sync: update from private repo (6fcb0d0)

src/engine/tools/office.test.ts

@@ -358,4 +358,27 @@ describe('Read* tools — format mismatch rejection (issue #246)', () => {
     expect(result?.isError).toBe(false);
     expect(result?.output).toContain('Sheet1');
   });
+
+  it('ReadExcel includes a Styles section only when include_styles=true', async () => {
+    workspacePath = makeWorkspace();
+    fs.mkdirSync(path.join(workspacePath, 'input'), { recursive: true });
+
+    const ExcelJS = (await import('exceljs')).default;
+    const wb = new ExcelJS.Workbook();
+    const ws = wb.addWorksheet('Sheet1');
+    ws.getCell('A1').value = 'Header';
+    ws.getCell('A1').fill = { type: 'pattern', pattern: 'solid', fgColor: { argb: 'FFFFF2CC' } };
+    ws.getCell('A1').font = { bold: true };
+    await wb.xlsx.writeFile(path.join(workspacePath, 'input', 'styled.xlsx'));
+
+    // Without include_styles: no Styles section (backward compat)
+    const plain = await executeTool('ReadExcel', { path: 'input/styled.xlsx' }, makeContext(workspacePath));
+    expect(plain!.output).not.toContain('### Styles');
+
+    // With include_styles: Styles section present with fill color and font bold
+    const styled = await executeTool('ReadExcel', { path: 'input/styled.xlsx', include_styles: true }, makeContext(workspacePath));
+    expect(styled!.output).toContain('### Styles');
+    expect(styled!.output).toContain('#FFF2CC');
+    expect(styled!.output).toMatch(/bold/);
+  });
 });