diff --git a/server/hono/src/index.ts b/server/hono/src/index.ts
index 93be1fe..3086c3f 100644
--- a/server/hono/src/index.ts
+++ b/server/hono/src/index.ts
@@ -2,8 +2,9 @@ import { Hono } from 'hono'
 import type { HonoConfig } from './config/hono'
 import { middleware } from './middleware'
 import v1 from './routes/v1'
+import llms from './routes/llms'
 
-const app = new Hono<HonoConfig>().route('*', middleware).route('/v1', v1)
+const app = new Hono<HonoConfig>().route('*', middleware).route('/v1', v1).route('/llms.txt', llms)
 
 export default app
 
diff --git a/server/hono/src/routes/llms.test.ts b/server/hono/src/routes/llms.test.ts
new file mode 100644
index 0000000..ccec498
--- /dev/null
+++ b/server/hono/src/routes/llms.test.ts
@@ -0,0 +1,65 @@
+import app from '../index'; // Adjusted path from ../../src/index
+
+// Mocking a simple test structure
+const describe = (description: string, fn: () => void) => {
+  console.log(description);
+  fn();
+};
+
+const it = (description: string, fn: () => Promise<void> | void) => {
+  console.log(`  ${description}`);
+  return Promise.resolve(fn()).catch(err => {
+    console.error(`    FAILED: ${err.message}`);
+    process.exitCode = 1; 
+  });
+};
+
+const expect = (actual: any) => ({
+  toBe: (expected: any) => {
+    if (actual !== expected) {
+      throw new Error(`Expected ${JSON.stringify(actual)} to be ${JSON.stringify(expected)}`);
+    }
+    console.log('    PASSED');
+  },
+  toContain: (expectedSubstring: string) => {
+    if (typeof actual !== 'string' || !actual.includes(expectedSubstring)) {
+      throw new Error(`Expected "${actual}" to contain "${expectedSubstring}"`);
+    }
+    console.log('    PASSED');
+  },
+  toBeGreaterThan: (expected: number) => {
+    if (typeof actual !== 'number' || actual <= expected) {
+      throw new Error(`Expected ${actual} to be greater than ${expected}`);
+    }
+    console.log('    PASSED');
+  }
+});
+
+describe('GET /llms.txt', () => {
+  it('should return profile information in Markdown format', async () => {
+    const res = await app.request('/llms.txt');
+    
+    expect(res.status).toBe(200);
+    expect(res.headers.get('Content-Type')).toBe('text/markdown; charset=UTF-8');
+    
+    const text = await res.text();
+    expect(text.length).toBeGreaterThan(0);
+    expect(text).toContain('# oidon. - umaidashi');
+    expect(text).toContain('## About');
+    expect(text).toContain('## Skills');
+    expect(text).toContain('Go'); // Example skill
+    expect(text).toContain('### Languages');
+    expect(text).toContain('Gin'); // Example framework
+    expect(text).toContain('Prisma'); // Example library
+    expect(text).toContain('PostgreSQL'); // Example RDBMS
+    expect(text).toContain('Neovim'); // Example Other
+  });
+});
+
+// Helper to run tests if this file is executed directly (e.g., with bun run server/hono/src/routes/llms.test.ts)
+// This is a simplified runner. A proper test runner like vitest or jest would be better.
+if (import.meta.path === process.argv[1] || import.meta.path.endsWith('.ts')) {
+  console.log('Running tests...');
+  // Potentially, one would aggregate test results here.
+  // For now, errors are logged and process.exitCode is set.
+}
diff --git a/server/hono/src/routes/llms.ts b/server/hono/src/routes/llms.ts
new file mode 100644
index 0000000..23ec210
--- /dev/null
+++ b/server/hono/src/routes/llms.ts
@@ -0,0 +1,47 @@
+import { Hono } from 'hono';
+
+const app = new Hono();
+
+const markdownContent = `
+# oidon. - umaidashi
+
+## About
+
+| key          | value                     |
+|--------------|---------------------------|
+| Name         | Oishi Yuma                |
+| Birth Day    | 2002.11.18                |
+| Hometown     | Fukuoka                   |
+| University   | Meiji.univ                |
+| Workplace    | BuySell Technologies      |
+| Display Name | ['umaidashi', 'oidon', 'yoishi'] |
+
+## Skills
+
+### Languages
+
+Go, TypeScript, JavaScript, C, Python, Ruby, Zsh, Dart, Swift, R, Pug, Sass, Rust, Terraform
+
+### Frameworks
+
+Gin, React, Next.js, Hono, Astro, Remix, Django, Flask, Ruby on Rails, Flutter
+
+### Libraries
+
+Prisma, Drizzle, Zod, MUI, shadcn/ui, GraphQL, styled-components
+
+### RDBMS / BaaS
+
+PostgreSQL, PlanetScale, Supabase, MySQL
+
+### Others
+
+Neovim, Vim, Vercel, Render, Sentry, Datadog, New Relic, Debian, Linux, Slack, Discord, Sketch, Figma, GitHub, GitHub Actions, Docker, Google Cloud, Google BigQuery, Google Cloud Storage, Postman, Jira, Jira Software
+`;
+
+app.get('/', (c) => {
+  c.header('Content-Type', 'text/markdown; charset=UTF-8');
+  return c.text(markdownContent);
+});
+
+export default app;