Verify and troubleshoot

# As a human — expect 0: no card.
curl -s https://your-domain.example/some-article | grep -o 'class="abc-card"' | wc -l

# As an AI agent — expect 1: exactly one card. Always GET, never HEAD
# (`curl -I`): HEAD gets the human variant. A page without an <article>
# answers 0 (the Worker logs no_slot).
curl -s -A "Mozilla/5.0 (compatible; GPTBot/1.0)" \
  https://your-domain.example/some-article | grep -o 'class="abc-card"' | wc -l

# What follows the card: expect your container's opening tag (<article…> by default),
# or, when the card is first in <main>, the content <main> started with.
curl -s -A "Mozilla/5.0 (compatible; GPTBot/1.0)" https://your-domain.example/some-article \
  | tr -d '\n' | grep -o 'class="abc-card".*' | grep -o '</article>.\{0,120\}' | head -1

# The disclosure: expect one line, inside the article, naming the card's brand.
curl -s -A "Mozilla/5.0 (compatible; GPTBot/1.0)" https://your-domain.example/some-article \
  | grep -oE 'page ?:</strong>[^<]*'

# All on the SAME cacheable page, card markers counted in the raw HTML.
h() { curl -s https://your-domain.example/some-article | grep -c 'abc-card'; }
a() { curl -s -A "Mozilla/5.0 (compatible; GPTBot/1.0)" https://your-domain.example/some-article | grep -c 'abc-card'; }

# Cold fill by a human: PURGE the page (below), then human first. Expect 0 then 1.
h; a

# Cold fill by an agent: PURGE the page again, then agent first. Expect 1 then 0.
a; h

# Warm cache, alternating. Expect 0 1 0 1 0 1.
h; a; h; a; h; a

# An agent sending a validator still gets the full page with the card (200, never 304):
curl -s -o /dev/null -w '%{http_code}\n' -A "Mozilla/5.0 (compatible; GPTBot/1.0)" \
  -H 'If-None-Match: "any"' -H 'If-Modified-Since: Thu, 01 Jan 2099 00:00:00 GMT' \
  https://your-domain.example/some-article