# OpenRouter API Key (get from https://openrouter.ai/keys) OPENROUTER_API_KEY=your_openrouter_api_key_here # Model Configuration LLM_MODEL=openai/gpt-4o-mini EMBEDDING_MODEL=openai/text-embedding-3-small # Chunking Configuration CHUNK_SIZE=1000 CHUNK_OVERLAP=200 # Retrieval Configuration TOP_K=5 # Paths CHROMA_PERSIST_DIR=./chroma_db LOG_DIR=./logs CORPUS_DIR=./data/corpus