Industry story
AgentCore CDK Constructs Graduate to Stable; Registry and Harness Enter Public Preview
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AWS quietly did something important here: it made AgentCore boring to deploy. CDK constructs graduating to stable means backward-compatibility guarantees for runtimes, memory, gateways, and identity — no more rebuilding infrastructure every time AWS shifts the alpha underneath you. Registry and Harness entering public preview pushes further: a centralized catalog for agent discovery and three API calls to a managed deployment target that supports Bedrock, Anthropic, OpenAI, and Gemini. The scaffolding is hardening fast; the question now is whether the agent workloads show up to run on it.
Full analysis
In May 2026, several AgentCore components reached new maturity milestones. The AWS CDK (Cloud Development Kit — infrastructure-as-code tooling) constructs for AgentCore graduated from alpha to stable in the main CDK library, giving developers backward-compatibility guarantees for defining runtimes, memory, gateways, and identity resources. Separately, AgentCore Registry — a centralized catalog for agent discovery and governance covering agents, tools, skills, and MCP servers — entered public preview, as did AgentCore Harness, a managed deployment target providing tools, memory, identity, and observability through three API calls and supporting models from Bedrock, Anthropic, OpenAI, and Gemini.
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