feat(cache): WP Fastest Cache statt WP Super Cache

Die Cache-Integration war für WP Super Cache gebaut, eingesetzt wird aber WP Fastest Cache. Profil (wpfc), Listener, Drosselung, lit/cache-clear und Leeren-Probe laufen jetzt über die öffentlichen WPFC-Funktionen wpfc_clear_post_cache_by_id/wpfc_clear_all_cache; die Probe leert nur die Wegwerf-Seite (singleDeleteCache ohne Elternseiten) und prüft, dass WPFC den Hook noch verarbeitet. Smoke fastest-cache-smoke.sh ersetzt den WPSC-Smoke. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-11-06 19:57:55 +01:00
parent e1fad3dffe
commit bee9da3a86
33 changed files with 1231 additions and 1441 deletions
@@ -100,11 +100,10 @@ nichts geändert. Vorgehen:
   `compat_incompatible`; der Stand steht im selben Reiter „Kompatibilität“.

 Seitenweite Änderungen (Optionen, Menüs und Menü-Positionen, Medien, Divi-Design, Theme Builder, globale
-Bibliotheksmodule) leeren den Cache von WP Super Cache, Änderungen an einem Beitrag nur dessen Seite. Dabei leert der
-Purge eines einzelnen Beitrags die Cache-Dateien unter dem Host, über den der MCP-Aufruf eingeht; bei verschiedenen
-Hosts (z. B. mit und ohne `www`) bleiben die Dateien des anderen Hosts womöglich ungeleert (der Komplett-Purge ist davon
-nicht betroffen). Ist der Cache dafür gesperrt, bleibt er unverändert; der Zustand steht im Reiter „Kompatibilität“
-und in `lit-site-status` (`wpsc`). Der Nachlauf-Purge, der auf ein gedrosseltes Leeren des ganzen Caches folgt, braucht
+Bibliotheksmodule) leeren den Cache von WP Fastest Cache, Änderungen an einem Beitrag dessen Seite samt Startseite,
+Feeds, Sitemap, Nachbarbeiträgen und Archiven seiner Begriffe (so leert WP Fastest Cache einen Beitrag). Ist der Cache
+dafür gesperrt, bleibt er unverändert; der Zustand steht im Reiter „Kompatibilität“
+und in `lit-site-status` (`wpfc`). Der Nachlauf-Purge, der auf ein gedrosseltes Leeren des ganzen Caches folgt, braucht
 WP-Cron (oder einen System-Cron, der `wp-cron.php` aufruft). Auf Divi-Seiten leert jede Prüfung im Reiter den ganzen
 Cache einmal: Divi selbst leert ihn beim Anlegen und Löschen der Testseite. Wurde etwas außerhalb von LIT MCP
 geändert, leert `lit/cache-clear` den Cache auf Wunsch (`scope` `all` oder `post` mit `post_id`; erst Probelauf, dann
@@ -8,7 +8,7 @@ use Closure;

 defined('ABSPATH') || exit;

-/** The one check step a profile's behaviour probe makes (Profile::$extraSteps), shared by Pods and WP Super Cache. */
+/** The one check step a profile's behaviour probe makes (Profile::$extraSteps), shared by Pods and WP Fastest Cache. */
 final class ProbeStep
 {
    /**
@@ -22,7 +22,7 @@ defined('ABSPATH') || exit;
 */
 final class ThrowawayPost
 {
-    /** Meta key and title prefix the Pods and WP Super Cache probes give their entries (the Divi write probe has its own). */
+    /** Meta key and title prefix the Pods and WP Fastest Cache probes give their entries (the Divi write probe has its own). */
    public const MARKER = '_lit_mcp_check_entry';

    public const TITLE = '[LIT MCP Prüfung]';
@@ -2,7 +2,7 @@

 declare(strict_types=1);

-namespace LIT\MCP\Integrations\SuperCache;
+namespace LIT\MCP\Integrations\FastestCache;

 use LIT\MCP\Abilities\Ability;
 use LIT\MCP\Abilities\Annotations;
@@ -17,18 +17,19 @@ use WP_Post;
 defined('ABSPATH') || exit;

 /**
- * lit/cache-clear: empties the WP Super Cache on request – for changes made outside this plugin (the plugin's own
- * writes empty it anyway, SuperCacheListener). Dry run without confirm; with confirm: true the whole cache goes
- * through the same throttle and trailing purge as the listener (SuperCachePurger), a post through wp_cache_post_edit,
- * which skips every status but publish and private. The change log entry is ignored by the listener (NAME).
+ * lit/cache-clear: empties the WP Fastest Cache on request – for changes made outside this plugin (the plugin's own
+ * writes empty it anyway, FastestCacheListener). Dry run without confirm; with confirm: true the whole cache goes
+ * through the same throttle and trailing purge as the listener (FastestCachePurger), a post through
+ * wpfc_clear_post_cache_by_id (any status: WPFC also finds the address of a trashed post). The change log entry is
+ * ignored by the listener (NAME).
 */
 final class CacheClearAbility implements Ability, DeclaresRequirements
 {
    public const NAME = 'lit/cache-clear';

-    private const OUTCOMES = ['purged', 'throttled', 'nothing', 'cache_off'];
+    private const OUTCOMES = ['purged', 'throttled', 'cache_off'];

-    public function __construct(private SuperCachePurger $purger, private ChangeLog $log)
+    public function __construct(private FastestCachePurger $purger, private ChangeLog $log)
    {
    }

@@ -44,7 +45,7 @@ final class CacheClearAbility implements Ability, DeclaresRequirements

    public function description(): string
    {
-        return 'Leert den Seiten-Cache von WP Super Cache: scope "all" den ganzen Cache, scope "post" nur die Seite '
+        return 'Leert den Seiten-Cache von WP Fastest Cache: scope "all" den ganzen Cache, scope "post" nur die Seite '
            . 'eines Beitrags (post_id). Änderungen durch LIT MCP leeren ihn ohnehin automatisch – das Tool ist für '
            . 'Fälle, in denen etwas außerhalb von LIT MCP geändert wurde. Ohne confirm nur Probelauf (nichts wird '
            . 'geleert); mit confirm: true nach Rückfrage beim Nutzer ausführen. Das Leeren des ganzen Caches ist auf '
@@ -89,8 +90,8 @@ final class CacheClearAbility implements Ability, DeclaresRequirements
    public function requirements(array $input): array
    {
        return match ($input['scope'] ?? null) {
-            'all' => [SuperCacheFeature::PurgeAll->id()],
-            'post' => [SuperCacheFeature::PurgePost->id()],
+            'all' => [FastestCacheFeature::PurgeAll->id()],
+            'post' => [FastestCacheFeature::PurgePost->id()],
            default => [],
        };
    }
@@ -123,34 +124,26 @@ final class CacheClearAbility implements Ability, DeclaresRequirements
            return $this->result(
                $scope,
                'cache_off',
-                'Der Seiten-Cache von WP Super Cache ist ausgeschaltet; nichts zu leeren.'
+                'Der Seiten-Cache von WP Fastest Cache ist ausgeschaltet; nichts zu leeren.'
            );
        }

        if ($post !== null) {
-            if (! $this->clearsStatus($post)) {
-                return $this->result($scope, 'nothing', sprintf(
-                    'Nichts zu leeren: "%s" ist ein Entwurf bzw. nicht veröffentlicht (Status %s); WP Super Cache '
-                        . 'cacht ihn nicht.',
-                    $post->post_title,
-                    $post->post_status
-                ));
-            }
-            $outcome = $this->purger->post((int) $post->ID) ? SuperCachePurger::PURGED : SuperCachePurger::LOCKED;
+            $outcome = $this->purger->post((int) $post->ID) ? FastestCachePurger::PURGED : FastestCachePurger::LOCKED;
        } else {
            $outcome = $this->purger->everything();
        }
-        if ($outcome === SuperCachePurger::LOCKED) {
+        if ($outcome === FastestCachePurger::LOCKED) {
            return Errors::make(
                'compat_incompatible',
-                'WP Super Cache ist gesperrt (siehe Reiter Kompatibilität). Es wurde nichts geleert.',
-                'Den Nutzer informieren, dass die Kompatibilität von WP Super Cache geprüft werden muss.',
+                'WP Fastest Cache ist gesperrt (siehe Reiter Kompatibilität). Es wurde nichts geleert.',
+                'Den Nutzer informieren, dass die Kompatibilität von WP Fastest Cache geprüft werden muss.',
                423
            );
        }

        $summary = match ($outcome) {
-            SuperCachePurger::THROTTLED => 'Der ganze Seiten-Cache wurde vor weniger als 30 Sekunden geleert; das '
+            FastestCachePurger::THROTTLED => 'Der ganze Seiten-Cache wurde vor weniger als 30 Sekunden geleert; das '
                . 'Leeren folgt als Nachlauf per WP-Cron.',
            default => ucfirst($what) . ' wurde geleert.',
        };
@@ -166,8 +159,6 @@ final class CacheClearAbility implements Ability, DeclaresRequirements
            $note = ' Der Cache ist ausgeschaltet; es würde nichts geleert.';
        } elseif ($throttled) {
            $note = ' Das Leeren wäre gerade gedrosselt und folgt als Nachlauf.';
-        } elseif ($post !== null && ! $this->clearsStatus($post)) {
-            $note = ' Der Beitrag ist nicht veröffentlicht; es gäbe nichts zu leeren.';
        }

        return Errors::confirmRequired(
@@ -188,7 +179,7 @@ final class CacheClearAbility implements Ability, DeclaresRequirements
            $logId = FollowUp::run(
                fn () => $this->log->record(
                    self::NAME,
-                    'wpsc',
+                    'wpfc',
                    $post === null ? 'all' : (string) $post->ID,
                    $summary
                ),
@@ -202,12 +193,6 @@ final class CacheClearAbility implements Ability, DeclaresRequirements
        return $result->toArray();
    }

-    /** WPSC skips everything but publish and private unless WPSCFORCEUPDATE is defined (wp_cache_post_edit). */
-    private function clearsStatus(WP_Post $post): bool
-    {
-        return defined('WPSCFORCEUPDATE') || in_array($post->post_status, ['publish', 'private'], true);
-    }
-
    /**
     * The checked target: the WP_Post of scope "post", true for "all" – or the error. Input is not schema-validated
     * yet when permission() runs.
@@ -2,7 +2,7 @@

 declare(strict_types=1);

-namespace LIT\MCP\Integrations\SuperCache;
+namespace LIT\MCP\Integrations\FastestCache;

 use Closure;
 use LIT\MCP\Compatibility\CheckStep;
@@ -10,8 +10,8 @@ use LIT\MCP\Compatibility\ProbeStep;

 defined('ABSPATH') || exit;

-/** The check step only WP Super Cache has (the purge probe, SuperCacheProbe) and its labels. */
-final class SuperCacheCheckSteps
+/** The check step only WP Fastest Cache has (the purge probe, FastestCacheProbe) and its labels. */
+final class FastestCacheCheckSteps
 {
    public const PROBE = 'probe';

@@ -19,10 +19,10 @@ final class SuperCacheCheckSteps
    private const LABEL_CACHE_OFF = self::LABEL . ' (Cache ist ausgeschaltet, nicht geprüft)';

    /**
-     * The Profile::$extraSteps of WP Super Cache. A switched-off cache is a green step that says so: a skipped step
+     * The Profile::$extraSteps of WP Fastest Cache. A switched-off cache is a green step that says so: a skipped step
     * would lock the purge on a site that caches nothing.
     *
-     * @param Closure(): (list<string>|null) $probe SuperCacheProbe::run().
+     * @param Closure(): (list<string>|null) $probe FastestCacheProbe::run().
     * @return Closure(bool): list<CheckStep>
     */
    public static function extra(Closure $probe): Closure
@@ -35,7 +35,7 @@ final class SuperCacheCheckSteps
        // Reports saved before labels were stored have none.
        return $step->label
            ?? ($step->key === self::PROBE ? self::LABEL : null)
-            ?? CheckStep::genericLabel($step->key, SuperCacheCompatibility::LABEL)
+            ?? CheckStep::genericLabel($step->key, FastestCacheCompatibility::LABEL)
            ?? $step->key;
    }
 }
@@ -0,0 +1,72 @@
+<?php
+
+declare(strict_types=1);
+
+namespace LIT\MCP\Integrations\FastestCache;
+
+use LIT\MCP\Compatibility\Call;
+use LIT\MCP\Compatibility\ConstantRequirement;
+use LIT\MCP\Compatibility\GlobalRequirement;
+use LIT\MCP\Compatibility\Manifest;
+use LIT\MCP\Compatibility\Profile;
+use LIT\MCP\Compatibility\Tier;
+
+defined('ABSPATH') || exit;
+
+/**
+ * WP Fastest Cache as a compatibility profile: the two public purge functions FastestCacheListener calls, checked
+ * against 1.5.5 (wpFastestCache.php). Both only fire an action the WpFastestCache instance hooks in its constructor
+ * (singleDeleteCache, deleteCache); the probe exercises singleDeleteCache and checks that hook (FastestCacheProbe).
+ * The cache switch lives in the global $wp_fastest_cache_options (the decoded option WpFastestCache).
+ */
+final class FastestCacheCompatibility
+{
+    public const LABEL = 'WP Fastest Cache';
+
+    public static function profile(): Profile
+    {
+        $all = FastestCacheFeature::cases();
+
+        return new Profile(
+            id: 'wpfc',
+            label: self::LABEL,
+            tier: Tier::LockOnFailure,
+            capabilities: $all,
+            manifests: [new Manifest(
+                'WP Fastest Cache',
+                calls: [
+                    new Call('wpfc_clear_post_cache_by_id', 1, [FastestCacheFeature::PurgePost]),
+                    new Call('wpfc_clear_all_cache', 0, [FastestCacheFeature::PurgeAll]),
+                    new Call('WpFastestCache::singleDeleteCache', 3, [FastestCacheFeature::PurgePost]),
+                    new Call('WpFastestCache::getWpContentDir', 1, [FastestCacheFeature::PurgePost]),
+                ],
+                constants: [new ConstantRequirement('WPFC_MAIN_PATH', $all)],
+                globals: [
+                    new GlobalRequirement('wp_fastest_cache', $all),
+                    new GlobalRequirement('wp_fastest_cache_options', $all),
+                ]
+            )],
+            active: static fn (): bool => defined('WPFC_MAIN_PATH'),
+            version: static function (): ?string {
+                if (! defined('WPFC_MAIN_PATH')) {
+                    return null;
+                }
+                $header = get_file_data(WPFC_MAIN_PATH . 'wpFastestCache.php', ['Version' => 'Version']);
+                $version = $header['Version'] ?? '';
+
+                return $version === '' ? null : $version;
+            },
+            testedVersions: ['1.5.5'],
+            extraSteps: FastestCacheCheckSteps::extra(static fn (): ?array => (new FastestCacheProbe())->run()),
+            stepLabel: FastestCacheCheckSteps::label(...)
+        );
+    }
+
+    /** WPFC caches only while its switch is on (wpFastestCacheStatus in the decoded option, an object or []). */
+    public static function cacheEnabled(): bool
+    {
+        $options = $GLOBALS['wp_fastest_cache_options'] ?? null;
+
+        return is_object($options) && ! empty($options->wpFastestCacheStatus);
+    }
+}
@@ -2,7 +2,7 @@

 declare(strict_types=1);

-namespace LIT\MCP\Integrations\SuperCache;
+namespace LIT\MCP\Integrations\FastestCache;

 use LIT\MCP\Compatibility\Capability;

@@ -11,11 +11,11 @@ defined('ABSPATH') || exit;
 // The installed PHPCompatibility sniffs predate enums (PHP 8.1) and read their methods as plain functions.
 // phpcs:disable PHPCompatibility.Variables.ForbiddenThisUseContexts.OutsideObjectContext

-/** What the plugin does to WP Super Cache: empty its cache for one post or entirely. */
-enum SuperCacheFeature: string implements Capability
+/** What the plugin does to WP Fastest Cache: empty its cache for one post or entirely. */
+enum FastestCacheFeature: string implements Capability
 {
-    case PurgePost = 'wpsc-purge-post';
-    case PurgeAll = 'wpsc-purge-all';
+    case PurgePost = 'wpfc-purge-post';
+    case PurgeAll = 'wpfc-purge-all';

    public function id(): string
    {
@@ -2,7 +2,7 @@

 declare(strict_types=1);

-namespace LIT\MCP\Integrations\SuperCache;
+namespace LIT\MCP\Integrations\FastestCache;

 use LIT\MCP\Admin\CompatibilityTab;
 use LIT\MCP\ChangeLog\ChangeLog;
@@ -13,22 +13,22 @@ use LIT\MCP\Integrations\Integration;
 defined('ABSPATH') || exit;

 /**
- * WP Super Cache: the compatibility profile (SuperCacheListener purges after writes, wired by Plugin), the cleanup of
- * probe pages a dead check left behind and the tool lit/cache-clear – a tool group only while WP Super Cache is
- * loaded.
+ * WP Fastest Cache: the compatibility profile (FastestCacheListener purges after writes, wired by Plugin), the
+ * cleanup of probe pages a dead check left behind and the tool lit/cache-clear – a tool group only while WP Fastest
+ * Cache is loaded.
 */
-final class SuperCacheIntegration implements Integration, ProvidesCompatibility, Bootable
+final class FastestCacheIntegration implements Integration, ProvidesCompatibility, Bootable
 {
    /** @var callable(): bool */
    private $available;

-    /** @param callable(): bool|null $available Whether WP Super Cache is loaded; null = WPCACHEHOME is defined. */
+    /** @param callable(): bool|null $available Whether WP Fastest Cache is loaded; null = WPFC_MAIN_PATH is defined. */
    public function __construct(
        ?callable $available,
-        private SuperCachePurger $purger,
+        private FastestCachePurger $purger,
        private ChangeLog $log
    ) {
-        $this->available = $available ?? static fn (): bool => defined('WPCACHEHOME');
+        $this->available = $available ?? static fn (): bool => defined('WPFC_MAIN_PATH');
    }

    public function boot(): void
@@ -37,24 +37,25 @@ final class SuperCacheIntegration implements Integration, ProvidesCompatibility,
    }

    /**
-     * lit_mcp_compat_profile_load('wpsc'), before any output: deletes probe pages a dead check left behind
-     * (SuperCacheProbe::removeOrphans()). A GET without nonce on purpose: only the plugin's own leftovers, idempotent.
+     * lit_mcp_compat_profile_load('wpfc'), before any output: deletes probe pages a dead check left behind
+     * (FastestCacheProbe::removeOrphans()). A GET without nonce on purpose: only the plugin's own leftovers,
+     * idempotent.
     */
    public function removeOrphans(string $profileId): void
    {
-        if ($profileId === 'wpsc' && $this->isAvailable() && current_user_can('manage_options')) {
-            SuperCacheProbe::removeOrphans();
+        if ($profileId === 'wpfc' && $this->isAvailable() && current_user_can('manage_options')) {
+            FastestCacheProbe::removeOrphans();
        }
    }

    public function id(): string
    {
-        return 'wpsc';
+        return 'wpfc';
    }

    public function label(): string
    {
-        return SuperCacheCompatibility::LABEL;
+        return FastestCacheCompatibility::LABEL;
    }

    public function isAvailable(): bool
@@ -69,6 +70,6 @@ final class SuperCacheIntegration implements Integration, ProvidesCompatibility,

    public function compatibilities(): array
    {
-        return [SuperCacheCompatibility::profile()];
+        return [FastestCacheCompatibility::profile()];
    }
 }
@@ -2,7 +2,7 @@

 declare(strict_types=1);

-namespace LIT\MCP\Integrations\SuperCache;
+namespace LIT\MCP\Integrations\FastestCache;

 use Closure;
 use LIT\MCP\Admin\CompatibilityTab;
@@ -14,25 +14,26 @@ use Throwable;
 defined('ABSPATH') || exit;

 /**
- * Empties the WP Super Cache after a write of this plugin (hook lit_mcp_changed). WPSC purges on its own only what
- * goes through wp_update_post: field, term and featured-image updates, options, menu locations, Divi design,
- * theme builder and global library modules it never sees.
+ * Empties the WP Fastest Cache after a write of this plugin (hook lit_mcp_changed). WPFC purges on its own only on
+ * post status transitions (and only with its "new post"/"update post" settings on) and term edits: field, term and
+ * featured-image updates, options, menu locations, Divi design, theme builder and global library modules it never
+ * sees.
 *
 * Purge with trailing run: the listener only collects, one purge runs at the end of the request (shutdown). A post
- * of a public post type (not attachment) that still exists: that post (wp_cache_post_edit, which skips drafts and
- * honours the user's "clear all on edit" setting). More than one post, or anything else: the whole cache of this
- * site, once. The whole-cache purge runs at most every THROTTLE seconds (a client looping over media updates must
- * not keep the cache empty): a purge inside the lock time schedules exactly one trailing purge (TRAILING_HOOK) at
- * its end (SuperCachePurger, shared with lit/cache-clear). Single-post purges are never throttled. The release/withdraw
- * entries of the check workflow change nothing on the site and purge nothing; the entries of lit/cache-clear purged
- * themselves.
+ * of a public post type (not attachment) that still exists: that post (wpfc_clear_post_cache_by_id, which also
+ * clears the home page, feeds, sitemap, neighbours and term archives of the post). More than one post, or anything
+ * else: the whole cache of this site, once. The whole-cache purge runs at most every THROTTLE seconds (a client
+ * looping over media updates must not keep the cache empty): a purge inside the lock time schedules exactly one
+ * trailing purge (TRAILING_HOOK) at its end (FastestCachePurger, shared with lit/cache-clear). Single-post purges are
+ * never throttled. The release/withdraw entries of the check workflow change nothing on the site and purge nothing;
+ * the entries of lit/cache-clear purged themselves.
 */
-final class SuperCacheListener
+final class FastestCacheListener
 {
-    public const TRAILING_HOOK = SuperCachePurger::TRAILING_HOOK;
-    public const PURGED_AT = SuperCachePurger::PURGED_AT;
+    public const TRAILING_HOOK = FastestCachePurger::TRAILING_HOOK;
+    public const PURGED_AT = FastestCachePurger::PURGED_AT;

-    private SuperCachePurger $purger;
+    private FastestCachePurger $purger;
    private Closure $postIdFor;
    /** @var array<int, true> posts changed in this request */
    private array $posts = [];
@@ -40,12 +41,12 @@ final class SuperCacheListener
    private bool $queued = false;

    /**
-     * Defaults are the real WPSC and WordPress functions; closures only for tests.
+     * Defaults are the real WPFC and WordPress functions; closures only for tests.
     *
-     * @param Closure(SuperCacheFeature): bool       $usable       Compatibility::usable().
-     * @param (Closure(): bool)|null                  $cacheEnabled WPSC caching switched on ($cache_enabled).
-     * @param (Closure(int): void)|null               $purgePost    wp_cache_post_edit($postId).
-     * @param (Closure(int): void)|null               $purgeAll     wp_cache_clear_cache($blogId), 0 = all sites.
+     * @param Closure(FastestCacheFeature): bool       $usable       Compatibility::usable().
+     * @param (Closure(): bool)|null                  $cacheEnabled WPFC caching switched on.
+     * @param (Closure(int): void)|null               $purgePost    wpfc_clear_post_cache_by_id($postId).
+     * @param (Closure(): void)|null                  $purgeAll     wpfc_clear_all_cache().
     * @param (Closure(string, string): ?int)|null    $postIdFor    Post ID if objectType/objectId name an existing
     *                                                              post of a public type but attachment.
     */
@@ -56,7 +57,7 @@ final class SuperCacheListener
        ?Closure $purgeAll = null,
        ?Closure $postIdFor = null
    ) {
-        $this->purger = new SuperCachePurger($usable, $cacheEnabled, $purgePost, $purgeAll);
+        $this->purger = new FastestCachePurger($usable, $cacheEnabled, $purgePost, $purgeAll);
        $this->postIdFor = $postIdFor ?? self::publicPostId(...);
    }

