diff --git a/package.json b/package.json
index 7c04964..0760313 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,7 @@
   "description": "DocForge static site generator",
   "scripts": {
     "dev": "eleventy --serve",
-    "build": "eleventy"
+    "build": "node src/generator/index.js"
   },
   "dependencies": {
     "@11ty/eleventy": "^2.0.1",
diff --git a/src/generator/index.js b/src/generator/index.js
new file mode 100644
index 0000000..1d3cc71
--- /dev/null
+++ b/src/generator/index.js
@@ -0,0 +1,116 @@
+// Generator entry point for DocForge
+const fs = require('fs');
+const path = require('path');
+const matter = require('gray-matter');
+const Eleventy = require('@11ty/eleventy');
+
+async function readDirRecursive(dir) {
+  const entries = await fs.promises.readdir(dir, { withFileTypes: true });
+  const files = [];
+  for (const entry of entries) {
+    const res = path.resolve(dir, entry.name);
+    if (entry.isDirectory()) {
+      files.push(...await readDirRecursive(res));
+    } else {
+      files.push(res);
+    }
+  }
+  return files;
+}
+
+function buildNav(pages) {
+  const tree = {};
+  for (const page of pages) {
+    const rel = page.file.replace(/\\/g, '/');
+    const parts = rel.split('/');
+    let node = tree;
+    for (let i = 0; i < parts.length; i++) {
+      const part = parts[i];
+      if (!node.children) node.children = [];
+      let child = node.children.find(c => c.name === part);
+      if (!child) {
+        child = { name: part, children: [] };
+        node.children.push(child);
+      }
+      node = child;
+      if (i === parts.length - 1) {
+        node.page = page.data;
+        node.path = `/${rel.replace(/\.md$/, '.html')}`;
+      }
+    }
+    node.order = page.data.order || 0;
+  }
+
+  function sort(node) {
+    if (!node.children) return;
+    node.children.sort((a, b) => (a.order || 0) - (b.order || 0));
+    node.children.forEach(sort);
+  }
+  sort(tree);
+  return tree.children || [];
+}
+
+async function generate({ contentDir = 'content', outputDir = '_site' } = {}) {
+  if (!fs.existsSync(contentDir)) {
+    console.error(`Content directory not found: ${contentDir}`);
+    return;
+  }
+
+  const files = await readDirRecursive(contentDir);
+  const pages = [];
+  const assets = [];
+
+  for (const file of files) {
+    const rel = path.relative(contentDir, file);
+    if (file.endsWith('.md')) {
+      const srcStat = await fs.promises.stat(file);
+      const outPath = path.join(outputDir, rel.replace(/\.md$/, '.html'));
+      if (fs.existsSync(outPath)) {
+        const outStat = await fs.promises.stat(outPath);
+        if (srcStat.mtimeMs <= outStat.mtimeMs) {
+          continue; // skip unchanged
+        }
+      }
+      const raw = await fs.promises.readFile(file, 'utf8');
+      const parsed = matter(raw);
+      pages.push({ file: rel, data: { ...parsed.data, title: parsed.data.title || path.basename(rel, '.md') } });
+    } else {
+      assets.push(rel);
+    }
+  }
+
+  const nav = buildNav(pages);
+  await fs.promises.mkdir(outputDir, { recursive: true });
+  await fs.promises.writeFile(path.join(outputDir, 'navigation.json'), JSON.stringify(nav, null, 2));
+
+  const elev = new Eleventy(contentDir, outputDir);
+  elev.setConfig({
+    dir: { input: contentDir, output: outputDir },
+    templateFormats: ['md', 'njk'],
+    markdownTemplateEngine: 'njk',
+    htmlTemplateEngine: 'njk',
+    dataTemplateEngine: 'njk'
+  });
+  elev.configFunction = function(eleventyConfig) {
+    eleventyConfig.addGlobalData('navigation', nav);
+  };
+  await elev.write();
+
+  for (const asset of assets) {
+    const srcPath = path.join(contentDir, asset);
+    const destPath = path.join(outputDir, asset);
+    await fs.promises.mkdir(path.dirname(destPath), { recursive: true });
+    try {
+      const sharp = require('sharp');
+      if (/(png|jpg|jpeg)/i.test(path.extname(asset))) {
+        await sharp(srcPath).toFile(destPath);
+        continue;
+      }
+    } catch (e) {
+      // sharp not installed, fallback
+    }
+    await fs.promises.copyFile(srcPath, destPath);
+  }
+}
+
+module.exports = { generate };