Fixed the choice dialog (e.g. /model) endlessly flickering and resizing when not all menu items fit on screen

CHANGELOG.md

@@ -1,3 +1,4 @@
+- Fixed the choice dialog (e.g. /model) endlessly flickering and resizing when not all menu items fit on screen
 # 1.3.20 (2026-10-04)
 
 - Fixed switching the edit mode (e.g. to Auto Mode) while a prompt was still running sometimes cycling through several modes and landing on the wrong one instead of the one selected

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>io.github.nbplugins</groupId>
     <artifactId>netbeans-plugin-claude-code-gui</artifactId>
-    <version>1.3.37-SNAPSHOT</version>
+    <version>1.3.38-SNAPSHOT</version>
     <packaging>nbm</packaging>
     <name>Netbeans Plugin Claude Code GUI</name>
     <description>NetBeans plugin that provides a GUI for Claude Code CLI — run claude code sessions directly inside the IDE.</description>

src/main/java/io/github/nbplugins/claudecodegui/controller/ClaudeSessionController.java

@@ -1438,7 +1438,7 @@ private void applyDetectedChoiceMenu(ChoiceMenuModel newMenu, String logTag) {
             model.setActiveChoiceMenu(newMenu);
             return;
         }
-        if (sameMenu(newMenu, current)) {
+        if (sameMenu(newMenu, current) || isShrunkViewOf(newMenu, current)) {
             pendingChoiceMenuCandidate = null;
             return;
         }
@@ -1452,6 +1452,28 @@ private void applyDetectedChoiceMenu(ChoiceMenuModel newMenu, String logTag) {
         }
     }
 
+    /**
+     * Returns {@code true} when {@code newMenu} is just a shorter window onto the same
+     * scrolling list as {@code current} (same question, options are a strict prefix).
+     *
+     * <p>Scrolling pickers such as {@code /model} draw as many items as fit the terminal.
+     * The choice panel shrinks the terminal, which makes Claude draw fewer items, which
+     * shrinks the panel, which grows the terminal again — an endless flicker. Keeping
+     * the larger option list breaks that loop.
+     */
+    static boolean isShrunkViewOf(ChoiceMenuModel newMenu, ChoiceMenuModel current) {
+        List<ChoiceMenuModel.Option> n = newMenu.options();
+        List<ChoiceMenuModel.Option> c = current.options();
+        if (!newMenu.text().equals(current.text()) || n.size() >= c.size()) return false;
+        for (int i = 0; i < n.size(); i++) {
+            if (!n.get(i).display().equals(c.get(i).display())
+                    || !n.get(i).response().equals(c.get(i).response())) {
+                return false;
+            }
+        }
+        return true;
+    }
+
     private static boolean sameMenu(ChoiceMenuModel a, ChoiceMenuModel b) {
         return a.text().equals(b.text()) && optionsEqual(a.options(), b.options());
     }

src/test/java/io/github/nbplugins/claudecodegui/controller/ClaudeSessionControllerTest.java

@@ -38,6 +38,36 @@ void setUp() {
     // onClaudeIdle
     // -------------------------------------------------------------------------
 
+    private static ChoiceMenuModel menu(String text, String... displays) {
+        List<ChoiceMenuModel.Option> opts = new java.util.ArrayList<>();
+        for (int i = 0; i < displays.length; i++) {
+            opts.add(new ChoiceMenuModel.Option(displays[i], String.valueOf(i + 1)));
+        }
+        return new ChoiceMenuModel(text, opts, 0);
+    }
+
+    @Test
+    void isShrunkViewOf_prefixOfScrollingList_true() {
+        ChoiceMenuModel full = menu("Select model", "a", "b", "c", "d");
+        ChoiceMenuModel shrunk = menu("Select model", "a", "b", "c");
+        assertTrue(ClaudeSessionController.isShrunkViewOf(shrunk, full));
+    }
+
+    @Test
+    void isShrunkViewOf_sameSizeOrGrown_false() {
+        ChoiceMenuModel three = menu("Select model", "a", "b", "c");
+        ChoiceMenuModel four = menu("Select model", "a", "b", "c", "d");
+        assertFalse(ClaudeSessionController.isShrunkViewOf(three, three));
+        assertFalse(ClaudeSessionController.isShrunkViewOf(four, three));
+    }
+
+    @Test
+    void isShrunkViewOf_differentTextOrOptions_false() {
+        ChoiceMenuModel full = menu("Select model", "a", "b", "c", "d");
+        assertFalse(ClaudeSessionController.isShrunkViewOf(menu("Other", "a", "b", "c"), full));
+        assertFalse(ClaudeSessionController.isShrunkViewOf(menu("Select model", "a", "x", "c"), full));
+    }
+
     @Test
     void onClaudeIdleSetsLifecycleToReady() {
         model.setLifecycle(SessionLifecycle.WORKING);