@@ -91,7 +92,7 @@ final class SuperCacheListener
                add_action('shutdown', [$this, 'flush']);
            }
        } catch (Throwable $e) {
-            Log::failure('WP Super Cache purge', $e);
+            Log::failure('WP Fastest Cache purge', $e);
        }
    }

@@ -110,7 +111,7 @@ final class SuperCacheListener
                $this->purger->post($posts[0]);
            }
        } catch (Throwable $e) {
-            Log::failure('WP Super Cache purge', $e);
+            Log::failure('WP Fastest Cache purge', $e);
        }
    }

@@ -122,7 +123,7 @@ final class SuperCacheListener
                $this->purger->everything();
            }
        } catch (Throwable $e) {
-            Log::failure('WP Super Cache trailing purge', $e);
+            Log::failure('WP Fastest Cache trailing purge', $e);
        }
    }

@@ -0,0 +1,194 @@
+<?php
+
+declare(strict_types=1);
+
+namespace LIT\MCP\Integrations\FastestCache;
+
+use Closure;
+use LIT\MCP\Compatibility\ThrowawayPost;
+use LIT\MCP\Log;
+use WP_Post;
+
+defined('ABSPATH') || exit;
+
+/**
+ * Purge probe of the WP Fastest Cache check: a marked throwaway page gets a cache file where WPFC keeps the cache of
+ * that page (cache/all/<path of its address>/index.html, WPFC's own getWpContentDir), WpFastestCache::
+ * singleDeleteCache – the method behind wpfc_clear_post_cache_by_id, which FastestCacheListener calls – runs for it,
+ * and the file must be gone (WPFC moves the directory to cache/tmpWpfc, which it empties itself). The probe also
+ * checks that WPFC still hooks wpfc_clear_post_cache_by_id to that method: without the hook the public function does
+ * nothing, silently. The page and the cache directory are always removed (ThrowawayPost); entries a dead check left
+ * behind are deleted by removeOrphans(). The whole-cache purge (wpfc_clear_all_cache) is not probed: it would empty
+ * the live cache of the site on every check. Runs only from the check route (Compatibility::check).
+ *
+ * The purge is narrowed to the page ($to_clear_parents = false; otherwise WPFC also empties the home page, author
+ * page, sitemap, neighbours and term archives). NOT avoidable: WPFC still empties the two feed caches and purges the
+ * external caches configured in WPFC (Varnish, Cloudflare) on every call; creating and deleting the page fire the
+ * hooks of every other plugin (Divi 5 empties caches on insert and delete of a page).
+ *
+ * The page stays a draft; WPFC takes the address a draft would have once published. The draft gets a fixed slug
+ * straight in the database, without hooks: an empty slug would make its address the home page.
+ *
+ * shortcut: needs a pretty permalink structure (a "?page_id=" address has no cache directory, nothing to probe then).
+ */
+final class FastestCacheProbe
+{
+    private const SLUG_PREFIX = 'lit-mcp-check-';
+    private const PURGE_HOOK = 'wpfc_clear_post_cache_by_id';
+
+    private const ABORTED = 'Fastest-Cache-Probe abgebrochen (Details im PHP-Error-Log).';
+    private const NOT_HOOKED = 'WP Fastest Cache verarbeitet wpfc_clear_post_cache_by_id nicht mehr; das Leeren eines '
+        . 'Beitrags bliebe wirkungslos.';
+    private const NOT_PURGED = 'Die Testdatei im Cache blieb nach dem Leeren durch WP Fastest Cache bestehen.';
+    private const NO_SLUG = 'Die Adresse der Testseite konnte nicht gesetzt werden (Details im PHP-Error-Log).';
+    private const NOT_WRITTEN = 'Die Testdatei konnte nicht im Cache-Verzeichnis angelegt werden '
+        . '(Details im PHP-Error-Log).';
+
+    private Closure $enabled;
+    private Closure $hooked;
+    private Closure $cacheDir;
+    private Closure $purge;
+    private Closure $setSlug;
+
+    /**
+     * Defaults are the real WPFC and WordPress calls; closures only for tests.
+     *
+     * @param (Closure(): bool)|null         $enabled  WPFC caching switched on.
+     * @param (Closure(): bool)|null         $hooked   WPFC hooks wpfc_clear_post_cache_by_id to singleDeleteCache.
+     * @param (Closure(int): ?string)|null   $cacheDir Cache directory (with trailing slash) of a page; null = none.
+     * @param (Closure(int): void)|null      $purge    singleDeleteCache for this page only.
+     * @param (Closure(int): bool)|null      $setSlug  Sets the probe slug without hooks; false = not changed.
+     */
+    public function __construct(
+        ?Closure $enabled = null,
+        ?Closure $hooked = null,
+        ?Closure $cacheDir = null,
+        ?Closure $purge = null,
+        ?Closure $setSlug = null
+    ) {
+        $this->enabled = $enabled ?? FastestCacheCompatibility::cacheEnabled(...);
+        $this->hooked = $hooked ?? static fn (): bool
+            => has_action(self::PURGE_HOOK, [$GLOBALS['wp_fastest_cache'] ?? null, 'singleDeleteCache']) !== false;
+        $this->cacheDir = $cacheDir ?? self::cacheDirFor(...);
+        $this->purge = $purge ?? static function (int $id): void {
+            $GLOBALS['wp_fastest_cache']->singleDeleteCache(false, $id, false);
+        };
+        $this->setSlug = $setSlug ?? self::writeSlug(...);
+    }
+
+    /** @return list<string>|null German problems, [] = green; null = nothing to probe (cache off, no usable path). */
+    public function run(): ?array
+    {
+        if (! ($this->enabled)()) {
+            return null;
+        }
+        if (! ($this->hooked)()) {
+            return [self::NOT_HOOKED];
+        }
+
+        $unchecked = false;
+        $problems = self::throwaway()->run('page', function (int $id) use (&$unchecked): array {
+            if (! ($this->setSlug)($id)) {
+                Log::line('wpfc probe: the database did not set the slug of page ' . $id);
+
+                return [self::NO_SLUG];
+            }
+            $dir = ($this->cacheDir)($id);
+            if ($dir === null) {
+                $unchecked = true;
+
+                return [];
+            }
+
+            return $this->exercise($id, $dir);
+        });
+
+        return $unchecked && $problems === [] ? null : $problems;
+    }
+
+    /** @return list<int> IDs of probe pages a dead check left behind, deleted now. */
+    public static function removeOrphans(): array
+    {
+        return self::throwaway()->removeOrphans('page');
+    }
+
+    private static function throwaway(): ThrowawayPost
+    {
+        return new ThrowawayPost(
+            ThrowawayPost::MARKER,
+            ThrowawayPost::TITLE,
+            self::ABORTED,
+            'Die Probe-Seite konnte nicht angelegt werden (Details im PHP-Error-Log).',
+            'Die Probe-Seite %d konnte nicht gelöscht werden; bitte endgültig löschen (Titel „'
+                . ThrowawayPost::TITLE . ' …“).',
+            'wpfc probe'
+        );
+    }
+
+    /**
+     * WPFC's cache directory of the probe page, computed the way singleDeleteCache does (the path of the published
+     * address), or null when it is not exactly <path>/<probe slug>/: a plain "?page_id=" address, a path with "..".
+     */
+    public static function cacheDirFor(int $postId): ?string
+    {
+        $post = get_post($postId);
+        if (! $post instanceof WP_Post) {
+            return null;
+        }
+        $published = clone $post;
+        $published->post_status = 'publish';
+        $address = urldecode((string) get_permalink($published));
+        if (preg_match('#^https?://[^/]+/(.+)$#', $address, $match) !== 1) {
+            return null;
+        }
+        $path = trim($match[1], '/');
+        $slug = self::SLUG_PREFIX . $postId;
+        if (str_contains($path, '..') || ($path !== $slug && ! str_ends_with($path, '/' . $slug))) {
+            return null;
+        }
+
+        return $GLOBALS['wp_fastest_cache']->getWpContentDir('/cache/all/') . $path . '/';
+    }
+
+    // The probe's own file in WPFC's own cache directory, written the way WPFC does it (plain PHP, no WP_Filesystem).
+    // phpcs:disable WordPress.WP.AlternativeFunctions
+
+    /** @return list<string> */
+    private function exercise(int $id, string $dir): array
+    {
+        $file = $dir . 'index.html';
+        try {
+            if (! wp_mkdir_p($dir) || file_put_contents($file, '<!-- lit-mcp purge probe -->') === false) {
+                Log::line('wpfc probe: could not write the test file ' . $file);
+
+                return [self::NOT_WRITTEN];
+            }
+
+            ($this->purge)($id);
+            clearstatcache(true, $file);
+            if (! file_exists($file)) {
+                return [];
+            }
+
+            Log::line('wpfc probe: singleDeleteCache left the test file ' . $file . ' in place.');
+
+            return [self::NOT_PURGED];
+        } finally {
+            @unlink($file);
+            @rmdir($dir);
+        }
+    }
+
+    // phpcs:enable WordPress.WP.AlternativeFunctions
+
+    /** A fixed slug (an empty one would make the page's address the home page) – no hooks, no clean_post_cache. */
+    private static function writeSlug(int $id): bool
+    {
+        global $wpdb;
+
+        $rows = $wpdb->update($wpdb->posts, ['post_name' => self::SLUG_PREFIX . $id], ['ID' => $id]);
+        wp_cache_delete($id, 'posts');
+
+        return $rows !== false && (int) $rows > 0;
+    }
+}
@@ -2,7 +2,7 @@

 declare(strict_types=1);

-namespace LIT\MCP\Integrations\SuperCache;
+namespace LIT\MCP\Integrations\FastestCache;

 use Closure;
 use LIT\MCP\Log;
@@ -10,15 +10,15 @@ use LIT\MCP\Log;
 defined('ABSPATH') || exit;

 /**
- * The two purges of WP Super Cache, shared by SuperCacheListener (after every write) and lit/cache-clear: the
+ * The two purges of WP Fastest Cache, shared by FastestCacheListener (after every write) and lit/cache-clear: the
 * capability check, the 30 s throttle of the whole-cache purge with its one trailing purge (TRAILING_HOOK) and the
 * stamp (PURGED_AT). The state lives in the transient and the cron event, so any number of instances share it.
 */
-final class SuperCachePurger
+final class FastestCachePurger
 {
-    public const TRAILING_HOOK = 'lit_mcp_wpsc_trailing_purge';
+    public const TRAILING_HOOK = 'lit_mcp_wpfc_trailing_purge';
    /** Transient with the time of the last whole-cache purge (also in Uninstaller). */
-    public const PURGED_AT = 'lit_mcp_wpsc_purged_at';
+    public const PURGED_AT = 'lit_mcp_wpfc_purged_at';
    /** Seconds between two whole-cache purges. */
    private const THROTTLE = 30;

@@ -33,12 +33,12 @@ final class SuperCachePurger
    private bool $warned = false;

    /**
-     * Defaults are the real WPSC functions; closures only for tests.
+     * Defaults are the real WPFC functions; closures only for tests.
     *
-     * @param Closure(SuperCacheFeature): bool $usable       Compatibility::usable().
-     * @param (Closure(): bool)|null            $cacheEnabled WPSC caching switched on ($cache_enabled).
-     * @param (Closure(int): void)|null         $purgePost    wp_cache_post_edit($postId).
-     * @param (Closure(int): void)|null         $purgeAll     wp_cache_clear_cache($blogId), 0 = all sites.
+     * @param Closure(FastestCacheFeature): bool $usable       Compatibility::usable().
+     * @param (Closure(): bool)|null            $cacheEnabled WPFC caching switched on.
+     * @param (Closure(int): void)|null         $purgePost    wpfc_clear_post_cache_by_id($postId).
+     * @param (Closure(): void)|null            $purgeAll     wpfc_clear_all_cache().
     */
    public function __construct(
        Closure $usable,
@@ -47,12 +47,12 @@ final class SuperCachePurger
        ?Closure $purgeAll = null
    ) {
        $this->usable = $usable;
-        $this->cacheEnabled = $cacheEnabled ?? static fn (): bool => ! empty($GLOBALS['cache_enabled']);
+        $this->cacheEnabled = $cacheEnabled ?? FastestCacheCompatibility::cacheEnabled(...);
        $this->purgePost = $purgePost ?? static function (int $id): void {
-            wp_cache_post_edit($id);
+            wpfc_clear_post_cache_by_id($id);
        };
-        $this->purgeAll = $purgeAll ?? static function (int $blog): void {
-            wp_cache_clear_cache($blog);
+        $this->purgeAll = $purgeAll ?? static function (): void {
+            wpfc_clear_all_cache();
        };
    }

@@ -80,10 +80,10 @@ final class SuperCachePurger
        return is_numeric($last) ? (int) $last : null;
    }

-    /** wp_cache_post_edit for one post; false = locked. Never throttled. */
+    /** wpfc_clear_post_cache_by_id for one post; false = locked. Never throttled. */
    public function post(int $postId): bool
    {
-        if (! $this->allowed(SuperCacheFeature::PurgePost)) {
+        if (! $this->allowed(FastestCacheFeature::PurgePost)) {
            return false;
        }
        ($this->purgePost)($postId);
@@ -93,13 +93,13 @@ final class SuperCachePurger

    /**
     * Whole cache, at most every THROTTLE seconds. Inside the lock time one trailing purge is scheduled (cron events
-     * are per site: the callback runs on this blog, no blog switch, wp_cache_clear_cache takes the blog ID).
+     * are per site: the callback runs on this blog).
     *
     * @return self::PURGED|self::THROTTLED|self::LOCKED
     */
    public function everything(): string
    {
-        if (! $this->allowed(SuperCacheFeature::PurgeAll)) {
+        if (! $this->allowed(FastestCacheFeature::PurgeAll)) {
            return self::LOCKED;
        }

@@ -112,22 +112,20 @@ final class SuperCachePurger
            return self::THROTTLED;
        }

-        // Known and unavoidable on a multisite: WPSC also empties the shared blogs/ meta directory of all sites
-        // in its blog branch (wp-cache-phase2.php, wp_cache_clear_cache).
-        ($this->purgeAll)(is_multisite() ? get_current_blog_id() : 0);
+        ($this->purgeAll)();
        set_transient(self::PURGED_AT, time(), self::THROTTLE);

        return self::PURGED;
    }

-    private function allowed(SuperCacheFeature $feature): bool
+    private function allowed(FastestCacheFeature $feature): bool
    {
        if (($this->usable)($feature)) {
            return true;
        }
        if (! $this->warned) {
            $this->warned = true;
-            Log::line(sprintf('WP Super Cache not purged: %s not usable (see tab Compatibility)', $feature->id()));
+            Log::line(sprintf('WP Fastest Cache not purged: %s not usable (see tab Compatibility)', $feature->id()));
        }

        return false;
@@ -1,63 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace LIT\MCP\Integrations\SuperCache;
-
-use LIT\MCP\Compatibility\Call;
-use LIT\MCP\Compatibility\ConstantRequirement;
-use LIT\MCP\Compatibility\GlobalRequirement;
-use LIT\MCP\Compatibility\Manifest;
-use LIT\MCP\Compatibility\Profile;
-use LIT\MCP\Compatibility\Tier;
-
-defined('ABSPATH') || exit;
-
-/**
- * WP Super Cache as a compatibility profile: the two purge functions SuperCacheListener calls, checked against
- * 3.1.5 (wp-cache-phase2.php). wp_cache_post_edit is no documented API: if a release drops it, only the purge is
- * locked (visible in the tab and in lit-site-status). Both functions read the global $cache_path, which wp-cache.php
- * sets on load from wp-cache-config.php or its sample; wp_cache_post_edit also reads $blog_cache_dir
- * (wp-cache-base.php). The check adds a purge probe (SuperCacheProbe).
- */
-final class SuperCacheCompatibility
-{
-    public const LABEL = 'WP Super Cache';
-
-    public static function profile(): Profile
-    {
-        $all = SuperCacheFeature::cases();
-
-        return new Profile(
-            id: 'wpsc',
-            label: self::LABEL,
-            tier: Tier::LockOnFailure,
-            capabilities: $all,
-            manifests: [new Manifest(
-                'WP Super Cache',
-                calls: [
-                    new Call('wp_cache_post_edit', 1, [SuperCacheFeature::PurgePost]),
-                    new Call('wp_cache_clear_cache', 1, [SuperCacheFeature::PurgeAll]),
-                ],
-                constants: [new ConstantRequirement('WPCACHEHOME', $all)],
-                globals: [
-                    new GlobalRequirement('cache_path', $all),
-                    new GlobalRequirement('blog_cache_dir', [SuperCacheFeature::PurgePost]),
-                ]
-            )],
-            active: static fn (): bool => defined('WPCACHEHOME'),
-            version: static function (): ?string {
-                if (! defined('WPCACHEHOME')) {
-                    return null;
-                }
-                // WPSC_VERSION_ID is a build counter, not the plugin version: read the plugin header.
-                $version = get_file_data(WPCACHEHOME . 'wp-cache.php', ['Version' => 'Version'])['Version'] ?? '';
-
-                return $version === '' ? null : $version;
-            },
-            testedVersions: ['3.1.5'],
-            extraSteps: SuperCacheCheckSteps::extra(static fn (): ?array => (new SuperCacheProbe())->run()),
-            stepLabel: SuperCacheCheckSteps::label(...)
-        );
-    }
-}
@@ -1,230 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace LIT\MCP\Integrations\SuperCache;
-
-use Closure;
-use LIT\MCP\Compatibility\ThrowawayPost;
-use LIT\MCP\Log;
-use Throwable;
-
-defined('ABSPATH') || exit;
-
-/**
- * Purge probe of the WP Super Cache check: a marked throwaway page gets a cache file at the exact place WP Super
- * Cache keeps the cache of that page (its own path logic), wp_cache_post_edit() – what SuperCacheListener calls –
- * runs, and the file must be gone (renamed to ".needs-rebuild" counts as gone: that is how WPSC marks it). The
- * file, its directory and the page are always removed (ThrowawayPost). Entries a dead check left behind are
- * deleted by removeOrphans(). The whole-cache purge (wp_cache_clear_cache) is not probed: it would empty the live
- * cache of the site on every check. Runs only from the check route (Compatibility::check).
- *
- * The purge of the live site is narrowed for the call: $wp_cache_clear_on_post_edit is 0 (otherwise WPSC empties
- * the whole cache) and the filter wpsc_delete_related_pages_on_edit returns false (otherwise wp_cache_post_change
- * clears the home page and page/ as well); both are put back exactly, also when WPSC throws. What WPSC still does
- * for a page then: it empties the cache directory of that page (wp_cache_post_id_gc, $all = false: no page/, no
- * home page), deletes the legacy wp-cache meta files of that page and any unreadable legacy meta file of this site
- * (stray files, unusable anyway), fires the action gc_cache ("prune"/"rebuild" with the page's address – other
- * plugins hooking it, e.g. preloaders, see the probe page) and, for each public taxonomy term of the page,
- * wpsc_delete_post_archives() clears the term archive's cache. A fresh page has no terms unless another plugin
- * gives pages a default term; then that one archive loses its cache file on every check.
- *
- * NOT avoidable: creating, changing and deleting the page are real WordPress calls, and other plugins react to them
- * like to any editor's page. Divi 5 (Loop module, LoopHooks → et_core_clear_wp_cache → wp_cache_clear_cache) empties
- * the whole WPSC cache on every insert and delete of a page – seen on the DDEV site, so on a Divi site every check
- * empties the live cache regardless of what the probe does itself.
- *
- * The page is a draft; wp_cache_post_edit skips drafts, so for the call it is a private page – its status is set
- * straight in the database, without hooks: WPSC itself hooks clean_post_cache/edit_post to wp_cache_post_edit and
- * remembers the last post per request, so a real status change would use up the call before the probe makes it.
- *
- * The cache directory is WPSC's own (get_current_url_supercache_dir), which takes the host from the request. It is
- * used only when it is exactly <home host directory>/<probe slug>/; any other host (www or not) makes the probe
- * "not checked" instead of looking in the wrong place.
- *
- * shortcut: needs a pretty permalink structure with WP in the home address' directory (WPSC does not purge a "?p="
- * address either, nothing to probe then).
- */
-final class SuperCacheProbe
-{
-    private const SLUG_PREFIX = 'lit-mcp-check-';
-    private const CLEAR_ON_EDIT = 'wp_cache_clear_on_post_edit';
-    private const RELATED_PAGES_FILTER = 'wpsc_delete_related_pages_on_edit';
-    /** Files WPSC writes per page and protocol, and what a purge renames them to. */
-    private const CACHE_FILES = ['index.html', 'index-https.html'];
-    private const REBUILD_SUFFIX = '.needs-rebuild';
-
-    private const ABORTED = 'Super-Cache-Probe abgebrochen (Details im PHP-Error-Log).';
-    private const NOT_PURGED = 'Die Testdatei im Cache blieb nach dem Leeren durch WP Super Cache bestehen.';
-    private const NOT_PRIVATE = 'Der Status der Testseite konnte nicht gesetzt werden (Details im PHP-Error-Log).';
-    private const NOT_WRITTEN = 'Die Testdatei konnte nicht im Cache-Verzeichnis angelegt werden '
-        . '(Details im PHP-Error-Log).';
-
-    private Closure $enabled;
-    private Closure $cacheDir;
-    private Closure $purge;
-    private Closure $setStatus;
-
-    /**
-     * Defaults are the real WPSC and WordPress calls; closures only for tests.
-     *
-     * @param (Closure(): bool)|null          $enabled   WPSC caching switched on ($cache_enabled).
-     * @param (Closure(int): ?string)|null    $cacheDir  Cache directory (with trailing slash) of a page; null = none.
-     * @param (Closure(int): void)|null       $purge     wp_cache_post_edit($postId).
-     * @param (Closure(int, string): bool)|null $setStatus Sets status (and the slug) of the page without hooks;
-     *     false = the database did not change it.
-     */
-    public function __construct(
-        ?Closure $enabled = null,
-        ?Closure $cacheDir = null,
-        ?Closure $purge = null,
-        ?Closure $setStatus = null
-    ) {
-        $this->enabled = $enabled ?? static fn (): bool => ! empty($GLOBALS['cache_enabled']);
-        $this->cacheDir = $cacheDir ?? self::cacheDirFor(...);
-        $this->purge = $purge ?? self::purgeThisPageOnly(...);
-        $this->setStatus = $setStatus ?? self::writeStatus(...);
-    }
-
-    /** @return list<string>|null German problems, [] = green; null = nothing to probe (cache off, no usable path). */
-    public function run(): ?array
-    {
-        if (! ($this->enabled)()) {
-            return null;
-        }
-
-        $unchecked = false;
-        $problems = self::throwaway()->run('page', function (int $id) use (&$unchecked): array {
-            try {
-                if (! ($this->setStatus)($id, 'private')) {
-                    Log::line('wpsc probe: the database did not set page ' . $id . ' to private.');
-
-                    return [self::NOT_PRIVATE];
-                }
-                $dir = ($this->cacheDir)($id);
-                if ($dir === null) {
-                    $unchecked = true;
-
-                    return [];
-                }
-
-                return $this->exercise($id, $dir);
-            } finally {
-                $this->resetToDraft($id);
-            }
-        });
-
-        return $unchecked && $problems === [] ? null : $problems;
-    }
-
-    /** @return list<int> IDs of probe pages a dead check left behind (draft or private), deleted now. */
-    public static function removeOrphans(): array
-    {
-        return self::throwaway()->removeOrphans('page');
-    }
-
-    private static function throwaway(): ThrowawayPost
-    {
-        return new ThrowawayPost(
-            ThrowawayPost::MARKER,
-            ThrowawayPost::TITLE,
-            self::ABORTED,
-            'Die Probe-Seite konnte nicht angelegt werden (Details im PHP-Error-Log).',
-            'Die Probe-Seite %d konnte nicht gelöscht werden; bitte endgültig löschen (Titel „'
-                . ThrowawayPost::TITLE . ' …“).',
-            'wpsc probe'
-        );
-    }
-
-    /** Must not hide the result of the probe or end the check: the page is deleted right after anyway. */
-    private function resetToDraft(int $id): void
-    {
-        try {
-            if (! ($this->setStatus)($id, 'draft')) {
-                Log::line('wpsc probe: the database did not set page ' . $id . ' back to draft.');
-            }
-        } catch (Throwable $e) {
-            Log::failure('wpsc probe', $e);
-        }
-    }
-
-    /**
-     * WPSC's own cache directory of the probe page, or null when the probe must not use it: anything but exactly
-     * <home host directory>/<probe slug>/ – another host than the home URL's (WPSC takes it from the request), a
-     * plain "?p=" address or an empty slug (both resolve to the home page's directory), a path with "..".
-     */
-    public static function cacheDirFor(int $postId): ?string
-    {
-        $home = (string) get_supercache_dir();
-        $dir = (string) get_current_url_supercache_dir($postId);
-
-        return $home !== '' && $dir === $home . self::SLUG_PREFIX . $postId . '/' ? $dir : null;
-    }
-
-    /** wp_cache_post_edit for the probe page only: see the class comment. Global and filter are put back exactly. */
-    private static function purgeThisPageOnly(int $id): void
-    {
-        $hadGlobal = array_key_exists(self::CLEAR_ON_EDIT, $GLOBALS);
-        $before = $GLOBALS[self::CLEAR_ON_EDIT] ?? null;
-        // A closure of its own: remove_filter must not take away a "__return_false" another plugin added.
-        $off = static fn (): bool => false;
-        try {
-            $GLOBALS[self::CLEAR_ON_EDIT] = 0;
-            add_filter(self::RELATED_PAGES_FILTER, $off, PHP_INT_MAX);
-            wp_cache_post_edit($id);
-        } finally {
-            remove_filter(self::RELATED_PAGES_FILTER, $off, PHP_INT_MAX);
-            if ($hadGlobal) {
-                $GLOBALS[self::CLEAR_ON_EDIT] = $before;
-            } else {
-                unset($GLOBALS[self::CLEAR_ON_EDIT]);
-            }
-        }
-    }
-
-    // The probe's own file in WPSC's own cache directory, written the way WPSC does it (plain PHP, no WP_Filesystem).
-    // phpcs:disable WordPress.WP.AlternativeFunctions
-
-    /** @return list<string> */
-    private function exercise(int $id, string $dir): array
-    {
-        $file = $dir . 'index.html';
-        try {
-            if (! wp_mkdir_p($dir) || file_put_contents($file, '<!-- lit-mcp purge probe -->') === false) {
-                Log::line('wpsc probe: could not write the test file ' . $file);
-
-                return [self::NOT_WRITTEN];
-            }
-
-            ($this->purge)($id);
-            clearstatcache(true, $file);
-            if (! file_exists($file)) {
-                return [];
-            }
-
-            Log::line('wpsc probe: wp_cache_post_edit left the test file ' . $file . ' in place.');
-
-            return [self::NOT_PURGED];
-        } finally {
-            foreach (self::CACHE_FILES as $name) {
-                @unlink($dir . $name);
-                @unlink($dir . $name . self::REBUILD_SUFFIX);
-            }
-            @rmdir($dir);
-        }
-    }
-
-    // phpcs:enable WordPress.WP.AlternativeFunctions
-
-    /** Status and a fixed slug (an empty one would make the page's address the home page) – no hooks, no clean_post_cache. */
-    private static function writeStatus(int $id, string $status): bool
-    {
-        global $wpdb;
-
-        $columns = ['post_status' => $status, 'post_name' => self::SLUG_PREFIX . $id];
-        $rows = $wpdb->update($wpdb->posts, $columns, ['ID' => $id]);
-        wp_cache_delete($id, 'posts');
-
-        return $rows !== false && (int) $rows > 0;
-    }
-}
@@ -37,10 +37,10 @@ use LIT\MCP\Integrations\Pods\PodsCompatibility;
 use LIT\MCP\Integrations\Pods\PodsFeature;
 use LIT\MCP\Integrations\Pods\PodsFieldSource;
 use LIT\MCP\Integrations\Pods\PodsIntegration;
-use LIT\MCP\Integrations\SuperCache\SuperCacheFeature;
-use LIT\MCP\Integrations\SuperCache\SuperCacheIntegration;
-use LIT\MCP\Integrations\SuperCache\SuperCachePurger;
-use LIT\MCP\Integrations\SuperCache\SuperCacheListener;
+use LIT\MCP\Integrations\FastestCache\FastestCacheFeature;
+use LIT\MCP\Integrations\FastestCache\FastestCacheIntegration;
+use LIT\MCP\Integrations\FastestCache\FastestCachePurger;
+use LIT\MCP\Integrations\FastestCache\FastestCacheListener;
 use LIT\MCP\Integrations\WordPress\Schema\ContentSchema;
 use LIT\MCP\Integrations\WordPress\Schema\FieldSource;
 use LIT\MCP\Integrations\WordPress\Schema\RegisteredMetaSource;
@@ -100,8 +100,8 @@ final class Plugin
        // Integration-owned hooks (Divi: upgrader hook, check route, CLI command, tab "Divi") – before the settings
        // page reads its tabs.
        $registry->boot();
-        // After every write of the plugin: empty the WP Super Cache where WordPress itself would not.
-        SuperCacheListener::create($registry->compatibility())->register();
+        // After every write of the plugin: empty the WP Fastest Cache where WordPress itself would not.
+        FastestCacheListener::create($registry->compatibility())->register();
        // The admin check of every compatibility profile (POST lit-mcp/v1/<id>-check), REST like the MCP calls.
        (new CheckRoute($registry->compatibility()))->register();

