feat: sitemap validattion

2026-02-21 14:26:06 +01:00
parent d651049659
commit bca3da1587
28 changed files with 1124 additions and 14 deletions
--- a/src/main/engine/BlogGenerationEngine.ts
+++ b/src/main/engine/BlogGenerationEngine.ts
@@ -56,6 +56,21 @@ export interface BlogGenerationResult {
  };
 }

+export interface SiteValidationReport {
+  sitemapPath: string;
+  sitemapChanged: boolean;
+  missingUrlPaths: string[];
+  extraUrlPaths: string[];
+  expectedUrlCount: number;
+  existingHtmlUrlCount: number;
+}
+
+export interface SiteValidationApplyResult {
+  renderedUrlCount: number;
+  deletedUrlCount: number;
+  removedEmptyDirCount: number;
+}
+
 export function resolvePublicBaseUrl(publicUrl?: string): string | null {
  const trimmed = (publicUrl || '').trim();
  if (!trimmed) {
@@ -141,9 +156,21 @@ function buildSitemapUrl(
  changefreq: 'always' | 'hourly' | 'daily' | 'weekly' | 'monthly' | 'yearly' | 'never',
  priority: string,
 ): string {
+  const canonicalLoc = (() => {
+    try {
+      const parsed = new URL(loc);
+      if (!parsed.pathname.endsWith('/')) {
+        parsed.pathname = `${parsed.pathname}/`;
+      }
+      return parsed.toString();
+    } catch {
+      return loc.endsWith('/') ? loc : `${loc}/`;
+    }
+  })();
+
  return [
    '  <url>',
-    `    <loc>${escapeXml(loc)}</loc>`,
+    `    <loc>${escapeXml(canonicalLoc)}</loc>`,
    `    <lastmod>${escapeXml(lastmod)}</lastmod>`,
    `    <changefreq>${changefreq}</changefreq>`,
    `    <priority>${priority}</priority>`,
@@ -151,6 +178,78 @@ function buildSitemapUrl(
  ].join('\n');
 }

+function normalizeUrlPath(urlPath: string): string {
+  const trimmed = (urlPath || '').trim();
+  if (!trimmed || trimmed === '/') {
+    return '/';
+  }
+
+  const noQuery = trimmed.split('?')[0]?.split('#')[0] ?? '';
+  const withoutSlashes = noQuery.replace(/^\/+|\/+$/g, '');
+  return withoutSlashes ? `/${withoutSlashes}` : '/';
+}
+
+function urlPathToHtmlIndexPath(htmlDir: string, urlPath: string): string {
+  const normalizedPath = normalizeUrlPath(urlPath);
+  if (normalizedPath === '/') {
+    return path.join(htmlDir, 'index.html');
+  }
+
+  return path.join(htmlDir, normalizedPath.slice(1), 'index.html');
+}
+
+function sitemapLocToProjectPath(loc: string, baseUrl: string): string {
+  try {
+    const locUrl = new URL(loc);
+    const base = new URL(baseUrl);
+    const locPath = locUrl.pathname.replace(/\/+$/, '');
+    const basePath = base.pathname.replace(/\/+$/, '');
+
+    if (basePath && locPath.startsWith(basePath)) {
+      const stripped = locPath.slice(basePath.length);
+      return normalizeUrlPath(stripped || '/');
+    }
+
+    return normalizeUrlPath(locPath || '/');
+  } catch {
+    return normalizeUrlPath(loc);
+  }
+}
+
+function extractSitemapLocs(sitemapXml: string): string[] {
+  const matches = sitemapXml.matchAll(/<loc>(.*?)<\/loc>/g);
+  const locs: string[] = [];
+  for (const match of matches) {
+    const value = match[1]?.trim();
+    if (value) {
+      locs.push(value);
+    }
+  }
+  return locs;
+}
+
+function appendPaginatedSitemapUrls(
+  target: string[],
+  baseUrl: string,
+  basePath: string,
+  totalItems: number,
+  maxPostsPerPage: number,
+  lastmod: string,
+  changefreq: 'always' | 'hourly' | 'daily' | 'weekly' | 'monthly' | 'yearly' | 'never',
+  priority: string,
+): void {
+  if (totalItems <= 0) {
+    return;
+  }
+
+  const totalPages = Math.max(1, Math.ceil(totalItems / maxPostsPerPage));
+  for (let page = 2; page <= totalPages; page += 1) {
+    const normalizedBase = basePath.replace(/\/+$/, '');
+    const pagePath = `${normalizedBase}/page/${page}`;
+    target.push(buildSitemapUrl(`${baseUrl}${pagePath}`, lastmod, changefreq, priority));
+  }
+}
+
 function splitParagraphs(markdown: string | null | undefined): string[] {
  const normalizedMarkdown = typeof markdown === 'string' ? markdown : '';
  return normalizedMarkdown
@@ -299,6 +398,7 @@ export class BlogGenerationEngine {
    const years = new Map<number, Date>();
    const yearMonthDays = new Map<string, Date>();
    const postUrls: Array<{ loc: string; lastmod: string }> = [];
+    const pageUrls: Array<{ loc: string; lastmod: string }> = [];

    for (const post of publishedPosts) {
      const createdAt = resolvePostCreatedAt(post);
@@ -306,6 +406,17 @@ export class BlogGenerationEngine {
      const postUrl = `${options.baseUrl}${canonicalPath}`;
      const updatedAt = post.updatedAt;
      postUrls.push({ loc: postUrl, lastmod: updatedAt.toISOString() });
+
+      const categories = Array.isArray(post.categories) ? post.categories : [];
+      if (categories.includes('page')) {
+        const trimmedSlug = (post.slug || '').replace(/^\/+|\/+$/g, '');
+        if (trimmedSlug.length > 0) {
+          pageUrls.push({
+            loc: `${options.baseUrl}/${trimmedSlug}`,
+            lastmod: updatedAt.toISOString(),
+          });
+        }
+      }
    }

    for (const post of publishedListPosts) {
@@ -338,26 +449,58 @@ export class BlogGenerationEngine {

    const urls: string[] = [];
    urls.push(buildSitemapUrl(`${options.baseUrl}/`, latestPostUpdatedAt, 'daily', '1.0'));
+    appendPaginatedSitemapUrls(urls, options.baseUrl, '', publishedListPosts.length, maxPostsPerPage, latestPostUpdatedAt, 'daily', '0.9');
    for (const post of postUrls) {
      urls.push(buildSitemapUrl(post.loc, post.lastmod, 'monthly', '0.8'));
    }
+    for (const page of pageUrls) {
+      urls.push(buildSitemapUrl(page.loc, page.lastmod, 'weekly', '0.7'));
+    }

    for (const [year, lastmod] of Array.from(years.entries()).sort((a, b) => b[0] - a[0])) {
      urls.push(buildSitemapUrl(`${options.baseUrl}/${year}`, lastmod.toISOString(), 'monthly', '0.5'));
+
+      const yearCount = publishedListPosts.filter((post) => resolvePostCreatedAt(post).getFullYear() === year).length;
+      appendPaginatedSitemapUrls(urls, options.baseUrl, `/${year}`, yearCount, maxPostsPerPage, lastmod.toISOString(), 'monthly', '0.4');
    }
    for (const [ym, lastmod] of Array.from(yearMonths.entries()).sort().reverse()) {
      urls.push(buildSitemapUrl(`${options.baseUrl}/${ym}`, lastmod.toISOString(), 'monthly', '0.5'));
+
+      const [yearStr, monthStr] = ym.split('/');
+      const year = Number(yearStr);
+      const month = Number(monthStr);
+      const monthCount = publishedListPosts.filter((post) => {
+        const d = resolvePostCreatedAt(post);
+        return d.getFullYear() === year && (d.getMonth() + 1) === month;
+      }).length;
+      appendPaginatedSitemapUrls(urls, options.baseUrl, `/${ym}`, monthCount, maxPostsPerPage, lastmod.toISOString(), 'monthly', '0.4');
    }
    for (const [ymd, lastmod] of Array.from(yearMonthDays.entries()).sort().reverse()) {
      urls.push(buildSitemapUrl(`${options.baseUrl}/${ymd}`, lastmod.toISOString(), 'monthly', '0.4'));
+
+      const [yearStr, monthStr, dayStr] = ymd.split('/');
+      const year = Number(yearStr);
+      const month = Number(monthStr);
+      const day = Number(dayStr);
+      const dayCount = publishedListPosts.filter((post) => {
+        const d = resolvePostCreatedAt(post);
+        return d.getFullYear() === year && (d.getMonth() + 1) === month && d.getDate() === day;
+      }).length;
+      appendPaginatedSitemapUrls(urls, options.baseUrl, `/${ymd}`, dayCount, maxPostsPerPage, lastmod.toISOString(), 'monthly', '0.3');
    }

