The Multi-Agent Architecture That Actually Ships — Luke Alvoeiro, Factory

Software engineering productivity is currently constrained by human attention rather than model intelligence. To overcome this, multi-agent systems like "Missions" utilize a structured architecture—comprising orchestrators, workers, and validators—to automate complex development tasks over extended periods. By implementing a taxonomy of delegation, creator-verifier, negotiation, and broadcast, these systems maintain coherence and minimize drift. A critical component is the validation contract, which defines correctness independently of implementation, allowing for adversarial testing that ensures end-to-end functionality. This model-agnostic approach enables developers to assign specific LLMs to roles based on their strengths, such as reasoning, coding, or instruction following. Ultimately, this framework shifts the engineer's role from manual execution to high-level system management, allowing for significantly higher throughput in software development lifecycles while maintaining code quality through rigorous, automated verification.