# Source Documentation

Use these links for framework-specific details.

## FastAPI

!!! info "FastAPI sources"
    - [Lifespan events](https://fastapi.tiangolo.com/advanced/events/)
    - [Settings and environment variables](https://fastapi.tiangolo.com/advanced/settings/)
    - [Dependencies with yield](https://fastapi.tiangolo.com/tutorial/dependencies/dependencies-with-yield/)
    - [SQL databases tutorial](https://fastapi.tiangolo.com/tutorial/sql-databases/)

## SQLAlchemy and Alembic

!!! info "Persistence sources"
    - [SQLAlchemy engine configuration and pooling](https://docs.sqlalchemy.org/en/20/core/engines.html)
    - [SQLAlchemy session lifecycle basics](https://docs.sqlalchemy.org/en/20/orm/session_basics.html)
    - [Alembic tutorial](https://alembic.sqlalchemy.org/en/latest/tutorial.html)

## Pydantic

!!! info "Pydantic source"
    - [Pydantic settings management](https://pydantic.dev/docs/validation/latest/concepts/pydantic_settings/)

## NiceGUI

!!! info "NiceGUI sources"
    - [Pages, routing, and FastAPI integration](https://www.nicegui.io/documentation/section_pages_routing)
    - [Security best practices](https://www.nicegui.io/documentation/section_security)

## LangGraph

!!! info "LangGraph sources"
    - [Overview](https://docs.langchain.com/oss/python/langgraph/overview)
    - [Quickstart](https://docs.langchain.com/oss/python/langgraph/quickstart)
    - [Workflows and agents](https://docs.langchain.com/oss/python/langgraph/workflows-agents)
    - [Persistence](https://docs.langchain.com/oss/python/langgraph/persistence)
    - [Memory concepts](https://docs.langchain.com/oss/python/concepts/memory)
    - [Streaming](https://docs.langchain.com/oss/python/langgraph/streaming)
    - [Interrupts and human-in-the-loop](https://docs.langchain.com/oss/python/langgraph/interrupts)