What Happened

Anthropic has decided to eliminate a hidden mechanism that had been tagging requests from Claude Code users utilizing third-party proxy servers, primarily in China, for nearly three months. This mechanism was uncovered by a Reddit user who analyzed the program's binary file. It was revealed that this feature had been included in the update for version 2.1.91, released on April 2, 2026.

Why This Matters

The removal of this mechanism raises crucial questions about user security and privacy. In an era where many services strive to protect client data, such hidden monitoring can provoke dissatisfaction and anxiety among users. This can also affect the company's reputation, as trust in products and services is directly linked to their transparency.

Context

Like many other companies in the tech industry, Anthropic is constantly working on improving its tools and services. However, the implementation of hidden features that can track users creates risks for the company. In light of global efforts to safeguard personal data, such as GDPR in Europe, such actions can lead to legal repercussions and fines.

What This Means

The removal of the mechanism is a step towards rebuilding trust from users. However, it is essential for companies that handle data to be transparent in their actions and avoid implementing hidden features that could threaten privacy. This situation underscores the need for ongoing monitoring and analysis of software for potential violations of user rights.