Merge pull request #3 from mcp-use/feat/ts-python-parity

refactor: enhance Logger class and update package.json repository/homepage URLs

Author: zandko

index.ts

@@ -9,4 +9,7 @@ import { WebSocketConnector } from './src/connectors/websocket.js'
 import { Logger, logger } from './src/logging.js'
 import { MCPSession } from './src/session.js'
 
+export { BaseAdapter, LangChainAdapter } from './src/adapters/index.js'
+export { ServerManager } from './src/managers/server_manager.js'
+
 export { BaseConnector, HttpConnector, loadConfigFile, Logger, logger, MCPAgent, MCPClient, MCPSession, StdioConnector, WebSocketConnector }

package.json

@@ -2,6 +2,7 @@
   "name": "mcp-use",
   "type": "module",
   "version": "0.0.6",
+  "packageManager": "[email protected]",
   "description": "A utility library for integrating Model Context Protocol (MCP) with LangChain, Zod, and related tools. Provides helpers for schema conversion, event streaming, and SDK usage.",
   "author": "Zane",
   "license": "MIT",
@@ -44,7 +45,7 @@
     "registry": "https://registry.npmjs.org"
   },
   "scripts": {
-    "build": "rm -rf dist && tsc && shx chmod +x dist/*.js",
+    "build": "rm -rf dist && tsc",
     "watch": "tsc --watch",
     "start": "node dist/index.js",
     "prepublishOnly": "pnpm run build",
@@ -56,21 +57,24 @@
   },
   "dependencies": {
     "@dmitryrechkin/json-schema-to-zod": "^1.0.1",
-    "@langchain/community": "0.3.42",
-    "@langchain/core": "0.3.54",
-    "@modelcontextprotocol/sdk": "1.11.0",
+    "@langchain/community": "0.3.45",
+    "@langchain/core": "0.3.57",
+    "@modelcontextprotocol/sdk": "1.12.1",
     "eventsource": "^3.0.6",
-    "langchain": "^0.3.24",
+    "fastembed": "^1.14.4",
+    "langchain": "^0.3.27",
+    "lodash-es": "^4.17.21",
     "uuid": "^11.1.0",
     "winston": "^3.17.0",
     "ws": "^8.18.2",
-    "zod": "^3.24.4",
+    "zod": "^3.25.48",
     "zod-to-json-schema": "^3.24.5"
   },
   "devDependencies": {
-    "@antfu/eslint-config": "^4.13.0",
+    "@antfu/eslint-config": "^4.13.2",
+    "@types/lodash-es": "^4.17.12",
     "@types/ws": "^8.18.1",
-    "eslint": "^9.26.0",
+    "eslint": "^9.28.0",
     "eslint-plugin-format": "^1.0.1",
     "shx": "^0.4.0",
     "typescript": "^5.8.3"

pnpm-lock.yaml

@@ -102,7 +102,7 @@ export class LangChainAdapter extends BaseAdapter<StructuredToolInterface> {
           return parseMcpToolResult(result)
         }
         catch (err: any) {
-          logger.error(`Error executing MCP tool: ${err}`)
+          logger.error(`Error executing MCP tool: ${err.message}`)
           return `Error executing MCP tool: ${String(err)}`
         }
       },

src/adapters/langchain_adapter.ts

@@ -1,3 +1,2 @@
 export { BaseAgent } from './base.js'
 export { MCPAgent } from './mcp_agent.js'
-export { ServerManager } from './server_manager.js'

src/agents/index.ts

@@ -6,8 +6,8 @@ import type { StructuredToolInterface, ToolInterface } from '@langchain/core/too
 import type { AgentFinish, AgentStep } from 'langchain/agents'
 import type { MCPClient } from '../client.js'
 import type { BaseConnector } from '../connectors/base.js'
+import type { ServerManager } from '../managers/server_manager.js'
 import type { MCPSession } from '../session.js'
-import type { ServerManager } from './server_manager.js'
 import {
   AIMessage,
   HumanMessage,
@@ -107,7 +107,7 @@ export class MCPAgent {
       await this.serverManager.initialize()
 
       // Get server management tools
-      const managementTools = await this.serverManager.getServerManagementTools()
+      const managementTools = this.serverManager.tools
       this.tools = managementTools
       logger.info(
         `🔧 Server manager mode active with ${managementTools.length} management tools`,
@@ -302,7 +302,7 @@ export class MCPAgent {
 
       for (let stepNum = 0; stepNum < steps; stepNum++) {
         if (this.useServerManager && this.serverManager) {
-          const currentTools = await this.serverManager.getAllTools()
+          const currentTools = this.serverManager.tools
           const currentToolNames = new Set(currentTools.map(t => t.name))
           const existingToolNames = new Set(this.tools.map(t => t.name))
 
@@ -322,7 +322,7 @@ export class MCPAgent {
           }
         }
 
-        logger.info(`🔍 Step ${stepNum + 1}/${steps}`)
+        logger.info(`👣 Step ${stepNum + 1}/${steps}`)
 
         try {
           logger.debug('Starting agent step execution')

src/agents/mcp_agent.ts

@@ -95,10 +95,13 @@ export class MCPClient {
     return this.sessions
   }
 
-  public getSession(serverName: string): MCPSession {
+  public getSession(serverName: string): MCPSession | null {
     const session = this.sessions[serverName]
+    // if (!session) {
+    //   throw new Error(`No session exists for server '${serverName}'`)
+    // }
     if (!session) {
-      throw new Error(`No session exists for server '${serverName}'`)
+      return null
     }
     return session
   }