registerListTagsTool(server);
registerAddTagTool(server);
registerDeleteTagTool(server);
registerUseTagTool(server);
registerRenameTagTool(server);
registerCopyTagTool(server);
if (!resolvedName) {
for (const registryKey of Object.keys(toolRegistry)) {
if (registryKey.toLowerCase() === lowerToolName) {
resolvedName = registryKey;
break;
}
}
}
// Group 8: Research Features
registerResearchTool(server);
if (!resolvedName) {
const withHyphens = lowerToolName.replace(/_/g, '-');
for (const registryKey of Object.keys(toolRegistry)) {
if (registryKey.toLowerCase() === withHyphens) {
resolvedName = registryKey;
break;
}
}
}
if (!resolvedName) {
const withUnderscores = lowerToolName.replace(/-/g, '_');
for (const registryKey of Object.keys(toolRegistry)) {
if (registryKey.toLowerCase() === withUnderscores) {
resolvedName = registryKey;
break;
}
}
}
if (resolvedName) {
uniqueTools.add(resolvedName);
logger.debug(`Resolved tool "${toolName}" to "${resolvedName}"`);
} else {
unknownTools.push(toolName);
logger.warn(`Unknown tool specified: "${toolName}"`);
}
}
toolsToRegister = Array.from(uniqueTools);
if (unknownTools.length > 0) {
logger.warn(`Unknown tools: ${unknownTools.join(', ')}`);
}
if (toolsToRegister.length === 0) {
logger.warn(
`No valid tools found in custom list. Loading all tools as fallback.`
);
toolsToRegister = Object.keys(toolRegistry);
} else {
logger.info(
`Loading ${toolsToRegister.length} custom tools from list (${uniqueTools.size} unique after normalization)`
);
}
break;
}
logger.info(
`Registering ${toolsToRegister.length} MCP tools (mode: ${enabledTools})`
);
toolsToRegister.forEach((toolName) => {
try {
const registerFunction = getToolRegistration(toolName);
if (registerFunction) {
registerFunction(server);
logger.debug(`Registered tool: ${toolName}`);
registeredTools.push(toolName);
} else {
logger.warn(`Tool ${toolName} not found in registry`);
failedTools.push(toolName);
}
} catch (error) {
if (error.message && error.message.includes('already registered')) {
logger.debug(`Tool ${toolName} already registered, skipping`);
registeredTools.push(toolName);
} else {
logger.error(`Failed to register tool ${toolName}: ${error.message}`);
failedTools.push(toolName);
}
}
});
logger.info(
`Successfully registered ${registeredTools.length}/${toolsToRegister.length} tools`
);
if (failedTools.length > 0) {
logger.warn(`Failed tools: ${failedTools.join(', ')}`);
}
return {
registeredTools,
failedTools,
normalizedMode: lowerCaseConfig
};
} catch (error) {
logger.error(`Error registering Task Master tools: ${error.message}`);
throw error;
logger.error(
`Error parsing TASK_MASTER_TOOLS environment variable: ${error.message}`
);
logger.info('Falling back to loading all tools');
const fallbackTools = Object.keys(toolRegistry);
for (const toolName of fallbackTools) {
const registerFunction = getToolRegistration(toolName);
if (registerFunction) {
try {
registerFunction(server);
registeredTools.push(toolName);
} catch (err) {
if (err.message && err.message.includes('already registered')) {
logger.debug(
`Fallback tool ${toolName} already registered, skipping`
);
registeredTools.push(toolName);
} else {
logger.warn(
`Failed to register fallback tool '${toolName}': ${err.message}`
);
failedTools.push(toolName);
}
}
} else {
logger.warn(`Tool '${toolName}' not found in registry`);
failedTools.push(toolName);
}
}
logger.info(
`Successfully registered ${registeredTools.length} fallback tools`
);
return {
registeredTools,
failedTools,
normalizedMode: 'all'
};
}
}
export {
toolRegistry,
coreTools,
standardTools,
getAvailableTools,
getToolRegistration,
isValidTool
};
export default {
registerTaskMasterTools
};

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@@ -0,0 +1,168 @@
/**
* tool-registry.js
* Tool Registry Object Structure - Maps all 36 tool names to registration functions
