Claude Agent SDK

About

The Claude Agent SDK provides a comprehensive framework for developing sophisticated, production-ready AI agents powered by Claude. It enables developers to implement strict JSON schema validation via structured outputs, manage complex tool permissions, and orchestrate specialized subagents for distinct tasks. With advanced features like session forking for non-destructive experimentation, a robust hooks system for event-driven logic, and seamless Model Context Protocol (MCP) integration, this skill is essential for building reliable coding assistants, automated SRE systems, and security auditors that require type-safe, predictable responses.

Key Features

• 91 GitHub stars
• Comprehensive hooks system for event-driven workflows (PreToolUse, PostToolUse, etc.).
• Deep integration with Model Context Protocol (MCP) for external tool and data access.
• Structured JSON output validation using Zod or JSON schema for type-safe responses.
• Advanced session management with support for forking, resuming, and state persistence.
• Granular permission control via custom callbacks to allow, deny, or prompt for tool usage.

Use Cases

• Developing autonomous coding agents that require validated, schema-compliant JSON outputs.
• Orchestrating multi-agent systems for complex tasks like security audits or automated troubleshooting.
• Building interactive CLI tools that utilize MCP servers for filesystem and git history analysis.