    for (const category of Array.from(allCategories).sort()) {
      urls.push(buildSitemapUrl(`${options.baseUrl}/category/${encodeURIComponent(category)}`, latestPostUpdatedAt, 'weekly', '0.6'));
+
+      const categoryCount = publishedListPosts.filter((post) => (post.categories || []).includes(category)).length;
+      appendPaginatedSitemapUrls(urls, options.baseUrl, `/category/${encodeURIComponent(category)}`, categoryCount, maxPostsPerPage, latestPostUpdatedAt, 'weekly', '0.5');
    }

    for (const tag of Array.from(allTags).sort()) {
      urls.push(buildSitemapUrl(`${options.baseUrl}/tag/${encodeURIComponent(tag)}`, latestPostUpdatedAt, 'weekly', '0.6'));
+
+      const tagCount = publishedListPosts.filter((post) => (post.tags || []).includes(tag)).length;
+      appendPaginatedSitemapUrls(urls, options.baseUrl, `/tag/${encodeURIComponent(tag)}`, tagCount, maxPostsPerPage, latestPostUpdatedAt, 'weekly', '0.5');
    }

    onProgress(8, 'Building RSS and Atom feeds...');
@@ -568,6 +711,367 @@ export class BlogGenerationEngine {
    };
  }

+  async validateSite(
+    options: BlogGenerationOptions,
+    onProgress: (progress: number, message?: string) => void,
+  ): Promise<SiteValidationReport> {
+    onProgress(0, 'Collecting sitemap URLs...');
+
+    const maxPostsPerPage = clampMaxPostsPerPage(options.maxPostsPerPage);
+    const categorySettings = resolveCategorySettings(options.categorySettings);
+    const listExcludedCategories = Object.entries(categorySettings)
+      .filter(([, settings]) => settings.renderInLists === false)
+      .map(([category]) => category);
+
+    const publishedCandidates = await this.postEngine.getPostsFiltered({ status: 'published' });
+    const draftCandidates = await this.postEngine.getPostsFiltered({ status: 'draft' });
+    const publishedListCandidates = await this.postEngine.getPostsFiltered({
+      status: 'published',
+      excludeCategories: listExcludedCategories,
+    });
+    const draftListCandidates = await this.postEngine.getPostsFiltered({
+      status: 'draft',
+      excludeCategories: listExcludedCategories,
+    });
+
+    const publishedSnapshots = await Promise.all(
+      publishedCandidates.map(async (post) => {
+        const snapshot = await this.postEngine.getPublishedVersion(post.id);
+        return snapshot || post;
+      }),
+    );
+    const draftPublishedSnapshots = await Promise.all(
+      draftCandidates.map(async (post) => this.postEngine.getPublishedVersion(post.id)),
+    );
+    const publishedListSnapshots = await Promise.all(
+      publishedListCandidates.map(async (post) => {
+        const snapshot = await this.postEngine.getPublishedVersion(post.id);
+        return snapshot || post;
+      }),
+    );
+    const draftListPublishedSnapshots = await Promise.all(
+      draftListCandidates.map(async (post) => this.postEngine.getPublishedVersion(post.id)),
+    );
+
+    const publishedPostById = new Map<string, PostData>();
+    for (const post of publishedSnapshots) {
+      publishedPostById.set(post.id, post);
+    }
+    for (const snapshot of draftPublishedSnapshots) {
+      if (snapshot) {
+        publishedPostById.set(snapshot.id, snapshot);
+      }
+    }
+
+    const publishedPosts = Array.from(publishedPostById.values())
+      .sort((a, b) => b.createdAt.getTime() - a.createdAt.getTime());
+
+    const publishedListPostById = new Map<string, PostData>();
+    for (const post of publishedListSnapshots) {
+      publishedListPostById.set(post.id, post);
+    }
+    for (const snapshot of draftListPublishedSnapshots) {
+      if (snapshot) {
+        publishedListPostById.set(snapshot.id, snapshot);
+      }
+    }
+    const publishedListPosts = Array.from(publishedListPostById.values())
+      .sort((a, b) => b.createdAt.getTime() - a.createdAt.getTime());
+
+    const now = new Date().toISOString();
+    const allTags = new Set<string>();
+    const allCategories = new Set<string>();
+    const yearMonths = new Map<string, Date>();
+    const years = new Map<number, Date>();
+    const yearMonthDays = new Map<string, Date>();
+    const postUrls: Array<{ loc: string; lastmod: string }> = [];
+    const pageUrls: Array<{ loc: string; lastmod: string }> = [];
+
+    for (const post of publishedPosts) {
+      const createdAt = resolvePostCreatedAt(post);
+      const canonicalPath = buildCanonicalPreviewPath(createdAt, post.slug);
+      const postUrl = `${options.baseUrl}${canonicalPath}`;
+      const updatedAt = post.updatedAt;
+      postUrls.push({ loc: postUrl, lastmod: updatedAt.toISOString() });
+
+      const categories = Array.isArray(post.categories) ? post.categories : [];
+      if (categories.includes('page')) {
+        const trimmedSlug = (post.slug || '').replace(/^\/+|\/+$/g, '');
+        if (trimmedSlug.length > 0) {
+          pageUrls.push({
+            loc: `${options.baseUrl}/${trimmedSlug}`,
+            lastmod: updatedAt.toISOString(),
+          });
+        }
+      }
+    }
+
+    for (const post of publishedListPosts) {
+      for (const tag of post.tags || []) allTags.add(tag);
+      for (const category of post.categories || []) allCategories.add(category);
+
+      const createdAt = resolvePostCreatedAt(post);
+      const updatedAt = post.updatedAt;
+
+      const year = createdAt.getFullYear();
+      const month = String(createdAt.getMonth() + 1).padStart(2, '0');
+      const day = String(createdAt.getDate()).padStart(2, '0');
+      const ymKey = `${year}/${month}`;
+      const ymdKey = `${year}/${month}/${day}`;
+
+      if (!yearMonths.has(ymKey) || updatedAt > yearMonths.get(ymKey)!) {
+        yearMonths.set(ymKey, updatedAt);
+      }
+      if (!years.has(year) || updatedAt > years.get(year)!) {
+        years.set(year, updatedAt);
+      }
+      if (!yearMonthDays.has(ymdKey) || updatedAt > yearMonthDays.get(ymdKey)!) {
+        yearMonthDays.set(ymdKey, updatedAt);
+      }
+    }
+
+    const latestPostUpdatedAt = publishedListPosts[0]?.updatedAt.toISOString() || now;
+
+    const urls: string[] = [];
+    urls.push(buildSitemapUrl(`${options.baseUrl}/`, latestPostUpdatedAt, 'daily', '1.0'));
+    appendPaginatedSitemapUrls(urls, options.baseUrl, '', publishedListPosts.length, maxPostsPerPage, latestPostUpdatedAt, 'daily', '0.9');
+    for (const post of postUrls) {
+      urls.push(buildSitemapUrl(post.loc, post.lastmod, 'monthly', '0.8'));
+    }
+    for (const page of pageUrls) {
+      urls.push(buildSitemapUrl(page.loc, page.lastmod, 'weekly', '0.7'));
+    }
+
+    for (const [year, lastmod] of Array.from(years.entries()).sort((a, b) => b[0] - a[0])) {
+      urls.push(buildSitemapUrl(`${options.baseUrl}/${year}`, lastmod.toISOString(), 'monthly', '0.5'));
+
+      const yearCount = publishedListPosts.filter((post) => resolvePostCreatedAt(post).getFullYear() === year).length;
+      appendPaginatedSitemapUrls(urls, options.baseUrl, `/${year}`, yearCount, maxPostsPerPage, lastmod.toISOString(), 'monthly', '0.4');
+    }
+    for (const [ym, lastmod] of Array.from(yearMonths.entries()).sort().reverse()) {
+      urls.push(buildSitemapUrl(`${options.baseUrl}/${ym}`, lastmod.toISOString(), 'monthly', '0.5'));
+
+      const [yearStr, monthStr] = ym.split('/');
+      const year = Number(yearStr);
+      const month = Number(monthStr);
+      const monthCount = publishedListPosts.filter((post) => {
+        const d = resolvePostCreatedAt(post);
+        return d.getFullYear() === year && (d.getMonth() + 1) === month;
+      }).length;
+      appendPaginatedSitemapUrls(urls, options.baseUrl, `/${ym}`, monthCount, maxPostsPerPage, lastmod.toISOString(), 'monthly', '0.4');
+    }
+    for (const [ymd, lastmod] of Array.from(yearMonthDays.entries()).sort().reverse()) {
