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| # Copy to back_end/.env (or .env) for local development. Never commit the real file. | |
| # On Hugging Face, set these under Space → Settings → Variables and secrets. | |
| # Only used if ALLOW_SERVER_KEY_FALLBACK=true (users who don't paste a key use yours). | |
| GOOGLE_API_KEY= | |
| ALLOW_SERVER_KEY_FALLBACK=false | |
| # Extra origins allowed to call the API (comma-separated). Empty = same-origin only. | |
| ALLOWED_ORIGINS= | |
| # Limits | |
| MAX_LOADED_REPOS=20 | |
| SESSION_IDLE_TTL_SECONDS=1800 | |
| RATE_LIMIT_INIT_PER_MIN=3 | |
| RATE_LIMIT_CHAT_PER_MIN=12 | |
| # 0 = auto-detect client IP behind the proxy; set to the exact proxy count if known | |
| TRUSTED_PROXY_HOPS=0 | |
| # Fall back to keyword search if embedding would take longer than this (seconds) | |
| EMBEDDING_TIME_BUDGET_SECONDS=600 | |
| MAX_CHUNKS_TO_EMBED=4000 | |
| # Embeddings: auto (CUDA if onnxruntime-gpu is installed) | cpu | |
| EMBEDDING_DEVICE=auto | |
| # Local development only | |
| ENABLE_API_DOCS=false | |