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Dev tools · July 23, 2026

PenguinHarness

Let Agents Autonomously Build Better Agents for $0.02

Visit site ↗Alternativestop 2% of July 2026

What it does

PenguinHarness is an open-source self-improving harness built by the team behind LlamaFactory. Its AI-native SDK enables agents to build, evaluate, and optimize other agents. It supports 1,000+ models, reusable skills, tool and context management, automatic data generation, multi-agent evaluation, and closed-loop harness evolution. With one prompt and about $0.02, an agent can build a complete RAG application.

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