lotus-data/lotus

Based on the README, here's a technical summary: Introduces **semantic operators**—declarative transformations parameterized by natural language expressions that extend relational algebra to unstructured data, enabling operations like filtering and extraction on text/images without explicit code. Implements optimization algorithms that reduce LLM API calls through intelligent batching and caching strategies, delivering the claimed speedups while maintaining accuracy guarantees against reference implementations. Built on a Pandas-compatible API that integrates with standard Python data workflows and supports multiple LLM backends and embedding models via a configurable model abstraction layer.

1,561 stars. Actively maintained with 3 commits in the last 30 days.