One call, from fetch to a validated object — streaming structured output without the plumbing

Automated excerpt

Then you're here: buf += decoder. decode(value, { stream: true }); for (const line of buf. split("\n")) { json += JSON. parse(payload). choices[0]. delta. content ?? No reader loop, no try/catch around JSON. parse, no provider-specific envelope code, no separate validation step. . value resolves once the stream ends, with the validated and coerced result. Awaiting . value without iterating still drains the stream; iterating without awaiting . value never leaves a dangling rejection. trickle-structured is the capstone of a small stack.

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