.env.example

# Mini RAG — environment variables
# Copy to .env and fill in. Never commit .env.

# --- Runtime ---
NODE_ENV=development
LOG_LEVEL=debug

# --- API ---
API_HOST=0.0.0.0
API_PORT=8000
API_CORS_ORIGINS=http://localhost:3000

# --- Storage ---
SQLITE_PATH=./data/mini_rag.sqlite
FAISS_INDEX_DIR=./data/faiss
HF_HOME=./.hf_cache

# --- Embeddings ---
EMBEDDING_MODEL=BAAI/bge-small-en-v1.5
EMBEDDING_DEVICE=cpu

# --- Chunking ---
CHUNK_SIZE=500
CHUNK_OVERLAP=80

# --- LLM (answer synthesis) ---
# Provider selection: "anthropic" or "openrouter".
# If the chosen provider has no API key, the API tries the other; if neither
# is configured, the lab falls back to returning the top retrieved chunk.
ANSWER_PROVIDER=anthropic
ANSWER_MAX_TOKENS=512
ANSWER_TIMEOUT_SEC=30

# Anthropic
ANTHROPIC_API_KEY=
ANSWER_MODEL=claude-haiku-4-5-20251001

# OpenRouter (OpenAI-compatible)
OPENROUTER_API_KEY=
OPENROUTER_MODEL=anthropic/claude-haiku-4.5
OPENROUTER_BASE_URL=https://openrouter.ai/api/v1
OPENROUTER_REFERER=https://github.com/
OPENROUTER_APP_TITLE=Mini RAG

# --- Rate limiting (per-IP token bucket on /v1/query) ---
RATE_LIMIT_CAPACITY=30
RATE_LIMIT_REFILL_PER_SEC=1.0

# --- Request limits ---
MAX_UPLOAD_BYTES=5242880

# --- Frontend ---
NEXT_PUBLIC_API_URL=http://localhost:8000