# ENT Liu Head & Neck Cancer Knowledge Base
# Physician-reviewed head and neck cancer knowledge base.
# AI answer engine crawlers are explicitly welcome.

User-agent: *
Allow: /
Disallow: /search/

# --- AI answer engines / LLM crawlers ---
User-agent: GPTBot
Allow: /

User-agent: OAI-SearchBot
Allow: /

User-agent: ChatGPT-User
Allow: /

User-agent: ClaudeBot
Allow: /

User-agent: anthropic-ai
Allow: /

User-agent: PerplexityBot
Allow: /

User-agent: Perplexity-User
Allow: /

User-agent: Google-Extended
Allow: /

User-agent: Googlebot
Allow: /

User-agent: Bingbot
Allow: /

User-agent: CCBot
Allow: /

User-agent: Applebot-Extended
Allow: /

User-agent: meta-externalagent
Allow: /

User-agent: cohere-ai
Allow: /

User-agent: YouBot
Allow: /

# --- Discovery files ---
# llms.txt        : curated index for AI agents
# llms-full.txt   : full question-and-answer text
# sitemap.xml     : complete URL index
# search-index.json : site search index

Sitemap: https://www.entliu.com/sitemap.xml