Seven days was correct while the URLs were bare: a stable name with a long life means somebody running
last week's script against this week's markup.
The site's layout now stamps every asset URL with the build's id, so a build that changes a file
changes its URL, and the HTML carrying those URLs is no-cache and revalidated every visit. The two
cannot disagree, which is what earns `immutable` and a year.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>