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Harness or Runtime? I Ran the Same AI Agent Both Ways

This story is from 2026-11-05. It is preserved in the archive; the latest stories are on the live feed.

I ran the same AI agent two ways on AWS, once as a Harness and once as my own code on Runtime. Both gave the right answer, and the times were close: 1.8 seconds and 2.2 seconds. The real difference is who owns the loop. Amazon Bedrock AgentCore gives you two ways to run an agent, and they look like…

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  1. 2026-11-05 16:24 · DEV Community — AI
    Harness or Runtime? I Ran the Same AI Agent Both Ways

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