+      urls.push(buildSitemapUrl(`${options.baseUrl}/${ymd}`, lastmod.toISOString(), 'monthly', '0.4'));
+
+      const [yearStr, monthStr, dayStr] = ymd.split('/');
+      const year = Number(yearStr);
+      const month = Number(monthStr);
+      const day = Number(dayStr);
+      const dayCount = publishedListPosts.filter((post) => {
+        const d = resolvePostCreatedAt(post);
+        return d.getFullYear() === year && (d.getMonth() + 1) === month && d.getDate() === day;
+      }).length;
+      appendPaginatedSitemapUrls(urls, options.baseUrl, `/${ymd}`, dayCount, maxPostsPerPage, lastmod.toISOString(), 'monthly', '0.3');
+    }
+
+    for (const category of Array.from(allCategories).sort()) {
+      urls.push(buildSitemapUrl(`${options.baseUrl}/category/${encodeURIComponent(category)}`, latestPostUpdatedAt, 'weekly', '0.6'));
+
+      const categoryCount = publishedListPosts.filter((post) => (post.categories || []).includes(category)).length;
+      appendPaginatedSitemapUrls(urls, options.baseUrl, `/category/${encodeURIComponent(category)}`, categoryCount, maxPostsPerPage, latestPostUpdatedAt, 'weekly', '0.5');
+    }
+
+    for (const tag of Array.from(allTags).sort()) {
+      urls.push(buildSitemapUrl(`${options.baseUrl}/tag/${encodeURIComponent(tag)}`, latestPostUpdatedAt, 'weekly', '0.6'));
+
+      const tagCount = publishedListPosts.filter((post) => (post.tags || []).includes(tag)).length;
+      appendPaginatedSitemapUrls(urls, options.baseUrl, `/tag/${encodeURIComponent(tag)}`, tagCount, maxPostsPerPage, latestPostUpdatedAt, 'weekly', '0.5');
+    }
+
+    const sitemapXml = [
+      '<?xml version="1.0" encoding="UTF-8"?>',
+      '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">',
+      ...urls,
+      '</urlset>',
+      '',
+    ].join('\n');
+
+    const htmlDir = path.join(options.dataDir, 'html');
+    await fs.mkdir(htmlDir, { recursive: true });
+    const sitemapPath = path.join(htmlDir, 'sitemap.xml');
+    const sitemapChanged = await writeFileIfHashChanged(options.projectId, sitemapPath, 'sitemap.xml', sitemapXml);
+
+    onProgress(50, 'Comparing sitemap to html pages...');
+
+    const expectedPathSet = new Set(
+      extractSitemapLocs(sitemapXml)
+        .map((loc) => sitemapLocToProjectPath(loc, options.baseUrl))
+        .map((value) => normalizeUrlPath(value)),
+    );
+
+    const existingHtmlPathSet = new Set<string>();
+    const collectIndexPaths = async (dir: string, relativePrefix = ''): Promise<void> => {
+      let entries: Array<{ name: string; isDirectory: () => boolean; isFile: () => boolean }>;
+      try {
+        entries = await fs.readdir(dir, { withFileTypes: true, encoding: 'utf8' });
+      } catch {
+        return;
+      }
+
+      for (const entry of entries) {
+        const nextRelative = relativePrefix ? `${relativePrefix}/${entry.name}` : entry.name;
+        const nextPath = path.join(dir, entry.name);
+
+        if (entry.isDirectory()) {
+          await collectIndexPaths(nextPath, nextRelative);
+          continue;
+        }
+
+        if (!entry.isFile() || entry.name !== 'index.html') {
+          continue;
+        }
+
+        const normalizedRelative = nextRelative.replace(/(^|\/)index\.html$/, '');
+        existingHtmlPathSet.add(normalizeUrlPath(normalizedRelative ? `/${normalizedRelative}` : '/'));
+      }
+    };
+
+    await collectIndexPaths(htmlDir);
+
+    const missingUrlPaths = Array.from(expectedPathSet)
+      .filter((value) => !existingHtmlPathSet.has(value))
+      .sort();
+
+    const extraUrlPaths = Array.from(existingHtmlPathSet)
+      .filter((value) => !expectedPathSet.has(value))
+      .sort();
+
+    onProgress(100, `Validation complete (${missingUrlPaths.length} missing, ${extraUrlPaths.length} extra)`);
+
+    return {
+      sitemapPath,
+      sitemapChanged,
+      missingUrlPaths,
+      extraUrlPaths,
+      expectedUrlCount: expectedPathSet.size,
+      existingHtmlUrlCount: existingHtmlPathSet.size,
+    };
+  }
+
+  async applyValidation(
+    options: BlogGenerationOptions,
+    report: SiteValidationReport,
+    onProgress: (progress: number, message?: string) => void,
+  ): Promise<SiteValidationApplyResult> {
+    onProgress(0, 'Applying validation changes...');
+
+    const missingPaths = Array.isArray(report.missingUrlPaths) ? report.missingUrlPaths : [];
+    const extraPaths = Array.isArray(report.extraUrlPaths) ? report.extraUrlPaths : [];
+
+    const sections = new Set<BlogGenerationSection>();
+    for (const missingPath of missingPaths) {
+      const normalizedPath = normalizeUrlPath(missingPath);
+
+      if (normalizedPath === '/' || /^\/page\/\d+$/.test(normalizedPath)) {
+        sections.add('core');
+        continue;
+      }
+
+      if (/^\/category\//.test(normalizedPath)) {
+        sections.add('category');
+        continue;
+      }
+
+      if (/^\/tag\//.test(normalizedPath)) {
+        sections.add('tag');
+        continue;
+      }
+
+      if (/^\/\d{4}\/\d{2}\/\d{2}\/[^/]+$/.test(normalizedPath)) {
+        sections.add('single');
+        continue;
+      }
+
+      if (/^\/\d{4}(?:\/\d{2}(?:\/\d{2})?)?(?:\/page\/\d+)?$/.test(normalizedPath)) {
+        sections.add('date');
+        continue;
+      }
+
+      if (/^\/[^/]+$/.test(normalizedPath)) {
+        sections.add('core');
+        continue;
+      }
+
+      sections.clear();
+      sections.add('core');
+      sections.add('single');
+      sections.add('category');
+      sections.add('tag');
+      sections.add('date');
+      break;
+    }
+
+    let renderedUrlCount = 0;
+
+    if (sections.size > 0) {
+      onProgress(20, 'Rendering missing URLs...');
+      const generationResult = await this.generate({
+        ...options,
+        maxPostsPerPage: options.maxPostsPerPage,
+        sections: Array.from(sections),
+      }, (progress, message) => {
+        onProgress(Math.min(70, 20 + Math.floor(progress * 0.5)), message);
+      });
+      renderedUrlCount = generationResult.pagesGenerated;
+    }
+
+    onProgress(75, 'Deleting extra URLs...');
+
+    const htmlDir = path.join(options.dataDir, 'html');
+    let deletedUrlCount = 0;
+    let removedEmptyDirCount = 0;
+
+    const pruneEmptyParents = async (startDir: string): Promise<void> => {
+      let currentDir = startDir;
+
+      while (path.resolve(currentDir) !== path.resolve(htmlDir)) {
+        let entries: string[];
+        try {
+          entries = await fs.readdir(currentDir);
+        } catch {
+          break;
+        }
+
+        if (entries.length > 0) {
+          break;
+        }
+
+        await fs.rm(currentDir, { recursive: true, force: true });
+        removedEmptyDirCount += 1;
+        currentDir = path.dirname(currentDir);
+      }
+    };
+
+    for (const urlPath of extraPaths) {
+      const filePath = urlPathToHtmlIndexPath(htmlDir, urlPath);
+      try {
+        await fs.unlink(filePath);
+        deletedUrlCount += 1;
+        await pruneEmptyParents(path.dirname(filePath));
+      } catch {
+        // ignore missing files and continue
+      }
+    }
+
+    onProgress(100, `Apply complete (${renderedUrlCount} rendered, ${deletedUrlCount} deleted)`);
+
+    return {
+      renderedUrlCount,
+      deletedUrlCount,
+      removedEmptyDirCount,
+    };
+  }
+
  private async generatePageRoutes(
    projectId: string,
    posts: PostData[],
--- a/src/main/ipc/blogHandlers.ts
+++ b/src/main/ipc/blogHandlers.ts
@@ -10,19 +10,20 @@ import {
  resolvePublicBaseUrl,
  type BlogGenerationResult,
  type BlogGenerationSection,
+  type BlogGenerationOptions,
+  type SiteValidationReport,
 } from '../engine/BlogGenerationEngine';
 import { resolvePageTitle } from '../engine/PageRenderer';

