按频道页组织 Claude Code 内容并划分栏目。公开区只展示已发布文章，草稿留在后台编辑和审核。
Claude Agent SDK explained: agent loop, tools, subagents, MCP, cost control and deployment. A developer guide to shipping production agents in 2026.
The Claude Agent SDK lets you build your own harness, the production layer that wraps Claude with tools, memory, guardrails, and an agentic loop. Here is what that means and when you need it.
The Claude Agent SDK is the agent harness as a library: the same loop and tools as Claude Code in Python and TypeScript, with control you write in code.
Six agent SDKs compete for production deployments in 2026. LangGraph leads on state control, CrewAI on rapid prototyping, and the vendor SDKs from Anthropic, OpenAI, and Google ship native tool execution. This guide compares architecture, benchmarks, token efficiency, and gateway compatibility so you can pick the right SDK for your stack.