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The “Left” in Shift-Left Moved

This Resilient Cyber newsletter post, published September 10, 2026, examines how AI is reshaping application security, including code now written by agents on developer workstations. In a July interview on the author's show, Casey says AI collapsed the cost of finding and reporting vulnerabilities, raising signal and noise roughly tenfold.

Source description, as published

AI industrialized vulnerability discovery. The code itself is now written by agents on developer workstations, and most AppSec programs have no control point there.

Inventors / authors: Chris Hughes