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♻️ refactor: MCPManager for Scalability, Fix App-Level Detection, Add Lazy Connections (#8930)

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* feat: MCP Connection management overhaul - Making MCPManager manageable

Refactor the monolithic MCPManager into focused, single-responsibility classes:

• MCPServersRegistry: Server configuration discovery and metadata management
• UserConnectionManager: Manages user-level connections
• ConnectionsRepository: Low-level connection pool with lazy loading
• MCPConnectionFactory: Handles MCP connection creation with OAuth support

New Features:
• Lazy loading of app-level connections for horizontal scaling
• Automatic reconnection for app-level connections
• Enhanced OAuth detection with explicit requiresOAuth flag
• Centralized MCP configuration management

Bug Fixes:
• App-level connection detection in MCPManager.callTool
• MCP Connection Reinitialization route behavior

Optimizations:
• MCPConnection.isConnected() caching to reduce overhead
• Concurrent server metadata retrieval instead of sequential

This refactoring addresses scalability bottlenecks and improves reliability
while maintaining backward compatibility with existing configurations.

* feat: Enabled import order in eslint.

* # Moved tests to __tests__ folder
# added tests for MCPServersRegistry.ts

* # Add unit tests for ConnectionsRepository functionality

* # Add unit tests for MCPConnectionFactory functionality

* # Reorganize MCP connection tests and improve error handling

* # reordering imports

* # Update testPathIgnorePatterns in jest.config.mjs to exclude development TypeScript files

* # removed mcp/manager.ts
This commit is contained in:
Theo N. Truong 2025-08-13 09:45:06 -06:00 • committed by GitHub
parent 9dbf153489
commit 8780a78165
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32 changed files with 2571 additions and 1468 deletions
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19
api/config/index.js
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@ -1,27 +1,13 @@
const { MCPManager, FlowStateManager } = require('@librechat/api');
const { EventSource } = require('eventsource');
const { Time } = require('librechat-data-provider');
const { MCPManager, FlowStateManager } = require('@librechat/api');
const logger = require('./winston');
global.EventSource = EventSource;
/** @type {MCPManager} */
let mcpManager = null;
let flowManager = null;
/**
* @param {string} [userId] - Optional user ID, to avoid disconnecting the current user.
* @returns {MCPManager}
*/
function getMCPManager(userId) {
if (!mcpManager) {
mcpManager = MCPManager.getInstance();
} else {
mcpManager.checkIdleConnections(userId);
}
return mcpManager;
}
/**
* @param {Keyv} flowsCache
* @returns {FlowStateManager}
@ -37,6 +23,7 @@ function getFlowStateManager(flowsCache) {
module.exports = {
logger,
getMCPManager,
createMCPManager: MCPManager.createInstance,
getMCPManager: MCPManager.getInstance,
getFlowStateManager,
};