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Developer Builds Firebase AI Image Analyzer Using Antigravity CLI and Gemini Models

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A developer has built an image analysis demo application using Angular, Firebase Hybrid and On-device Inference Web SDK, and Google's Gemini AI models, supported by Google Cloud credits. The app allows users to upload images and receive AI-generated alternative texts, tags, recommendations, and CSS tips to improve image quality. When run on Chrome 148 or later, the app uses an on-device Gemini Nano model via the Prompt API, consuming zero tokens, while other browsers like Safari and Firefox fall back to the cloud-based Gemini 3.5 Flash model. The project was built using the Antigravity CLI with the Stitch MCP server, and incorporated three skills — grill-with-docs, Angular, and Firebase — to handle specification generation, modern Angular architecture, and Firebase AI Logic respectively.

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