Provides a reusable caching layer with TTL support using Parquet format for efficient data storage. The ScreenerCache implementation demonstrates smart cache invalidation strategies and separation of concerns, making it easy to extract and use in other data-intensive applications. It handles different data types with appropriate TTL values and provides a clean interface for cache operations.

Implements a deterministic pre-computation pipeline for financial metrics to prevent LLM hallucination in calculations. This component solves a critical problem in LLM-assisted financial analysis by computing key values (like penetration return rates) upfront using reliable algorithms, then making them available to LLMs for interpretation rather than calculation. The pattern is broadly applicable to any system where LLMs need to reason about precise numerical values.

Provides a well-structured approach to API client design using mixin patterns to separate concerns. The TushareClient is built from focused mixins (InfrastructureMixin, YFinanceMixin, FinancialsMixin, etc.) that each handle specific responsibilities. This modular design makes it easy to extend, test, and maintain, and the pattern can be adapted to other API clients beyond Tushare.