Proof & Demo (solo: Dinesh Kumar Saravanan)
Built at Meta Global AI Developer Hackathon · Oct 26, 2026 · Remote

Proof & Demo is a demo companion for solo builders. At my last hackathon, making the demo video was the hardest part, so I built a tool that makes it with me. It drafts a demo storyline from the idea and the judging criteria, turns it into a checklist of what each step must show, and checks screen recordings against that checklist with Muse Spark. It keeps only stretches that pass and gives a proof frame for each. Before any frame leaves the laptop, it boxes personal details with local OCR. Muse Spark writes narration from the frames. You edit every line in the app, Voice Transcribe checks each spoken clip against its line, and the tool cuts a narrated video. Every speed-up, trim and stitch is labelled, and the video ends on a proof card that lists every edit and what each Meta model did. This submission video was cut by Proof & Demo, from my recording of using it.