Feature request: A native Rust replacement for Deptry

[christianledermann-arch]

Problem

There is currently no native Rust tool in the Astral ecosystem for detecting missing, unused, and transitive Python dependencies.

Deptry fills this gap today.

Proposed solution

Add a new tool to the Astral ecosystem that provides Deptry-equivalent functionality for static dependency analysis.

Rather than reimplementing the underlying analysis, the tool should compose the existing Astral crates responsible for parsing Python source, discovering imports, resolving modules, and semantic analysis where appropriate (including the ty crates if they are a good fit).

The goal would be to provide a fast, native Rust alternative to Deptry that shares infrastructure with the rest of the Astral ecosystem instead of maintaining a separate Python implementation.

Motivation

A native implementation would:

• provide a high-performance replacement for Deptry;
• reuse the existing Rust infrastructure already maintained by Astral;
• reduce duplicated implementations of Python analysis logic;
• fit naturally alongside Ruff and uv as another Python developer tool.

[MichaReiser]

It's something we'd like to build. See #10015