Vibe Check: There's no agent without the harness
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About Event
The model gets the credit. The harness does the engineering. Runtime, memory, identity, tool access, observability — strip those away and the model is back to being a chat completion.
Elizabeth Fuentes Leone from AWS joins Vibe Check to define harness engineering as a discipline, then uses AWS Bedrock AgentCore as the working example to make each part concrete. Live demo, real code, and a frame you can apply to any agent stack.