- Blog - Coverage-Driven Sustained Testing (CDST): A Graph-Oriented Model for Open-Ended Agentic Workflows Coverage-Driven Sustained Testing (CDST): A Graph-Oriented Model for Open-Ended Agentic Workflows Table of contents 1.1 Introduction Ralph is a solid tool that makes agents do…more. It's defined as: an autonomous AI agent loop that runs repeatedly until all PRD items are complete. The purpose...