Cognitive Kernel-Pro is a fully open-source, free, and multi-modular agent framework for general AI agents, enabling complex reasoning, web interaction, coding, and autonomous research. This paper systematically examines the curation of high-quality training data for agent-based models, focusing on building queries, paths, and verifiable answers in four key domains: web, files, code, and general reasoning. Furthermore, we explore novel strategies for agent test-time reflection and voting to enhance agent robustness and performance. We evaluated Cognitive Kernel-Pro based on GAIA, achieving state-of-the-art results among open-source and free agents. Specifically, our 8-billion-parameter open-source model outperforms previous leading systems such as WebDancer and WebSailor, establishing a new performance standard for accessible and high-performance AI agents.