
Simon Brown
33.9K posts

Simon Brown
@simonbrown
Creator of the C4 model for visualising software architecture and Structurizr | Author of “The C4 Model” (O’Reilly, released summer 2026)










the future of software engineering seems uncontroversially prompting + code review. startups will skip the code review because they’re racing against time. larger/serious orgs will take code review very seriously. llms can do code review, but my guess is that because they have to search through large space, it will be as expensive to have say mythos review your code as it would be to have a senior dev. based on budget: $: prompting only $$: low grade llm review $$$: mid grade llm + dev review $$$$: high grade llm + sr dev review btw, software (past the bootstrapping phase) will get more expensive to make and take more time. quality will remain exactly the same as when humans were doing it: shit.






I just talked to a vibecoder on Reddit He was actually a software developer himself, so working with AI is much easier and much better for him than a non-developer but still... he had issues as the codebase grew starting from scratch works amazingly well for the first stages of the project as things get more complicated, the prompts must be more specialised, and you have to do smaller things in smaller steps so the gain in time you can get shrinks by a lot I am ready to bet that the next few years will still be like the wild west, where devs use AI as companies experiment with all sorts of setups for this we are far away from drawing conclusions but this thing will be here to stay, and we wont figure things out at least by 2030

Half the industry is at level 1 of architecture diagram maturity. That means: nothing. Just vibes & boxes. @simonbrown, creator of the #C4Model, explains what lvls 2 – 5 look like & how to get there. Spoiler: you need to stop diagramming & start modeling youtu.be/FqTL-_tLf6I?li…








