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v1.4.9.8

HKUDS/LightRAGv1.4.9.8Nov 6, 2025by danielaskdd

AI Summary

This release adds PDF decryption support for password-protected files, Langfuse observability integration, RAGAS evaluation framework, and native Gemini LLM support.

Key Highlights

  • PDF decryption support for password-protected files
  • Langfuse observability integration
  • RAGAS evaluation framework for RAG quality assessment
  • Native Gemini LLM support
  • Performance bottleneck fix in document deletion

New Features

  • PDF password-protected file decryption
  • Langfuse observability integration
  • RAGAS evaluation framework
  • Native Gemini LLM support
  • Document deletion performance optimization

Full Release Notes

## What's New
* Feat: Add PDF Decryption Support for Password-Protected Files by @danielaskdd in https://github.com/HKUDS/LightRAG/pull/2296
* Feat: Add optional Langfuse observability integration by @anouar-bm in https://github.com/HKUDS/LightRAG/pull/2298
* Feat: Add RAGAS evaluation framework for RAG quality assessment by @anouar-bm in https://github.com/HKUDS/LightRAG/pull/2297
* Feat: Add native gemini LLM support by @Humphryshikunzi in https://github.com/HKUDS/LightRAG/pull/2305

## What's Changed
* Refact: Auto-refresh of Popular Labels When Pipeline Completes by @danielaskdd in https://github.com/HKUDS/LightRAG/pull/2291
* Fix empty context validation bug and improve naming consistency in query context building by @danielaskdd in https://github.com/HKUDS/LightRAG/pull/2295
* Refact: Enhanced RAG Evaluation CLI with Two-Stage Pipeline and Improved UX by @danielaskdd in https://github.com/HKUDS/LightRAG/pull/2311
* Refact: Separate Configuration of RAGAS for LLM and Embeddings by @danielaskdd in https://github.com/HKUDS/LightRAG/pull/2314
* Refactor: Remove Deprecated Chunk-Based Query Methods and Improve Graph Unit Test by @danielaskdd in https://github.com/HKUDS/LightRAG/pull/2319
* Fix node retrieval fail with special characters in IDs for Postgres AGE GraphStorage by @danielaskdd in https://github.com/HKUDS/LightRAG/pull/2320
* **Fix performance bottleneck in document deletion** by @danielaskdd in https://github.com/HKUDS/LightRAG/pull/2321

## New Contributors
* @anouar-bm made their first contribution in https://github.com/HKUDS/LightRAG/pull/2298
* @Humphryshikunzi made their first contribution in https://github.com/HKUDS/LightRAG/pull/2305

**Full Changelog**: https://github.com/HKUDS/LightRAG/compare/v1.4.9.7...v1.4.9.8