jack/PPT @ b273bded7137e2c6eab8d9b11c3fa02f342a801c

jimmylee 5ed9f08e78 docs(speaking): implementation plan for custom prompt + greeting		5 mesiacov pred
..
2026-05-15-video-scene-and-word-pronunciation.md	291aa2b957 docs(speaking): add implementation plan for video scene + word-level pronunciation	5 mesiacov pred
2026-05-16-custom-prompt-and-greeting.md	5ed9f08e78 docs(speaking): implementation plan for custom prompt + greeting	5 mesiacov pred