Remove deprecated inline thinking setting

packages/cli/src/config/settingsSchema.ts

@@ -373,16 +373,6 @@ const SETTINGS_SCHEMA = {
         description: 'Hide the window title bar',
         showInDialog: true,
       },
-      showInlineThinking: {
-        type: 'boolean',
-        label: 'Show Inline Thinking',
-        category: 'UI',
-        requiresRestart: false,
-        default: false,
-        description:
-          'Show model thinking summaries inline in the conversation (deprecated; prefer the specific thinking modes).',
-        showInDialog: false,
-      },
       showInlineThinkingFull: {
         type: 'boolean',
         label: 'Show Inline Thinking (Full)',

packages/cli/src/ui/components/MainContent.test.tsx

@@ -19,7 +19,8 @@ vi.mock('../contexts/SettingsContext.js', async () => {
     useSettings: () => ({
       merged: {
         ui: {
-          showInlineThinking: false,
+          showInlineThinkingFull: false,
+          showInlineThinkingSummary: false,
         },
       },
     }),

packages/cli/src/ui/components/QuittingDisplay.test.tsx

@@ -16,7 +16,6 @@ vi.mock('../contexts/SettingsContext.js', () => ({
   useSettings: () => ({
     merged: {
       ui: {
-        showInlineThinking: false,
         showInlineThinkingFull: false,
         showInlineThinkingSummary: false,
       },

packages/cli/src/ui/hooks/useGeminiStream.ts

@@ -82,6 +82,17 @@ import path from 'node:path';
 
 const MAX_THOUGHT_SUMMARY_LENGTH = 140;
 
+function splitGraphemes(value: string): string[] {
+  if (typeof Intl !== 'undefined' && 'Segmenter' in Intl) {
+    const segmenter = new Intl.Segmenter(undefined, {
+      granularity: 'grapheme',
+    });
+    return Array.from(segmenter.segment(value), (segment) => segment.segment);
+  }
+
+  return Array.from(value);
+}
+
 function summarizeThought(thought: ThoughtSummary): ThoughtSummary {
   const subject = thought.subject.trim();
   if (subject) {
@@ -93,12 +104,14 @@ function summarizeThought(thought: ThoughtSummary): ThoughtSummary {
     return { subject: '', description: '' };
   }
 
-  if (description.length <= MAX_THOUGHT_SUMMARY_LENGTH) {
+  const descriptionGraphemes = splitGraphemes(description);
+  if (descriptionGraphemes.length <= MAX_THOUGHT_SUMMARY_LENGTH) {
     return { subject: description, description: '' };
   }
 
-  const trimmed = description
+  const trimmed = descriptionGraphemes
     .slice(0, MAX_THOUGHT_SUMMARY_LENGTH - 3)
+    .join('')
     .trimEnd();
   return { subject: `${trimmed}...`, description: '' };
 }

packages/cli/src/ui/utils/inlineThinkingMode.ts

@@ -21,9 +21,5 @@ export function getInlineThinkingMode(
     return 'summary';
   }
 
-  if (ui?.showInlineThinking) {
-    return 'full';
-  }
-
   return 'off';
 }