@@ -216,11 +216,11 @@ final class Plugin
            $divi->library(),
            $divi->themeBuilder(),
            new PodsIntegration(),
-            new SuperCacheIntegration(
+            new FastestCacheIntegration(
                null,
                // Asked at call time: the compatibility exists only once the registry does.
-                new SuperCachePurger(
-                    static function (SuperCacheFeature $feature) use (&$registry): bool {
+                new FastestCachePurger(
+                    static function (FastestCacheFeature $feature) use (&$registry): bool {
                        return $registry instanceof IntegrationRegistry && $registry->compatibility()->usable($feature);
                    }
                ),
@@ -19,11 +19,11 @@ defined('ABSPATH') || exit;
 * Limits::OPTION, ChangeLog\ChangeLogInstaller::VERSION_OPTION, Integrations\Divi\Release\
 * lit_mcp_<profile>_releases (Compatibility\ReleaseStore), lit_mcp_<profile>_check_report
 * (Compatibility\CheckReportStore) and lit_mcp_<profile>_check_lock (Admin\CheckRoute) for the
- * profiles divi, pods and wpsc (an explicit list: a LIKE pattern could hit foreign options),
+ * profiles divi, pods and wpfc (an explicit list: a LIKE pattern could hit foreign options),
 * Integrations\Divi\Design\DesignLock::option(), Admin\ConnectionStatus::ENDPOINT_TRANSIENT,
 * Integrations\Divi\Release\ReleaseResolver::CACHE,
- * Integrations\SuperCache\SuperCacheListener::PURGED_AT (transient),
- * ChangeLog\ChangeLogCleanup::HOOK, Integrations\SuperCache\SuperCacheListener::TRAILING_HOOK (cron),
+ * Integrations\FastestCache\FastestCacheListener::PURGED_AT (transient),
+ * ChangeLog\ChangeLogCleanup::HOOK, Integrations\FastestCache\FastestCacheListener::TRAILING_HOOK (cron),
 * ChangeLog\ChangeLog::TABLE, Admin\LogTab::PER_PAGE_OPTION and
 * Updater\RecheckOnInstall::OPTION on purpose;
 * tests/Unit/UninstallerTest.php and tests/Unit/UninstallTest.php keep them in sync with
@@ -40,7 +40,7 @@ final class Uninstaller
        'lit_mcp_allowed_roles', 'lit_mcp_exposure', 'lit_mcp_limits', 'lit_mcp_db_version',
        'lit_mcp_divi_releases', 'lit_mcp_divi_check_report', 'lit_mcp_divi_check_lock',
        'lit_mcp_pods_releases', 'lit_mcp_pods_check_report', 'lit_mcp_pods_check_lock',
-        'lit_mcp_wpsc_releases', 'lit_mcp_wpsc_check_report', 'lit_mcp_wpsc_check_lock',
+        'lit_mcp_wpfc_releases', 'lit_mcp_wpfc_check_report', 'lit_mcp_wpfc_check_lock',
        'lit_mcp_snapshots_colors', 'lit_mcp_snapshots_variables', 'lit_mcp_snapshots_presets',
        'lit_mcp_snapshots_theme_options', 'lit_mcp_snapshots_custom_css',
        'lit_mcp_lock_divi_options', 'lit_mcp_lock_variables', 'lit_mcp_lock_presets', 'lit_mcp_lock_custom_css',
@@ -48,8 +48,8 @@ final class Uninstaller
        'lit_mcp_lock_colors', 'lit_mcp_lock_theme_options',
        'lit_mcp_installed_version',
    ];
-    private const TRANSIENTS = ['lit_mcp_endpoint_check', 'lit_mcp_divi_state', 'lit_mcp_wpsc_purged_at'];
-    private const CRON_HOOKS = ['lit_mcp_log_cleanup', 'lit_mcp_wpsc_trailing_purge'];
+    private const TRANSIENTS = ['lit_mcp_endpoint_check', 'lit_mcp_divi_state', 'lit_mcp_wpfc_purged_at'];
+    private const CRON_HOOKS = ['lit_mcp_log_cleanup', 'lit_mcp_wpfc_trailing_purge'];
    private const TABLE = 'lit_mcp_log';

    /** Screen option "Einträge pro Seite" of the Protokoll tab (Admin\LogTab::PER_PAGE_OPTION): user meta. */
@@ -1,56 +1,38 @@
 #!/usr/bin/env bash
-# End-to-end checks of the WP Super Cache profile of the compatibility layer (plan 2026-11-06-kompatibilitaetsschicht,
-# 2.5 and 2.6): status, check route /wpsc-check with the purge probe (cache off and on), the purge after a write of
-# this plugin without wp_update_post (terms), the whole-cache purge after a setting, its throttle and the trailing
-# purge by cron. Runs INSIDE the DDEV web container:
-#   cd /home/janniclas/Projekte/WordPress && timeout 600 ddev exec bash wp-content/plugins/WP-LIT-MCP/tests/Integration/super-cache-smoke.sh
+# End-to-end checks of the WP Fastest Cache profile of the compatibility layer: status, check route /wpfc-check with
+# the purge probe (cache off and on), the purge after a write of this plugin without wp_update_post (terms), the
+# whole-cache purge after a setting, its throttle, the trailing purge by cron and lit/cache-clear. Runs INSIDE the
+# DDEV web container:
+#   cd /home/janniclas/Projekte/WordPress && timeout 600 ddev exec bash wp-content/plugins/WP-LIT-MCP/tests/Integration/fastest-cache-smoke.sh
 #
-# SIDE EFFECTS, all undone by the EXIT trap and proven at the end (verify_restored): activating WP Super Cache edits
-# wp-config.php (WP_CACHE, WPCACHEHOME), creates wp-content/advanced-cache.php and wp-content/wp-cache-config.php,
-# fills wp-content/cache/ and schedules wp_cache_* cron events and options. The script saves wp-config.php (and the
-# files named in SAVED_FILES, if they exist) first, deactivates the plugin and writes the saved state back, byte for byte (sha256).
-# It uses the plain PHP cache mode ($wp_cache_mod_rewrite = 0): no .htaccess rewrite rules are ever written; the run
-# refuses to start if the cache directory is not empty, WP Super Cache is already active or WP_CACHE is already set.
+# SIDE EFFECTS, all undone by the EXIT trap and proven at the end (verify_restored): WP Fastest Cache is activated if
+# it was not, its option WpFastestCache is switched (only wpFastestCacheStatus, nothing that writes .htaccess) and set
+# back byte for byte, a test post and two categories are created and deleted. Cache files of the site are emptied by
+# the whole-cache purges – that is what the run checks; WPFC rebuilds them on the next requests.
 set -euo pipefail
 cd /var/www/html
 # shellcheck source=lib.sh
 source wp-content/plugins/WP-LIT-MCP/tests/Integration/lib.sh

 ROOT=/var/www/html
-CACHE_DIR=$ROOT/wp-content/cache
-SUPERCACHE_DIR=$CACHE_DIR/supercache
-WP_CONFIG=$ROOT/wp-config.php
+CACHE_ALL=$ROOT/wp-content/cache/all
 HTACCESS=$ROOT/.htaccess
-SAVED_FILES=(wp-content/advanced-cache.php wp-content/wp-cache-config.php .htaccess)
-CRON_PATTERN='wp_cache|wpsc|lit_mcp_wpsc'
-OPTION_PATTERN='wpsc|wp_super_cache|wp_cache|super_cache|lit_mcp_wpsc'
-TRAILING_HOOK=lit_mcp_wpsc_trailing_purge
-PURGED_AT=lit_mcp_wpsc_purged_at
+CRON_PATTERN='lit_mcp_wpfc'
+OPTION_PATTERN='lit_mcp_wpfc'
+TRAILING_HOOK=lit_mcp_wpfc_trailing_purge
+PURGED_AT=lit_mcp_wpfc_purged_at
 BASE=http://localhost
+CACHE_ON='{"wpFastestCacheStatus":"on"}'

 ADMIN_LOGIN=$(wp user list --role=administrator --field=user_login | head -1)
 PREFIX=$(wp db prefix)

-# --- Guards: nothing is changed before all of them pass ------------------------------------------------------------
-wp plugin is-active wp-super-cache 2>/dev/null && fail "WP Super Cache is already active; this smoke expects it inactive"
-grep -Eq "^\s*(define\s*\(\s*['\"]WP_CACHE['\"]|const\s+WP_CACHE\s*=)" "$WP_CONFIG" && fail "wp-config.php already sets WP_CACHE"
-[ -d "$CACHE_DIR" ] && [ -n "$(find "$CACHE_DIR" -mindepth 1 -print -quit)" ] && fail "$CACHE_DIR is not empty; refusing to touch a cache"
-
-# --- Snapshot of everything the run can change ---------------------------------------------------------------------
-BACKUP=$(mktemp -d)
+# --- Guards and snapshot of everything the run can change ----------------------------------------------------------
+wp plugin is-installed wp-fastest-cache || fail "WP Fastest Cache is not installed"
 sums() { sha256sum "$@" 2>/dev/null | awk '{print $1}'; }
-CONFIG_SUM_BEFORE=$(sums "$WP_CONFIG")
-CONFIG_STAT_BEFORE=$(stat -c '%a %U:%G' "$WP_CONFIG")
-# cp -a, not -p: wp-config.php carries an ACL entry; WP Super Cache replaces the file (new inode) and loses it, and
-# only cp -a writes it back with the content.
-cp -a "$WP_CONFIG" "$BACKUP/wp-config.php"
-[ "$(sums "$BACKUP/wp-config.php")" = "$CONFIG_SUM_BEFORE" ] || fail "could not save wp-config.php"
-for f in "${SAVED_FILES[@]}"; do
-  if [ -e "$ROOT/$f" ]; then cp -a "$ROOT/$f" "$BACKUP/$(basename "$f")"; echo "$(sums "$ROOT/$f")" > "$BACKUP/$(basename "$f").sum"; fi
-done
+WPFC_WAS_ACTIVE=no; wp plugin is-active wp-fastest-cache 2>/dev/null && WPFC_WAS_ACTIVE=yes
+WPFC_OPTION_BEFORE=$(wp option get WpFastestCache 2>/dev/null || echo __absent__)
 HTACCESS_BEFORE=absent; [ -e "$HTACCESS" ] && HTACCESS_BEFORE=$(sums "$HTACCESS")
-CACHE_DIR_EXISTED=no; CACHE_DIR_MODE=775
-if [ -d "$CACHE_DIR" ]; then CACHE_DIR_EXISTED=yes; CACHE_DIR_MODE=$(stat -c '%a' "$CACHE_DIR"); fi
 list_hooks() { wp cron event list --fields=hook --format=csv | tail -n +2 | grep -E "$CRON_PATTERN" | sort -u || true; }
 list_options() { wp db query "SELECT option_name FROM ${PREFIX}options WHERE option_name REGEXP '$OPTION_PATTERN' ORDER BY option_name" --skip-column-names; }
 HOOKS_BEFORE=$(list_hooks)
@@ -60,41 +42,20 @@ ORIGINAL_DESCRIPTION=$(wp option get blogdescription)
 CREATED_POSTS=()
 CREATED_TERMS=()

-# --- Restore ---------------------------------------------------------------------------------------------------------
-# A saved file is written back atomically: a copy next to the target (same file system), then mv – a run killed in
-# the middle never leaves a half-written wp-config.php.
-restore_file() { # $1 = path relative to ROOT
-  local name tmp; name=$(basename "$1")
-  if [ -e "$BACKUP/$name" ]; then
-    tmp=$(mktemp "$ROOT/$(dirname "$1")/.$name.restore.XXXXXX") \
-      && cp -a "$BACKUP/$name" "$tmp" && mv -f "$tmp" "$ROOT/$1" || { rm -f "$tmp"; return 1; }
-  else
-    rm -f "$ROOT/$1"
-  fi
-}
-
 restore() {
  set +e
  local id term hook option
  for id in "${CREATED_POSTS[@]}"; do wp post delete "$id" --force >/dev/null 2>&1; done
  for term in "${CREATED_TERMS[@]}"; do wp term delete category "$term" >/dev/null 2>&1; done
  wp option update blogdescription "$ORIGINAL_DESCRIPTION" >/dev/null 2>&1
-  wp option delete lit_mcp_wpsc_check_report lit_mcp_wpsc_releases lit_mcp_wpsc_check_lock >/dev/null 2>&1
  wp transient delete "$PURGED_AT" >/dev/null 2>&1
  cleanup_app_passwords_for "$ADMIN_LOGIN"
-  # Deactivation lets WP Super Cache undo its own edits (WP_CACHE, WPCACHEHOME, advanced-cache.php, cache files) ...
-  wp plugin is-active wp-super-cache >/dev/null 2>&1 && wp plugin deactivate wp-super-cache >/dev/null 2>&1
-  # ... and what it leaves, or does differently, is set back from the saved state.
-  restore_file wp-config.php
-  for id in "${SAVED_FILES[@]}"; do restore_file "$id"; done
-  [ -d "$CACHE_DIR" ] && find "$CACHE_DIR" -mindepth 1 -delete
-  if [ "$CACHE_DIR_EXISTED" = no ]; then
-    rmdir "$CACHE_DIR" 2>/dev/null
+  if [ "$WPFC_OPTION_BEFORE" = __absent__ ]; then
+    wp option delete WpFastestCache >/dev/null 2>&1
  else
-    # Deactivation removes the whole cache directory; mkdir -m keeps the inherited ACL of its parent.
-    [ -d "$CACHE_DIR" ] || mkdir -m "$CACHE_DIR_MODE" "$CACHE_DIR"
+    wp option update WpFastestCache "$WPFC_OPTION_BEFORE" >/dev/null 2>&1
  fi
-  # The profile's cron event and every option or event the plugin added.
+  [ "$WPFC_WAS_ACTIVE" = no ] && wp plugin deactivate wp-fastest-cache >/dev/null 2>&1
  for hook in $(list_hooks); do
    grep -qx "$hook" <<<"$HOOKS_BEFORE" || wp cron event delete "$hook" >/dev/null 2>&1
  done
@@ -106,30 +67,11 @@ restore() {

 # Prints the proof; returns non-zero on any difference (used in the trap, so it must not exit).
 verify_restored() {
-  local ok=0 name after
-  after=$(sums "$WP_CONFIG")
-  if [ "$after" = "$CONFIG_SUM_BEFORE" ]; then pass "restored: wp-config.php sha256 $CONFIG_SUM_BEFORE (before) == $after (after)"
-  else echo "FAIL: wp-config.php sha256 $CONFIG_SUM_BEFORE (before) != $after (after)"; ok=1; fi
-  [ "$(stat -c '%a %U:%G' "$WP_CONFIG")" = "$CONFIG_STAT_BEFORE" ] \
-    || { echo "FAIL: wp-config.php mode/owner changed: $CONFIG_STAT_BEFORE -> $(stat -c '%a %U:%G' "$WP_CONFIG")"; ok=1; }
-  for f in "${SAVED_FILES[@]}"; do
-    name=$(basename "$f")
-    if [ -e "$BACKUP/$name" ]; then
-      [ "$(sums "$ROOT/$f")" = "$(cat "$BACKUP/$name.sum")" ] || { echo "FAIL: $f differs from the saved one"; ok=1; }
-    else
-      [ ! -e "$ROOT/$f" ] || { echo "FAIL: $f was absent before and exists now"; ok=1; }
-    fi
-  done
-  [ "$ok" = 0 ] && pass "restored: advanced-cache.php and wp-cache-config.php as before (absent: $([ -e "$BACKUP/advanced-cache.php" ] && echo no || echo yes))"
-  local htaccess_after=absent; [ -e "$HTACCESS" ] && htaccess_after=$(sums "$HTACCESS")
+  local ok=0 htaccess_after=absent
+  [ "$(wp option get WpFastestCache 2>/dev/null || echo __absent__)" = "$WPFC_OPTION_BEFORE" ] \
+    || { echo "FAIL: option WpFastestCache differs"; ok=1; }
+  [ -e "$HTACCESS" ] && htaccess_after=$(sums "$HTACCESS")
  [ "$htaccess_after" = "$HTACCESS_BEFORE" ] || { echo "FAIL: .htaccess changed ($HTACCESS_BEFORE -> $htaccess_after)"; ok=1; }
-  if [ "$CACHE_DIR_EXISTED" = yes ]; then
-    [ -d "$CACHE_DIR" ] && [ -z "$(find "$CACHE_DIR" -mindepth 1 -print -quit)" ] && [ "$(stat -c '%a' "$CACHE_DIR")" = "$CACHE_DIR_MODE" ] \
-      || { echo "FAIL: cache directory not empty, gone or its mode changed"; ok=1; }
-  else
-    [ ! -e "$CACHE_DIR" ] || { echo "FAIL: cache directory was absent before and exists now"; ok=1; }
-  fi
-  wp plugin is-active wp-super-cache 2>/dev/null && { echo "FAIL: WP Super Cache is still active"; ok=1; }
  [ "$(wp option get active_plugins --format=json)" = "$ACTIVE_PLUGINS_BEFORE" ] || { echo "FAIL: active_plugins differs"; ok=1; }
  [ "$(list_hooks)" = "$HOOKS_BEFORE" ] || { echo "FAIL: cron events differ: $(list_hooks | tr '\n' ' ')"; ok=1; }
  [ "$(list_options)" = "$OPTIONS_BEFORE" ] || { echo "FAIL: options differ: $(list_options | tr '\n' ' ')"; ok=1; }
@@ -137,8 +79,9 @@ verify_restored() {
  [ "$(wp option get blogdescription)" = "$ORIGINAL_DESCRIPTION" ] || { echo "FAIL: blogdescription not restored"; ok=1; }
  [ "$(wp post list --post_type=any --post_status=any --meta_key=_lit_mcp_check_entry --format=count)" = 0 ] \
    || { echo "FAIL: a probe page is left"; ok=1; }
-  [ "$(wp post list --post_type=post --post_status=any --name=lit-wpsc-smoke --format=count)" = 0 ] \
+  [ "$(wp post list --post_type=post --post_status=any --name=lit-wpfc-smoke --format=count)" = 0 ] \
    || { echo "FAIL: the test post is left"; ok=1; }
+  [ "$ok" = 0 ] && pass "restored: WP Fastest Cache active=$WPFC_WAS_ACTIVE with its option as before, .htaccess untouched"
  return "$ok"
 }

