agentcore
Installation
SKILL.md
AgentCore
Build, deploy, operate, and migrate AI agents on Amazon Bedrock AgentCore. The agentcore CLI (npm @aws/agentcore) manages the full lifecycle via CDK/CloudFormation.
There are two ways to run an agent:
| Mode | What it is | When |
|---|---|---|
| Harness (default since GA, June 2026) | Declarative managed agent: harness.json = model + tools + skills + memory + limits. No agent code, no container. agentcore create --defaults creates one. |
Persona + skills + standard tools cover the need |
| Runtime (code agent) | Your code (Strands/LangChain/ADK/OpenAI/VercelAI) deployed as CodeZip or Container | Custom orchestration, custom tool logic, middleware |
Start with a harness; agentcore export harness converts it to editable Strands code later if you outgrow the config (one-way door: code, unlike config, is yours to maintain).