diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3f7d4aee..e713e592 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -94,3 +94,27 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - run: node -e "const fs=require('fs'); const dir='deploy/grafana/dashboards'; fs.readdirSync(dir).filter(f=>f.endsWith('.json')).forEach(f=>{const d=JSON.parse(fs.readFileSync(dir+'/'+f,'utf8'));if(!d.uid||!d.schemaVersion)throw new Error('missing uid/schemaVersion in '+f);if(!d.templating||!d.templating.list.some(v=>v.name==='organization_id'))throw new Error('missing organization_id variable in '+f);console.log('OK',f)})"
+
+  docs:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: docs
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+      - name: Install dependencies
+        run: npm install
+      - name: Validate frontmatter
+        run: npx tsx scripts/validate-frontmatter.ts
+      - name: Build static site
+        run: npm run build
+      - name: Generate Pagefind index
+        run: npx pagefind --site out
+      - name: Check dead links
+        uses: lycheeverse/lychee-action@v2
+        with:
+          args: --offline --include-fragments --root-dir docs/out --fallback-extensions html --exclude-path docs/out/404.html './docs/out/**/*.html'
+          fail: true
diff --git a/docs/__tests__/scripts/validate-frontmatter.test.ts b/docs/__tests__/scripts/validate-frontmatter.test.ts
new file mode 100644
index 00000000..1fc56134
--- /dev/null
+++ b/docs/__tests__/scripts/validate-frontmatter.test.ts
@@ -0,0 +1,71 @@
+import fs from "fs";
+import os from "os";
+import path from "path";
+import { afterEach, describe, expect, it } from "vitest";
+import {
+  validateFrontmatter,
+  validateFrontmatterOrThrow,
+} from "../../scripts/validate-frontmatter";
+
+const tempDirs: string[] = [];
+
+function createTempPagesDir(): string {
+  const dir = fs.mkdtempSync(path.join(os.tmpdir(), "mdx-frontmatter-"));
+  tempDirs.push(dir);
+  return dir;
+}
+
+afterEach(() => {
+  for (const dir of tempDirs.splice(0)) {
+    fs.rmSync(dir, { recursive: true, force: true });
+  }
+});
+
+describe("validateFrontmatter", () => {
+  it("returns an error when title is missing", () => {
+    const pagesDir = createTempPagesDir();
+    fs.writeFileSync(
+      path.join(pagesDir, "missing-title.mdx"),
+      "---\ndescription: test\n---\n# Hello",
+    );
+
+    const result = validateFrontmatter(pagesDir);
+
+    expect(result.errors).toHaveLength(1);
+    expect(result.errors[0]?.message).toMatch(/title/i);
+    expect(() => validateFrontmatterOrThrow(pagesDir)).toThrow(/title/i);
+  });
+
+  it("succeeds when title is present", () => {
+    const pagesDir = createTempPagesDir();
+    fs.writeFileSync(
+      path.join(pagesDir, "valid.mdx"),
+      "---\ntitle: Hello World\n---\n# Hello",
+    );
+
+    const result = validateFrontmatter(pagesDir);
+
+    expect(result.errors).toHaveLength(0);
+    expect(result.successCount).toBe(1);
+    expect(validateFrontmatterOrThrow(pagesDir).successCount).toBe(1);
+  });
+
+  it("flags draft pages in production mode", () => {
+    const pagesDir = createTempPagesDir();
+    fs.writeFileSync(
+      path.join(pagesDir, "draft.mdx"),
+      "---\ntitle: Draft Page\ndraft: true\n---\n# Draft",
+    );
+
+    const devResult = validateFrontmatter(pagesDir, { production: false });
+    const prodResult = validateFrontmatter(pagesDir, { production: true });
+
+    expect(devResult.errors).toHaveLength(0);
+    expect(devResult.successCount).toBe(1);
+    expect(prodResult.errors).toHaveLength(1);
+    expect(prodResult.errors[0]?.message).toMatch(/draft/i);
+    expect(() =>
+      validateFrontmatterOrThrow(pagesDir, { production: true }),
+    ).toThrow(/draft/i);
+  });
+});
diff --git a/docs/components/EditPageLink.tsx b/docs/components/EditPageLink.tsx
index d8b2ddf0..e4ba2406 100644
--- a/docs/components/EditPageLink.tsx
+++ b/docs/components/EditPageLink.tsx
@@ -1,12 +1,12 @@
-import { useConfig } from 'nextra-theme-docs';
-
 type EditPageLinkProps = {
   filePath: string;
 };
 
+const DOCS_REPOSITORY_BASE =
+  'https://github.com/Corevice/open-git/blob/main/docs';
+
 export function EditPageLink({ filePath }: EditPageLinkProps) {
-  const { docsRepositoryBase } = useConfig();
-  const href = `${docsRepositoryBase}/tree/main/${filePath}`;
+  const href = `${DOCS_REPOSITORY_BASE}/${filePath}`;
 