*/
import { registerListTasksTool } from './get-tasks.js';
import { registerSetTaskStatusTool } from './set-task-status.js';
import { registerParsePRDTool } from './parse-prd.js';
import { registerUpdateTool } from './update.js';
import { registerUpdateTaskTool } from './update-task.js';
import { registerUpdateSubtaskTool } from './update-subtask.js';
import { registerGenerateTool } from './generate.js';
import { registerShowTaskTool } from './get-task.js';
import { registerNextTaskTool } from './next-task.js';
import { registerExpandTaskTool } from './expand-task.js';
import { registerAddTaskTool } from './add-task.js';
import { registerAddSubtaskTool } from './add-subtask.js';
import { registerRemoveSubtaskTool } from './remove-subtask.js';
import { registerAnalyzeProjectComplexityTool } from './analyze.js';
import { registerClearSubtasksTool } from './clear-subtasks.js';
import { registerExpandAllTool } from './expand-all.js';
import { registerRemoveDependencyTool } from './remove-dependency.js';
import { registerValidateDependenciesTool } from './validate-dependencies.js';
import { registerFixDependenciesTool } from './fix-dependencies.js';
import { registerComplexityReportTool } from './complexity-report.js';
import { registerAddDependencyTool } from './add-dependency.js';
import { registerRemoveTaskTool } from './remove-task.js';
import { registerInitializeProjectTool } from './initialize-project.js';
import { registerModelsTool } from './models.js';
import { registerMoveTaskTool } from './move-task.js';
import { registerResponseLanguageTool } from './response-language.js';
import { registerAddTagTool } from './add-tag.js';
import { registerDeleteTagTool } from './delete-tag.js';
import { registerListTagsTool } from './list-tags.js';
import { registerUseTagTool } from './use-tag.js';
import { registerRenameTagTool } from './rename-tag.js';
import { registerCopyTagTool } from './copy-tag.js';
import { registerResearchTool } from './research.js';
import { registerRulesTool } from './rules.js';
import { registerScopeUpTool } from './scope-up.js';
import { registerScopeDownTool } from './scope-down.js';
/**
* Comprehensive tool registry mapping all 36 tool names to their registration functions
* Used for dynamic tool registration and validation
*/
export const toolRegistry = {
initialize_project: registerInitializeProjectTool,
models: registerModelsTool,
rules: registerRulesTool,
parse_prd: registerParsePRDTool,
'response-language': registerResponseLanguageTool,
analyze_project_complexity: registerAnalyzeProjectComplexityTool,
expand_task: registerExpandTaskTool,
expand_all: registerExpandAllTool,
scope_up_task: registerScopeUpTool,
scope_down_task: registerScopeDownTool,
get_tasks: registerListTasksTool,
get_task: registerShowTaskTool,
next_task: registerNextTaskTool,
complexity_report: registerComplexityReportTool,
set_task_status: registerSetTaskStatusTool,
generate: registerGenerateTool,
add_task: registerAddTaskTool,
add_subtask: registerAddSubtaskTool,
update: registerUpdateTool,
update_task: registerUpdateTaskTool,
update_subtask: registerUpdateSubtaskTool,
remove_task: registerRemoveTaskTool,
remove_subtask: registerRemoveSubtaskTool,
clear_subtasks: registerClearSubtasksTool,
move_task: registerMoveTaskTool,
add_dependency: registerAddDependencyTool,
remove_dependency: registerRemoveDependencyTool,
validate_dependencies: registerValidateDependenciesTool,
fix_dependencies: registerFixDependenciesTool,
list_tags: registerListTagsTool,
add_tag: registerAddTagTool,
delete_tag: registerDeleteTagTool,
use_tag: registerUseTagTool,
rename_tag: registerRenameTagTool,
copy_tag: registerCopyTagTool,
research: registerResearchTool
};
/**
* Core tools array containing the 7 essential tools for daily development
