diff --git a/.github/workflows/smoke.yml b/.github/workflows/smoke.yml
index 296f3c6..9521fa5 100644
--- a/.github/workflows/smoke.yml
+++ b/.github/workflows/smoke.yml
@@ -163,6 +163,16 @@ jobs:
             echo "FAIL  TigerSEO head tags missing"; fail=1
           fi
 
+          # JSON-LD site-identity graph — the page must carry a ld+json block with the Organization node
+          # (the schema Google reads for brand sitelinks). Also assert it stayed valid JSON.
+          if grep -q 'application/ld+json' page.html && grep -q '"Organization"' page.html; then
+            echo "PASS  TigerSEO JSON-LD (Organization graph) rendered"
+            php -r '$h=file_get_contents("page.html"); if(preg_match("#<script type=\"application/ld\+json\">(.*?)</script>#s",$h,$m)){exit(json_decode($m[1])!==null?0:1);} exit(1);' \
+              && echo "PASS  JSON-LD is valid JSON" || { echo "FAIL  JSON-LD did not parse"; fail=1; }
+          else
+            echo "FAIL  TigerSEO JSON-LD missing"; fail=1
+          fi
+
           # sitemap.xml + robots.txt are ROUTES (not files). The sitemap must list the seeded page (the
           # pages provider), and robots must point crawlers at the sitemap.
           check "sitemap.xml route"    200 "http://127.0.0.1:8000/sitemap.xml"
diff --git a/CHANGELOG.md b/CHANGELOG.md
index f5e99f5..f88b875 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,18 @@ All notable changes to **Tiger Core** (`webtigers/tiger-core`). Format follows
 
 ## [Unreleased]
 
+### Added
+- **TigerSEO — JSON-LD structured data (rich results / sitelinks layer).** Where the head meta/OG tags
+  describe one *page*, this describes the *site as an entity*: a single `<script type="application/ld+json">`
+  `@graph` carrying **Organization** (brand: name, logo via the media row with real dimensions, social
+  `sameAs`), **WebSite** (publisher → Organization; an optional **SearchAction**/sitelinks-searchbox when
+  `tiger.seo.schema.search_url` is set), and **SiteNavigationElement** (the primary menu, so Google can map
+  site structure → sitelinks). Emitted once per request by `Seo_Service_Schema` into a `tigerJsonLd` head
+  placeholder the public layout renders — no core edit, gone when the module is absent. Config-driven
+  (`tiger.site.name`/`.logo`, `tiger.seo.social.*`, `tiger.seo.schema.*`) and fail-soft: a missing name,
+  logo, or menu just omits that node. `<`/`>` are hex-escaped (`JSON_HEX_TAG`) so a value can never break
+  out of the `<script>`. (BreadcrumbList + Article are the next slice.)
+
 ## [0.15.0-beta] — 2026-07-17
 
 ### Added
diff --git a/modules/seo/plugins/Head.php b/modules/seo/plugins/Head.php
index 458d8de..347dc0f 100644
--- a/modules/seo/plugins/Head.php
+++ b/modules/seo/plugins/Head.php
@@ -16,9 +16,16 @@ class Seo_Plugin_Head extends Zend_Controller_Plugin_Abstract
      */
     public function preDispatch(Zend_Controller_Request_Abstract $request)
     {
+        // Site-identity structured data (Organization + WebSite + SiteNavigationElement) — the same for
+        // every page, emitted once (the service latches). Independent of whether this is a CMS page, so
+        // it rides every public render; non-public layouts simply don't output the placeholder.
