PartFidelity

Repair videos are hard to follow with your hands full. You pause, rewind and hunt for the same step again. Written guides exist for popular devices, but most real repairs only exist as someone's video. PartFidelity turns a phone video of a repair into a step-by-step guide you can read while you work. What you get: - Each step card shows an original frame from the video, with the part that step is about outlined. - A step with a battery or a glued screen folds the later steps away behind a warning until you acknowledge it. The warning text is fixed; the models only propose which steps need one. - If the video never shows a step (in the sample, disconnecting the battery), the guide marks it as a gap instead of inventing it. - Every model call leaves a receipt (model, time, cost) on a calls page, and spend is reserved before a call is sent. How it runs: everything lives on Modal. The site and the full video pipeline run in one Modal container (a Volume for job files, a Secret for keys), the test suite runs sharded on Modal before every merge, and the GPU renders for the visuals ran there too. Who it is for: anyone fixing their own device from a video, and repair shops. A shop can film its senior technician doing one repair and use the guide to train new staff. You can make your own guide from a clip of up to 5 minutes. The sample (a battery swap on a Lenovo laptop) is at https://was7mahmed--partfidelity-web.us-east.modal.run/guide/sample and "how it was built" is at https://was7mahmed--partfidelity-web.us-east.modal.run/built