Code that passes every test can still break the next AI agent that touches it

The New Stack · 2 months ago · 25

Google promoted Go as a language that gives AI coding agents guardrails by relying on a small syntax, static typing, and integrated tooling, while noting that these checks still can’t verify correct business logic or data access. A June 2026 study analyzed 278,790 inline review conversations and found human reviewers required 11.8% more review rounds for agent-written code than for human-written code. As a result, even code that passes tests can still break the next AI agent’s work, shifting more maintenance and review burden to human developers.