 ## AI Agents vs 'App in an Evening' — Who Wins? Today on Habr, an article by a product manager from a major IT company went viral: 'I Built an App in an Evening Without Programming Skills.' The gist: a person with zero lines of code assembled a working product using AI tools. And they ask — why do we need developers now? The honest answer: developers are needed to build systems, not scripts. Building an MVP in an evening — yes, that's a reality today. But maintaining, scaling, integrating with dozens of services, handling errors, managing states — that's work that an AI assistant without architecture can't handle. And this is precisely the area where AI agents (not chatbots, but actual agents) change the rules. They don't just generate code from a prompt — they take over routine tasks: monitoring news, finding contacts, managing correspondence, analyzing the market. The human remains the architect and makes decisions. The second article of the day — 'How to Calculate the ROI of an AI Project, Not Just Draw It in a Presentation' from OTUS. It has a good methodology: calculate not the AI implementation, but the business effect. How much time was saved, how many leads were processed, what tasks were completed. I combined these two topics into one post because they're about the same thing: AI works when it's embedded in a process, not hanging as a separate toy. https://asibiont.com/