+        if (class_exists('Seo_Service_Schema')) {
+            Seo_Service_Schema::emitSite($request);
+        }
+
         $pageId = (string) $request->getParam('cms_page_id', '');
         if ($pageId === '') {
-            return;   // not a CMS page dispatch
+            return;   // not a CMS page dispatch — no per-page head to build
         }
         try {
             $page = (new Tiger_Model_Page())->findById($pageId);
diff --git a/modules/seo/services/Schema.php b/modules/seo/services/Schema.php
new file mode 100644
index 0000000..1a2065f
--- /dev/null
+++ b/modules/seo/services/Schema.php
@@ -0,0 +1,261 @@
+<?php
+// SPDX-License-Identifier: BSD-3-Clause
+// Copyright (c) 2026 WebTigers. Tiger™ and WebTigers™ are trademarks of WebTigers.
+/**
+ * Seo_Service_Schema — contributes JSON-LD structured data (schema.org) to the head. Where the head
+ * meta/OG tags (Seo_Service_Head) describe ONE page, this describes the SITE as an entity: the
+ * Organization (brand), the WebSite, and the primary SiteNavigationElement — the graph Google reads to
+ * build the brand knowledge panel and **sitelinks**. Emitted once per request as a single
+ * `<script type="application/ld+json">` block holding an `@graph` of cross-referenced nodes.
+ *
+ * Like Seo_Service_Head it appends into a process-wide Zend_View placeholder (`tigerJsonLd`) which the
+ * public layout renders — so no core edit, and it degrades to nothing when the module is absent. It is
+ * NOT a Tiger_Service_Service, so it is unreachable over /api (the gateway's type guard blocks it); the
+ * plugin calls it in-process. Everything is config-driven and fail-soft: a missing site name, logo, or
+ * menu simply omits that part rather than breaking the graph or the page.
+ *
+ * @api
+ * @see Seo_Service_Head
+ */
+class Seo_Service_Schema
+{
+    /** Emit-once latch: the site graph is identical for every page, so it renders a single time per request. */
+    private static $_emitted = false;
+
+    /**
+     * Emit the site-identity graph (Organization + WebSite + SiteNavigationElement) into the head, once.
+     *
+     * @param  Zend_Controller_Request_Abstract|null $request the current request (for the absolute base URL)
+     * @return void
+     */
+    public static function emitSite(?Zend_Controller_Request_Abstract $request = null)
+    {
+        if (self::$_emitted) {
+            return;
+        }
+        self::$_emitted = true;
+
+        try {
+            $base = self::_base($request);
+            if ($base === '') {
+                return;   // no absolute base to anchor @id/url on — skip rather than emit relative nodes
+            }
+            $nodes = array_values(array_filter([
+                self::_organization($base, $request),
+                self::_website($base),
+                self::_siteNavigation($base),
+            ]));
+            if ($nodes) {
+                self::_emit($nodes);
+            }
+        } catch (Throwable $e) {
+            // fail-open — structured data must never take down a page render
+        }
+    }
+
+    /** The brand entity: name, url, logo (real dimensions via the media row), and social `sameAs` links. */
+    private static function _organization($base, $request)
+    {
+        $node = [
+            '@type' => 'Organization',
+            '@id'   => $base . '/#organization',
+            'name'  => self::_siteName(),
+            'url'   => $base . '/',
+        ];
+
+        // Logo: the Site Identity logo (tiger.site.logo), else the SEO share image (tiger.seo.og_image).
+        $logo = self::_image(self::_config('site.logo', self::_config('seo.og_image', '')), $request);
+        if ($logo) {
+            $node['logo'] = array_filter([
+                '@type'  => 'ImageObject',
+                '@id'    => $base . '/#logo',
+                'url'    => $logo['url'],
+                'width'  => $logo['width'],
+                'height' => $logo['height'],
+            ], static function ($v) { return $v !== null && $v !== ''; });
+        }
+
+        $sameAs = self::_sameAs();
+        if ($sameAs) {
+            $node['sameAs'] = $sameAs;
+        }
+        return $node;
+    }
+
+    /** The website node — publisher points at the Organization; an optional SearchAction = a sitelinks searchbox. */
+    private static function _website($base)
+    {
+        $node = [
+            '@type'     => 'WebSite',
+            '@id'       => $base . '/#website',
+            'url'       => $base . '/',
+            'name'      => self::_siteName(),
+            'publisher' => ['@id' => $base . '/#organization'],
+        ];
+
+        // Sitelinks searchbox — only when the operator has a public search URL template configured.
