Why it matters

Partial output shapes streaming reliability. Users may cancel or disconnect.

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The architecture

Buffer partial output.

Save checkpoints.

Resume from checkpoint if supported.

Partial output handlingBufferaccumulate tokensCheckpointsave stateResumeor discardNot all LLMs support resume; be prepared to discard or retry
Partial output flow.
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How it works end to end

Buffer strategy: memory + occasional persist.

Cancel: return partial to user + log.

Retry: from beginning if resume unsupported.