- Implemented utility functions for extracting, validating, and normalizing Aktenzeichen in 'aktenzeichen_utils.py'.
- Created LangChainXAIService for integrating LangChain ChatXAI with file search capabilities in 'langchain_xai_service.py'.
- Developed VMH xAI Chat Completions API to handle OpenAI-compatible requests with support for Aktenzeichen detection and file search in 'xai_chat_completion_api_step.py'.