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Continual Harness

2 articles · Page 1 of 1

Sep 9, 2026 · Artificial Intelligence

YC Debunks 'Model-Only' Myth: Harness, Not Model, Sets Agent Ceiling

YC Paper Club reveals how the same Claude Opus model scores 30% on ARC-AGI bare but reaches 95% with proper Harness, and NVIDIA's AVO hits 100%, proving agent runtime—not model weights—determines the performance ceiling.

ARC-AGIAgent RuntimeContinual Harness

0 likes · 20 min read

YC Debunks 'Model-Only' Myth: Harness, Not Model, Sets Agent Ceiling

AI Step-by-Step

Aug 23, 2026 · Artificial Intelligence

Prime Agent: Self-Evolving AI Coding Agent That Builds Its Own Harness

Prime Agent is an open-source coding agent that eliminates manual harness writing by using a persistent IPython environment, recursive language model, and continual harness to self-improve, spawn parallel subagents, and execute long-term goals autonomously while reducing token usage.

AI coding agentContinual HarnessPrime Agent

0 likes · 6 min read

Prime Agent: Self-Evolving AI Coding Agent That Builds Its Own Harness