* These represent the minimal set needed for basic task management operations
*/
export const coreTools = [
'get_tasks',
'next_task',
'get_task',
'set_task_status',
'update_subtask',
'parse_prd',
'expand_task'
];
/**
* Standard tools array containing the 15 most commonly used tools
* Includes all core tools plus frequently used additional tools
*/
export const standardTools = [
...coreTools,
'initialize_project',
'analyze_project_complexity',
'expand_all',
'add_subtask',
'remove_task',
'generate',
'add_task',
'complexity_report'
];
/**
* Get all available tool names
* @returns {string[]} Array of tool names
*/
export function getAvailableTools() {
return Object.keys(toolRegistry);
}
/**
* Get tool counts for all categories
* @returns {Object} Object with core, standard, and total counts
*/
export function getToolCounts() {
return {
core: coreTools.length,
standard: standardTools.length,
total: Object.keys(toolRegistry).length
};
}
/**
* Get tool arrays organized by category
* @returns {Object} Object with arrays for each category
*/
export function getToolCategories() {
const allTools = Object.keys(toolRegistry);
return {
core: [...coreTools],
standard: [...standardTools],
all: [...allTools],
extended: allTools.filter((t) => !standardTools.includes(t))
};
}
/**
* Get registration function for a specific tool
* @param {string} toolName - Name of the tool
* @returns {Function|null} Registration function or null if not found
*/
export function getToolRegistration(toolName) {
return toolRegistry[toolName] || null;
}
/**
* Validate if a tool exists in the registry
* @param {string} toolName - Name of the tool
* @returns {boolean} True if tool exists
*/
export function isValidTool(toolName) {
return toolName in toolRegistry;
}
export default toolRegistry;

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/**
* tool-counts.js
* Shared helper for validating tool counts across tests and validation scripts
*/
import {
getToolCounts,
getToolCategories
} from '../../mcp-server/src/tools/tool-registry.js';
/**
* Expected tool counts - update these when tools are added/removed
* These serve as the canonical source of truth for expected counts
*/
export const EXPECTED_TOOL_COUNTS = {
core: 7,
standard: 15,
total: 36
};
/**
* Expected core tools list for validation
*/
export const EXPECTED_CORE_TOOLS = [
'get_tasks',
'next_task',
'get_task',
'set_task_status',
'update_subtask',
'parse_prd',
'expand_task'
];
/**
* Validate that actual tool counts match expected counts
* @returns {Object} Validation result with isValid flag and details
*/
export function validateToolCounts() {
const actual = getToolCounts();
const expected = EXPECTED_TOOL_COUNTS;
const isValid =
actual.core === expected.core &&
actual.standard === expected.standard &&
actual.total === expected.total;
return {
isValid,
actual,
expected,
differences: {
core: actual.core - expected.core,
standard: actual.standard - expected.standard,
total: actual.total - expected.total
}
};
}
/**
* Validate that tool categories have correct structure and content
* @returns {Object} Validation result
*/
export function validateToolStructure() {
const categories = getToolCategories();
const counts = getToolCounts();
// Check that core tools are subset of standard tools
const coreInStandard = categories.core.every((tool) =>
categories.standard.includes(tool)
);
// Check that standard tools are subset of all tools
const standardInAll = categories.standard.every((tool) =>
categories.all.includes(tool)
);
// Check that expected core tools match actual
const expectedCoreMatch =
EXPECTED_CORE_TOOLS.every((tool) => categories.core.includes(tool)) &&
categories.core.every((tool) => EXPECTED_CORE_TOOLS.includes(tool));
// Check array lengths match counts
const lengthsMatch =
categories.core.length === counts.core &&
