diff --git a/docs/guides/overview.md b/docs/guides/overview.md
index 0672ddb..c5e400f 100644
--- a/docs/guides/overview.md
+++ b/docs/guides/overview.md
@@ -98,3 +98,8 @@ nichts geändert. Vorgehen:
    nicht über andere Werkzeuge umgehen.
 5. Dasselbe gilt für Pods: Ist eine Pods-Fähigkeit (`pods-…`) nicht nutzbar, antwortet das betroffene Werkzeug mit
    `compat_incompatible`; der Stand steht im selben Reiter „Compatibility“.
+
+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. Ist der Cache
+dafür gesperrt, bleibt er unverändert; der Zustand steht im Reiter „Compatibility“ und in `lit-site-status`
+(`wpsc`).
diff --git a/src/Admin/CompatibilityTab.php b/src/Admin/CompatibilityTab.php
index 6dd73c5..f7cb2f7 100644
--- a/src/Admin/CompatibilityTab.php
+++ b/src/Admin/CompatibilityTab.php
@@ -50,6 +50,8 @@ final class CompatibilityTab implements AdminTab
     /** admin-post actions; the nonce action of a request is the action plus "_<profile ID>". */
     public const RELEASE_ACTION = 'lit_mcp_compat_release';
     public const WITHDRAW_ACTION = 'lit_mcp_compat_withdraw';
+    private const ABILITY_PREFIX = 'lit/';
+    private const ABILITY_SUFFIX = '-release';
 
     /** @var Closure(Profile): CheckReportStore */
     private Closure $reports;
@@ -71,6 +73,20 @@ final class CompatibilityTab implements AdminTab
         $this->releases = $releases ?? ReleaseStore::forProfile(...);
     }
 
+    /** Ability name of the release and withdraw entries in the change log: lit/<profile>-release. */
+    public static function releaseAbility(string $profileId): string
+    {
+        return self::ABILITY_PREFIX . $profileId . self::ABILITY_SUFFIX;
+    }
+
+    /** Whether the ability names such an entry (any profile). */
+    public static function isReleaseAbility(string $ability): bool
+    {
+        return strlen($ability) > strlen(self::ABILITY_PREFIX . self::ABILITY_SUFFIX)
+            && str_starts_with($ability, self::ABILITY_PREFIX)
+            && str_ends_with($ability, self::ABILITY_SUFFIX);
+    }
+
     public function slug(): string
     {
         return self::SLUG;
@@ -137,7 +153,7 @@ final class CompatibilityTab implements AdminTab
 
         ($this->releases)($profile)->add($version, Plugin::VERSION, get_current_user_id(), $report->id);
         $this->log?->record(
-            'lit/' . $profile->id . '-release',
+            self::releaseAbility($profile->id),
             $profile->id,
             $version,
             sprintf(
@@ -167,7 +183,7 @@ final class CompatibilityTab implements AdminTab
         }
 
