Good news for rapid prototypers. App.build, an open source AI agent for building and deploying full-stack applications, has taken a big leap out of the command line with its very own web interface. App.build App.build, for the uninitiated, is an AI coding agent built atop Neon’s serverless Postgres and Neon Auth, giving every generated app instant persistent storage, authentication, and a live `*.myneon.app` deployment, all from a single prompt. Neon’s serverless Postgres and Neon Auth At first glance, this might seem better suited to fly-by-night vibe coders building quick demos in weekend hacks. However, app.build does in fact output a complete, editable codebase in the user’s chosen stack, ready to pull from GitHub and modify at will. This can expedite boilerplate setup, accelerate proof-of-concept builds, or even fast-track production features that would otherwise be bogged down in environment configuration and deployment scripts. Since its launch back in June, app.build has been accessible via the command-line interface (CLI) only. The new UI removes that barrier, allowing users to spin up React, Laravel, or FastAPI apps directly from their browser, with no installs, no local config, and no waiting. Just type a prompt, hit “let’s start,” and get a live deployed app. launch back in June In the future, Neon says that app.build will also sport a live preview feature, so users can see their app as it’s being generated or modified. App.build puts reference architecture into action App.build puts reference architecture into action App.build is an important platform for Neon, serving as its reference architecture for agentic code generation: it’s both a working product, and a model example of how to build an AI-powered coding tool using Neon’s backend. One online commenter praised the “clean and intuitive” UI, noting that broad tech stack support spanning React, FastAPI, and Laravel strengthens its value as a reference architecture. online commenter praised Indeed, this sentiment reflects the dual appeal: a practical showcase for experienced developers, and an approachable on-ramp for newcomers. At launch, app.build was more about proving its technical chops in the terminal. The web UI is all about securing reach, making AI-driven app generation accessible to anyone with a browser and a prompt. Notably, Neon said that it is actually deprecating the CLI, explaining that supporting two separate interfaces in parallel isn’t sustainable, and that Web UIs “are much more generally useful” to most people. “We simply cannot maintain both the UI and the CLI working at the same time, even though they use the same backend API,” the company wrote in a blog post. “Very soon, the CLI will not be functional anymore.” in a blog post As a broader signal, Databricks’ recent move to acquire Neon underscores its push beyond abstract AI infrastructure into practical, developer-facing tools. With app.build, it’s not just showcasing what serverless Postgres can do, it’s providing a working blueprint for rapid, full-stack prototyping. A hands-on example of how Databricks’ expanding ecosystem can shorten the distance between idea and application. Databricks’ recent move to acquire Neon

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