agent-skills

Prefer composition and interfaces over class inheritance to reduce coupling and survive change - model has-a relationships, abstract through interfaces/contracts rather than parent classes, and reserve inheritance for the narrow cases where it fits. Use when designing or refactoring class hierarchies, reviewing OOP code, deciding between extending a class and composing one, or when the user mentions inheritance, subclassing, base classes, or composition.

Write consistent Python docstrings using reST roles for cross-references. Use when writing or updating docstrings, documenting Python code, or when the user mentions docstrings, reST, Sphinx, or API documentation.

Maintain CHANGELOG.md in Keep a Changelog format by updating Unreleased and version sections with user-relevant changes.