diff --git a/phpunit.xml b/phpunit.xml
index b0c0b77..93e8811 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -41,7 +41,9 @@
             <file>tests/Architecture/PublicPageAdminContractTest.php</file>
             <file>tests/Architecture/PublicPageRoutingContractTest.php</file>
             <file>tests/Architecture/SecurityCryptoContractTest.php</file>
-            <file>tests/Architecture/SecurityLoggingContractTest.php</file>
+            <file>tests/Architecture/SecurityLoggingRedactionContractTest.php</file>
+            <file>tests/Architecture/SecurityLoggingRuntimeContractTest.php</file>
+            <file>tests/Architecture/SecurityLoggingTelemetryContractTest.php</file>
         </testsuite>
         <testsuite name="ArchitectureUI">
             <file>tests/Architecture/AsideNavigationContractTest.php</file>
diff --git a/tests/Architecture/SecurityLoggingContractTest.php b/tests/Architecture/SecurityLoggingContractTest.php
deleted file mode 100644
index dc4dcc5..0000000
--- a/tests/Architecture/SecurityLoggingContractTest.php
+++ /dev/null
@@ -1,91 +0,0 @@
-<?php
-
-namespace MintyPHP\Tests\Architecture;
-
-use PHPUnit\Framework\TestCase;
-use RecursiveDirectoryIterator;
-use RecursiveIteratorIterator;
-
-/**
- * GR-SEC-002: No PII or secrets in error_log() calls.
- * Scans for error_log() calls that interpolate variables likely containing
- * personal data or credentials.
- */
-class SecurityLoggingContractTest extends TestCase
-{
-    use ProjectFileAssertionSupport;
-
-    /** Variable names that strongly suggest PII or secret content. */
-    private const PII_VARIABLE_PATTERNS = [
-        '/\$email\b/',
-        '/\$password\b/',
-        '/\$passwort\b/',
-        '/\$token\b/',
-        '/\$secret\b/',
-        '/\$apiKey\b/',
-        '/\$cryptoKey\b/',
-        '/\$creditCard\b/',
-        '/\$sessionId\b/',
-        '/\$firstName\b/',
-        '/\$lastName\b/',
-        '/\$phone\b/',
-        '/\$ssn\b/',
-    ];
-
-    public function testNoErrorLogCallsContainPiiVariables(): void
-    {
-        $root = $this->projectRootPath();
-        $violations = [];
-
-        foreach (['lib', 'pages'] as $dir) {
-            $basePath = $root . '/' . $dir;
-            $iterator = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($basePath));
-
-            /** @var \SplFileInfo $file */
-            foreach ($iterator as $file) {
-                if (!$file->isFile() || $file->getExtension() !== 'php') {
-                    continue;
-                }
-
-                $content = (string) file_get_contents($file->getPathname());
-                $relativePath = str_replace($root . '/', '', $file->getPathname());
-
-                if (preg_match_all('/^.*\berror_log\s*\(.*$/m', $content, $matches)) {
-                    foreach ($matches[0] as $line) {
-                        foreach (self::PII_VARIABLE_PATTERNS as $piiPattern) {
-                            if (preg_match($piiPattern, $line)) {
-                                $violations[] = $relativePath . ': ' . trim($line);
-                                break;
-                            }
-                        }
-                    }
-                }
-            }
-        }
-
-        sort($violations);
-
-        $this->assertSame(
-            [],
-            $violations,
-            "error_log() calls with potential PII variables (GR-SEC-002):\n" . implode("\n", $violations)
-        );
-    }
-
-    public function testErrorLogUsageIsMinimal(): void
-    {
-        $violations = array_merge(
-            $this->findPatternMatchesInPhpFiles('lib', '/\berror_log\s*\(/'),
-            $this->findPatternMatchesInPhpFiles('pages', '/\berror_log\s*\(/')
-        );
-        $violations = array_values(array_unique($violations));
-        sort($violations);
-
-        $this->assertLessThanOrEqual(
-            3,
-            count($violations),
-            "error_log() usage growing — consider structured logging (GR-SEC-002). Found in:\n"
-            . implode("\n", $violations)
-        );
-    }
-}
diff --git a/tests/Architecture/SecurityLoggingRedactionContractTest.php b/tests/Architecture/SecurityLoggingRedactionContractTest.php
new file mode 100644
index 0000000..28fae24
--- /dev/null
+++ b/tests/Architecture/SecurityLoggingRedactionContractTest.php
@@ -0,0 +1,63 @@
+<?php
+
+namespace MintyPHP\Tests\Architecture;
+
+use PHPUnit\Framework\TestCase;
+
+final class SecurityLoggingRedactionContractTest extends TestCase
+{
+    use ProjectFileAssertionSupport;
+
+    public function testSystemAuditRedactionCoversCredentialsTokensAndEmailFields(): void
+    {
+        $content = $this->readProjectFile('lib/Service/Audit/SystemAuditRedactionService.php');
+
+        foreach ([
+            "'password'",
+            "'access_token'",
+            "'refresh_token'",
+            "'id_token'",
+            "'authorization'",
+            "'api_key'",
+            "'client_secret'",
+            "'smtp_password'",
+            "'microsoft_shared_client_secret'",