 type SafeHandle = (channel: string, handler: (...args: any[]) => Promise<any>) => void;

 export function registerBlogHandlers(safeHandle: SafeHandle): void {
-  safeHandle('blog:generateSitemap', async () => {
+  const resolveBlogGenerationBaseOptions = async (): Promise<BlogGenerationOptions> => {
    const projectEngine = getProjectEngine();
    const postEngine = getPostEngine();
    const metaEngine = getMetaEngine();
    const mediaEngine = getMediaEngine();
    const postMediaEngine = getPostMediaEngine();
-    const blogGenerationEngine = getBlogGenerationEngine();

    const project = await projectEngine.getActiveProject();
    if (!project) {
@@ -51,12 +52,10 @@ export function registerBlogHandlers(safeHandle: SafeHandle): void {
      throw new Error('Project public URL is not configured');
    }

-    const taskTimestamp = Date.now();
-    const taskGroupId = `site-render-${taskTimestamp}`;
-    const taskGroupName = 'Render Site';
    const language = metadata?.mainLanguage?.trim() || 'en';
    const pageTitle = resolvePageTitle(metadata, project.name, project.description ?? undefined);
-    const baseOptions = {
+
+    return {
      projectId: project.id,
      projectName: metadata?.name?.trim() || project.name,
      projectDescription: metadata?.description,
@@ -68,6 +67,15 @@ export function registerBlogHandlers(safeHandle: SafeHandle): void {
      picoTheme: metadata?.picoTheme,
      categorySettings: (metadata as any)?.categorySettings,
    };
+  };
+
+  safeHandle('blog:generateSitemap', async () => {
+    const blogGenerationEngine = getBlogGenerationEngine();
+    const baseOptions = await resolveBlogGenerationBaseOptions();
+
+    const taskTimestamp = Date.now();
+    const taskGroupId = `site-render-${taskTimestamp}`;
+    const taskGroupName = 'Render Site';

    const runSectionTask = async (
      section: BlogGenerationSection,
@@ -133,4 +141,18 @@ export function registerBlogHandlers(safeHandle: SafeHandle): void {

    return mergeResults([coreResult, singleResult, categoryResult, tagResult, dateResult]);
  });
+
+  safeHandle('blog:validateSite', async () => {
+    const blogGenerationEngine = getBlogGenerationEngine();
+    const baseOptions = await resolveBlogGenerationBaseOptions();
+
+    return blogGenerationEngine.validateSite(baseOptions, () => {});
+  });
+
+  safeHandle('blog:applyValidation', async (_event, report: SiteValidationReport) => {
+    const blogGenerationEngine = getBlogGenerationEngine();
+    const baseOptions = await resolveBlogGenerationBaseOptions();
+
+    return blogGenerationEngine.applyValidation(baseOptions, report, () => {});
+  });
 }
--- a/src/main/preload.ts
+++ b/src/main/preload.ts
@@ -1,6 +1,7 @@
 import { contextBridge, ipcRenderer } from 'electron';
 import type { ElectronAPI } from './shared/electronApi';
 import type { GitInitProgress } from './shared/electronApi';
+import type { SiteValidationReport } from './shared/electronApi';

 // Expose protected methods that allow the renderer process to use
 // ipcRenderer without exposing the entire object
@@ -253,6 +254,8 @@ export const electronAPI: ElectronAPI = {
  // Blog operations
  blog: {
    generateSitemap: () => ipcRenderer.invoke('blog:generateSitemap'),
+    validateSite: () => ipcRenderer.invoke('blog:validateSite'),
+    applyValidation: (report: SiteValidationReport) => ipcRenderer.invoke('blog:applyValidation', report),
  },

  // AI Chat (OpenCode Zen API integration)
--- a/src/main/shared/electronApi.ts
+++ b/src/main/shared/electronApi.ts
@@ -407,6 +407,21 @@ export interface ChatTitleUpdate {
  title: string;
 }

+export interface SiteValidationReport {
+  sitemapPath: string;
+  sitemapChanged: boolean;
+  missingUrlPaths: string[];
+  extraUrlPaths: string[];
+  expectedUrlCount: number;
+  existingHtmlUrlCount: number;
+}
+
+export interface SiteValidationApplyResult {
+  renderedUrlCount: number;
+  deletedUrlCount: number;
+  removedEmptyDirCount: number;
+}
+
 export interface ElectronAPI {
  git: {
    checkAvailability: () => Promise<GitAvailability>;
@@ -611,6 +626,8 @@ export interface ElectronAPI {
      archiveCount: number;
      pagesGenerated: number;
    }>;
+    validateSite: () => Promise<SiteValidationReport>;
+    applyValidation: (report: SiteValidationReport) => Promise<SiteValidationApplyResult>;
  };
  chat: {
    // API Key Management
--- a/src/main/shared/i18n/locales/de.json
+++ b/src/main/shared/i18n/locales/de.json
@@ -36,6 +36,7 @@
  "menu.item.reindexText": "Suchtext neu indizieren",
  "menu.item.metadataDiff": "Metadaten-Diff-Werkzeug",
  "menu.item.generateSitemap": "Site rendern",
+  "menu.item.validateSite": "Website validieren",
  "menu.item.about": "Über Blogging Desktop Server",
  "menu.item.openDocumentation": "Dokumentation öffnen",
  "menu.item.viewOnGitHub": "Auf GitHub ansehen",
--- a/src/main/shared/i18n/locales/en.json
+++ b/src/main/shared/i18n/locales/en.json
@@ -36,6 +36,7 @@
  "menu.item.reindexText": "Reindex Search Text",
  "menu.item.metadataDiff": "Metadata Diff Tool",
  "menu.item.generateSitemap": "Render Site",
+  "menu.item.validateSite": "Validate Site",
  "menu.item.about": "About Blogging Desktop Server",
  "menu.item.openDocumentation": "Open Documentation",
  "menu.item.viewOnGitHub": "View on GitHub",
--- a/src/main/shared/i18n/locales/es.json
+++ b/src/main/shared/i18n/locales/es.json
@@ -36,6 +36,7 @@
  "menu.item.reindexText": "Reindex Buscar Text",
  "menu.item.metadataDiff": "Herramienta diff de metadatos",
  "menu.item.generateSitemap": "Renderizar sitio",
+  "menu.item.validateSite": "Validar sitio",
  "menu.item.about": "Acerca de Blogging Desktop Server",
  "menu.item.openDocumentation": "Abrir documentación",
  "menu.item.viewOnGitHub": "Ver en GitHub",
--- a/src/main/shared/i18n/locales/fr.json
+++ b/src/main/shared/i18n/locales/fr.json
@@ -36,6 +36,7 @@
  "menu.item.reindexText": "Reindex Recherche Text",
  "menu.item.metadataDiff": "Outil de diff des métadonnées",
  "menu.item.generateSitemap": "Rendre le site",
+  "menu.item.validateSite": "Valider le site",
  "menu.item.about": "À propos de Blogging Desktop Server",
  "menu.item.openDocumentation": "Ouvrir la documentation",
  "menu.item.viewOnGitHub": "Voir sur GitHub",
--- a/src/main/shared/i18n/locales/it.json
+++ b/src/main/shared/i18n/locales/it.json
@@ -36,6 +36,7 @@
  "menu.item.reindexText": "Reindex Ricerca Text",
  "menu.item.metadataDiff": "Strumento diff metadati",
  "menu.item.generateSitemap": "Renderizza sito",
+  "menu.item.validateSite": "Valida sito",
  "menu.item.about": "Informazioni su Blogging Desktop Server",
  "menu.item.openDocumentation": "Apri documentazione",
  "menu.item.viewOnGitHub": "Visualizza su GitHub",
--- a/src/main/shared/menuCommands.ts
+++ b/src/main/shared/menuCommands.ts
@@ -31,6 +31,7 @@ export type AppMenuAction =
  | 'reindexText'
  | 'metadataDiff'
  | 'generateSitemap'
+  | 'validateSite'
  | 'openDocumentation'
  | 'about'
  | 'viewOnGitHub'
@@ -121,6 +122,7 @@ export const APP_MENU_GROUPS: AppMenuGroupDefinition[] = [
      { label: '', action: 'blog-separator-3', separator: true },
      { label: 'menu.item.metadataDiff', action: 'metadataDiff' },
      { label: 'menu.item.generateSitemap', action: 'generateSitemap', accelerator: 'CmdOrCtrl+R' },
+      { label: 'menu.item.validateSite', action: 'validateSite', accelerator: 'CmdOrCtrl+Alt+V' },
    ],
  },
  {
@@ -152,6 +154,7 @@ export const APP_MENU_ACTION_EVENT_MAP: Partial<Record<AppMenuAction, string>> =
  reindexText: 'menu:reindexText',
  metadataDiff: 'menu:metadataDiff',
  generateSitemap: 'menu:generateSitemap',
+  validateSite: 'menu:validateSite',
  openDocumentation: 'menu:openDocumentation',
  about: 'menu:about',
 };
--- a/src/renderer/App.tsx
+++ b/src/renderer/App.tsx
@@ -304,6 +304,12 @@ const App: React.FC = () => {
      }) || (() => {})
    );