         $this->log?->record(
-            'lit/' . $profile->id . '-release',
+            self::releaseAbility($profile->id),
             $profile->id,
             $version,
             sprintf('Freigabe von %s %s zurückgezogen.', $profile->label, $version)
diff --git a/src/Integrations/SuperCache/SuperCacheCompatibility.php b/src/Integrations/SuperCache/SuperCacheCompatibility.php
new file mode 100644
index 0000000..83eb5aa
--- /dev/null
+++ b/src/Integrations/SuperCache/SuperCacheCompatibility.php
@@ -0,0 +1,61 @@
+<?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).
+ */
+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']
+        );
+    }
+}
diff --git a/src/Integrations/SuperCache/SuperCacheFeature.php b/src/Integrations/SuperCache/SuperCacheFeature.php
new file mode 100644
index 0000000..3c99130
--- /dev/null
+++ b/src/Integrations/SuperCache/SuperCacheFeature.php
@@ -0,0 +1,37 @@
+<?php
+
+declare(strict_types=1);
+
+namespace LIT\MCP\Integrations\SuperCache;
+
+use LIT\MCP\Compatibility\Capability;
+
+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
+{
+    case PurgePost = 'wpsc-purge-post';
+    case PurgeAll = 'wpsc-purge-all';
+
+    public function id(): string
+    {
+        return $this->value;
+    }
+
+    public function label(): string
+    {
+        return match ($this) {
+            self::PurgePost => 'Cache eines Beitrags leeren',
+            self::PurgeAll => 'Gesamten Cache leeren',
+        };
+    }
+
+    public function isWrite(): bool
+    {
+        return true;
+    }
+}
diff --git a/src/Integrations/SuperCache/SuperCacheIntegration.php b/src/Integrations/SuperCache/SuperCacheIntegration.php
new file mode 100644
index 0000000..1af90e6
--- /dev/null
+++ b/src/Integrations/SuperCache/SuperCacheIntegration.php
@@ -0,0 +1,42 @@
+<?php
+
+declare(strict_types=1);
+
+namespace LIT\MCP\Integrations\SuperCache;
+
+use LIT\MCP\Compatibility\ProvidesCompatibility;
+use LIT\MCP\Integrations\Integration;
+
+defined('ABSPATH') || exit;
+
+/**
+ * WP Super Cache has no tools: the integration only brings the compatibility profile (SuperCacheListener does the
+ * work, wired by Plugin). Without abilities it is no tool group.
+ */
+final class SuperCacheIntegration implements Integration, ProvidesCompatibility
+{
+    public function id(): string
+    {
+        return 'wpsc';
+    }
+
+    public function label(): string
+    {
+        return SuperCacheCompatibility::LABEL;
+    }
+
+    public function isAvailable(): bool
+    {
+        return defined('WPCACHEHOME');
+    }
+
+    public function abilities(): array
+    {
+        return [];
+    }
+
+    public function compatibilities(): array
+    {
+        return [SuperCacheCompatibility::profile()];
+    }
+}
diff --git a/src/Integrations/SuperCache/SuperCacheListener.php b/src/Integrations/SuperCache/SuperCacheListener.php
new file mode 100644
index 0000000..1dfcb82
--- /dev/null
+++ b/src/Integrations/SuperCache/SuperCacheListener.php
@@ -0,0 +1,192 @@
+<?php
+
+declare(strict_types=1);
+
+namespace LIT\MCP\Integrations\SuperCache;
+
+use Closure;
+use LIT\MCP\Admin\CompatibilityTab;
+use LIT\MCP\ChangeLog\ChangeLog;
+use LIT\MCP\Compatibility\Compatibility;
+use LIT\MCP\Log;
+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.
+ *
+ * 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. Single-post purges are never throttled. The release/withdraw entries of the check workflow change
+ * nothing on the site and purge nothing.
+ */
+final class SuperCacheListener
+{
+    public const TRAILING_HOOK = 'lit_mcp_wpsc_trailing_purge';
+    /** Transient with the time of the last whole-cache purge (also in Uninstaller). */
+    public const PURGED_AT = 'lit_mcp_wpsc_purged_at';
+    /** Seconds between two whole-cache purges. */
+    private const THROTTLE = 30;
+
+    private Closure $usable;
+    private Closure $cacheEnabled;
+    private Closure $purgePost;
+    private Closure $purgeAll;
+    private Closure $postIdFor;
+    /** @var array<int, true> posts changed in this request */
+    private array $posts = [];
+    private bool $everything = false;
+    private bool $queued = false;
+    private bool $warned = false;
+
+    /**
+     * Defaults are the real WPSC 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(string, string): ?int)|null    $postIdFor    Post ID if objectType/objectId name an existing
+     *                                                              post of a public type but attachment.
+     */
+    public function __construct(
+        Closure $usable,
+        ?Closure $cacheEnabled = null,
+        ?Closure $purgePost = null,
+        ?Closure $purgeAll = null,
+        ?Closure $postIdFor = null
+    ) {
+        $this->usable = $usable;
+        $this->cacheEnabled = $cacheEnabled ?? static fn (): bool => ! empty($GLOBALS['cache_enabled']);
+        $this->purgePost = $purgePost ?? static function (int $id): void {
+            wp_cache_post_edit($id);
+        };
+        $this->purgeAll = $purgeAll ?? static function (int $blog): void {
+            wp_cache_clear_cache($blog);
+        };
+        $this->postIdFor = $postIdFor ?? self::publicPostId(...);
+    }
+
+    public static function create(Compatibility $compatibility): self
+    {
+        return new self($compatibility->usable(...));
+    }
+
+    public function register(): void
+    {
+        add_action(ChangeLog::CHANGED_ACTION, [$this, 'onChange'], 10, 4);
+        add_action(self::TRAILING_HOOK, [$this, 'trailingPurge']);
+    }
+
+    /** lit_mcp_changed: only collects, see flush(). Never throws. */
+    public function onChange(string $ability, string $objectType, string $objectId, ?int $logId = null): void
+    {
+        try {
+            if (CompatibilityTab::isReleaseAbility($ability) || ! ($this->cacheEnabled)()) {
+                return;
+            }
+
+            $postId = ($this->postIdFor)($objectType, $objectId);
+            if ($postId === null) {
+                $this->everything = true;
+            } else {
+                $this->posts[$postId] = true;
+            }
+            if (! $this->queued) {
+                $this->queued = true;
+                add_action('shutdown', [$this, 'flush']);
+            }
+        } catch (Throwable $e) {
+            Log::failure('WP Super Cache purge', $e);
+        }
+    }
+
+    /** shutdown: the one purge of the request. Never throws: a failed purge must not break the response. */
+    public function flush(): void
+    {
+        $posts = array_keys($this->posts);
+        $everything = $this->everything;
+        $this->posts = [];
+        $this->everything = false;
+
+        try {
+            if ($everything || count($posts) > 1) {
+                $this->purgeEverything();
+            } elseif ($posts !== []) {
+                $this->purge(SuperCacheFeature::PurgePost, fn () => ($this->purgePost)($posts[0]));
+            }
+        } catch (Throwable $e) {
+            Log::failure('WP Super Cache purge', $e);
+        }
+    }
+
+    /** Cron TRAILING_HOOK: the whole-cache purge a throttled one postponed. Same checks as the first try. */
+    public function trailingPurge(): void
+    {
+        try {
+            if (($this->cacheEnabled)()) {
+                $this->purgeEverything();
+            }
+        } catch (Throwable $e) {
+            Log::failure('WP Super Cache trailing purge', $e);
+        }
+    }
+
+    /**
+     * 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).
+     */
+    private function purgeEverything(): void
+    {
+        $this->purge(SuperCacheFeature::PurgeAll, function (): void {
+            $last = get_transient(self::PURGED_AT);
+            // Transients in the options table come back as strings.
+            if (is_numeric($last) && time() - (int) $last < self::THROTTLE) {
+                if (wp_next_scheduled(self::TRAILING_HOOK) === false) {
+                    wp_schedule_single_event((int) $last + self::THROTTLE, self::TRAILING_HOOK);
+                }
+
+                return;
+            }
+
+            // Known and unavoidable on a multisite: WPSC also empties the shared blogs/ meta directory of all sites
+            // in its blog branch (wp-cache-phase2.php, wp_cache_clear_cache).
+            ($this->purgeAll)(is_multisite() ? get_current_blog_id() : 0);
+            set_transient(self::PURGED_AT, time(), self::THROTTLE);
+        });
+    }
+
+    /** @param Closure(): void $purge */
+    private function purge(SuperCacheFeature $feature, Closure $purge): void
+    {
+        if (! ($this->usable)($feature)) {
+            if (! $this->warned) {
+                $this->warned = true;
+                Log::line(sprintf('WP Super Cache not purged: %s not usable (see tab Compatibility)', $feature->id()));
+            }
+
+            return;
+        }
+
+        $purge();
+    }
+
+    private static function publicPostId(string $objectType, string $objectId): ?int
+    {
+        if ($objectType === 'attachment' || ! ctype_digit($objectId)) {
+            return null;
+        }
+        $type = get_post_type_object($objectType);
+        if ($type === null || empty($type->public)) {
+            return null;
+        }
+
+        return get_post((int) $objectId) instanceof \WP_Post ? (int) $objectId : null;
+    }
+}
diff --git a/src/Plugin.php b/src/Plugin.php
index ed2202d..3414a0d 100644
--- a/src/Plugin.php
+++ b/src/Plugin.php
@@ -37,6 +37,8 @@ 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\SuperCacheIntegration;
+use LIT\MCP\Integrations\SuperCache\SuperCacheListener;
 use LIT\MCP\Integrations\WordPress\Schema\ContentSchema;
 use LIT\MCP\Integrations\WordPress\Schema\FieldSource;
 use LIT\MCP\Integrations\WordPress\Schema\RegisteredMetaSource;
@@ -96,6 +98,8 @@ 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();
         // The admin check of every compatibility profile (POST lit-mcp/v1/<id>-check), REST like the MCP calls.
         (new CheckRoute($registry->compatibility()))->register();
 
