Summary

• Drop Python 3.9 support (EOL: October 2024)
• Migrate pyproject.toml to PEP 621 format

Changes

Python 3.9 removal

• Remove Python 3.9 from CI test matrix
• Update requires-python to >=3.10
• Update ruff target-version to py310

PEP 621 migration

• Move project metadata from [tool.poetry] to the [project] section
• Move dependencies to [project.dependencies]
• Move entry points to [project.entry-points]
• Move URLs to [project.urls]
• Add Python version classifiers (3.10–3.14)
• Keep only Poetry-specific settings (include) in [tool.poetry]

This resolves all Poetry deprecation warnings:

• [tool.poetry.name] is deprecated
• [tool.poetry.version] is deprecated
• [tool.poetry.description] is deprecated
• etc.

References

• Python 3.9 EOL
• PEP 621 – Storing project metadata in pyproject.toml