+    unsubscribers.push(
+      window.electronAPI?.on('menu:validateSite', () => {
+        openTab({ id: 'site-validation-report', type: 'site-validation', isTransient: true });
+      }) || (() => {})
+    );
+
    unsubscribers.push(
      window.electronAPI?.on('menu:previewPost', async () => {
        try {
--- a/src/renderer/components/Editor/Editor.tsx
+++ b/src/renderer/components/Editor/Editor.tsx
@@ -17,6 +17,7 @@ import { ImportAnalysisView } from '../ImportAnalysisView';
 import { MetadataDiffPanel } from '../MetadataDiffPanel';
 import { GitDiffView } from '../GitDiffView/GitDiffView';
 import { DocumentationView } from '../DocumentationView/DocumentationView';
+import { SiteValidationView } from '../SiteValidationView';
 import { AutoSaveManager, getContrastColor } from '../../utils';
 import { InsertModal } from '../InsertModal';
 import { AISuggestionsModal, AISuggestions } from '../AISuggestionsModal/AISuggestionsModal';
@@ -1735,6 +1736,7 @@ export const Editor: React.FC = () => {
  const showMetadataDiff = activeTab?.type === 'metadata-diff';
  const showGitDiff = activeTab?.type === 'git-diff';
  const showDocumentation = activeTab?.type === 'documentation';
+  const showSiteValidation = activeTab?.type === 'site-validation';

  useEffect(() => {
    const activePostId = activeTab?.type === 'post' ? activeTab.id : null;
@@ -1873,6 +1875,16 @@ export const Editor: React.FC = () => {
    );
  }

+  if (showSiteValidation) {
+    return (
+      <div className="editor">
+        <SiteValidationView />
+        {renderErrorModal()}
+        {renderConfirmDeleteModal()}
+      </div>
+    );
+  }
+
  // Show post editor if a post tab is active
  if (showPost && activeTabId) {
    return (
--- a/src/renderer/components/SiteValidationView/SiteValidationView.css
+++ b/src/renderer/components/SiteValidationView/SiteValidationView.css
@@ -0,0 +1,70 @@
+.site-validation-view {
+  display: flex;
+  flex-direction: column;
+  gap: 16px;
+  padding: 16px;
+  height: 100%;
+  overflow: auto;
+  background: var(--vscode-editor-background);
+  color: var(--vscode-editor-foreground);
+}
+
+.site-validation-summary h2 {
+  margin: 0 0 8px 0;
+  font-size: 1.1rem;
+}
+
+.site-validation-summary p {
+  margin: 0;
+  color: var(--vscode-descriptionForeground);
+}
+
+.site-validation-section h3 {
+  margin: 0 0 8px 0;
+  font-size: 1rem;
+}
+
+.site-validation-list {
+  margin: 0;
+  padding-left: 20px;
+  font-family: var(--vscode-editor-font-family);
+  font-size: 12px;
+}
+
+.site-validation-list-missing {
+  color: var(--vscode-testing-iconPassed);
+}
+
+.site-validation-list-extra {
+  color: var(--vscode-notificationsErrorIcon-foreground);
+}
+
+.site-validation-empty,
+.site-validation-status {
+  margin: 0;
+  color: var(--vscode-descriptionForeground);
+}
+
+.site-validation-actions {
+  margin-top: auto;
+  display: flex;
+  justify-content: flex-end;
+}
+
+.site-validation-apply {
+  background-color: var(--vscode-button-background);
+  color: var(--vscode-button-foreground);
+  border: none;
+  padding: 6px 12px;
+  border-radius: 4px;
+  cursor: pointer;
+}
+
+.site-validation-apply:hover:not(:disabled) {
+  background-color: var(--vscode-button-hoverBackground);
+}
+
+.site-validation-apply:disabled {
+  opacity: 0.6;
+  cursor: not-allowed;
+}
--- a/src/renderer/components/SiteValidationView/SiteValidationView.tsx
+++ b/src/renderer/components/SiteValidationView/SiteValidationView.tsx
@@ -0,0 +1,137 @@
+import React, { useEffect, useMemo, useState } from 'react';
+import { showToast } from '../Toast';
+import { useI18n } from '../../i18n';
+import './SiteValidationView.css';
+
+type SiteValidationReport = {
+  sitemapPath: string;
+  sitemapChanged: boolean;
+  missingUrlPaths: string[];
+  extraUrlPaths: string[];
+  expectedUrlCount: number;
+  existingHtmlUrlCount: number;
+};
+
+type SiteValidationApplyResult = {
+  renderedUrlCount: number;
+  deletedUrlCount: number;
+  removedEmptyDirCount: number;
+};
+
+export const SiteValidationView: React.FC = () => {
+  const { t: tr } = useI18n();
+  const [isLoading, setIsLoading] = useState(true);
+  const [isApplying, setIsApplying] = useState(false);
+  const [report, setReport] = useState<SiteValidationReport | null>(null);
+
+  const loadReport = async () => {
+    setIsLoading(true);
+    try {
+      const result = await window.electronAPI.blog.validateSite();
+      setReport(result as SiteValidationReport);
+    } catch (error) {
+      console.error('Site validation failed:', error);
+      showToast.error(tr('siteValidation.error.validate'));
+      setReport(null);
+    } finally {
+      setIsLoading(false);
+    }
+  };
+
+  useEffect(() => {
+    void loadReport();
+  }, []);
+
+  const canApply = useMemo(() => {
+    if (!report) return false;
+    return report.missingUrlPaths.length > 0 || report.extraUrlPaths.length > 0;
+  }, [report]);
+
+  const handleApply = async () => {
+    if (!report || !canApply) {
+      return;
+    }
+
+    setIsApplying(true);
+    try {
+      const result = await window.electronAPI.blog.applyValidation(report) as SiteValidationApplyResult;
+      showToast.success(tr('siteValidation.toast.applySuccess', {
+        rendered: result.renderedUrlCount,
+        deleted: result.deletedUrlCount,
+      }));
+      await loadReport();
+    } catch (error) {
+      console.error('Applying site validation failed:', error);
+      showToast.error(tr('siteValidation.error.apply'));
+    } finally {
+      setIsApplying(false);
+    }
+  };
+
+  if (isLoading) {
+    return (
+      <div className="site-validation-view">
+        <p className="site-validation-status">{tr('siteValidation.loading')}</p>
+      </div>
+    );
+  }
+
+  if (!report) {
+    return (
+      <div className="site-validation-view">
+        <p className="site-validation-status">{tr('siteValidation.error.validate')}</p>
+      </div>
+    );
+  }
+
+  return (
+    <div className="site-validation-view">
+      <div className="site-validation-summary">
+        <h2>{tr('siteValidation.title')}</h2>
+        <p>{tr('siteValidation.summary', {
+          expected: report.expectedUrlCount,
+          existing: report.existingHtmlUrlCount,
+          missing: report.missingUrlPaths.length,
+          extra: report.extraUrlPaths.length,
+        })}</p>
+      </div>
+
+      <section className="site-validation-section">
+        <h3>{tr('siteValidation.missingTitle')}</h3>
+        {report.missingUrlPaths.length === 0 ? (
+          <p className="site-validation-empty">{tr('siteValidation.noneMissing')}</p>
+        ) : (
+          <ul className="site-validation-list site-validation-list-missing">
+            {report.missingUrlPaths.map((urlPath) => (
+              <li key={`missing:${urlPath}`}>{urlPath}</li>
+            ))}
+          </ul>
+        )}
+      </section>
+
+      <section className="site-validation-section">
+        <h3>{tr('siteValidation.extraTitle')}</h3>
+        {report.extraUrlPaths.length === 0 ? (
+          <p className="site-validation-empty">{tr('siteValidation.noneExtra')}</p>
+        ) : (
+          <ul className="site-validation-list site-validation-list-extra">
+            {report.extraUrlPaths.map((urlPath) => (
+              <li key={`extra:${urlPath}`}>{urlPath}</li>
+            ))}
+          </ul>
+        )}
+      </section>
+
+      <div className="site-validation-actions">
+        <button
+          type="button"
+          className="site-validation-apply"
+          onClick={handleApply}
+          disabled={!canApply || isApplying}
+        >
+          {isApplying ? tr('siteValidation.applying') : tr('siteValidation.apply')}
+        </button>
+      </div>
+    </div>
+  );
+};
--- a/src/renderer/components/SiteValidationView/index.ts
+++ b/src/renderer/components/SiteValidationView/index.ts
@@ -0,0 +1 @@
+export { SiteValidationView } from './SiteValidationView';
--- a/src/renderer/components/TabBar/TabBar.tsx
+++ b/src/renderer/components/TabBar/TabBar.tsx
@@ -84,6 +84,10 @@ const getTabTitle = (
    return tr('docs.title');
  }

