diff --git a/packages/documentator/docs/Commands/preprocess.md b/packages/documentator/docs/Commands/preprocess.md
index cad4ca461..1325009ee 100644
--- a/packages/documentator/docs/Commands/preprocess.md
+++ b/packages/documentator/docs/Commands/preprocess.md
@@ -33,8 +33,8 @@ Where:
 
 * `<target>` - File path.
 * `<parameters>` - additional parameters
-  * `summary` - Include the class summary? (default `true`)
-  * `description` - Include the class description? (default `true`)
+  * `summary: bool = true` - Include the class summary?
+  * `description: bool = true` - Include the class description?
 
 Includes the docblock of the first PHP class/interface/trait/enum/etc
 from `<target>` file. Inline tags include as is except `@see`/`@link`
@@ -44,8 +44,8 @@ which will be replaced to FQCN (if possible). Other tags are ignored.
 
 * `<target>` - Directory path.
 * `<parameters>` - additional parameters
-  * `depth` - Default is `0` (no nested directories). The `null` removes limits.
-  * `template` - Blade template
+  * `depth: array|string|int|null = 0` - [Directory Depth](https://symfony.com/doc/current/components/finder.html#directory-depth) (eg the `0` means no nested directories, the `null` removes limits).
+  * `template: string = 'default'` - Blade template.
 
 Returns the list of `*.md` files in the `<target>` directory. Each file
 must have `# Header` as the first construction. The first paragraph
@@ -79,7 +79,7 @@ Includes the `<target>` file.
 
 * `<target>` - Directory path.
 * `<parameters>` - additional parameters
-  * `template` - Blade template
+  * `template: string = 'default'` - Blade template.
 
 Generates package list from `<target>` directory. The readme file will be
 used to determine package name and summary.
@@ -88,7 +88,7 @@ used to determine package name and summary.
 
 * `<target>` - File path.
 * `<parameters>` - additional parameters
-  * `data` - Array of variables (`${name}`) to replace (required).
+  * `data: array` - Array of variables (`${name}`) to replace.
 
 Includes the `<target>` as a template.
 
diff --git a/packages/documentator/src/Commands/Preprocess.php b/packages/documentator/src/Commands/Preprocess.php
index 2d9b4249b..790da022c 100644
--- a/packages/documentator/src/Commands/Preprocess.php
+++ b/packages/documentator/src/Commands/Preprocess.php
@@ -8,17 +8,28 @@
 use LastDragon_ru\LaraASP\Documentator\Package;
 use LastDragon_ru\LaraASP\Documentator\Preprocessor\Contracts\ParameterizableInstruction;
 use LastDragon_ru\LaraASP\Documentator\Preprocessor\Preprocessor;
+use LastDragon_ru\LaraASP\Documentator\Utils\PhpDoc;
+use LastDragon_ru\LaraASP\Serializer\Contracts\Serializable;
 use Override;
+use ReflectionClass;
+use ReflectionProperty;
 use Symfony\Component\Console\Attribute\AsCommand;
 use Symfony\Component\Filesystem\Filesystem;
 use Symfony\Component\Finder\Finder;
 
+use function array_map;
+use function explode;
 use function getcwd;
+use function gettype;
 use function implode;
 use function is_a;
+use function is_scalar;
 use function ksort;
+use function rtrim;
+use function str_replace;
 use function strtr;
 use function trim;
+use function var_export;
 
 /**
  * @see Preprocessor
@@ -116,7 +127,7 @@ protected function getInstructionsHelp(Preprocessor $preprocessor): string {
             $desc   = $instruction::getDescription();
             $target = $instruction::getTargetDescription();
             $params = is_a($instruction, ParameterizableInstruction::class, true)
-                ? $instruction::getParametersDescription()
+                ? $this->getInstructionParameters($instruction)
                 : null;
 
             if ($target !== null && $params !== null) {
@@ -160,4 +171,76 @@ protected function getInstructionsHelp(Preprocessor $preprocessor): string {
 
