Why AI Coding Tools Are Exposing What Senior Developer Skills Really Were

A software engineering essay argues that traits long used to identify senior developers — such as typing speed, framework recall, and debugger fluency — were always proxies for deeper judgment, not the core skill itself. With AI agents now handling syntax generation and library lookup at near-zero cost, those proxies have lost their signal value. The author contends that what organizations were actually paying for was a developer's ability to question requirements, identify correct system boundaries, and evaluate whether abstractions would age well. These judgment-based skills were rarely visible in code commits but showed up years later in the absence of costly architectural mistakes. The shift to agentic workflows has made this distinction impossible to ignore, forcing the industry to reconsider how seniority is defined and compensated.