diff --git a/ui/analyse/src/ctrl.ts b/ui/analyse/src/ctrl.ts
index 13d6bbbf663e2..74f440392bd1a 100644
--- a/ui/analyse/src/ctrl.ts
+++ b/ui/analyse/src/ctrl.ts
@@ -419,7 +419,7 @@ export default class AnalyseCtrl {
     }
     site.pubsub.emit('ply', this.node.ply, this.tree.lastMainlineNode(this.path).ply === this.node.ply);
     this.showGround();
-    this.auxUpdate(this.node.fen);
+    this.pluginUpdate(this.node.fen);
   }
 
   userJump = (path: Tree.Path): void => {
@@ -592,7 +592,7 @@ export default class AnalyseCtrl {
     this.tree.addDests(dests, path);
     if (path === this.path) {
       this.showGround();
-      this.auxUpdate(this.node.fen);
+      this.pluginUpdate(this.node.fen);
       if (this.outcome()) this.ceval.stop();
     }
     this.withCg(cg => cg.playPremove());
@@ -993,14 +993,14 @@ export default class AnalyseCtrl {
     else if (plyDelta < -1) control.first(this);
   };
 
-  auxMove = (orig: cg.Key, dest: cg.Key, prom: cg.Role | undefined) => {
+  pluginMove = (orig: cg.Key, dest: cg.Key, prom: cg.Role | undefined) => {
     const capture = this.chessground.state.pieces.get(dest);
     this.sendMove(orig, dest, capture, prom);
   };
 
-  auxUpdate = (fen: string) => {
+  pluginUpdate = (fen: string) => {
     // if controller and chessground board state differ, ignore this update. once the chessground
-    // state is updated to match, auxUpdate will be called again.
+    // state is updated to match, pluginUpdate will be called again.
     if (!fen.startsWith(this.chessground?.getFen())) return;
 
     this.keyboardMove?.update({ fen, canMove: true });
diff --git a/ui/chess/src/moveRootCtrl.ts b/ui/chess/src/moveRootCtrl.ts
index 0e346801d280e..d01ef94d3084a 100644
--- a/ui/chess/src/moveRootCtrl.ts
+++ b/ui/chess/src/moveRootCtrl.ts
@@ -1,7 +1,7 @@
 import * as cg from 'chessground/types';
 
 export interface MoveRootCtrl {
-  auxMove: (orig: cg.Key, dest: cg.Key, prom: cg.Role | undefined) => void;
+  pluginMove: (orig: cg.Key, dest: cg.Key, prom: cg.Role | undefined) => void;
   redraw: () => void;
   flipNow: () => void;
   offerDraw?: (v: boolean, immediately?: boolean) => void;
diff --git a/ui/keyboardMove/src/main.ts b/ui/keyboardMove/src/main.ts
index dc731e412f3f6..b2f4442ee735c 100644
--- a/ui/keyboardMove/src/main.ts
+++ b/ui/keyboardMove/src/main.ts
@@ -100,7 +100,7 @@ export function ctrl(root: KeyboardMoveRootCtrl): KeyboardMove {
       if (!role || role == 'pawn' || (role == 'king' && variant !== 'antichess')) return;
       cg.cancelMove();
       promote(cg, dest, role);
-      root.auxMove(orig, dest, role);
+      root.pluginMove(orig, dest, role);
     },
     update(up: MoveUpdate) {
       if (up.cg) cg = up.cg;
diff --git a/ui/puzzle/src/ctrl.ts b/ui/puzzle/src/ctrl.ts
index 257df6df68a1c..5426b15f2ecfd 100644
--- a/ui/puzzle/src/ctrl.ts
+++ b/ui/puzzle/src/ctrl.ts
@@ -137,7 +137,7 @@ export default class PuzzleCtrl implements ParentCtrl {
         game: { variant: { key: 'standard' } },
         player: { color: this.pov },
       },
-      auxMove: this.auxMove,
+      pluginMove: this.pluginMove,
       redraw: this.redraw,
       flipNow: this.flip,
       userJumpPlyDelta: this.userJumpPlyDelta,
@@ -251,7 +251,7 @@ export default class PuzzleCtrl implements ParentCtrl {
 
   showGround = (g: CgApi): void => g.set(this.makeCgOpts());
 
