ChengYoung

Privacy & data

Zero usage data collection; everything stays on your machine; the three network scenarios, spelled out.

Zero usage data collection

This product collects and uploads no usage data: the installer contains no telemetry code, nothing is sent to any analytics service at runtime, and no device identifier is generated. This is not a setting — it is the product's default and only behavior.

What stays on your machine

All of your data lives locally (data directory: %APPDATA%\ChengYoung; upgrading from an older version migrates it automatically):

  • Conversations and session history;
  • App settings and preferences;
  • Downloaded model files;
  • Extension and workflow configuration.

Model provider API keys are stored in the OS credential manager (Windows Credential Manager / macOS Keychain), never in plaintext files.

The three network scenarios

Apart from the following, the app initiates no network requests:

  1. Model downloads: on-demand from Hugging Face or ModelScope, one-time, stored locally;
  1. Update checks: queried from GitHub (manual check available in Settings);
  1. Your own cloud provider: only if you configure a cloud provider will conversation data be sent to that provider (governed by its privacy policy); this scenario does not exist when using local models.

Cleanup & exit

  • Sessions can be deleted individually or in bulk;
  • Deleting the data directory erases all local data completely;
  • Uninstalling sends data to no one.

Further reading

This page is adapted from upstream open-source documentation (Apache-2.0) with modifications; see /legal/provenance for sources and changes.