         return implode("\n\n", $help);
     }
+
+    /**
+     * @template T of Serializable
+     *
+     * @param class-string<ParameterizableInstruction<T>> $instruction
+     *
+     * @return array<string, string>
+     */
+    protected function getInstructionParameters(string $instruction): array {
+        // Explicit? (deprecated)
+        $parameters = $instruction::getParametersDescription();
+
+        if ($parameters) {
+            return $parameters;
+        }
+
+        // Nope
+        $class      = new ReflectionClass($instruction::getParameters());
+        $properties = $class->getProperties(ReflectionProperty::IS_PUBLIC);
+        $parameters = [];
+
+        foreach ($properties as $property) {
+            // Ignored?
+            if (!$property->isPublic() || $property->isStatic()) {
+                continue;
+            }
+
+            // Name
+            $name       = $property->getName();
+            $definition = $name;
+            $hasDefault = $property->hasDefaultValue();
+            $theDefault = $hasDefault
+                ? $property->getDefaultValue()
+                : null;
+
+            if ($property->hasType()) {
+                $definition = "{$definition}: {$property->getType()}";
+            }
+
+            if ($property->isPromoted()) {
+                foreach ($class->getConstructor()?->getParameters() ?? [] as $parameter) {
+                    if ($parameter->getName() === $name) {
+                        $hasDefault = $parameter->isDefaultValueAvailable();
+                        $theDefault = $hasDefault
+                            ? $parameter->getDefaultValue()
+                            : null;
+
+                        break;
+                    }
+                }
+            }
+
+            if ($hasDefault) {
+                $default    = is_scalar($theDefault) ? var_export($theDefault, true) : '<'.gettype($theDefault).'>';
+                $definition = "{$definition} = {$default}";
+            } else {
+                // empty
+            }
+
+            // Description
+            $doc         = new PhpDoc($property->getDocComment() ?: null);
+            $description = $doc->getSummary() ?: '_No description provided_.';
+            $description = trim(
+                implode(' ', array_map(rtrim(...), explode("\n", str_replace("\r\n", "\n", $description)))),
+            );
+
+            // Add
+            $parameters[$definition] = $description;
+        }
+
+        return $parameters;
+    }
 }
diff --git a/packages/documentator/src/Commands/PreprocessTest.php b/packages/documentator/src/Commands/PreprocessTest.php
new file mode 100644
index 000000000..7a96b4dcb
--- /dev/null
+++ b/packages/documentator/src/Commands/PreprocessTest.php
@@ -0,0 +1,109 @@
+<?php declare(strict_types = 1);
+
+namespace LastDragon_ru\LaraASP\Documentator\Commands;
+
+use LastDragon_ru\LaraASP\Documentator\Preprocessor\Contracts\ParameterizableInstruction;
+use LastDragon_ru\LaraASP\Documentator\Testing\Package\TestCase;
+use LastDragon_ru\LaraASP\Serializer\Contracts\Serializable;
+use Override;
+use PHPUnit\Framework\Attributes\CoversClass;
+
+/**
+ * @internal
+ */
+#[CoversClass(Preprocess::class)]
+final class PreprocessTest extends TestCase {
+    public function testGetInstructionParameters(): void {
+        $command = new class() extends Preprocess {
+            /**
+             * @inheritDoc
+             */
+            #[Override]
+            public function getInstructionParameters(string $instruction): array {
+                return parent::getInstructionParameters($instruction);
+            }
+        };
+
+        self::assertEquals(
+            [
+                'publicPropertyWithoutDefaultValue: int'            => 'Description.',
+                'publicPropertyWithDefaultValue: float = 123.0'     => '_No description provided_.',
+                'publicPromotedPropertyWithoutDefaultValue: int'    => 'Description.',
+                'publicPromotedPropertyWithDefaultValue: int = 321' => '_No description provided_.',
+            ],
+            $command->getInstructionParameters(
+                PreprocessTest__ParameterizableInstruction::class,
+            ),
+        );
+    }
+}
+
+// @phpcs:disable PSR1.Classes.ClassDeclaration.MultipleClasses
+// @phpcs:disable Squiz.Classes.ValidClassName.NotCamelCaps
+
+/**
+ * @internal
+ * @noinspection PhpMultipleClassesDeclarationsInOneFile
+ *
+ * @implements ParameterizableInstruction<PreprocessTest__ParameterizableInstructionParameters>
+ */
+class PreprocessTest__ParameterizableInstruction implements ParameterizableInstruction {
+    #[Override]
+    public static function getName(): string {
+        return 'test:parameterizable-instruction';
+    }
+
+    #[Override]
+    public static function getDescription(): string {
+        return 'Description description description description description.';
+    }
+
+    #[Override]
+    public static function getTargetDescription(): ?string {
+        return 'Target target target target target.';
+    }
+
+    #[Override]
+    public static function getParameters(): string {
+        return PreprocessTest__ParameterizableInstructionParameters::class;
+    }
+
+    /**
+     * @inheritDoc
+     */
+    #[Override]
+    public static function getParametersDescription(): array {
+        return [];
+    }
+
+    #[Override]
+    public function process(string $path, string $target, Serializable $parameters): string {
+        return $path;
+    }
+}
+
+/**
+ * @internal
+ * @noinspection PhpMultipleClassesDeclarationsInOneFile
+ */
+class PreprocessTest__ParameterizableInstructionParameters implements Serializable {
+    public static bool $publicStaticProperty = true;
+
+    /**
+     * Description.
+     */
+    public int   $publicPropertyWithoutDefaultValue;
+    public float $publicPropertyWithDefaultValue = 123;
+
+    public function __construct(
+        /**
+         * Description.
+         */
+        public int $publicPromotedPropertyWithoutDefaultValue,
+        public int $publicPromotedPropertyWithDefaultValue = 321,
+        protected bool $protectedProperty = true,
+        protected bool $privateProperty = true,
+    ) {
+        $this->publicPropertyWithoutDefaultValue = 0;
+    }
+}
diff --git a/packages/documentator/src/Preprocessor/Contracts/ParameterizableInstruction.php b/packages/documentator/src/Preprocessor/Contracts/ParameterizableInstruction.php
index c08122610..3047bcd2a 100644
--- a/packages/documentator/src/Preprocessor/Contracts/ParameterizableInstruction.php
+++ b/packages/documentator/src/Preprocessor/Contracts/ParameterizableInstruction.php
@@ -14,7 +14,9 @@ interface ParameterizableInstruction extends Instruction {
     public static function getParameters(): string;
 
