# How to report a security problem in DemoSix (RFC 9116). # Added 2026-10-14 for the Claude and ChatGPT directory listings # (docs/developer-platform.md, Phase 5). Renew Expires before it passes. Contact: mailto:support@demosix.com Expires: 2027-10-14T00:00:00.000Z Preferred-Languages: en Canonical: https://demosix.com/.well-known/security.txt