# Brendan Cody-Kenny: The great software rewrite has begun

Technical Due Diligence for Software M&A https://sub.xiliary.com/p/brendancodykenny

### 2026-05-18 update #ai #due-diligence #m-and-a #rewrite
The great software rewrite has begun
- Feed the old system to AI as a behavioural spec, let it rebuild, and run both until they match. Weeks where it used to be years.
- If a rewrite costs a fraction of last year, the acquired asset is the spec, the tests and the people who know the failure modes.
- For M&A the question becomes who on this team could regenerate it if they had to.

https://sub.xiliary.com/p/brendancodykenny/posts/5/the-great-software-rewrite-has-begun