Nikita Malyshev
--- a/src/Connection/ConnectionConfig.php 0 → 100644
+++ b/src/Connection/ConnectionConfig.php 0 → 100644
+    if ($this->host !== NULL || $this->port !== NULL) {
+      $errors[] = 'Host and port must be null for Unix connections';
+    }
+
+    $this->throwIfErrors($errors);
+  }
+
+  /**
+   * Throws aggregated validation errors as a single exception.
+   *
+   * @param list<string> $errors
+   *   List of validation error messages.
+   *
+   * @throws \InvalidArgumentException
+   */
+  private function throwIfErrors(array $errors): void {
--- a/src/Connection/ConnectionConfig.php 0 → 100644
+++ b/src/Connection/ConnectionConfig.php 0 → 100644
+
+namespace Drupal\cache_pilot\Connection;
+
+/**
+ * Immutable configuration container for Fast-CGI connections.
+ */
+final readonly class ConnectionConfig {
+
+  /**
+   * Constructs a new ConnectionConfig instance.
+   *
+   * @param string $type
+   *   The connection type. Supported values:
+   *   - 'tcp': TCP/IP connection (requires $host and $port)
+   *   - 'unix': Unix Domain Socket connection (requires $socketPath)
+   * @param string|null $socketPath
--- a/src/Connection/ConnectionConfig.php 0 → 100644
+++ b/src/Connection/ConnectionConfig.php 0 → 100644
+    $this->validateType();
+
+    match ($this->type) {
+      'tcp' => $this->validateTcpParams(),
+      'unix' => $this->validateUnixParams(),
+      default => throw new \InvalidArgumentException('Invalid connection type'),
+    };
+  }
+
+  /**
+   * Validates the connection type parameter.
+   *
+   * @throws \InvalidArgumentException
+   *   When an unsupported connection type is provided.
+   */
+  private function validateType(): void {