diff --git a/src/DataStructure/Behavioral/Indexable.php b/src/DataStructure/Behavioral/Indexable.php
index d09e7bd..e291d02 100644
--- a/src/DataStructure/Behavioral/Indexable.php
+++ b/src/DataStructure/Behavioral/Indexable.php
@@ -21,11 +21,11 @@ interface Indexable
     /**
      * Retrieves an element at the specified index.
      *
-     * @param int $index The index of the element to retrieve
+     * @param mixed $index The index of the element to retrieve
      *
      * @return mixed The element at the specified index
      */
-    public function get(int $index): mixed;
+    public function get(mixed $index): mixed;
 
     /**
      * Sets an element at the specified index.
@@ -33,5 +33,5 @@ public function get(int $index): mixed;
      * @param int $index The index where the element should be set
      * @param mixed $element The element to set
      */
-    public function set(int $index, mixed $element): void;
+    public function set(mixed $index, mixed $element): void;
 }
diff --git a/src/Logging/LogHandler.php b/src/Logging/LogHandler.php
index 20797d0..66dc6e8 100644
--- a/src/Logging/LogHandler.php
+++ b/src/Logging/LogHandler.php
@@ -37,6 +37,7 @@ public function handle(ImmutableValue $record): void;
 
     /**
      * Checks whether the handler is handling the given log level.
+     *
      * @param ImmutableValue $record the log record to be processed, represented as an associative array
      */
     public function isHandling(ImmutableValue $record): bool;
diff --git a/src/Logging/LogLevel.php b/src/Logging/LogLevel.php
index ec7d050..dfff525 100644
--- a/src/Logging/LogLevel.php
+++ b/src/Logging/LogLevel.php
@@ -27,7 +27,14 @@ interface LogLevel
     public function getLevel(): string;
 
