Taming the Legacy Beast with AI — with Dave Rooney

Why we picked it

# 📣 Agile Ottawa Meetup – May 14th 🗓️ **Date:** Thursday, May 14 🕕 **Time:** 18:00 – 20:00 📍 **Location:** CGI Offices – 55 Metcalfe Street, Suite 250, Ottawa 🪪 **Important:** Government-issued photo ID is required to enter the building. 🍕 **Yes, there’s pizza.** Yes, you should RSVP. *** ### **About the Session presented by Dave Rooney** Most of the hype we hear about AI and LLMs for developing software is for building new systems using vibe coding or the more recent Specification-Driven Development. That's great, but what about the vast majority of software that already exists? What about all of the legacy code that has become encrusted with barnacles and seaweed over its lifetime? How can we apply AI there? This session is about my journey from using LLMs to first understand legacy code, then add tests where there were none before and then into actively developing using a test-driven approach. I'll provide case studies about the work I've been doing and how it has evolved