Changelog

All notable changes to Duckdantic will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[Unreleased]

Added

• Duck API for ergonomic duck typing with Pydantic models
• Method signature checking with MethodSpec and methods_satisfy
• ABC integration for isinstance/issubclass support
• Comprehensive trait composition with union, intersect, and minus
• Support for Pydantic v2 field aliases and validation
• Flexible type policies for customizable validation
• High-performance caching for field normalization
• Support for multiple object types (Pydantic, dataclasses, TypedDict, etc.)

Fixed

• Pydantic AliasChoices extraction for proper alias handling
• Hypothesis test generation to ensure unique field names in traits

Changed

• Improved Google-style docstrings throughout the codebase
• Enhanced error messages and detailed explanations

[0.1.0] - Initial Release

Added

• Initial implementation of structural typing for Python
• Basic trait specifications with TraitSpec and FieldSpec
• Core satisfaction checking with satisfies and explain
• Field normalization for various Python object types
• Type compatibility policies
• Trait registry for managing collections of traits