     /**
-     * Gets the log level as a int level
+     * Gets the color level as a string.
+     *
+     * @return string the color level
+     */
+    public function getColor(): string;
+
+    /**
+     * Gets the log level as a int level.
      *
      * @return int the log level
      */
diff --git a/src/Logging/LogRotator.php b/src/Logging/LogRotator.php
index 16a0f8e..c128edd 100644
--- a/src/Logging/LogRotator.php
+++ b/src/Logging/LogRotator.php
@@ -21,6 +21,7 @@
 interface LogRotator
 {
     public function shouldRotate(string $filePath): bool;
+
     /**
      * Rotates a log file.
      *
@@ -30,5 +31,4 @@ public function shouldRotate(string $filePath): bool;
      * @param string $filename the name of the log file to be rotated
      */
     public function rotate(string $filename): void;
-
 }
diff --git a/src/Processor/ConfigurableProcessor.php b/src/Processor/ConfigurableProcessor.php
new file mode 100644
index 0000000..84b3b37
--- /dev/null
+++ b/src/Processor/ConfigurableProcessor.php
@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace KaririCode\Contract\Processor;
+
+/**
+ * Interface ConfigurableProcessor.
+ *
+ * Extends the Processor interface to allow configuration of the processor.
+ *
+ * @category  Processor
+ *
+ * @author    Walmir Silva <walmir.silva@kariricode.org>
+ * @license   MIT
+ *
+ * @see       https://kariricode.org/
+ */
+interface ConfigurableProcessor extends Processor
+{
+    /**
+     * Configures the processor with the provided options.
+     *
+     * @param array $options The configuration options
+     */
+    public function configure(array $options): void;
+}
diff --git a/src/Processor/Pipeline.php b/src/Processor/Pipeline.php
new file mode 100644
index 0000000..57b6034
--- /dev/null
+++ b/src/Processor/Pipeline.php
@@ -0,0 +1,36 @@
+<?php
+
+declare(strict_types=1);
+
+namespace KaririCode\Contract\Processor;
+
+/**
+ * Interface Pipeline.
+ *
+ * Defines the contract for a pipeline that can execute a series of processors.
+ *
+ * @category  Processor
+ *
+ * @author    Walmir Silva <walmir.silva@kariricode.org>
+ * @license   MIT
+ *
+ * @see       https://kariricode.org/
+ */
+interface Pipeline
+{
+    /**
+     * Adds a processor to the pipeline.
+     *
+     * @param Processor $processor The processor to be added
+     */
+    public function addProcessor(Processor $processor): self;
+
+    /**
+     * Executes the processing pipeline on the provided input.
+     *
+     * @param mixed $input The value to be processed by the pipeline
+     *
+     * @return mixed The final result after passing through all processors
+     */
+    public function process(mixed $input): mixed;
+}
diff --git a/src/Processor/Processor.php b/src/Processor/Processor.php
new file mode 100644
index 0000000..c1d865e
--- /dev/null
+++ b/src/Processor/Processor.php
@@ -0,0 +1,29 @@
+<?php
+
+declare(strict_types=1);
+
+namespace KaririCode\Contract\Processor;
+
+/**
+ * Interface Processor.
+ *
+ * Defines the contract for a processor that can transform or validate input data.
+ *
+ * @category  Processor
+ *
+ * @author    Walmir Silva <walmir.silva@kariricode.org>
+ * @license   MIT
+ *
+ * @see       https://kariricode.org/
+ */
+interface Processor
+{
+    /**
+     * Processes the provided input and returns the result.
+     *
+     * @param mixed $input The value to be processed
+     *
+     * @return mixed The result of the processing
+     */
+    public function process(mixed $input): mixed;
+}
diff --git a/tests/Processor/ConfigurableProcessorTest.php b/tests/Processor/ConfigurableProcessorTest.php
new file mode 100644
index 0000000..8c0b479
--- /dev/null
+++ b/tests/Processor/ConfigurableProcessorTest.php
@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+
+namespace KaririCode\Contract\Tests\Processor;
+
+use KaririCode\Contract\Processor\ConfigurableProcessor;
+use PHPUnit\Framework\TestCase;
+
+final class ConfigurableProcessorTest extends TestCase
+{
+    public function testConfigure(): void
+    {
+        $mock = $this->createMock(ConfigurableProcessor::class);
+        $mock->expects($this->once())
+            ->method('configure')
+            ->with(['option' => 'value']);
+
+        $mock->configure(['option' => 'value']);
+    }
+
+    public function testProcess(): void
+    {
+        $mock = $this->createMock(ConfigurableProcessor::class);
+        $mock->expects($this->once())
+            ->method('process')
+            ->with('input')
+            ->willReturn('output');
+
+        $this->assertSame('output', $mock->process('input'));
+    }
+}
diff --git a/tests/Processor/PipelineTest.php b/tests/Processor/PipelineTest.php
new file mode 100644
index 0000000..0fa0e1c
--- /dev/null
+++ b/tests/Processor/PipelineTest.php
@@ -0,0 +1,36 @@
+<?php
+
+declare(strict_types=1);
+
+namespace KaririCode\Contract\Tests\Processor;
+
+use KaririCode\Contract\Processor\Pipeline;
+use KaririCode\Contract\Processor\Processor;
+use PHPUnit\Framework\TestCase;
+
+final class PipelineTest extends TestCase
+{
+    public function testAddProcessor(): void
+    {
+        $mock = $this->createMock(Pipeline::class);
+        $processor = $this->createMock(Processor::class);
+
+        $mock->expects($this->once())
+            ->method('addProcessor')
+            ->with($processor)
+            ->willReturnSelf();
+
+        $this->assertSame($mock, $mock->addProcessor($processor));
+    }
+
+    public function testProcess(): void
+    {
+        $mock = $this->createMock(Pipeline::class);
+        $mock->expects($this->once())
+            ->method('process')
+            ->with('input')
+            ->willReturn('output');
+
+        $this->assertSame('output', $mock->process('input'));
+    }
+}
diff --git a/tests/Processor/ProcessorTest.php b/tests/Processor/ProcessorTest.php
new file mode 100644
index 0000000..dcdb94a
--- /dev/null
+++ b/tests/Processor/ProcessorTest.php
@@ -0,0 +1,22 @@
+<?php
+
+declare(strict_types=1);
+
+namespace KaririCode\Contract\Tests\Processor;
+
+use KaririCode\Contract\Processor\Processor;
+use PHPUnit\Framework\TestCase;
+
+final class ProcessorTest extends TestCase
+{
+    public function testProcess(): void
+    {
+        $mock = $this->createMock(Processor::class);
+        $mock->expects($this->once())
+            ->method('process')
+            ->with('input')
+            ->willReturn('output');
+
+        $this->assertSame('output', $mock->process('input'));
+    }
+}