Matthew Foster and John Mikel Amiel Regida finish their account of how they incrementally modernized a mobile application by looking at the results of their work. They achieved a significant shortening of time to new value, and found that changes in the new application could be prepared in about half the time ...

Matthew Foster and John Mikel Amiel Regida dive into the details of incrementally modernizing a legacy mobile application. They look at how to implant the strangler fig into the existing app, setting up bi-directional communication between the new app and the legacy, and ensuring effective regression testing on the...

My colleagues are often involved in modernizing legacy systems, and our approach is to do this in an incremental fashion. Doing this with a mobile application raises some specific challenges. Matthew Foster and John Mikel Amiel Regida share their experiences of a recent engagement to do this, shifting from a monolithic...

I was interviewed on the Book Overflow podcast about the Refactoring book. We talked about the origins of the book, the relationship between refactoring, testing, and extreme programming, how refactoring is used in the wild, and the role of books and long-form prose today. more…

Alessio Ferri, Tom Coggrave, and Shodhan Sheth complete their article on what they have learned from using GenAI with legacy systems. They describe how GenAI's ability to process unstructured information makes it much easier to build a capability map of a legacy system, tying the capabilities of a system to...

Alessio Ferri, Tom Coggrave, and Shodhan Sheth use their combination of an AST-fueled knowledge graph and LLMs to gain understanding of legacy systems. They have found it aids them both in extracting the low-level details of the code and can provide high-level explanations to support human-centered approaches...