categories.standard.length === counts.standard &&
categories.all.length === counts.total;
return {
isValid:
coreInStandard && standardInAll && expectedCoreMatch && lengthsMatch,
details: {
coreInStandard,
standardInAll,
expectedCoreMatch,
lengthsMatch
},
categories,
counts
};
}
/**
* Get a detailed report of all tool information
* @returns {Object} Comprehensive tool information
*/
export function getToolReport() {
const counts = getToolCounts();
const categories = getToolCategories();
const validation = validateToolCounts();
const structure = validateToolStructure();
return {
counts,
categories,
validation,
structure,
summary: {
totalValid: validation.isValid && structure.isValid,
countsValid: validation.isValid,
structureValid: structure.isValid
}
};
}

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/**
* tool-registration.test.js
* Comprehensive unit tests for the Task Master MCP tool registration system
* Tests environment variable control system covering all configuration modes and edge cases
*/
import {
describe,
it,
expect,
beforeEach,
afterEach,
jest
} from '@jest/globals';
import {
EXPECTED_TOOL_COUNTS,
EXPECTED_CORE_TOOLS,
validateToolCounts,
validateToolStructure
} from '../../../helpers/tool-counts.js';
import { registerTaskMasterTools } from '../../../../mcp-server/src/tools/index.js';
import {
toolRegistry,
coreTools,
standardTools
} from '../../../../mcp-server/src/tools/tool-registry.js';
// Derive constants from imported registry to avoid brittle magic numbers
const ALL_COUNT = Object.keys(toolRegistry).length;
const CORE_COUNT = coreTools.length;
const STANDARD_COUNT = standardTools.length;
describe('Task Master Tool Registration System', () => {
let mockServer;
let originalEnv;
beforeEach(() => {
originalEnv = process.env.TASK_MASTER_TOOLS;
mockServer = {
tools: [],
addTool: jest.fn((tool) => {
mockServer.tools.push(tool);
return tool;
})
};
delete process.env.TASK_MASTER_TOOLS;
});
afterEach(() => {
if (originalEnv !== undefined) {
process.env.TASK_MASTER_TOOLS = originalEnv;
} else {
delete process.env.TASK_MASTER_TOOLS;
}
jest.clearAllMocks();
});
describe('Test Environment Setup', () => {
it('should have properly configured mock server', () => {
expect(mockServer).toBeDefined();
expect(typeof mockServer.addTool).toBe('function');
expect(Array.isArray(mockServer.tools)).toBe(true);
expect(mockServer.tools.length).toBe(0);
});
it('should have correct tool registry structure', () => {
const validation = validateToolCounts();
expect(validation.isValid).toBe(true);
if (!validation.isValid) {
console.error('Tool count validation failed:', validation);
}
expect(validation.actual.total).toBe(EXPECTED_TOOL_COUNTS.total);
expect(validation.actual.core).toBe(EXPECTED_TOOL_COUNTS.core);
expect(validation.actual.standard).toBe(EXPECTED_TOOL_COUNTS.standard);
});
it('should have correct core tools', () => {
const structure = validateToolStructure();
expect(structure.isValid).toBe(true);
if (!structure.isValid) {
console.error('Tool structure validation failed:', structure);
}
expect(coreTools).toEqual(expect.arrayContaining(EXPECTED_CORE_TOOLS));
expect(coreTools.length).toBe(EXPECTED_TOOL_COUNTS.core);
});
it('should have correct standard tools that include all core tools', () => {
const structure = validateToolStructure();
expect(structure.details.coreInStandard).toBe(true);
expect(standardTools.length).toBe(EXPECTED_TOOL_COUNTS.standard);
coreTools.forEach((tool) => {
expect(standardTools).toContain(tool);
});
});
it('should have all expected tools in registry', () => {
const expectedTools = [
'initialize_project',
'models',
'research',
'add_tag',
'delete_tag',
'get_tasks',
'next_task',
'get_task'
];
expectedTools.forEach((tool) => {
expect(toolRegistry).toHaveProperty(tool);
});
});
});
