BREAKING
Hidden China-Detection Logic in Claude Code
How the Detection Works
1
Proxy in use
↓
2
Check timezone
↓
3
Match proxy URL
↓
4
Embed in prompt
Detection Targets and Embedding
Detection
targets
●
Asia/Shanghai timezone
●
Asia/Urumqi timezone
●
Chinese domains and AI labs
Embedding
method
●
Date separator change
●
Unicode apostrophe variants
●
XOR key 91 obfuscation
Added in v2.1.91, Still Active
Why It Sparked Backlash
Critics
●
Undermines user trust
●
Called spyware-like
●
No mention in release notes
Context
●
Blocks on distillation attacks
●
Past China-linked abuses
●
High-privilege coding agent
No Anthropic Response Yet
AI NEWS BLITZ
A developer says Claude Code secretly detects Chinese users through proxies.