.env.example

# Database
CC2_DATABASE_URL=postgresql://coderag:your_password@localhost:54329/coderag
POSTGRES_PASSWORD=your_password

# Voyage AI (required - get your key at https://dash.voyageai.com/)
CC2_VOYAGE_API_KEY=pa-...

# Server Config
CC2_LOG_LEVEL=INFO

# Retrieval tuning (optional)
CC2_RERANK_TOP_K_OUTPUT=8
CC2_RERANK_RELATIVE_FACTOR=0.75
CC2_RERANK_SCORE_FLOOR=0.40
CC2_RESULT_MAX_TOKENS=8000

# Search quality logging (optional, JSONL)
# Example: /tmp/cc2-search.jsonl
CC2_SEARCH_LOG_PATH=

# Experimental hybrid retrieval (dense + lexical + exact symbol fusion)
CC2_HYBRID_SEARCH_ENABLED=false
CC2_HYBRID_LEXICAL_K=50
CC2_HYBRID_RRF_RANK_CONSTANT=60
CC2_HYBRID_DENSE_WEIGHT=1.0
CC2_HYBRID_LEXICAL_WEIGHT=0.8
CC2_HYBRID_EXACT_SYMBOL_WEIGHT=1.2
CC2_EXACT_SYMBOL_SEARCH_ENABLED=true
CC2_EXACT_SYMBOL_MIN_LENGTH=3

# Query Expansion via OpenAI (optional)
CC2_QUERY_EXPANSION_ENABLED=false
CC2_QUERY_EXPANSION_API_KEY=sk-...
CC2_QUERY_EXPANSION_MODEL=gpt-5.4-nano-2026-03-17
CC2_QUERY_EXPANSION_URL=https://api.openai.com
CC2_QUERY_EXPANSION_TIMEOUT_S=15.0