     /**
-     * @return non-empty-array<string, string>
+     * @deprecated %{VERSION} Use docblock instead.
+     *
+     * @return array<string, string>
      */
     public static function getParametersDescription(): array;
 
diff --git a/packages/documentator/src/Preprocessor/Instructions/IncludeDocBlock/Instruction.php b/packages/documentator/src/Preprocessor/Instructions/IncludeDocBlock/Instruction.php
index 7cdef0542..d0d84a590 100644
--- a/packages/documentator/src/Preprocessor/Instructions/IncludeDocBlock/Instruction.php
+++ b/packages/documentator/src/Preprocessor/Instructions/IncludeDocBlock/Instruction.php
@@ -7,6 +7,7 @@
 use LastDragon_ru\LaraASP\Documentator\Preprocessor\Contracts\ParameterizableInstruction;
 use LastDragon_ru\LaraASP\Documentator\Preprocessor\Exceptions\TargetIsNotFile;
 use LastDragon_ru\LaraASP\Documentator\Preprocessor\Exceptions\TargetIsNotValidPhpFile;
+use LastDragon_ru\LaraASP\Documentator\Utils\PhpDoc;
 use LastDragon_ru\LaraASP\Serializer\Contracts\Serializable;
 use Override;
 use PhpParser\NameContext;
@@ -17,18 +18,9 @@
 use PhpParser\NodeTraverser;
 use PhpParser\NodeVisitor\NameResolver;
 use PhpParser\ParserFactory;
-use PHPStan\PhpDocParser\Ast\PhpDoc\PhpDocNode as PhpDocBlockNode;
-use PHPStan\PhpDocParser\Ast\PhpDoc\PhpDocTextNode;
-use PHPStan\PhpDocParser\Lexer\Lexer;
-use PHPStan\PhpDocParser\Parser\ConstExprParser;
-use PHPStan\PhpDocParser\Parser\PhpDocParser;
-use PHPStan\PhpDocParser\Parser\TokenIterator;
-use PHPStan\PhpDocParser\Parser\TypeParser;
-
-use function array_slice;
+
 use function dirname;
 use function file_get_contents;
-use function implode;
 use function preg_replace_callback;
 use function trim;
 
