Prime Agent is an open-source, self-improving coding harness designed to push the boundaries of AI-driven software development and reasoning. Built around two core abstractions—the Recursive Language Model (RLM) and the Continual Harness—Prime Agent possesses the unique ability to refine its own harness over time.
Demonstrating elite performance on complex reasoning tasks, Prime Agent paired with advanced models achieves a remarkable 95.5% on ARC-AGI-3, actively surpassing reported human expert baselines. As an open-source tool targeted at developers and AI researchers, it bridges the gap between static LLM setups and dynamic, self-optimizing developer ecosystems.
Prime Agent is an open-source, self-improving coding agent and harness built around the Recursive Language Model (RLM) and Continual Harness abstractions.
Yes, Prime Agent is available as an open-source developer tool with code accessible via GitHub.
When paired with advanced models like Opus 5, Prime Agent achieves 95.5% on ARC-AGI-3, surpassing the reported human expert baseline.

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