Claude Code steganographic request marking discovered
Claude Code Is Steganographically Marking Requests
8 experts across 4 network communities independently surfaced this.
8 experts
4 communities
1 sources clustered
Mark Riedl
Stella Biderman
Suresh Venkatasubramanian
Djamé 🟥
Marcel Bollmann
Kevin S. Xu
Veni Kunche
Vikram Saraph
“Evidence that Anthropic is using prompt stenography to track whether Claude Code is being used by certain labs and certain web domains thereallo.dev/blog/claude-...”
“Claude code is stenographically marking location information in its prompt to help Anthropic profile users by where they (appear to) be located thereallo.dev/blog/claude-...”