How AgenticOS Built Animated Desktop Pets Using Modular Sprite Logic

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Vstorm developer built five animated desktop pets for AgenticOS, an open-source Tauri-based AI agent platform, as a lightweight companion feature. Each pet — including a ghost, sprout, and the sombrero-wearing Amigo — shares a common animation system but has unique artwork and part coordinates defined in pet-sprites.js. Animations like blinking, waving, and walking are constructed by layering character parts rather than redrawing full frames, making it easy to add new pets. A separate engine file, pet-engine.js, governs pet behaviour — including idle standing, occasional walks, cursor-eye tracking, and a stroking detection mechanism based on directional cursor changes. The logic is kept stateless and testable, with explicit inputs so behaviours can be verified independently without requiring a live desktop window.

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