+  if (tab.type === 'site-validation') {
+    return tr('siteValidation.tabTitle');
+  }
+
  return tr('tabBar.unknown');
 };

@@ -150,6 +154,12 @@ const getTabIcon = (tab: Tab): React.ReactNode => {
          <path d="M5 4h6v1H5V4zm0 2h6v1H5V6zm0 2h6v1H5V8zm0 2h4v1H5v-1z"/>
        </svg>
      );
+    case 'site-validation':
+      return (
+        <svg width="16" height="16" viewBox="0 0 16 16" fill="currentColor">
+          <path d="M8 1.5a6.5 6.5 0 1 0 6.5 6.5A6.5 6.5 0 0 0 8 1.5zm0 1a5.5 5.5 0 0 1 4.39 8.82l-.88-.88a.5.5 0 0 0-.7.7l.8.8A5.5 5.5 0 1 1 8 2.5zm2.35 3.15L7 9 5.65 7.65a.5.5 0 1 0-.7.7l1.7 1.7a.5.5 0 0 0 .7 0l3.7-3.7a.5.5 0 1 0-.7-.7z"/>
+        </svg>
+      );
    default:
      return (
        <svg width="16" height="16" viewBox="0 0 16 16" fill="currentColor">
--- a/src/renderer/components/index.ts
+++ b/src/renderer/components/index.ts
@@ -25,3 +25,4 @@ export { ImportAnalysisView } from './ImportAnalysisView';
 export { InsertModal } from './InsertModal';
 export { WindowTitleBar } from './WindowTitleBar';
 export { DocumentationView } from './DocumentationView/DocumentationView';
+export { SiteValidationView } from './SiteValidationView';
--- a/src/renderer/i18n/locales/de.json
+++ b/src/renderer/i18n/locales/de.json
@@ -28,6 +28,19 @@
  "app.previewOpenFailed": "Ausgewählte Beitragsvorschau konnte nicht geöffnet werden",
  "app.metadataDiff": "Metadaten-Diff",
  "app.importComplete": "Import abgeschlossen: {posts} Beiträge, {media} Mediendateien",
+  "siteValidation.tabTitle": "Website-Validierung",
+  "siteValidation.title": "Website validieren",
+  "siteValidation.summary": "Erwartete URLs: {expected} · Vorhandene HTML-URLs: {existing} · Fehlend: {missing} · Überzählig: {extra}",
+  "siteValidation.loading": "Website wird validiert...",
+  "siteValidation.missingTitle": "Fehlende HTML-URLs (zum Rendern)",
+  "siteValidation.extraTitle": "Nicht referenzierte HTML-URLs (zum Löschen)",
+  "siteValidation.noneMissing": "Keine fehlenden URLs gefunden.",
+  "siteValidation.noneExtra": "Keine überzähligen URLs gefunden.",
+  "siteValidation.apply": "Anwenden",
+  "siteValidation.applying": "Wird angewendet...",
+  "siteValidation.error.validate": "Website-Validierung fehlgeschlagen",
+  "siteValidation.error.apply": "Anwenden der Validierung fehlgeschlagen",
+  "siteValidation.toast.applySuccess": "Validierung angewendet: {rendered} gerendert, {deleted} gelöscht",
  "settings.language.english": "Englisch",
  "settings.language.german": "Deutsch",
  "settings.language.french": "Französisch",
--- a/src/renderer/i18n/locales/en.json
+++ b/src/renderer/i18n/locales/en.json
@@ -28,6 +28,19 @@
  "app.previewOpenFailed": "Failed to open selected post preview",
  "app.metadataDiff": "Metadata Diff",
  "app.importComplete": "Import complete: {posts} posts, {media} media files",
+  "siteValidation.tabTitle": "Site Validation",
+  "siteValidation.title": "Validate Site",
+  "siteValidation.summary": "Expected URLs: {expected} · Existing HTML URLs: {existing} · Missing: {missing} · Extra: {extra}",
+  "siteValidation.loading": "Validating site...",
+  "siteValidation.missingTitle": "Missing HTML URLs (to render)",
+  "siteValidation.extraTitle": "Unreferenced HTML URLs (to delete)",
+  "siteValidation.noneMissing": "No missing URLs found.",
+  "siteValidation.noneExtra": "No extra URLs found.",
+  "siteValidation.apply": "Apply",
+  "siteValidation.applying": "Applying...",
+  "siteValidation.error.validate": "Site validation failed",
+  "siteValidation.error.apply": "Applying validation failed",
+  "siteValidation.toast.applySuccess": "Validation applied: {rendered} rendered, {deleted} deleted",
  "settings.language.english": "English",
  "settings.language.german": "German",
  "settings.language.french": "French",
--- a/src/renderer/i18n/locales/es.json
+++ b/src/renderer/i18n/locales/es.json
@@ -28,6 +28,19 @@
  "app.previewOpenFailed": "No se pudo abrir la vista previa de la entrada seleccionada",
  "app.metadataDiff": "Diferencia de Metadatos",
  "app.importComplete": "Importación completada: {posts} entradas, {media} archivos multimedia",
+  "siteValidation.tabTitle": "Validación del sitio",
+  "siteValidation.title": "Validar sitio",
+  "siteValidation.summary": "URLs esperadas: {expected} · URLs HTML existentes: {existing} · Faltantes: {missing} · Sobrantes: {extra}",
+  "siteValidation.loading": "Validando el sitio...",
+  "siteValidation.missingTitle": "URLs HTML faltantes (para renderizar)",
+  "siteValidation.extraTitle": "URLs HTML no referenciadas (para eliminar)",
+  "siteValidation.noneMissing": "No se encontraron URLs faltantes.",
+  "siteValidation.noneExtra": "No se encontraron URLs sobrantes.",
+  "siteValidation.apply": "Aplicar",
+  "siteValidation.applying": "Aplicando...",
+  "siteValidation.error.validate": "La validación del sitio falló",
+  "siteValidation.error.apply": "La aplicación de la validación falló",
+  "siteValidation.toast.applySuccess": "Validación aplicada: {rendered} renderizadas, {deleted} eliminadas",
  "settings.language.english": "Inglés",
  "settings.language.german": "Alemán",
  "settings.language.french": "Francés",
--- a/src/renderer/i18n/locales/fr.json
+++ b/src/renderer/i18n/locales/fr.json
@@ -28,6 +28,19 @@
  "app.previewOpenFailed": "Impossible d’ouvrir l’aperçu de l’article sélectionné",
  "app.metadataDiff": "Diff Métadonnées",
  "app.importComplete": "Import terminé : {posts} articles, {media} fichiers média",
+  "siteValidation.tabTitle": "Validation du site",
+  "siteValidation.title": "Valider le site",
+  "siteValidation.summary": "URLs attendues : {expected} · URLs HTML existantes : {existing} · Manquantes : {missing} · En trop : {extra}",
+  "siteValidation.loading": "Validation du site en cours...",
+  "siteValidation.missingTitle": "URLs HTML manquantes (à rendre)",
+  "siteValidation.extraTitle": "URLs HTML non référencées (à supprimer)",
+  "siteValidation.noneMissing": "Aucune URL manquante trouvée.",
+  "siteValidation.noneExtra": "Aucune URL en trop trouvée.",
+  "siteValidation.apply": "Appliquer",
+  "siteValidation.applying": "Application en cours...",
+  "siteValidation.error.validate": "Échec de la validation du site",
+  "siteValidation.error.apply": "Échec de l’application de la validation",
+  "siteValidation.toast.applySuccess": "Validation appliquée : {rendered} rendues, {deleted} supprimées",
  "settings.language.english": "Anglais",
  "settings.language.german": "Allemand",
  "settings.language.french": "Français",
--- a/src/renderer/i18n/locales/it.json
+++ b/src/renderer/i18n/locales/it.json
@@ -28,6 +28,19 @@
  "app.previewOpenFailed": "Impossibile aprire l’anteprima del post selezionato",
  "app.metadataDiff": "Diff Metadati",
  "app.importComplete": "Import completato: {posts} post, {media} file multimediali",
+  "siteValidation.tabTitle": "Validazione sito",
+  "siteValidation.title": "Valida sito",
+  "siteValidation.summary": "URL attesi: {expected} · URL HTML esistenti: {existing} · Mancanti: {missing} · Extra: {extra}",
+  "siteValidation.loading": "Validazione del sito in corso...",
+  "siteValidation.missingTitle": "URL HTML mancanti (da renderizzare)",
+  "siteValidation.extraTitle": "URL HTML non referenziati (da eliminare)",
+  "siteValidation.noneMissing": "Nessun URL mancante trovato.",
+  "siteValidation.noneExtra": "Nessun URL extra trovato.",
+  "siteValidation.apply": "Applica",
+  "siteValidation.applying": "Applicazione in corso...",
+  "siteValidation.error.validate": "Validazione del sito non riuscita",
+  "siteValidation.error.apply": "Applicazione della validazione non riuscita",
+  "siteValidation.toast.applySuccess": "Validazione applicata: {rendered} renderizzati, {deleted} eliminati",
  "settings.language.english": "Inglese",
  "settings.language.german": "Tedesco",
  "settings.language.french": "Francese",
--- a/src/renderer/store/appStore.ts
+++ b/src/renderer/store/appStore.ts
@@ -12,7 +12,7 @@ import type {
 const STORAGE_KEY = 'bds-app-state';

