# Takumi Guard {#takumi-guard}

**Takumi Guard** is a package registry proxy that provides malicious package blocking and install tracking. Supports **npm**, **pnpm**, **yarn**, **pip**, **uv**, and **poetry**.

Key capabilities:

- **[Package Blocking](/docs/t/guard/features/package-blocking.md)**: Requests for packages on the blocklist are rejected with a 403 error before any code reaches your machine.
- **Download Tracking**: Records the install history of authenticated users.
- **[Breach Notifications](/docs/t/guard/features/breach-notifications.md)**: When a security advisory is published for a package you previously downloaded, you are notified so you can take action.

Takumi Guard works as a drop-in replacement for the default package registry. You can start using it with no code changes — just update your registry URL.

See [Quickstart](/docs/t/guard/quickstart/index.md) for setup instructions and [Limitations & Caveats](/docs/t/guard/limitation.md) for known constraints.