@@ -209,7 +213,8 @@ final class Plugin
             $divi,
             $divi->library(),
             $divi->themeBuilder(),
-            new PodsIntegration()
+            new PodsIntegration(),
+            new SuperCacheIntegration()
         );
 
         return $registry;
diff --git a/src/Uninstaller.php b/src/Uninstaller.php
index ad8a591..ebb25e0 100644
--- a/src/Uninstaller.php
+++ b/src/Uninstaller.php
@@ -19,10 +19,12 @@ 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 and pods (an explicit list: a LIKE pattern could hit foreign options),
+ * profiles divi, pods and wpsc (an explicit list: a LIKE pattern could hit foreign options),
  * Integrations\Divi\Design\DesignLock::option(), Admin\ConnectionStatus::ENDPOINT_TRANSIENT,
  * Integrations\Divi\Release\ReleaseResolver::CACHE,
- * ChangeLog\ChangeLogCleanup::HOOK, ChangeLog\ChangeLog::TABLE, Admin\LogTab::PER_PAGE_OPTION and
+ * Integrations\SuperCache\SuperCacheListener::PURGED_AT (transient),
+ * ChangeLog\ChangeLogCleanup::HOOK, Integrations\SuperCache\SuperCacheListener::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
  * those constants.
@@ -38,6 +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_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',
@@ -45,8 +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'];
-    private const CRON_HOOK = 'lit_mcp_log_cleanup';
+    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 TABLE = 'lit_mcp_log';
 
     /** Screen option "Einträge pro Seite" of the Protokoll tab (Admin\LogTab::PER_PAGE_OPTION): user meta. */
@@ -80,7 +83,9 @@ final class Uninstaller
         foreach (self::TRANSIENTS as $transient) {
             delete_transient($transient);
         }
-        wp_clear_scheduled_hook(self::CRON_HOOK);
+        foreach (self::CRON_HOOKS as $hook) {
+            wp_clear_scheduled_hook($hook);
+        }
 
