diff --git a/composer/composer/autoload_classmap.php b/composer/composer/autoload_classmap.php
index daa77de7338..c602abf082c 100644
--- a/composer/composer/autoload_classmap.php
+++ b/composer/composer/autoload_classmap.php
@@ -9,6 +9,7 @@
     'Composer\\InstalledVersions' => $vendorDir . '/composer/InstalledVersions.php',
     'OCA\\Text\\AppInfo\\Application' => $baseDir . '/../lib/AppInfo/Application.php',
     'OCA\\Text\\Command\\ResetDocument' => $baseDir . '/../lib/Command/ResetDocument.php',
+    'OCA\\Text\\ConfigLexicon' => $baseDir . '/../lib/ConfigLexicon.php',
     'OCA\\Text\\Controller\\AttachmentController' => $baseDir . '/../lib/Controller/AttachmentController.php',
     'OCA\\Text\\Controller\\ISessionAwareController' => $baseDir . '/../lib/Controller/ISessionAwareController.php',
     'OCA\\Text\\Controller\\NavigationController' => $baseDir . '/../lib/Controller/NavigationController.php',
diff --git a/composer/composer/autoload_static.php b/composer/composer/autoload_static.php
index ef2fa93317e..255d55aac46 100644
--- a/composer/composer/autoload_static.php
+++ b/composer/composer/autoload_static.php
@@ -24,6 +24,7 @@ class ComposerStaticInitText
         'Composer\\InstalledVersions' => __DIR__ . '/..' . '/composer/InstalledVersions.php',
         'OCA\\Text\\AppInfo\\Application' => __DIR__ . '/..' . '/../lib/AppInfo/Application.php',
         'OCA\\Text\\Command\\ResetDocument' => __DIR__ . '/..' . '/../lib/Command/ResetDocument.php',
+        'OCA\\Text\\ConfigLexicon' => __DIR__ . '/..' . '/../lib/ConfigLexicon.php',
         'OCA\\Text\\Controller\\AttachmentController' => __DIR__ . '/..' . '/../lib/Controller/AttachmentController.php',
         'OCA\\Text\\Controller\\ISessionAwareController' => __DIR__ . '/..' . '/../lib/Controller/ISessionAwareController.php',
         'OCA\\Text\\Controller\\NavigationController' => __DIR__ . '/..' . '/../lib/Controller/NavigationController.php',
diff --git a/lib/AppInfo/Application.php b/lib/AppInfo/Application.php
index 8b069b3823f..d8ad0de0897 100644
--- a/lib/AppInfo/Application.php
+++ b/lib/AppInfo/Application.php
@@ -49,6 +49,8 @@ public function __construct(array $params = []) {
 	}
 
 	public function register(IRegistrationContext $context): void {
+		$context->registerConfigLexicon(\OCA\Text\ConfigLexicon::class);
+
 		$context->registerEventListener(RegisterDirectEditorEvent::class, RegisterDirectEditorEventListener::class);
 		$context->registerEventListener(LoadViewer::class, LoadViewerListener::class);
 		$context->registerEventListener(LoadAdditionalScriptsEvent::class, FilesLoadAdditionalScriptsListener::class);
diff --git a/lib/ConfigLexicon.php b/lib/ConfigLexicon.php
new file mode 100644
index 00000000000..8a7a5a48ba7
--- /dev/null
+++ b/lib/ConfigLexicon.php
@@ -0,0 +1,80 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCA\Text;
+
+use OCP\Config\Lexicon\Entry;
+use OCP\Config\Lexicon\ILexicon;
+use OCP\Config\Lexicon\Strictness;
+use OCP\Config\ValueType;
+
+class ConfigLexicon implements ILexicon {
+	public function getStrictness(): Strictness {
+		return Strictness::WARNING;
+	}
+
+	public function getAppConfigs(): array {
+		return [
+			new Entry(
+				key: 'default_file_extension',
+				type: ValueType::STRING,
+				defaultRaw: 'md',
+				definition: 'Default file extension for new text files',
+				lazy: false,
+			),
+			new Entry(
+				key: 'open_read_only_enabled',
+				type: ValueType::BOOL,
+				defaultRaw: false,
+				definition: 'Whether opening files in read-only mode is enabled',
+				lazy: false,
+			),
+			new Entry(
+				key: 'rich_editing_enabled',
+				type: ValueType::BOOL,
+				defaultRaw: true,
+				definition: 'Whether rich editing is enabled',
+				lazy: false,
+			),
+			new Entry(
+				key: 'workspace_available',
+				type: ValueType::BOOL,
+				defaultRaw: true,
+				definition: 'Whether rich workspace feature is available',
+				lazy: false,
+			),
+			new Entry(
+				key: 'notify_push',
+				type: ValueType::BOOL,
+				defaultRaw: true,
+				definition: 'Whether notify_push synchronization is enabled',
+				lazy: false,
+			),
+		];
+	}
+
+	public function getUserConfigs(): array {
+		return [
+			new Entry(
+				key: 'workspace_enabled',
+				type: ValueType::BOOL,
+				defaultRaw: true,
+				definition: 'Whether rich workspace is enabled for the user',
+				lazy: false,
+			),
+			new Entry(
+				key: 'is_full_width_editor',
+				type: ValueType::BOOL,
+				defaultRaw: false,
+				definition: 'Whether the editor should be displayed in full width mode',
+				lazy: false,
+			),
+		];
+	}
+}
diff --git a/lib/Service/ConfigService.php b/lib/Service/ConfigService.php
index 08ac8b2b1e6..36135eb2915 100644
--- a/lib/Service/ConfigService.php
+++ b/lib/Service/ConfigService.php
@@ -25,18 +25,18 @@ public function getDefaultFileExtension(): string {
 	}
 
 	public function isOpenReadOnlyEnabled(): bool {
-		return $this->appConfig->getValueString(Application::APP_NAME, 'open_read_only_enabled', '0') === '1';
+		return $this->appConfig->getValueBool(Application::APP_NAME, 'open_read_only_enabled');
 	}
 
 	public function isRichEditingEnabled(): bool {
-		return ($this->appConfig->getValueString(Application::APP_NAME, 'rich_editing_enabled', '1') === '1');
+		return $this->appConfig->getValueBool(Application::APP_NAME, 'rich_editing_enabled', true);
 	}
 
 	public function isRichWorkspaceAvailable(): bool {
 		if ($this->config->getSystemValueBool('enable_non-accessible_features', true) === false) {
 			return false;
 		}
-		return $this->appConfig->getValueString(Application::APP_NAME, 'workspace_available', '1') === '1';
+		return $this->appConfig->getValueBool(Application::APP_NAME, 'workspace_available', true);
 	}
 
 	public function isRichWorkspaceEnabledForUser(?string $userId): bool {