@@ -146,7 +89,6 @@ on_exit() {
  local rc=$1
  restore
  verify_restored || rc=1
-  rm -rf "$BACKUP"
  guard_exit "$rc" || exit $?
  exit "$rc"
 }
@@ -154,11 +96,11 @@ trap 'on_exit $?' EXIT
 trap 'exit 130' INT TERM HUP

 # --- Helpers ---------------------------------------------------------------------------------------------------------
-wpsc_component() { tool lit-site-status '{}' | jq -c '.components[] | select(.id == "wpsc")'; }
+wpfc_component() { tool lit-site-status '{}' | jq -c '.components[] | select(.id == "wpfc")'; }
 stored_option() { wp option get "$1" --format=json 2>/dev/null || true; }
 event_count() { wp cron event list --hook="$TRAILING_HOOK" --format=count 2>/dev/null || echo 0; }
-# The cache file of the test post as WP Super Cache keeps it (index.html; a ".needs-rebuild" copy is a purged one).
-cache_file() { find "$SUPERCACHE_DIR" -type f -path '*lit-wpsc-smoke*' -name index.html 2>/dev/null | head -1; }
+# The cache file of the test post where WP Fastest Cache keeps it (a purge moves the directory to cache/tmpWpfc).
+cache_file() { local f="$CACHE_ALL${POST_PATH%/}/index.html"; [ -f "$f" ] && echo "$f" || true; }
 wait_for() { # $1 = description, rest = command; polls up to 15 s
  local what=$1 i; shift
  for i in $(seq 1 15); do "$@" && return 0; sleep 1; done
@@ -166,97 +108,78 @@ wait_for() { # $1 = description, rest = command; polls up to 15 s
 }
 cache_file_exists() { [ -n "$(cache_file)" ]; }
 cache_file_gone() { [ -z "$(cache_file)" ]; }
-front_page_by_wpsc() { [[ "$(curl -s -H "Host: $HOST" "$BASE/")" == *WP-Super-Cache* ]]; }
-# One public request for the test post; the cache file appears at the end of the request.
 fetch_post() {
  local code
  code=$(curl -s -o /dev/null -w '%{http_code}' -H "Host: $HOST" "$BASE$POST_PATH")
  [ "$code" = 200 ] || fail "GET $POST_PATH answered $code"
 }
-# Requests the test post until WP Super Cache has written its file (the first request after a purge or a new post
-# is not always the one that is stored).
+# Requests the test post until WP Fastest Cache has written its file.
 fill_cache() {
  local i
  for i in $(seq 1 10); do
    fetch_post
-    sleep 1
    cache_file_exists && return 0
+    sleep 1
  done
-  echo "--- response of $POST_PATH (selected headers) and the cache tree:"
-  curl -s -i -H "Host: $HOST" "$BASE$POST_PATH" | grep -iE '^(HTTP|cache-control|set-cookie)|WP Super Cache|Page not cached' | head -10
-  find "$CACHE_DIR" | head -20
+  echo "--- end of the response of $POST_PATH and the cache tree:"
+  curl -s -H "Host: $HOST" "$BASE$POST_PATH" | tail -c 300
+  find "$CACHE_ALL" -maxdepth 4 | head -20
  fail "timeout: cache file of the test post"
 }
-config_value() { grep -E "^\s*\\\$$1\s*=" "$ROOT/wp-content/wp-cache-config.php" | head -1; }

-# --- 0. Activate and look at what WP Super Cache did ------------------------------------------------------------------
-wp plugin activate wp-super-cache >/dev/null 2>&1 || fail "could not activate WP Super Cache"
-grep -q "define( *'WP_CACHE', *true *)" "$WP_CONFIG" || fail "activation did not set WP_CACHE (the run cannot cache)"
-[ -e "$ROOT/wp-content/advanced-cache.php" ] || fail "activation did not create advanced-cache.php"
-# WP Super Cache keys its files by the host of the request: MCP calls must carry the host the page was cached under.
-MCP_HOST=$HOST
+# --- 0. Active, cache switched off -----------------------------------------------------------------------------------
+[ "$WPFC_WAS_ACTIVE" = yes ] || wp plugin activate wp-fastest-cache >/dev/null 2>&1 || fail "could not activate WP Fastest Cache"
+wp option update WpFastestCache '{}' >/dev/null
 connect "$ADMIN_LOGIN"

 # 1. Status
-wpsc_component | jq -e '.active == true and .version == "3.1.5" and .problems == []' >/dev/null \
-  || fail "site status must show WP Super Cache 3.1.5 active without problems: $(wpsc_component)"
-pass "lit-site-status: WP Super Cache 3.1.5 active, no problems"
+wpfc_component | jq -e '.active == true and .version == "1.5.5" and .problems == []' >/dev/null \
+  || fail "site status must show WP Fastest Cache 1.5.5 active without problems: $(wpfc_component)"
+pass "lit-site-status: WP Fastest Cache 1.5.5 active, no problems"

-# 2. Check route with the cache still switched off: the probe step is green and says "not checked"
+# 2. Check route with the cache switched off: the probe step is green and says "not checked"
 APP_PASSWORD=$(wp user application-password create "$ADMIN_LOGIN" lit-mcp-integration-test --porcelain)
 run_check() {
  local headers
-  headers=$(curl -s -o /dev/null -D - -X POST -H "Host: $HOST" -H 'X-Forwarded-Proto: https' -u "$ADMIN_LOGIN:$APP_PASSWORD" "$BASE/wp-json/lit-mcp/v1/wpsc-check")
+  headers=$(curl -s -o /dev/null -D - -X POST -H "Host: $HOST" -H 'X-Forwarded-Proto: https' -u "$ADMIN_LOGIN:$APP_PASSWORD" "$BASE/wp-json/lit-mcp/v1/wpfc-check")
  echo "$headers" | grep -qi '^HTTP/[0-9.]* 303' || fail "check route must answer 303: $headers"
  echo "$headers" | grep -qi '^location:.*tab=compatibility.*lit_mcp_notice=compat_checked' || fail "redirect to the tab: $headers"
 }
-[ "$(wp eval 'echo (int) ! empty($GLOBALS["cache_enabled"]);')" = 0 ] || fail "the cache must be off after activation"
 run_check
-REPORT=$(stored_option lit_mcp_wpsc_check_report)
+REPORT=$(stored_option lit_mcp_wpfc_check_report)
 echo "$REPORT" | jq -e '(.steps | length) == 2 and all(.steps[]; .problems == [] and .skipped == false)
  and ([.steps[] | select(.key == "probe")] | length == 1 and (.[0].label | contains("Cache ist ausgeschaltet, nicht geprüft")))' >/dev/null \
  || fail "cache off: the report must be green and the probe must say it did not check: $REPORT"
-pass "/wpsc-check with the cache off: green, probe step says 'Cache ist ausgeschaltet, nicht geprüft'"
+pass "/wpfc-check with the cache off: green, probe step says 'Cache ist ausgeschaltet, nicht geprüft'"

-# 3. Switch the cache on in the plain PHP mode (no mod_rewrite, no .htaccess)
-wp eval 'wp_cache_enable();' >/dev/null 2>&1 || fail "wp_cache_enable failed"
-# PHP-FPM's opcache re-reads a changed wp-cache-config.php at most every 2 s: wait until a public request is served
-# by WP Super Cache (its HTML comment), the state the checks below need.
-wait_for "WP Super Cache serves public requests" front_page_by_wpsc
-config_value cache_enabled | grep -q 'true' || fail "wp-cache-config.php: cache_enabled is not true: $(config_value cache_enabled)"
-config_value wp_cache_mod_rewrite | grep -Eq '= *0;' || fail "mod_rewrite mode is on: $(config_value wp_cache_mod_rewrite)"
-config_value super_cache_enabled | grep -q 'true' || fail "super_cache_enabled is not true: $(config_value super_cache_enabled)"
-[ "$(config_value wp_cache_clear_on_post_edit | grep -Ec '= *0;')" = 1 ] || fail "clear_on_post_edit must be 0: $(config_value wp_cache_clear_on_post_edit)"
-[ ! -e "$HTACCESS" ] || [ "$(sums "$HTACCESS")" = "$HTACCESS_BEFORE" ] || fail ".htaccess changed"
-pass "cache on in the plain PHP mode (mod_rewrite 0, clear_on_post_edit 0), .htaccess untouched"
-
-# 4. Check route with the cache on: the purge probe really runs
+# 3. Cache on; the check route runs the real purge probe
+wp option update WpFastestCache "$CACHE_ON" >/dev/null
 run_check
-REPORT=$(stored_option lit_mcp_wpsc_check_report)
+REPORT=$(stored_option lit_mcp_wpfc_check_report)
 echo "$REPORT" | jq -e '(.steps | length) == 2 and all(.steps[]; .problems == [] and .skipped == false)
  and ([.steps[] | select(.key == "probe")] | length == 1 and (.[0].label | contains("nicht geprüft") | not))
-  and .version == "3.1.5"' >/dev/null || fail "cache on: the report must be green with a real probe step: $REPORT"
-[ -z "$(stored_option lit_mcp_wpsc_check_lock)" ] || fail "the check lock must be released"
+  and .version == "1.5.5"' >/dev/null || fail "cache on: the report must be green with a real probe step: $REPORT"
+[ -z "$(stored_option lit_mcp_wpfc_check_lock)" ] || fail "the check lock must be released"
 [ "$(wp post list --post_type=any --post_status=any --meta_key=_lit_mcp_check_entry --format=count)" = 0 ] || fail "the probe left a page behind"
-[ "$(find "$SUPERCACHE_DIR" -path '*lit-mcp-check-*' -print -quit 2>/dev/null)" = "" ] || fail "the probe left a cache directory behind"
-UNAUTH=$(curl -s -o /dev/null -w '%{http_code}' -X POST -H "Host: $HOST" -H 'X-Forwarded-Proto: https' "$BASE/wp-json/lit-mcp/v1/wpsc-check")
+[ "$(find "$CACHE_ALL" -maxdepth 3 -path '*lit-mcp-check-*' -print -quit 2>/dev/null)" = "" ] || fail "the probe left a cache directory behind"
+UNAUTH=$(curl -s -o /dev/null -w '%{http_code}' -X POST -H "Host: $HOST" -H 'X-Forwarded-Proto: https' "$BASE/wp-json/lit-mcp/v1/wpfc-check")
 [ "$UNAUTH" = 401 ] || [ "$UNAUTH" = 403 ] || fail "anonymous check must be refused, got $UNAUTH"
-pass "/wpsc-check with the cache on: green with the purge probe, no page or cache directory left, anonymous refused"
+pass "/wpfc-check with the cache on: green with the purge probe, no page or cache directory left, anonymous refused"

-# 5. A published test post, fetched until it is in the cache
-CAT_A=$(wp term create category "LIT WPSC Smoke A" --porcelain); CREATED_TERMS+=("$CAT_A")
-CAT_B=$(wp term create category "LIT WPSC Smoke B" --porcelain); CREATED_TERMS+=("$CAT_B")
-POST_ID=$(wp post create --post_type=post --post_status=publish --post_title="LIT WPSC Smoke" --post_name=lit-wpsc-smoke \
-  --post_content="Testbeitrag fuer den Super-Cache-Smoke." --porcelain)
+# 4. A published test post, fetched until it is in the cache
+CAT_A=$(wp term create category "LIT WPFC Smoke A" --porcelain); CREATED_TERMS+=("$CAT_A")
+CAT_B=$(wp term create category "LIT WPFC Smoke B" --porcelain); CREATED_TERMS+=("$CAT_B")
+POST_ID=$(wp post create --post_type=post --post_status=publish --post_title="LIT WPFC Smoke" --post_name=lit-wpfc-smoke \
+  --post_content="Testbeitrag fuer den Fastest-Cache-Smoke." --porcelain)
 CREATED_POSTS+=("$POST_ID")
 POST_PATH=$(wp eval "echo wp_parse_url(get_permalink($POST_ID), PHP_URL_PATH);")
 fill_cache
-pass "test post $POST_ID cached: $(cache_file | sed "s#$CACHE_DIR/##")"
+pass "test post $POST_ID cached: $(cache_file | sed "s#$ROOT/##")"

-# 6. Control: a term change outside this plugin does not touch the cache (WP Super Cache never sees it) ...
+# 5. Control: a term change outside this plugin does not touch the cache (WP Fastest Cache never sees it) ...
 wp post term set "$POST_ID" category "$CAT_A" >/dev/null
 sleep 2
-cache_file_exists || fail "control: WP Super Cache itself purged on a plain term change; the next check proves nothing"
+cache_file_exists || fail "control: WP Fastest Cache itself purged on a plain term change; the next check proves nothing"
 # ... but the same kind of change through lit-content-update (no wp_update_post) empties the cache of the post.
 REV=$(tool lit-content-get "{\"post_id\":$POST_ID}" | jq -r '.rev')
 UPDATED=$(tool lit-content-update "{\"post_id\":$POST_ID,\"rev\":\"$REV\",\"terms\":{\"category\":[$CAT_B]}}")
@@ -265,10 +188,10 @@ wait_for "the cache file of the post is gone after lit-content-update" cache_fil
 [ "$(event_count)" = 0 ] || fail "a single-post purge must not schedule a trailing purge"
 pass "terms-only lit-content-update empties the cache of the post (a plain term change does not), no trailing event"

-# 7. Whole-cache purge after a setting; the second one inside 30 s is throttled and leaves exactly one cron event
+# 6. Whole-cache purge after a setting; the second one inside 30 s is throttled and leaves exactly one cron event
 fill_cache
 [ -z "$(wp transient get "$PURGED_AT" 2>/dev/null || true)" ] || fail "transient $PURGED_AT set before the first whole purge"
-ability lit/wp-settings-update '{"settings":{"blogdescription":"LIT WPSC Smoke 1"}}' | jq -e '.ok == true' >/dev/null || fail "settings update 1"
+ability lit/wp-settings-update '{"settings":{"blogdescription":"LIT WPFC Smoke 1"}}' | jq -e '.ok == true' >/dev/null || fail "settings update 1"
 wait_for "the cache is empty after a setting change" cache_file_gone
 wait_for "the purge time is stored" bash -c "[ -n \"\$(wp transient get $PURGED_AT 2>/dev/null)\" ]"
 LAST=$(wp transient get "$PURGED_AT")
@@ -276,18 +199,18 @@ LAST=$(wp transient get "$PURGED_AT")
 pass "setting change empties the whole cache (purge time stored, no trailing event)"

 fill_cache
-ability lit/wp-settings-update '{"settings":{"blogdescription":"LIT WPSC Smoke 2"}}' | jq -e '.ok == true' >/dev/null || fail "settings update 2"
+ability lit/wp-settings-update '{"settings":{"blogdescription":"LIT WPFC Smoke 2"}}' | jq -e '.ok == true' >/dev/null || fail "settings update 2"
 wait_for "one trailing purge is scheduled" bash -c "[ \"\$(wp cron event list --hook=$TRAILING_HOOK --format=count)\" = 1 ]"
 sleep 2
 cache_file_exists || fail "throttled: the second whole purge ran inside the lock time"
-ability lit/wp-settings-update '{"settings":{"blogdescription":"LIT WPSC Smoke 3"}}' | jq -e '.ok == true' >/dev/null || fail "settings update 3"
+ability lit/wp-settings-update '{"settings":{"blogdescription":"LIT WPFC Smoke 3"}}' | jq -e '.ok == true' >/dev/null || fail "settings update 3"
 sleep 3
 [ "$(event_count)" = 1 ] || fail "exactly one trailing event must stay scheduled, found $(event_count)"
 cache_file_exists || fail "throttled: the third whole purge ran inside the lock time"
 [ "$(wp transient get "$PURGED_AT")" = "$LAST" ] || fail "throttled purges must not move the purge time"
 pass "second and third whole purge inside 30 s: throttled (file stays, purge time unchanged), exactly one $TRAILING_HOOK event"

-# 8. Run the trailing purge once the lock is over: the cache is emptied and nothing is scheduled any more
+# 7. Run the trailing purge once the lock is over: the cache is emptied and nothing is scheduled any more
 WAIT=$((LAST + 32 - $(date +%s))); [ "$WAIT" -gt 0 ] && sleep "$WAIT"
 wp cron event run "$TRAILING_HOOK" >/dev/null 2>&1 || fail "wp cron event run $TRAILING_HOOK"
 cache_file_gone || fail "the trailing purge did not empty the cache"
@@ -295,7 +218,7 @@ cache_file_gone || fail "the trailing purge did not empty the cache"
 [ "$(wp transient get "$PURGED_AT")" -gt "$LAST" ] || fail "the trailing purge must store a new purge time"
 pass "trailing purge by cron: cache emptied, event gone, purge time renewed"

-# 8b. lit/cache-clear: the dry run changes nothing, confirm empties the post's page / the whole cache
+# 8. lit/cache-clear: the dry run changes nothing, confirm empties the post's page / the whole cache
 fill_cache
 for ARGS in "{\"scope\":\"post\",\"post_id\":$POST_ID}" '{"scope":"all"}'; do
  DRY=$(ability lit/cache-clear "$ARGS")
@@ -339,6 +262,6 @@ pass "lit/cache-clear scope all inside 30 s: throttled, one trailing event, cron
 # 9. Everything back as before (the EXIT trap would do it too; here it is part of the verdict)
 restore
 verify_restored || fail "the state before the run was not restored"
-pass "cleanup: plugin inactive, test post, categories, options, transient and cron events gone"
+pass "cleanup: test post, categories, options, transient and cron events gone"

 finish
@@ -6,7 +6,7 @@
 # Requires jq and curl (both present in the DDEV web image).

 # Mutual exclusion of ALL smokes (every one sources this file inside the same web container): two at once would
-# share one site state – WP Super Cache edits wp-config.php, every smoke empties the test application passwords of the
+# share one site state – WP Fastest Cache edits wp-config.php, every smoke empties the test application passwords of the
 # admin (cleanup_app_passwords_for, harmless only because of this lock), Pods/Divi release options. The lock lives as
 # long as the script (fd 9 closes with it); a smoke that runs a second one itself must not source this file twice.
 exec 9>/tmp/lit-mcp-smoke.lock
@@ -22,7 +22,7 @@ ENDPOINT=http://localhost/wp-json/mcp/mcp-oauth-server
 HOST=$(wp option get home | sed -E 's#^[a-zA-Z]+://##')

 # Optional: the Host header MCP requests carry (default: curl's own, "localhost"). A cache plugin that keys its files
-# by the request's host (WP Super Cache) needs the site's real host here (super-cache-smoke.sh sets it).
+# by the request's host (WP Fastest Cache) needs the site's real host here (none of the current smokes needs it).
 MCP_HOST=${MCP_HOST:-}

 TOKEN=""
@@ -173,11 +173,11 @@ final class CompatibilityTabTest extends TestCase
        return (string) ob_get_clean();
    }

-    /** One source for the ability name of the release and withdraw entries (SuperCacheListener reads it too). */
+    /** One source for the ability name of the release and withdraw entries (FastestCacheListener reads it too). */
    public function testTheReleaseAbilityNameHasOneSource(): void
    {
        self::assertSame('lit/divi-release', CompatibilityTab::releaseAbility('divi'));
-        self::assertTrue(CompatibilityTab::isReleaseAbility(CompatibilityTab::releaseAbility('wpsc')));
+        self::assertTrue(CompatibilityTab::isReleaseAbility(CompatibilityTab::releaseAbility('wpfc')));
        foreach (['lit/content-update', 'lit/-release', 'lit/release', 'lit/divi-releases'] as $other) {
            self::assertFalse(CompatibilityTab::isReleaseAbility($other), $other);
        }
@@ -245,7 +245,7 @@ final class ThrowawayPostTest extends TestCase
        self::assertSame([], $this->throwaway()->removeOrphans('page'));
    }

-    /** A probe killed while its page was private (WP Super Cache) leaves a private page, not a draft. */
+    /** Private entries count too (the old WP Super Cache probe passed through private). */
    public function testShortStatusListCoversAProbeKilledWhilePrivate(): void
    {
        $query = null;
@@ -2,15 +2,15 @@

 declare(strict_types=1);

-namespace LIT\MCP\Tests\Unit\Integrations\SuperCache;
+namespace LIT\MCP\Tests\Unit\Integrations\FastestCache;

 use Brain\Monkey\Functions;
 use LIT\MCP\Abilities\Ability;
 use LIT\MCP\Abilities\Annotations;
 use LIT\MCP\Abilities\DeclaresRequirements;
-use LIT\MCP\Integrations\SuperCache\CacheClearAbility;
-use LIT\MCP\Integrations\SuperCache\SuperCacheFeature;
-use LIT\MCP\Integrations\SuperCache\SuperCachePurger;
+use LIT\MCP\Integrations\FastestCache\CacheClearAbility;
+use LIT\MCP\Integrations\FastestCache\FastestCacheFeature;
+use LIT\MCP\Integrations\FastestCache\FastestCachePurger;
 use LIT\MCP\Tests\Support\FakeChangeLog;
 use LIT\MCP\Tests\Unit\TestCase;
 use WP_Error;
@@ -51,20 +51,20 @@ final class CacheClearAbilityTest extends TestCase

    protected function tearDown(): void
    {
-        unset($GLOBALS['cache_enabled']);
+        unset($GLOBALS['wp_fastest_cache_options']);
        parent::tearDown();
    }

    private function ability(?FakeChangeLog $log = null, bool $cacheOn = true, bool $usable = true): CacheClearAbility
    {
-        $purger = new SuperCachePurger(
-            static fn (SuperCacheFeature $feature): bool => $usable,
+        $purger = new FastestCachePurger(
+            static fn (FastestCacheFeature $feature): bool => $usable,
            static fn (): bool => $cacheOn,
            function (int $id): void {
                $this->purges[] = 'post:' . $id;
            },
-            function (int $blog): void {
-                $this->purges[] = 'all:' . $blog;
+            function (): void {
+                $this->purges[] = 'all';
            }
        );

@@ -80,7 +80,7 @@ final class CacheClearAbilityTest extends TestCase
        self::assertFalse($ability->isDirect());
        self::assertSame(Annotations::write(true), $ability->annotations());
        self::assertStringContainsString('confirm: true', $ability->description());
-        self::assertStringContainsString('WP Super Cache', $ability->description());
+        self::assertStringContainsString('WP Fastest Cache', $ability->description());