         $table = $wpdb->prefix . self::TABLE;
         // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared -- own table name, not user input.
diff --git a/tests/Unit/Admin/CompatibilityTabTest.php b/tests/Unit/Admin/CompatibilityTabTest.php
index 6efb7e3..ab25d06 100644
--- a/tests/Unit/Admin/CompatibilityTabTest.php
+++ b/tests/Unit/Admin/CompatibilityTabTest.php
@@ -165,6 +165,16 @@ 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). */
+    public function testTheReleaseAbilityNameHasOneSource(): void
+    {
+        self::assertSame('lit/divi-release', CompatibilityTab::releaseAbility('divi'));
+        self::assertTrue(CompatibilityTab::isReleaseAbility(CompatibilityTab::releaseAbility('wpsc')));
+        foreach (['lit/content-update', 'lit/-release', 'lit/release', 'lit/divi-releases'] as $other) {
+            self::assertFalse(CompatibilityTab::isReleaseAbility($other), $other);
+        }
+    }
+
     public function testItIsTheTabCompatibility(): void
     {
         $tab = $this->tab(self::profile());
diff --git a/tests/Unit/Integrations/SuperCache/SuperCacheCompatibilityTest.php b/tests/Unit/Integrations/SuperCache/SuperCacheCompatibilityTest.php
new file mode 100644
index 0000000..4b31b82
--- /dev/null
+++ b/tests/Unit/Integrations/SuperCache/SuperCacheCompatibilityTest.php
@@ -0,0 +1,104 @@
+<?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\Compatibility;
+use LIT\MCP\Compatibility\Tier;
+use LIT\MCP\Integrations\Divi\Release\DiviProfile;
+use LIT\MCP\Integrations\Pods\PodsCompatibility;
+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 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'));
+    }
+}
diff --git a/tests/Unit/Integrations/SuperCache/SuperCacheFeatureTest.php b/tests/Unit/Integrations/SuperCache/SuperCacheFeatureTest.php
new file mode 100644
index 0000000..a090529
--- /dev/null
+++ b/tests/Unit/Integrations/SuperCache/SuperCacheFeatureTest.php
@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace LIT\MCP\Tests\Unit\Integrations\SuperCache;
+
+use LIT\MCP\Compatibility\Capability;
+use LIT\MCP\Integrations\SuperCache\SuperCacheFeature;
+use LIT\MCP\Tests\Unit\TestCase;
+
+final class SuperCacheFeatureTest extends TestCase
+{
+    public function testEveryFeatureIsAWritingCapabilityWithAPrefixedId(): void
+    {
+        foreach (SuperCacheFeature::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())
+        );
+    }
+}
diff --git a/tests/Unit/Integrations/SuperCache/SuperCacheIntegrationTest.php b/tests/Unit/Integrations/SuperCache/SuperCacheIntegrationTest.php
new file mode 100644
index 0000000..f3f5850
--- /dev/null
+++ b/tests/Unit/Integrations/SuperCache/SuperCacheIntegrationTest.php
@@ -0,0 +1,31 @@
+<?php
+
+declare(strict_types=1);
+
+namespace LIT\MCP\Tests\Unit\Integrations\SuperCache;
+
+use LIT\MCP\Compatibility\ProvidesCompatibility;
+use LIT\MCP\Integrations\Integration;
+use LIT\MCP\Integrations\SuperCache\SuperCacheCompatibility;
+use LIT\MCP\Integrations\SuperCache\SuperCacheIntegration;
+use LIT\MCP\Tests\Unit\TestCase;
+
+final class SuperCacheIntegrationTest extends TestCase
+{
+    public function testIsAnIntegrationWithoutAbilitiesThatProvidesItsProfile(): void
+    {
+        $integration = new SuperCacheIntegration();
+
+        self::assertInstanceOf(Integration::class, $integration);
+        self::assertInstanceOf(ProvidesCompatibility::class, $integration);
+        self::assertSame('wpsc', $integration->id());
+        self::assertSame('WP Super Cache', $integration->label());
+        self::assertSame([], $integration->abilities());
+        self::assertEquals([SuperCacheCompatibility::profile()], $integration->compatibilities());
+    }
+
+    public function testIsAvailableOnlyWithSuperCache(): void
+    {
+        self::assertSame(defined('WPCACHEHOME'), (new SuperCacheIntegration())->isAvailable());
+    }
+}
diff --git a/tests/Unit/Integrations/SuperCache/SuperCacheListenerTest.php b/tests/Unit/Integrations/SuperCache/SuperCacheListenerTest.php
new file mode 100644
index 0000000..2cdd81a
--- /dev/null
+++ b/tests/Unit/Integrations/SuperCache/SuperCacheListenerTest.php
@@ -0,0 +1,450 @@
+<?php
+
+declare(strict_types=1);
+
+namespace LIT\MCP\Tests\Unit\Integrations\SuperCache;
+
+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\Tests\Unit\TestCase;
+use WP_Post;
+
+final class SuperCacheListenerTest extends TestCase
+{
+    /** @var list<string> */
+    private array $purges = [];
+    private string $errorLog = '';
+    private string|false $previousErrorLog = false;
+    /** @var list<array{int, string}> wp_schedule_single_event calls: [timestamp, hook] */
+    private array $scheduled = [];
+    /** @var list<array{string, int, int}> set_transient calls */
+    private array $stamped = [];
+    private int|string|false $lastPurge = false;
+    private int|false $planned = false;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $this->purges = [];
+        $this->scheduled = [];
+        $this->stamped = [];
+        $this->lastPurge = false;
+        $this->planned = false;
+        Functions\when('is_multisite')->justReturn(false);
+        Functions\when('get_transient')->alias(fn (): int|string|false => $this->lastPurge);
+        Functions\when('set_transient')->alias(function (string $key, int $value, int $ttl): bool {
+            $this->stamped[] = [$key, $value, $ttl];
+
+            return true;
+        });
+        Functions\when('wp_next_scheduled')->alias(fn (): int|false => $this->planned);
+        Functions\when('wp_schedule_single_event')->alias(function (int $at, string $hook): bool {
+            $this->scheduled[] = [$at, $hook];
+
+            return true;
+        });
+        $this->errorLog = (string) tempnam(sys_get_temp_dir(), 'lit-mcp-log');
+        $this->previousErrorLog = ini_set('error_log', $this->errorLog);
+    }
+
+    protected function tearDown(): void
+    {
+        ini_set('error_log', (string) $this->previousErrorLog);
+        unlink($this->errorLog);
+        unset($GLOBALS['cache_enabled']);
+        parent::tearDown();
+    }
+
+    /** @param (Closure(string, string): ?int)|null $postIdFor */
+    private function listener(
+        bool $cacheOn = true,
+        bool $usablePost = true,
+        bool $usableAll = true,
+        ?Closure $postIdFor = null
+    ): SuperCacheListener {
+        return new SuperCacheListener(
+            static fn (SuperCacheFeature $feature): bool => $feature === SuperCacheFeature::PurgePost
+                ? $usablePost
+                : $usableAll,
+            static fn (): bool => $cacheOn,
+            function (int $id): void {
+                $this->purges[] = 'post:' . $id;
+            },
+            function (int $blog): void {
+                $this->purges[] = 'all:' . $blog;
