Version 4.3.0

Released: March 18, 2026

This release introduces three major features: a database handler for agent state bodies, migration of the configuration format from INI to YAML, and a website crawler utility with an accompanying example agent.

New Features

DB Handler

Agents can now interact with relational databases through the new DBHandler class. It provides structured, type-safe access to one or more SQL databases directly from within state body functions, with support for both raw SQL and natural language queries translated to SQL via an LLM.

Configuration Migration: INI → YAML

The agent configuration format has been fully migrated from .ini files to .yaml files.

This allows for a more hierarchical and expressive configuration structure, better support for complex data types, and improved readability. All existing configuration keys and values are preserved, but they are now organised in a nested YAML format instead of flat INI sections.

Website Crawler and Web Crawl Agent

A new utility function crawl_website performs a breadth-first crawl of a website and returns the text content of each visited page, either as raw HTML or converted Markdown. This is primarily intended for building lightweight knowledge bases to ground LLM responses (retrieval-augmented generation over website content).

An example agent web_crawl_agent demonstrates how to use this utility to fetch and process website content.

Breaking Changes

• config.ini files are no longer supported. All agent configurations must be migrated to config.yaml. See the migration guide above and the updated example configuration files in baf/test/examples/.