        $schema = $ability->inputSchema();
        self::assertSame(['scope'], $schema['required']);
@@ -95,8 +95,8 @@ final class CacheClearAbilityTest extends TestCase
        $ability = $this->ability();

        self::assertInstanceOf(DeclaresRequirements::class, $ability);
-        self::assertSame(['wpsc-purge-all'], $ability->requirements(['scope' => 'all']));
-        self::assertSame(['wpsc-purge-post'], $ability->requirements(['scope' => 'post', 'post_id' => 7]));
+        self::assertSame(['wpfc-purge-all'], $ability->requirements(['scope' => 'all']));
+        self::assertSame(['wpfc-purge-post'], $ability->requirements(['scope' => 'post', 'post_id' => 7]));
        self::assertSame([], $ability->requirements(['scope' => 'x']));
        self::assertSame([], $ability->requirements([]));
    }
@@ -165,7 +165,7 @@ final class CacheClearAbilityTest extends TestCase

    public function testTheDryRunClearsNothingAndReportsTheState(): void
    {
-        $GLOBALS['cache_enabled'] = true;
+        $GLOBALS['wp_fastest_cache_options'] = (object) ['wpFastestCacheStatus' => 'on'];
        $this->lastPurge = time() - 5;

        $payload = self::assertToolError($this->ability()->execute(['scope' => 'all']), 'confirm_required');
@@ -202,17 +202,16 @@ final class CacheClearAbilityTest extends TestCase
        self::assertTrue($result['ok']);
        self::assertSame('purged', $result['outcome']);
        self::assertSame(4, $result['log_id']);
-        $log->assertRecorded(['ability' => 'lit/cache-clear', 'object_type' => 'wpsc', 'object_id' => '7']);
+        $log->assertRecorded(['ability' => 'lit/cache-clear', 'object_type' => 'wpfc', 'object_id' => '7']);
    }

-    public function testADraftHasNothingToClear(): void
+    /** WPFC finds the address of any post (a trashed one too), so no status is skipped. */
+    public function testADraftIsClearedToo(): void
    {
-        $GLOBALS['cache_enabled'] = true;
-        $result = $this->ability()->execute(['scope' => 'post', 'post_id' => 8, 'confirm' => true]);
+        $result = $this->ability(new FakeChangeLog(2))->execute(['scope' => 'post', 'post_id' => 8, 'confirm' => true]);

-        self::assertSame([], $this->purges);
-        self::assertSame('nothing', $result['outcome']);
-        self::assertStringContainsString('Entwurf', $result['summary']);
+        self::assertSame(['post:8'], $this->purges);
+        self::assertSame('purged', $result['outcome']);
    }

    public function testConfirmClearsTheWholeCacheAtOnce(): void
@@ -221,9 +220,9 @@ final class CacheClearAbilityTest extends TestCase

        $result = $this->ability($log)->execute(['scope' => 'all', 'confirm' => true]);

-        self::assertSame(['all:0'], $this->purges);
+        self::assertSame(['all'], $this->purges);
        self::assertSame('purged', $result['outcome']);
-        $log->assertRecorded(['ability' => 'lit/cache-clear', 'object_type' => 'wpsc', 'object_id' => 'all']);
+        $log->assertRecorded(['ability' => 'lit/cache-clear', 'object_type' => 'wpfc', 'object_id' => 'all']);
    }

    public function testAWholePurgeInsideTheLockTimeIsThrottledWithATrailingPurge(): void
@@ -233,7 +232,7 @@ final class CacheClearAbilityTest extends TestCase
        $result = $this->ability(new FakeChangeLog(1))->execute(['scope' => 'all', 'confirm' => true]);

        self::assertSame([], $this->purges);
-        self::assertSame([SuperCachePurger::TRAILING_HOOK], $this->scheduled);
+        self::assertSame([FastestCachePurger::TRAILING_HOOK], $this->scheduled);
        self::assertSame('throttled', $result['outcome']);
        self::assertStringContainsString('Nachlauf', $result['summary']);
    }
@@ -271,7 +270,7 @@ final class CacheClearAbilityTest extends TestCase
        self::assertInstanceOf(WP_Error::class, $result);
        self::assertSame('lit_compat_incompatible', $result->get_error_code());
        self::assertStringContainsString(
-            'WP Super Cache ist gesperrt (siehe Reiter Kompatibilität). Es wurde nichts geleert.',
+            'WP Fastest Cache ist gesperrt (siehe Reiter Kompatibilität). Es wurde nichts geleert.',
            $result->get_error_message()
        );
        self::assertSame([], $this->purges);
@@ -2,33 +2,33 @@

 declare(strict_types=1);

-namespace LIT\MCP\Tests\Unit\Integrations\SuperCache;
+namespace LIT\MCP\Tests\Unit\Integrations\FastestCache;

 use LIT\MCP\Compatibility\CheckStep;
-use LIT\MCP\Integrations\SuperCache\SuperCacheCheckSteps;
-use LIT\MCP\Integrations\SuperCache\SuperCacheCompatibility;
+use LIT\MCP\Integrations\FastestCache\FastestCacheCheckSteps;
+use LIT\MCP\Integrations\FastestCache\FastestCacheCompatibility;
 use LIT\MCP\Tests\Unit\TestCase;

-final class SuperCacheCheckStepsTest extends TestCase
+final class FastestCacheCheckStepsTest extends TestCase
 {
    public function testTheProbeIsSkippedWithARedManifestAndNotRun(): void
    {
        $ran = false;
-        $steps = SuperCacheCheckSteps::extra(static function () use (&$ran): array {
+        $steps = FastestCacheCheckSteps::extra(static function () use (&$ran): array {
            $ran = true;

            return [];
        })(false);

        self::assertCount(1, $steps);
-        self::assertSame(SuperCacheCheckSteps::PROBE, $steps[0]->key);
+        self::assertSame(FastestCacheCheckSteps::PROBE, $steps[0]->key);
        self::assertTrue($steps[0]->skipped);
        self::assertFalse($ran);
    }

    public function testTheStepCarriesTheProbeProblems(): void
    {
-        $steps = SuperCacheCheckSteps::extra(static fn (): array => ['rot'])(true);
+        $steps = FastestCacheCheckSteps::extra(static fn (): array => ['rot'])(true);

        self::assertSame(['rot'], $steps[0]->problems);
        self::assertFalse($steps[0]->skipped);
@@ -38,7 +38,7 @@ final class SuperCacheCheckStepsTest extends TestCase
    /** A switched-off cache is no red step: a skipped one would lock the purge of a site that simply caches nothing. */
    public function testWithoutAnActiveCacheTheStepIsGreenAndSaysSo(): void
    {
-        $steps = SuperCacheCheckSteps::extra(static fn (): ?array => null)(true);
+        $steps = FastestCacheCheckSteps::extra(static fn (): ?array => null)(true);

        self::assertTrue($steps[0]->green());
        self::assertStringContainsString('Cache ist ausgeschaltet, nicht geprüft', $steps[0]->label());
@@ -46,11 +46,11 @@ final class SuperCacheCheckStepsTest extends TestCase

    public function testTheLabelOfAnOldStepComesFromTheKey(): void
    {
-        self::assertSame('Leeren-Test an einer Wegwerf-Seite im Cache', SuperCacheCheckSteps::label(new CheckStep(SuperCacheCheckSteps::PROBE, [])));
+        self::assertSame('Leeren-Test an einer Wegwerf-Seite im Cache', FastestCacheCheckSteps::label(new CheckStep(FastestCacheCheckSteps::PROBE, [])));
        self::assertSame(
-            SuperCacheCompatibility::LABEL . '-Funktionen, Klassen und Registrierungen',
-            SuperCacheCheckSteps::label(new CheckStep(CheckStep::MANIFEST, []))
+            FastestCacheCompatibility::LABEL . '-Funktionen, Klassen und Registrierungen',
+            FastestCacheCheckSteps::label(new CheckStep(CheckStep::MANIFEST, []))
        );
-        self::assertSame('other', SuperCacheCheckSteps::label(new CheckStep('other', [])));
+        self::assertSame('other', FastestCacheCheckSteps::label(new CheckStep('other', [])));
    }
 }
@@ -0,0 +1,136 @@
+<?php
+
+declare(strict_types=1);
+
+namespace LIT\MCP\Tests\Unit\Integrations\FastestCache;
+
+use Brain\Monkey\Functions;
+use LIT\MCP\Compatibility\Call;
+use LIT\MCP\Compatibility\CheckStep;
+use LIT\MCP\Compatibility\Compatibility;
+use LIT\MCP\Compatibility\Tier;
+use LIT\MCP\Integrations\Divi\Release\DiviProfile;
+use LIT\MCP\Integrations\Pods\PodsCompatibility;
+use LIT\MCP\Integrations\FastestCache\FastestCacheCheckSteps;
+use LIT\MCP\Integrations\FastestCache\FastestCacheCompatibility;
+use LIT\MCP\Integrations\FastestCache\FastestCacheFeature;
+use LIT\MCP\Tests\Unit\TestCase;
+
+final class FastestCacheCompatibilityTest extends TestCase
+{
+    public function testDescribesFastestCacheAsALockOnFailurePlugin(): void
+    {
+        $profile = FastestCacheCompatibility::profile();
+
+        self::assertSame('wpfc', $profile->id);
+        self::assertSame('WP Fastest Cache', $profile->label);
+        self::assertSame(Tier::LockOnFailure, $profile->tier);
+        self::assertSame(['1.5.5'], $profile->testedVersions);
+        self::assertNull($profile->minVersion);
+        self::assertSame(FastestCacheFeature::cases(), $profile->capabilities);
+    }
+
+    /** Argument counts are those the purger and the probe pass. */
+    public function testTheManifestHoldsTheTwoPurgeFunctionsWithTheirArgumentCounts(): void
+    {
+        $manifest = FastestCacheCompatibility::profile()->manifests[0];
+        $calls = [];
+        foreach ($manifest->calls as $call) {
+            $calls[$call->symbol] = [$call->args, $call->features()];
+        }
+
+        self::assertSame([
+            'wpfc_clear_post_cache_by_id' => [1, [FastestCacheFeature::PurgePost]],
+            'wpfc_clear_all_cache' => [0, [FastestCacheFeature::PurgeAll]],
+            'WpFastestCache::singleDeleteCache' => [3, [FastestCacheFeature::PurgePost]],
+            'WpFastestCache::getWpContentDir' => [1, [FastestCacheFeature::PurgePost]],
+        ], $calls);
+        self::assertContainsOnlyInstancesOf(Call::class, $manifest->calls);
+    }
+
+    /** The instance that hooks the purge actions and the decoded options with the cache switch. */
+    public function testTheGlobalsTheFunctionsReadAreRequired(): void
+    {
+        $manifest = FastestCacheCompatibility::profile()->manifests[0];
+
+        self::assertSame(['WPFC_MAIN_PATH'], array_map(static fn ($c) => $c->name, $manifest->constants));
+        $globals = [];
+        foreach ($manifest->globals as $global) {
+            $globals[$global->name] = $global->features();
+        }
+        self::assertSame(
+            ['wp_fastest_cache' => FastestCacheFeature::cases(), 'wp_fastest_cache_options' => FastestCacheFeature::cases()],
+            $globals
+        );
+    }
+
+    /**
+     * @runInSeparateProcess
+     * @preserveGlobalState disabled
+     */
+    public function testActiveAndVersionFollowTheMainPathConstantAndThePluginHeader(): void
+    {
+        $profile = FastestCacheCompatibility::profile();
+        self::assertFalse(($profile->active)());
+        self::assertNull(($profile->version)());
+
+        define('WPFC_MAIN_PATH', '/plugins/wp-fastest-cache/');
+        Functions\expect('get_file_data')
+            ->once()
+            ->with('/plugins/wp-fastest-cache/wpFastestCache.php', ['Version' => 'Version'])
+            ->andReturn(['Version' => '1.5.5']);
+
+        self::assertTrue(($profile->active)());
+        self::assertSame('1.5.5', ($profile->version)());
+    }
+
+    /**
+     * @runInSeparateProcess
+     * @preserveGlobalState disabled
+     */
+    public function testAnUnreadableHeaderIsAnUnknownVersion(): void
+    {
+        define('WPFC_MAIN_PATH', '/plugins/wp-fastest-cache/');
+        Functions\when('get_file_data')->justReturn(['Version' => '']);
+
+        self::assertNull((FastestCacheCompatibility::profile()->version)());
+    }
+
+    public function testTheCheckHasTheProbeAsExtraStep(): void
+    {
+        $profile = FastestCacheCompatibility::profile();
+
+        self::assertNotNull($profile->extraSteps);
+        $steps = ($profile->extraSteps)(false);
+        self::assertSame([FastestCacheCheckSteps::PROBE], array_map(static fn ($step): string => $step->key, $steps));
+        self::assertTrue($steps[0]->skipped);
+        self::assertNotNull($profile->stepLabel);
+        self::assertSame(
+            'Leeren-Test an einer Wegwerf-Seite im Cache',
+            ($profile->stepLabel)(new CheckStep(FastestCacheCheckSteps::PROBE, []))
+        );
+    }
+
+    public function testTheCacheIsOnlyEnabledWhileTheSwitchInTheDecodedOptionsIsOn(): void
+    {
+        unset($GLOBALS['wp_fastest_cache_options']);
+        self::assertFalse(FastestCacheCompatibility::cacheEnabled());
+        $GLOBALS['wp_fastest_cache_options'] = [];
+        self::assertFalse(FastestCacheCompatibility::cacheEnabled(), 'WPFC stores [] when the option is missing');
+        $GLOBALS['wp_fastest_cache_options'] = (object) ['wpFastestCacheMinifyHtml' => 'on'];
+        self::assertFalse(FastestCacheCompatibility::cacheEnabled());
+        $GLOBALS['wp_fastest_cache_options'] = (object) ['wpFastestCacheStatus' => 'on'];
+        self::assertTrue(FastestCacheCompatibility::cacheEnabled());
+        unset($GLOBALS['wp_fastest_cache_options']);
+    }
+
+    public function testAllProfilesCoexistWithoutIdCollision(): void
+    {
+        $compatibility = new Compatibility(
+            [DiviProfile::profile(), PodsCompatibility::profile(), FastestCacheCompatibility::profile()]
+        );
+
+        self::assertSame(['divi', 'pods', 'wpfc'], array_map(static fn ($p) => $p->id, $compatibility->profiles()));
+        self::assertSame(FastestCacheFeature::PurgeAll, $compatibility->capability('wpfc-purge-all'));
+    }
+}
@@ -2,25 +2,25 @@

 declare(strict_types=1);

-namespace LIT\MCP\Tests\Unit\Integrations\SuperCache;
+namespace LIT\MCP\Tests\Unit\Integrations\FastestCache;

 use LIT\MCP\Compatibility\Capability;
-use LIT\MCP\Integrations\SuperCache\SuperCacheFeature;
+use LIT\MCP\Integrations\FastestCache\FastestCacheFeature;
 use LIT\MCP\Tests\Unit\TestCase;

-final class SuperCacheFeatureTest extends TestCase
+final class FastestCacheFeatureTest extends TestCase
 {
    public function testEveryFeatureIsAWritingCapabilityWithAPrefixedId(): void
    {
-        foreach (SuperCacheFeature::cases() as $feature) {
+        foreach (FastestCacheFeature::cases() as $feature) {
            self::assertInstanceOf(Capability::class, $feature);
            self::assertSame($feature->value, $feature->id());
            self::assertNotSame('', $feature->label());
            self::assertTrue($feature->isWrite());
        }
        self::assertSame(
-            ['wpsc-purge-post', 'wpsc-purge-all'],
-            array_map(static fn (SuperCacheFeature $f): string => $f->id(), SuperCacheFeature::cases())
+            ['wpfc-purge-post', 'wpfc-purge-all'],
+            array_map(static fn (FastestCacheFeature $f): string => $f->id(), FastestCacheFeature::cases())
        );
    }
 }
@@ -0,0 +1,86 @@
+<?php
+
+declare(strict_types=1);
+
+namespace LIT\MCP\Tests\Unit\Integrations\FastestCache;
+
+use Brain\Monkey\Functions;
+use LIT\MCP\Admin\CompatibilityTab;
+use LIT\MCP\Compatibility\ProvidesCompatibility;
+use LIT\MCP\Integrations\Bootable;
+use LIT\MCP\Integrations\Integration;
+use LIT\MCP\Integrations\FastestCache\FastestCacheCompatibility;
+use LIT\MCP\Integrations\FastestCache\FastestCacheIntegration;
+use LIT\MCP\Integrations\FastestCache\FastestCachePurger;
+use LIT\MCP\Tests\Support\FakeChangeLog;
+use LIT\MCP\Tests\Unit\TestCase;
+
+final class FastestCacheIntegrationTest extends TestCase
+{
+    private static function purger(): FastestCachePurger
+    {
+        return new FastestCachePurger(static fn (): bool => true);
+    }
+
+    public function testIsAnIntegrationThatProvidesItsProfileAndTheCacheClearTool(): void
+    {
+        $integration = new FastestCacheIntegration(null, self::purger(), FakeChangeLog::forbidden());
+
+        self::assertInstanceOf(Integration::class, $integration);
+        self::assertInstanceOf(ProvidesCompatibility::class, $integration);
+        self::assertSame('wpfc', $integration->id());
+        self::assertSame('WP Fastest Cache', $integration->label());
+        self::assertEquals(['lit/cache-clear'], array_map(static fn ($a): string => $a->name(), $integration->abilities()));
+        self::assertEquals([FastestCacheCompatibility::profile()], $integration->compatibilities());
+    }
+
+    /**
+     * The same constant the profile's active() reads: WP Fastest Cache defines it when its plugin file loads.
+     *
+     * @runInSeparateProcess
+     * @preserveGlobalState disabled
+     */
+    public function testIsAvailableOnlyWithFastestCache(): void
+    {
+        $integration = new FastestCacheIntegration(null, self::purger(), FakeChangeLog::forbidden());
+        self::assertFalse($integration->isAvailable());
+
+        define('WPFC_MAIN_PATH', '/plugins/wp-fastest-cache/');
+        self::assertTrue($integration->isAvailable());
+        self::assertTrue((FastestCacheCompatibility::profile()->active)());
+    }
+
+    public function testBootHooksTheOrphanCleanupIntoTheProfileLoad(): void
+    {
+        $integration = new FastestCacheIntegration(null, self::purger(), FakeChangeLog::forbidden());
+        $integration->boot();
+
+        self::assertInstanceOf(Bootable::class, $integration);
+        self::assertNotFalse(has_action(CompatibilityTab::LOAD_ACTION, [$integration, 'removeOrphans']));
+    }
+
+    public function testNoCleanupForAnotherProfileWithoutWpscOrWithoutTheCapability(): void
+    {
+        Functions\expect('get_posts')->never();
+        Functions\when('current_user_can')->justReturn(true);
+        (new FastestCacheIntegration(static fn (): bool => true, self::purger(), FakeChangeLog::forbidden()))->removeOrphans('pods');
+        (new FastestCacheIntegration(static fn (): bool => false, self::purger(), FakeChangeLog::forbidden()))->removeOrphans('wpfc');
+
+        Functions\when('current_user_can')->justReturn(false);
+        (new FastestCacheIntegration(static fn (): bool => true, self::purger(), FakeChangeLog::forbidden()))->removeOrphans('wpfc');
+        $this->addToAssertionCount(1);
+    }
+
+    public function testCleansUpPagesForTheAdministratorWithWpsc(): void
+    {
+        Functions\when('current_user_can')->justReturn(true);
+        Functions\expect('get_posts')->once()->andReturnUsing(static function (array $args): array {
+            self::assertSame('page', $args['post_type']);
+            self::assertSame(['draft', 'private'], $args['post_status']);
+
+            return [];
+        });
+
+        (new FastestCacheIntegration(static fn (): bool => true, self::purger(), FakeChangeLog::forbidden()))->removeOrphans('wpfc');
+    }
+}
@@ -2,19 +2,19 @@

 declare(strict_types=1);

-namespace LIT\MCP\Tests\Unit\Integrations\SuperCache;
+namespace LIT\MCP\Tests\Unit\Integrations\FastestCache;

 use Brain\Monkey\Functions;
 use Closure;
 use LIT\MCP\Admin\CompatibilityTab;
 use LIT\MCP\Compatibility\Compatibility;
-use LIT\MCP\Integrations\SuperCache\SuperCacheCompatibility;
-use LIT\MCP\Integrations\SuperCache\SuperCacheFeature;
-use LIT\MCP\Integrations\SuperCache\SuperCacheListener;
+use LIT\MCP\Integrations\FastestCache\FastestCacheCompatibility;
+use LIT\MCP\Integrations\FastestCache\FastestCacheFeature;
+use LIT\MCP\Integrations\FastestCache\FastestCacheListener;
 use LIT\MCP\Tests\Unit\TestCase;
 use WP_Post;

-final class SuperCacheListenerTest extends TestCase
+final class FastestCacheListenerTest extends TestCase
 {
    /** @var list<string> */
    private array $purges = [];
@@ -56,7 +56,7 @@ final class SuperCacheListenerTest extends TestCase
    {
        ini_set('error_log', (string) $this->previousErrorLog);
        unlink($this->errorLog);
-        unset($GLOBALS['cache_enabled']);
+        unset($GLOBALS['wp_fastest_cache_options']);
        parent::tearDown();
    }

@@ -66,17 +66,17 @@ final class SuperCacheListenerTest extends TestCase
        bool $usablePost = true,
        bool $usableAll = true,
        ?Closure $postIdFor = null
-    ): SuperCacheListener {
-        return new SuperCacheListener(
-            static fn (SuperCacheFeature $feature): bool => $feature === SuperCacheFeature::PurgePost
+    ): FastestCacheListener {
+        return new FastestCacheListener(
+            static fn (FastestCacheFeature $feature): bool => $feature === FastestCacheFeature::PurgePost
                ? $usablePost
                : $usableAll,
            static fn (): bool => $cacheOn,
            function (int $id): void {
                $this->purges[] = 'post:' . $id;
            },
-            function (int $blog): void {
-                $this->purges[] = 'all:' . $blog;
+            function (): void {
+                $this->purges[] = 'all';
            },
            $postIdFor ?? static fn (string $type, string $id): ?int => in_array($type, ['page', 'post'], true)
                ? (int) $id
@@ -120,7 +120,7 @@ final class SuperCacheListenerTest extends TestCase
        $listener->onChange('lit/content-update', 'post', '14', 7);
        $listener->flush();

-        self::assertSame(['all:0'], $this->purges);
+        self::assertSame(['all'], $this->purges);
    }

    public function testThePurgeIsDoneOncePerFlush(): void
@@ -143,7 +143,7 @@ final class SuperCacheListenerTest extends TestCase
        $listener->flush();
        $listener->onChange('lit/content-update', 'page', '14', 7);
        $listener->flush();
-        self::assertSame(['all:0', 'post:14'], $this->purges);
+        self::assertSame(['all', 'post:14'], $this->purges);
    }

    /** @dataProvider siteWideChanges */
@@ -153,7 +153,7 @@ final class SuperCacheListenerTest extends TestCase
        $listener->onChange($ability, $type, $id, null);
        $listener->flush();

-        self::assertSame(['all:0'], $this->purges);
+        self::assertSame(['all'], $this->purges);
    }

    /** @return array<string, array{string, string, string}> */
@@ -175,7 +175,7 @@ final class SuperCacheListenerTest extends TestCase
        $listener->onChange('lit/post-trash', 'post', '99', 1);
        $listener->flush();

-        self::assertSame(['all:0'], $this->purges);
+        self::assertSame(['all'], $this->purges);
    }

    /** One whole-cache change among single posts: still one purge, no single ones on top. */
@@ -186,7 +186,7 @@ final class SuperCacheListenerTest extends TestCase
        $listener->onChange('lit/wp-settings-update', 'option', 'a', 2);
        $listener->flush();

-        self::assertSame(['all:0'], $this->purges);
+        self::assertSame(['all'], $this->purges);
    }

