.env.example

LLM_PROVIDER=openai

# Core API keys
OPENAI_API_KEY=sk-your-openai-key
TAVILY_API_KEY=tvly-your-tavily-key
LANGSMITH_API_KEY=
# LANGSMITH_TRACING=true
# LANGSMITH_PROJECT=LangGraph-Mastery-Playbook

# OpenAI configuration
# OPENAI_BASE_URL=https://api.openai.com/v1
# OPENAI_MODEL=gpt-5-nano
# OPENAI_TEMPERATURE=0.0

# OpenRouter configuration
OPENROUTER_API_KEY=sk-your-openrouter-key
# OPENROUTER_BASE_URL=https://openrouter.ai/api/v1
# OPENROUTER_MODEL=anthropic/claude-haiku-4.5
# OPENROUTER_TEMPERATURE=0.0

# DeepSeek configuration
DEEPSEEK_API_KEY=sk-your-deepseek-key
# DEEPSEEK_BASE_URL=https://api.deepseek.com/v1
# DEEPSEEK_MODEL=deepseek-chat
# DEEPSEEK_TEMPERATURE=0.0

# Stage 06 production memory backends
# BACKEND_KIND=postgres        # postgres | mongodb | redis
# BACKEND_URI=postgresql://user:pass@localhost:5432/langgraph
# BACKEND_INITIALIZE=true      # set true to create tables on first run