How would you encapsulate a model provider inside an application?

Creates a task-oriented model boundary that normalizes application outcomes without erasing useful provider capabilities.

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TL;DR

I keep provider SDK types behind an infrastructure adapter and expose task-oriented application operations such as classify, extract, or generate a supported answer. The boundary accepts application inputs and returns typed outcomes including success, refusal, incomplete output, validation failure, throttling, and timeout. Provider request IDs, usage, and finish details remain available for diagnostics without leaking through every caller.

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Interface design, provider error mapping, feature exposure, and maintainable integration boundaries.

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Core answer
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Overview
A provider SDK is an infrastructure detail, but a universal lowest-common-denominator interface is also a trap.
I keep provider SDK types behind an infrastructure adapter and expose task-oriented application operations such as classify, extract, or generate a supported answer. The boundary accepts application inputs and returns typed outcomes including success, refusal, incomplete output, validation failure, throttling, and timeout. Provider request IDs, usage, and finish details remain available for diagnostics without leaking through every caller.
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Stronger answer
Optional upgrade with examples, trade-offs, and sharper phrasing.
Shared concerns such as credentials, model identifiers, timeouts, retries, tracing, and cost accounting live in the adapter or a deliberate gateway. Task-specific configuration stays near the use case instead of becoming one giant generic generate method with dozens of optional parameters. Contract tests use captured or provider test responses to verify error mapping and streaming behavior.

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Common mistakesCandidateCommon mistakesMistakes that weaken the answer or signal shallow understanding.Open details

Details

Returning provider response objects from domain services.
Creating one generic interface with every provider option.
Discarding request IDs and usage metadata.

How would you encapsulate a model provider inside an application?

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