Codex の際にブランチ名のサマリ処理に問題があったのを修正

src/__tests__/summarize.test.ts

@@ -43,7 +43,7 @@ beforeEach(() => {
     defaultPiece: 'default',
     logLevel: 'info',
     provider: 'claude',
-    model: 'haiku',
+    model: undefined,
   });
 });
 
@@ -68,7 +68,6 @@ describe('summarizeTaskName', () => {
       'long task name for testing',
       expect.objectContaining({
         cwd: '/project',
-        model: 'haiku',
         allowedTools: [],
       })
     );

src/infra/task/summarize.ts

@@ -64,15 +64,18 @@ export class TaskSummarizer {
 
     const globalConfig = loadGlobalConfig();
     const providerType = (globalConfig.provider as ProviderType) ?? 'claude';
-    const model = options.model ?? globalConfig.model ?? 'haiku';
+    const model = options.model ?? globalConfig.model;
 
     const provider = getProvider(providerType);
-    const response = await provider.call('summarizer', taskName, {
+    const callOptions: SummarizeOptions & { systemPrompt: string; allowedTools: [] } = {
       cwd: options.cwd,
-      model,
       systemPrompt: loadTemplate('score_slug_system_prompt', 'en'),
       allowedTools: [],
-    });
+    };
+    if (model) {
+      callOptions.model = model;
+    }
+    const response = await provider.call('summarizer', taskName, callOptions);
 
     const slug = sanitizeSlug(response.content);
     log.info('Task name summarized', { original: taskName, slug });