diff --git a/app/Http/Controllers/Api/V1/CategoryFieldController.php b/app/Http/Controllers/Api/V1/CategoryFieldController.php
new file mode 100644
index 0000000..95b950e
--- /dev/null
+++ b/app/Http/Controllers/Api/V1/CategoryFieldController.php
@@ -0,0 +1,71 @@
+<?php
+
+namespace App\Http\Controllers\Api\V1;
+
+use App\Http\Controllers\Controller;
+use Illuminate\Http\Request;
+use App\Services\CategoryFieldService;
+use App\Helpers\ApiResponse;
+
+class CategoryFieldController extends Controller
+{
+    public function __construct(private CategoryFieldService $service) {}
+
+    // GET /categories/{id}/fields
+    public function index(int $id, Request $request)
+    {
+        return ApiResponse::handle(function () use ($id, $request) {
+            return $this->service->index($id, $request->all());
+        }, '카테고리 필드 목록');
+    }
+
+    // POST /categories/{id}/fields
+    public function store(int $id, Request $request)
+    {
+        return ApiResponse::handle(function () use ($id, $request) {
+            return $this->service->store($id, $request->all());
+        }, '카테고리 필드 생성');
+    }
+
+    // GET /categories/fields/{field}
+    public function show(int $field)
+    {
+        return ApiResponse::handle(function () use ($field) {
+            return $this->service->show($field);
+        }, '카테고리 필드 조회');
+    }
+
+    // PATCH /categories/fields/{field}
+    public function update(int $field, Request $request)
+    {
+        return ApiResponse::handle(function () use ($field, $request) {
+            return $this->service->update($field, $request->all());
+        }, '카테고리 필드 수정');
+    }
+
+    // DELETE /categories/fields/{field}
+    public function destroy(int $field)
+    {
+        return ApiResponse::handle(function () use ($field) {
+            $this->service->destroy($field);
+            return 'success';
+        }, '카테고리 필드 삭제');
+    }
+
+    // POST /categories/{id}/fields/reorder
+    public function reorder(int $id, Request $request)
+    {
+        return ApiResponse::handle(function () use ($id, $request) {
+            $this->service->reorder($id, $request->input());
+            return 'success';
+        }, '카테고리 필드 정렬 저장');
+    }
+
+    // PUT /categories/{id}/fields/bulk-upsert
+    public function bulkUpsert(int $id, Request $request)
+    {
+        return ApiResponse::handle(function () use ($id, $request) {
+            return $this->service->bulkUpsert($id, $request->input('items', []));
+        }, '카테고리 필드 일괄 업서트');
+    }
+}
diff --git a/app/Http/Controllers/Api/V1/CategoryLogController.php b/app/Http/Controllers/Api/V1/CategoryLogController.php
new file mode 100644
index 0000000..b99c198
--- /dev/null
+++ b/app/Http/Controllers/Api/V1/CategoryLogController.php
@@ -0,0 +1,29 @@
+<?php
+
+namespace App\Http\Controllers\Api\V1;
+
+use App\Http\Controllers\Controller;
+use Illuminate\Http\Request;
+use App\Services\CategoryLogService;
+use App\Helpers\ApiResponse;
+
+class CategoryLogController extends Controller
+{
+    public function __construct(private CategoryLogService $service) {}
+
+    // GET /categories/{id}/logs
+    public function index(int $id, Request $request)
+    {
+        return ApiResponse::handle(function () use ($id, $request) {
+            return $this->service->index($id, $request->all());
+        }, '카테고리 변경이력 목록');
+    }
+
+    // GET /categories/logs/{log}
+    public function show(int $log)
+    {
+        return ApiResponse::handle(function () use ($log) {
+            return $this->service->show($log);
+        }, '카테고리 변경이력 조회');
+    }
+}
diff --git a/app/Http/Controllers/Api/V1/CategoryTemplateController.php b/app/Http/Controllers/Api/V1/CategoryTemplateController.php
new file mode 100644
index 0000000..cd92cb1
--- /dev/null
+++ b/app/Http/Controllers/Api/V1/CategoryTemplateController.php
@@ -0,0 +1,79 @@
+<?php
+
+namespace App\Http\Controllers\Api\V1;
+
+use App\Http\Controllers\Controller;
+use Illuminate\Http\Request;
+use App\Services\CategoryTemplateService;
+use App\Helpers\ApiResponse;
+
+class CategoryTemplateController extends Controller
+{
+    public function __construct(private CategoryTemplateService $service) {}
+
+    // GET /categories/{id}/templates
+    public function index(int $id, Request $request)
+    {
+        return ApiResponse::handle(function () use ($id, $request) {
+            return $this->service->index($id, $request->all());
+        }, '카테고리 템플릿 목록');
+    }
+
+    // POST /categories/{id}/templates
+    public function store(int $id, Request $request)
+    {
+        return ApiResponse::handle(function () use ($id, $request) {
+            return $this->service->store($id, $request->all());
+        }, '카테고리 템플릿 생성');
+    }
+
+    // GET /categories/templates/{tpl}
+    public function show(int $tpl)
+    {
+        return ApiResponse::handle(function () use ($tpl) {
+            return $this->service->show($tpl);
+        }, '카테고리 템플릿 조회');
+    }
+
+    // PATCH /categories/templates/{tpl}
+    public function update(int $tpl, Request $request)
+    {
+        return ApiResponse::handle(function () use ($tpl, $request) {
+            return $this->service->update($tpl, $request->all());
+        }, '카테고리 템플릿 수정');
+    }
+
+    // DELETE /categories/templates/{tpl}
+    public function destroy(int $tpl)
+    {
+        return ApiResponse::handle(function () use ($tpl) {
+            $this->service->destroy($tpl);
+            return 'success';
+        }, '카테고리 템플릿 삭제');
+    }
+
+    // POST /categories/{id}/templates/{tpl}/apply
+    public function apply(int $id, int $tpl)
+    {
+        return ApiResponse::handle(function () use ($id, $tpl) {
+            $this->service->apply($id, $tpl);
+            return 'success';
+        }, '카테고리 템플릿 적용');
+    }
+
+    // GET /categories/{id}/templates/{tpl}/preview
+    public function preview(int $id, int $tpl)
+    {
+        return ApiResponse::handle(function () use ($id, $tpl) {
+            return $this->service->preview($id, $tpl);
+        }, '카테고리 템플릿 미리보기');
+    }
+
+    // GET /categories/{id}/templates/diff?a=&b=
+    public function diff(int $id, Request $request)
+    {
+        return ApiResponse::handle(function () use ($id, $request) {
+            return $this->service->diff($id, (int)$request->query('a'), (int)$request->query('b'));
+        }, '카테고리 템플릿 비교');
+    }
+}
diff --git a/app/Http/Controllers/Api/V1/ProductBomItemController.php b/app/Http/Controllers/Api/V1/ProductBomItemController.php
new file mode 100644
index 0000000..33308d3
--- /dev/null
+++ b/app/Http/Controllers/Api/V1/ProductBomItemController.php
@@ -0,0 +1,71 @@
+<?php
+
+namespace App\Http\Controllers\Api\V1;
+
+use App\Helpers\ApiResponse;
+use App\Http\Controllers\Controller;
+use App\Services\ProductBomService;
+use Illuminate\Http\Request;
+
+class ProductBomItemController extends Controller
+{
+    public function __construct(private ProductBomService $service) {}
+
+    // GET /products/{id}/bom/items
+    public function index(int $id, Request $request)
+    {
+        return ApiResponse::handle(function () use ($id, $request) {
+            return $this->service->index($id, $request->all());
+        }, 'BOM 항목 목록');
+    }
+
+    // POST /products/{id}/bom/items/bulk
+    public function bulkUpsert(int $id, Request $request)
+    {
+        return ApiResponse::handle(function () use ($id, $request) {
+            return $this->service->bulkUpsert($id, $request->input('items', []));
+        }, 'BOM 일괄 업서트');
+    }
+
+    // PATCH /products/{id}/bom/items/{item}
+    public function update(int $id, int $item, Request $request)
+    {
+        return ApiResponse::handle(function () use ($id, $item, $request) {
+            return $this->service->update($id, $item, $request->all());
+        }, 'BOM 항목 수정');
+    }
+
+    // DELETE /products/{id}/bom/items/{item}
+    public function destroy(int $id, int $item)
+    {
+        return ApiResponse::handle(function () use ($id, $item) {
+            $this->service->destroy($id, $item);
+            return 'success';
+        }, 'BOM 항목 삭제');
+    }
+
+    // POST /products/{id}/bom/items/reorder
+    public function reorder(int $id, Request $request)
+    {
+        return ApiResponse::handle(function () use ($id, $request) {
+            $this->service->reorder($id, $request->input('items', []));
+            return 'success';
+        }, 'BOM 정렬 변경');
+    }
+
+    // GET /products/{id}/bom/summary
+    public function summary(int $id)
+    {
+        return ApiResponse::handle(function () use ($id) {
+            return $this->service->summary($id);
+        }, 'BOM 요약');
+    }
+
+    // GET /products/{id}/bom/validate
+    public function validateBom(int $id)
+    {
+        return ApiResponse::handle(function () use ($id) {
+            return $this->service->validateBom($id);
+        }, 'BOM 유효성 검사');
+    }
+}
diff --git a/app/Http/Controllers/Api/V1/ProductController.php b/app/Http/Controllers/Api/V1/ProductController.php
index 176e9ac..2c393d5 100644
--- a/app/Http/Controllers/Api/V1/ProductController.php
+++ b/app/Http/Controllers/Api/V1/ProductController.php
@@ -10,56 +10,70 @@
 
 class ProductController extends Controller
 {
-    public function index(Request $request)
-    {
-       //
-    }
+    public function __construct(private ProductService $service) {}
 
     public function getCategory(Request $request)
     {
         return ApiResponse::handle(function () use ($request) {
-            return ProductService::getCategory($request);
+            return $this->service->getCategory($request);
         }, '제품 카테고리 조회');
     }
 
-
-    /**
-     * Show the form for creating a new resource.
-     */
-    public function create()
+    // GET /products
+    public function index(Request $request)
     {
-        //
+        return ApiResponse::handle(function () use ($request) {
+            return $this->service->index($request->all());
+        }, '제품 목록');
     }
 
-    /**
-     * Store a newly created resource in storage.
-     */
+    // POST /products
     public function store(Request $request)
     {
-        //
+        return ApiResponse::handle(function () use ($request) {
+            return $this->service->store($request->all());
+        }, '제품 생성');
     }
 
-
-    public function show(Request $request, $userNo)
+    // GET /products/{id}
+    public function show(int $id)
     {
-        //
+        return ApiResponse::handle(function () use ($id) {
+            return $this->service->show($id);
+        }, '제품 단건');
     }
 
-
-    /**
-     * Show the form for editing the specified resource.
-     */
-    public function edit(string $id)
+    // PATCH /products/{id}
+    public function update(int $id, Request $request)
     {
-        //
+        return ApiResponse::handle(function () use ($id, $request) {
+            return $this->service->update($id, $request->all());
+        }, '제품 수정');
     }
 
-    /**
-     * Update the specified resource in storage.
-     */
-    public function update(Request $request, string $id)
+    // DELETE /products/{id}
+    public function destroy(int $id)
     {
-        //
+        return ApiResponse::handle(function () use ($id) {
+            $this->service->destroy($id);
+            return 'success';
+        }, '제품 삭제');
+    }
+
+    // GET /products/search
+    public function search(Request $request)
+    {
+        return ApiResponse::handle(function () use ($request) {
+            return $this->service->search($request->all());
+        }, '제품 검색');
+    }
+
+    // POST /products/{id}/toggle
+    public function toggle(int $id)
+    {
+        return ApiResponse::handle(function () use ($id) {
+            return $this->service->toggle($id);
+        }, '제품 활성 토글');
     }
 }
 
diff --git a/app/Models/Products/ProductComponent.php b/app/Models/Products/ProductComponent.php
index e2f92e9..9fab41b 100644
--- a/app/Models/Products/ProductComponent.php
+++ b/app/Models/Products/ProductComponent.php
@@ -2,29 +2,92 @@
 
 namespace App\Models\Products;
 
-use App\Traits\BelongsToTenant;
-use App\Traits\ModelTrait;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\SoftDeletes;
+use App\Traits\ModelTrait;
+use App\Traits\BelongsToTenant;
 
 class ProductComponent extends Model
 {
-    use SoftDeletes, BelongsToTenant, ModelTrait;
+    use SoftDeletes, ModelTrait, BelongsToTenant;
 
     protected $table = 'product_components';
 
     protected $fillable = [
-        'tenant_id','parent_product_id','child_product_id',
-        'quantity','sort_order','is_default',
-        'created_by','updated_by'
+        'tenant_id',
+        'parent_product_id',
+        'ref_type',
+        'child_product_id',
+        'material_id',
+        'quantity',
+        'sort_order',
+        'is_default',
+        'created_by',
+        'updated_by',
     ];
 
     protected $casts = [
         'quantity'   => 'decimal:4',
-        'sort_order' => 'integer',
         'is_default' => 'boolean',
+        'created_at' => 'datetime',
+        'updated_at' => 'datetime',
+        'deleted_at' => 'datetime',
     ];
 
-    public function parent() { return $this->belongsTo(Product::class, 'parent_product_id'); }
-    public function child()  { return $this->belongsTo(Product::class, 'child_product_id'); }
+    protected $hidden = [
+        'deleted_at',
+    ];
+
+
+    /**
+     * 상위 제품 (모델/제품)
+     */
+    public function parentProduct()
+    {
+        return $this->belongsTo(Product::class, 'parent_product_id');
+    }
+
+    /**
+     * 하위 제품 (ref_type = PRODUCT일 때만 의미 있음)
+     */
+    public function childProduct()
+    {
+        return $this->belongsTo(Product::class, 'child_product_id');
+    }
+
+    /**
+     * 하위 자재 (ref_type = MATERIAL일 때만 의미 있음)
+     */
+    public function material()
+    {
+        return $this->belongsTo(\App\Models\Materials\Material::class, 'material_id');
+    }
+
+    // ---------------------------------------------------
+    // 🔎 Query Scopes
+    // ---------------------------------------------------
+
+    /**
+     * 제품 BOM 아이템만
+     */
+    public function scopeProducts($query)
+    {
+        return $query->where('ref_type', 'PRODUCT');
+    }
+
+    /**
+     * 자재 BOM 아이템만
+     */
+    public function scopeMaterials($query)
+    {
+        return $query->where('ref_type', 'MATERIAL');
+    }
+
+    /**
+     * 특정 상위 제품의 BOM
+     */
+    public function scopeForParent($query, int $parentProductId)
+    {
+        return $query->where('parent_product_id', $parentProductId);
+    }
 }
diff --git a/app/Services/CategoryFieldService.php b/app/Services/CategoryFieldService.php
new file mode 100644
index 0000000..a21b5b9
--- /dev/null
+++ b/app/Services/CategoryFieldService.php
@@ -0,0 +1,246 @@
+<?php
+
+namespace App\Services;
+
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Validator;
+use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
+use App\Models\Commons\CategoryField; // 가정: Eloquent 모델 경로
+use App\Models\Commons\Category;
+
+class CategoryFieldService extends Service
+{
+    public function index(int $categoryId, array $params)
+    {
+        $tenantId = $this->tenantId();
+
+        $size = (int)($params['size'] ?? 20);
+        $sort = $params['sort'] ?? 'sort_order';
+        $order = strtolower($params['order'] ?? 'asc') === 'desc' ? 'desc' : 'asc';
+
+        return CategoryField::query()
+            ->where('tenant_id', $tenantId)
+            ->where('category_id', $categoryId)
+            ->orderBy($sort, $order)
+            ->paginate($size);
+    }
+
+    public function store(int $categoryId, array $data)
+    {
+        $tenantId = $this->tenantId();
+        $userId   = $this->apiUserId();
+
+        $this->assertCategoryExists($tenantId, $categoryId);
+
+        $v = Validator::make($data, [
+            'field_key'     => 'required|string|max:30|alpha_dash',
+            'field_name'    => 'required|string|max:100',
+            'field_type'    => 'required|string|max:20',
+            'is_required'   => 'nullable|in:Y,N',
+            'sort_order'    => 'nullable|integer|min:0',
+            'default_value' => 'nullable|string|max:100',
+            'options'       => 'nullable|json',
+            'description'   => 'nullable|string|max:255',
+        ]);
+        $payload = $v->validate();
+
+        // 카테고리 내 field_key 유니크 검증
+        $exists = CategoryField::query()
+            ->where(compact('tenant_id'))
+            ->where('category_id', $categoryId)
+            ->where('field_key', $payload['field_key'])
+            ->exists();
+        if ($exists) {
+            throw new BadRequestHttpException(__('error.duplicate_key')); // ko/error.php에 매핑
+        }
+
+        $payload['tenant_id']   = $tenantId;
+        $payload['category_id'] = $categoryId;
+        $payload['is_required'] = $payload['is_required'] ?? 'N';
+        $payload['sort_order']  = $payload['sort_order'] ?? 0;
+        $payload['created_by']  = $userId;
+
+        return CategoryField::create($payload);
+    }
+
+    public function show(int $fieldId)
+    {
+        $tenantId = $this->tenantId();
+
+        $field = CategoryField::query()
+            ->where('tenant_id', $tenantId)
+            ->find($fieldId);
+
+        if (!$field) {
+            throw new BadRequestHttpException(__('error.not_found'));
+        }
+        return $field;
+    }
+
+    public function update(int $fieldId, array $data)
+    {
+        $tenantId = $this->tenantId();
+        $userId   = $this->apiUserId();
+
+        $field = CategoryField::query()
+            ->where('tenant_id', $tenantId)
+            ->find($fieldId);
+
+        if (!$field) {
+            throw new BadRequestHttpException(__('error.not_found'));
+        }
+
+        $v = Validator::make($data, [
+            'field_key'     => 'sometimes|string|max:30|alpha_dash',
+            'field_name'    => 'sometimes|string|max:100',
+            'field_type'    => 'sometimes|string|max:20',
+            'is_required'   => 'sometimes|in:Y,N',
+            'sort_order'    => 'sometimes|integer|min:0',
+            'default_value' => 'nullable|string|max:100',
+            'options'       => 'nullable|json',
+            'description'   => 'nullable|string|max:255',
+        ]);
+        $payload = $v->validate();
+
+        if (isset($payload['field_key']) && $payload['field_key'] !== $field->field_key) {
+            $dup = CategoryField::query()
+                ->where('tenant_id', $tenantId)
+                ->where('category_id', $field->category_id)
+                ->where('field_key', $payload['field_key'])
+                ->exists();
+            if ($dup) {
+                throw new BadRequestHttpException(__('error.duplicate_key'));
+            }
+        }
+
+        $payload['updated_by'] = $userId;
+        $field->update($payload);
+        return $field->refresh();
+    }
+
+    public function destroy(int $fieldId): void
+    {
+        $tenantId = $this->tenantId();
+        $field = CategoryField::query()
+            ->where('tenant_id', $tenantId)
+            ->find($fieldId);
+
+        if (!$field) {
+            throw new BadRequestHttpException(__('error.not_found'));
+        }
+        $field->delete();
+    }
+
+    public function reorder(int $categoryId, array $items): void
+    {
+        $tenantId = $this->tenantId();
+        $this->assertCategoryExists($tenantId, $categoryId);
+
+        $rows = $items['items'] ?? $items; // 둘 다 허용
+        if (!is_array($rows)) {
+            throw new BadRequestHttpException(__('error.invalid_payload'));
+        }
+
+        DB::transaction(function () use ($tenantId, $categoryId, $rows) {
+            foreach ($rows as $row) {
+                if (!isset($row['id'], $row['sort_order'])) continue;
+                CategoryField::query()
+                    ->where('tenant_id', $tenantId)
+                    ->where('category_id', $categoryId)
+                    ->where('id', $row['id'])
+                    ->update(['sort_order' => (int)$row['sort_order']]);
+            }
+        });
+    }
+
+    public function bulkUpsert(int $categoryId, array $items): array
+    {
+        $tenantId = $this->tenantId();
+        $userId   = $this->apiUserId();
+        $this->assertCategoryExists($tenantId, $categoryId);
+
+        if (!is_array($items) || empty($items)) {
+            throw new BadRequestHttpException(__('error.empty_items'));
+        }
+
+        $result = ['created' => 0, 'updated' => 0];
+
+        DB::transaction(function () use ($tenantId, $userId, $categoryId, $items, &$result) {
+            foreach ($items as $it) {
+                $v = Validator::make($it, [
+                    'id'            => 'nullable|integer',
+                    'field_key'     => 'sometimes|required_without:id|string|max:30|alpha_dash',
+                    'field_name'    => 'required|string|max:100',
+                    'field_type'    => 'required|string|max:20',
+                    'is_required'   => 'nullable|in:Y,N',
+                    'sort_order'    => 'nullable|integer|min:0',
+                    'default_value' => 'nullable|string|max:100',
+                    'options'       => 'nullable|json',
+                    'description'   => 'nullable|string|max:255',
+                ]);
+                $payload = $v->validate();
+
+                if (!empty($payload['id'])) {
+                    $model = CategoryField::query()
+                        ->where('tenant_id', $tenantId)
+                        ->where('category_id', $categoryId)
+                        ->find($payload['id']);
+                    if (!$model) {
+                        throw new BadRequestHttpException(__('error.not_found'));
+                    }
+
+                    // field_key 변경 유니크 검사
+                    if (isset($payload['field_key']) && $payload['field_key'] !== $model->field_key) {
+                        $dup = CategoryField::query()
+                            ->where('tenant_id', $tenantId)
+                            ->where('category_id', $categoryId)
+                            ->where('field_key', $payload['field_key'])
+                            ->exists();
+                        if ($dup) {
+                            throw new BadRequestHttpException(__('error.duplicate_key'));
+                        }
+                    }
+
+                    $payload['updated_by'] = $userId;
+                    $model->update($payload);
+                    $result['updated']++;
+                } else {
+                    // 신규 생성
+                    if (empty($payload['field_key'])) {
+                        throw new BadRequestHttpException(__('error.required', ['attr' => 'field_key']));
+                    }
+                    $dup = CategoryField::query()
+                        ->where('tenant_id', $tenantId)
+                        ->where('category_id', $categoryId)
+                        ->where('field_key', $payload['field_key'])
+                        ->exists();
+                    if ($dup) {
+                        throw new BadRequestHttpException(__('error.duplicate_key'));
+                    }
+
+                    $payload['tenant_id']   = $tenantId;
+                    $payload['category_id'] = $categoryId;
+                    $payload['is_required'] = $payload['is_required'] ?? 'N';
+                    $payload['sort_order']  = $payload['sort_order'] ?? 0;
+                    $payload['created_by']  = $userId;
+
+                    CategoryField::create($payload);
+                    $result['created']++;
+                }
+            }
+        });
+
+        return $result;
+    }
+
+    private function assertCategoryExists(int $tenantId, int $categoryId): void
+    {
+        $exists = Category::query()
+            ->where('tenant_id', $tenantId)
+            ->where('id', $categoryId)
+            ->exists();
+        if (!$exists) {
+            throw new BadRequestHttpException(__('error.category_not_found'));
+        }
+    }
+}
diff --git a/app/Services/CategoryLogService.php b/app/Services/CategoryLogService.php
new file mode 100644
index 0000000..dc34efc
--- /dev/null
+++ b/app/Services/CategoryLogService.php
@@ -0,0 +1,42 @@
+<?php
+
+namespace App\Services;
+
+use Illuminate\Support\Carbon;
+use App\Models\Commons\CategoryLog;
+
+class CategoryLogService extends Service
+{
+    public function index(int $categoryId, array $params)
+    {
+        $tenantId = $this->tenantId();
+
+        $size   = (int)($params['size'] ?? 20);
+        $action = $params['action'] ?? null; // insert|update|delete
+        $from   = $params['from']   ?? null; // Y-m-d
+        $to     = $params['to']     ?? null;
+
+        $q = CategoryLog::query()
+            ->where('tenant_id', $tenantId)
+            ->where('category_id', $categoryId)
+            ->orderByDesc('changed_at');
+
+        if ($action) $q->where('action', $action);
+        if ($from)   $q->whereDate('changed_at', '>=', Carbon::parse($from)->toDateString());
+        if ($to)     $q->whereDate('changed_at', '<=', Carbon::parse($to)->toDateString());
+
+        return $q->paginate($size);
+    }
+
+    public function show(int $logId)
+    {
+        $tenantId = $this->tenantId();
+
+        $log = CategoryLog::query()
+            ->where('tenant_id', $tenantId)
+            ->find($logId);
+
+        if (!$log) throw new BadRequestHttpException(__('error.not_found'));
+        return $log;
+    }
+}
diff --git a/app/Services/CategoryTemplateService.php b/app/Services/CategoryTemplateService.php
new file mode 100644
index 0000000..ff21392
--- /dev/null
+++ b/app/Services/CategoryTemplateService.php
@@ -0,0 +1,194 @@
+<?php
+
+namespace App\Services;
+
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Validator;
+use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
+use App\Models\Commons\CategoryTemplate;
+use App\Models\Commons\Category;
+use App\Models\Commons\CategoryField;
+
+class CategoryTemplateService extends Service
+{
+    public function index(int $categoryId, array $params)
+    {
+        $tenantId = $this->tenantId();
+        $size = (int)($params['size'] ?? 20);
+
+        return CategoryTemplate::query()
+            ->where('tenant_id', $tenantId)
+            ->where('category_id', $categoryId)
+            ->orderByDesc('version_no')
+            ->paginate($size);
+    }
+
+    public function store(int $categoryId, array $data)
+    {
+        $tenantId = $this->tenantId();
+        $userId   = $this->apiUserId();
+        $this->assertCategoryExists($tenantId, $categoryId);
+
+        $v = Validator::make($data, [
+            'version_no'    => 'required|integer|min:1',
+            'template_json' => 'required|json',
+            'applied_at'    => 'required|date',
+            'remarks'       => 'nullable|string|max:255',
+        ]);
+        $payload = $v->validate();
+
+        $dup = CategoryTemplate::query()
+            ->where('tenant_id', $tenantId)
+            ->where('category_id', $categoryId)
+            ->where('version_no', $payload['version_no'])
+            ->exists();
+        if ($dup) {
+            throw new BadRequestHttpException(__('error.duplicate_key')); // version_no 중복
+        }
+
+        $payload['tenant_id']   = $tenantId;
+        $payload['category_id'] = $categoryId;
+        $payload['created_by']  = $userId;
+
+        return CategoryTemplate::create($payload);
+    }
+
+    public function show(int $tplId)
+    {
+        $tenantId = $this->tenantId();
+
+        $tpl = CategoryTemplate::query()
+            ->where('tenant_id', $tenantId)
+            ->find($tplId);
+
+        if (!$tpl) throw new BadRequestHttpException(__('error.not_found'));
+        return $tpl;
+    }
+
+    public function update(int $tplId, array $data)
+    {
+        $tenantId = $this->tenantId();
+        $userId   = $this->apiUserId();
+
+        $tpl = CategoryTemplate::query()
+            ->where('tenant_id', $tenantId)
+            ->find($tplId);
+
+        if (!$tpl) throw new BadRequestHttpException(__('error.not_found'));
+
+        $v = Validator::make($data, [
+            'template_json' => 'nullable|json',
+            'applied_at'    => 'nullable|date',
+            'remarks'       => 'nullable|string|max:255',
+        ]);
+        $payload = $v->validate();
+        $payload['updated_by'] = $userId;
+
+        $tpl->update($payload);
+        return $tpl->refresh();
+    }
+
+    public function destroy(int $tplId): void
+    {
+        $tenantId = $this->tenantId();
+
+        $tpl = CategoryTemplate::query()
+            ->where('tenant_id', $tenantId)
+            ->find($tplId);
+
+        if (!$tpl) throw new BadRequestHttpException(__('error.not_found'));
+        $tpl->delete();
+    }
+
+    /**
+     * 적용 정책:
+     * - categories.active_template_version (또는 별도 맵 테이블)에 version_no 반영
+     * - (옵션) template_json 기반으로 category_fields를 실제로 갱신하려면 여기서 동기화
+     */
+    public function apply(int $categoryId, int $tplId): void
+    {
+        $tenantId = $this->tenantId();
+        $userId   = $this->apiUserId();
+
+        $tpl = CategoryTemplate::query()
+            ->where('tenant_id', $tenantId)
+            ->where('category_id', $categoryId)
+            ->find($tplId);
+
+        if (!$tpl) throw new BadRequestHttpException(__('error.not_found'));
+
+        DB::transaction(function () use ($tenantId, $userId, $categoryId, $tpl) {
+            // 1) categories 테이블에 활성 버전 반영(컬럼이 있다면)
+            // Category::where('tenant_id', $tenantId)->where('id', $categoryId)->update([
+            //     'active_template_version' => $tpl->version_no,
+            //     'updated_by' => $userId,
+            // ]);
+
+            // 2) (선택) template_json → category_fields 동기화
+            //    - 추가/수정/삭제 전략은 운영정책에 맞게 구현
+            //    - 여기서는 예시로 "fields" 배열만 처리
+            // $snapshot = json_decode($tpl->template_json, true);
+            // foreach (($snapshot['fields'] ?? []) as $i => $f) {
+            //     // key, name, type, required, default, options 매핑 ...
+            // }
+        });
+    }
+
+    public function preview(int $categoryId, int $tplId): array
+    {
+        $tenantId = $this->tenantId();
+
+        $tpl = CategoryTemplate::query()
+            ->where('tenant_id', $tenantId)
+            ->where('category_id', $categoryId)
+            ->find($tplId);
+
+        if (!$tpl) throw new BadRequestHttpException(__('error.not_found'));
+
+        $json = json_decode($tpl->template_json, true);
+        if (!is_array($json)) {
+            throw new BadRequestHttpException(__('error.invalid_payload'));
+        }
+        // 프론트 렌더링 편의 구조로 가공 가능
+        return $json;
+    }
+
+    public function diff(int $categoryId, int $a, int $b): array
+    {
+        $tenantId = $this->tenantId();
+
+        $aTpl = CategoryTemplate::query()
+            ->where('tenant_id', $tenantId)->where('category_id', $categoryId)
+            ->where('version_no', $a)->first();
+
+        $bTpl = CategoryTemplate::query()
+            ->where('tenant_id', $tenantId)->where('category_id', $categoryId)
+            ->where('version_no', $b)->first();
+
+        if (!$aTpl || !$bTpl) throw new BadRequestHttpException(__('error.not_found'));
+
+        $aj = json_decode($aTpl->template_json, true) ?: [];
+        $bj = json_decode($bTpl->template_json, true) ?: [];
+
+        // 아주 단순한 diff 예시 (fields 키만 비교)
+        $aKeys = collect($aj['fields'] ?? [])->pluck('key')->all();
+        $bKeys = collect($bj['fields'] ?? [])->pluck('key')->all();
+
+        return [
+            'added'   => array_values(array_diff($bKeys, $aKeys)),
+            'removed' => array_values(array_diff($aKeys, $bKeys)),
+            // 변경(diff in detail)은 정책에 맞게 확장
+        ];
+    }
+
+    private function assertCategoryExists(int $tenantId, int $categoryId): void
+    {
+        $exists = Category::query()
+            ->where('tenant_id', $tenantId)
+            ->where('id', $categoryId)
+            ->exists();
+        if (!$exists) {
+            throw new BadRequestHttpException(__('error.category_not_found'));
+        }
+    }
+}
diff --git a/app/Services/ProductBomService.php b/app/Services/ProductBomService.php
new file mode 100644
index 0000000..8dfdafd
--- /dev/null
+++ b/app/Services/ProductBomService.php
@@ -0,0 +1,335 @@
+<?php
+
+namespace App\Services;
+
+use App\Models\Materials\Material;
+use App\Models\Products\Product;
+use App\Models\Products\ProductComponent;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Validator;
+use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
+
+class ProductBomService extends Service
+{
+    /**
+     * 목록: 제품/자재를 통합 반환
+     * - 반환 형태 예:
+     *   [
+     *     { "id": 10, "ref_type": "PRODUCT", "ref_id": 3, "code": "P-003", "name": "모듈A", "quantity": "2.0000", "sort_order": 1, "is_default": 1 },
+     *     { "id": 11, "ref_type": "MATERIAL", "ref_id": 5, "code": "M-005", "name": "알루미늄판", "unit":"EA", "quantity": "4.0000", "sort_order": 2 }
+     *   ]
+     */
+    public function index(int $parentProductId, array $params)
+    {
+        $tenantId = $this->tenantId();
+
+        // 부모 제품 유효성
+        $this->assertProduct($tenantId, $parentProductId);
+
+        $items = ProductComponent::query()
+            ->where('tenant_id', $tenantId)
+            ->where('parent_product_id', $parentProductId)
+            ->orderBy('sort_order')
+            ->get();
+
+        // 리졸브(제품/자재)
+        $productIds  = $items->where('ref_type', 'PRODUCT')->pluck('child_product_id')->filter()->unique()->values();
+        $materialIds = $items->where('ref_type', 'MATERIAL')->pluck('material_id')->filter()->unique()->values();
+
+        $products  = $productIds->isNotEmpty()
+            ? Product::query()->where('tenant_id', $tenantId)->whereIn('id', $productIds)->get(['id','code','name','product_type','category_id'])->keyBy('id')
+            : collect();
+
+        $materials = $materialIds->isNotEmpty()
+            ? Material::query()->where('tenant_id', $tenantId)->whereIn('id', $materialIds)->get(['id','material_code as code','name','unit','category_id'])->keyBy('id')
+            : collect();
+
+        return $items->map(function ($row) use ($products, $materials) {
+            $base = [
+                'id'         => (int)$row->id,
+                'ref_type'   => $row->ref_type,
+                'quantity'   => $row->quantity,
+                'sort_order' => (int)$row->sort_order,
+                'is_default' => (int)$row->is_default,
+            ];
+
+            if ($row->ref_type === 'PRODUCT') {
+                $p = $products->get($row->child_product_id);
+                return $base + [
+                        'ref_id' => (int)$row->child_product_id,
+                        'code'   => $p?->code,
+                        'name'   => $p?->name,
+                        'product_type' => $p?->product_type,
+                        'category_id'  => $p?->category_id,
+                    ];
+            } else { // MATERIAL
+                $m = $materials->get($row->material_id);
+                return $base + [
+                        'ref_id' => (int)$row->material_id,
+                        'code'   => $m?->code,
+                        'name'   => $m?->name,
+                        'unit'   => $m?->unit,
+                        'category_id' => $m?->category_id,
+                    ];
+            }
+        })->values();
+    }
+
+    /**
+     * 일괄 업서트
+     * items[]: { id?, ref_type: PRODUCT|MATERIAL, ref_id: int, quantity: number, sort_order?: int, is_default?: 0|1 }
+     */
+    public function bulkUpsert(int $parentProductId, array $items): array
+    {
+        $tenantId = $this->tenantId();
+        $userId   = $this->apiUserId();
+
+        $this->assertProduct($tenantId, $parentProductId);
+
+        if (!is_array($items) || empty($items)) {
+            throw new BadRequestHttpException(__('error.empty_items'));
+        }
+
+        $created = 0; $updated = 0;
+
+        DB::transaction(function () use ($tenantId, $userId, $parentProductId, $items, &$created, &$updated) {
+            foreach ($items as $it) {
+                $payload = $this->validateItem($it);
+
+                // ref 확인 & 자기참조 방지
+                $this->assertReference($tenantId, $parentProductId, $payload['ref_type'], (int)$payload['ref_id']);
+
+                if (!empty($it['id'])) {
+                    $pc = ProductComponent::query()
+                        ->where('tenant_id', $tenantId)
+                        ->where('parent_product_id', $parentProductId)
+                        ->find((int)$it['id']);
+                    if (!$pc) throw new BadRequestHttpException(__('error.not_found'));
+
+                    // ref 변경 허용 시: 충돌 검사
+                    [$childProductId, $materialId] = $this->splitRef($payload);
+
+                    $pc->update([
+                        'ref_type'         => $payload['ref_type'],
+                        'child_product_id' => $childProductId,
+                        'material_id'      => $materialId,
+                        'quantity'         => $payload['quantity'],
+                        'sort_order'       => $payload['sort_order'] ?? $pc->sort_order,
+                        'is_default'       => $payload['is_default'] ?? $pc->is_default,
+                        'updated_by'       => $userId,
+                    ]);
+                    $updated++;
+                } else {
+                    // 신규
+                    [$childProductId, $materialId] = $this->splitRef($payload);
+
+                    ProductComponent::create([
+                        'tenant_id'         => $tenantId,
+                        'parent_product_id' => $parentProductId,
+                        'ref_type'          => $payload['ref_type'],
+                        'child_product_id'  => $childProductId,
+                        'material_id'       => $materialId,
+                        'quantity'          => $payload['quantity'],
+                        'sort_order'        => $payload['sort_order'] ?? 0,
+                        'is_default'        => $payload['is_default'] ?? 0,
+                        'created_by'        => $userId,
+                    ]);
+                    $created++;
+                }
+            }
+        });
+
+        return compact('created', 'updated');
+    }
+
+    // 단건 수정
+    public function update(int $parentProductId, int $itemId, array $data)
+    {
+        $tenantId = $this->tenantId();
+        $userId   = $this->apiUserId();
+        $this->assertProduct($tenantId, $parentProductId);
+
+        $pc = ProductComponent::query()
+            ->where('tenant_id', $tenantId)
+            ->where('parent_product_id', $parentProductId)
+            ->find($itemId);
+
+        if (!$pc) throw new BadRequestHttpException(__('error.not_found'));
+
+        $v = Validator::make($data, [
+            'ref_type'   => 'sometimes|in:PRODUCT,MATERIAL',
+            'ref_id'     => 'sometimes|integer',
+            'quantity'   => 'sometimes|numeric|min:0.0001',
+            'sort_order' => 'sometimes|integer|min:0',
+            'is_default' => 'sometimes|in:0,1',
+        ]);
+        $payload = $v->validate();
+
+        if (isset($payload['ref_type']) || isset($payload['ref_id'])) {
+            $refType = $payload['ref_type'] ?? $pc->ref_type;
+            $refId   = isset($payload['ref_id'])
+                ? (int)$payload['ref_id']
+                : ($pc->ref_type === 'PRODUCT' ? (int)$pc->child_product_id : (int)$pc->material_id);
+
+            $this->assertReference($tenantId, $parentProductId, $refType, $refId);
+            [$childProductId, $materialId] = $this->splitRef(['ref_type' => $refType, 'ref_id' => $refId]);
+
+            $pc->ref_type = $refType;
+            $pc->child_product_id = $childProductId;
+            $pc->material_id = $materialId;
+        }
+
+        if (isset($payload['quantity']))   $pc->quantity   = $payload['quantity'];
+        if (isset($payload['sort_order'])) $pc->sort_order = $payload['sort_order'];
+        if (isset($payload['is_default'])) $pc->is_default = $payload['is_default'];
+
+        $pc->updated_by = $userId;
+        $pc->save();
+
+        return $pc->refresh();
+    }
+
+    // 삭제
+    public function destroy(int $parentProductId, int $itemId): void
+    {
+        $tenantId = $this->tenantId();
+        $this->assertProduct($tenantId, $parentProductId);
+
+        $pc = ProductComponent::query()
+            ->where('tenant_id', $tenantId)
+            ->where('parent_product_id', $parentProductId)
+            ->find($itemId);
+
+        if (!$pc) throw new BadRequestHttpException(__('error.not_found'));
+        $pc->delete();
+    }
+
+    // 정렬 변경
+    public function reorder(int $parentProductId, array $items): void
+    {
+        $tenantId = $this->tenantId();
+        $this->assertProduct($tenantId, $parentProductId);
+
+        if (!is_array($items)) throw new BadRequestHttpException(__('error.invalid_payload'));
+
+        DB::transaction(function () use ($tenantId, $parentProductId, $items) {
+            foreach ($items as $row) {
+                if (!isset($row['id'], $row['sort_order'])) continue;
+                ProductComponent::query()
+                    ->where('tenant_id', $tenantId)
+                    ->where('parent_product_id', $parentProductId)
+                    ->where('id', (int)$row['id'])
+                    ->update(['sort_order' => (int)$row['sort_order']]);
+            }
+        });
+    }
+
+    // 요약(간단 합계/건수)
+    public function summary(int $parentProductId): array
+    {
+        $tenantId = $this->tenantId();
+        $this->assertProduct($tenantId, $parentProductId);
+
+        $items = ProductComponent::query()
+            ->where('tenant_id', $tenantId)
+            ->where('parent_product_id', $parentProductId)
+            ->get();
+
+        $cnt   = $items->count();
+        $cntP  = $items->where('ref_type','PRODUCT')->count();
+        $cntM  = $items->where('ref_type','MATERIAL')->count();
+        $qtySum = (string)$items->sum('quantity');
+
+        return [
+            'count'         => $cnt,
+            'count_product' => $cntP,
+            'count_material'=> $cntM,
+            'quantity_sum'  => $qtySum,
+        ];
+    }
+
+    // 유효성 검사(중복/자기참조/음수 등)
+    public function validateBom(int $parentProductId): array
+    {
+        $tenantId = $this->tenantId();
+        $this->assertProduct($tenantId, $parentProductId);
+
+        $items = ProductComponent::query()
+            ->where('tenant_id', $tenantId)
+            ->where('parent_product_id', $parentProductId)
+            ->orderBy('sort_order')
+            ->get();
+
+        $errors = [];
+        $seen = [];
+
+        foreach ($items as $row) {
+            if ($row->quantity <= 0) {
+                $errors[] = ['id' => $row->id, 'error' => 'INVALID_QUANTITY'];
+            }
+            $key = $row->ref_type . ':' . ($row->ref_type === 'PRODUCT' ? $row->child_product_id : $row->material_id);
+            if (isset($seen[$key])) {
+                $errors[] = ['id' => $row->id, 'error' => 'DUPLICATE_ITEM'];
+            } else {
+                $seen[$key] = true;
+            }
+            // 자기참조
+            if ($row->ref_type === 'PRODUCT' && (int)$row->child_product_id === (int)$parentProductId) {
+                $errors[] = ['id' => $row->id, 'error' => 'SELF_REFERENCE'];
+            }
+        }
+
+        return [
+            'valid'  => count($errors) === 0,
+            'errors' => $errors,
+        ];
+    }
+
+    // ---------- helpers ----------
+
+    private function validateItem(array $it): array
+    {
+        $v = Validator::make($it, [
+            'id'         => 'nullable|integer',
+            'ref_type'   => 'required|in:PRODUCT,MATERIAL',
+            'ref_id'     => 'required|integer',
+            'quantity'   => 'required|numeric|min:0.0001',
+            'sort_order' => 'nullable|integer|min:0',
+            'is_default' => 'nullable|in:0,1',
+        ]);
+        return $v->validate();
+    }
+
+    private function splitRef(array $payload): array
+    {
+        // returns [child_product_id, material_id]
+        if ($payload['ref_type'] === 'PRODUCT') {
+            return [(int)$payload['ref_id'], null];
+        }
+        return [null, (int)$payload['ref_id']];
+    }
+
+    private function assertProduct(int $tenantId, int $productId): void
+    {
+        $exists = Product::query()->where('tenant_id', $tenantId)->where('id', $productId)->exists();
+        if (!$exists) {
+            // ko: 제품 정보를 찾을 수 없습니다.
+            throw new NotFoundHttpException(__('error.not_found_resource', ['resource' => '제품']));
+        }
+    }
+
+    private function assertReference(int $tenantId, int $parentProductId, string $refType, int $refId): void
+    {
+        if ($refType === 'PRODUCT') {
+            if ($refId === $parentProductId) {
+                throw new BadRequestHttpException(__('error.invalid_payload')); // 자기참조 방지
+            }
+            $ok = Product::query()->where('tenant_id', $tenantId)->where('id', $refId)->exists();
+            if (!$ok) throw new BadRequestHttpException(__('error.not_found'));
+        } else {
+            $ok = Material::query()->where('tenant_id', $tenantId)->where('id', $refId)->exists();
+            if (!$ok) throw new BadRequestHttpException(__('error.not_found'));
+        }
+    }
+}
diff --git a/app/Services/ProductService.php b/app/Services/ProductService.php
index 888908c..baeb004 100644
--- a/app/Services/ProductService.php
+++ b/app/Services/ProductService.php
@@ -3,8 +3,12 @@
 namespace App\Services;
 
 use App\Models\Products\CommonCode;
+use App\Models\Products\Product;
+use App\Models\Commons\Category;
+use Illuminate\Support\Facades\Validator;
+use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
 
-class ProductService
+class ProductService extends Service
 {
 
     /**
@@ -24,16 +28,27 @@ public static function getCategory($request)
     /**
      * 내부 재귀 함수 (하위 카테고리 트리 구조로 구성)
      */
-    protected static function fetchCategoryTree($parentId = null, $group = 'category')
+    protected function fetchCategoryTree(?int $parentId = null)
     {
-        $categories = CommonCode::where('code_group', 'category')
-            ->where('parent_id', $parentId)
-            ->orderBy('sort_order')->debug();
-        $categories =  $categories->get();
+        $tenantId = $this->tenantId(); // Base Service에서 상속받은 메서드
+
+        $query = Category::query()
+            ->when($tenantId, fn($q) => $q->where('tenant_id', $tenantId))
+            ->when(
+                is_null($parentId),
+                fn($q) => $q->whereNull('parent_id'),
+                fn($q) => $q->where('parent_id', $parentId)
+            )
+            ->where('is_active', 1)
+            ->orderBy('sort_order');
+
+        $categories = $query->get();
 
         foreach ($categories as $category) {
-            $category->children = self::fetchCategoryTree($category->id);
+            $children = $this->fetchCategoryTree($category->id);
+            $category->setRelation('children', $children);
         }
+
         return $categories;
     }
 
@@ -46,5 +61,157 @@ public static function getCategoryFlat($group = 'category')
         return $query->get();
     }
 
+    // 목록/검색
+    public function index(array $params)
+    {
+        $tenantId = $this->tenantId();
+
+        $size = (int)($params['size'] ?? 20);
+        $q    = trim((string)($params['q'] ?? ''));
+        $categoryId  = $params['category_id'] ?? null;
+        $productType = $params['product_type'] ?? null; // PRODUCT|PART|SUBASSEMBLY...
+        $active      = $params['active'] ?? null;       // 1/0
+
+        $query = Product::query()->where('tenant_id', $tenantId);
+
+        if ($q !== '') {
+            $query->where(function ($w) use ($q) {
+                $w->where('name', 'like', "%{$q}%")
+                    ->orWhere('code', 'like', "%{$q}%")
+                    ->orWhere('description', 'like', "%{$q}%");
+            });
+        }
+        if ($categoryId)  $query->where('category_id', (int)$categoryId);
+        if ($productType) $query->where('product_type', $productType);
+        if ($active !== null && $active !== '') $query->where('is_active', (int)$active);
+
+        return $query->orderByDesc('id')->paginate($size);
+    }
+
+    // 생성
+    public function store(array $data)
+    {
+        $tenantId = $this->tenantId();
+        $userId   = $this->apiUserId();
+
+        $v = Validator::make($data, [
+            'code'           => 'required|string|max:30',
+            'name'           => 'required|string|max:100',
+            'category_id'    => 'required|integer',
+            'product_type'   => 'required|string|max:30',
+            'attributes'     => 'nullable|array',
+            'description'    => 'nullable|string|max:255',
+            'is_sellable'    => 'nullable|in:0,1',
+            'is_purchasable' => 'nullable|in:0,1',
+            'is_producible'  => 'nullable|in:0,1',
+            'is_active'      => 'nullable|in:0,1',
+        ]);
+        $payload = $v->validate();
+
+        // tenant별 code 유니크 수동 체크(운영 전 DB 유니크 구성도 권장)
+        $dup = Product::query()
+            ->where('tenant_id', $tenantId)
+            ->where('code', $payload['code'])
+            ->exists();
+        if ($dup) throw new BadRequestHttpException(__('error.duplicate_key'));
+
+        $payload['tenant_id']      = $tenantId;
+        $payload['created_by']     = $userId;
+        $payload['is_sellable']    = $payload['is_sellable']    ?? 1;
+        $payload['is_purchasable'] = $payload['is_purchasable'] ?? 0;
+        $payload['is_producible']  = $payload['is_producible']  ?? 1;
+        $payload['is_active']      = $payload['is_active']      ?? 1;
+
+        // attributes array → json 저장 (Eloquent casts가 array면 그대로 가능)
+        return Product::create($payload);
+    }
+
+    // 단건
+    public function show(int $id)
+    {
+        $tenantId = $this->tenantId();
+        $p = Product::query()->where('tenant_id', $tenantId)->find($id);
+        if (!$p) throw new BadRequestHttpException(__('error.not_found'));
+        return $p;
+    }
+
+    // 수정
+    public function update(int $id, array $data)
+    {
+        $tenantId = $this->tenantId();
+        $userId   = $this->apiUserId();
+
+        $p = Product::query()->where('tenant_id', $tenantId)->find($id);
+        if (!$p) throw new BadRequestHttpException(__('error.not_found'));
+
+        $v = Validator::make($data, [
+            'code'           => 'sometimes|string|max:30',
+            'name'           => 'sometimes|string|max:100',
+            'category_id'    => 'sometimes|integer',
+            'product_type'   => 'sometimes|string|max:30',
+            'attributes'     => 'nullable|array',
+            'description'    => 'nullable|string|max:255',
+            'is_sellable'    => 'nullable|in:0,1',
+            'is_purchasable' => 'nullable|in:0,1',
+            'is_producible'  => 'nullable|in:0,1',
+            'is_active'      => 'nullable|in:0,1',
+        ]);
+        $payload = $v->validate();
+
+        if (isset($payload['code']) && $payload['code'] !== $p->code) {
+            $dup = Product::query()
+                ->where('tenant_id', $tenantId)
+                ->where('code', $payload['code'])
+                ->exists();
+            if ($dup) throw new BadRequestHttpException(__('error.duplicate_key'));
+        }
+
+        $payload['updated_by'] = $userId;
+        $p->update($payload);
+        return $p->refresh();
+    }
+
+    // 삭제(soft)
+    public function destroy(int $id): void
+    {
+        $tenantId = $this->tenantId();
+        $p = Product::query()->where('tenant_id', $tenantId)->find($id);
+        if (!$p) throw new BadRequestHttpException(__('error.not_found'));
+        $p->delete();
+    }
+
+    // 간편 검색(모달/드롭다운)
+    public function search(array $params)
+    {
+        $tenantId = $this->tenantId();
+        $q   = trim((string)($params['q'] ?? ''));
+        $lim = (int)($params['limit'] ?? 20);
+
+        $qr = Product::query()->where('tenant_id', $tenantId);
+        if ($q !== '') {
+            $qr->where(function ($w) use ($q) {
+                $w->where('name', 'like', "%{$q}%")
+                    ->orWhere('code', 'like', "%{$q}%");
+            });
+        }
+        return $qr->orderBy('name')->limit($lim)->get(['id','code','name','product_type','category_id','is_active']);
+    }
+
+    // 활성 토글
+    public function toggle(int $id)
+    {
+        $tenantId = $this->tenantId();
+        $userId   = $this->apiUserId();
+
+        $p = Product::query()->where('tenant_id', $tenantId)->find($id);
+        if (!$p) throw new BadRequestHttpException(__('error.not_found'));
+
+        $p->is_active = $p->is_active ? 0 : 1;
+        $p->updated_by = $userId;
+        $p->save();
+
+        return ['id' => $p->id, 'is_active' => (int)$p->is_active];
+    }
+
 
 }
diff --git a/app/Swagger/v1/CategoryExtras.php b/app/Swagger/v1/CategoryExtras.php
new file mode 100644
index 0000000..5c0488c
--- /dev/null
+++ b/app/Swagger/v1/CategoryExtras.php
@@ -0,0 +1,564 @@
+<?php
+
+namespace App\Swagger\v1;
+
+/**
+ * @OA\Tag(name="Category-Fields", description="카테고리별 동적 필드 관리")
+ * @OA\Tag(name="Category-Templates", description="카테고리 템플릿 버전 관리")
+ * @OA\Tag(name="Category-Logs", description="카테고리 변경 이력 조회")
+ */
+
+/**
+ * =========================
+ * =====  Schemas  ========
+ * =========================
+ */
+
+/**
+ * @OA\Schema(
+ *   schema="CategoryField",
+ *   type="object",
+ *   required={"id","tenant_id","category_id","field_key","field_name","field_type"},
+ *   @OA\Property(property="id", type="integer", example=11),
+ *   @OA\Property(property="tenant_id", type="integer", example=1),
+ *   @OA\Property(property="category_id", type="integer", example=7),
+ *   @OA\Property(property="field_key", type="string", example="width"),
+ *   @OA\Property(property="field_name", type="string", example="폭(mm)"),
+ *   @OA\Property(property="field_type", type="string", example="number"),
+ *   @OA\Property(property="is_required", type="string", enum={"Y","N"}, example="N"),
+ *   @OA\Property(property="sort_order", type="integer", example=1),
+ *   @OA\Property(property="default_value", type="string", nullable=true, example=null),
+ *   @OA\Property(
+ *     property="options",
+ *     type="object",
+ *     nullable=true,
+ *     description="선택지(콤보박스 등)",
+ *     example={"units": {"mm","cm","m"}}
+ *   ),
+ *   @OA\Property(property="description", type="string", nullable=true, example=null),
+ *   @OA\Property(property="created_at", type="string", format="date-time", example="2025-08-25 10:00:00"),
+ *   @OA\Property(property="updated_at", type="string", format="date-time", example="2025-08-25 10:20:00")
+ * )
+ *
+ * @OA\Schema(
+ *   schema="CategoryFieldPagination",
+ *   type="object",
+ *   @OA\Property(property="current_page", type="integer", example=1),
+ *   @OA\Property(
+ *     property="data",
+ *     type="array",
+ *     @OA\Items(ref="#/components/schemas/CategoryField")
+ *   ),
+ *   @OA\Property(property="per_page", type="integer", example=20),
+ *   @OA\Property(property="total", type="integer", example=3)
+ * )
+ *
+ * @OA\Schema(
+ *   schema="CategoryFieldCreateRequest",
+ *   type="object",
+ *   required={"field_key","field_name","field_type"},
+ *   @OA\Property(property="field_key", type="string", example="height"),
+ *   @OA\Property(property="field_name", type="string", example="높이(mm)"),
+ *   @OA\Property(property="field_type", type="string", example="number"),
+ *   @OA\Property(property="is_required", type="string", enum={"Y","N"}, example="N"),
+ *   @OA\Property(property="sort_order", type="integer", example=2),
+ *   @OA\Property(property="default_value", type="string", nullable=true, example=null),
+ *   @OA\Property(
+ *     property="options",
+ *     type="object",
+ *     nullable=true,
+ *     example={"min": 0, "max": 9999, "step": 1}
+ *   ),
+ *   @OA\Property(property="description", type="string", nullable=true, example="선택 입력")
+ * )
+ *
+ * @OA\Schema(
+ *   schema="CategoryFieldUpdateRequest",
+ *   type="object",
+ *   @OA\Property(property="field_key", type="string", example="height"),
+ *   @OA\Property(property="field_name", type="string", example="높이(mm)"),
+ *   @OA\Property(property="field_type", type="string", example="number"),
+ *   @OA\Property(property="is_required", type="string", enum={"Y","N"}, example="Y"),
+ *   @OA\Property(property="sort_order", type="integer", example=1),
+ *   @OA\Property(property="default_value", type="string", nullable=true, example=null),
+ *   @OA\Property(
+ *     property="options",
+ *     type="object",
+ *     nullable=true,
+ *     example={"min": 0, "max": 9999, "step": 1}
+ *   ),
+ *   @OA\Property(property="description", type="string", nullable=true, example=null)
+ * )
+ *
+ * @OA\Schema(
+ *   schema="CategoryFieldReorderRequest",
+ *   type="array",
+ *   @OA\Items(
+ *     type="object",
+ *     required={"id","sort_order"},
+ *     @OA\Property(property="id", type="integer", example=11),
+ *     @OA\Property(property="sort_order", type="integer", example=1)
+ *   )
+ * )
+ *
+ * @OA\Schema(
+ *   schema="CategoryFieldBulkUpsertRequest",
+ *   type="object",
+ *   required={"items"},
+ *   @OA\Property(
+ *     property="items",
+ *     type="array",
+ *     @OA\Items(
+ *       type="object",
+ *       @OA\Property(property="id", type="integer", nullable=true, example=null),
+ *       @OA\Property(property="field_key", type="string", example="thickness"),
+ *       @OA\Property(property="field_name", type="string", example="두께(mm)"),
+ *       @OA\Property(property="field_type", type="string", example="number"),
+ *       @OA\Property(property="is_required", type="string", enum={"Y","N"}, example="N"),
+ *       @OA\Property(property="sort_order", type="integer", example=3),
+ *       @OA\Property(property="default_value", type="string", nullable=true, example=null),
+ *       @OA\Property(property="options", type="object", nullable=true, example={"unit":"mm"}),
+ *       @OA\Property(property="description", type="string", nullable=true, example=null)
+ *     )
+ *   )
+ * )
+ *
+ * @OA\Schema(
+ *   schema="CategoryTemplate",
+ *   type="object",
+ *   required={"id","tenant_id","category_id","version_no","template_json","applied_at"},
+ *   @OA\Property(property="id", type="integer", example=1001),
+ *   @OA\Property(property="tenant_id", type="integer", example=1),
+ *   @OA\Property(property="category_id", type="integer", example=7),
+ *   @OA\Property(property="version_no", type="integer", example=3),
+ *   @OA\Property(
+ *     property="template_json",
+ *     type="object",
+ *     description="템플릿 스냅샷",
+ *     example={"fields": {{"key":"width","type":"number","required":true}}}
+ *   ),
+ *   @OA\Property(property="applied_at", type="string", format="date-time", example="2025-08-25 11:00:00"),
+ *   @OA\Property(property="remarks", type="string", nullable=true, example="높이 필드 추가"),
+ *   @OA\Property(property="created_at", type="string", format="date-time", example="2025-08-25 10:50:00"),
+ *   @OA\Property(property="updated_at", type="string", format="date-time", example="2025-08-25 11:05:00")
+ * )
+ *
+ * @OA\Schema(
+ *   schema="CategoryTemplateCreateRequest",
+ *   type="object",
+ *   required={"version_no","template_json","applied_at"},
+ *   @OA\Property(property="version_no", type="integer", example=4),
+ *   @OA\Property(
+ *     property="template_json",
+ *     type="object",
+ *     example={
+ *       "fields": {
+ *         {"key":"width","type":"number","required":true},
+ *         {"key":"height","type":"number","required":false}
+ *       }
+ *     }
+ *   ),
+ *   @OA\Property(property="applied_at", type="string", format="date-time", example="2025-08-25 13:00:00"),
+ *   @OA\Property(property="remarks", type="string", nullable=true, example="높이 추가 버전")
+ * )
+ *
+ * @OA\Schema(
+ *   schema="CategoryTemplateUpdateRequest",
+ *   type="object",
+ *   @OA\Property(
+ *     property="template_json",
+ *     type="object",
+ *     example={"fields": {{"key":"width","type":"number"}}}
+ *   ),
+ *   @OA\Property(property="applied_at", type="string", format="date-time", example="2025-08-26 09:00:00"),
+ *   @OA\Property(property="remarks", type="string", nullable=true, example="비고 수정")
+ * )
+ *
+ * @OA\Schema(
+ *   schema="CategoryLog",
+ *   type="object",
+ *   required={"id","tenant_id","category_id","action","changed_at"},
+ *   @OA\Property(property="id", type="integer", example=501),
+ *   @OA\Property(property="tenant_id", type="integer", example=1),
+ *   @OA\Property(property="category_id", type="integer", example=7),
+ *   @OA\Property(property="action", type="string", example="update"),
+ *   @OA\Property(property="changed_by", type="integer", nullable=true, example=1),
+ *   @OA\Property(property="changed_at", type="string", format="date-time", example="2025-08-25 14:00:00"),
+ *   @OA\Property(property="before_json", type="object", nullable=true, example={"name":"old"}),
+ *   @OA\Property(property="after_json",  type="object", nullable=true, example={"name":"new"}),
+ *   @OA\Property(property="remarks", type="string", nullable=true, example=null)
+ * )
+ */
+class CategoryExtras
+{
+    /**
+     * ===============================
+     * ==== Category Field APIs ======
+     * ===============================
+     */
+
+    /**
+     * @OA\Get(
+     *   path="/api/v1/categories/{id}/fields",
+     *   tags={"Category-Fields"},
+     *   summary="카테고리별 필드 목록",
+     *   security={{"ApiKeyAuth": {}},{"BearerAuth": {}}},
+     *   @OA\Parameter(name="id", in="path", required=true, @OA\Schema(type="integer"), description="카테고리 ID"),
+     *   @OA\Parameter(ref="#/components/parameters/Page"),
+     *   @OA\Parameter(ref="#/components/parameters/Size"),
+     *   @OA\Parameter(name="sort", in="query", @OA\Schema(type="string", example="sort_order")),
+     *   @OA\Parameter(name="order", in="query", @OA\Schema(type="string", enum={"asc","desc"}, example="asc")),
+     *   @OA\Response(
+     *     response=200,
+     *     description="목록 조회 성공",
+     *     @OA\JsonContent(allOf={
+     *       @OA\Schema(ref="#/components/schemas/ApiResponse"),
+     *       @OA\Schema(@OA\Property(property="data", ref="#/components/schemas/CategoryFieldPagination"))
+     *     })
+     *   ),
+     *   @OA\Response(response=401, description="인증 실패", @OA\JsonContent(ref="#/components/schemas/ErrorResponse"))
+     * )
+     */
+    public function fieldsIndex() {}
+
+    /**
+     * @OA\Post(
+     *   path="/api/v1/categories/{id}/fields",
+     *   tags={"Category-Fields"},
+     *   summary="카테고리 필드 생성",
+     *   security={{"ApiKeyAuth": {}},{"BearerAuth": {}}},
+     *   @OA\Parameter(name="id", in="path", required=true, @OA\Schema(type="integer")),
+     *   @OA\RequestBody(required=true, @OA\JsonContent(ref="#/components/schemas/CategoryFieldCreateRequest")),
+     *   @OA\Response(
+     *     response=200,
+     *     description="생성 성공",
+     *     @OA\JsonContent(allOf={
+     *       @OA\Schema(ref="#/components/schemas/ApiResponse"),
+     *       @OA\Schema(@OA\Property(property="data", ref="#/components/schemas/CategoryField"))
+     *     })
+     *   ),
+     *   @OA\Response(response=400, description="검증 실패", @OA\JsonContent(ref="#/components/schemas/ErrorResponse"))
+     * )
+     */
+    public function fieldsStore() {}
+
+    /**
+     * @OA\Get(
+     *   path="/api/v1/categories/fields/{field}",
+     *   tags={"Category-Fields"},
+     *   summary="카테고리 필드 단건 조회",
+     *   security={{"ApiKeyAuth": {}},{"BearerAuth": {}}},
+     *   @OA\Parameter(name="field", in="path", required=true, @OA\Schema(type="integer")),
+     *   @OA\Response(
+     *     response=200,
+     *     description="조회 성공",
+     *     @OA\JsonContent(allOf={
+     *       @OA\Schema(ref="#/components/schemas/ApiResponse"),
+     *       @OA\Schema(@OA\Property(property="data", ref="#/components/schemas/CategoryField"))
+     *     })
+     *   ),
+     *   @OA\Response(response=404, description="없음", @OA\JsonContent(ref="#/components/schemas/ErrorResponse"))
+     * )
+     */
+    public function fieldsShow() {}
+
+    /**
+     * @OA\Patch(
+     *   path="/api/v1/categories/fields/{field}",
+     *   tags={"Category-Fields"},
+     *   summary="카테고리 필드 수정",
+     *   security={{"ApiKeyAuth": {}},{"BearerAuth": {}}},
+     *   @OA\Parameter(name="field", in="path", required=true, @OA\Schema(type="integer")),
+     *   @OA\RequestBody(required=true, @OA\JsonContent(ref="#/components/schemas/CategoryFieldUpdateRequest")),
+     *   @OA\Response(
+     *     response=200,
+     *     description="수정 성공",
+     *     @OA\JsonContent(allOf={
+     *       @OA\Schema(ref="#/components/schemas/ApiResponse"),
+     *       @OA\Schema(@OA\Property(property="data", ref="#/components/schemas/CategoryField"))
+     *     })
+     *   )
+     * )
+     */
+    public function fieldsUpdate() {}
+
+    /**
+     * @OA\Delete(
+     *   path="/api/v1/categories/fields/{field}",
+     *   tags={"Category-Fields"},
+     *   summary="카테고리 필드 삭제",
+     *   security={{"ApiKeyAuth": {}},{"BearerAuth": {}}},
+     *   @OA\Parameter(name="field", in="path", required=true, @OA\Schema(type="integer")),
+     *   @OA\Response(
+     *     response=200,
+     *     description="삭제 성공",
+     *     @OA\JsonContent(ref="#/components/schemas/ApiResponse")
+     *   )
+     * )
+     */
+    public function fieldsDestroy() {}
+
+    /**
+     * @OA\Post(
+     *   path="/api/v1/categories/{id}/fields/reorder",
+     *   tags={"Category-Fields"},
+     *   summary="카테고리 필드 정렬 저장",
+     *   security={{"ApiKeyAuth": {}},{"BearerAuth": {}}},
+     *   @OA\Parameter(name="id", in="path", required=true, @OA\Schema(type="integer")),
+     *   @OA\RequestBody(required=true, @OA\JsonContent(ref="#/components/schemas/CategoryFieldReorderRequest")),
+     *   @OA\Response(response=200, description="저장 성공", @OA\JsonContent(ref="#/components/schemas/ApiResponse"))
+     * )
+     */
+    public function fieldsReorder() {}
+
+    /**
+     * @OA\Put(
+     *   path="/api/v1/categories/{id}/fields/bulk-upsert",
+     *   tags={"Category-Fields"},
+     *   summary="카테고리 필드 일괄 업서트",
+     *   security={{"ApiKeyAuth": {}},{"BearerAuth": {}}},
+     *   @OA\Parameter(name="id", in="path", required=true, @OA\Schema(type="integer")),
+     *   @OA\RequestBody(required=true, @OA\JsonContent(ref="#/components/schemas/CategoryFieldBulkUpsertRequest")),
+     *   @OA\Response(
+     *     response=200,
+     *     description="업서트 성공",
+     *     @OA\JsonContent(allOf={
+     *       @OA\Schema(ref="#/components/schemas/ApiResponse"),
+     *       @OA\Schema(
+     *         @OA\Property(property="data", type="object",
+     *           @OA\Property(property="created", type="integer", example=2),
+     *           @OA\Property(property="updated", type="integer", example=3)
+     *         )
+     *       )
+     *     })
+     *   )
+     * )
+     */
+    public function fieldsBulkUpsert() {}
+
+    /**
+     * ==================================
+     * ==== Category Template APIs  =====
+     * ==================================
+     */
+
+    /**
+     * @OA\Get(
+     *   path="/api/v1/categories/{id}/templates",
+     *   tags={"Category-Templates"},
+     *   summary="카테고리 템플릿 버전 목록",
+     *   security={{"ApiKeyAuth": {}},{"BearerAuth": {}}},
+     *   @OA\Parameter(name="id", in="path", required=true, @OA\Schema(type="integer")),
+     *   @OA\Parameter(ref="#/components/parameters/Page"),
+     *   @OA\Parameter(ref="#/components/parameters/Size"),
+     *   @OA\Response(
+     *     response=200,
+     *     description="목록 조회 성공",
+     *     @OA\JsonContent(allOf={
+     *       @OA\Schema(ref="#/components/schemas/ApiResponse"),
+     *       @OA\Schema(
+     *         @OA\Property(
+     *           property="data",
+     *           type="object",
+     *           @OA\Property(
+     *             property="data",
+     *             type="array",
+     *             @OA\Items(ref="#/components/schemas/CategoryTemplate")
+     *           ),
+     *           @OA\Property(property="total", type="integer", example=3)
+     *         )
+     *       )
+     *     })
+     *   )
+     * )
+     */
+    public function templatesIndex() {}
+
+    /**
+     * @OA\Post(
+     *   path="/api/v1/categories/{id}/templates",
+     *   tags={"Category-Templates"},
+     *   summary="카테고리 템플릿 생성(새 버전)",
+     *   security={{"ApiKeyAuth": {}},{"BearerAuth": {}}},
+     *   @OA\Parameter(name="id", in="path", required=true, @OA\Schema(type="integer")),
+     *   @OA\RequestBody(required=true, @OA\JsonContent(ref="#/components/schemas/CategoryTemplateCreateRequest")),
+     *   @OA\Response(
+     *     response=200,
+     *     description="생성 성공",
+     *     @OA\JsonContent(allOf={
+     *       @OA\Schema(ref="#/components/schemas/ApiResponse"),
+     *       @OA\Schema(@OA\Property(property="data", ref="#/components/schemas/CategoryTemplate"))
+     *     })
+     *   ),
+     *   @OA\Response(response=409, description="버전 중복", @OA\JsonContent(ref="#/components/schemas/ErrorResponse"))
+     * )
+     */
+    public function templatesStore() {}
+
+    /**
+     * @OA\Get(
+     *   path="/api/v1/categories/templates/{tpl}",
+     *   tags={"Category-Templates"},
+     *   summary="카테고리 템플릿 단건 조회",
+     *   security={{"ApiKeyAuth": {}},{"BearerAuth": {}}},
+     *   @OA\Parameter(name="tpl", in="path", required=true, @OA\Schema(type="integer")),
+     *   @OA\Response(
+     *     response=200,
+     *     description="조회 성공",
+     *     @OA\JsonContent(allOf={
+     *       @OA\Schema(ref="#/components/schemas/ApiResponse"),
+     *       @OA\Schema(@OA\Property(property="data", ref="#/components/schemas/CategoryTemplate"))
+     *     })
+     *   )
+     * )
+     */
+    public function templatesShow() {}
+
+    /**
+     * @OA\Patch(
+     *   path="/api/v1/categories/templates/{tpl}",
+     *   tags={"Category-Templates"},
+     *   summary="카테고리 템플릿 수정",
+     *   security={{"ApiKeyAuth": {}},{"BearerAuth": {}}},
+     *   @OA\Parameter(name="tpl", in="path", required=true, @OA\Schema(type="integer")),
+     *   @OA\RequestBody(required=true, @OA\JsonContent(ref="#/components/schemas/CategoryTemplateUpdateRequest")),
+     *   @OA\Response(
+     *     response=200,
+     *     description="수정 성공",
+     *     @OA\JsonContent(allOf={
+     *       @OA\Schema(ref="#/components/schemas/ApiResponse"),
+     *       @OA\Schema(@OA\Property(property="data", ref="#/components/schemas/CategoryTemplate"))
+     *     })
+     *   )
+     * )
+     */
+    public function templatesUpdate() {}
+
+    /**
+     * @OA\Delete(
+     *   path="/api/v1/categories/templates/{tpl}",
+     *   tags={"Category-Templates"},
+     *   summary="카테고리 템플릿 삭제",
+     *   security={{"ApiKeyAuth": {}},{"BearerAuth": {}}},
+     *   @OA\Parameter(name="tpl", in="path", required=true, @OA\Schema(type="integer")),
+     *   @OA\Response(response=200, description="삭제 성공", @OA\JsonContent(ref="#/components/schemas/ApiResponse"))
+     * )
+     */
+    public function templatesDestroy() {}
+
+    /**
+     * @OA\Post(
+     *   path="/api/v1/categories/{id}/templates/{tpl}/apply",
+     *   tags={"Category-Templates"},
+     *   summary="카테고리 템플릿 적용(활성화)",
+     *   security={{"ApiKeyAuth": {}},{"BearerAuth": {}}},
+     *   @OA\Parameter(name="id",  in="path", required=true, @OA\Schema(type="integer")),
+     *   @OA\Parameter(name="tpl", in="path", required=true, @OA\Schema(type="integer")),
+     *   @OA\Response(response=200, description="적용 성공", @OA\JsonContent(ref="#/components/schemas/ApiResponse"))
+     * )
+     */
+    public function templatesApply() {}
+
+    /**
+     * @OA\Get(
+     *   path="/api/v1/categories/{id}/templates/{tpl}/preview",
+     *   tags={"Category-Templates"},
+     *   summary="카테고리 템플릿 미리보기",
+     *   security={{"ApiKeyAuth": {}},{"BearerAuth": {}}},
+     *   @OA\Parameter(name="id",  in="path", required=true, @OA\Schema(type="integer")),
+     *   @OA\Parameter(name="tpl", in="path", required=true, @OA\Schema(type="integer")),
+     *   @OA\Response(
+     *     response=200,
+     *     description="미리보기 성공",
+     *     @OA\JsonContent(allOf={@OA\Schema(ref="#/components/schemas/ApiResponse")})
+     *   )
+     * )
+     */
+    public function templatesPreview() {}
+
+    /**
+     * @OA\Get(
+     *   path="/api/v1/categories/{id}/templates/diff",
+     *   tags={"Category-Templates"},
+     *   summary="두 버전 비교(diff)",
+     *   security={{"ApiKeyAuth": {}},{"BearerAuth": {}}},
+     *   @OA\Parameter(name="id", in="path", required=true, @OA\Schema(type="integer")),
+     *   @OA\Parameter(name="a", in="query", required=true, @OA\Schema(type="integer"), description="비교 기준 버전"),
+     *   @OA\Parameter(name="b", in="query", required=true, @OA\Schema(type="integer"), description="비교 대상 버전"),
+     *   @OA\Response(
+     *     response=200,
+     *     description="비교 성공",
+     *     @OA\JsonContent(allOf={
+     *       @OA\Schema(ref="#/components/schemas/ApiResponse"),
+     *       @OA\Schema(
+     *         @OA\Property(property="data", type="object",
+     *           @OA\Property(property="added", type="array", @OA\Items(type="string")),
+     *           @OA\Property(property="removed", type="array", @OA\Items(type="string"))
+     *         )
+     *       )
+     *     })
+     *   )
+     * )
+     */
+    public function templatesDiff() {}
+
+    /**
+     * ==============================
+     * ===== Category Log APIs =====
+     * ==============================
+     */
+
+    /**
+     * @OA\Get(
+     *   path="/api/v1/categories/{id}/logs",
+     *   tags={"Category-Logs"},
+     *   summary="카테고리 변경 이력 목록",
+     *   security={{"ApiKeyAuth": {}},{"BearerAuth": {}}},
+     *   @OA\Parameter(name="id", in="path", required=true, @OA\Schema(type="integer")),
+     *   @OA\Parameter(name="action", in="query", @OA\Schema(type="string", enum={"insert","update","delete"})),
+     *   @OA\Parameter(name="from", in="query", @OA\Schema(type="string", format="date")),
+     *   @OA\Parameter(name="to", in="query", @OA\Schema(type="string", format="date")),
+     *   @OA\Parameter(ref="#/components/parameters/Page"),
+     *   @OA\Parameter(ref="#/components/parameters/Size"),
+     *   @OA\Response(
+     *     response=200,
+     *     description="목록 조회 성공",
+     *     @OA\JsonContent(allOf={
+     *       @OA\Schema(ref="#/components/schemas/ApiResponse"),
+     *       @OA\Schema(
+     *         @OA\Property(
+     *           property="data",
+     *           type="object",
+     *           @OA\Property(
+     *             property="data",
+     *             type="array",
+     *             @OA\Items(ref="#/components/schemas/CategoryLog")
+     *           ),
+     *           @OA\Property(property="total", type="integer", example=12)
+     *         )
+     *       )
+     *     })
+     *   )
+     * )
+     */
+    public function logsIndex() {}
+
+    /**
+     * @OA\Get(
+     *   path="/api/v1/categories/logs/{log}",
+     *   tags={"Category-Logs"},
+     *   summary="카테고리 변경 이력 단건 조회",
+     *   security={{"ApiKeyAuth": {}},{"BearerAuth": {}}},
+     *   @OA\Parameter(name="log", in="path", required=true, @OA\Schema(type="integer")),
+     *   @OA\Response(
+     *     response=200,
+     *     description="조회 성공",
+     *     @OA\JsonContent(allOf={
+     *       @OA\Schema(ref="#/components/schemas/ApiResponse"),
+     *       @OA\Schema(@OA\Property(property="data", ref="#/components/schemas/CategoryLog"))
+     *     })
+     *   )
+     * )
+     */
+    public function logsShow() {}
+}
diff --git a/app/Swagger/v1/ProductApi.php b/app/Swagger/v1/ProductApi.php
index c7ac6a1..33f2ab2 100644
--- a/app/Swagger/v1/ProductApi.php
+++ b/app/Swagger/v1/ProductApi.php
@@ -3,37 +3,19 @@
 namespace App\Swagger\v1;
 
 /**
- * 제품 카테고리 스키마
- * @OA\Schema(
- *     schema="ProductCategory",
- *     type="object",
- *     description="제품 카테고리",
- *     required={"id","code_group","code","name","is_active","sort_order"},
- *     @OA\Property(property="id", type="integer", example=4),
- *     @OA\Property(property="code_group", type="string", example="category"),
- *     @OA\Property(property="code", type="string", example="BP"),
- *     @OA\Property(property="name", type="string", example="절곡판"),
- *     @OA\Property(property="parent_id", type="integer", nullable=true, example=null),
- *     @OA\Property(
- *         property="attributes",
- *         type="object",
- *         nullable=true,
- *         description="카테고리 속성(자유형식 JSON)",
- *         example={"color":"blue","flags":{"screen":true}}
- *     ),
- *     @OA\Property(property="description", type="string", nullable=true, example="절곡판"),
- *     @OA\Property(property="is_active", type="integer", example=1),
- *     @OA\Property(property="sort_order", type="integer", example=10),
- *     @OA\Property(property="created_at", type="string", format="date-time", example="2025-07-23T09:00:00+09:00"),
- *     @OA\Property(property="updated_at", type="string", format="date-time", example="2025-07-23T09:00:00+09:00")
- * )
- *
- * 카테고리 목록 조회
+ * @OA\Tag(name="Product", description="제품 카테고리/검색(간단)")
+ * @OA\Tag(name="Products", description="제품/부품/서브어셈블리 CRUD")
+ * @OA\Tag(name="Products-BOM", description="제품 BOM (제품/자재 혼합) 관리")
+ */
+
+
+/**
+ * 카테고리 목록 조회 (기존)
  * @OA\Get(
  *     path="/api/v1/product/category",
  *     summary="제품 카테고리 목록 조회",
  *     description="제품 카테고리(최상위: parent_id = null) 리스트를 반환합니다.",
- *     tags={"Product"},
+ *     tags={"Products"},
  *     security={{"ApiKeyAuth": {}},{"BearerAuth": {}}},
  *     @OA\Response(
  *         response=200,
@@ -51,12 +33,326 @@
  *             }
  *         )
  *     ),
- *     @OA\Response(response=400, description="필수 파라미터 누락", @OA\JsonContent(ref="#/components/schemas/ErrorResponse")),
  *     @OA\Response(response=401, description="인증 실패", @OA\JsonContent(ref="#/components/schemas/ErrorResponse")),
- *     @OA\Response(response=403, description="권한 없음", @OA\JsonContent(ref="#/components/schemas/ErrorResponse")),
- *     @OA\Response(response=404, description="존재하지 않는 URI 또는 데이터", @OA\JsonContent(ref="#/components/schemas/ErrorResponse")),
- *     @OA\Response(response=405, description="허용되지 않는 메서드", @OA\JsonContent(ref="#/components/schemas/ErrorResponse")),
- *     @OA\Response(response=500, description="서버 에러", @OA\JsonContent(ref="#/components/schemas/ErrorResponse"))
+ *     @OA\Response(response=403, description="권한 없음", @OA\JsonContent(ref="#/components/schemas/ErrorResponse"))
  * )
  */
-class ProductApi {}
+class ProductApi
+{
+    /**
+     * 제품 목록/검색
+     * @OA\Get(
+     *   path="/api/v1/products",
+     *   tags={"Products"},
+     *   summary="제품 목록/검색",
+     *   security={{"ApiKeyAuth": {}},{"BearerAuth": {}}},
+     *   @OA\Parameter(ref="#/components/parameters/Page"),
+     *   @OA\Parameter(ref="#/components/parameters/Size"),
+     *   @OA\Parameter(name="q", in="query", @OA\Schema(type="string"), description="코드/이름/설명 검색"),
+     *   @OA\Parameter(name="category_id", in="query", @OA\Schema(type="integer")),
+     *   @OA\Parameter(name="product_type", in="query", @OA\Schema(type="string", example="PRODUCT")),
+     *   @OA\Parameter(name="active", in="query", @OA\Schema(type="integer", enum={0,1})),
+     *   @OA\Response(
+     *     response=200,
+     *     description="조회 성공",
+     *     @OA\JsonContent(allOf={
+     *       @OA\Schema(ref="#/components/schemas/ApiResponse"),
+     *       @OA\Schema(@OA\Property(property="data", ref="#/components/schemas/ProductPagination"))
+     *     })
+     *   )
+     * )
+     */
+    public function productsIndex() {}
+
+
+    /**
+     * 제품 생성
+     * @OA\Post(
+     *   path="/api/v1/products",
+     *   tags={"Products"},
+     *   summary="제품 생성",
+     *   security={{"ApiKeyAuth": {}},{"BearerAuth": {}}},
+     *   @OA\RequestBody(required=true, @OA\JsonContent(ref="#/components/schemas/ProductCreateRequest")),
+     *   @OA\Response(
+     *     response=200,
+     *     description="생성 성공",
+     *     @OA\JsonContent(allOf={
+     *       @OA\Schema(ref="#/components/schemas/ApiResponse"),
+     *       @OA\Schema(@OA\Property(property="data", ref="#/components/schemas/Product"))
+     *     })
+     *   )
+     * )
+     */
+    public function productsStore() {}
+
+
+    /**
+     * 제품 단건
+     * @OA\Get(
+     *   path="/api/v1/products/{id}",
+     *   tags={"Products"},
+     *   summary="제품 단건 조회",
+     *   security={{"ApiKeyAuth": {}},{"BearerAuth": {}}},
+     *   @OA\Parameter(name="id", in="path", required=true, @OA\Schema(type="integer")),
+     *   @OA\Response(
+     *     response=200,
+     *     description="조회 성공",
+     *     @OA\JsonContent(allOf={
+     *       @OA\Schema(ref="#/components/schemas/ApiResponse"),
+     *       @OA\Schema(@OA\Property(property="data", ref="#/components/schemas/Product"))
+     *     })
+     *   ),
+     *   @OA\Response(response=404, description="없음", @OA\JsonContent(ref="#/components/schemas/ErrorResponse"))
+     * )
+     */
+    public function productsShow() {}
+
+    /**
+     * 제품 수정
+     * @OA\Patch(
+     *   path="/api/v1/products/{id}",
+     *   tags={"Products"},
+     *   summary="제품 수정",
+     *   security={{"ApiKeyAuth": {}},{"BearerAuth": {}}},
+     *   @OA\Parameter(name="id", in="path", required=true, @OA\Schema(type="integer")),
+     *   @OA\RequestBody(required=true, @OA\JsonContent(ref="#/components/schemas/ProductUpdateRequest")),
+     *   @OA\Response(
+     *     response=200,
+     *     description="수정 성공",
+     *     @OA\JsonContent(allOf={
+     *       @OA\Schema(ref="#/components/schemas/ApiResponse"),
+     *       @OA\Schema(@OA\Property(property="data", ref="#/components/schemas/Product"))
+     *     })
+     *   )
+     * )
+     */
+    public function productsUpdate() {}
+
+    /**
+     * 제품 삭제(soft)
+     * @OA\Delete(
+     *   path="/api/v1/products/{id}",
+     *   tags={"Products"},
+     *   summary="제품 삭제(soft)",
+     *   security={{"ApiKeyAuth": {}},{"BearerAuth": {}}},
+     *   @OA\Parameter(name="id", in="path", required=true, @OA\Schema(type="integer")),
+     *   @OA\Response(response=200, description="삭제 성공", @OA\JsonContent(ref="#/components/schemas/ApiResponse"))
+     * )
+     */
+    public function productsDestroy() {}
+
+    /**
+     * 제품 간편 검색(모달/드롭다운)
+     * @OA\Get(
+     *   path="/api/v1/products/search",
+     *   tags={"Products"},
+     *   summary="제품 간편 검색",
+     *   security={{"ApiKeyAuth": {}},{"BearerAuth": {}}},
+     *   @OA\Parameter(name="q", in="query", @OA\Schema(type="string")),
+     *   @OA\Parameter(name="limit", in="query", @OA\Schema(type="integer"), description="기본 20"),
+     *   @OA\Response(
+     *     response=200,
+     *     description="검색 성공",
+     *     @OA\JsonContent(allOf={
+     *       @OA\Schema(ref="#/components/schemas/ApiResponse"),
+     *       @OA\Schema(
+     *         @OA\Property(
+     *           property="data",
+     *           type="array",
+     *           @OA\Items(type="object",
+     *             @OA\Property(property="id", type="integer", example=101),
+     *             @OA\Property(property="code", type="string", example="PRD-001"),
+     *             @OA\Property(property="name", type="string", example="스크린 모듈 KS001"),
+     *             @OA\Property(property="product_type", type="string", example="PRODUCT"),
+     *             @OA\Property(property="category_id", type="integer", example=7),
+     *             @OA\Property(property="is_active", type="integer", example=1)
+     *           )
+     *         )
+     *       )
+     *     })
+     *   )
+     * )
+     */
+    public function productsSearch() {}
+
+    /**
+     * 제품 활성/비활성 토글
+     * @OA\Post(
+     *   path="/api/v1/products/{id}/toggle",
+     *   tags={"Products"},
+     *   summary="제품 활성/비활성 토글",
+     *   security={{"ApiKeyAuth": {}},{"BearerAuth": {}}},
+     *   @OA\Parameter(name="id", in="path", required=true, @OA\Schema(type="integer")),
+     *   @OA\Response(
+     *     response=200,
+     *     description="토글 성공",
+     *     @OA\JsonContent(allOf={
+     *       @OA\Schema(ref="#/components/schemas/ApiResponse"),
+     *       @OA\Schema(
+     *         @OA\Property(property="data", type="object",
+     *             @OA\Property(property="id", type="integer", example=101),
+     *             @OA\Property(property="is_active", type="integer", example=0)
+     *           )
+     *         )
+     *       })
+     *     )
+     *   )
+     * )
+     */
+    public function productsToggle() {}
+
+    /**
+     * BOM 항목 목록
+     * @OA\Get(
+     *   path="/api/v1/products/{id}/bom/items",
+     *   tags={"Products-BOM"},
+     *   summary="BOM 항목 목록(제품+자재 병합)",
+     *   security={{"ApiKeyAuth": {}},{"BearerAuth": {}}},
+     *   @OA\Parameter(name="id", in="path", required=true, @OA\Schema(type="integer")),
+     *   @OA\Response(
+     *     response=200,
+     *     description="조회 성공",
+     *     @OA\JsonContent(allOf={
+     *       @OA\Schema(ref="#/components/schemas/ApiResponse"),
+     *       @OA\Schema(
+     *         @OA\Property(property="data", type="array", @OA\Items(ref="#/components/schemas/BomItem"))
+     *       )
+     *     })
+     *   )
+     * )
+     */
+    public function bomItemsIndex() {}
+
+    /**
+     * BOM 대량 업서트
+     * @OA\Post(
+     *   path="/api/v1/products/{id}/bom/items/bulk",
+     *   tags={"Products-BOM"},
+     *   summary="BOM 항목 대량 업서트",
+     *   security={{"ApiKeyAuth": {}},{"BearerAuth": {}}},
+     *   @OA\Parameter(name="id", in="path", required=true, @OA\Schema(type="integer")),
+     *   @OA\RequestBody(required=true, @OA\JsonContent(ref="#/components/schemas/BomItemBulkUpsertRequest")),
+     *   @OA\Response(
+     *     response=200,
+     *     description="업서트 성공",
+     *     @OA\JsonContent(allOf={
+     *       @OA\Schema(ref="#/components/schemas/ApiResponse"),
+     *       @OA\Schema(
+     *         @OA\Property(property="data", type="object",
+     *           @OA\Property(property="created", type="integer", example=2),
+     *           @OA\Property(property="updated", type="integer", example=3)
+     *         )
+     *       )
+     *     })
+     *   )
+     * )
+     */
+    public function bomItemsBulk() {}
+
+    /**
+     * BOM 단건 수정
+     * @OA\Patch(
+     *   path="/api/v1/products/{id}/bom/items/{item}",
+     *   tags={"Products-BOM"},
+     *   summary="BOM 항목 단건 수정",
+     *   security={{"ApiKeyAuth": {}},{"BearerAuth": {}}},
+     *   @OA\Parameter(name="id", in="path", required=true, @OA\Schema(type="integer")),
+     *   @OA\Parameter(name="item", in="path", required=true, @OA\Schema(type="integer")),
+     *   @OA\RequestBody(required=true, @OA\JsonContent(ref="#/components/schemas/BomItemUpdateRequest")),
+     *   @OA\Response(
+     *     response=200,
+     *     description="수정 성공",
+     *     @OA\JsonContent(allOf={
+     *       @OA\Schema(ref="#/components/schemas/ApiResponse"),
+     *       @OA\Schema(@OA\Property(property="data", ref="#/components/schemas/BomItem"))
+     *     })
+     *   )
+     * )
+     */
+    public function bomItemsUpdate() {}
+
+    /**
+     * BOM 단건 삭제
+     * @OA\Delete(
+     *   path="/api/v1/products/{id}/bom/items/{item}",
+     *   tags={"Products-BOM"},
+     *   summary="BOM 항목 단건 삭제",
+     *   security={{"ApiKeyAuth": {}},{"BearerAuth": {}}},
+     *   @OA\Parameter(name="id", in="path", required=true, @OA\Schema(type="integer")),
+     *   @OA\Parameter(name="item", in="path", required=true, @OA\Schema(type="integer")),
+     *   @OA\Response(response=200, description="삭제 성공", @OA\JsonContent(ref="#/components/schemas/ApiResponse"))
+     * )
+     */
+    public function bomItemsDestroy() {}
+
+    /**
+     * BOM 정렬 변경
+     * @OA\Post(
+     *   path="/api/v1/products/{id}/bom/items/reorder",
+     *   tags={"Products-BOM"},
+     *   summary="BOM 정렬 변경",
+     *   security={{"ApiKeyAuth": {}},{"BearerAuth": {}}},
+     *   @OA\Parameter(name="id", in="path", required=true, @OA\Schema(type="integer")),
+     *   @OA\RequestBody(required=true, @OA\JsonContent(ref="#/components/schemas/BomReorderRequest")),
+     *   @OA\Response(response=200, description="저장 성공", @OA\JsonContent(ref="#/components/schemas/ApiResponse"))
+     * )
+     */
+    public function bomItemsReorder() {}
+
+    /**
+     * BOM 요약(건수/합계 등)
+     * @OA\Get(
+     *   path="/api/v1/products/{id}/bom/summary",
+     *   tags={"Products-BOM"},
+     *   summary="BOM 요약",
+     *   security={{"ApiKeyAuth": {}},{"BearerAuth": {}}},
+     *   @OA\Parameter(name="id", in="path", required=true, @OA\Schema(type="integer")),
+     *   @OA\Response(
+     *     response=200,
+     *     description="요약 성공",
+     *     @OA\JsonContent(allOf={
+     *       @OA\Schema(ref="#/components/schemas/ApiResponse"),
+     *       @OA\Schema(
+     *         @OA\Property(property="data", type="object",
+     *           @OA\Property(property="count", type="integer", example=5),
+     *           @OA\Property(property="count_product", type="integer", example=2),
+     *           @OA\Property(property="count_material", type="integer", example=3),
+     *           @OA\Property(property="quantity_sum", type="string", example="7.0000")
