According to Anthropic (@AnthropicAI), Opus 4.6 was assigned the task of building a C compiler using coordinated agent teams, with minimal human intervention. After two weeks, the resulting compiler was able to successfully run on the Linux kernel. This experiment demonstrates the significant potential of autonomous agent-driven software development and points to a future where advanced AI systems like Opus 4.6 can independently create complex, production-level tools. The blog highlights key lessons about coordination, efficiency, and the transformative business opportunities in deploying AI agents for large-scale software engineering tasks.