+        // e.g. tiger.seo.schema.search_url = "/search?q={search_term_string}"
+        $search = trim((string) self::_config('seo.schema.search_url', ''));
+        if ($search !== '') {
+            $target = preg_match('#^https?://#i', $search) ? $search : $base . '/' . ltrim($search, '/');
+            $node['potentialAction'] = [
+                '@type'       => 'SearchAction',
+                'target'      => ['@type' => 'EntryPoint', 'urlTemplate' => $target],
+                'query-input' => 'required name=search_term_string',
+            ];
+        }
+        return $node;
+    }
+
+    /** The primary nav as a SiteNavigationElement — helps Google map site structure (→ sitelinks). */
+    private static function _siteNavigation($base)
+    {
+        if (!class_exists('Tiger_Menu')) {
+            return null;
+        }
+        $key = trim((string) self::_config('seo.schema.nav_menu', 'primary'));
+        if ($key === '') {
+            $key = 'primary';
+        }
+        try {
+            $tree = Tiger_Menu::getData($key);
+        } catch (Throwable $e) {
+            return null;
+        }
+        if (!is_array($tree) || !$tree) {
+            return null;
+        }
+
+        $names = [];
+        $urls  = [];
+        foreach ($tree as $item) {                      // top-level items only — that's what nav sitelinks use
+            $label = trim((string) ($item['label'] ?? ''));
+            $href  = (string) ($item['href'] ?? '');
+            if ($label === '' || $href === '' || $href === '#') {
+                continue;                               // skip headings + dead placeholders
+            }
+            $names[] = $label;
+            $urls[]  = preg_match('#^https?://#i', $href) ? $href : $base . '/' . ltrim($href, '/');
+        }
+        if (!$names) {
+            return null;
+        }
+        return [
+            '@type' => 'SiteNavigationElement',
+            '@id'   => $base . '/#sitenav',
+            'name'  => $names,
+            'url'   => $urls,
+        ];
+    }
+
+    // =====================================================================================
+    //  Helpers
+    // =====================================================================================
+
+    /** Serialize the nodes as one `@graph` and append the ld+json <script> to the head placeholder. */
+    private static function _emit(array $nodes)
+    {
+        $graph = ['@context' => 'https://schema.org', '@graph' => array_values($nodes)];
+        // JSON_HEX_TAG encodes every < and > as </>, so a value can never break out of the
+        // <script> element (parsers decode them back) — the safe way to inline JSON-LD.
