GoKawiilNew open format StemJSON lets AI models generate native mobile app UI and logic
A developer has released StemJSON, a JSON-based declarative language designed specifically for AI systems to generate native mobile app interfaces and logic. It can be used to build entirely new apps or to extend existing ones, and is intended to plug into AI tools, prototyping environments, or IDE extensions. The format is open, meaning it can be freely adopted alongside hand-written code in development workflows.
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As AI coding assistants become common in app development, a structured intermediate format tailored for machine generation could reduce the gap between what an AI produces and what actually compiles into a working native app. If adopted, this could speed up prototyping and lower the barrier for non-experts to build mobile software using AI tools.
- StemJSON is a declarative, JSON-based language for AI-generated native app UI and logic
- It supports both building new apps and extending existing native codebases
- The format is open, allowing integration with various AI tools and IDEs
Source: stemjson.com, 2026-09-14
Published there as: “Show HN: StemJSON – a language for LLMs to extend native mobile apps on the fly”
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