Coding agents like Claude Code, Codex, and Cursor are redefining software development, shifting engineers into a managerial role orchestrating intelligent systems. The race is on for startups to master context management and leverage bottom-up distribution, radically altering how products gain market traction and forcing enterprises to rethink their entire development strategy. This isn't just a technological upgrade; it's a fundamental restructuring of the competitive landscape, demanding that founders adapt or risk being outmaneuvered.