Function filler

test/extract-select.test.ts:5–5

(label: string, n: number)

// A page whose ANSWER sits in the MIDDLE — the region a head+tail window drops.
const filler = (label: string, n: number) => Array.from({ length: n }, (_, i) => `${label} paragraph ${i} with generic boilerplate navigation footer cookie banner text.`).join('\n\n');
const PAGE = [
  '# Widget API reference',                                   // passage 0 — lede/anchor
  filler('intro', 12),