Pre-built, configurable agent harness that runs in managed infrastructure. Best for long-running tasks and asynchronous work.
Introducing advanced tool use on the Claude Developer Platform
Claude can now discover, learn, and execute tools dynamically to enable agents that take action in the real world. Here’s how.
What is a Harness? | EARENDIL
An agent harness is a piece of software that provides an environment for an AI model to operate within.
All the Agents — 549 Coding Agent Harnesses
The maintained catalog of every coding agent harness, the multiplexers that manage them, and the SDKs used to build them.
Tool use with Claude
Connect Claude to external tools and APIs. Learn where tools execute and how the agentic loop works.
Building Commerce Agents with Claude | Claude by Anthropic
We're launching a blueprint to help build commerce agents on Claude. It contains the harnesses, patterns, and guardrails an engineering team needs to get a commerce agent running in days.
Building an Advanced Agentic Harness | Data For Science
From a single pilot to an air campaign: planning, parallelism, memory, verification, and observability for production-shaped agents.
Agent Plugins
A portable package format for reusable components that extend AI agents.
Claude on Twitter / X
With self-hosted sandboxes, you can run agents in any environment you control: your own infrastructure, or managed providers like Cloudflare, Daytona, Modal, or Vercel. pic.twitter.com/OELUCt7QRf— Claude (@claudeai) May 19, 2026
What is an Agent Harness? | Rubric Labs
A harness is the software that translates a model into a system that can affect its environment. Agent = Model + Harness.
The Anatomy of an Agent Harness
Learn how agent harnesses transform AI models into autonomous work engines. Explore core components: filesystems, sandboxes, and memory.
pi/packages/agent/docs/harness-v2.md at harness-v2/j4 · earendil-works/pi
AI agent toolkit: unified LLM API, agent loop, TUI, coding agent CLI - earendil-works/pi
truefoundry/trueforge
The open-source agent harness - the runtime layer that turns an LLM into a working agent.
New capabilities for building agents on the Anthropic API | Claude
Claude now offers code execution, MCP server connections, file storage, and extended prompt caching through the API—giving developers powerful tools to build agents that analyze data, connect to external systems, and maintain context for longer periods of time.
New in Claude Managed Agents: self-hosted sandboxes and MCP tunnels | Claude
Claude Managed Agents can now operate in a sandbox you control and connect to your private Model Context Protocol (MCP) servers
Skills, forks, and self-surgery: how agent harnesses grow
Claude Code, NanoClaw, and Pi take radically different approaches to harness extensibility. The tradeoff is always safety vs. agent agency.
🔎 prime agent harness - Google Search
