# OpenAI (required from notebook 01)
OPENAI_API_KEY=sk-your-key-here
OPENAI_MODEL=gpt-4o-mini

# Tavily web search (free tier — required from notebook 04)
# Sign up: https://tavily.com → 1000 searches/month free
TAVILY_API_KEY=tvly-your-key-here

# Optional: pin where notes/briefs/cache get written
DEEPBRIEF_DATA_DIR=./data

# Optional: cache server URL (notebook 05+)
CACHE_SERVER_URL=http://localhost:8765/mcp