Cracking the Bedrock, Reaching the Core: Building Agents with AWS AgentCore Runtime and Memory

This article walks through a project I built on Amazon Bedrock AgentCore: an agent that turns campaign briefings into ranked email subject lines, and improves across sessions as it learns from the user. The goal here isn’t to cover every AgentCore primitive, but to show how a few of them (Runtime and Memory) fit together in a real loop, and to be honest about which ones I deliberately left out. The project itself is intentionally small. The interesting part is the architecture around it: where s