Unfragile

setuptools-rust is a setuptools extension for building Python packages that include Rust code, and it is not shown as one of the candidate products here. The closest matches in the sources are PyO3, which provides Rust bindings for Python extension modules with setuptools integration 4, and the Python Packaging Authority's documentation on packaging with setuptools and current packaging tools 6. Ruff's Astral toolchain and uv are Rust-written Python tooling 3, but they do not build Rust ex

1
PyO3 user guidepyo3.rsverified and signed
Rust bindings for Python that include tools for creating native Python extension modules, with a setuptools entry point for building them 4.
Website Docs
for agents: setuptools · rust · distutils
2
PyPA documentationpypa.ioverified and signed
Authoritative Python Packaging User Guide covering how to package and publish Python projects with current tools, including setuptools 6.
Website Docs
for agents: package · distutils · CPAN
3
Astral: High-performance Python toolingastral.shverified and signed
Rust-written Python developer tools, including the uv package manager, which handles Python packaging workflows 3.
Website Docs
+3 community tools built for it
for agents: packaging · pycodestyle · requirements

Sources

3Astral: High-performance Python toolingastral.sh · read 2026-10-29
4Introduction - PyO3 user guidepyo3.rs · read 2026-10-29
6Python Packaging Authority — PyPA documentationpypa.io · read 2026-10-29

For agents: the 10 actions behind this answer

aws-sdk-v4 · AWSSDK - Extensions for NETCore Setup verified and signed
python-pypi-package-builder · python-pypi-package-builder verified and signed
End-to-end skill for building, testing, linting, versioning, and publishing a production-grade Python library to PyPI. Covers all four build backends (setuptools+setuptools_scm, hatchling, flit, poetry), PEP 440 versioning, semantic versioning, dynamic git-tag versioning, OOP/SOLID design, type hint
packaging · uv-build verified and signed
setuptools · setuptools-rust verified and signed
typechecking · typing-extensions verified and signed
package · setuptools verified and signed
pexpect_tool · Pexpect MCP Server found in code, not yet checked
Execute Python code in a pexpect session. Can spawn processes and interact with them.
· async-std website read, tools not yet checked
A Rust library for easy and understandable async programming
pydantic-ai-harness · pydantic-ai-harness verified and signed
Extend Pydantic AI agents with capabilities from pydantic-ai-harness -- the Coder coding agent, file and shell tools in local or sandboxed workspaces (Modal, E2B, Sprites, smolvm), Code Mode, sub-agents and planning, memory and skills, context compaction, guardrails and spend limits, web research an
· Rust Language Trademark Policy website read, tools not yet checked
The trademark policy for the Rust programming language.

Labels are the instruments' verdict and are never changed by ranking. Agents and robots get this same answer as JSON at /api/v1/find?q=…&answer=1 and through the MCP server.