@@ -71,10 +63,7 @@ public static function getParameters(): string {
      */
     #[Override]
     public static function getParametersDescription(): array {
-        return [
-            'summary'     => 'Include the class summary? (default `true`)',
-            'description' => 'Include the class description? (default `true`)',
-        ];
+        return [];
     }
 
     #[Override]
@@ -94,32 +83,19 @@ public function process(string $path, string $target, Serializable $parameters):
             return '';
         }
 
-        // DocBlock?
-        $node = $this->getDocNode($class);
-
-        if (!$node) {
-            return '';
-        }
-
         // Parse
         $eol    = "\n";
-        $text   = $this->getDocText($node);
+        $doc    = new PhpDoc($class->getDocComment()?->getText(), $eol.$eol);
         $result = '';
 
-        if ($parameters->summary) {
-            $summary = trim(implode($eol.$eol, array_slice($text, 0, 1)));
-
-            if ($summary) {
-                $result .= $summary.$eol.$eol;
-            }
-        }
-
-        if ($parameters->description) {
-            $description = trim(implode($eol.$eol, array_slice($text, 1)));
-
-            if ($description) {
-                $result .= $description.$eol.$eol;
-            }
+        if ($parameters->summary && $parameters->description) {
+            $result .= trim($doc->getText());
+        } elseif ($parameters->summary) {
+            $result .= trim($doc->getSummary());
+        } elseif ($parameters->description) {
+            $result .= trim($doc->getDescription());
+        } else {
+            // empty
         }
 
         if ($result) {
@@ -152,43 +128,6 @@ private function getClass(string $content, string $path, string $target): ?array
             : null;
     }
 
-    private function getDocNode(ClassLike $class): ?PhpDocBlockNode {
-        // Comment?
-        $comment = $class->getDocComment();
-
-        if (!$comment || trim($comment->getText()) === '') {
-            return null;
-        }
-
-        // Parse
-        $lexer  = new Lexer();
-        $parser = new PhpDocParser(new TypeParser(new ConstExprParser()), new ConstExprParser());
-        $tokens = new TokenIterator($lexer->tokenize($comment->getText()));
-        $node   = $parser->parse($tokens);
-
-        // Return
-        return $node;
-    }
-
-    /**
-     * @return list<string>
-     */
-    private function getDocText(PhpDocBlockNode $node): array {
-        $nodes = [];
-
-        foreach ($node->children as $child) {
-            if ($child instanceof PhpDocTextNode) {
-                if (trim($child->text) !== '') {
-                    $nodes[] = $child->text;
-                }
-            } else {
-                break;
-            }
-        }
-
-        return $nodes;
-    }
-
     /**
      * @return array<array-key, Node>
      */
diff --git a/packages/documentator/src/Preprocessor/Instructions/IncludeDocBlock/Parameters.php b/packages/documentator/src/Preprocessor/Instructions/IncludeDocBlock/Parameters.php
index 20a6e497a..45713d8ee 100644
--- a/packages/documentator/src/Preprocessor/Instructions/IncludeDocBlock/Parameters.php
+++ b/packages/documentator/src/Preprocessor/Instructions/IncludeDocBlock/Parameters.php
@@ -6,7 +6,13 @@
 
