Function push

src/streaming-text.ts:189–199

(chunk: string)

    return {
        push(chunk: string): string {
            if (!chunk) return '';

            rawText += chunk;
            if (!tryUnlock()) return '';

            const safeRawLength = Math.max(0, rawText.length - guardChars);
            if (safeRawLength <= 0) return '';

            return emitFromRawLength(safeRawLength);
        },

        finish(): string {
            if (!rawText) return '';