EverMind Releases Raven — an Open-Source 'Harness of Harnesses'

EverMind has released Raven, an open-source 'harness of harnesses' under the Apache 2.0 license. Raven autonomously constructs and evolves agent harnesses, while its Host Agent decomposes goals into a task graph and coordinates both built-in and external executor agents.

Compiled by Sergey KostenchukPublished 2026-10-01Updated 2026-10-01

2026-10-01 Coding Anthropic

🛠 EverMind Releases Raven — a 'Harness of Harnesses'

The open-source project (Apache 2.0, ~5k stars, pre-alpha) autonomously builds and evolves harnesses — tools, skills, and EverOS memory — tailored to a model and domain. The Host Agent breaks down goals into a task graph (DAG). It includes 4 built-in agents and presets for 13 external agents, including Claude Code and Codex. In the THRESHOLD case study, a playable FPS was built on Godot 4 in ~4 days and 42 rounds of planning, development, and verification based on a brief.

🌍 Harness engineering is shifting from manual to autonomous evolution; the reported figures (76.5% for Raven-Research on DeepResearch Mixed) are runs by EverMind itself.

👤 It can be installed with a single command: curl -fsSL https://raven.evermind.ai/install.sh | bash. THRESHOLD artifacts — website, poster, gameplay — are in the repository. Useful for those experimenting with 'model + harness' combinations and wanting a host agent over CLI agents.

Source 1: https://raven.evermind.ai/ Source 2: https://github.com/EverMind-AI/Raven

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