diff --git a/src/main.ts b/src/main.ts
index d9b6a80..db631a3 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -1170,9 +1170,18 @@ $<HTMLInputElement>('file').addEventListener('change', async (ev) => {
     setStatus(`엑셀을 읽지 못했습니다: ${(err as Error).message}`);
   }
 });
+/** The project's standing input and names (RAG/운곡교P1입력.xlsx → 프로젝트 운곡교P1, 교량 운곡교). */
+const SAMPLE_PROJECT = { name: '운곡교P1', bridge: '운곡교' } as const;
+
+function fillSampleNames(): void {
+  $<HTMLInputElement>('project-name').value = SAMPLE_PROJECT.name;
+  $<HTMLInputElement>('bridge-name').value = SAMPLE_PROJECT.bridge;
+}
+
 $<HTMLButtonElement>('pick-sample').addEventListener('click', async () => {
   try {
     loadBytes(await fetchSample(), '샘플 P1 (운곡교P1입력.xlsx)');
+    fillSampleNames();
   } catch (err) {
     setStatus(`샘플을 불러오지 못했습니다: ${(err as Error).message}`);
   }
@@ -1251,8 +1260,7 @@ if (new URLSearchParams(window.location.search).get('sample') === '1') {
   fetchSample()
     .then((bytes) => {
       loadBytes(bytes, '샘플 P1');
-      $<HTMLInputElement>('project-name').value = '운곡교 P1 샘플';
-      $<HTMLInputElement>('bridge-name').value = '운곡교';
+      fillSampleNames();
       applyImport();
     })
     .catch((err: Error) => setStatus(`샘플을 불러오지 못했습니다: ${err.message}`));
diff --git a/tests/sample-input.test.ts b/tests/sample-input.test.ts
new file mode 100644
index 0000000..6a9811a
--- /dev/null
+++ b/tests/sample-input.test.ts
@@ -0,0 +1,25 @@
+import { describe, expect, it } from 'vitest';
+import { existsSync, readFileSync } from 'node:fs';
+import { fileURLToPath } from 'node:url';
+import { parseWorkbook } from '../src/core/parseWorkbook';
+import { loadWorkbook } from './helpers';
+
+// The standing input is RAG/운곡교P1입력.xlsx. The app serves a copy in public/samples; the two must stay identical.
+const RAG_INPUT = fileURLToPath(new URL('../../../RAG/운곡교P1입력.xlsx', import.meta.url));
+const APP_COPY = fileURLToPath(new URL('../public/samples/운곡교P1입력.xlsx', import.meta.url));
+
+describe('표준 입력 파일 (운곡교P1입력.xlsx)', () => {
+  it('the app sample is byte-identical to RAG/운곡교P1입력.xlsx', () => {
+    if (!existsSync(RAG_INPUT)) return; // RAG folder not present in this checkout
+    expect(readFileSync(APP_COPY).equals(readFileSync(RAG_INPUT))).toBe(true);
+  });
+
+  it('reads one pier, P1, T형, 말뚝기초, with 10 bearings', () => {
+    const { piers, issues } = parseWorkbook(loadWorkbook());
+    expect(issues).toEqual([]);
+    expect(piers.map((p) => p.name)).toEqual(['P1']);
+    expect(piers[0].type).toBe('T형');
+    expect(piers[0].foundationType).toBe('말뚝기초');
+    expect(piers[0].bearings).toHaveLength(10);
+  });
+});