Google lets you build your own app within Google Search with agentic coding
The landscape of online search is undergoing its most radical transformation since the invention of the search engine itself. For decades, searching the web meant typing a query, hitting enter, and browsing through a list of blue links to find the answer. Even with the recent integration of generative AI summaries, search engines have primarily functioned as content aggregators and information synthesizers. That is all about to change. Google has announced a groundbreaking paradigm shift: the ability for users to build their own custom applications directly inside Google Search using agentic coding. Rather than simply retrieving existing web pages, Google Search can now write code, design user interfaces, and build fully functioning, interactive mini-applications on the fly, tailored precisely to a user’s unique requirements. Announced by Liz Reid, the head of Google Search, at the Google I/O conference, this update leverages advanced artificial intelligence to turn Google Search from an information retrieval tool into an active software generation engine. According to Reid, “Search can build the ideal response, in the right format for your question – completely on the fly. So you can get custom generative UI, including visual tools and simulations, tailored precisely to your needs.” What is Agentic Coding in Google Search? To understand the magnitude of this announcement, it is essential to define what “agentic coding” actually means. Traditional generative AI can write code snippets when prompted. If you ask a standard AI chatbot to write a basic HTML calculator, it will generate the raw code for you to copy, paste, and run in your own development environment. Agentic coding in Google Search goes several steps further. It refers to an autonomous AI system (an “agent”) that does not just write the code but executes, tests, renders, and embeds the application directly into your search results page in real-time. The AI determines what kind of application, layout, data integration, and interactive components are needed to solve your query. It then writes the software under the hood, instantly rendering a custom Generative User Interface (UI) that you can interact with immediately. This means searchers no longer have to navigate away from the search engine to use specialized tools, calculators, spreadsheets, or simulators. Google Search becomes the software development platform, generating tailored mini-apps on demand. Three Revolutionary Use Cases for Custom Mini-Apps in Search During the announcement at Google I/O, Google showcased several real-world scenarios where agentic coding completely redefines how users interact with information. These examples demonstrate the range of the technology, from deep educational modeling to multi-step planning and real-time data integration. 1. Real-Time Educational Simulations and Generative UI Understanding highly complex, abstract scientific or mechanical concepts has always been a challenge when relying solely on static text and basic diagrams. With generative UI driven by agentic coding, Google Search can design bespoke, interactive visual simulations on the fly. For example, if you want to understand the intricate physics of astrophysics or visualize exactly how a mechanical watch movement operates, Search does not just serve up articles or instructional videos. Instead, it builds custom layouts in real-time. It assembles interactive dynamic 3D elements, tables, graphs, and live physics simulations. You can slide controls to change variables, watch the visual models adapt in real-time, and explore the concept through a hands-on, custom-built application made specifically for your query. 2. Ongoing Task Widgets and Stateful Trackers Most search queries are transactional or informational, completed in a single session. However, complex life events—such as planning a wedding or coordinating a major home relocation—require weeks or months of continuous tracking, modification, and organization. To solve this, Google Search can now build custom dashboards and trackers. These function as stateful mini-apps that you can return to repeatedly. If you tell Google you are planning a wedding with a specific budget, guest count, and location preference, the search engine will code a custom dashboard complete with budget trackers, checklist widgets, and vendor comparison tables. As you make progress, you can return to Google Search, pull up your custom widget, update your data, and continue managing your project directly from the search engine interface. 3. Custom Fitness Trackers with Live API Integrations Another powerful application of agentic coding in Search is the creation of hyper-personalized tools that pull from real-time external data sources. Google demonstrated this by showing how a searcher can ask for a highly customized fitness tracker. When you ask Google Search to build a fitness plan and tracker tailored to your lifestyle, the AI goes to work coding a custom app. It does not just provide a generic static table. It builds an interactive tracker that pulls in live, real-time data sources. This includes local weather forecasts to suggest optimal outdoor running times, live maps to plot routes, and local business reviews to recommend nearby gyms or healthy dining options. The result is a fully functional, dynamic fitness companion embedded directly within your search experience, helping you stay on track week after week. Under the Hood: How Google Generates Software on the Fly The technology behind this capability relies on a combination of massive language models, real-time code execution environments, and dynamic rendering frameworks. To learn more about the announcement and the underlying technology, you can explore the official Google I/O announcement blog post. Historically, search engines worked by indexing pre-existing documents. When a query was entered, the system matched the keywords to the indexed documents and ranked them. With the advent of Retrieval-Augmented Generation (RAG) and Large Language Models, search engines began generating textual summaries of those documents. Agentic coding represents the next tier of this evolution. When a user submits a query that requires more than a simple text answer, Google’s AI agents interpret the intent as a software requirement. The system then: Drafts the Application Architecture: The AI decides what components are needed (e.g., input fields, data visualization charts, interactive maps, or buttons). Writes and Compiles Code: The agent writes the necessary frontend and backend code to make the widget functional. Assembles Generative UI: The layout is