# robots.txt — AI-access terms for this site (Customer Zero demo)
#
# This site is written by a human and read by both humans and agents.
# It states its terms up front instead of blocking on sight.
#
# Terms for automated / AI clients:
#   - Crawling for indexing that sends readers back here: welcome, no charge.
#   - Extract-and-leave reads (agents that consume content without returning
#     a visitor): allowed on the free articles; the /premium/ path is paid.
#   - Please identify yourself with a real User-Agent and a contact.
#   - Be polite: max ~1 request/second. Back off on 429/402.
#   - The /premium/ path is metered. In this demo it answers HTTP 402
#     (Payment Required) to unpaid clients — pay-per-use, not a flat toll.

# Human search crawlers — full access, please send readers back.
User-agent: *
Allow: /
Disallow: /premium/

# Premium content is paid access, not blocked.
# Unpaid requests to /premium/ receive HTTP 402 (Payment Required).