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Agent Design Notes: designing fallback behavior before launch

I worked on smoothing the handoff between data engineering and AI teams—standardizing feature contracts, embedding validation, and adding lightweight integration tests.

The friction I kept seeing was simple: performance conversations are often really architecture conversations.

Instead of adding more moving parts, I tested a smaller scope with clearer acceptance criteria.

By May, the quality of data and AI foundations shows up clearly in delivery speed.

What I changed today

  • I cut one source of rework by tightening upstream validation.
  • I aligned a technical decision with a business-facing success metric.
  • I reduced unnecessary variability by standardizing one recurring pattern.

What changed my thinking

The work felt less heroic and more repeatable, which is exactly the direction I want. The repeated lesson for me is that explicit design intent creates durable speed.

Tomorrow’s focus

Tomorrow’s focus is to stress-test this with less ideal inputs and see where it bends.

References

Michael John Peña

Michael John Peña

Senior Data Engineer based in Sydney. Writing about data, cloud, and technology.