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Extending Capabilities of Claude Agent SDK in TypeScript

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Overview

Extend Claude's capabilities beyond basic queries by building richer, stateful, and more integrated agent experiences. You’ll learn to maintain context with long-running clients, connect external MCP servers, wrap your own TypeScript functions as custom tools, and orchestrate specialized sub-agents—turning Claude into a flexible, multi-tool assistant tailored to your application.

Syllabus

Unit 1: Maintaining Agent State with Sessions

Observing System Initialization Messages
Capturing Session IDs from Message Streams
Building a Reusable Response Display Helper
Completing Your First Multi-Turn Conversation

Unit 2: Integrating External MCP Servers

Guiding Your Agent to Use MCP Tools
Fix MCP Tool Naming Convention
Renaming MCP Servers with Descriptive Names
Integrating External MCP Servers

Unit 3: Creating Custom MCP Tools

Testing Planning Functions Before Creating MCP Tools
Transform Functions into MCP Tools
Connecting Custom MCP Tools to an Agent
Configuring an Agent with Custom Planning Tools

Unit 4: Building Multi Agent Systems

Creating Your First AgentDefinition
Registering Your First Sub-Agent
Observing Agent Delegation with the Task Tool
Complete the Multi-Agent Code Review System
Integrating MCP Tools into Multi-Agent Systems

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