+            "'email'",
+            "'to_email'",
+        ] as $needle) {
+            self::assertStringContainsString($needle, $content);
+        }
+
+        self::assertStringContainsString("return str_contains(\$key, 'password')", $content);
+        self::assertStringContainsString("|| str_contains(\$key, 'secret')", $content);
+        self::assertStringContainsString("|| str_contains(\$key, 'token')", $content);
+        self::assertStringContainsString("|| str_contains(\$key, 'authorization')", $content);
+        self::assertStringContainsString("|| str_ends_with(\$key, '_key');", $content);
+    }
+
+    public function testApiAuditRedactionCoversCredentialsAndAuthorizationFields(): void
+    {
+        $content = $this->readProjectFile('lib/Service/Audit/ApiAuditService.php');
+
+        foreach ([
+            "'token'",
+            "'access_token'",
+            "'refresh_token'",
+            "'id_token'",
+            "'secret'",
+            "'password'",
+            "'authorization'",
+            "'api_key'",
+            "'client_secret'",
+            "'key'",
+        ] as $needle) {
+            self::assertStringContainsString($needle, $content);
+        }
+
+        self::assertStringContainsString("return str_contains(\$key, 'token')", $content);
+        self::assertStringContainsString("|| str_contains(\$key, 'secret')", $content);
+        self::assertStringContainsString("|| str_contains(\$key, 'password')", $content);
+        self::assertStringContainsString("|| str_contains(\$key, 'authorization')", $content);
+        self::assertStringContainsString("|| str_ends_with(\$key, '_key');", $content);
+    }
+}
diff --git a/tests/Architecture/SecurityLoggingRuntimeContractTest.php b/tests/Architecture/SecurityLoggingRuntimeContractTest.php
new file mode 100644
index 0000000..dfd9a4f
--- /dev/null
+++ b/tests/Architecture/SecurityLoggingRuntimeContractTest.php
@@ -0,0 +1,39 @@
+<?php
+
+namespace MintyPHP\Tests\Architecture;
+
+use PHPUnit\Framework\TestCase;
+
+final class SecurityLoggingRuntimeContractTest extends TestCase
+{
+    use ProjectFileAssertionSupport;
+
+    public function testFrontendTelemetryIngestUsesOnlyRequestScopedErrorLogFallback(): void
+    {
+        $violations = array_merge(
+            $this->findPatternMatchesInPhpFiles('lib', '/\berror_log\s*\(/'),
+            $this->findPatternMatchesInPhpFiles('pages', '/\berror_log\s*\(/')
+        );
+        sort($violations);
+
+        self::assertSame(
+            ['pages/admin/frontend-telemetry/ingest().php'],
+            $violations,
+            "Unexpected error_log() usage outside the telemetry ingest fallback:\n" . implode("\n", $violations)
+        );
+
+        $content = $this->readProjectFile('pages/admin/frontend-telemetry/ingest().php');
+        self::assertStringContainsString(
+            "error_log('[frontend-telemetry] ingest record_failed request_id=' . RequestContext::id());",
+            $content
+        );
+
+        preg_match('/^.*\berror_log\s*\(.*$/m', $content, $matches);
+        $errorLogLine = $matches[0] ?? '';
+
+        self::assertNotSame('', $errorLogLine, 'Expected a dedicated telemetry error_log() fallback line.');
+        self::assertStringNotContainsString('$payload', $errorLogLine);
+        self::assertStringNotContainsString('$record', $errorLogLine);
+        self::assertStringNotContainsString('$events', $errorLogLine);
+    }
+}
diff --git a/tests/Architecture/SecurityLoggingTelemetryContractTest.php b/tests/Architecture/SecurityLoggingTelemetryContractTest.php
new file mode 100644
index 0000000..656f67b
--- /dev/null
+++ b/tests/Architecture/SecurityLoggingTelemetryContractTest.php
@@ -0,0 +1,21 @@
+<?php
+
+namespace MintyPHP\Tests\Architecture;
+
+use PHPUnit\Framework\TestCase;
+
+final class SecurityLoggingTelemetryContractTest extends TestCase
+{
+    use ProjectFileAssertionSupport;
+
+    public function testFrontendTelemetrySanitizesSecretsAndPiiMarkers(): void
+    {
+        $content = $this->readProjectFile('lib/Service/Audit/FrontendTelemetryIngestService.php');
+
+        self::assertStringContainsString('[REDACTED]', $content);
+        self::assertStringContainsString('[REDACTED_EMAIL]', $content);
+        self::assertStringContainsString('[UUID]', $content);
+        self::assertStringContainsString('[TOKEN]', $content);
+        self::assertStringContainsString('(token|access_token|refresh_token|id_token|authorization|api_key|secret)', $content);
+    }
+}
diff --git a/tests/README.md b/tests/README.md
index 602478b..d0eaf1b 100644
--- a/tests/README.md
+++ b/tests/README.md
@@ -33,6 +33,6 @@ ohne dass jede Aenderung immer die komplette Suite im Kopf behalten muss.
 ## Naechste Refactor-Kandidaten
 
 - `tests/Architecture/ContainerFactoryContractTest.php`
-- `tests/Architecture/SecurityLoggingContractTest.php`
 - `tests/Architecture/StatusTaxonomyContractTest.php`
 - `tests/Architecture/AuthLoginAccessibilityContractTest.php`
+- `tests/Architecture/SecurityCryptoContractTest.php`