kreuzberg-dev/.remote-cache/kreuzberg-shared-rules/.ai-rulez/skills/python-modern-performance-standards
.remote-cache/kreuzberg-shared-rules/.ai-rulez/skills/python-modern-performance-standards/SKILL.md
______________________________________________________________________ ## priority: critical # Python Modern & Performance Standards **Python 3.10+ · Functional-first · msgspec · Fully async · Strongest typing** - Target Python 3.10+; match/case, union types (X | Y), structural pattern matching - msgspec ONLY (NEVER pydantic); msgspec.Struct with slots=True, kw_only=True, frozen=True - Full type hints: ParamSpec for decorators, TypeVar/Generic[T], Protocol for structural typing - Enable mypy
$ install --global
skillsauthnpx skillsauth add kreuzberg-dev/html-to-markdown .remote-cache/kreuzberg-shared-rules/.ai-rulez/skills/python-modern-performance-standardsInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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SKILL.md
priority: critical
Python Modern & Performance Standards
Python 3.10+ · Functional-first · msgspec · Fully async · Strongest typing
- Target Python 3.10+; match/case, union types (X | Y), structural pattern matching
- msgspec ONLY (NEVER pydantic); msgspec.Struct with slots=True, kw_only=True, frozen=True
- Full type hints: ParamSpec for decorators, TypeVar/Generic[T], Protocol for structural typing
- Enable mypy --strict --warn-unreachable --disallow-any-expr; never use Any
- Functional patterns: pure functions, composition, map/filter/reduce, immutability
- Walrus operator := in comprehensions; match/case for conditionals
- contextlib.suppress for intentional exception suppression
- O(1) optimization: dict/set lookups over if/elif chains
- Fully async: anyio.Path (not pathlib), httpx AsyncClient, asyncpg, asyncio.gather
- Function-based tests ONLY (*_test.py); pytest fixtures, 95% coverage, real PostgreSQL
- Never: class tests, pydantic, sync I/O in async, Any type, Optional[T] (use T | None)
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