diff --git a/includes/Extensions/Batch17.php b/includes/Extensions/Batch17.php
new file mode 100644
index 0000000..aedce24
--- /dev/null
+++ b/includes/Extensions/Batch17.php
@@ -0,0 +1,100 @@
+<?php
+/**
+ * Batch 17 — Caching, unified (Pro-equivalent, net-new).
+ *
+ * One cache family across the common engines: LiteSpeed (also Hostinger's
+ * stack), W3 Total Cache, WP Rocket, WP Super Cache, WP Fastest Cache,
+ * Autoptimize, plus the WordPress object cache. Each handler calls only the
+ * engines actually present, so it is safe everywhere (no guard needed).
+ * GPL-2.0-or-later. See NOTICE.md.
+ */
+
+namespace AskTamMCP\Extensions;
+
+defined('ABSPATH') || exit;
+
+class Batch17 {
+
+    public static function register($registry): void {
+        $def = function (string $name, string $desc, array $props, array $required, string $scope, string $method) {
+            $schema = ['type' => 'object', 'properties' => $props];
+            if ($required) $schema['required'] = $required;
+            return ['name' => $name, 'description' => $desc, 'scope' => $scope,
+                    'handler' => 'AskTamMCP\\Extensions\\Batch17::' . $method, 'inputSchema' => $schema];
+        };
+
+        $registry->register($def('cache_detect', 'Detect active caching: page-cache plugins (LiteSpeed, W3TC, WP Rocket, WP Super Cache, WP Fastest Cache), Autoptimize, and whether a persistent object cache is in use.',
+            [], [], 'read', 'detect'));
+
+        $registry->register($def('cache_status', 'Cache status summary: object-cache backend (if any), detected page-cache engine, and Autoptimize state.',
+            [], [], 'read', 'status'));
+
+        $registry->register($def('cache_purge_all', 'Purge all caches across every detected engine (page cache + Autoptimize + object cache). Returns which engines were purged.',
+            [], [], 'write', 'purgeAll'));
+
+        $registry->register($def('cache_purge_url', 'Purge the cache for a single URL where the engine supports it (LiteSpeed, WP Rocket). Falls back to reporting unsupported engines.',
+            ['url' => ['type' => 'string']], ['url'], 'write', 'purgeUrl'));
+    }
+
+    private static function engines(): array {
+        return [
+            'litespeed'       => defined('LSCWP_V') || defined('LSCWP_CUR_V') || has_action('litespeed_purge_all'),
+            'w3tc'            => function_exists('w3tc_flush_all'),
+            'wp_rocket'       => function_exists('rocket_clean_domain'),
+            'wp_super_cache'  => function_exists('wp_cache_clear_cache'),
+            'wp_fastest_cache'=> class_exists('WpFastestCache'),
+            'autoptimize'     => class_exists('autoptimizeCache'),
+            'object_cache'    => wp_using_ext_object_cache(),
+        ];
+    }
+
+    public static function detect(array $args): array {
+        $e = self::engines();
+        return ['engines' => $e, 'active' => array_values(array_keys(array_filter($e)))];
+    }
+
+    public static function status(array $args): array {
+        global $wp_object_cache;
+        $backend = 'none';
+        if (wp_using_ext_object_cache()) {
+            if (class_exists('Redis') && stripos(get_class($wp_object_cache), 'redis') !== false) $backend = 'redis';
+            elseif (stripos(get_class($wp_object_cache), 'memcach') !== false) $backend = 'memcached';
+            else $backend = 'external(' . get_class($wp_object_cache) . ')';
+        }
+        $e = self::engines();
+        $page = array_values(array_keys(array_filter([
+            'litespeed' => $e['litespeed'], 'w3tc' => $e['w3tc'], 'wp_rocket' => $e['wp_rocket'],
+            'wp_super_cache' => $e['wp_super_cache'], 'wp_fastest_cache' => $e['wp_fastest_cache'],
+        ])));
+        return ['object_cache' => $backend, 'page_cache_engines' => $page, 'autoptimize' => $e['autoptimize']];
+    }
+
+    public static function purgeAll(array $args): array {
+        $did = [];
+        if (defined('LSCWP_V') || defined('LSCWP_CUR_V') || has_action('litespeed_purge_all')) { do_action('litespeed_purge_all'); $did[] = 'litespeed'; }
+        if (function_exists('w3tc_flush_all')) { w3tc_flush_all(); $did[] = 'w3tc'; }
+        if (function_exists('rocket_clean_domain')) { rocket_clean_domain(); $did[] = 'wp_rocket'; }
+        if (function_exists('wp_cache_clear_cache')) { wp_cache_clear_cache(); $did[] = 'wp_super_cache'; }
+        if (class_exists('WpFastestCache')) {
+            global $wp_fastest_cache;
+            if (is_object($wp_fastest_cache) && method_exists($wp_fastest_cache, 'deleteCache')) { $wp_fastest_cache->deleteCache(true); $did[] = 'wp_fastest_cache'; }
+        }
+        if (class_exists('autoptimizeCache') && method_exists('autoptimizeCache', 'clearall')) { \autoptimizeCache::clearall(); $did[] = 'autoptimize'; }
+        if (wp_using_ext_object_cache()) { wp_cache_flush(); $did[] = 'object_cache'; }
+        return ['purged' => $did, 'count' => count($did)];
+    }
+
+    public static function purgeUrl(array $args): array {
+        $url = esc_url_raw((string) ($args['url'] ?? ''));
+        if ($url === '') throw new \RuntimeException('url required.');
+        $did = [];
+        $unsupported = [];
+        if (defined('LSCWP_V') || defined('LSCWP_CUR_V') || has_action('litespeed_purge_url')) { do_action('litespeed_purge_url', $url); $did[] = 'litespeed'; }
+        if (function_exists('rocket_clean_files')) { rocket_clean_files([$url]); $did[] = 'wp_rocket'; }
+        foreach (['w3tc', 'wp_super_cache', 'wp_fastest_cache'] as $e) {
+            if (self::engines()[$e]) $unsupported[] = $e;
+        }
+        if (!$did && !$unsupported) throw new \RuntimeException('No URL-capable cache engine detected.');
+        return ['url' => $url, 'purged' => $did, 'no_per_url_support' => $unsupported];
+    }
+}