diff --git a/scripts/setup-caveau-corpus-ownership.php b/scripts/setup-caveau-corpus-ownership.php
new file mode 100644
index 0000000..0b8c23f
--- /dev/null
+++ b/scripts/setup-caveau-corpus-ownership.php
@@ -0,0 +1,258 @@
+<?php
+declare(strict_types=1);
+
+require_once __DIR__ . '/../includes/bootstrap.php';
+
+if (PHP_SAPI !== 'cli') {
+    fwrite(STDERR, "This setup script must be run from the command line.\n");
+    exit(1);
+}
+
+function ownershipColumnExists(PDO $db, string $table, string $column): bool
+{
+    $stmt = $db->prepare(
+        'SELECT COUNT(*)
+         FROM information_schema.COLUMNS
+         WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = ? AND COLUMN_NAME = ?'
+    );
+    $stmt->execute([$table, $column]);
+    return (int)$stmt->fetchColumn() > 0;
+}
+
+function ownershipJson(array $value): string
+{
+    return json_encode($value, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);
+}
+
+function ownershipMapSchedule(?string $schedule): string
+{
+    return match ($schedule) {
+        'daily' => 'daily',
+        'weekly' => 'weekly',
+        default => 'manual',
+    };
+}
+
+function ownershipScraperTags(array $source, string $packageSlug, string $corpusSlug): string
+{
+    $tags = [];
+    foreach (explode(',', (string)($source['tags'] ?? '')) as $tag) {
+        $tag = trim($tag);
+        if ($tag !== '') {
+            $tags[$tag] = true;
+        }
+    }
+
+    $tags['corpus-source:' . (int)$source['id']] = true;
+    $tags['package:' . $packageSlug] = true;
+    $tags['owned-corpus:' . $corpusSlug] = true;
+
+    return implode(', ', array_keys($tags));
+}
+
+function ownershipScraperDescription(array $source, string $packageSlug, string $corpusName): string
+{
+    $description = trim((string)($source['description'] ?? ''));
+    $suffix = sprintf(
+        'Mirrored from owned Caveau package %s / corpus %s / corpus_sources.id=%d.',
+        $packageSlug,
+        $corpusName,
+        (int)$source['id']
+    );
+
+    return trim($description === '' ? $suffix : $description . "\n\n" . $suffix);
+}
+
+$packageSlug = dbnToolsEnv('DBN_CAVEAU_OWNER_PACKAGE_SLUG') ?: dbnToolsRequiredPackageSlug();
+
+try {
+    $db = dbnToolsDb();
+    $db->beginTransaction();
+
+    $client = dbnToolsFetchClient($db);
+    if (!$client || empty($client['is_active'])) {
+        throw new RuntimeException('Do Better Norge client tenant is not active or was not found.');
+    }
+    $clientId = (int)$client['id'];
+
+    $package = dbnToolsFetchPackage($packageSlug, $db);
+    if (!$package || empty($package['is_active']) || empty($package['corpus_id'])) {
+        throw new RuntimeException("Active package {$packageSlug} with a corpus_id was not found.");
+    }
+    $packageId = (int)$package['id'];
+    $corpusId = (int)$package['corpus_id'];
+
+    if (!dbnToolsHasActiveSubscription($clientId, $packageId, $db)) {
+        $stmt = $db->prepare(
+            'INSERT INTO client_corpus_subscriptions (client_id, package_id, is_active, source)
+             VALUES (?, ?, 1, ?)
+             ON DUPLICATE KEY UPDATE is_active = VALUES(is_active), source = VALUES(source), cancelled_at = NULL'
+        );
+        $stmt->execute([$clientId, $packageId, 'manual']);
+    }
+
+    $stmt = $db->prepare('SELECT id, slug, name FROM corpuses WHERE id = ? LIMIT 1');
+    $stmt->execute([$corpusId]);
+    $corpus = $stmt->fetch(PDO::FETCH_ASSOC);
+    if (!$corpus) {
+        throw new RuntimeException("Corpus #{$corpusId} was not found.");
+    }
+
+    $ownershipUpdates = [];
+    $ownershipValues = [];
+    if (ownershipColumnExists($db, 'corpuses', 'owner_type')) {
+        $ownershipUpdates[] = 'owner_type = ?';
+        $ownershipValues[] = 'client';
+    }
+    if (ownershipColumnExists($db, 'corpuses', 'owner_client_id')) {
+        $ownershipUpdates[] = 'owner_client_id = ?';
+        $ownershipValues[] = $clientId;
+    }
+    if (ownershipColumnExists($db, 'corpuses', 'owner_notes')) {
+        $ownershipUpdates[] = 'owner_notes = ?';
+        $ownershipValues[] = sprintf(
+            'Owned and controlled by Do Better Norge (%s) via %s as of %s. Package: %s.',
+            (string)$client['slug'],
+            (string)($client['contact_email'] ?? 'daveadmin@dobetternorge.no'),
+            date('Y-m-d'),
+            $packageSlug
+        );
+    }
+
+    if ($ownershipUpdates !== []) {
+        $stmt = $db->prepare('UPDATE corpuses SET ' . implode(', ', $ownershipUpdates) . ' WHERE id = ?');
+        $stmt->execute([...$ownershipValues, $corpusId]);
+    }
+
+    $stmt = $db->prepare('SELECT id FROM client_corpora WHERE client_id = ? AND slug = ? LIMIT 1');
+    $stmt->execute([$clientId, 'do-better-norge']);
+    $defaultCorpusId = (int)($stmt->fetchColumn() ?: 0);
+
+    if ($defaultCorpusId > 0) {
+        $db->prepare(
+            'UPDATE client_corpora
+                SET name = ?, description = ?, is_default = 1
+              WHERE id = ? AND client_id = ?'
