Harness Hub
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Engineer

Ryan Lopopolo

Principal Engineer, Google Cloud (prev OpenAI); creator of Artichoke Ruby

Codex & OpenAI agents

Engineer behind the Feb 2026 OpenAI post "Harness engineering: leveraging Codex in an agent-first world", one of the texts that named the discipline, written while at OpenAI. He now works on agentic GCP at Google Cloud and created Artichoke Ruby.

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In research (1)

Sources

  1. github.com/lopopolo
  2. hyperbo.la
  3. openai.com/index/harness-engineering
  4. latent.space/p/harness-eng

Verified Oct 29, 2026