+            },
+            $postIdFor ?? static fn (string $type, string $id): ?int => in_array($type, ['page', 'post'], true)
+                ? (int) $id
+                : null
+        );
+    }
+
+    private function logged(): string
+    {
+        return (string) file_get_contents($this->errorLog);
+    }
+
+    /** Collect, do not purge: the purge runs once at the end of the request. */
+    public function testAPublicPostPurgesOnlyThatPostAtTheEndOfTheRequest(): void
+    {
+        $listener = $this->listener();
+        $listener->onChange('lit/content-update', 'page', '12', 5);
+        self::assertSame([], $this->purges);
+
+        $listener->flush();
+
+        self::assertSame(['post:12'], $this->purges);
+    }
+
+    public function testTheSamePostTwiceIsOnePostPurge(): void
+    {
+        $listener = $this->listener();
+        $listener->onChange('lit/content-update', 'page', '12', 5);
+        $listener->onChange('lit/content-update', 'page', '12', 6);
+        $listener->flush();
+
+        self::assertSame(['post:12'], $this->purges);
+    }
+
+    /** More than one post: one whole-cache purge instead of N single ones (loops over many pages). */
+    public function testMoreThanOnePostIsOneWholeCachePurge(): void
+    {
+        $listener = $this->listener();
+        $listener->onChange('lit/content-update', 'page', '12', 5);
+        $listener->onChange('lit/content-update', 'page', '13', 6);
+        $listener->onChange('lit/content-update', 'post', '14', 7);
+        $listener->flush();
+
+        self::assertSame(['all:0'], $this->purges);
+    }
+
+    public function testThePurgeIsDoneOncePerFlush(): void
+    {
+        $listener = $this->listener();
+        $listener->onChange('lit/content-update', 'page', '12', 5);
+        $listener->flush();
+        $listener->flush();
+
+        self::assertSame(['post:12'], $this->purges);
+    }
+
+    public function testTheShutdownHookIsRegisteredOnceForManyChanges(): void
+    {
+        $listener = $this->listener();
+        $listener->onChange('lit/content-update', 'page', '12', 5);
+        $listener->onChange('lit/content-update', 'page', '13', 6);
+
+        self::assertSame(10, has_action('shutdown', [$listener, 'flush']));
+        $listener->flush();
+        $listener->onChange('lit/content-update', 'page', '14', 7);
+        $listener->flush();
+        self::assertSame(['all:0', 'post:14'], $this->purges);
+    }
+
+    /** @dataProvider siteWideChanges */
+    public function testEverythingElsePurgesTheWholeCache(string $ability, string $type, string $id): void
+    {
+        $listener = $this->listener();
+        $listener->onChange($ability, $type, $id, null);
+        $listener->flush();
+
+        self::assertSame(['all:0'], $this->purges);
+    }
+
+    /** @return array<string, array{string, string, string}> */
+    public static function siteWideChanges(): array
+    {
+        return [
+            'option' => ['lit/wp-settings-update', 'option', 'blogname'],
+            'menu' => ['lit/menu-set-items', 'nav_menu', '4'],
+            'menu location' => ['lit/menu-assign-location', 'menu_location', 'primary'],
+            'attachment' => ['lit/media-update', 'attachment', '31'],
+            'library module' => ['lit/library-save', 'et_pb_layout', '77'],
+            'divi design' => ['lit/divi-design-update', 'divi_design', 'colors'],
+        ];
+    }
+
+    public function testAPostThatIsGoneIsAWholeCachePurge(): void
+    {
+        $listener = $this->listener(postIdFor: static fn (): ?int => null);
+        $listener->onChange('lit/post-trash', 'post', '99', 1);
+        $listener->flush();
+
+        self::assertSame(['all:0'], $this->purges);
+    }
+
+    /** One whole-cache change among single posts: still one purge, no single ones on top. */
+    public function testAWholeCacheChangeSwallowsThePostPurges(): void
+    {
+        $listener = $this->listener();
+        $listener->onChange('lit/content-update', 'page', '12', 1);
+        $listener->onChange('lit/wp-settings-update', 'option', 'a', 2);
+        $listener->flush();
+
+        self::assertSame(['all:0'], $this->purges);
+    }
+
+    /** Release and withdraw entries of the check workflow change nothing on the site (shared ability name). */
+    public function testReleaseEntriesOfTheCheckWorkflowPurgeNothing(): void
+    {
+        $listener = $this->listener();
+        $listener->onChange(CompatibilityTab::releaseAbility('divi'), 'divi', '5.0.0', 1);
+        $listener->onChange(CompatibilityTab::releaseAbility('pods'), 'pods', '3.3.9.2', 2);
+        $listener->flush();
+
+        self::assertSame([], $this->purges);
+    }
+
+    public function testNothingHappensWhileTheCacheIsOff(): void
+    {
+        $listener = $this->listener(cacheOn: false);
+        $listener->onChange('lit/content-update', 'page', '12', 5);
+        $listener->flush();
+
+        self::assertSame([], $this->purges);
+        self::assertSame('', $this->logged());
+        self::assertFalse(has_action('shutdown', [$listener, 'flush']));
+    }
+
+    public function testALockedCapabilityPurgesNothingAndLogsOncePerRequest(): void
+    {
+        $listener = $this->listener(usablePost: false);
+
+        $listener->onChange('lit/content-update', 'page', '12', 5);
+        $listener->flush();
+        $listener->onChange('lit/content-update', 'page', '13', 6);
+        $listener->flush();
+
+        self::assertSame([], $this->purges);
+        self::assertSame(1, substr_count($this->logged(), 'wpsc-purge-post'));
+    }
+
+    /** The capabilities lock separately: a gone purge-post does not stop the whole-cache purge. */
+    public function testEachPurgeNeedsItsOwnCapability(): void
+    {
+        $listener = $this->listener(usablePost: false);
+
+        $listener->onChange('lit/wp-settings-update', 'option', 'blogname', 1);
+        $listener->flush();
+
+        self::assertSame(['all:0'], $this->purges);
+    }
+
+    public function testALockedWholeCachePurgeSchedulesNothing(): void
+    {
+        $this->lastPurge = time() - 5;
+        $listener = $this->listener(usableAll: false);
+        $listener->onChange('lit/wp-settings-update', 'option', 'blogname', 1);
+        $listener->flush();
+
+        self::assertSame([], $this->purges);
+        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();
+        $listener->onChange('lit/wp-settings-update', 'option', 'blogname', 1);
+        $listener->flush();
+
+        self::assertCount(1, $this->stamped);
+        self::assertSame('lit_mcp_wpsc_purged_at', $this->stamped[0][0]);
+        self::assertEqualsWithDelta(time(), $this->stamped[0][1], 2);
+        self::assertSame(30, $this->stamped[0][2]);
+    }
+
+    /** Single-post purges are never throttled and leave no stamp. */
