diff --git a/hubzilla/addon/dsc01/Widget/Dsc01.php b/hubzilla/addon/dsc01/Widget/Dsc01.php
new file mode 100644
index 0000000..2673657
--- /dev/null
+++ b/hubzilla/addon/dsc01/Widget/Dsc01.php
@@ -0,0 +1,175 @@
+<?php
+
+namespace Zotlabs\Widget;
+
+class Dsc01 {
+
+    public function widget($arr) {
+        $listings = $this->load_listings();
+        return $this->render_directory($listings);
+    }
+
+    // ----------------------------------------------------------------------------
+    // DIRECTORY
+    // ----------------------------------------------------------------------------
+
+    private function render_directory($listings) {
+        $out  = '<div class="dsc01-directory">';
+
+        // Horizontal Bootstrap nav-tabs
+        $out .= '<ul class="nav nav-tabs dsc01-dir-tabs" id="dsc01DirectoryTabs" role="tablist">';
+        $tabs = [
+            ['id' => 'core',   'label' => 'Core',   'active' => true],
+            ['id' => 'tier1',  'label' => 'Tier-I',  'active' => false],
+            ['id' => 'tier2',  'label' => 'Tier-II', 'active' => false],
+            ['id' => 'other',  'label' => 'Other',  'active' => false],
+        ];
+        foreach ($tabs as $tab) {
+            $active   = $tab['active'] ? 'active' : '';
+            $selected = $tab['active'] ? 'true' : 'false';
+            $out .= '
+                <li class="nav-item" role="presentation">
+                    <button class="nav-link ' . $active . '"
+                            id="dsc01-tab-' . $tab['id'] . '"
+                            data-bs-toggle="tab"
+                            data-bs-target="#dsc01-pane-' . $tab['id'] . '"
+                            type="button" role="tab"
+                            aria-selected="' . $selected . '">
+                        ' . $tab['label'] . '
+                    </button>
+                </li>
+            ';
+        }
+        $out .= '</ul>';
+
+        // Tab panes
+        $out .= '<div class="tab-content dsc01-dir-content" id="dsc01DirectoryTabContent">';
+        $out .= '<div class="tab-pane fade show active" id="dsc01-pane-core" role="tabpanel">';
+        $out .= $this->render_core_tab($listings['core'] ?? []);
+        $out .= '</div>';
+        $out .= '<div class="tab-pane fade" id="dsc01-pane-tier1" role="tabpanel">';
+        $out .= $this->render_tier_tab($listings['tier1'] ?? [], 'Mediators, subject matter experts, advisors, and authors will be listed here.');
+        $out .= '</div>';
+        $out .= '<div class="tab-pane fade" id="dsc01-pane-tier2" role="tabpanel">';
+        $out .= $this->render_tier_tab($listings['tier2'] ?? [], 'Attorneys who have concluded HOA homeowner cases in Illinois will be listed here.');
+        $out .= '</div>';
+        $out .= '<div class="tab-pane fade" id="dsc01-pane-other" role="tabpanel">';
+        $out .= $this->render_tier_tab($listings['other'] ?? [], 'Civic organizations, consumer protection entities, and oversight agencies will be listed here.');
+        $out .= '</div>';
+        $out .= '</div>'; // tab-content
+
+        $out .= '</div>'; // dsc01-directory
+        return $out;
+    }
+
+    private function render_core_tab($core_entries) {
+        $slots = [
+            [
+                'slot'        => 'taxonomy-authority',
+                'role'        => 'Taxonomy Authority',
+                'description' => 'The institutional source of the case law categories this diagnostic record is organized by.',
+            ],
+            [
+                'slot'        => 'methodology-certifier',
+                'role'        => 'Methodology Certifier',
+                'description' => 'The law firm whose professional association with this project certifies the diagnostic record meets a standard the legal community can use.',
+            ],
+            [
+                'slot'        => 'peer-operator',
+                'role'        => 'Peer Operator',
+                'description' => 'The cooperating Civic Infrastructure host who can independently verify, support, and if necessary continue this diagnostic record.',
