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

# AI Crawlers — explicitly welcome
User-agent: GPTBot
Allow: /

User-agent: ChatGPT-User
Allow: /

User-agent: Google-Extended
Allow: /

User-agent: PerplexityBot
Allow: /

User-agent: ClaudeBot
Allow: /

User-agent: anthropic-ai
Allow: /

User-agent: Gemini
Allow: /

User-agent: cohere-ai
Allow: /

User-agent: Meta-ExternalAgent
Allow: /

User-agent: Googlebot-Extended
Allow: /

User-agent: CCBot
Allow: /

# Sitemap
Sitemap: https://backtier.com/sitemap.xml

# LLM Identity Files
# Standard: https://backtier.com/llms.txt
# Deep Index: https://backtier.com/llms-full.txt