agent_delta/docs/configuration.md

Configuration Reference

All configuration is managed via environment variables, loaded from backend/.env using pydantic-settings.

Settings are defined in app/core/config.py and accessed via the global settings object:

from app.core.config import settings

print(settings.AI_MODEL)
print(settings.DEBUG)

Getting Started

cd backend

# Copy the example file (may already exist if generated with --generate-env)
cp .env.example .env

# Generate a secure secret key
openssl rand -hex 32
# Paste the output as SECRET_KEY in .env

Project Settings

Variable	Default	Description
PROJECT_NAME	agent_delta	Display name for the project
API_V1_STR	/api/v1	API version prefix
DEBUG	false	Enable debug mode (verbose errors, auto-reload)
ENVIRONMENT	local	One of: development, local, staging, production
TIMEZONE	UTC	IANA timezone (e.g. UTC, Europe/Warsaw, America/New_York)
MODELS_CACHE_DIR	./models_cache	Directory for cached ML models
MEDIA_DIR	./media	Directory for uploaded files
MAX_UPLOAD_SIZE_MB	50	Maximum file upload size in megabytes

Authentication

JWT

Variable	Default	Description
SECRET_KEY	(insecure default)	JWT signing key. Must be changed in production. Generate with: openssl rand -hex 32
ACCESS_TOKEN_EXPIRE_MINUTES	30	Access token lifetime
REFRESH_TOKEN_EXPIRE_MINUTES	10080	Refresh token lifetime (7 days)
ALGORITHM	HS256	JWT signing algorithm

Production validation: SECRET_KEY must be at least 32 characters and cannot use the default value in ENVIRONMENT=production.

API Key

Variable	Default	Description
API_KEY	change-me-in-production	Shared API key for programmatic access
API_KEY_HEADER	X-API-Key	HTTP header name for API key

Production validation: API_KEY cannot use the default value in ENVIRONMENT=production.

Database (PostgreSQL)

Variable	Default	Description
POSTGRES_HOST	localhost	PostgreSQL host
POSTGRES_PORT	5432	PostgreSQL port
POSTGRES_USER	postgres	PostgreSQL user
POSTGRES_PASSWORD	(empty)	PostgreSQL password
POSTGRES_DB	agent_delta	Database name
DB_POOL_SIZE	5	Connection pool size
DB_MAX_OVERFLOW	10	Max overflow connections
DB_POOL_TIMEOUT	30	Pool timeout in seconds

Computed properties:

• DATABASE_URL -- async connection string (postgresql+asyncpg://...)
• DATABASE_URL_SYNC -- sync connection string for Alembic

Redis

Variable	Default	Description
REDIS_HOST	localhost	Redis host
REDIS_PORT	6379	Redis port
REDIS_PASSWORD	(none)	Redis password (optional)
REDIS_DB	0	Redis database number

AI Agent

Variable	Default	Description
OPENAI_API_KEY	(empty)	OpenAI API key
AI_MODEL	gpt-5.5	Default LLM model for chat
AI_TEMPERATURE	0.7	LLM temperature (0.0 = deterministic, 1.0 = creative)
AI_AVAILABLE_MODELS	(auto-configured)	JSON list of models shown in the UI model selector
AI_FRAMEWORK	pydantic_deep	AI framework (informational)
LLM_PROVIDER	openai	LLM provider (informational)

Customizing Available Models

Override AI_AVAILABLE_MODELS in .env to customize the model selector:

AI_AVAILABLE_MODELS=["gpt-5.5","gpt-5.4","claude-opus-4-7"]

Observability (Logfire)

Variable	Default	Description
LOGFIRE_TOKEN	(none)	Pydantic Logfire token. Get one at https://logfire.pydantic.dev
LOGFIRE_SERVICE_NAME	agent_delta	Service name in Logfire dashboard
LOGFIRE_ENVIRONMENT	development	Environment tag

Web Search

Variable	Default	Description
TAVILY_API_KEY	(empty)	Tavily API key for web search tool. Get one at https://tavily.com

RAG (Retrieval Augmented Generation)

Vector Database

Variable	Default	Description
QDRANT_HOST	localhost	Qdrant host
QDRANT_PORT	6333	Qdrant port
QDRANT_API_KEY	(empty)	Qdrant API key (optional)

Embeddings

Variable	Default	Description
EMBEDDING_MODEL	text-embedding-3-small	OpenAI embedding model

Chunking & Retrieval

Variable	Default	Description
RAG_CHUNK_SIZE	512	Maximum characters per chunk
RAG_CHUNK_OVERLAP	50	Characters of overlap between chunks
RAG_CHUNKING_STRATEGY	recursive	Chunking strategy: recursive, markdown, fixed
RAG_DEFAULT_COLLECTION	documents	Default collection for search (used by agent tool)
RAG_TOP_K	10	Default number of results to return
RAG_HYBRID_SEARCH	false	Enable BM25 + vector hybrid search
RAG_ENABLE_OCR	false	OCR fallback for scanned PDFs (requires tesseract-ocr)

Document Parsing

Reranking

Variable	Default	Description
HF_TOKEN	(empty)	HuggingFace token (for gated models)
CROSS_ENCODER_MODEL	cross-encoder/ms-marco-MiniLM-L6-v2	Cross-encoder model for reranking

Taskiq

Variable	Default	Description
TASKIQ_BROKER_URL	redis://localhost:6379/1	Taskiq broker URL
TASKIQ_RESULT_BACKEND	redis://localhost:6379/1	Taskiq result backend URL

CORS

Variable	Default	Description
CORS_ORIGINS	["http://localhost:3000","http://localhost:8080"]	Allowed origins (JSON array)
CORS_ALLOW_CREDENTIALS	true	Allow credentials (cookies)
CORS_ALLOW_METHODS	["*"]	Allowed HTTP methods
CORS_ALLOW_HEADERS	["*"]	Allowed HTTP headers

Production validation: CORS_ORIGINS cannot contain "*" in ENVIRONMENT=production.

Rate Limiting

Variable	Default	Description
RATE_LIMIT_REQUESTS	100	Maximum requests per period
RATE_LIMIT_PERIOD	60	Period in seconds

Docker / Production

Variable	Default	Description
DOMAIN	example.com	Production domain (for Traefik)
ACME_EMAIL	admin@example.com	Let's Encrypt email for SSL certs
REDIS_PASSWORD	change-me-in-production	Redis password for production

Production Checklist

Before deploying to production, ensure these variables are properly set:

1. SECRET_KEY -- Generate a unique 64-character hex key: openssl rand -hex 32
2. API_KEY -- Generate a unique key: openssl rand -hex 32
3. ENVIRONMENT -- Set to production
4. DEBUG -- Set to false
5. POSTGRES_PASSWORD -- Use a strong, unique password
6. CORS_ORIGINS -- List only your actual frontend domain(s)
7. REDIS_PASSWORD -- Set a strong password
8. OPENAI_API_KEY -- Your production API key