Why start a blog in 2026 anyway...

Here’s a simple test you can apply to any software system you work on: Imagine deleting the entire implementation. Not refactoring it. Not archiving it. Not putting it behind a feature flag. Deleting it. rm -rf src/ If that thought makes your stomach dro...

When code can be thrown away and recreated, the unit of change is no longer lines of code. It’s reasons. Version control has to follow. Regenerable systems quietly invalidate an assumption that has underpinned software engineering for decades: that the t...

Why Regeneration Does Not Mean Starting Over

As I mentioned in a previous post, at Wunderlist, we had a rule: any new service had to be "this big", a constraint I'd demonstrate by holding my fingers a few inches apart. The metric wasn't about lines of code. It was about replaceability. If a service w...

Why behavior outlives implementations