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AI Writes Code Faster Than Humans Can Review It, Creating a New Dev Bottleneck

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AI coding tools like GitHub Copilot, Cursor, and Claude Code can generate thousands of lines of code in minutes, but human review of that output still takes significantly longer, creating a new bottleneck in software development. This imbalance is prompting AI systems to increasingly review code written by other AI systems, raising concerns about human oversight in the development pipeline. GitHub has been expanding Copilot's code review capabilities, with experiments showing a 47% increase in developers addressing high-severity review comments when AI-assisted ensemble review was used. However, experts warn that AI can only verify code against its own interpretation of requirements, not against the actual business intent — meaning tests can pass while the underlying logic remains wrong. As AI handles more of the write-review-fix cycle, developers risk becoming the least-informed participant in a workflow they nominally approve.

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