# universal-anti-patterns

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- Author: Na'aman Hirschfeld
- Repository: kreuzberg-dev/ai-rulez
- Version: 20260102103410
- Stars: 0
- Forks: 0
- Last Updated: 2026-02-07
- Source: https://github.com/kreuzberg-dev/ai-rulez
- Web: https://mule.run/skillshub/@@kreuzberg-dev/ai-rulez~universal-anti-patterns:20260102103410

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## priority: critical

# Universal Anti-Patterns

**Never use:**

- Any type (Python, TypeScript) - use Unknown/generics
- Class-based tests (Python) - function-based only
- Mocking internal services (any language) - use real objects
- Manual dependency management - use lock files
- Blocking I/O in async code (Python/TypeScript) - fully async paths
- Bare exception handlers - catch specific types only
- Magic numbers - extract to named constants
- Inheritance for code reuse - prefer composition
- Global state - dependency injection
- f-strings in logging - structured key=value logging