Harness2 is a plug-and-play framework for recursive agent harnessing from Google Research. A harness is the system around a model that lets it act as an agent: prompts, tools, memory, skills and orchestration. Harness2 is built for an open world where agents meet tasks unseen during harness design, and it ships benchmark guides including JobBench.
Be the first to rate Harness2. Your feedback helps other users decide.
Treat prompts, tools and memory as tunable parts of one system instead of fixing them by hand.
Let a harness be applied to itself and measure whether the second level helps.
Run the bundled JobBench setup to compare harness variants under the same conditions.
Similar tools in the same category — compare side-by-side
KiviDB is a fast, multi-threaded Redis and Valkey alternative written in Rust. It is drop-in compati...
Maxwell is described by doubleAI as the first code execution model: it improves code while it runs, ...
Jevals runs agent evals and guardrails as Jev decisions: one request per trace, at a fraction of a c...
Guides and comparisons about code tools
Eight Show HN projects that check what an agent actually built: runtime verdicts, agent onboarding audits, semantic review and in-loop evaluation.

Compare Cursor, GitHub Copilot and Devin to find the best AI coding assistant. Learn how each fits different developer workflows, plus Cody and Codeium.
Build mobile apps faster with 7 AI code tools in 2026. From AI-assisted coding and UI generation to automated testing and deployment.
Discover the best AI code tools for DevOps engineers in 2026. Infrastructure as code, CI/CD optimization, monitoring and incident response compared.
AI coding assistants are transforming software development. Should developers be worried? An honest look at what AI changes and what it cannot replace.