Shipping AI Infra: Interfaces Before Optimization

A recurring lesson from infrastructure work: teams often jump to throughput and benchmark tuning before alignment on interfaces.

For retrieval and indexing systems, that order usually backfires.

The highest-leverage sequence is:

1. Define clear producer/consumer contracts
2. Make rollout states and ownership explicit
3. Add observability around data quality and failure modes
4. Then optimize performance hotspots

Why this works: once interfaces are stable, every optimization compounds. Without stable interfaces, each optimization can be invalidated by upstream changes.

Fast systems are useful. Predictable systems get adopted.