diff --git a/docs/TODO.md b/docs/TODO.md
index 26447a4..6847559 100644
--- a/docs/TODO.md
+++ b/docs/TODO.md
@@ -11,6 +11,12 @@
 - Show active item highlight and hover states; keep drop-to-playlist behavior for files/folders.
 - Verify drop handling on all platforms (Wayland/X11/Windows).
 
+## Compare Mode (VT/VideoTools parity)
+- Add synchronized play/pause/seek for dual players.
+- Add frame-by-frame synced navigation and linked volume/speed controls.
+- Provide a sync toggle and drift indicator; allow offset nudge for out-of-sync sources.
+- Ensure artifact inspection at identical frames (exact seek/step alignment).
+
 ## Keyframing (next milestone)
 - Define keyframe data model and storage (per file).
 - Render markers/ticks on the seek bar; jump/add/delete keyframes with shortcuts.