✨feature: Initial MVP

src/Domain/Board.php

@@ -0,0 +1,44 @@
+<?php
+// phpcs:disable PEAR.Commenting.FileComment,PEAR.Commenting.ClassComment
+
+/**
+ * Board domain model.
+ */
+
+declare(strict_types=1);
+
+namespace IronKanban\Domain;
+
+/**
+ * Represents a project's kanban board.
+ */
+final class Board
+{
+    /**
+     * Create a board instance.
+     *
+     * @param string               $projectId Project identifier.
+     * @param list<Column>         $columns   Board columns.
+     * @param array<string, mixed> $meta      Additional board metadata.
+     */
+    public function __construct(
+        public string $projectId,
+        public array $columns,
+        public array $meta = []
+    ) {
+    }
+
+    /**
+     * Convert the board into an API-friendly array.
+     *
+     * @return array<string, mixed>
+     */
+    public function toArray(): array
+    {
+        return [
+            'project_id' => $this->projectId,
+            'columns' => array_map(static fn (Column $column) => $column->toArray(), $this->columns),
+            'meta' => $this->meta,
+        ];
+    }
+}