describe('Configuration Modes', () => {
it(`should register all tools (${ALL_COUNT}) when TASK_MASTER_TOOLS is not set (default behavior)`, () => {
delete process.env.TASK_MASTER_TOOLS;
registerTaskMasterTools(mockServer);
expect(mockServer.addTool).toHaveBeenCalledTimes(
EXPECTED_TOOL_COUNTS.total
);
});
it(`should register all tools (${ALL_COUNT}) when TASK_MASTER_TOOLS=all`, () => {
process.env.TASK_MASTER_TOOLS = 'all';
registerTaskMasterTools(mockServer);
expect(mockServer.addTool).toHaveBeenCalledTimes(ALL_COUNT);
});
it(`should register exactly ${CORE_COUNT} core tools when TASK_MASTER_TOOLS=core`, () => {
process.env.TASK_MASTER_TOOLS = 'core';
registerTaskMasterTools(mockServer, 'core');
expect(mockServer.addTool).toHaveBeenCalledTimes(
EXPECTED_TOOL_COUNTS.core
);
});
it(`should register exactly ${STANDARD_COUNT} standard tools when TASK_MASTER_TOOLS=standard`, () => {
process.env.TASK_MASTER_TOOLS = 'standard';
registerTaskMasterTools(mockServer, 'standard');
expect(mockServer.addTool).toHaveBeenCalledTimes(
EXPECTED_TOOL_COUNTS.standard
);
});
it(`should treat lean as alias for core mode (${CORE_COUNT} tools)`, () => {
process.env.TASK_MASTER_TOOLS = 'lean';
registerTaskMasterTools(mockServer, 'lean');
expect(mockServer.addTool).toHaveBeenCalledTimes(CORE_COUNT);
});
it('should handle case insensitive configuration values', () => {
process.env.TASK_MASTER_TOOLS = 'CORE';
registerTaskMasterTools(mockServer, 'CORE');
expect(mockServer.addTool).toHaveBeenCalledTimes(CORE_COUNT);
});
});
describe('Custom Tool Selection and Edge Cases', () => {
it('should register specific tools from comma-separated list', () => {
process.env.TASK_MASTER_TOOLS = 'get_tasks,next_task,get_task';
registerTaskMasterTools(mockServer, 'get_tasks,next_task,get_task');
expect(mockServer.addTool).toHaveBeenCalledTimes(3);
});
it('should handle mixed valid and invalid tool names gracefully', () => {
process.env.TASK_MASTER_TOOLS =
'invalid_tool,get_tasks,fake_tool,next_task';
registerTaskMasterTools(
mockServer,
'invalid_tool,get_tasks,fake_tool,next_task'
);
expect(mockServer.addTool).toHaveBeenCalledTimes(2);
});
it('should default to all tools with completely invalid input', () => {
process.env.TASK_MASTER_TOOLS = 'completely_invalid';
registerTaskMasterTools(mockServer);
expect(mockServer.addTool).toHaveBeenCalledTimes(ALL_COUNT);
});
it('should handle empty string environment variable', () => {
process.env.TASK_MASTER_TOOLS = '';
registerTaskMasterTools(mockServer);
expect(mockServer.addTool).toHaveBeenCalledTimes(ALL_COUNT);
});
it('should handle whitespace in comma-separated lists', () => {
process.env.TASK_MASTER_TOOLS = ' get_tasks , next_task , get_task ';
registerTaskMasterTools(mockServer, ' get_tasks , next_task , get_task ');
expect(mockServer.addTool).toHaveBeenCalledTimes(3);
});
it('should ignore duplicate tools in list', () => {
process.env.TASK_MASTER_TOOLS = 'get_tasks,get_tasks,next_task,get_tasks';
registerTaskMasterTools(
mockServer,
'get_tasks,get_tasks,next_task,get_tasks'
);
expect(mockServer.addTool).toHaveBeenCalledTimes(2);
});
it('should handle only commas and empty entries', () => {
process.env.TASK_MASTER_TOOLS = ',,,';
registerTaskMasterTools(mockServer);
expect(mockServer.addTool).toHaveBeenCalledTimes(ALL_COUNT);
});
it('should handle single tool selection', () => {
process.env.TASK_MASTER_TOOLS = 'get_tasks';
registerTaskMasterTools(mockServer, 'get_tasks');
expect(mockServer.addTool).toHaveBeenCalledTimes(1);
});
});
describe('Coverage Analysis and Integration Tests', () => {
it('should provide 100% code coverage for environment control logic', () => {
const testCases = [
{
env: undefined,
expectedCount: ALL_COUNT,
description: 'undefined env (all)'
},
{
env: '',
expectedCount: ALL_COUNT,
description: 'empty string (all)'
},