    /** Release and withdraw entries of the check workflow change nothing on the site (shared ability name). */
@@ -204,8 +204,8 @@ final class SuperCacheListenerTest extends TestCase
    public function testTheCacheClearToolsOwnEntriesPurgeNothing(): void
    {
        $listener = $this->listener();
-        $listener->onChange('lit/cache-clear', 'wpsc', 'all', 1);
-        $listener->onChange('lit/cache-clear', 'wpsc', '12', 2);
+        $listener->onChange('lit/cache-clear', 'wpfc', 'all', 1);
+        $listener->onChange('lit/cache-clear', 'wpfc', '12', 2);
        $listener->flush();

        self::assertSame([], $this->purges);
@@ -233,7 +233,7 @@ final class SuperCacheListenerTest extends TestCase
        $listener->flush();

        self::assertSame([], $this->purges);
-        self::assertSame(1, substr_count($this->logged(), 'wpsc-purge-post'));
+        self::assertSame(1, substr_count($this->logged(), 'wpfc-purge-post'));
    }

    /** The capabilities lock separately: a gone purge-post does not stop the whole-cache purge. */
@@ -244,7 +244,7 @@ final class SuperCacheListenerTest extends TestCase
        $listener->onChange('lit/wp-settings-update', 'option', 'blogname', 1);
        $listener->flush();

-        self::assertSame(['all:0'], $this->purges);
+        self::assertSame(['all'], $this->purges);
    }

    public function testALockedWholeCachePurgeSchedulesNothing(): void
@@ -258,18 +258,6 @@ final class SuperCacheListenerTest extends TestCase
        self::assertSame([], $this->scheduled);
    }

-    public function testOnAMultisiteTheCurrentBlogIsPurged(): void
-    {
-        Functions\when('is_multisite')->justReturn(true);
-        Functions\when('get_current_blog_id')->justReturn(3);
-
-        $listener = $this->listener();
-        $listener->onChange('lit/wp-settings-update', 'option', 'blogname', 1);
-        $listener->flush();
-
-        self::assertSame(['all:3'], $this->purges);
-    }
-
    public function testAWholeCachePurgeStampsTheTimeForThirtySeconds(): void
    {
        $listener = $this->listener();
@@ -277,7 +265,7 @@ final class SuperCacheListenerTest extends TestCase
        $listener->flush();

        self::assertCount(1, $this->stamped);
-        self::assertSame('lit_mcp_wpsc_purged_at', $this->stamped[0][0]);
+        self::assertSame('lit_mcp_wpfc_purged_at', $this->stamped[0][0]);
        self::assertEqualsWithDelta(time(), $this->stamped[0][1], 2);
        self::assertSame(30, $this->stamped[0][2]);
    }
@@ -305,7 +293,7 @@ final class SuperCacheListenerTest extends TestCase

        self::assertSame([], $this->purges);
        self::assertSame([], $this->stamped);
-        self::assertSame([[$this->lastPurge + 30, 'lit_mcp_wpsc_trailing_purge']], $this->scheduled);
+        self::assertSame([[$this->lastPurge + 30, 'lit_mcp_wpfc_trailing_purge']], $this->scheduled);
    }

    /** Options-table transients come back as strings. */
@@ -337,7 +325,7 @@ final class SuperCacheListenerTest extends TestCase
        $listener = $this->listener();
        $listener->trailingPurge();

-        self::assertSame(['all:0'], $this->purges);
+        self::assertSame(['all'], $this->purges);
        self::assertCount(1, $this->stamped);
    }

@@ -351,7 +339,7 @@ final class SuperCacheListenerTest extends TestCase

    public function testAThrowingTrailingPurgeIsLogged(): void
    {
-        $listener = new SuperCacheListener(
+        $listener = new FastestCacheListener(
            static fn (): bool => true,
            static fn (): bool => true,
            null,
@@ -367,13 +355,13 @@ final class SuperCacheListenerTest extends TestCase

    public function testAThrowingPurgeIsLoggedAndNotRethrown(): void
    {
-        $listener = new SuperCacheListener(
+        $listener = new FastestCacheListener(
            static fn (): bool => true,
            static fn (): bool => true,
            static function (): void {
                throw new \RuntimeException('disk full');
            },
-            static fn (int $blog): null => null,
+            static fn (): null => null,
            static fn (): int => 12
        );

@@ -389,37 +377,37 @@ final class SuperCacheListenerTest extends TestCase
        $listener->register();

        self::assertSame(10, has_action('lit_mcp_changed', [$listener, 'onChange']));
-        self::assertSame(10, has_action('lit_mcp_wpsc_trailing_purge', [$listener, 'trailingPurge']));
+        self::assertSame(10, has_action('lit_mcp_wpfc_trailing_purge', [$listener, 'trailingPurge']));
    }

-    /** Plugin wires create(): without WP Super Cache nothing is usable, and with the cache off nothing is asked. */
+    /** Plugin wires create(): without WP Fastest Cache nothing is usable, and with the cache off nothing is asked. */
    public function testCreateAsksTheCompatibilityOnlyWhenTheCacheIsOn(): void
    {
-        $compatibility = new Compatibility([SuperCacheCompatibility::profile()]);
-        $listener = SuperCacheListener::create($compatibility);
+        $compatibility = new Compatibility([FastestCacheCompatibility::profile()]);
+        $listener = FastestCacheListener::create($compatibility);

        $listener->onChange('lit/wp-settings-update', 'option', 'blogname', 1);
        $listener->flush();
        self::assertSame('', $this->logged());

-        $GLOBALS['cache_enabled'] = true;
+        $GLOBALS['wp_fastest_cache_options'] = (object) ['wpFastestCacheStatus' => 'on'];
        $listener->onChange('lit/wp-settings-update', 'option', 'blogname', 1);
        $listener->flush();
-        self::assertStringContainsString('wpsc-purge-all not usable', $this->logged());
+        self::assertStringContainsString('wpfc-purge-all not usable', $this->logged());
    }

-    public function testTheDefaultCacheSwitchIsTheWpscGlobal(): void
+    public function testTheDefaultCacheSwitchIsTheStatusOfWpfc(): void
    {
        $post = new WP_Post();
        Functions\when('get_post')->justReturn($post);
        Functions\when('get_post_type_object')->justReturn((object) ['public' => true]);
-        $listener = new SuperCacheListener(static fn (): bool => true);
+        $listener = new FastestCacheListener(static fn (): bool => true);

-        $GLOBALS['cache_enabled'] = false;
+        $GLOBALS['wp_fastest_cache_options'] = (object) [];
        $listener->onChange('lit/content-update', 'page', '12', 5);
        $listener->flush();

-        self::assertSame('', $this->logged(), 'unset or false cache_enabled: silent, nothing purged');
+        self::assertSame('', $this->logged(), 'cache switched off: silent, nothing purged');
        self::assertFalse(has_action('shutdown', [$listener, 'flush']));
    }

@@ -430,18 +418,18 @@ final class SuperCacheListenerTest extends TestCase
        bool $public,
        bool $exists
    ): void {
-        $GLOBALS['cache_enabled'] = true;
+        $GLOBALS['wp_fastest_cache_options'] = (object) ['wpFastestCacheStatus' => 'on'];
        Functions\when('get_post_type_object')->justReturn((object) ['public' => $public]);
        Functions\when('get_post')->justReturn($exists ? new WP_Post() : null);
        $purged = [];
-        Functions\when('wp_cache_clear_cache')->alias(static function () use (&$purged): void {
+        Functions\when('wpfc_clear_all_cache')->alias(static function () use (&$purged): void {
            $purged[] = 'all';
        });
-        Functions\when('wp_cache_post_edit')->alias(static function () use (&$purged): void {
+        Functions\when('wpfc_clear_post_cache_by_id')->alias(static function () use (&$purged): void {
            $purged[] = 'post';
        });

-        $listener = new SuperCacheListener(static fn (): bool => true);
+        $listener = new FastestCacheListener(static fn (): bool => true);
        $listener->onChange('lit/x', $type, $id, 1);
        $listener->flush();

@@ -0,0 +1,421 @@
+<?php
+
+declare(strict_types=1);
+
+namespace LIT\MCP\Tests\Unit\Integrations\FastestCache;
+
+use Brain\Monkey\Functions;
+use Closure;
+use LIT\MCP\Compatibility\ThrowawayPost;
+use LIT\MCP\Integrations\FastestCache\FastestCacheProbe;
+use LIT\MCP\Tests\Unit\TestCase;
+use Mockery;
+use RuntimeException;
+use WP_Post;
+
+final class FastestCacheProbeTest extends TestCase
+{
+    private string $cacheRoot = '';
+
+    /** @var list<int> */
+    private array $deleted = [];
+
+    /** @var array<string, mixed>|null The wp_insert_post arguments. */
+    private ?array $inserted = null;
+
+    /** @var array<string, mixed> Globals the test changes (only those that existed). */
+    private array $savedGlobals = [];
+
+    private const GLOBALS_CHANGED = ['wp_fastest_cache', 'wp_fastest_cache_options', 'wpdb'];
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $this->cacheRoot = sys_get_temp_dir() . '/lit-mcp-wpfc-' . bin2hex(random_bytes(4)) . '/';
+        mkdir($this->cacheRoot . 'cache/all/', 0777, true);
+        $this->deleted = [];
+        $this->inserted = null;
+        $this->savedGlobals = [];
+        foreach (self::GLOBALS_CHANGED as $name) {
+            if (array_key_exists($name, $GLOBALS)) {
+                $this->savedGlobals[$name] = $GLOBALS[$name];
+            }
+        }
+        Functions\when('wp_insert_post')->alias(function (array $post): int {
+            $this->inserted = $post;
+
+            return 77;
+        });
+        Functions\when('wp_delete_post')->alias(function (int $id, bool $force): WP_Post {
+            self::assertTrue($force, 'never to the trash');
+            $this->deleted[] = $id;
+
+            return new WP_Post(['ID' => $id]);
+        });
+        Functions\when('wp_mkdir_p')->alias(static fn (string $dir): bool => is_dir($dir) || @mkdir($dir, 0777, true));
+    }
+
+    protected function tearDown(): void
+    {
+        foreach (self::GLOBALS_CHANGED as $name) {
+            if (array_key_exists($name, $this->savedGlobals)) {
+                $GLOBALS[$name] = $this->savedGlobals[$name];
+            } else {
+                unset($GLOBALS[$name]);
+            }
+        }
+        self::removeTree($this->cacheRoot);
+        parent::tearDown();
+    }
+
+    private static function removeTree(string $path): void
+    {
+        foreach (glob(rtrim($path, '/') . '/{,.}*', GLOB_BRACE) ?: [] as $entry) {
+            if (in_array(basename($entry), ['.', '..'], true)) {
+                continue;
+            }
+            is_dir($entry) ? self::removeTree($entry) : unlink($entry);
+        }
+        @rmdir($path);
+    }
+
+    private function pageDir(): string
+    {
+        return $this->cacheRoot . 'cache/all/lit-mcp-check-77/';
+    }
+
+    /**
+     * @param (Closure(int): void)|null    $purge
+     * @param (Closure(int): ?string)|null $cacheDir
+     */
+    private function probe(
+        ?Closure $purge = null,
+        ?Closure $cacheDir = null,
+        bool $enabled = true,
+        bool $hooked = true,
+        bool $slugSet = true
+    ): FastestCacheProbe {
+        return new FastestCacheProbe(
+            static fn (): bool => $enabled,
+            static fn (): bool => $hooked,
+            $cacheDir ?? fn (int $id): string => $this->pageDir(),
+            $purge ?? fn (int $id) => unlink($this->pageDir() . 'index.html'),
+            static fn (int $id): bool => $slugSet
+        );
+    }
+
+    /** Captures what Log writes to the PHP error log while $run runs. */
+    private function logged(Closure $run): string
+    {
+        $log = (string) tempnam(sys_get_temp_dir(), 'lit-mcp-log');
+        $previous = ini_set('error_log', $log);
+        try {
+            $run();
+
+            return (string) file_get_contents($log);
+        } finally {
+            ini_set('error_log', (string) $previous);
+            unlink($log);
+        }
+    }
+
+    public function testGreenWhenThePurgeRemovesTheCacheFileAndNothingIsLeftBehind(): void
+    {
+        $probe = $this->probe(function (int $id): void {
+            self::assertFileExists($this->pageDir() . 'index.html', 'the file is there before the purge');
+            unlink($this->pageDir() . 'index.html');
+        });
+
+        self::assertSame([], $probe->run());
+        self::assertDirectoryDoesNotExist($this->pageDir());
+        self::assertDirectoryExists($this->cacheRoot . 'cache/all/');
+        self::assertSame([77], $this->deleted);
+    }
+
+    public function testCreatesAMarkedDraftPage(): void
+    {
+        $this->probe()->run();
+
+        self::assertSame('page', $this->inserted['post_type']);
+        self::assertSame('draft', $this->inserted['post_status']);
+        self::assertStringStartsWith(ThrowawayPost::TITLE, $this->inserted['post_title']);
+        self::assertSame([ThrowawayPost::MARKER => '1'], $this->inserted['meta_input']);
+    }
+
+    /** WPFC moves the whole directory away (to cache/tmpWpfc). */
+    public function testADirectoryThePurgeMovedAwayIsGreen(): void
+    {
+        $problems = $this->probe(function (int $id): void {
+            rename($this->pageDir(), $this->cacheRoot . 'moved');
+        })->run();
+
+        self::assertSame([], $problems);
+    }
+
+    public function testACacheFileThatSurvivesThePurgeIsAFixedTextAndIsRemovedAnyway(): void
+    {
+        $problems = [];
+        $logged = $this->logged(function () use (&$problems): void {
+            $problems = $this->probe(static fn (int $id) => null)->run();
+        });
+
+        self::assertSame(['Die Testdatei im Cache blieb nach dem Leeren durch WP Fastest Cache bestehen.'], $problems);
+        self::assertStringContainsString('lit-mcp-check-77', $logged);
+        self::assertDirectoryDoesNotExist($this->pageDir());
+        self::assertSame([77], $this->deleted);
+    }
+
+    public function testAForeignFileInThePageDirectoryIsLeftAlone(): void
+    {
+        $problems = $this->probe(function (int $id): void {
+            unlink($this->pageDir() . 'index.html');
+            touch($this->pageDir() . 'fremd.txt');
+        })->run();
+
+        self::assertSame([], $problems);
+        self::assertFileExists($this->pageDir() . 'fremd.txt');
+    }
+
+    public function testAnExceptionOfThePurgeIsAFixedTextALogLineAndEverythingIsCleanedUp(): void
+    {
+        $problems = [];
+        $logged = $this->logged(function () use (&$problems): void {
+            $problems = $this->probe(static function (int $id): never {
+                throw new RuntimeException('WPFC kaputt');
+            })->run();
+        });
+
+        self::assertSame(['Fastest-Cache-Probe abgebrochen (Details im PHP-Error-Log).'], $problems);
+        self::assertStringContainsString('WPFC kaputt', $logged);
+        self::assertDirectoryDoesNotExist($this->pageDir());
+        self::assertSame([77], $this->deleted);
+    }
+
+    public function testNothingToProbeWhileTheCacheIsSwitchedOff(): void
+    {
+        self::assertNull($this->probe(enabled: false)->run());
+        self::assertNull($this->inserted);
+    }
+
+    /** Without the hook wpfc_clear_post_cache_by_id does nothing: the purge of a post would silently fail. */
+    public function testAMissingPurgeHookIsAProblemWithoutAnyPage(): void
+    {
+        self::assertSame(
+            ['WP Fastest Cache verarbeitet wpfc_clear_post_cache_by_id nicht mehr; das Leeren eines Beitrags bliebe wirkungslos.'],
+            $this->probe(hooked: false)->run()
+        );
+        self::assertNull($this->inserted);
+    }
+
+    public function testNothingToProbeWithoutACachePathForThePage(): void
+    {
+        self::assertNull($this->probe(cacheDir: static fn (int $id): ?string => null)->run());
+        self::assertSame([77], $this->deleted);
+    }
+
+    public function testARefusedSlugIsItsOwnFixedProblemAndTheProbeNeverPurges(): void
+    {
+        $purged = false;
+        $problems = [];
+        $logged = $this->logged(function () use (&$problems, &$purged): void {
+            $problems = $this->probe(static function (int $id) use (&$purged): void {
+                $purged = true;
+            }, slugSet: false)->run();
+        });
+
+        self::assertSame(['Die Adresse der Testseite konnte nicht gesetzt werden (Details im PHP-Error-Log).'], $problems);
+        self::assertStringContainsString('77', $logged);
+        self::assertFalse($purged);
+        self::assertSame([77], $this->deleted);
+    }
+
+    public function testACacheDirectoryThatCannotBeCreatedIsAFixedText(): void
+    {
+        $blocker = $this->cacheRoot . 'blocker';
+        file_put_contents($blocker, 'x');
+        $problems = [];
+        $logged = $this->logged(function () use (&$problems, $blocker): void {
+            $problems = $this->probe(cacheDir: static fn (int $id): string => $blocker . '/seite/')->run();
+        });
+
+        self::assertSame(['Die Testdatei konnte nicht im Cache-Verzeichnis angelegt werden (Details im PHP-Error-Log).'], $problems);
+        self::assertStringContainsString('seite', $logged);
+        self::assertSame([77], $this->deleted);
+    }
+
+    // --- Defaults: the real WPFC and WordPress calls ----------------------------------------------------------------
+
+    /** Records calls; getWpContentDir like WPFC without WPML/multisite: content dir plus path. */
+    private function fakeWpfc(): object
+    {
+        return new class ($this->cacheRoot) {
+            /** @var list<array{mixed, mixed, mixed}> */
+            public array $calls = [];
+
+            public function __construct(private string $root)
+            {
+            }
+
+            public function singleDeleteCache(mixed $comment = false, mixed $post = false, mixed $parents = true): void
+            {
+                $this->calls[] = [$comment, $post, $parents];
+            }
+
+            public function getWpContentDir(string $path): string
+            {
+                return rtrim($this->root, '/') . $path;
+            }
+        };
+    }
+
+    public function testTheDefaultPurgeIsSingleDeleteCacheWithoutTheParentPages(): void
+    {
+        $GLOBALS['wp_fastest_cache'] = $wpfc = $this->fakeWpfc();
+        $probe = new FastestCacheProbe(
+            static fn (): bool => true,
+            static fn (): bool => true,
+            fn (int $id): string => $this->pageDir(),
+            null,
+            static fn (int $id): bool => true
+        );
+
+        $this->logged(static function () use ($probe): void {
+            $probe->run();
+        });
+
+        self::assertSame([[false, 77, false]], $wpfc->calls);
+    }
+
+    public function testTheDefaultHookCheckAsksForTheMethodOfTheWpfcInstance(): void
+    {
+        $GLOBALS['wp_fastest_cache'] = $wpfc = $this->fakeWpfc();
+        Functions\expect('has_action')->twice()
+            ->with('wpfc_clear_post_cache_by_id', [$wpfc, 'singleDeleteCache'])
+            ->andReturn(10, false);
+        $probe = new FastestCacheProbe(
+            static fn (): bool => true,
+            null,
+            static fn (int $id): ?string => null,
+            null,
+            static fn (int $id): bool => true
+        );
+
+        self::assertNull($probe->run(), 'hooked: on to the page, no path: not checked');
+        self::assertCount(1, $probe->run() ?? [], 'not hooked: one problem');
+    }
+
+    public function testTheDefaultEnabledCheckReadsTheWpfcSwitch(): void
+    {
+        $GLOBALS['wp_fastest_cache_options'] = (object) [];
+        self::assertNull((new FastestCacheProbe())->run());
+
+        $GLOBALS['wp_fastest_cache_options'] = [];
+        self::assertNull((new FastestCacheProbe())->run());
+    }
+
+    public function testTheDefaultSlugIsWrittenStraightToTheDatabaseWithoutHooks(): void
+    {
+        $wpdb = Mockery::mock();
+        $wpdb->posts = 'wp_posts';
+        $wpdb->expects('update')->with('wp_posts', ['post_name' => 'lit-mcp-check-77'], ['ID' => 77])->andReturn(1);
+        $GLOBALS['wpdb'] = $wpdb;
+        Functions\expect('clean_post_cache')->never();
+        $dropped = [];
+        Functions\when('wp_cache_delete')->alias(static function (int $id, string $group) use (&$dropped): bool {
+            $dropped[] = $group . ':' . $id;
+
+            return true;
+        });
+
+        $probe = new FastestCacheProbe(
+            static fn (): bool => true,
+            static fn (): bool => true,
+            fn (int $id): string => $this->pageDir(),
+            fn (int $id) => unlink($this->pageDir() . 'index.html')
+        );
+
+        self::assertSame([], $probe->run());
+        self::assertSame(['posts:77'], $dropped, 'the object cache must not keep the empty slug');
+    }
+
+    /** @return array<string, array{0: int|false}> */
+    public static function refusedUpdates(): array
+    {
+        return ['database error' => [false], 'no row changed' => [0]];
+    }
+
+    /** @dataProvider refusedUpdates */
+    public function testTheDefaultSlugWriterTreatsAFailedOrEmptyUpdateAsRefused(int|false $result): void
+    {
+        $wpdb = Mockery::mock();
+        $wpdb->posts = 'wp_posts';
+        $wpdb->shouldReceive('update')->andReturn($result);
+        $GLOBALS['wpdb'] = $wpdb;
+        Functions\when('wp_cache_delete')->justReturn(true);
+
+        $problems = [];
+        $this->logged(function () use (&$problems): void {
+            $problems = (new FastestCacheProbe(
+                static fn (): bool => true,
+                static fn (): bool => true,
+                fn (int $id): string => $this->pageDir(),
+                static fn (int $id) => self::fail('no purge without the slug')
+            ))->run();
+        });
+
+        self::assertSame(['Die Adresse der Testseite konnte nicht gesetzt werden (Details im PHP-Error-Log).'], $problems);
+    }
+
+    private function permalink(string $address): void
+    {
+        $GLOBALS['wp_fastest_cache'] = $this->fakeWpfc();
+        Functions\when('get_post')->justReturn(new WP_Post(['ID' => 77, 'post_status' => 'draft']));
+        Functions\when('get_permalink')->alias(static function (WP_Post $post) use ($address): string {
+            self::assertSame('publish', $post->post_status, 'the address the draft would have once published');
+
+            return $address;
+        });
+    }
+
+    public function testTheDefaultCachePathIsTheProbePageDirectoryBelowCacheAll(): void
+    {
+        $this->permalink('https://example.test/lit-mcp-check-77/');
+
+        self::assertSame($this->pageDir(), FastestCacheProbe::cacheDirFor(77));
+    }
+
+    public function testTheDefaultCachePathKeepsTheSubdirectoryOfTheSite(): void
+    {
+        $this->permalink('https://example.test/wp/lit-mcp-check-77/');
+
+        self::assertSame($this->cacheRoot . 'cache/all/wp/lit-mcp-check-77/', FastestCacheProbe::cacheDirFor(77));
+    }
+
+    /** @return array<string, array{0: string}> */
+    public static function foreignAddresses(): array
+    {
+        return [
+            'plain address' => ['https://example.test/?page_id=77'],
+            'home page' => ['https://example.test/'],
+            'other slug' => ['https://example.test/seite/'],
+            'other probe' => ['https://example.test/lit-mcp-check-78/'],
+            'slug as suffix only' => ['https://example.test/x-lit-mcp-check-77/'],
+            'traversal' => ['https://example.test/../lit-mcp-check-77/'],
+        ];
+    }
+
+    /** @dataProvider foreignAddresses */
+    public function testTheDefaultCachePathIsNullForAnythingButTheProbePage(string $address): void
+    {
+        $this->permalink($address);
+
+        self::assertNull(FastestCacheProbe::cacheDirFor(77));
+    }
+
+    public function testTheDefaultCachePathIsNullForAMissingPost(): void
+    {
+        Functions\when('get_post')->justReturn(null);
+
+        self::assertNull(FastestCacheProbe::cacheDirFor(77));
+    }
+}
@@ -2,27 +2,27 @@

 declare(strict_types=1);