-  auxMove = (orig: Key, dest: Key, role?: Role) => {
+  pluginMove = (orig: Key, dest: Key, role?: Role) => {
     if (role) this.playUserMove(orig, dest, role);
     else
       this.withGround(g => {
@@ -261,7 +261,7 @@ export default class PuzzleCtrl implements ParentCtrl {
       });
   };
 
-  auxUpdate = (fen: string): void => {
+  pluginUpdate = (fen: string): void => {
     this.voiceMove?.update({ fen, canMove: true });
     this.keyboardMove?.update({ fen, canMove: true });
   };
@@ -272,7 +272,7 @@ export default class PuzzleCtrl implements ParentCtrl {
       !this.promotion.start(orig, dest, { submit: this.playUserMove, show: this.voiceMove?.promotionHook() })
     )
       this.playUserMove(orig, dest);
-    this.auxUpdate(this.node.fen);
+    this.pluginUpdate(this.node.fen);
   };
 
   playUci = (uci: Uci): void => this.sendMove(parseUci(uci)!);
@@ -539,7 +539,7 @@ export default class PuzzleCtrl implements ParentCtrl {
     this.promotion.cancel();
     this.justPlayed = undefined;
     this.autoScrollRequested = true;
-    this.auxUpdate(this.node.fen);
+    this.pluginUpdate(this.node.fen);
     site.pubsub.emit('ply', this.node.ply);
   };
 
diff --git a/ui/round/src/ctrl.ts b/ui/round/src/ctrl.ts
index 91d470df5b1fd..cda747c1e917d 100644
--- a/ui/round/src/ctrl.ts
+++ b/ui/round/src/ctrl.ts
@@ -278,7 +278,7 @@ export default class RoundController implements MoveRootCtrl {
     this.chessground.set(config);
     if (s.san && isForwardStep) site.sound.move(s);
     this.autoScroll();
-    this.auxUpdate(s.fen);
+    this.pluginUpdate(s.fen);
     site.pubsub.emit('ply', ply);
     return true;
   };
@@ -335,7 +335,7 @@ export default class RoundController implements MoveRootCtrl {
     this.redraw();
   };
 
-  auxMove = (orig: cg.Key, dest: cg.Key, role?: cg.Role) => {
+  pluginMove = (orig: cg.Key, dest: cg.Key, role?: cg.Role) => {
     if (!role) {
       this.chessground.move(orig, dest);
       // TODO look into possibility of making cg.Api.move function update player turn itself.
@@ -347,7 +347,7 @@ export default class RoundController implements MoveRootCtrl {
     this.sendMove(orig, dest, role, { premove: false });
   };
 
-  auxUpdate = (fen: string) => {
+  pluginUpdate = (fen: string) => {
     this.voiceMove?.update({ fen, canMove: this.canMove() });
     this.keyboardMove?.update({ fen, canMove: this.canMove() });
   };
@@ -501,7 +501,7 @@ export default class RoundController implements MoveRootCtrl {
     }
     this.autoScroll();
     this.onChange();
-    this.auxUpdate(step.fen);
+    this.pluginUpdate(step.fen);
     site.sound.move({ ...o, filter: 'music' });
     site.sound.saySan(step.san);
     return true; // prevents default socket pubsub
@@ -539,7 +539,7 @@ export default class RoundController implements MoveRootCtrl {
     this.autoScroll();
     this.onChange();
     this.setLoading(false);
-    this.auxUpdate(d.steps[d.steps.length - 1].fen);
+    this.pluginUpdate(d.steps[d.steps.length - 1].fen);
   };
 
   endWithData = (o: ApiEnd): void => {
diff --git a/ui/voice/src/move/moveCtrl.ts b/ui/voice/src/move/moveCtrl.ts
index 94947e9abdff3..435412df92b12 100644
--- a/ui/voice/src/move/moveCtrl.ts
+++ b/ui/voice/src/move/moveCtrl.ts
@@ -366,7 +366,7 @@ export function initModule(opts: { root: MoveRootCtrl; ui: VoiceCtrl; initial: M
     const role = cs.promo(uci) as cs.Role;
     cg.cancelMove();
     if (role) promote(cg, dest(uci), role);
-    root.auxMove(src(uci), dest(uci), role);
+    root.pluginMove(src(uci), dest(uci), role);
     return true;
   }