diff --git a/plugins/entry-actions/classes/EntryActionsApiController.php b/plugins/entry-actions/classes/EntryActionsApiController.php
index 8e36c20..2d8497a 100644
--- a/plugins/entry-actions/classes/EntryActionsApiController.php
+++ b/plugins/entry-actions/classes/EntryActionsApiController.php
@@ -8,12 +8,15 @@ use Grav\Plugin\Api\Exceptions\ForbiddenException;
 use Grav\Plugin\Api\Exceptions\NotFoundException;
 use Grav\Plugin\Api\Response\ApiResponse;
 use Grav\Plugin\Shared\EntryScopeGuard;
+use Grav\Plugin\Shared\PhotoRenumberer;
 use Psr\Http\Message\ResponseInterface;
 use Psr\Http\Message\ServerRequestInterface;
 
-// Shared R6 guard lives in cache-on-save (the always-present custom plugin);
-// require it so save and delete enforce scope identically (KTD5).
+// Shared R6 guard + the photo-NN renumber helper both live in cache-on-save (the
+// always-present custom plugin); require them so save, delete and reorder enforce
+// scope identically (KTD5) and share one numbering invariant.
 require_once dirname(__DIR__, 2) . '/cache-on-save/classes/EntryScopeGuard.php';
+require_once dirname(__DIR__, 2) . '/cache-on-save/classes/PhotoRenumberer.php';
 
 /**
  * DELETE /api/v1/entry/{slug}
@@ -58,4 +61,61 @@ class EntryActionsApiController extends AbstractApiController
 
         return ApiResponse::noContent();
     }
+
+    /**
+     * POST /api/v1/entry/{slug}/photos/order
+     *
+     * Body: { "order": ["photo-x.jpg", "photo-y.jpg", …] } — the entry's image
+     * files in the display order the owner arranged. Renames them to photo-01..NN
+     * so the feed cover (media.images|first) and numeric client sort follow the
+     * drag. Same guard chain as deleteEntry: OWNER + direct-child-of-active-dailies.
+     *
+     * Filename safety is defence in depth: unsafe segments (containing '/' or '..')
+     * are dropped here, and PhotoRenumberer only ever renames files that already
+     * exist as image media in the folder — so a crafted order body can never touch
+     * the entry .md, a .gpx or a .meta.yaml sidecar.
+     */
+    public function reorderPhotos(ServerRequestInterface $request): ResponseInterface
+    {
+        // Authenticated OWNER only (KTD8). getUser() throws 401 for anonymous.
+        $user = $this->getUser($request);
+        if (!EntryScopeGuard::isOwnerUser($this->grav, $user)) {
+            throw new ForbiddenException('Only the site owner can reorder entry photos.');
+        }
+
+        $slug = $this->getRouteParam($request, 'slug');
+        if (!is_string($slug) || !EntryScopeGuard::isSafeSegment($slug)) {
+            throw new ApiException(400, 'Bad Request', 'Invalid entry slug.');
+        }
+
+        $page = EntryScopeGuard::resolveActiveDailyChild($this->grav, $slug);
+        if ($page === null) {
+            throw new NotFoundException('Entry not found in the active trip.');
+        }
+
+        $path = $page->path();
+        if (!is_string($path) || $path === '' || !is_dir($path)) {
+            throw new NotFoundException('Entry folder not found.');
+        }
+
+        // Reduce the body's `order` to a clean list of safe basenames. Anything
+        // unsafe or non-string is dropped; PhotoRenumberer then keeps only the
+        // entries that are real image files on disk.
+        $body = $this->getRequestBody($request);
+        $order = $body['order'] ?? null;
+        if (!is_array($order)) {
+            throw new ApiException(400, 'Bad Request', 'Body must include an "order" array of filenames.');
+        }
+        $names = [];
+        foreach ($order as $name) {
+            if (is_string($name) && EntryScopeGuard::isSafeSegment($name)) {
+                $names[] = $name;
+            }
+        }
+
+        PhotoRenumberer::renumber($path, $names);
+        $this->grav['cache']->deleteAll();
+
+        return ApiResponse::noContent();
+    }
 }
diff --git a/plugins/entry-actions/entry-actions.php b/plugins/entry-actions/entry-actions.php
index 9d82d05..0f3c9eb 100644
--- a/plugins/entry-actions/entry-actions.php
+++ b/plugins/entry-actions/entry-actions.php
@@ -8,12 +8,16 @@ use RocketTheme\Toolbox\Event\Event;
  * Entry Actions — a thin, purpose-built API surface for owner-only, active-trip
  * scoped journal-entry actions that the stock Grav API cannot express safely.
  *
- * M1 registers exactly one route: DELETE /api/v1/entry/{slug}. The stock
- * DELETE /api/v1/pages<route> only checks write-permission (no trip scope, and
- * any admin passes), which violates R6. This route requires the configured site
- * OWNER and asserts the target is a direct child of the active trip's dailies
- * container — sharing one guard (EntryScopeGuard) with the save path so the two
- * R6 enforcement points cannot diverge (KTD5).
+ * Routes:
+ *   - DELETE /api/v1/entry/{slug}            — delete a journal entry folder
+ *   - POST   /api/v1/entry/{slug}/photos/order — reorder an entry's photos
+ *
+ * The stock DELETE /api/v1/pages<route> only checks write-permission (no trip
+ * scope, and any admin passes), which violates R6; and no stock endpoint can
+ * rename media to the photo-NN cover order at all. Both custom routes require the
+ * configured site OWNER and assert the target is a direct child of the active
+ * trip's dailies container — sharing one guard (EntryScopeGuard) with the save
+ * path so the R6 enforcement points cannot diverge (KTD5).
  *
  * Custom-in-repo (NOT GPM-managed): tracked via a `!` negation in user/.gitignore
  * and deployed with the content push, like cache-on-save. Never in plugins.txt.
@@ -56,5 +60,10 @@ class EntryActionsPlugin extends Plugin
     {
         $routes = $event['routes'];
         $routes->delete('/entry/{slug}', [EntryActions\EntryActionsApiController::class, 'deleteEntry']);
+        // Reorder an entry's photos to a client-supplied order → rename to
+        // photo-01..NN so the feed cover (media.images|first) follows the drag.
+        // Nested-static-after-param, same shape as the DELETE above — it only
+        // registers once the API route-map cache is rebuilt (deploy must clear cache).
+        $routes->post('/entry/{slug}/photos/order', [EntryActions\EntryActionsApiController::class, 'reorderPhotos']);
     }
 }