-namespace LIT\MCP\Tests\Unit\Integrations\SuperCache;
+namespace LIT\MCP\Tests\Unit\Integrations\FastestCache;

 use Brain\Monkey\Functions;
-use LIT\MCP\Integrations\SuperCache\SuperCacheFeature;
-use LIT\MCP\Integrations\SuperCache\SuperCachePurger;
+use LIT\MCP\Integrations\FastestCache\FastestCacheFeature;
+use LIT\MCP\Integrations\FastestCache\FastestCachePurger;
 use LIT\MCP\Tests\Unit\TestCase;

-final class SuperCachePurgerTest extends TestCase
+final class FastestCachePurgerTest extends TestCase
 {
    public function testALockedWholePurgeDoesNothingAndSaysSo(): void
    {
        $previous = ini_set('error_log', '/dev/null');
        Functions\expect('get_transient')->never();
-        $purger = new SuperCachePurger(
-            static fn (SuperCacheFeature $feature): bool => false,
+        $purger = new FastestCachePurger(
+            static fn (FastestCacheFeature $feature): bool => false,
            static fn (): bool => true,
            static fn (int $id) => self::fail('no post purge'),
-            static fn (int $blog) => self::fail('no whole purge')
+            static fn () => self::fail('no whole purge')
        );

-        self::assertSame(SuperCachePurger::LOCKED, $purger->everything());
+        self::assertSame(FastestCachePurger::LOCKED, $purger->everything());
        self::assertFalse($purger->post(3));
        ini_set('error_log', (string) $previous);
    }
@@ -33,7 +33,7 @@ final class SuperCachePurgerTest extends TestCase
        Functions\when('get_transient')->alias(static function () use (&$stamp) {
            return $stamp;
        });
-        $purger = new SuperCachePurger(static fn (): bool => true);
+        $purger = new FastestCachePurger(static fn (): bool => true);

        self::assertFalse($purger->throttled());
        $stamp = (string) (time() - 5);
@@ -56,9 +56,9 @@ final class SuperCachePurgerTest extends TestCase

            return true;
        });
-        $purger = new SuperCachePurger(static fn (): bool => true);
+        $purger = new FastestCachePurger(static fn (): bool => true);

-        self::assertSame(SuperCachePurger::THROTTLED, $purger->everything());
+        self::assertSame(FastestCachePurger::THROTTLED, $purger->everything());

        self::assertSame(1, $reads);
        self::assertCount(1, $scheduledAt);
@@ -1,121 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace LIT\MCP\Tests\Unit\Integrations\SuperCache;
-
-use Brain\Monkey\Functions;
-use LIT\MCP\Compatibility\Call;
-use LIT\MCP\Compatibility\CheckStep;
-use LIT\MCP\Compatibility\Compatibility;
-use LIT\MCP\Compatibility\Tier;
-use LIT\MCP\Integrations\Divi\Release\DiviProfile;
-use LIT\MCP\Integrations\Pods\PodsCompatibility;
-use LIT\MCP\Integrations\SuperCache\SuperCacheCheckSteps;
-use LIT\MCP\Integrations\SuperCache\SuperCacheCompatibility;
-use LIT\MCP\Integrations\SuperCache\SuperCacheFeature;
-use LIT\MCP\Tests\Unit\TestCase;
-
-final class SuperCacheCompatibilityTest extends TestCase
-{
-    public function testDescribesSuperCacheAsALockOnFailurePlugin(): void
-    {
-        $profile = SuperCacheCompatibility::profile();
-
-        self::assertSame('wpsc', $profile->id);
-        self::assertSame('WP Super Cache', $profile->label);
-        self::assertSame(Tier::LockOnFailure, $profile->tier);
-        self::assertSame(['3.1.5'], $profile->testedVersions);
-        self::assertNull($profile->minVersion);
-        self::assertSame(SuperCacheFeature::cases(), $profile->capabilities);
-    }
-
-    /** Argument counts are those the listener passes; wp_cache_clear_cache($blog_id = 0) gets the blog. */
-    public function testTheManifestHoldsTheTwoPurgeFunctionsWithTheirArgumentCounts(): void
-    {
-        $manifest = SuperCacheCompatibility::profile()->manifests[0];
-        $calls = [];
-        foreach ($manifest->calls as $call) {
-            $calls[$call->symbol] = [$call->args, $call->features()];
-        }
-
-        self::assertSame([
-            'wp_cache_post_edit' => [1, [SuperCacheFeature::PurgePost]],
-            'wp_cache_clear_cache' => [1, [SuperCacheFeature::PurgeAll]],
-        ], $calls);
-        self::assertContainsOnlyInstancesOf(Call::class, $manifest->calls);
-    }
-
-    /** Both purge functions read $cache_path; wp_cache_post_edit also $blog_cache_dir. */
-    public function testTheGlobalsTheFunctionsReadAreRequired(): void
-    {
-        $manifest = SuperCacheCompatibility::profile()->manifests[0];
-
-        self::assertSame(['WPCACHEHOME'], array_map(static fn ($c) => $c->name, $manifest->constants));
-        $globals = [];
-        foreach ($manifest->globals as $global) {
-            $globals[$global->name] = $global->features();
-        }
-        self::assertSame(
-            ['cache_path' => SuperCacheFeature::cases(), 'blog_cache_dir' => [SuperCacheFeature::PurgePost]],
-            $globals
-        );
-    }
-
-    /**
-     * @runInSeparateProcess
-     * @preserveGlobalState disabled
-     */
-    public function testActiveAndVersionFollowTheCacheHomeConstantAndThePluginHeader(): void
-    {
-        $profile = SuperCacheCompatibility::profile();
-        self::assertFalse(($profile->active)());
-        self::assertNull(($profile->version)());
-
-        define('WPCACHEHOME', '/plugins/wp-super-cache/');
-        Functions\expect('get_file_data')
-            ->once()
-            ->with('/plugins/wp-super-cache/wp-cache.php', ['Version' => 'Version'])
-            ->andReturn(['Version' => '3.1.5']);
-
-        self::assertTrue(($profile->active)());
-        self::assertSame('3.1.5', ($profile->version)());
-    }
-
-    /**
-     * @runInSeparateProcess
-     * @preserveGlobalState disabled
-     */
-    public function testAnUnreadableHeaderIsAnUnknownVersion(): void
-    {
-        define('WPCACHEHOME', '/plugins/wp-super-cache/');
-        Functions\when('get_file_data')->justReturn(['Version' => '']);
-
-        self::assertNull((SuperCacheCompatibility::profile()->version)());
-    }
-
-    public function testTheCheckHasTheProbeAsExtraStep(): void
-    {
-        $profile = SuperCacheCompatibility::profile();
-
-        self::assertNotNull($profile->extraSteps);
-        $steps = ($profile->extraSteps)(false);
-        self::assertSame([SuperCacheCheckSteps::PROBE], array_map(static fn ($step): string => $step->key, $steps));
-        self::assertTrue($steps[0]->skipped);
-        self::assertNotNull($profile->stepLabel);
-        self::assertSame(
-            'Leeren-Test an einer Wegwerf-Seite im Cache',
-            ($profile->stepLabel)(new CheckStep(SuperCacheCheckSteps::PROBE, []))
-        );
-    }
-
-    public function testAllProfilesCoexistWithoutIdCollision(): void
-    {
-        $compatibility = new Compatibility(
-            [DiviProfile::profile(), PodsCompatibility::profile(), SuperCacheCompatibility::profile()]
-        );
-
-        self::assertSame(['divi', 'pods', 'wpsc'], array_map(static fn ($p) => $p->id, $compatibility->profiles()));
-        self::assertSame(SuperCacheFeature::PurgeAll, $compatibility->capability('wpsc-purge-all'));
-    }
-}
@@ -1,75 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace LIT\MCP\Tests\Unit\Integrations\SuperCache;
-
-use Brain\Monkey\Functions;
-use LIT\MCP\Admin\CompatibilityTab;
-use LIT\MCP\Compatibility\ProvidesCompatibility;
-use LIT\MCP\Integrations\Bootable;
-use LIT\MCP\Integrations\Integration;
-use LIT\MCP\Integrations\SuperCache\SuperCacheCompatibility;
-use LIT\MCP\Integrations\SuperCache\SuperCacheIntegration;
-use LIT\MCP\Integrations\SuperCache\SuperCachePurger;
-use LIT\MCP\Tests\Support\FakeChangeLog;
-use LIT\MCP\Tests\Unit\TestCase;
-
-final class SuperCacheIntegrationTest extends TestCase
-{
-    private static function purger(): SuperCachePurger
-    {
-        return new SuperCachePurger(static fn (): bool => true);
-    }
-
-    public function testIsAnIntegrationThatProvidesItsProfileAndTheCacheClearTool(): void
-    {
-        $integration = new SuperCacheIntegration(null, self::purger(), FakeChangeLog::forbidden());
-
-        self::assertInstanceOf(Integration::class, $integration);
-        self::assertInstanceOf(ProvidesCompatibility::class, $integration);
-        self::assertSame('wpsc', $integration->id());
-        self::assertSame('WP Super Cache', $integration->label());
-        self::assertEquals(['lit/cache-clear'], array_map(static fn ($a): string => $a->name(), $integration->abilities()));
-        self::assertEquals([SuperCacheCompatibility::profile()], $integration->compatibilities());
-    }
-
-    public function testIsAvailableOnlyWithSuperCache(): void
-    {
-        self::assertSame(defined('WPCACHEHOME'), (new SuperCacheIntegration(null, self::purger(), FakeChangeLog::forbidden()))->isAvailable());
-    }
-
-    public function testBootHooksTheOrphanCleanupIntoTheProfileLoad(): void
-    {
-        $integration = new SuperCacheIntegration(null, self::purger(), FakeChangeLog::forbidden());
-        $integration->boot();
-
-        self::assertInstanceOf(Bootable::class, $integration);
-        self::assertNotFalse(has_action(CompatibilityTab::LOAD_ACTION, [$integration, 'removeOrphans']));
-    }
-
-    public function testNoCleanupForAnotherProfileWithoutWpscOrWithoutTheCapability(): void
-    {
-        Functions\expect('get_posts')->never();
-        Functions\when('current_user_can')->justReturn(true);
-        (new SuperCacheIntegration(static fn (): bool => true, self::purger(), FakeChangeLog::forbidden()))->removeOrphans('pods');
-        (new SuperCacheIntegration(static fn (): bool => false, self::purger(), FakeChangeLog::forbidden()))->removeOrphans('wpsc');
-
-        Functions\when('current_user_can')->justReturn(false);
-        (new SuperCacheIntegration(static fn (): bool => true, self::purger(), FakeChangeLog::forbidden()))->removeOrphans('wpsc');
-        $this->addToAssertionCount(1);
-    }
-
-    public function testCleansUpPagesForTheAdministratorWithWpsc(): void
-    {
-        Functions\when('current_user_can')->justReturn(true);
-        Functions\expect('get_posts')->once()->andReturnUsing(static function (array $args): array {
-            self::assertSame('page', $args['post_type']);
-            self::assertSame(['draft', 'private'], $args['post_status']);
-
-            return [];
-        });
-
-        (new SuperCacheIntegration(static fn (): bool => true, self::purger(), FakeChangeLog::forbidden()))->removeOrphans('wpsc');
-    }
-}
@@ -1,525 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace LIT\MCP\Tests\Unit\Integrations\SuperCache;
-
-use Brain\Monkey\Functions;
-use Closure;
-use LIT\MCP\Compatibility\ThrowawayPost;
-use LIT\MCP\Integrations\SuperCache\SuperCacheProbe;
-use LIT\MCP\Tests\Unit\TestCase;
-use Mockery;
-use RuntimeException;
-use WP_Post;
-
-final class SuperCacheProbeTest extends TestCase
-{
-    private string $cacheRoot = '';
-
-    /** @var list<int> */
-    private array $deleted = [];
-
-    /** @var list<string> "<id>:<status>" in call order. */
-    private array $statuses = [];
-
-    /** @var array<string, mixed>|null The wp_insert_post arguments. */
-    private ?array $inserted = null;
-
-    /** @var array<string, mixed> Globals the test changes (only those that existed). */
-    private array $savedGlobals = [];
-
-    private const GLOBALS_CHANGED = ['cache_enabled', 'cache_path', 'wpdb', 'wp_cache_clear_on_post_edit'];
-
-    /** The status the fake status switch refuses to set (returns false); null = none. */
-    private ?string $refusedStatus = null;
-
-    /** The status the fake status switch throws for; null = none. */
-    private ?string $throwingStatus = null;
-
-    protected function setUp(): void
-    {
-        parent::setUp();
-        $this->cacheRoot = sys_get_temp_dir() . '/lit-mcp-wpsc-' . bin2hex(random_bytes(4)) . '/';
-        mkdir($this->cacheRoot . 'supercache/example.test/', 0777, true);
-        $this->deleted = [];
-        $this->statuses = [];
-        $this->inserted = null;
-        $this->refusedStatus = null;
-        $this->throwingStatus = null;
-        $this->savedGlobals = [];
-        foreach (self::GLOBALS_CHANGED as $name) {
-            if (array_key_exists($name, $GLOBALS)) {
-                $this->savedGlobals[$name] = $GLOBALS[$name];
-            }
-        }
-        Functions\when('wp_insert_post')->alias(function (array $post): int {
-            $this->inserted = $post;
-
-            return 77;
-        });
-        Functions\when('wp_delete_post')->alias(function (int $id, bool $force): WP_Post {
-            self::assertTrue($force, 'never to the trash');
-            $this->deleted[] = $id;
-
-            return new WP_Post(['ID' => $id]);
-        });
-        Functions\when('wp_mkdir_p')->alias(static fn (string $dir): bool => is_dir($dir) || @mkdir($dir, 0777, true));
-    }
-
-    protected function tearDown(): void
-    {
-        foreach (self::GLOBALS_CHANGED as $name) {
-            if (array_key_exists($name, $this->savedGlobals)) {
-                $GLOBALS[$name] = $this->savedGlobals[$name];
-            } else {
-                unset($GLOBALS[$name]);
-            }
-        }
-        self::removeTree($this->cacheRoot);
-        parent::tearDown();
-    }
-
-    private static function removeTree(string $path): void
-    {
-        foreach (glob(rtrim($path, '/') . '/{,.}*', GLOB_BRACE) ?: [] as $entry) {
-            if (in_array(basename($entry), ['.', '..'], true)) {
-                continue;
-            }
-            is_dir($entry) ? self::removeTree($entry) : unlink($entry);
-        }
-        @rmdir($path);
-    }
-
-    private function pageDir(): string
-    {
-        return $this->cacheRoot . 'supercache/example.test/lit-mcp-check-77/';
-    }
-
-    /** @param (Closure(int): void)|null $purge */
-    private function probe(?Closure $purge = null, ?Closure $cacheDir = null, bool $enabled = true): SuperCacheProbe
-    {
-        return new SuperCacheProbe(
-            static fn (): bool => $enabled,
-            $cacheDir ?? fn (int $id): string => $this->pageDir(),
-            $purge ?? fn (int $id) => unlink($this->pageDir() . 'index.html'),
-            function (int $id, string $status): bool {
-                $this->statuses[] = $id . ':' . $status;
-                if ($status === $this->throwingStatus) {
-                    throw new RuntimeException('Status kaputt');
-                }
-
-                return $status !== $this->refusedStatus;
-            }
-        );
-    }
-
-    /** Purge fake that does what WPSC does: the page's cache file disappears. */
-    private function purgingProbe(): SuperCacheProbe
-    {
-        return $this->probe(function (int $id): void {
-            self::assertFileExists($this->pageDir() . 'index.html', 'the file is there before the purge');
-            unlink($this->pageDir() . 'index.html');
-        });
-    }
-
-    /** Captures what Log writes to the PHP error log while $run runs. */
-    private function logged(Closure $run): string
-    {
-        $log = (string) tempnam(sys_get_temp_dir(), 'lit-mcp-log');
-        $previous = ini_set('error_log', $log);
-        try {
-            $run();
-
-            return (string) file_get_contents($log);
-        } finally {
-            ini_set('error_log', (string) $previous);
-            unlink($log);
-        }
-    }
-
-    public function testGreenWhenThePurgeRemovesTheCacheFileAndNothingIsLeftBehind(): void
-    {
-        self::assertSame([], $this->purgingProbe()->run());
-
-        self::assertDirectoryDoesNotExist($this->pageDir());
-        self::assertSame([77], $this->deleted);
-    }
-
-    public function testCreatesAMarkedDraftPageAndOnlyPassesThroughPrivateForThePurge(): void
-    {
-        $this->purgingProbe()->run();
-
-        self::assertSame('page', $this->inserted['post_type']);
-        self::assertSame('draft', $this->inserted['post_status']);
-        self::assertStringStartsWith(ThrowawayPost::TITLE, $this->inserted['post_title']);
-        self::assertSame([ThrowawayPost::MARKER => '1'], $this->inserted['meta_input']);
-        self::assertSame(['77:private', '77:draft'], $this->statuses);
-    }
-
-    public function testACacheFileThatSurvivesThePurgeIsAFixedTextAndIsRemovedAnyway(): void
-    {
-        $problems = [];
-        $logged = $this->logged(function () use (&$problems): void {
-            $problems = $this->probe(static fn (int $id) => null)->run();
-        });
-
-        self::assertSame(['Die Testdatei im Cache blieb nach dem Leeren durch WP Super Cache bestehen.'], $problems);
-        self::assertStringContainsString('lit-mcp-check-77', $logged);
-        self::assertDirectoryDoesNotExist($this->pageDir());
-        self::assertSame([77], $this->deleted);
-    }
-
-    public function testARenamedRebuildFileCountsAsPurgedAndIsCleanedUp(): void
-    {
-        $problems = $this->probe(function (int $id): void {
-            rename($this->pageDir() . 'index.html', $this->pageDir() . 'index.html.needs-rebuild');
-        })->run();
-
-        self::assertSame([], $problems);
-        self::assertDirectoryDoesNotExist($this->pageDir());
-    }
-
-    public function testADirectoryThePurgeAlreadyRemovedIsNoProblem(): void
-    {
-        $problems = $this->probe(function (int $id): void {
-            unlink($this->pageDir() . 'index.html');
-            rmdir($this->pageDir());
-        })->run();
-
-        self::assertSame([], $problems);
-    }
-
-    public function testAnExceptionOfThePurgeIsAFixedTextALogLineAndEverythingIsCleanedUp(): void
-    {
-        $problems = [];
-        $logged = $this->logged(function () use (&$problems): void {
-            $problems = $this->probe(static function (int $id): never {
-                throw new RuntimeException('WPSC kaputt');
-            })->run();
-        });
-
-        self::assertSame(['Super-Cache-Probe abgebrochen (Details im PHP-Error-Log).'], $problems);
-        self::assertStringContainsString('WPSC kaputt', $logged);
-        self::assertDirectoryDoesNotExist($this->pageDir());
-        self::assertSame([77], $this->deleted);
-        self::assertSame(['77:private', '77:draft'], $this->statuses);
-    }
-
-    public function testNothingToProbeWhileTheCacheIsSwitchedOff(): void
-    {
-        self::assertNull($this->probe(null, null, false)->run());
-        self::assertNull($this->inserted);
-    }
-
-    public function testNothingToProbeWithoutACachePathForThePage(): void
-    {
-        self::assertNull($this->probe(null, static fn (int $id): ?string => null)->run());
-        self::assertSame([77], $this->deleted);
-    }
-
-    public function testACacheDirectoryThatCannotBeCreatedIsAFixedText(): void
-    {
-        $blocker = $this->cacheRoot . 'blocker';
-        file_put_contents($blocker, 'x');
-        $problems = [];
-        $logged = $this->logged(function () use (&$problems, $blocker): void {
-            $problems = $this->probe(null, static fn (int $id): string => $blocker . '/seite/')->run();
-        });
-
-        self::assertSame(['Die Testdatei konnte nicht im Cache-Verzeichnis angelegt werden (Details im PHP-Error-Log).'], $problems);
-        self::assertStringContainsString('seite', $logged);
-        self::assertSame([77], $this->deleted);
-    }
-
-    public function testTheDefaultPurgeIsWpCachePostEdit(): void
-    {
-        Functions\expect('wp_cache_post_edit')->once()->with(77)->andReturnUsing(function (int $id): int {
-            unlink($this->pageDir() . 'index.html');
-
-            return $id;
-        });
-
-        $probe = new SuperCacheProbe(
-            static fn (): bool => true,
-            fn (int $id): string => $this->pageDir(),
-            null,
-            static fn (): bool => true
-        );
-
-        self::assertSame([], $probe->run());
-    }
-
-    public function testTheDefaultStatusSwitchWritesStatusAndSlugStraightToTheDatabaseWithoutHooks(): void
-    {
-        $wpdb = Mockery::mock();
-        $wpdb->posts = 'wp_posts';
-        $wpdb->expects('update')->with('wp_posts', ['post_status' => 'private', 'post_name' => 'lit-mcp-check-77'], ['ID' => 77])->andReturn(1);
-        $wpdb->expects('update')->with('wp_posts', ['post_status' => 'draft', 'post_name' => 'lit-mcp-check-77'], ['ID' => 77])->andReturn(1);
-        $GLOBALS['wpdb'] = $wpdb;
-        Functions\expect('clean_post_cache')->never();
-        $dropped = [];
-        Functions\when('wp_cache_delete')->alias(static function (int $id, string $group) use (&$dropped): bool {
-            $dropped[] = $group . ':' . $id;
-
-            return true;
-        });
-
-        $probe = new SuperCacheProbe(
-            static fn (): bool => true,
-            fn (int $id): string => $this->pageDir(),
-            fn (int $id) => unlink($this->pageDir() . 'index.html')
-        );
-
-        self::assertSame([], $probe->run());
-        self::assertSame(['posts:77', 'posts:77'], $dropped, 'the object cache must not keep the old status');
-    }
-
-    public function testTheDefaultEnabledCheckReadsTheWpscGlobal(): void
-    {
-        $GLOBALS['cache_enabled'] = false;
-        self::assertNull((new SuperCacheProbe())->run());
-
-        $GLOBALS['cache_enabled'] = null;
-        self::assertNull((new SuperCacheProbe())->run());
-    }
-
-    private function wpscDirs(string $home, string $current): void
-    {
-        Functions\when('get_supercache_dir')->justReturn($this->cacheRoot . 'supercache/' . $home . '/');
-        Functions\when('get_current_url_supercache_dir')->justReturn($this->cacheRoot . 'supercache/' . $current . '/');
-    }
-
-    public function testTheDefaultCachePathIsTheProbePageDirectoryBelowTheHomeHostDirectory(): void
-    {
-        $this->wpscDirs('example.test', 'example.test/lit-mcp-check-77');
-
-        self::assertSame($this->pageDir(), SuperCacheProbe::cacheDirFor(77));
-    }
-
-    /** WPSC derives the host from the request's Host header; the probe must not follow it somewhere else. */
-    public function testTheDefaultCachePathIsNullWhenWpscWouldUseAnotherHostThanTheHomeUrl(): void
-    {
-        $this->wpscDirs('example.test', 'www.example.test/lit-mcp-check-77');
-
-        self::assertNull(SuperCacheProbe::cacheDirFor(77));
-    }
-
-    public function testTheDefaultCachePathIsNullForAnythingButTheProbePageOfThisSite(): void
-    {
-        // A plain "?page_id=" address or an empty slug: WPSC resolves it to the home page's directory.
-        $this->wpscDirs('example.test', 'example.test');
-        self::assertNull(SuperCacheProbe::cacheDirFor(77));
-
-        $this->wpscDirs('example.test', 'example.test/seite');
-        self::assertNull(SuperCacheProbe::cacheDirFor(77));
-
-        $this->wpscDirs('example.test', 'example.test/lit-mcp-check-77/../../x');
-        self::assertNull(SuperCacheProbe::cacheDirFor(77));
-
-        $this->wpscDirs('example.test', 'example.test/lit-mcp-check-78');
-        self::assertNull(SuperCacheProbe::cacheDirFor(77));
-
-        Functions\when('get_current_url_supercache_dir')->justReturn('/var/www/html/lit-mcp-check-77/');
-        self::assertNull(SuperCacheProbe::cacheDirFor(77));
-    }
-
-    public function testTheDefaultCachePathIsNullWhenWpscKnowsNoDirectory(): void
-    {
-        Functions\when('get_supercache_dir')->justReturn(false);
-        Functions\when('get_current_url_supercache_dir')->justReturn(false);
-
-        self::assertNull(SuperCacheProbe::cacheDirFor(77));
-    }
-
-    public function testOnlyTheKnownCacheFilesOfTheProbePageAreRemoved(): void
-    {
-        $problems = $this->probe(function (int $id): void {
-            // What WPSC leaves after a rebuild-style purge, plus a file that is none of its names.
-            rename($this->pageDir() . 'index.html', $this->pageDir() . 'index.html.needs-rebuild');
-            touch($this->pageDir() . 'index-https.html');
-            touch($this->pageDir() . 'index-https.html.needs-rebuild');
-            touch($this->pageDir() . 'fremd.txt');
-        })->run();
-
-        self::assertSame([], $problems);
-        self::assertSame(['fremd.txt'], array_values(array_diff(scandir($this->pageDir()), ['.', '..'])));
-    }
-
-    public function testTheCacheDirectoryOfThePageIsRemovedWhenEmpty(): void
-    {
-        $this->purgingProbe()->run();
-
-        self::assertDirectoryDoesNotExist($this->pageDir());
-        self::assertDirectoryExists($this->cacheRoot . 'supercache/example.test/');
-    }
-
-    // --- P1: the purge must not empty the live cache ------------------------------------------------------------------
-
-    private function defaultPurgeProbe(): SuperCacheProbe
-    {
-        return new SuperCacheProbe(
-            static fn (): bool => true,
-            fn (int $id): string => $this->pageDir(),
-            null,
-            static fn (): bool => true
-        );
-    }
-
-    public function testTheDefaultPurgeRunsWithClearOnEditOffAndTheRelatedPagesFilterOffAndRestoresBoth(): void
-    {
-        $GLOBALS['wp_cache_clear_on_post_edit'] = 1;
-        $events = [];
-        $added = null;
-        Functions\expect('add_filter')->once()->with('wpsc_delete_related_pages_on_edit', Mockery::type(Closure::class), PHP_INT_MAX)
-            ->andReturnUsing(static function (string $hook, Closure $callback) use (&$events, &$added): bool {
-                $events[] = 'add_filter returning ' . var_export($callback(true), true);
-                $added = $callback;
-
-                return true;
-            });
-        Functions\expect('remove_filter')->once()->with('wpsc_delete_related_pages_on_edit', Mockery::type(Closure::class), PHP_INT_MAX)
-            ->andReturnUsing(static function (string $hook, Closure $callback) use (&$events, &$added): bool {
-                $events[] = $callback === $added ? 'remove_filter of the same callback' : 'remove_filter of ANOTHER callback';
-
-                return true;
-            });
-        Functions\expect('wp_cache_post_edit')->once()->with(77)->andReturnUsing(function (int $id) use (&$events): int {
-            $events[] = 'purge with clear_on_post_edit=' . var_export($GLOBALS['wp_cache_clear_on_post_edit'], true);
-            unlink($this->pageDir() . 'index.html');
-
-            return $id;
-        });
-
-        self::assertSame([], $this->defaultPurgeProbe()->run());
-
-        self::assertSame(
-            ['add_filter returning false', 'purge with clear_on_post_edit=0', 'remove_filter of the same callback'],
-            $events
-        );
-        self::assertSame(1, $GLOBALS['wp_cache_clear_on_post_edit']);
-    }
-
-    public function testTheDefaultPurgeLeavesAnUnsetClearOnEditGlobalUnset(): void
-    {
-        unset($GLOBALS['wp_cache_clear_on_post_edit']);
-        Functions\when('add_filter')->justReturn(true);
-        Functions\when('remove_filter')->justReturn(true);
-        Functions\expect('wp_cache_post_edit')->once()->andReturnUsing(function (int $id): int {
-            self::assertSame(0, $GLOBALS['wp_cache_clear_on_post_edit']);
-            unlink($this->pageDir() . 'index.html');
-
-            return $id;
-        });
-
-        self::assertSame([], $this->defaultPurgeProbe()->run());
-        self::assertArrayNotHasKey('wp_cache_clear_on_post_edit', $GLOBALS);
-    }
-
-    public function testTheDefaultPurgeRestoresGlobalAndFilterWhenWpscThrows(): void
-    {
-        $GLOBALS['wp_cache_clear_on_post_edit'] = '1';
-        Functions\expect('add_filter')->once()->andReturn(true);
-        Functions\expect('remove_filter')->once()->with('wpsc_delete_related_pages_on_edit', Mockery::type(Closure::class), PHP_INT_MAX)->andReturn(true);
-        Functions\expect('wp_cache_post_edit')->once()->andThrow(new RuntimeException('WPSC kaputt'));
-
-        $problems = [];
-        $this->logged(function () use (&$problems): void {
-            $problems = $this->defaultPurgeProbe()->run();
-        });
-
-        self::assertSame(['Super-Cache-Probe abgebrochen (Details im PHP-Error-Log).'], $problems);
-        self::assertSame('1', $GLOBALS['wp_cache_clear_on_post_edit']);
-    }
-
-    // --- P2: a status the database refused is no purge result ---------------------------------------------------------
-
-    public function testARefusedPrivateStatusIsItsOwnFixedProblemAndTheProbeNeverPurges(): void
-    {
-        $this->refusedStatus = 'private';
-        $purged = false;
-        $problems = [];
-        $logged = $this->logged(function () use (&$problems, &$purged): void {
-            $problems = $this->probe(static function (int $id) use (&$purged): void {
-                $purged = true;
-            })->run();
-        });
-
-        self::assertSame(['Der Status der Testseite konnte nicht gesetzt werden (Details im PHP-Error-Log).'], $problems);
-        self::assertStringContainsString('77', $logged);
-        self::assertStringContainsString('private', $logged);
-        self::assertFalse($purged);
-        self::assertSame([77], $this->deleted);
-        self::assertSame(['77:private', '77:draft'], $this->statuses);
-    }
-
-    /** @return array<string, array{0: int|false}> */
-    public static function refusedUpdates(): array
-    {
-        return ['database error' => [false], 'no row changed' => [0]];
-    }
-
-    /** @dataProvider refusedUpdates */
-    public function testTheDefaultStatusSwitchTreatsAFailedOrEmptyUpdateAsRefused(int|false $result): void
-    {
-        $wpdb = Mockery::mock();
-        $wpdb->posts = 'wp_posts';
-        $wpdb->shouldReceive('update')->andReturn($result);
-        $GLOBALS['wpdb'] = $wpdb;
-        Functions\when('wp_cache_delete')->justReturn(true);
-        Functions\expect('wp_cache_post_edit')->never();
-
-        $problems = [];
-        $this->logged(function () use (&$problems): void {
-            $problems = (new SuperCacheProbe(
-                static fn (): bool => true,
-                fn (int $id): string => $this->pageDir(),
-                fn (int $id) => null
-            ))->run();
-        });
-
-        self::assertSame(['Der Status der Testseite konnte nicht gesetzt werden (Details im PHP-Error-Log).'], $problems);
-        self::assertSame([77], $this->deleted);
-    }
-
-    public function testAFailingResetToDraftNeitherHidesTheResultNorEndsTheCheck(): void
-    {
-        $this->throwingStatus = 'draft';
-        $problems = [];
-        $logged = $this->logged(function () use (&$problems): void {
-            $problems = $this->purgingProbe()->run();
-        });
-
-        self::assertSame([], $problems);
-        self::assertStringContainsString('Status kaputt', $logged);
-        self::assertSame([77], $this->deleted);
-        self::assertDirectoryDoesNotExist($this->pageDir());
-    }
-
-    public function testAFailingResetToDraftDoesNotReplaceAnExceptionOfThePurge(): void
-    {
-        $this->throwingStatus = 'draft';
-        $problems = [];
-        $logged = $this->logged(function () use (&$problems): void {
-            $problems = $this->probe(static function (int $id): never {
-                throw new RuntimeException('WPSC kaputt');
-            })->run();
-        });
-
-        self::assertSame(['Super-Cache-Probe abgebrochen (Details im PHP-Error-Log).'], $problems);
-        self::assertStringContainsString('WPSC kaputt', $logged);
-        self::assertSame([77], $this->deleted);
-    }
-
-    public function testARefusedResetToDraftIsLoggedOnly(): void
-    {
-        $this->refusedStatus = 'draft';
-        $problems = [];
-        $logged = $this->logged(function () use (&$problems): void {
-            $problems = $this->purgingProbe()->run();
-        });
-
-        self::assertSame([], $problems);
-        self::assertStringContainsString('draft', $logged);
-    }
-}
@@ -50,18 +50,18 @@ final class PluginTest extends TestCase
    public function testIntegrationsInRegistryOrder(): void
    {
        self::assertSame(
-            ['core', 'wordpress', 'media', 'divi', 'divi-library', 'divi-theme-builder', 'pods', 'wpsc'],
+            ['core', 'wordpress', 'media', 'divi', 'divi-library', 'divi-theme-builder', 'pods', 'wpfc'],
            self::registry()->ids()
        );
    }

