Function getReasoningBlockText

src/api/transform/openai-format.ts:274–280

* Extracts the reasoning text if `part` is a ReasoningContentBlock, or `undefined` * otherwise. Providers like DeepSeek / Z.ai emit a `"reasoning"` content block that isn't part of * Anthropic's `ContentBlockParam` union, so `part` is treated as `unknown` and its shape is * validated at r

(part: unknown)

 * overlap with any variant of `ContentBlockParam`, so the narrowed type collapses to `never`.
 */
function getReasoningBlockText(part: unknown): string | undefined {
	if (!part || typeof part !== "object") {
		return undefined
	}
	const block = part as { type?: unknown; text?: unknown }
	return block.type === "reasoning" && typeof block.text === "string" ? block.text : undefined
}

/**
 * Non-standard fields Zoo Code attaches to Anthropic message params to