This event is a practical technical talk and live demo for developers, founders, and AI builders interested in how agent workflows can be used on ambitious product work without creating unreliable output. Using CS Brasil, a browser FPS played by people across 27 countries, I will walk through the engineering loop behind the project: how tasks are scoped for agents, how browser-based verification and screenshot checks are used, how regressions are hunted, and how creative software can still be kept shippable under AI-heavy workflows. The objective is to move the conversation away from vague “AI wrote this” stories and toward concrete operational patterns that teams can copy tomorrow. Expected impact: strong interest from Lisbon’s local AI and developer community, a high-signal case study for Lisbon AI Week, and a locally rooted event that connects AI, product engineering, and interactive web experiences.