-    /** Divi, Pods and WP Super Cache boot (hooks, orphan cleanup); a second boot registers nothing twice. */
+    /** Divi, Pods and WP Fastest Cache boot (hooks, orphan cleanup); a second boot registers nothing twice. */
    public function testTheBootableIntegrationsBootExactlyOnce(): void
    {
        Actions\expectAdded('upgrader_process_complete')->once();
        Actions\expectAdded('lit_mcp_compat_changed')->once();
        Filters\expectAdded(SettingsPage::TABS_FILTER)->never();
-        Actions\expectAdded(CompatibilityTab::LOAD_ACTION)->times(3); // Divi, Pods and WP Super Cache
+        Actions\expectAdded(CompatibilityTab::LOAD_ACTION)->times(3); // Divi, Pods and WP Fastest Cache
        Actions\expectAdded(CompatibilityTab::EXTRA_ACTION)->once();
        Filters\expectAdded(CompatibilityTab::COLUMNS_FILTER)->once();
        $registry = self::registry();
@@ -97,17 +97,17 @@ final class PluginTest extends TestCase
        self::assertArrayNotHasKey('pods', $registry->grouped());
    }

-    /** WP Super Cache is registered with its profile; its tool group appears only while the plugin is loaded. */
-    public function testSuperCacheIsRegisteredAndNoToolGroupWithoutTheCachePlugin(): void
+    /** WP Fastest Cache is registered with its profile; its tool group appears only while the plugin is loaded. */
+    public function testFastestCacheIsRegisteredAndNoToolGroupWithoutTheCachePlugin(): void
    {
        $registry = self::registry();

-        self::assertContains('wpsc', $registry->ids());
-        self::assertArrayNotHasKey('wpsc', $registry->grouped());
+        self::assertContains('wpfc', $registry->ids());
+        self::assertArrayNotHasKey('wpfc', $registry->grouped());
    }

    /**
-     * The purger of the real wiring asks the registry's Compatibility at call time: with WP Super Cache loaded and
+     * The purger of the real wiring asks the registry's Compatibility at call time: with WP Fastest Cache loaded and
     * its manifest met, the whole-cache purge runs (a registry captured by value would still be null: always locked).
     *
     * @runInSeparateProcess
@@ -115,33 +115,34 @@ final class PluginTest extends TestCase
     */
    public function testTheWiredPurgerAsksTheCompatibilityOfTheRegistry(): void
    {
-        define('WPCACHEHOME', '/plugins/wp-super-cache/');
-        eval('function wp_cache_post_edit($id) { $GLOBALS["wpsc_calls"][] = "post:" . $id; }'
-            . 'function wp_cache_clear_cache($blog = 0) { $GLOBALS["wpsc_calls"][] = "all:" . $blog; }');
-        $GLOBALS['wpsc_calls'] = [];
-        $GLOBALS['cache_path'] = '/cache/';
-        $GLOBALS['blog_cache_dir'] = '/cache/blogs/';
-        $GLOBALS['cache_enabled'] = true;
-        Functions\when('get_file_data')->justReturn(['Version' => '3.1.5']);
+        define('WPFC_MAIN_PATH', '/plugins/wp-fastest-cache/');
+        eval('function wpfc_clear_post_cache_by_id($id = false) { $GLOBALS["wpfc_calls"][] = "post:" . $id; }'
+            . 'function wpfc_clear_all_cache($minified = false) { $GLOBALS["wpfc_calls"][] = "all"; }'
+            . 'class WpFastestCache { public function singleDeleteCache($c = false, $p = false, $parents = true) {}'
+            . ' public function getWpContentDir($path = false) { return ""; } }');
+        $GLOBALS['wpfc_calls'] = [];
+        $GLOBALS['wp_fastest_cache'] = new \WpFastestCache();
+        $GLOBALS['wp_fastest_cache_options'] = (object) ['wpFastestCacheStatus' => 'on'];
+        Functions\when('get_file_data')->justReturn(['Version' => '1.5.5']);
        Functions\when('get_option')->justReturn(false);
        Functions\when('get_transient')->justReturn(false);
        Functions\when('set_transient')->justReturn(true);
        Functions\when('is_multisite')->justReturn(false);
        Functions\when('current_user_can')->justReturn(true);
        $integrations = (new ReflectionProperty(IntegrationRegistry::class, 'integrations'))->getValue(self::registry(log: new FakeChangeLog(1)));
-        $wpsc = array_values(array_filter(
+        $wpfc = array_values(array_filter(
            $integrations,
-            static fn ($integration): bool => $integration->id() === 'wpsc'
+            static fn ($integration): bool => $integration->id() === 'wpfc'
        ))[0];

-        $result = $wpsc->abilities()[0]->execute(['scope' => 'all', 'confirm' => true]);
+        $result = $wpfc->abilities()[0]->execute(['scope' => 'all', 'confirm' => true]);

        self::assertSame('purged', $result['outcome']);
-        self::assertSame(['all:0'], $GLOBALS['wpsc_calls']);
+        self::assertSame(['all'], $GLOBALS['wpfc_calls']);
    }

-    /** lit-site-status keeps its order: Divi, Pods, WP Super Cache, The Events Calendar. */
-    public function testSiteStatusListsDiviPodsSuperCacheAndTheEventsCalendarInThatOrder(): void
+    /** lit-site-status keeps its order: Divi, Pods, WP Fastest Cache, The Events Calendar. */
+    public function testSiteStatusListsDiviPodsFastestCacheAndTheEventsCalendarInThatOrder(): void
    {
        Functions\when('get_bloginfo')->justReturn('x');
        Functions\when('home_url')->justReturn('https://example.test');
@@ -158,13 +159,13 @@ final class PluginTest extends TestCase

        $components = $status->execute([])['components'];

-        self::assertSame(['divi', 'pods', 'wpsc', 'the-events-calendar'], array_column($components, 'id'));
+        self::assertSame(['divi', 'pods', 'wpfc', 'the-events-calendar'], array_column($components, 'id'));
        $pods = array_column($components, null, 'id')['pods'];
        self::assertFalse($pods['active'], 'no Pods in unit tests');
        self::assertSame([], $pods['problems']);
-        $wpsc = array_column($components, null, 'id')['wpsc'];
-        self::assertFalse($wpsc['active'], 'no WP Super Cache in unit tests');
-        self::assertSame([], $wpsc['problems']);
+        $wpfc = array_column($components, null, 'id')['wpfc'];
+        self::assertFalse($wpfc['active'], 'no WP Fastest Cache in unit tests');
+        self::assertSame([], $wpfc['problems']);
    }

    public function testTheCompatibilityCoversAllProfilesWithoutIdCollision(): void
@@ -172,9 +173,9 @@ final class PluginTest extends TestCase
        $compat = self::registry()->compatibility();

        $ids = array_map(static fn (Profile $p): string => $p->id, $compat->profiles());
-        self::assertSame(['divi', 'pods', 'wpsc'], $ids);
+        self::assertSame(['divi', 'pods', 'wpfc'], $ids);
        self::assertSame($ids, array_values(array_unique($ids)));
-        self::assertSame('wpsc', $compat->owner($compat->capability('wpsc-purge-all'))?->id);
+        self::assertSame('wpfc', $compat->owner($compat->capability('wpfc-purge-all'))?->id);
        self::assertNotNull($compat->capability('page-write'));
        self::assertNotNull($compat->capability('pods-field-read'));
        self::assertSame('divi', $compat->owner($compat->capability('page-write'))?->id);
@@ -12,7 +12,7 @@ use LIT\MCP\Admin\ConnectionStatus;
 use LIT\MCP\ChangeLog\ChangeLogCleanup;
 use LIT\MCP\ChangeLog\ChangeLogInstaller;
 use LIT\MCP\Integrations\Divi\Release\ReleaseResolver;
-use LIT\MCP\Integrations\SuperCache\SuperCacheListener;
+use LIT\MCP\Integrations\FastestCache\FastestCacheListener;
 use LIT\MCP\Limits;
 use LIT\MCP\Updater\RecheckOnInstall;
 use Mockery;
@@ -60,7 +60,7 @@ final class UninstallTest extends TestCase
            Access::OPTION, ExposurePolicy::OPTION, Limits::OPTION, ChangeLogInstaller::VERSION_OPTION,
            'lit_mcp_divi_releases', 'lit_mcp_divi_check_report', 'lit_mcp_divi_check_lock',
            'lit_mcp_pods_releases', 'lit_mcp_pods_check_report', 'lit_mcp_pods_check_lock',
-            'lit_mcp_wpsc_releases', 'lit_mcp_wpsc_check_report', 'lit_mcp_wpsc_check_lock',
+            'lit_mcp_wpfc_releases', 'lit_mcp_wpfc_check_report', 'lit_mcp_wpfc_check_lock',
            'lit_mcp_snapshots_colors', 'lit_mcp_snapshots_variables', 'lit_mcp_snapshots_presets',
            'lit_mcp_snapshots_theme_options', 'lit_mcp_snapshots_custom_css',
            DesignLock::option('colors'), DesignLock::option('variables'), DesignLock::option('presets'), DesignLock::option('custom_css'),
@@ -73,15 +73,15 @@ final class UninstallTest extends TestCase
        self::assertNotContains('wpmedia_mcp_oauth_rewrite_version', $deleted);
        self::assertSame(
            [
-                ConnectionStatus::ENDPOINT_TRANSIENT, ReleaseResolver::CACHE, SuperCacheListener::PURGED_AT,
-                ConnectionStatus::ENDPOINT_TRANSIENT, ReleaseResolver::CACHE, SuperCacheListener::PURGED_AT,
+                ConnectionStatus::ENDPOINT_TRANSIENT, ReleaseResolver::CACHE, FastestCacheListener::PURGED_AT,
+                ConnectionStatus::ENDPOINT_TRANSIENT, ReleaseResolver::CACHE, FastestCacheListener::PURGED_AT,
            ],
            $transients
        );
        self::assertSame(
            [
-                ChangeLogCleanup::HOOK, SuperCacheListener::TRAILING_HOOK,
-                ChangeLogCleanup::HOOK, SuperCacheListener::TRAILING_HOOK,
+                ChangeLogCleanup::HOOK, FastestCacheListener::TRAILING_HOOK,
+                ChangeLogCleanup::HOOK, FastestCacheListener::TRAILING_HOOK,
            ],
            $hooks
        );
@@ -13,7 +13,7 @@ use LIT\MCP\Admin\LogTab;
 use LIT\MCP\ChangeLog\ChangeLogCleanup;
 use LIT\MCP\ChangeLog\ChangeLogInstaller;
 use LIT\MCP\Integrations\Divi\Release\ReleaseResolver;
-use LIT\MCP\Integrations\SuperCache\SuperCacheListener;
+use LIT\MCP\Integrations\FastestCache\FastestCacheListener;
 use LIT\MCP\Limits;
 use LIT\MCP\Uninstaller;
 use LIT\MCP\Updater\RecheckOnInstall;
@@ -61,16 +61,16 @@ final class UninstallerTest extends TestCase
        Uninstaller::run();

        self::assertSame(
-            [ConnectionStatus::ENDPOINT_TRANSIENT, ReleaseResolver::CACHE, SuperCacheListener::PURGED_AT],
+            [ConnectionStatus::ENDPOINT_TRANSIENT, ReleaseResolver::CACHE, FastestCacheListener::PURGED_AT],
            $transients
        );
-        self::assertSame([ChangeLogCleanup::HOOK, SuperCacheListener::TRAILING_HOOK], $hooks);
+        self::assertSame([ChangeLogCleanup::HOOK, FastestCacheListener::TRAILING_HOOK], $hooks);
        self::assertSame(
            [
                Access::OPTION, ExposurePolicy::OPTION, Limits::OPTION, ChangeLogInstaller::VERSION_OPTION,
                'lit_mcp_divi_releases', 'lit_mcp_divi_check_report', 'lit_mcp_divi_check_lock',
            'lit_mcp_pods_releases', 'lit_mcp_pods_check_report', 'lit_mcp_pods_check_lock',
-                'lit_mcp_wpsc_releases', 'lit_mcp_wpsc_check_report', 'lit_mcp_wpsc_check_lock',
+                'lit_mcp_wpfc_releases', 'lit_mcp_wpfc_check_report', 'lit_mcp_wpfc_check_lock',
                'lit_mcp_snapshots_colors', 'lit_mcp_snapshots_variables', 'lit_mcp_snapshots_presets',
                'lit_mcp_snapshots_theme_options', 'lit_mcp_snapshots_custom_css',
                DesignLock::option('colors'), DesignLock::option('variables'), DesignLock::option('presets'), DesignLock::option('custom_css'),
@@ -108,15 +108,15 @@ final class UninstallerTest extends TestCase

        self::assertSame(
            [
-                ConnectionStatus::ENDPOINT_TRANSIENT, ReleaseResolver::CACHE, SuperCacheListener::PURGED_AT,
-                ConnectionStatus::ENDPOINT_TRANSIENT, ReleaseResolver::CACHE, SuperCacheListener::PURGED_AT,
+                ConnectionStatus::ENDPOINT_TRANSIENT, ReleaseResolver::CACHE, FastestCacheListener::PURGED_AT,
+                ConnectionStatus::ENDPOINT_TRANSIENT, ReleaseResolver::CACHE, FastestCacheListener::PURGED_AT,
            ],
            $transients
        );
        self::assertSame(
            [
-                ChangeLogCleanup::HOOK, SuperCacheListener::TRAILING_HOOK,
-                ChangeLogCleanup::HOOK, SuperCacheListener::TRAILING_HOOK,
+                ChangeLogCleanup::HOOK, FastestCacheListener::TRAILING_HOOK,
+                ChangeLogCleanup::HOOK, FastestCacheListener::TRAILING_HOOK,
            ],
            $hooks
        );