{ env: 'all', expectedCount: ALL_COUNT, description: 'all mode' },
{ env: 'core', expectedCount: CORE_COUNT, description: 'core mode' },
{
env: 'lean',
expectedCount: CORE_COUNT,
description: 'lean mode (alias)'
},
{
env: 'standard',
expectedCount: STANDARD_COUNT,
description: 'standard mode'
},
{
env: 'get_tasks,next_task',
expectedCount: 2,
description: 'custom list'
},
{
env: 'invalid_tool',
expectedCount: ALL_COUNT,
description: 'invalid fallback'
}
];
testCases.forEach((testCase) => {
delete process.env.TASK_MASTER_TOOLS;
if (testCase.env !== undefined) {
process.env.TASK_MASTER_TOOLS = testCase.env;
}
mockServer.tools = [];
mockServer.addTool.mockClear();
registerTaskMasterTools(mockServer, testCase.env || 'all');
expect(mockServer.addTool).toHaveBeenCalledTimes(
testCase.expectedCount
);
});
});
it('should have optimal performance characteristics', () => {
const startTime = Date.now();
process.env.TASK_MASTER_TOOLS = 'all';
registerTaskMasterTools(mockServer);
const endTime = Date.now();
const executionTime = endTime - startTime;
expect(executionTime).toBeLessThan(100);
expect(mockServer.addTool).toHaveBeenCalledTimes(ALL_COUNT);
});
it('should validate token reduction claims', () => {
expect(coreTools.length).toBeLessThan(standardTools.length);
expect(standardTools.length).toBeLessThan(
Object.keys(toolRegistry).length
);
expect(coreTools.length).toBe(CORE_COUNT);
expect(standardTools.length).toBe(STANDARD_COUNT);
expect(Object.keys(toolRegistry).length).toBe(ALL_COUNT);
const allToolsCount = Object.keys(toolRegistry).length;
const coreReduction =
((allToolsCount - coreTools.length) / allToolsCount) * 100;
const standardReduction =
((allToolsCount - standardTools.length) / allToolsCount) * 100;
expect(coreReduction).toBeGreaterThan(80);
expect(standardReduction).toBeGreaterThan(50);
});
it('should maintain referential integrity of tool registry', () => {
coreTools.forEach((tool) => {
expect(standardTools).toContain(tool);
});
standardTools.forEach((tool) => {
expect(toolRegistry).toHaveProperty(tool);
});
Object.keys(toolRegistry).forEach((tool) => {
expect(typeof toolRegistry[tool]).toBe('function');
});
});
it('should handle concurrent registration attempts', () => {
process.env.TASK_MASTER_TOOLS = 'core';
registerTaskMasterTools(mockServer, 'core');
registerTaskMasterTools(mockServer, 'core');
registerTaskMasterTools(mockServer, 'core');
expect(mockServer.addTool).toHaveBeenCalledTimes(CORE_COUNT * 3);
});
it('should validate all documented tool categories exist', () => {
const allTools = Object.keys(toolRegistry);
const projectSetupTools = allTools.filter((tool) =>
['initialize_project', 'models', 'rules', 'parse_prd'].includes(tool)
);
expect(projectSetupTools.length).toBeGreaterThan(0);
const taskManagementTools = allTools.filter((tool) =>
['get_tasks', 'get_task', 'next_task', 'set_task_status'].includes(tool)
);
expect(taskManagementTools.length).toBeGreaterThan(0);
const analysisTools = allTools.filter((tool) =>
['analyze_project_complexity', 'complexity_report'].includes(tool)
);
expect(analysisTools.length).toBeGreaterThan(0);
const tagManagementTools = allTools.filter((tool) =>
['add_tag', 'delete_tag', 'list_tags', 'use_tag'].includes(tool)
);
expect(tagManagementTools.length).toBeGreaterThan(0);
});
it('should handle error conditions gracefully', () => {
const problematicInputs = [
'null',
'undefined',
' ',
'\n\t',
'special!@#$%^&*()characters',
'very,very,very,very,very,very,very,long,comma,separated,list,with,invalid,tools,that,should,fallback,to,all'
];
problematicInputs.forEach((input) => {
mockServer.tools = [];
mockServer.addTool.mockClear();
process.env.TASK_MASTER_TOOLS = input;
expect(() => registerTaskMasterTools(mockServer)).not.toThrow();
expect(mockServer.addTool).toHaveBeenCalledTimes(ALL_COUNT);
});
});
});
});