   return <a href={href}>このページを編集</a>;
 }
diff --git a/docs/next.config.mjs b/docs/next.config.mjs
index 95d7253b..4815af26 100644
--- a/docs/next.config.mjs
+++ b/docs/next.config.mjs
@@ -8,8 +8,9 @@ const withNextra = nextra({
 /** @type {import('next').NextConfig} */
 const nextConfig = {
   output: 'export',
-  // Static export (required so the Pagefind postbuild can index `out/`) is not
-  // compatible with the default next/image optimization loader.
+  // Static export to `out/` (so the Pagefind postbuild and the docs CI
+  // workflow can index it) is not compatible with the default next/image
+  // optimization loader.
   images: {
     unoptimized: true,
   },
diff --git a/docs/package.json b/docs/package.json
index 67e3c589..32591720 100644
--- a/docs/package.json
+++ b/docs/package.json
@@ -7,18 +7,21 @@
     "build": "next build",
     "start": "next start",
     "lint": "next lint",
+    "validate-frontmatter": "tsx scripts/validate-frontmatter.ts",
+    "check-links": "blc http://localhost:3000 -ro --filter-level 3",
     "test": "vitest run",
+    "typecheck": "tsc --noEmit",
     "postbuild": "pagefind --site out"
   },
   "dependencies": {
+    "gray-matter": "^4.0.3",
     "next": "^15.0.0",
     "nextra": "^3.0.0",
     "nextra-theme-docs": "^3.0.0",
+    "next-themes": "^0.4.0",
     "prismjs": "^1.29.0",
     "react": "^19.0.0",
-    "react-dom": "^19.0.0",
-    "next-themes": "^0.4.0",
-    "gray-matter": "^4.0.3"
+    "react-dom": "^19.0.0"
   },
   "devDependencies": {
     "@testing-library/jest-dom": "^6.0.0",
@@ -29,9 +32,16 @@
     "@types/react": "^19.0.0",
     "@types/react-dom": "^19.0.0",
     "@vitejs/plugin-react": "^4.0.0",
+    "broken-link-checker": "^0.7.8",
     "jsdom": "^25.0.0",
-    "pagefind": "^1.1.0",
+    "pagefind": "^1.3.0",
+    "tsx": "^4.19.0",
     "typescript": "^5.4.0",
     "vitest": "^2.0.0"
+  },
+  "allowScripts": {
+    "esbuild@0.28.1": true,
+    "esbuild@0.21.5": true,
+    "sharp@0.34.5": true
   }
 }
diff --git a/docs/pages/contributing/index.mdx b/docs/pages/contributing/index.mdx
index 96bd2281..3bdef761 100644
--- a/docs/pages/contributing/index.mdx
+++ b/docs/pages/contributing/index.mdx
@@ -12,7 +12,7 @@ Issue の報告、Pull Request の提出、ドキュメントの改善など、
 
 ## ライセンス
 
-本プロジェクトは [LICENSE](/LICENSE) ファイルに記載されたライセンスの下で提供されています。コントリビューションを行う前にライセンス条項をご確認ください。
+本プロジェクトは [LICENSE](https://github.com/Corevice/open-git/blob/main/LICENSE) ファイルに記載されたライセンスの下で提供されています。コントリビューションを行う前にライセンス条項をご確認ください。
 
 ## 関連リンク
 
diff --git a/docs/scripts/validate-frontmatter.ts b/docs/scripts/validate-frontmatter.ts
new file mode 100644
index 00000000..b089c2bf
--- /dev/null
+++ b/docs/scripts/validate-frontmatter.ts
@@ -0,0 +1,115 @@
+import fs from "fs";
+import path from "path";
+import matter from "gray-matter";
+
+export interface ValidationError {
+  file: string;
+  message: string;
+}
+
+export interface ValidationResult {
+  errors: ValidationError[];
+  successCount: number;
+}
+
+export interface ValidateOptions {
+  production?: boolean;
+}
+
+function isProduction(options: ValidateOptions): boolean {
+  if (options.production !== undefined) {
+    return options.production;
+  }
+  return process.env.NODE_ENV === "production";
+}
+
+function walkMdxFiles(dir: string, files: string[] = []): string[] {
+  if (!fs.existsSync(dir)) {
+    return files;
+  }
+
+  for (const entry of fs.readdirSync(dir, { withFileTypes: true })) {
+    const fullPath = path.join(dir, entry.name);
+    if (entry.isDirectory()) {
+      walkMdxFiles(fullPath, files);
+    } else if (entry.isFile() && entry.name.endsWith(".mdx")) {
+      files.push(fullPath);
+    }
+  }
+
+  return files;
+}
+
+export function validateFrontmatter(
+  pagesDir: string,
+  options: ValidateOptions = {},
+): ValidationResult {
+  const production = isProduction(options);
+  const errors: ValidationError[] = [];
+  let successCount = 0;
+
+  for (const filePath of walkMdxFiles(pagesDir)) {
+    const content = fs.readFileSync(filePath, "utf8");
+    const { data } = matter(content);
+
+    const title = data.title;
+    if (typeof title !== "string" || title.trim() === "") {
+      errors.push({
+        file: filePath,
+        message: 'Missing required "title" in frontmatter',
+      });
+      continue;
+    }
+
+    if (production && data.draft === true) {
+      errors.push({
+        file: filePath,
+        message: "Draft pages are not allowed in production builds",
+      });
+      continue;
+    }
+
+    successCount++;
+  }
+
+  return { errors, successCount };
+}
+
+export function validateFrontmatterOrThrow(
+  pagesDir: string,
+  options: ValidateOptions = {},
+): ValidationResult {
+  const result = validateFrontmatter(pagesDir, options);
+  if (result.errors.length > 0) {
+    const details = result.errors
+      .map((error) => `${error.file}: ${error.message}`)
+      .join("\n");
+    throw new Error(`Frontmatter validation failed:\n${details}`);
+  }
+  return result;
+}
+
+function main(): void {
+  const pagesDir = path.join(process.cwd(), "pages");
+  const result = validateFrontmatter(pagesDir);
+
+  if (result.errors.length > 0) {
+    console.error("Frontmatter validation failed:");
+    for (const error of result.errors) {
+      console.error(`  ${error.file}: ${error.message}`);
+    }
+    process.exit(1);
+  }
+
+  console.log(
+    `Frontmatter validation passed: ${result.successCount} file(s) checked`,
+  );
+}
+
+const isMainModule =
+  process.argv[1] !== undefined &&
+  path.resolve(process.argv[1]) === path.resolve(__filename);
+
+if (isMainModule) {
+  main();
+}