[eturino]

Summary

• Python 3.12+ required (breaking change from 3.6+)
• KeySetAll.len behavior change: Now raises TypeError (infinite set semantics)
• Build system modernization: Pipenv → uv, setup.py → pyproject.toml
• Performance improvements: frozenset, slots, hash

Breaking Changes

• Requires Python 3.12+
• len(KeySetAll()) now raises TypeError instead of returning 0
• Use KeySetAll.enable_compat_len(True) for opt-in compatibility mode returning sys.maxsize

Features

• __hash__ on all KeySet classes (usable as dict keys / in sets)
• __slots__ for reduced memory footprint
• frozenset internally for better performance
• match statements with exhaustive assert_never type checking
• Iterable[str] input types for more flexibility

Build & CI

• Migrate from Pipenv to uv with pyproject.toml
• CI tests on Python 3.12, 3.13, 3.14
• Replace flake8 + plugins with ruff
• Add Codecov coverage reporting (87%)
• Trusted publishing to PyPI via OIDC
• Add mise.toml for local tool versions

🤖 Generated with Claude Code

[codecov-commenter]

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