# IS-AI Systems — robots.txt
# Search crawlers and answer engines are both welcome.

User-agent: *
Allow: /
Disallow: /404.html

# Answer engines / LLM crawlers — explicitly permitted (AEO).
User-agent: GPTBot
Allow: /

User-agent: OAI-SearchBot
Allow: /

User-agent: ChatGPT-User
Allow: /

User-agent: ClaudeBot
Allow: /

User-agent: Claude-SearchBot
Allow: /

User-agent: PerplexityBot
Allow: /

User-agent: Google-Extended
Allow: /

User-agent: Applebot-Extended
Allow: /

User-agent: CCBot
Allow: /

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