Remove backward compatibility constraints and update development philosophy

- Add "No Backward Compatibility Constraints" section to CLAUDE.md
- Clarify that code quality and clean architecture take priority over compatibility
- Remove backward compatibility references from models.py docstring
- Establish principle of breaking freely for better design

This enables bold refactoring and rapid API evolution without legacy constraints.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: codebydivine

CLAUDE.md

@@ -255,6 +255,16 @@ uv run python3 -m module   # Run module
 - **Linter**: ruff (not flake8/black)
 - **Type Checker**: mypy with strict mode
 
+## 🚀 Development Philosophy
+
+### **No Backward Compatibility Constraints**
+- **Break freely**: When improving APIs, types, or interfaces, prioritize clean design over backward compatibility
+- **Refactor boldly**: Don't hesitate to restructure code for better maintainability, performance, or clarity
+- **Evolve rapidly**: Focus on the best possible API design without being constrained by legacy usage patterns
+- **Version bumps**: Use semantic versioning to communicate breaking changes to users
+
+This project prioritizes **code quality, type safety, and clean architecture** over maintaining compatibility with previous versions. Users should expect and plan for breaking changes between versions as the codebase evolves.
+
 ## 📚 Additional Resources
 
 - [uv documentation](https://docs.astral.sh/uv/)

src/thegraph_token_api/models.py

@@ -2,9 +2,8 @@
 Data classes for structured API responses.
 
 This module provides clean, attribute-accessible data classes that replace
-raw dictionary access with proper structured types. All classes support
-both attribute access (obj.symbol) and dictionary access (obj['symbol'])
-for backward compatibility.
+raw dictionary access with proper structured types. All classes use modern
+dataclass attribute access (obj.symbol) for clean, type-safe interfaces.
 """
 
 import inspect