| def predict_retention(words): | |
| if not words: | |
| return 0 | |
| duration = words[-1]["end"] - words[0]["start"] | |
| score = 100 | |
| # too long → drop-off risk | |
| if duration > 30: | |
| score -= 30 | |
| # too short → no engagement | |
| if duration < 6: | |
| score -= 20 | |
| # weak opening signal | |
| if "..." in words[0]["text"]: | |
| score -= 10 | |
| return max(0, score) |