 class Parameters implements Serializable {
     public function __construct(
+        /**
+         * Include the class summary?
+         */
         public readonly bool $summary = true,
+        /**
+         * Include the class description?
+         */
         public readonly bool $description = true,
     ) {
         // empty
diff --git a/packages/documentator/src/Preprocessor/Instructions/IncludeDocumentList/Instruction.php b/packages/documentator/src/Preprocessor/Instructions/IncludeDocumentList/Instruction.php
index 138b29f67..a591cca1f 100644
--- a/packages/documentator/src/Preprocessor/Instructions/IncludeDocumentList/Instruction.php
+++ b/packages/documentator/src/Preprocessor/Instructions/IncludeDocumentList/Instruction.php
@@ -58,10 +58,7 @@ public static function getParameters(): string {
      */
     #[Override]
     public static function getParametersDescription(): array {
-        return [
-            'depth'    => 'Default is `0` (no nested directories). The `null` removes limits.',
-            'template' => 'Blade template',
-        ];
+        return [];
     }
 
     #[Override]
diff --git a/packages/documentator/src/Preprocessor/Instructions/IncludeDocumentList/Parameters.php b/packages/documentator/src/Preprocessor/Instructions/IncludeDocumentList/Parameters.php
index 9452a9286..147c57510 100644
--- a/packages/documentator/src/Preprocessor/Instructions/IncludeDocumentList/Parameters.php
+++ b/packages/documentator/src/Preprocessor/Instructions/IncludeDocumentList/Parameters.php
@@ -8,10 +8,16 @@
 class Parameters implements Serializable {
     public function __construct(
         /**
+         * [Directory Depth](https://symfony.com/doc/current/components/finder.html#directory-depth)
+         * (eg the `0` means no nested directories, the `null` removes limits).
+         *
          * @see Finder::depth()
          * @var array<array-key, string|int>|string|int|null
          */
         public readonly array|string|int|null $depth = 0,
+        /**
+         * Blade template.
+         */
         public readonly string $template = 'default',
     ) {
         // empty
diff --git a/packages/documentator/src/Preprocessor/Instructions/IncludePackageList/Instruction.php b/packages/documentator/src/Preprocessor/Instructions/IncludePackageList/Instruction.php
index 65f77e40c..da81f23a2 100644
--- a/packages/documentator/src/Preprocessor/Instructions/IncludePackageList/Instruction.php
+++ b/packages/documentator/src/Preprocessor/Instructions/IncludePackageList/Instruction.php
@@ -66,9 +66,7 @@ public static function getParameters(): string {
      */
     #[Override]
     public static function getParametersDescription(): array {
-        return [
-            'template' => 'Blade template',
-        ];
+        return [];
     }
 
     #[Override]
diff --git a/packages/documentator/src/Preprocessor/Instructions/IncludePackageList/Parameters.php b/packages/documentator/src/Preprocessor/Instructions/IncludePackageList/Parameters.php
index 24347b023..299c40e13 100644
--- a/packages/documentator/src/Preprocessor/Instructions/IncludePackageList/Parameters.php
+++ b/packages/documentator/src/Preprocessor/Instructions/IncludePackageList/Parameters.php
@@ -6,6 +6,9 @@
 
 class Parameters implements Serializable {
     public function __construct(
+        /**
+         * Blade template.
+         */
         public readonly string $template = 'default',
     ) {
         // empty
diff --git a/packages/documentator/src/Preprocessor/Instructions/IncludeTemplate/Instruction.php b/packages/documentator/src/Preprocessor/Instructions/IncludeTemplate/Instruction.php
index c5917bf2b..dd46bb763 100644
--- a/packages/documentator/src/Preprocessor/Instructions/IncludeTemplate/Instruction.php
+++ b/packages/documentator/src/Preprocessor/Instructions/IncludeTemplate/Instruction.php
@@ -55,9 +55,7 @@ public static function getParameters(): string {
      */
     #[Override]
     public static function getParametersDescription(): array {
-        return [
-            'data' => 'Array of variables (`${name}`) to replace (required).',
-        ];
+        return [];
     }
 
