Agent Architecture

The rapid growth of AI agents—autonomous systems that perceive, decide, and act with minimal human intervention—has created a need for shared engineering vocabulary and architectural best practices. As companies and developers move beyond single-turn language models to deploy agents that operate continuously in production, questions about how to structure, scaffold, and harness these systems have become increasingly important. This cluster explores the fundamental engineering challenges and design patterns emerging at the frontier of agent development.

Key to this emerging field is the distinction between different conceptual frameworks and terminology. Terms like "harness" and "scaffold" capture different approaches to constraining and guiding agent behavior—whether through external controls, internal structure, or hybrid combinations. Getting this language right matters because it shapes how teams communicate about tradeoffs, how researchers build on each other's work, and how the industry converges on standards. As various "agent stacks" proliferate—different combinations of language models, planning frameworks, memory systems, and tool integrations—the need for clarity about what we're building and why becomes urgent.

Long-running agents present distinct engineering challenges compared to single-interaction systems. Issues like memory management, error recovery, drift over time, and resource constraints demand careful architectural thinking. Teams are actively experimenting with different approaches to reliability, observability, and safety in continuous agent deployments. This cluster brings together articles examining both the high-level strategic bets companies are making on agent infrastructure and the granular engineering decisions required to make those bets pay off. The conversation reflects a field in transition from experimentation to production, where shared mental models and clear terminology are becoming competitive advantages.