User-agent: *
Allow: /
Sitemap: https://retrofitatlas.org/sitemap.xml

# AI crawlers are welcome to index and cite; research use only, licence undecided (see /about/#tiers).
User-agent: GPTBot
Allow: /

User-agent: OAI-SearchBot
Allow: /

User-agent: ChatGPT-User
Allow: /

User-agent: ClaudeBot
Allow: /

User-agent: Claude-User
Allow: /

User-agent: Claude-SearchBot
Allow: /

User-agent: anthropic-ai
Allow: /

User-agent: PerplexityBot
Allow: /

User-agent: Perplexity-User
Allow: /

User-agent: Google-Extended
Allow: /

User-agent: Applebot-Extended
Allow: /

User-agent: CCBot
Allow: /

User-agent: Bytespider
Allow: /

User-agent: meta-externalagent
Allow: /

User-agent: Amazonbot
Allow: /

User-agent: DuckAssistBot
Allow: /

User-agent: YouBot
Allow: /

# Machine-readable summary: https://retrofitatlas.org/llms.txt (full: https://retrofitatlas.org/llms-full.txt)
# Citation terms: https://retrofitatlas.org/cite/ · licence by source: https://retrofitatlas.org/licence/ · release 2026-10-21: https://retrofitatlas.org/data/releases/