Cursor Builds Browser Using GPT-5.2 Agents
Cursor CEO Michael Truell said last week his company used GPT-5.2 agents to assemble FastRender, a from-scratch Rust browser rendering engine totaling about three million lines of code, running uninterrupted for a week. Developers and experts, citing an 88 percent CI job failure rate and build instability, called the project a demonstration of agentic AI producing large but unreliable codebases. The episode raises questions about AI-driven software reliability and necessary testing practices.
Scoring Rationale
Moderate novelty and relevance from an official demo; significant instability and high CI failures limit practical impact and credibility.
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