Four layers of context engineering for production AI agents: How Deep Insight applies them in working code

This post presents a four-layer context engineering approach for production AI agents—architectural isolation via multi-agent design, prompt-based output control, filesystem-based context externalization, and independent verification with safeguards—illustrated through Deep Insight, an open source multi-agent data analysis solution built on the Strands Agents SDK and Amazon Bedrock AgentCore. Reported results include roughly 95 percent fewer tokens added to context per script from a combined write-and-execute tool and roughly 97 percent smaller system prompts from on-demand skill loading. It is Part 2 of a three-part series.