#881 · Primary category： AI Agents & Automation
open-harness
A code-first, composable SDK to build powerful AI agents
Project last updated：07/17/26
GitHub Stars
603
Forks
101
Contributors
1
License
MIT
Why we included this project
This TypeScript SDK is for teams that want to build a Claude Code-style agent in code instead of gluing one together from scratch. It sits on top of Vercel's AI SDK and gives you an Agent class, persistent Sessions that handle context compaction and retry, and a middleware pipeline, so you can add turn tracking or retries without forking the library. Filesystem and bash tools come built in, MCP server integration covers the common ground most coding agents need, and subagents let you hand work off to child agents. The package layout is a plus: core logic is separate from the React and Vue streaming hooks, so the same agent can run in a CLI, a Next.js app, or a Nuxt app. If you want explicit control over tool permissions and model providers, this code-first harness is built for that.
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