+        )->execute([
+            'Do Better Norge',
+            'Client-owned Do Better Norge working corpus for documents, source review, and corpus governance.',
+            $defaultCorpusId,
+            $clientId,
+        ]);
+    } else {
+        $stmt = $db->prepare(
+            'INSERT INTO client_corpora (client_id, name, slug, description, is_default)
+             VALUES (?, ?, ?, ?, 1)'
+        );
+        $stmt->execute([
+            $clientId,
+            'Do Better Norge',
+            'do-better-norge',
+            'Client-owned Do Better Norge working corpus for documents, source review, and corpus governance.',
+        ]);
+        $defaultCorpusId = (int)$db->lastInsertId();
+    }
+
+    $db->prepare('UPDATE client_corpora SET is_default = 0 WHERE client_id = ? AND id <> ?')
+       ->execute([$clientId, $defaultCorpusId]);
+
+    $stmt = $db->prepare(
+        'SELECT id, name, description, url, scraper_type, schedule, cron_day, cron_hour,
+                depth, pdf_only, is_active, category, language, tags, total_docs_ingested
+           FROM corpus_sources
+          WHERE corpus_id = ?
+            AND scraper_type IN ("website", "pdf", "rss")
+          ORDER BY is_active DESC, name ASC'
+    );
+    $stmt->execute([$corpusId]);
+    $sources = $stmt->fetchAll(PDO::FETCH_ASSOC);
+
+    $inserted = 0;
+    $updated = 0;
+    foreach ($sources as $source) {
+        $sourceId = (int)$source['id'];
+        $marker = '%corpus-source:' . $sourceId . '%';
+        $lookup = $db->prepare(
+            'SELECT id FROM client_scraper_sources
+              WHERE client_id = ? AND tags LIKE ?
+              LIMIT 1'
+        );
+        $lookup->execute([$clientId, $marker]);
+        $clientSourceId = (int)($lookup->fetchColumn() ?: 0);
+
+        $isActive = (int)!empty($source['is_active']);
+        $status = $isActive === 1 ? 'approved' : 'paused';
+        $schedule = ownershipMapSchedule((string)($source['schedule'] ?? 'manual'));
+        $tags = ownershipScraperTags($source, $packageSlug, (string)$corpus['slug']);
+        $description = ownershipScraperDescription($source, $packageSlug, (string)$corpus['name']);
+        $maxPages = ((string)($source['scraper_type'] ?? '') === 'pdf' || (int)($source['pdf_only'] ?? 0) === 1) ? 100 : 50;
+
+        $values = [
+            (string)$source['name'],
+            (string)$source['url'],
+            $description,
+            (string)$source['scraper_type'],
+            $schedule,
+            (int)($source['cron_day'] ?? 0),
+            (int)($source['cron_hour'] ?? 3),
+            max(1, min(5, (int)($source['depth'] ?? 1))),
+            $maxPages,
+            (int)($source['pdf_only'] ?? 0),
+            (string)($source['category'] ?? 'legal'),
+            (string)($source['language'] ?? 'no'),
+            $tags,
+            $status,
+            'Approved as an owned Do Better Norge source mirrored from the package corpus.',
+            $isActive,
+            (int)($source['total_docs_ingested'] ?? 0),
+        ];
+
+        if ($clientSourceId > 0) {
+            $stmt = $db->prepare(
+                'UPDATE client_scraper_sources
+                    SET name = ?, url = ?, description = ?, scraper_type = ?, schedule = ?,
+                        cron_day = ?, cron_hour = ?, max_depth = ?, max_pages = ?, pdf_only = ?,
+                        category = ?, language = ?, tags = ?, status = ?, approval_notes = ?,
+                        is_active = ?, total_docs_ingested = ?
+                  WHERE id = ? AND client_id = ?'
+            );
+            $stmt->execute([...$values, $clientSourceId, $clientId]);
+            $updated++;
+            continue;
+        }
+
+        $stmt = $db->prepare(
+            'INSERT INTO client_scraper_sources
+                (client_id, name, url, description, scraper_type, schedule, cron_day, cron_hour,
+                 max_depth, max_pages, pdf_only, category, language, tags, status, approval_notes,
+                 approved_at, is_active, total_docs_ingested)
+             VALUES
+                (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, NOW(), ?, ?)'
+        );
+        $stmt->execute([$clientId, ...$values]);
+        $inserted++;
+    }
+
+    $stmt = $db->prepare(
+        'SELECT COUNT(*) FROM corpus_sources
+          WHERE corpus_id = ? AND scraper_type NOT IN ("website", "pdf", "rss")'
+    );
+    $stmt->execute([$corpusId]);
+    $systemOnlySources = (int)$stmt->fetchColumn();
+
+    $db->commit();
+
+    echo "Caveau corpus ownership configured.\n";
+    echo "Client: {$client['slug']} (#{$clientId})\n";
+    echo "Package: {$packageSlug} (#{$packageId})\n";
+    echo "Owned corpus: {$corpus['slug']} (#{$corpusId})\n";
+    echo "Default client corpus: do-better-norge (#{$defaultCorpusId})\n";
+    echo "Client scrapers mirrored: {$inserted} inserted, {$updated} updated\n";
+    echo "System-only package sources skipped: {$systemOnlySources}\n";
+} catch (Throwable $e) {
+    if (isset($db) && $db instanceof PDO && $db->inTransaction()) {
+        $db->rollBack();
+    }
+    fwrite(STDERR, "Ownership setup failed: {$e->getMessage()}\n");
+    exit(1);
+}