diff --git a/README.md b/README.md
index 8fe70d9..f132b67 100644
--- a/README.md
+++ b/README.md
@@ -26,6 +26,15 @@ Renders any arrangement that carries notation data in the `.sloppak` chart forma
 - **Note explorer** — alt-click (desktop) / double-tap (touch) a notehead for a pitch tooltip, without triggering seek.
 - **OGG loop** — click-drag (or touch-drag) across the score sets a loop region via the platform's native `setLoop()` API, with a green overlay that mirrors loops set through the platform's own controls.
 
+## Plugin dependencies
+
+Staffview reaches into two other plugins' globals directly (no manifest-level enforcement exists for this — see [feedback-plugin-splitscreen#47](https://github.com/get-flashbacks/feedback-plugin-splitscreen/issues/47) for the rationale behind this approach). Both are feature-detected and degrade gracefully when absent or on an older version:
+
+- **`feedback-plugin-notedetect`** (`window.createNoteDetector`) — verified present as of notedetect **v1.32.0**. Used to suppress the generic `note_detect` plugin's default singleton while staffview's own MIDI note-on/off judgment reports through the note-detection domain.
+- **`feedback-plugin-splitscreen`** (`window.feedBackSplitscreen` / `window.slopsmithSplitscreen`) — verified present as of splitscreen **v1.14.5**. Used to detect per-panel focus so MIDI/scoring routes to the active panel in a splitscreen layout.
+
+Neither is a hard requirement — staffview works standalone (main player, single-instance) without either installed.
+
 ## Install
 
 Copy or symlink this directory into your FeedBack `plugins/` folder: