diff --git a/src/Resources/BuildoraResource.php b/src/Resources/BuildoraResource.php
index b8bfab3..e7d6a2e 100644
--- a/src/Resources/BuildoraResource.php
+++ b/src/Resources/BuildoraResource.php
@@ -5,6 +5,7 @@
 use Ginkelsoft\Buildora\Actions\BulkAction;
 use Ginkelsoft\Buildora\Exceptions\BuildoraException;
 use Ginkelsoft\Buildora\Resources\Concerns\HasResourceActions;
+use Ginkelsoft\Buildora\Resources\Concerns\HasResourceNavigation;
 use Illuminate\Database\Eloquent\Model;
 use Ginkelsoft\Buildora\Fields\Field;
 use Exception;
@@ -12,13 +13,13 @@
 /**
  * Abstract base class for all Buildora Resources.
  *
- * Decomposition: concerns that have a self-contained surface are pulled
- * out into traits in Resources\Concerns. See #135 for the long-term plan;
- * the action surface is the first concern to move.
+ * Concerns are pulled into traits under Resources\\Concerns as part of #135.
+ * This file should shrink over time; new methods belong in a trait by topic.
  */
 abstract class BuildoraResource
 {
     use HasResourceActions;
+    use HasResourceNavigation;
 
     protected ?Model $parentModel = null;
     protected string $modelClass;
@@ -42,28 +43,8 @@ public function __construct()
         FieldValidator::validate($this->fields, $modelInstance);
     }
 
-    public function title(): string
-    {
-        return class_basename($this->modelClass);
-    }
-
-    /**
-     * Configuratie voor zoekresultaten.
-     *
-     * @return array{label: string|array|callable, columns: string[]}
-     */
-    public function searchResultConfig(): array
-    {
-        return [
-            'label' => ['voornaam', 'achternaam'],
-            'columns' => ['voornaam', 'achternaam', 'emailadres'],
-        ];
-    }
-
-    public function showInNavigation(): bool
-    {
-        return true;
-    }
+    // title(), searchResultConfig(), showInNavigation() live in
+    // HasResourceNavigation (Resources\Concerns\HasResourceNavigation).
 
     /**
      * Create a new static instance of the resource.
@@ -213,15 +194,7 @@ public function getModelClass(): string
         return $this->modelClass;
     }
 
-    /**
-     * Generate a slug for the resource based on its class name.
-     *
-     * @return string
-     */
-    public static function slug(): string
-    {
-        return str_replace('buildora', '', strtolower(class_basename(static::class)));
-    }
+    // slug() lives in HasResourceNavigation.
 
     /**
      * Return the query builder for this resource WITHOUT eager-loading relations.
diff --git a/src/Resources/Concerns/HasResourceNavigation.php b/src/Resources/Concerns/HasResourceNavigation.php
new file mode 100644
index 0000000..4248e94
--- /dev/null
+++ b/src/Resources/Concerns/HasResourceNavigation.php
@@ -0,0 +1,74 @@
+<?php
+
+namespace Ginkelsoft\Buildora\Resources\Concerns;
+
+/**
+ * Resource navigation/identification surface, extracted from BuildoraResource
+ * as the second decomposition step for #135.
+ *
+ * Houses the four overridable hooks that decide:
+ *   - how the resource identifies itself in the URL (slug)
+ *   - how it labels itself in the admin nav and breadcrumbs (title)
+ *   - whether it shows up in the nav at all (showInNavigation)
+ *   - what the global search uses to label and search across rows
+ *     (searchResultConfig)
+ *
+ * Like HasResourceActions, this is a trait rather than a value object so
+ * that the subclass-overridable hook semantics stay intact — a consumer's
+ * UserBuildora overrides title()/searchResultConfig() and expects \$this
+ * dispatch to find them.
+ */
+trait HasResourceNavigation
+{
+    /**
+     * Human-readable label for the resource. Defaults to the model class
+     * basename.
+     */
+    public function title(): string
+    {
+        return class_basename($this->modelClass);
+    }
+
+    /**
+     * Configuration consumed by GlobalSearchController. The 'label' may be
+     * a column name, an array of column names (concatenated), or a callable
+     * receiving the model instance. 'columns' lists the columns scanned for
+     * `LIKE %term%` matches.
+     *
+     * The defaults below are tuned to the package's built-in UserBuildora;
+     * every other resource should override.
+     *
+     * @return array{label: string|array|callable, columns: string[]}
+     */
+    public function searchResultConfig(): array
+    {
+        return [
+            'label'   => ['voornaam', 'achternaam'],
+            'columns' => ['voornaam', 'achternaam', 'emailadres'],
+        ];
+    }
+
+    /**
+     * Whether to include this resource in the admin navigation. Subclasses
+     * return false to keep a resource available via direct URLs (e.g. for
+     * relation panels) without surfacing it in the menu.
+     */
+    public function showInNavigation(): bool
+    {
+        return true;
+    }
+
+    /**
+     * URL slug derived from the class basename:
+     *   `App\\Buildora\\Resources\\CouponBuildora` → 'coupon'
+     *
+     * Buildora routes match resources on this value, and Spatie permissions
+     * follow the {slug}.{verb} convention (see BuildoraAbility), so changing
+     * this mid-flight requires migrating both routes and the permissions
+     * table — override with care.
+     */
+    public static function slug(): string
+    {
+        return str_replace('buildora', '', strtolower(class_basename(static::class)));
+    }
+}
diff --git a/tests/Unit/Resources/Concerns/HasResourceNavigationTest.php b/tests/Unit/Resources/Concerns/HasResourceNavigationTest.php
new file mode 100644
index 0000000..85478b3
--- /dev/null
+++ b/tests/Unit/Resources/Concerns/HasResourceNavigationTest.php
@@ -0,0 +1,141 @@
+<?php
+
+namespace Ginkelsoft\Buildora\Tests\Unit\Resources\Concerns;
+
+use Ginkelsoft\Buildora\Resources\BuildoraResource;
+use Ginkelsoft\Buildora\Resources\Concerns\HasResourceNavigation;
+use Ginkelsoft\Buildora\Tests\TestCase;
+use Ginkelsoft\Buildora\Traits\HasBuildora;
+use Illuminate\Database\Eloquent\Model;
+use PHPUnit\Framework\Attributes\Test;
+use ReflectionClass;
+
+class RNCustomer extends Model
+{
+    use HasBuildora;
+    protected $table = 'rn_customers';
+    protected $guarded = [];
+    public $timestamps = false;
+}
+
+class CustomerBuildora extends BuildoraResource
+{
+    public static function modelClass(): string
+    {
+        return RNCustomer::class;
+    }
+
+    public function defineFields(): array
+    {
+        return [];
+    }
+}
+
+class HiddenFromNavigationResource extends BuildoraResource
+{
+    public static function modelClass(): string
+    {
+        return RNCustomer::class;
+    }
+
+    public function defineFields(): array
+    {
+        return [];
+    }
+
+    public function showInNavigation(): bool
+    {
+        return false;
+    }
+}
+
+class HasResourceNavigationTest extends TestCase
+{
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        \Illuminate\Support\Facades\Schema::create('rn_customers', function ($t) {
+            $t->increments('id');
+            $t->string('name')->nullable();
+        });
+    }
+
+    #[Test]
+    public function default_title_derives_from_the_model_class_basename(): void
+    {
+        $resource = new CustomerBuildora();
+
+        $this->assertSame('RNCustomer', $resource->title());
+    }
+
+    #[Test]
+    public function default_show_in_navigation_is_true(): void
+    {
+        $resource = new CustomerBuildora();
+
+        $this->assertTrue($resource->showInNavigation());
+    }
+
+    #[Test]
+    public function subclass_can_opt_out_of_navigation(): void
+    {
+        $resource = new HiddenFromNavigationResource();
+
+        $this->assertFalse($resource->showInNavigation());
+    }
+
+    #[Test]
+    public function slug_strips_the_buildora_suffix_and_lowercases(): void
+    {
+        $this->assertSame('customerbuildora', strtolower('CustomerBuildora'));
+        // CustomerBuildora -> 'customer' after str_replace('buildora', '', lower)
+        $this->assertSame('customer', CustomerBuildora::slug());
+    }
+
+    #[Test]
+    public function default_search_result_config_has_label_and_columns_keys(): void
+    {
+        $config = (new CustomerBuildora())->searchResultConfig();
+
+        $this->assertArrayHasKey('label', $config);
+        $this->assertArrayHasKey('columns', $config);
+        $this->assertIsArray($config['columns']);
+    }
+
+    #[Test]
+    public function buildora_resource_uses_the_navigation_trait(): void
+    {
+        $traits = (new ReflectionClass(BuildoraResource::class))->getTraitNames();
+
+        $this->assertContains(HasResourceNavigation::class, $traits);
+    }
+
+    #[Test]
+    public function navigation_methods_are_no_longer_inlined_in_buildora_resource(): void
+    {
+        $resourceSource = file_get_contents(
+            (new ReflectionClass(BuildoraResource::class))->getFileName()
+        );
+
+        foreach (['title', 'searchResultConfig', 'showInNavigation', 'slug'] as $movedMethod) {
+            $this->assertStringNotContainsString(
+                "function {$movedMethod}(",
+                $resourceSource,
+                "Method '{$movedMethod}' has been re-inlined into BuildoraResource.php — it should live in HasResourceNavigation trait."
+            );
+        }
+
+        $traitSource = file_get_contents(
+            (new ReflectionClass(HasResourceNavigation::class))->getFileName()
+        );
+
+        foreach (['title', 'searchResultConfig', 'showInNavigation', 'slug'] as $movedMethod) {
+            $this->assertStringContainsString(
+                "function {$movedMethod}(",
+                $traitSource,
+                "Method '{$movedMethod}' must be declared in HasResourceNavigation."
+            );
+        }
+    }
+}