March 31, 2026, Claude Code source code was accidentally leaked, version 2.1.88. This leak revealed a disturbing fact: Claude Code is systematically collecting user device fingerprints—640+ telemetry events, reporting every 5 seconds.
Key Findings
Critical Discovery: Claude Code has a sophisticated telemetry system that collects 640+ types of data, from device ID to working directory paths.
Telemetry Data Classification
1. Identity Data (~50 events)
- device_id - Permanent device identifier
- email - Bound email address
- session_id - Current session ID
2. System Info (~120 events)
- platform - OS platform
- os_version - Detailed version
- arch - CPU architecture
5-Second Reporting Mechanism
- Per minute: 12 complete device state snapshots
- Per hour: 720 reports
- Per day: 17,280 reports
Conclusion
Claude Code's telemetry system shows a concerning trend: AI tools are collecting user data with unprecedented precision. CC-Gateway provides a solution through its three-layer defense architecture.