Agents and Workflows

Build agentic loops and workflows with the Messages API and the Agent SDK.

1. 1.1Building an Agent LoopHow a Claude agent actually runs in code, from the first request through tool calls to the stop reason that ends the loop.9 min
2. 1.2Workflow Patterns in CodeThe five composable workflow patterns for Claude applications, when each one beats a free-running agent, and what they look like in Python and TypeScript.9 min
3. 1.3Agent SDK BasicsWhat the Claude Agent SDK is, how it differs from the Messages API tool runner, and how to run a first query with permissions, tools and MCP servers configured.9 min