Report the instrument's automatable parameters to the host under a frozen id table, in signal-flow order, with real units

42 of 44 ids issued: pitch key-track and Trigger length stay reserved
pending a live path. Master gain reclassified Live — it never reloaded.

src/shell/instrument/editor_input_deck.cpp

@@ -125,6 +125,12 @@ bool ReaSamplerEditor::mouseDownDeck(const FaceLayout& fl, int x, int y) {
         dragStartParams_ = params_;
         dragStartX_ = x;
         dragStartY_ = y;
+        // Opens the host's edit bracket for the whole gesture, so a host in touch or latch mode
+        // records one continuous edit rather than a burst of one-point ones. Closed on release
+        // and on capture-lost; a control with no parameter row is a no-op inside the processor.
+        if (processor_) {
+            processor_->beginParamGesture(static_cast<instrument::ui::DeckParam>(dragParamId_));
+        }
         invalidate();
     }
     // The deck band swallows its own clicks either way — no fall-through to the waveform.
@@ -188,8 +194,14 @@ void ReaSamplerEditor::dragDeck(int x, int y) {
     }
     applyDeckKnob(dragParamId_, norm);
     // A live control is delivered on every move, not only on release — that is the whole
-    // point: the note already sounding tracks the hand on the knob.
-    if (dragCommitsLive(DragKind::kDeckKnob, dragParamId_)) commitLive();
+    // point: the note already sounding tracks the hand on the knob. The processor-side knobs
+    // are skipped because applyDeckKnob already wrote them straight through; commitLive would
+    // only re-push an unchanged parameter set. The release and capture-lost paths ask this same
+    // question; the reset path never reaches the commit for them at all.
+    if (!deckKnobIsProcessorSide(dragParamId_) &&
+        dragCommitsLive(DragKind::kDeckKnob, dragParamId_)) {
+        commitLive();
+    }
     invalidate();
 }