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An awesome list of Agent Harness engineering resources, including GitHub projects, tools, benchmarks, and practical guides.
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A coding agent for open models like Kimi K3
The fastest, litest AI Gateway. Rust core with Python SDK. Call 100+ LLM APIs in OpenAI (or native) format with cost tracking, guardrails, load balancing, and logging [Bedrock, Azure, OpenAI, Anthropic, OpenAI, VertexAI, vLLM, Nvidia NIM]
Open-source, community-driven agent harness
the runtime your coding agents live on
⌥ AI Coding agent for the terminal — hash-anchored edits, optimized tool harness, LSP, Python, browser, subagents, and more
The most RAM efficient harness
Open-source Agent Operating System
IronClaw is an Agent OS focused on privacy, security and extensibility
TensorZero is an open-source LLMOps platform that unifies an LLM gateway, observability, evaluation, optimization, and experimentation.
🧱 easy fast local-first microVM runtime and library
Next Generation Agentic Proxy for AI Agents and MCP servers
Laminar - open-source observability platform purpose-built for AI agents. YC S24.
A model-mediated harness for reliable agentic software development.
Open-source AI agent harness in native Rust — GUI, CLI, headless, and webapp from one binary. Multi-provider, MCP, skills, plugins, agent teams.
A desktop multi-agent harness built with Rust, Tauri, and React, powered by langgraph-rust.
Secure runtime to sandbox AI agent tasks. Run untrusted code in isolated WebAssembly environments.