In the rapidly evolving landscape of AI-powered development tools, practitioners increasingly encounter terms like Codex, OpenClaw, MCP, A2A, Skill, and Harness. These concepts frequently appear together in discussions about AI Agents, leading to considerable confusion about their distinct roles and relationships. This comprehensive analysis clarifies these often-confused concepts within a unified framework.The Fundamental DistinctionThe Essential Takeaway: Codex functions as a specialized intelligent engineer focused on code writing, while ...