+    public function testPostPurgesAreNotThrottled(): void
+    {
+        $this->lastPurge = time() - 1;
+        $listener = $this->listener();
+        $listener->onChange('lit/content-update', 'page', '12', 5);
+        $listener->flush();
+
+        self::assertSame(['post:12'], $this->purges);
+        self::assertSame([], $this->stamped);
+        self::assertSame([], $this->scheduled);
+    }
+
+    /** Inside the lock time: no purge now, exactly one trailing purge at the end of the lock time. */
+    public function testAWholeCachePurgeInsideTheLockTimeSchedulesOneTrailingPurge(): void
+    {
+        $this->lastPurge = time() - 10;
+        $listener = $this->listener();
+        $listener->onChange('lit/wp-settings-update', 'option', 'blogname', 1);
+        $listener->flush();
+
+        self::assertSame([], $this->purges);
+        self::assertSame([], $this->stamped);
+        self::assertSame([[$this->lastPurge + 30, 'lit_mcp_wpsc_trailing_purge']], $this->scheduled);
+    }
+
+    /** Options-table transients come back as strings. */
+    public function testAStringStampFromTheDatabaseThrottlesToo(): void
+    {
+        $this->lastPurge = (string) (time() - 10);
+        $listener = $this->listener();
+        $listener->onChange('lit/wp-settings-update', 'option', 'blogname', 1);
+        $listener->flush();
+
+        self::assertSame([], $this->purges);
+        self::assertCount(1, $this->scheduled);
+    }
+
+    public function testNoSecondTrailingPurgeIsScheduledWhileOneIsPlanned(): void
+    {
+        $this->lastPurge = time() - 10;
+        $this->planned = time() + 20;
+        $listener = $this->listener();
+        $listener->onChange('lit/wp-settings-update', 'option', 'blogname', 1);
+        $listener->flush();
+
+        self::assertSame([], $this->scheduled);
+        self::assertSame([], $this->purges);
+    }
+
+    public function testTheTrailingPurgeEmptiesTheWholeCache(): void
+    {
+        $listener = $this->listener();
+        $listener->trailingPurge();
+
+        self::assertSame(['all:0'], $this->purges);
+        self::assertCount(1, $this->stamped);
+    }
+
+    public function testTheTrailingPurgeKeepsTheChecks(): void
+    {
+        $this->listener(cacheOn: false)->trailingPurge();
+        $this->listener(usableAll: false)->trailingPurge();
+
+        self::assertSame([], $this->purges);
+    }
+
+    public function testAThrowingTrailingPurgeIsLogged(): void
+    {
+        $listener = new SuperCacheListener(
+            static fn (): bool => true,
+            static fn (): bool => true,
+            null,
+            static function (): void {
+                throw new \RuntimeException('trailing broke');
+            }
+        );
+
+        $listener->trailingPurge();
+
+        self::assertStringContainsString('trailing broke', $this->logged());
+    }
+
+    public function testAThrowingPurgeIsLoggedAndNotRethrown(): void
+    {
+        $listener = new SuperCacheListener(
+            static fn (): bool => true,
+            static fn (): bool => true,
+            static function (): void {
+                throw new \RuntimeException('disk full');
+            },
+            static fn (int $blog): null => null,
+            static fn (): int => 12
+        );
+
+        $listener->onChange('lit/content-update', 'page', '12', 5);
+        $listener->flush();
+
+        self::assertStringContainsString('disk full', $this->logged());
+    }
+
+    public function testRegisterHooksTheChangeAnnouncementAndTheTrailingPurge(): void
+    {
+        $listener = $this->listener();
+        $listener->register();
+
+        self::assertSame(10, has_action('lit_mcp_changed', [$listener, 'onChange']));
+        self::assertSame(10, has_action('lit_mcp_wpsc_trailing_purge', [$listener, 'trailingPurge']));
+    }
+
+    /** Plugin wires create(): without WP Super 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);
+
+        $listener->onChange('lit/wp-settings-update', 'option', 'blogname', 1);
+        $listener->flush();
+        self::assertSame('', $this->logged());
+
+        $GLOBALS['cache_enabled'] = true;
+        $listener->onChange('lit/wp-settings-update', 'option', 'blogname', 1);
+        $listener->flush();
+        self::assertStringContainsString('wpsc-purge-all not usable', $this->logged());
+    }
+
+    public function testTheDefaultCacheSwitchIsTheWpscGlobal(): 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);
+
+        $GLOBALS['cache_enabled'] = false;
+        $listener->onChange('lit/content-update', 'page', '12', 5);
+        $listener->flush();
+
+        self::assertSame('', $this->logged(), 'unset or false cache_enabled: silent, nothing purged');
+        self::assertFalse(has_action('shutdown', [$listener, 'flush']));
+    }
+
+    /** @dataProvider unpurgeablePosts */
+    public function testTheDefaultPostLookupAcceptsOnlyPublicPostTypesThatExist(
+        string $type,
+        string $id,
+        bool $public,
+        bool $exists
+    ): void {
+        $GLOBALS['cache_enabled'] = true;
+        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 {
+            $purged[] = 'all';
+        });
+        Functions\when('wp_cache_post_edit')->alias(static function () use (&$purged): void {
+            $purged[] = 'post';
+        });
+
+        $listener = new SuperCacheListener(static fn (): bool => true);
+        $listener->onChange('lit/x', $type, $id, 1);
+        $listener->flush();
+
+        self::assertSame([$public && $exists && $type !== 'attachment' && ctype_digit($id) ? 'post' : 'all'], $purged);
+    }
+
+    /** @return array<string, array{string, string, bool, bool}> */
+    public static function unpurgeablePosts(): array
+    {
+        return [
+            'public and present' => ['page', '12', true, true],
+            'not public' => ['et_pb_layout', '12', false, true],
+            'attachment' => ['attachment', '12', true, true],
+            'gone' => ['page', '12', true, false],
+            'id not numeric' => ['page', 'abc', true, true],
+        ];
+    }
+}
diff --git a/tests/Unit/PluginTest.php b/tests/Unit/PluginTest.php
index 41c92f6..860c6ad 100644
--- a/tests/Unit/PluginTest.php
+++ b/tests/Unit/PluginTest.php
@@ -48,7 +48,7 @@ final class PluginTest extends TestCase
     public function testIntegrationsInRegistryOrder(): void
     {
         self::assertSame(
-            ['core', 'wordpress', 'media', 'divi', 'divi-library', 'divi-theme-builder', 'pods'],
+            ['core', 'wordpress', 'media', 'divi', 'divi-library', 'divi-theme-builder', 'pods', 'wpsc'],
             self::registry()->ids()
         );
     }
@@ -95,8 +95,17 @@ final class PluginTest extends TestCase
         self::assertArrayNotHasKey('pods', $registry->grouped());
     }
 