+     *         )
+     *       )
+     *     })
+     *   )
+     * )
+     */
+    public function bomSummary() {}
+
+    /**
+     * BOM 유효성 검사
+     * @OA\Get(
+     *   path="/api/v1/products/{id}/bom/validate",
+     *   tags={"Products-BOM"},
+     *   summary="BOM 유효성 검사",
+     *   security={{"ApiKeyAuth": {}},{"BearerAuth": {}}},
+     *   @OA\Parameter(name="id", in="path", required=true, @OA\Schema(type="integer")),
+     *   @OA\Response(
+     *     response=200,
+     *     description="검증 결과",
+     *     @OA\JsonContent(allOf={
+     *       @OA\Schema(ref="#/components/schemas/ApiResponse"),
+     *       @OA\Schema(
+     *         @OA\Property(property="data", type="object",
+     *           @OA\Property(property="valid", type="boolean", example=false),
+     *           @OA\Property(property="errors", type="array",
+     *             @OA\Items(type="object",
+     *               @OA\Property(property="id", type="integer", example=11),
+     *               @OA\Property(property="error", type="string", example="DUPLICATE_ITEM")
+     *             )
+     *           )
+     *         )
+     *       )
+     *     })
+     *   )
+     * )
+     */
+    public function bomValidate() {}
+}
diff --git a/app/Swagger/v1/ProductExtraSchemas.php b/app/Swagger/v1/ProductExtraSchemas.php
new file mode 100644
index 0000000..db1d3b6
--- /dev/null
+++ b/app/Swagger/v1/ProductExtraSchemas.php
@@ -0,0 +1,161 @@
+<?php
+
+namespace App\Swagger\v1;
+
+/**
+ * 스키마 컨테이너(어노테이션 스캔 용)
+ */
+class ProductExtraSchemas
+{
+    /**
+     * 제품 카테고리 스키마
+     * @OA\Schema(
+     *   schema="ProductCategory",
+     *   type="object",
+     *   required={"id","code_group","code","name","is_active","sort_order"},
+     *   @OA\Property(property="id", type="integer", example=4),
+     *   @OA\Property(property="code_group", type="string", example="category"),
+     *   @OA\Property(property="code", type="string", example="BP"),
+     *   @OA\Property(property="name", type="string", example="절곡판"),
+     *   @OA\Property(property="parent_id", type="integer", nullable=true, example=null),
+     *   @OA\Property(
+     *     property="attributes", type="object", nullable=true,
+     *     example={"color":"blue","flags":{"screen":true}}
+     *   ),
+     *   @OA\Property(property="description", type="string", nullable=true, example="절곡판"),
+     *   @OA\Property(property="is_active", type="integer", example=1),
+     *   @OA\Property(property="sort_order", type="integer", example=10),
+     *   @OA\Property(property="created_at", type="string", format="date-time", example="2025-07-23T09:00:00+09:00"),
+     *   @OA\Property(property="updated_at", type="string", format="date-time", example="2025-07-23T09:00:00+09:00")
+     * )
+     */
+    public function _category() {}
+
+    /**
+     * 제품 관련 스키마들
+     * @OA\Schema(
+     *   schema="Product",
+     *   type="object",
+     *   required={"id","tenant_id","code","name","category_id","product_type","is_active"},
+     *   @OA\Property(property="id", type="integer", example=101),
+     *   @OA\Property(property="tenant_id", type="integer", example=1),
+     *   @OA\Property(property="code", type="string", example="PRD-001"),
+     *   @OA\Property(property="name", type="string", example="스크린 모듈 KS001"),
+     *   @OA\Property(property="category_id", type="integer", example=7),
+     *   @OA\Property(property="product_type", type="string", example="PRODUCT"),
+     *   @OA\Property(property="attributes", type="object", nullable=true, example={"color":"black","size":"L"}),
+     *   @OA\Property(property="description", type="string", nullable=true, example="고객사 스펙"),
+     *   @OA\Property(property="is_sellable", type="integer", example=1),
+     *   @OA\Property(property="is_purchasable", type="integer", example=0),
+     *   @OA\Property(property="is_producible", type="integer", example=1),
+     *   @OA\Property(property="is_active", type="integer", example=1),
+     *   @OA\Property(property="created_at", type="string", format="date-time", example="2025-08-25 10:00:00"),
+     *   @OA\Property(property="updated_at", type="string", format="date-time", example="2025-08-25 11:00:00")
+     * )
+     *
+     * @OA\Schema(
+     *   schema="ProductPagination",
+     *   type="object",
+     *   description="라라벨 LengthAwarePaginator 구조",
+     *   @OA\Property(property="current_page", type="integer", example=1),
+     *   @OA\Property(
+     *     property="data",
+     *     type="array",
+     *     @OA\Items(ref="#/components/schemas/Product")
+     *   ),
+     *   @OA\Property(property="per_page", type="integer", example=20),
+     *   @OA\Property(property="total", type="integer", example=123)
+     * )
+     *
+     * @OA\Schema(
+     *   schema="ProductCreateRequest",
+     *   type="object",
+     *   required={"code","name","category_id","product_type"},
+     *   @OA\Property(property="code", type="string", example="PRD-001"),
+     *   @OA\Property(property="name", type="string", example="스크린 모듈 KS001"),
+     *   @OA\Property(property="category_id", type="integer", example=7),
+     *   @OA\Property(property="product_type", type="string", example="PRODUCT"),
+     *   @OA\Property(property="attributes", type="object", nullable=true, example={"color":"black"}),
+     *   @OA\Property(property="description", type="string", nullable=true, example=null),
+     *   @OA\Property(property="is_sellable", type="integer", example=1),
+     *   @OA\Property(property="is_purchasable", type="integer", example=0),
+     *   @OA\Property(property="is_producible", type="integer", example=1),
+     *   @OA\Property(property="is_active", type="integer", example=1)
+     * )
+     *
+     * @OA\Schema(
+     *   schema="ProductUpdateRequest",
+     *   type="object",
+     *   @OA\Property(property="code", type="string", example="PRD-001"),
+     *   @OA\Property(property="name", type="string", example="스크린 모듈 KS001"),
+     *   @OA\Property(property="category_id", type="integer", example=7),
+     *   @OA\Property(property="product_type", type="string", example="PART"),
+     *   @OA\Property(property="attributes", type="object", nullable=true, example={"size":"XL"}),
+     *   @OA\Property(property="description", type="string", nullable=true, example="사양 변경"),
+     *   @OA\Property(property="is_sellable", type="integer", example=1),
+     *   @OA\Property(property="is_purchasable", type="integer", example=0),
+     *   @OA\Property(property="is_producible", type="integer", example=1),
+     *   @OA\Property(property="is_active", type="integer", example=1)
+     * )
+     */
+    public function _product() {}
+
+    /**
+     * BOM 스키마들
+     * @OA\Schema(
+     *   schema="BomItem",
+     *   type="object",
+     *   required={"id","ref_type","ref_id","quantity","sort_order"},
+     *   @OA\Property(property="id", type="integer", example=11),
+     *   @OA\Property(property="ref_type", type="string", enum={"PRODUCT","MATERIAL"}, example="PRODUCT"),
+     *   @OA\Property(property="ref_id", type="integer", example=3),
+     *   @OA\Property(property="code", type="string", nullable=true, example="PRD-003"),
+     *   @OA\Property(property="name", type="string", nullable=true, example="모듈A"),
+     *   @OA\Property(property="unit", type="string", nullable=true, example="EA"),
+     *   @OA\Property(property="quantity", type="number", format="float", example=2.0000),
+     *   @OA\Property(property="sort_order", type="integer", example=1),
+     *   @OA\Property(property="is_default", type="integer", example=1)
+     * )
+     *
+     * @OA\Schema(
+     *   schema="BomItemBulkUpsertRequest",
+     *   type="object",
+     *   required={"items"},
+     *   @OA\Property(
+     *     property="items",
+     *     type="array",
+     *     @OA\Items(
+     *       type="object",
+     *       @OA\Property(property="id", type="integer", nullable=true, example=null),
+     *       @OA\Property(property="ref_type", type="string", enum={"PRODUCT","MATERIAL"}, example="MATERIAL"),
+     *       @OA\Property(property="ref_id", type="integer", example=5),
+     *       @OA\Property(property="quantity", type="number", format="float", example=4.0000),
+     *       @OA\Property(property="sort_order", type="integer", example=2),
+     *       @OA\Property(property="is_default", type="integer", example=0)
+     *     )
+     *   )
+     * )
+     *
+     * @OA\Schema(
+     *   schema="BomItemUpdateRequest",
+     *   type="object",
+     *   @OA\Property(property="ref_type", type="string", enum={"PRODUCT","MATERIAL"}, example="PRODUCT"),
+     *   @OA\Property(property="ref_id", type="integer", example=9),
+     *   @OA\Property(property="quantity", type="number", format="float", example=1.5000),
+     *   @OA\Property(property="sort_order", type="integer", example=3),
+     *   @OA\Property(property="is_default", type="integer", example=1)
+     * )
+     *
+     * @OA\Schema(
+     *   schema="BomReorderRequest",
+     *   type="array",
+     *   @OA\Items(
+     *     type="object",
+     *     required={"id","sort_order"},
+     *     @OA\Property(property="id", type="integer", example=11),
+     *     @OA\Property(property="sort_order", type="integer", example=1)
+     *   )
+     * )
+     */
+    public function _bom() {}
+}
diff --git a/database/migrations/2025_08_25_153000_update_product_components_add_ref_type_and_material_id.php b/database/migrations/2025_08_25_153000_update_product_components_add_ref_type_and_material_id.php
new file mode 100644
index 0000000..8500333
--- /dev/null
+++ b/database/migrations/2025_08_25_153000_update_product_components_add_ref_type_and_material_id.php
@@ -0,0 +1,105 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        // 1) child_product_id 를 NULL 허용으로 변경 (MySQL 원시 SQL 사용)
+        //    (doctrine/dbal 없이 컬럼 수정)
+        DB::statement("
+            ALTER TABLE product_components
+            MODIFY child_product_id BIGINT UNSIGNED NULL COMMENT '하위 제품/부품 ID';
+        ");
+
+        Schema::table('product_components', function (Blueprint $table) {
+            // 2) ref_type, material_id 추가
+            $table->enum('ref_type', ['PRODUCT', 'MATERIAL'])
+                ->default('PRODUCT')
+                ->after('parent_product_id')
+                ->comment('참조 대상 타입(PRODUCT=제품, MATERIAL=자재)');
+
+            $table->unsignedBigInteger('material_id')
+                ->nullable()
+                ->after('child_product_id')
+                ->comment('자재 ID');
+
+            $table->foreign('material_id')
+                ->references('id')
+                ->on('materials')
+                ->nullOnDelete();
+        });
+
+        // 3) 기존 유니크 키 재정의:
+        //    (tenant_id, parent_product_id, ref_type, child_product_id, material_id, sort_order)
+        //    - 제품/자재 타입과 각각의 ID를 모두 포함하도록 변경
+        DB::statement("ALTER TABLE product_components DROP INDEX uq_component_row");
+        DB::statement("
+            ALTER TABLE product_components
+            ADD UNIQUE INDEX uq_component_row
+            (tenant_id, parent_product_id, ref_type, child_product_id, material_id, sort_order)
+        ");
+
+        // 4) (선택) CHECK 제약: MySQL 8.0.16+ 에서만 유효
+        //    ref_type=PRODUCT -> child_product_id NOT NULL AND material_id NULL
+        //    ref_type=MATERIAL -> material_id NOT NULL AND child_product_id NULL
+        try {
+            $version = DB::selectOne('SELECT VERSION() AS v')->v ?? '';
+            // 매우 단순한 버전체크 (8.0 이상일 때 시도)
+            if (preg_match('/^8\./', $version)) {
+                DB::statement("
+                    ALTER TABLE product_components
+                    ADD CONSTRAINT chk_ref_type_consistency
+                    CHECK (
+                        (ref_type = 'PRODUCT' AND child_product_id IS NOT NULL AND material_id IS NULL) OR
+                        (ref_type = 'MATERIAL' AND material_id IS NOT NULL AND child_product_id IS NULL)
+                    )
+                ");
+            }
+        } catch (\Throwable $e) {
+            // CHECK 미지원(DB버전/엔진)일 경우 무시하고 넘어갑니다.
+        }
+    }
+
+    public function down(): void
+    {
+        // CHECK 제약 삭제 (가능한 경우만)
+        try {
+            DB::statement("
+                ALTER TABLE product_components
+                DROP CHECK chk_ref_type_consistency
+            ");
+        } catch (\Throwable $e) {
+            // 무시
+        }
+
+        // 유니크 키를 원래대로 복구
+        try {
+            DB::statement("ALTER TABLE product_components DROP INDEX uq_component_row");
+        } catch (\Throwable $e) {
+            // 무시
+        }
+        DB::statement("
+            ALTER TABLE product_components
+            ADD UNIQUE INDEX uq_component_row
+            (tenant_id, parent_product_id, child_product_id, sort_order)
+        ");
+
+        Schema::table('product_components', function (Blueprint $table) {
+            // FK 우선 제거
+            $table->dropForeign(['material_id']);
+            // 컬럼 삭제
+            $table->dropColumn(['ref_type', 'material_id']);
+        });
+
+        // child_product_id 를 NOT NULL 로 되돌림
+        DB::statement("
+            ALTER TABLE product_components
+            MODIFY child_product_id BIGINT UNSIGNED NOT NULL COMMENT '하위 제품/부품 ID';
+        ");
+    }
+};
diff --git a/routes/api.php b/routes/api.php
index fca7902..1a49971 100644
--- a/routes/api.php
+++ b/routes/api.php
@@ -1,6 +1,7 @@
 <?php
 