+            ],
+        ];
+
+        // Index populated entries by slot
+        $populated = [];
+        foreach ($core_entries as $entry) {
+            if (!empty($entry['slot']) && ($entry['status'] ?? '') === 'active') {
+                $populated[$entry['slot']] = $entry;
+            }
+        }
+
+        $out = '';
+        foreach ($slots as $slot) {
+            if (isset($populated[$slot['slot']])) {
+                $e    = $populated[$slot['slot']];
+                $name = $this->h($e['name'] ?? '');
+                $url  = $this->h($e['url'] ?? '');
+                $out .= '<div class="dsc01-dir-slot dsc01-slot-active">';
+                $out .= '<div class="dsc01-slot-role">' . $this->h($slot['role']) . '</div>';
+                if ($url) {
+                    $out .= '<div class="dsc01-slot-name"><a href="' . $url . '" target="_blank" rel="noopener">' . $name . '</a></div>';
+                } else {
+                    $out .= '<div class="dsc01-slot-name">' . $name . '</div>';
+                }
+                $out .= '</div>';
+            } else {
+                $out .= '<div class="dsc01-dir-slot dsc01-slot-pending">';
+                $out .= '<div class="dsc01-slot-role">' . $this->h($slot['role']) . '</div>';
+                $out .= '<div class="dsc01-slot-description">' . $this->h($slot['description']) . '</div>';
+                $out .= '<div class="dsc01-slot-status">Invitation pending</div>';
+                $out .= '</div>';
+            }
+        }
+        return $out;
+    }
+
+    private function render_tier_tab($entries, $placeholder) {
+        if (empty($entries)) {
+            return '<div class="dsc01-dir-placeholder text-muted small">' . $this->h($placeholder) . '</div>';
+        }
+        $out = '';
+        foreach ($entries as $entry) {
+            $name = $this->h($entry['name'] ?? '');
+            $role = $this->h($entry['role'] ?? '');
+            $desc = $this->h($entry['description'] ?? '');
+            $url  = $this->h($entry['url'] ?? '');
+            $out .= '<div class="dsc01-dir-entry">';
+            $out .= '<div class="dsc01-entry-role">' . $role . '</div>';
+            if ($url) {
+                $out .= '<div class="dsc01-entry-name"><a href="' . $url . '" target="_blank" rel="noopener">' . $name . '</a></div>';
+            } else {
+                $out .= '<div class="dsc01-entry-name">' . $name . '</div>';
+            }
+            if ($desc) {
+                $out .= '<div class="dsc01-entry-desc">' . $desc . '</div>';
+            }
+            $out .= '</div>';
+        }
+        return $out;
+    }
+
+    // ----------------------------------------------------------------------------
+    // LISTINGS LOADER
+    // ----------------------------------------------------------------------------
+
+    private function load_listings() {
+        $config = $this->load_config();
+        $path   = $config['listings_file'] ?? 'addon/dsc01/listings.json';
+        $raw    = @file_get_contents($path);
+        if ($raw === false) {
+            // Fail visibly — return structure with empty tiers, Core slots will show pending
+            return ['core' => [], 'tier1' => [], 'tier2' => [], 'other' => []];
+        }
+        $data = json_decode($raw, true);
+        if (json_last_error() !== JSON_ERROR_NONE) {
+            return ['core' => [], 'tier1' => [], 'tier2' => [], 'other' => []];
+        }
+        return $data;
+    }
+
+    private function load_config() {
+        $raw = @file_get_contents('addon/dsc01/config.json');
+        if ($raw === false) return [];
+        $data = json_decode($raw, true);
+        return (json_last_error() === JSON_ERROR_NONE) ? $data : [];
+    }
+
+    // ----------------------------------------------------------------------------
+    // HELPER
+    // ----------------------------------------------------------------------------
+
+    private function h($value) {
+        return htmlspecialchars((string) $value, ENT_QUOTES, 'UTF-8');
+    }
+}