I'm a grower, not an Android dev — my background is Unity/XR. But I wanted a HUD for my microgreens, so I built SproutVision with an AI coding agent as my pair programmer: Kotlin + Meta Spatial SDK, Room database, Gemini for image analysis. Friday: app crashed on launch. Saturday: camera preview was pure black (turned out to be a wrong-camera issue — Meta's passthrough cameras need vendor-tag selection, undocumented-ish). Sunday: first real scan, and the AI correctly diagnosed my struggling basil. Total build time measured in days, not months. The agent wrote the code; I did the debugging, the headset testing, and the "wait, that's the wrong camera" realization. Demo: https://youtu.be/ely034D\_Jy8?is=PZspCrAOMVb3e7FE If you've been sitting on a hardware-adjacent side project because the stack scared you — this is your sign.   submitted by   /u/fandomgames [link]   [comments]