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harness-sdk: Complete an agent loop with two lines of code, a project with 7.7k stars

strands-agents/harness-sdk

·2026.09.23 23:49

Automates the repetitive loop writing and state management involved in AI agent development. It provides Python and TypeScript SDKs and runs directly in local processes without a hosted control plane. It offers default configurations that eliminate the need for manual coding.

It supports major LLM providers such as Amazon Bedrock, Anthropic, OpenAI, and Gemini. MCP, streaming, multi-agent patterns, guardrails, and tracing features are built-in. It offers the flexibility to swap model backends while keeping existing code unchanged.

If you want a ready-made agent, you can instantly apply benchmarked optimal settings by simply calling create_harness(). For finer control, configure tools, memory, sessions, and hooks directly via the SDK. It is licensed under Apache 2.0, allowing free commercial use.

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GitHub repository

strands-agents/harness-sdk

Build an agent harness and control it end-to-end. Open-source SDK for production AI agents in Python & TypeScript - any model, any cloud.

Python

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