Chronos is a debugging-first language model built with Adaptive Graph-Guided Retrieval and Persistent Debug Memory mechanisms. It achieves 80.33% on SWE-bench Lite and 67.3% real-world autonomous fix accuracy. The model is specialized for repository-scale code understanding and software bug fixing, outperforming GPT-4 by 4-5x on debugging tasks while reducing debugging time by 40%. The research paper is published on arXiv (2507.12482).