Integration failures inside AI systems rarely appear as dramatic outages. They show up as silent distortions: a schema change that shifts a downstream feature distribution, a latency bump that breaks a timing assumption, or an unexpected enum that slips through because someone pushed a small update without revalidating the contract.
The underlying services continue to report “healthy.” Dashboards stay green. Pipelines continue producing artefacts. Yet the system behaves differently because components no longer agree on the terms of cooperation. I see this pattern repeatedly across large AI programs, and it has nothing to do with model performance. It is the natural consequence of distributed teams modifying interfaces independently without enforced boundaries.