.env.example

ANTHROPIC_API_KEY=your_anthropic_api_key_here

# LangSmith tracing (optional)
LANGCHAIN_TRACING_V2=true
LANGCHAIN_API_KEY=your_langsmith_api_key_here
LANGCHAIN_PROJECT=multi-agent-codegen

# Model configuration
ORCHESTRATOR_MODEL=claude-opus-4-6
PLANNER_MODEL=claude-sonnet-4-6
CODER_MODEL=claude-sonnet-4-6
REVIEWER_MODEL=claude-sonnet-4-6
TESTER_MODEL=claude-sonnet-4-6

# LangGraph settings
LANGGRAPH_RECURSION_LIMIT=50

# App settings
LOG_LEVEL=INFO

# Experiment budget (USD). The BudgetCallbackHandler tallies token spend and
# raises BudgetExceeded once the limit is crossed. Eval runs respect this.
EXPERIMENT_BUDGET_USD=25

# Prompt caching (Anthropic ephemeral cache_control). Cuts input-token cost on
# cache hits within a revision loop. Set to "false" to disable for A/B tests.
ENABLE_PROMPT_CACHE=true