-    /** lit-site-status keeps its order: Divi, Pods, The Events Calendar. */
-    public function testSiteStatusListsDiviPodsAndTheEventsCalendarInThatOrder(): void
+    /** WP Super Cache has no tools either: registered for its profile only. */
+    public function testSuperCacheIsRegisteredWithoutBecomingAToolGroup(): void
+    {
+        $registry = self::registry();
+
+        self::assertContains('wpsc', $registry->ids());
+        self::assertArrayNotHasKey('wpsc', $registry->grouped());
+    }
+
+    /** lit-site-status keeps its order: Divi, Pods, WP Super Cache, The Events Calendar. */
+    public function testSiteStatusListsDiviPodsSuperCacheAndTheEventsCalendarInThatOrder(): void
     {
         Functions\when('get_bloginfo')->justReturn('x');
         Functions\when('home_url')->justReturn('https://example.test');
@@ -113,17 +122,23 @@ final class PluginTest extends TestCase
 
         $components = $status->execute([])['components'];
 
-        self::assertSame(['divi', 'pods', 'the-events-calendar'], array_column($components, 'id'));
+        self::assertSame(['divi', 'pods', 'wpsc', 'the-events-calendar'], array_column($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']);
     }
 
     public function testTheCompatibilityCoversAllProfilesWithoutIdCollision(): void
     {
         $compat = self::registry()->compatibility();
 