     #[Override]
diff --git a/packages/documentator/src/Preprocessor/Instructions/IncludeTemplate/InstructionTest.php b/packages/documentator/src/Preprocessor/Instructions/IncludeTemplate/InstructionTest.php
index 98c066e0c..8e42bb4b4 100644
--- a/packages/documentator/src/Preprocessor/Instructions/IncludeTemplate/InstructionTest.php
+++ b/packages/documentator/src/Preprocessor/Instructions/IncludeTemplate/InstructionTest.php
@@ -57,7 +57,7 @@ public function testProcessAbsolute(): void {
 
     public function testProcessNoData(): void {
         $file     = self::getTestData()->file('.md');
-        $params   = new Parameters();
+        $params   = new Parameters([]);
         $instance = Container::getInstance()->make(Instruction::class);
 
         self::expectExceptionObject(
diff --git a/packages/documentator/src/Preprocessor/Instructions/IncludeTemplate/Parameters.php b/packages/documentator/src/Preprocessor/Instructions/IncludeTemplate/Parameters.php
index 3e3f3486c..38f48f58f 100644
--- a/packages/documentator/src/Preprocessor/Instructions/IncludeTemplate/Parameters.php
+++ b/packages/documentator/src/Preprocessor/Instructions/IncludeTemplate/Parameters.php
@@ -7,9 +7,11 @@
 class Parameters implements Serializable {
     public function __construct(
         /**
+         * Array of variables (`${name}`) to replace.
+         *
          * @var array<string, scalar|null>
          */
-        public readonly array $data = [],
+        public readonly array $data,
     ) {
         // empty
     }
diff --git a/packages/documentator/src/Utils/PhpDoc.php b/packages/documentator/src/Utils/PhpDoc.php
new file mode 100644
index 000000000..d0266508e
--- /dev/null
+++ b/packages/documentator/src/Utils/PhpDoc.php
@@ -0,0 +1,89 @@
+<?php declare(strict_types = 1);
+
+namespace LastDragon_ru\LaraASP\Documentator\Utils;
+
+use PHPStan\PhpDocParser\Ast\PhpDoc\PhpDocNode;
+use PHPStan\PhpDocParser\Ast\PhpDoc\PhpDocTextNode;
+use PHPStan\PhpDocParser\Lexer\Lexer;
+use PHPStan\PhpDocParser\Parser\ConstExprParser;
+use PHPStan\PhpDocParser\Parser\PhpDocParser;
+use PHPStan\PhpDocParser\Parser\TokenIterator;
+use PHPStan\PhpDocParser\Parser\TypeParser;
+
+use function array_slice;
+use function implode;
+use function trim;
+
+/**
+ * @internal
+ */
+class PhpDoc {
+    private readonly ?PhpDocNode $node;
+
+    /**
+     * @var list<string>
+     */
+    private readonly array $text;
+
+    public function __construct(
+        private readonly ?string $comment,
+        private readonly string $eol = "\n\n",
+    ) {
+        $this->node = $this->parse($this->comment);
+        $this->text = $this->getTextNodes($this->node);
+    }
+
+    public function getText(): string {
+        return $this->join($this->text);
+    }
+
+    public function getSummary(): string {
+        return $this->text[0] ?? '';
+    }
+
+    public function getDescription(): string {
+        return $this->join(array_slice($this->text, 1));
+    }
+
+    /**
+     * @param array<array-key, string> $strings
+     */
+    private function join(array $strings): string {
+        return implode($this->eol, $strings);
+    }
+
+    private function parse(?string $comment): ?PhpDocNode {
+        // Empty?
+        if (!$comment || trim($comment) === '') {
+            return null;
+        }
+
+        // Parse
+        $lexer  = new Lexer();
+        $parser = new PhpDocParser(new TypeParser(new ConstExprParser()), new ConstExprParser());
+        $tokens = new TokenIterator($lexer->tokenize($comment));
+        $node   = $parser->parse($tokens);
+
+        // Return
+        return $node;
+    }
+
+    /**
+     * @return list<string>
+     */
+    private function getTextNodes(?PhpDocNode $node): array {
+        $nodes = [];
+
+        foreach (($node->children ?? []) as $child) {
+            if ($child instanceof PhpDocTextNode) {
+                if (trim($child->text) !== '') {
+                    $nodes[] = $child->text;
+                }
+            } else {
+                break;
+            }
+        }
+
+        return $nodes;
+    }
+}