 // Tab types
-export type TabType = 'post' | 'media' | 'settings' | 'style' | 'tags' | 'chat' | 'import' | 'metadata-diff' | 'git-diff' | 'documentation';
+export type TabType = 'post' | 'media' | 'settings' | 'style' | 'tags' | 'chat' | 'import' | 'metadata-diff' | 'git-diff' | 'documentation' | 'site-validation';

 export interface Tab {
  type: TabType;
--- a/src/renderer/utils/tabPersistence.ts
+++ b/src/renderer/utils/tabPersistence.ts
@@ -4,7 +4,15 @@ const TAB_STATE_PREFIX = 'bds-tabs-';

 export const saveTabsForProject = (projectId: string, tabState: TabState): void => {
  try {
-    localStorage.setItem(`${TAB_STATE_PREFIX}${projectId}`, JSON.stringify(tabState));
+    const persistentTabs = tabState.tabs.filter((tab) => tab.isTransient !== true);
+    const persistedState: TabState = {
+      tabs: persistentTabs,
+      activeTabId: persistentTabs.some((tab) => tab.id === tabState.activeTabId)
+        ? tabState.activeTabId
+        : (persistentTabs[0]?.id ?? null),
+    };
+
+    localStorage.setItem(`${TAB_STATE_PREFIX}${projectId}`, JSON.stringify(persistedState));
  } catch (error) {
    console.error('Failed to save tab state:', error);
  }
--- a/tests/engine/BlogGenerationEngine.test.ts
+++ b/tests/engine/BlogGenerationEngine.test.ts
@@ -1,5 +1,5 @@
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
-import { mkdtemp, readFile, rm, readdir, stat } from 'node:fs/promises';
+import { mkdtemp, readFile, rm, readdir, stat, mkdir, writeFile } from 'node:fs/promises';
 import path from 'node:path';
 import { tmpdir } from 'node:os';
 import type { PostData } from '../../src/main/engine/PostEngine';
@@ -442,6 +442,171 @@ describe('BlogGenerationEngine', () => {
    expect(result.pagesGenerated).toBe(7);
  });

