The hard parts, written down.

Image API engineering guides

Fallback routing, dimension rules, and cost modeling — the operational edges that burn money or reputation when you pretend they are trivia.

How to use these guides

Resolve edge cases once — at the API boundary.

Dimensions, failover, cost, safety, and idempotency look like trivia until they double-bill or fail customers. Encode each as a rule and return enough metadata to explain what happened.

01

Normalize

Reject or adjust incompatible input before it hits a provider.

02

Classify

Separate temporary infra failure from permanent policy failure.

03

Reconcile

Compare estimated usage with provider and invoice reality.

From guide to request

Use one contract across the image route.