-        self::assertSame(['divi', 'pods'], array_map(static fn (Profile $p): string => $p->id, $compat->profiles()));
+        $ids = array_map(static fn (Profile $p): string => $p->id, $compat->profiles());
+        self::assertSame(['divi', 'pods', 'wpsc'], $ids);
+        self::assertSame($ids, array_values(array_unique($ids)));
+        self::assertSame('wpsc', $compat->owner($compat->capability('wpsc-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);
diff --git a/tests/Unit/UninstallTest.php b/tests/Unit/UninstallTest.php
index 7394880..21bd0b2 100644
--- a/tests/Unit/UninstallTest.php
+++ b/tests/Unit/UninstallTest.php
@@ -12,6 +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\Limits;
 use LIT\MCP\Updater\RecheckOnInstall;
 use Mockery;
@@ -41,7 +42,11 @@ final class UninstallTest extends TestCase
             $transients[] = $transient;
             return true;
         });
-        Functions\expect('wp_clear_scheduled_hook')->twice()->with(ChangeLogCleanup::HOOK);
+        $hooks = [];
+        Functions\when('wp_clear_scheduled_hook')->alias(static function (string $hook) use (&$hooks): int {
+            $hooks[] = $hook;
+            return 0;
+        });
         Functions\expect('delete_metadata')->once()->with('user', 0, 'lit_mcp_log_per_page', '', true);
         $deleted = [];
         Functions\when('delete_option')->alias(static function (string $option) use (&$deleted): bool {
@@ -55,6 +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_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'),
@@ -67,10 +73,17 @@ final class UninstallTest extends TestCase
         self::assertNotContains('wpmedia_mcp_oauth_rewrite_version', $deleted);
         self::assertSame(
             [
-                ConnectionStatus::ENDPOINT_TRANSIENT, ReleaseResolver::CACHE,
-                ConnectionStatus::ENDPOINT_TRANSIENT, ReleaseResolver::CACHE,
+                ConnectionStatus::ENDPOINT_TRANSIENT, ReleaseResolver::CACHE, SuperCacheListener::PURGED_AT,
+                ConnectionStatus::ENDPOINT_TRANSIENT, ReleaseResolver::CACHE, SuperCacheListener::PURGED_AT,
             ],
             $transients
         );
+        self::assertSame(
+            [
+                ChangeLogCleanup::HOOK, SuperCacheListener::TRAILING_HOOK,
+                ChangeLogCleanup::HOOK, SuperCacheListener::TRAILING_HOOK,
+            ],
+            $hooks
+        );
     }
 }
diff --git a/tests/Unit/UninstallerTest.php b/tests/Unit/UninstallerTest.php
index 90d7cc8..bdf2d06 100644
--- a/tests/Unit/UninstallerTest.php
+++ b/tests/Unit/UninstallerTest.php
@@ -13,6 +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\Limits;
 use LIT\MCP\Uninstaller;
 use LIT\MCP\Updater\RecheckOnInstall;
@@ -44,7 +45,11 @@ final class UninstallerTest extends TestCase
             $transients[] = $transient;
             return true;
         });
-        Functions\expect('wp_clear_scheduled_hook')->once()->with(ChangeLogCleanup::HOOK);
+        $hooks = [];
+        Functions\when('wp_clear_scheduled_hook')->alias(static function (string $hook) use (&$hooks): int {
+            $hooks[] = $hook;
+            return 0;
+        });
         // Review m-8: the Protokoll screen option is user meta (network-wide): removed once.
         Functions\expect('delete_metadata')->once()->with('user', 0, LogTab::PER_PAGE_OPTION, '', true);
         $deleted = [];
@@ -55,12 +60,17 @@ final class UninstallerTest extends TestCase
 
         Uninstaller::run();
 
-        self::assertSame([ConnectionStatus::ENDPOINT_TRANSIENT, ReleaseResolver::CACHE], $transients);
+        self::assertSame(
+            [ConnectionStatus::ENDPOINT_TRANSIENT, ReleaseResolver::CACHE, SuperCacheListener::PURGED_AT],
+            $transients
+        );
+        self::assertSame([ChangeLogCleanup::HOOK, SuperCacheListener::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_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'),
@@ -86,7 +96,11 @@ final class UninstallerTest extends TestCase
             $transients[] = $transient;
             return true;
         });
-        Functions\expect('wp_clear_scheduled_hook')->twice()->with(ChangeLogCleanup::HOOK);
+        $hooks = [];
+        Functions\when('wp_clear_scheduled_hook')->alias(static function (string $hook) use (&$hooks): int {
+            $hooks[] = $hook;
+            return 0;
+        });
         Functions\expect('delete_metadata')->once()->with('user', 0, LogTab::PER_PAGE_OPTION, '', true);
         Functions\when('delete_option')->justReturn(true);
 
@@ -94,10 +108,17 @@ final class UninstallerTest extends TestCase
 
         self::assertSame(
             [
-                ConnectionStatus::ENDPOINT_TRANSIENT, ReleaseResolver::CACHE,
-                ConnectionStatus::ENDPOINT_TRANSIENT, ReleaseResolver::CACHE,
+                ConnectionStatus::ENDPOINT_TRANSIENT, ReleaseResolver::CACHE, SuperCacheListener::PURGED_AT,
+                ConnectionStatus::ENDPOINT_TRANSIENT, ReleaseResolver::CACHE, SuperCacheListener::PURGED_AT,
             ],
             $transients
         );
+        self::assertSame(
+            [
+                ChangeLogCleanup::HOOK, SuperCacheListener::TRAILING_HOOK,
+                ChangeLogCleanup::HOOK, SuperCacheListener::TRAILING_HOOK,
+            ],
+            $hooks
+        );
     }
 }