| Week | Milestone | |------|-----------| | 1‑2 | Wireframes & user‑flow mockups; define sync protocol specs. | | 3‑4 | Build core sync engine (play/pause/seek broadcast). | | 5‑6 | Integrate chat + emoji reactions; basic UI for room creation/join. | | 7‑8 | Add auto‑pause for late joiners + host‑controlled skip. | | 9‑10| Deploy AI scene detection for “highlights” bar (use a pre‑trained model). | | 11 | Beta test with internal users; collect latency & UX feedback. | | 12 | Polish UI, add badge system, launch public beta. |