The heading index the generated site ships beside its pages — one JSON file, built at generate
time (packages/website/scripts/headings-index.mjs), fetched by the companion site on the
operator's FIRST search and never before. No server-side search and no index kept warm: the
console must not spend a cycle on a reader while it plays (2026-09-17-companion-site.md §4).
The heading index the generated site ships beside its pages — one JSON file, built at generate time (
packages/website/scripts/headings-index.mjs), fetched by the companion site on the operator's FIRST search and never before. No server-side search and no index kept warm: the console must not spend a cycle on a reader while it plays (2026-09-17-companion-site.md§4).