+  it('validates sitemap against html folder without rendering missing pages', async () => {
+    const posts = [
+      makePost({
+        id: '1',
+        slug: 'validation-main-post',
+        title: 'Validation Main Post',
+        categories: ['news'],
+        tags: ['validation-tag'],
+        createdAt: new Date('2025-01-15T10:00:00Z'),
+      }),
+      makePost({
+        id: '2',
+        slug: 'validation-page',
+        title: 'Validation Page',
+        categories: ['page'],
+        tags: [],
+        createdAt: new Date('2025-01-16T10:00:00Z'),
+      }),
+    ];
+    setupPosts(posts);
+
+    await mkdir(path.join(tempDir, 'html', 'stale'), { recursive: true });
+    await writeFile(path.join(tempDir, 'html', 'stale', 'index.html'), '<html>stale</html>', 'utf-8');
+
+    const { BlogGenerationEngine } = await import('../../src/main/engine/BlogGenerationEngine');
+    const engine = new BlogGenerationEngine();
+
+    const report = await engine.validateSite({
+      projectId: 'test',
+      projectName: 'Test Blog',
+      dataDir: tempDir,
+      baseUrl: 'https://example.com',
+    }, vi.fn());
+
+    expect(report.missingUrlPaths).toContain('/2025/01/15/validation-main-post');
+    expect(report.missingUrlPaths).toContain('/category/news');
+    expect(report.missingUrlPaths).toContain('/tag/validation-tag');
+    expect(report.missingUrlPaths).toContain('/validation-page');
+    expect(report.extraUrlPaths).toContain('/stale');
+
+    expect(await fileExists(path.join(tempDir, 'html', '2025', '01', '15', 'validation-main-post', 'index.html'))).toBe(false);
+    expect(await fileExists(path.join(tempDir, 'html', 'sitemap.xml'))).toBe(true);
+  });
+
+  it('applies validation by rendering missing pages and deleting extra pages with folder pruning', async () => {
+    const posts = [
+      makePost({
+        id: '1',
+        slug: 'apply-post',
+        title: 'Apply Post',
+        categories: ['news'],
+        tags: ['apply-tag'],
+        createdAt: new Date('2025-01-15T10:00:00Z'),
+      }),
+    ];
+    setupPosts(posts);
+
+    await mkdir(path.join(tempDir, 'html', 'obsolete', 'deep'), { recursive: true });
+    await writeFile(path.join(tempDir, 'html', 'obsolete', 'deep', 'index.html'), '<html>obsolete</html>', 'utf-8');
+
+    const { BlogGenerationEngine } = await import('../../src/main/engine/BlogGenerationEngine');
+    const engine = new BlogGenerationEngine();
+
+    const report = await engine.validateSite({
+      projectId: 'test',
+      projectName: 'Test Blog',
+      dataDir: tempDir,
+      baseUrl: 'https://example.com',
+    }, vi.fn());
+
+    const applyResult = await engine.applyValidation({
+      projectId: 'test',
+      projectName: 'Test Blog',
+      dataDir: tempDir,
+      baseUrl: 'https://example.com',
+    }, report, vi.fn());
+
+    expect(applyResult.deletedUrlCount).toBeGreaterThan(0);
+    expect(applyResult.renderedUrlCount).toBeGreaterThan(0);
+
+    expect(await fileExists(path.join(tempDir, 'html', 'obsolete', 'deep', 'index.html'))).toBe(false);
+    expect(await fileExists(path.join(tempDir, 'html', 'obsolete', 'deep'))).toBe(false);
+    expect(await fileExists(path.join(tempDir, 'html', 'obsolete'))).toBe(false);
+    expect(await fileExists(path.join(tempDir, 'html'))).toBe(true);
+    expect(await fileExists(path.join(tempDir, 'html', '2025', '01', '15', 'apply-post', 'index.html'))).toBe(true);
+  });
+
+  it('does not report valid pagination routes as extra html content', async () => {
+    const posts = [
+      makePost({ id: '1', slug: 'p1', categories: ['news'], tags: ['tag-news'], createdAt: new Date('2025-01-15T10:00:00Z') }),
+      makePost({ id: '2', slug: 'p2', categories: ['news'], tags: ['tag-news'], createdAt: new Date('2025-01-14T10:00:00Z') }),
+      makePost({ id: '3', slug: 'p3', categories: ['news'], tags: ['tag-news'], createdAt: new Date('2025-01-13T10:00:00Z') }),
+    ];
+
+    setupPosts(posts);
+
+    const { BlogGenerationEngine } = await import('../../src/main/engine/BlogGenerationEngine');
+    const engine = new BlogGenerationEngine();
+
+    await engine.generate({
+      projectId: 'test',
+      projectName: 'Test Blog',
+      dataDir: tempDir,
+      baseUrl: 'https://example.com',
+      maxPostsPerPage: 2,
+    }, vi.fn());
+
+    const report = await engine.validateSite({
+      projectId: 'test',
+      projectName: 'Test Blog',
+      dataDir: tempDir,
+      baseUrl: 'https://example.com',
+      maxPostsPerPage: 2,
+    }, vi.fn());
+
+    expect(report.extraUrlPaths).not.toContain('/page/2');
+    expect(report.extraUrlPaths).not.toContain('/category/news/page/2');
+    expect(report.extraUrlPaths).not.toContain('/tag/tag-news/page/2');
+  });
+
+  it('emits sitemap urls with trailing slash canonical form', async () => {
+    const posts = [
+      makePost({
+        id: '1',
+        slug: 'canonical-post',
+        categories: ['news'],
+        tags: ['canonical-tag'],
+        createdAt: new Date('2025-01-15T10:00:00Z'),
+      }),
+      makePost({
+        id: '2',
+        slug: 'canonical-post-2',
+        categories: ['news'],
+        tags: ['canonical-tag'],
+        createdAt: new Date('2025-01-14T10:00:00Z'),
+      }),
+      makePost({
+        id: '3',
+        slug: 'canonical-post-3',
+        categories: ['news'],
+        tags: ['canonical-tag'],
+        createdAt: new Date('2025-01-13T10:00:00Z'),
+      }),
+      makePost({
+        id: '4',
+        slug: 'canonical-page',
+        categories: ['page'],
+        tags: [],
+        createdAt: new Date('2025-01-12T10:00:00Z'),
+      }),
+    ];
+
+    await generate(posts, { maxPostsPerPage: 2 });
+
+    const sitemap = await readFile(path.join(tempDir, 'html', 'sitemap.xml'), 'utf-8');
+
+    expect(sitemap).toContain('<loc>https://example.com/</loc>');
+    expect(sitemap).toContain('<loc>https://example.com/2025/01/15/canonical-post/</loc>');
+    expect(sitemap).toContain('<loc>https://example.com/category/news/</loc>');
+    expect(sitemap).toContain('<loc>https://example.com/category/news/page/2/</loc>');
+    expect(sitemap).toContain('<loc>https://example.com/tag/canonical-tag/</loc>');
+    expect(sitemap).toContain('<loc>https://example.com/canonical-page/</loc>');
+    expect(sitemap).toContain('<loc>https://example.com/page/2/</loc>');
+  });
+
  it('generates HTML that references local assets not CDN', async () => {
    const posts = [makePost({ id: '1', slug: 'test' })];
    await generate(posts);
--- a/tests/ipc/handlers.test.ts
+++ b/tests/ipc/handlers.test.ts
@@ -2246,6 +2246,64 @@ describe('IPC Handlers', () => {
        expect(sitemapXml).not.toContain('http://127.0.0.1:4123/2024/03/25/public-url-test-post');
      });
    });
+
+    describe('blog:validateSite', () => {
+      it('should generate sitemap-only validation report against html folder', async () => {
+        const mockProject = createMockProject({
+          id: 'test-project',
+          dataPath: '/mock/data',
+        });
+        mockProjectEngine.getActiveProject.mockResolvedValue(mockProject);
+        mockProjectEngine.getDataDir.mockReturnValue('/mock/data/dir');
+        mockMetaEngine.getProjectMetadata.mockResolvedValue({
+          name: 'Test Project',
+          publicUrl: 'https://blog.example.com',
+        });
+
+        mockPostEngine.getPostsFiltered.mockImplementation(async (filter: { status?: string }) => {
+          if (filter.status === 'published') {
+            return [
+              {
+                id: 'post-1',
+                projectId: 'test-project',
+                title: 'Test Post',
+                slug: 'test-post',
+                excerpt: '',
+                content: '# Test',
+                status: 'published',
+                createdAt: new Date('2024-01-15T10:00:00Z'),
+                updatedAt: new Date('2024-01-20T15:00:00Z'),
+                publishedAt: new Date('2024-01-15T10:00:00Z'),
+                tags: ['tag1'],
+                categories: ['category1'],
+              },
+            ];
+          }
+          if (filter.status === 'draft') {
+            return [];
+          }
+          return [];
+        });
+        mockPostEngine.getPublishedVersion.mockResolvedValue(null);
+
+        const { writeFile, mkdir, readdir } = await import('fs/promises');
+        vi.mocked(mkdir).mockResolvedValue(undefined);
+        vi.mocked(writeFile).mockResolvedValue(undefined);
+        vi.mocked(readdir).mockResolvedValue([] as never);
+
+        const result = await invokeHandler('blog:validateSite');
+
+        expect(result).toEqual(expect.objectContaining({
+          missingUrlPaths: expect.any(Array),
+          extraUrlPaths: expect.any(Array),
+        }));
+        expect(writeFile).toHaveBeenCalledWith(
+          expect.stringContaining('sitemap.xml'),
+          expect.stringContaining('<?xml version="1.0" encoding="UTF-8"?>'),
+          'utf-8',
+        );
+      });
+    });
  });

  // ============ Error Handling ============
--- a/tests/renderer/menuCommands.test.ts
+++ b/tests/renderer/menuCommands.test.ts
@@ -40,11 +40,15 @@ describe('Help menu documentation entry', () => {
    expect(viewGroup?.items.some((item) => item.action === 'toggleFullScreen')).toBe(true);
  });

-  it('assigns Command/Ctrl+R shortcut for generateSitemap menu item', () => {
+  it('includes Validate Site action in Blog menu with a V shortcut', () => {
    const blogGroup = APP_MENU_GROUPS.find((group) => group.label === 'Blog');
-    const generateSiteItem = blogGroup?.items.find((item) => item.action === 'generateSitemap');
+    const validateSiteItem = blogGroup?.items.find((item) => item.action === 'validateSite');

-    expect(generateSiteItem).toBeDefined();
-    expect(generateSiteItem?.accelerator).toBe('CmdOrCtrl+R');
+    expect(validateSiteItem).toBeDefined();
+    expect(validateSiteItem?.accelerator).toContain('V');
+  });
+
+  it('maps Validate Site to a renderer menu event', () => {
+    expect(APP_MENU_ACTION_EVENT_MAP.validateSite).toBe('menu:validateSite');
  });
 });
--- a/tests/renderer/utils/tabPersistence.test.ts
+++ b/tests/renderer/utils/tabPersistence.test.ts
@@ -47,4 +47,23 @@ describe('tabPersistence', () => {

    expect(() => saveTabsForProject(projectId, sampleTabState)).not.toThrow();
  });
+
+  it('does not persist transient tabs', () => {
+    const tabStateWithTransient = {
+      tabs: [
+        { id: 'documentation', type: 'documentation', isTransient: false },
+        { id: 'site-validation-report', type: 'site-validation', isTransient: true },
+      ],
+      activeTabId: 'site-validation-report',
+    } as unknown as TabState;
+
+    saveTabsForProject(projectId, tabStateWithTransient);
+
+    const loaded = loadTabsForProject(projectId);
+
+    expect(loaded?.tabs).toEqual([
+      { id: 'documentation', type: 'documentation', isTransient: false },
+    ]);
+    expect(loaded?.activeTabId).toBe('documentation');
+  });
 });
				`@@ -0,0 +1 @@`
				`export { SiteValidationView } from './SiteValidationView';`