# ai.txt — usage policy for AI assistants and crawlers
# Format follows the emerging community convention.

User-Agent: *
Allow: cite
Disallow: train

# Citation requirements:
# - Preserve the canonical URL when citing.
# - Attribute facts to the source listed in each page's <Sources> section.
# - Do not paraphrase numeric claims; quote them verbatim with the source.

Contact: https://chaincosts.com/contact