+        $json = json_encode($graph, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE | JSON_HEX_TAG);
+        if ($json === false) {
+            return;
+        }
+        self::_view()->placeholder('tigerJsonLd')->append(
+            '<script type="application/ld+json">' . $json . '</script>'
+        );
+    }
+
+    /** The site name (tiger.site.name), with a neutral fallback so the brand node is never nameless. */
+    private static function _siteName()
+    {
+        $name = trim((string) self::_config('site.name', ''));
+        return $name !== '' ? $name : 'Tiger';
+    }
+
+    /** Social profile URLs for Organization.sameAs, from tiger.seo.social.* (or tiger.site.social.*). */
+    private static function _sameAs()
+    {
+        $out = [];
+        foreach (['twitter', 'facebook', 'instagram', 'linkedin', 'youtube', 'github'] as $k) {
+            $v = trim((string) self::_config('seo.social.' . $k, self::_config('site.social.' . $k, '')));
+            if ($v !== '') {
+                $out[] = $v;
+            }
+        }
+        return array_values(array_unique($out));
+    }
+
+    /** The absolute site base (scheme://host, no trailing slash) — request-derived, else tiger.site.url. */
+    private static function _base(?Zend_Controller_Request_Abstract $request)
+    {
+        if ($request && method_exists($request, 'getScheme')) {
+            return $request->getScheme() . '://' . $request->getHttpHost();
+        }
+        return rtrim((string) self::_config('site.url', ''), '/');
+    }
+
+    /** A Zend_View to reach the placeholder helper. Any instance shares the process-wide registry. */
+    private static function _view()
+    {
+        if (Zend_Registry::isRegistered('Zend_View')) {
+            $v = Zend_Registry::get('Zend_View');
+            if ($v instanceof Zend_View_Interface) {
+                return $v;
+            }
+        }
+        return new Zend_View();
+    }
+
+    /** Read a `tiger.<dotKey>` config value (org-cascaded, live) with a default. */
+    private static function _config($dotKey, $default = '')
+    {
+        if (!Zend_Registry::isRegistered('Zend_Config')) {
+            return $default;
+        }
+        $node = Zend_Registry::get('Zend_Config')->get('tiger');
+        foreach (explode('.', $dotKey) as $seg) {
+            if (!($node instanceof Zend_Config)) { return $default; }
+            $node = $node->get($seg);
+            if ($node === null) { return $default; }
+        }
+        return is_scalar($node) ? (string) $node : $default;
+    }
+
+    /**
+     * Resolve an image reference to ['url','width','height','mime','alt'] — a `media_id` (looked up for a
+     * real absolute URL + true pixel dimensions) or an already-absolute URL. Null when unresolvable.
+     */
+    private static function _image($ref, $request)
+    {
+        $ref = trim((string) $ref);
+        if ($ref === '') {
+            return null;
+        }
+        if (preg_match('#^https?://#i', $ref)) {
+            return ['url' => $ref, 'width' => null, 'height' => null, 'mime' => null, 'alt' => null];
+        }
+        try {
+            if (!class_exists('Tiger_Model_Media')) { return null; }
+            $model = new Tiger_Model_Media();
+            $row   = $model->findById($ref);
+            if (!$row) { return null; }
+            $arr = $row->toArray();
+            $url = (string) $model->url($arr);
+            if ($url === '') { return null; }
+            if (!preg_match('#^https?://#i', $url) && $request && method_exists($request, 'getScheme')) {
+                $url = $request->getScheme() . '://' . $request->getHttpHost() . '/' . ltrim($url, '/');
+            }
+            return [
+                'url'    => $url,
+                'width'  => $arr['width'] ?? null,
+                'height' => $arr['height'] ?? null,
+                'mime'   => $arr['mime_type'] ?? null,
+                'alt'    => $arr['alt_text'] ?? ($arr['title'] ?? null),
+            ];
+        } catch (Throwable $e) {
+            return null;
+        }
+    }
+}
diff --git a/themes/puma/layouts/scripts/layout.phtml b/themes/puma/layouts/scripts/layout.phtml
index 167e994..4ff0378 100644
--- a/themes/puma/layouts/scripts/layout.phtml
+++ b/themes/puma/layouts/scripts/layout.phtml
@@ -50,6 +50,7 @@ $_lang = defined('LANG') ? LANG : 'en';
     <link rel="stylesheet" href="<?= $this->asset($this->themeAssets . '/custom.css') ?>">
 <?= $this->codeInject('head') ?>
     <?= $this->headLink() ?><?php /* SEO/link registry: rel=canonical, hreflang, … (contributed, e.g. by TigerSEO) */ ?>
+<?= $this->placeholder('tigerJsonLd') ?><?php /* JSON-LD structured data: Organization/WebSite/SiteNavigation (TigerSEO) */ ?>
 <?= $this->pageHead ?? '' ?><?php /* per-page raw head from the CMS page meta (admin-authored) — the escape hatch */ ?>
 </head>
 <body>