-use App\Http\Controllers\Api\V1\ClassificationController;
+use App\Http\Controllers\Api\V1\CategoryLogController;
+use App\Http\Controllers\Api\V1\ProductBomItemController;
 use Illuminate\Http\Request;
 use Illuminate\Support\Facades\Route;
 use App\Http\Controllers\Api\V1\CommonController;
@@ -24,6 +25,9 @@
 use App\Http\Controllers\Api\V1\TenantOptionValueController;
 use App\Http\Controllers\Api\V1\TenantUserProfileController;
 use App\Http\Controllers\Api\V1\CategoryController;
+use App\Http\Controllers\Api\V1\CategoryFieldController;
+use App\Http\Controllers\Api\V1\CategoryTemplateController;
+use App\Http\Controllers\Api\V1\ClassificationController;
 
 // error test
 Route::get('/test-error', function () {
@@ -239,7 +243,51 @@
             Route::delete('/{id}', [CategoryController::class, 'destroy'])->name('v1.categories.destroy'); // 삭제(soft)
         });
 
-        // Product API
+        // Category Field API
+        Route::prefix('categories')->group(function () {
+            // 목록/생성 (카테고리 기준)
+            Route::get   ('/{id}/fields',                  [CategoryFieldController::class, 'index'])->name('v1.categories.fields.index');   // ?page&size&sort&order
+            Route::post  ('/{id}/fields',                  [CategoryFieldController::class, 'store'])->name('v1.categories.fields.store');
+
+            // 단건
+            Route::get   ('/fields/{field}',               [CategoryFieldController::class, 'show'])->name('v1.categories.fields.show');
+            Route::patch ('/fields/{field}',               [CategoryFieldController::class, 'update'])->name('v1.categories.fields.update');
+            Route::delete('/fields/{field}',               [CategoryFieldController::class, 'destroy'])->name('v1.categories.fields.destroy');
+
+            // 일괄 정렬/업서트
+            Route::post  ('/{id}/fields/reorder',          [CategoryFieldController::class, 'reorder'])->name('v1.categories.fields.reorder'); // [{id,sort_order}]
+            Route::put   ('/{id}/fields/bulk-upsert',      [CategoryFieldController::class, 'bulkUpsert'])->name('v1.categories.fields.bulk'); // [{id?,field_key,...}]
+        });
+
+
+        // Category Template API
+        Route::prefix('categories')->group(function () {
+            // 버전 목록/생성 (카테고리 기준)
+            Route::get   ('/{id}/templates',               [CategoryTemplateController::class, 'index'])->name('v1.categories.templates.index');   // ?page&size
+            Route::post  ('/{id}/templates',               [CategoryTemplateController::class, 'store'])->name('v1.categories.templates.store');   // 새 버전 등록
+
+            // 단건
+            Route::get   ('/templates/{tpl}',              [CategoryTemplateController::class, 'show'])->name('v1.categories.templates.show');
+            Route::patch ('/templates/{tpl}',              [CategoryTemplateController::class, 'update'])->name('v1.categories.templates.update'); // remarks 등 메타 수정
+            Route::delete('/templates/{tpl}',              [CategoryTemplateController::class, 'destroy'])->name('v1.categories.templates.destroy');
+
+            // 운영 편의
+            Route::post  ('/{id}/templates/{tpl}/apply',   [CategoryTemplateController::class, 'apply'])->name('v1.categories.templates.apply');   // 해당 버전 활성화
+            Route::get   ('/{id}/templates/{tpl}/preview', [CategoryTemplateController::class, 'preview'])->name('v1.categories.templates.preview');// 렌더용 스냅샷
+            // (선택) 버전 간 diff
+            Route::get   ('/{id}/templates/diff',          [CategoryTemplateController::class, 'diff'])->name('v1.categories.templates.diff');     // ?a=ver&b=ver
+        });
+
+
+        // Category Log API
+        Route::prefix('categories')->group(function () {
+            Route::get   ('/{id}/logs',                    [CategoryLogController::class, 'index'])->name('v1.categories.logs.index'); // ?action=&from=&to=&page&size
+            Route::get   ('/logs/{log}',                   [CategoryLogController::class, 'show'])->name('v1.categories.logs.show');
+            // (선택) 특정 변경 시점으로 카테고리 복구(템플릿/필드와 별개)
+            // Route::post('{id}/logs/{log}/restore',        [CategoryLogController::class, 'restore'])->name('v1.categories.logs.restore');
+        });
+
+        // Classifications API
         Route::prefix('classifications')->group(function () {
             Route::get   ('',        [ClassificationController::class, 'index'])->name('v1.classifications.index');   // 목록
             Route::post  ('',        [ClassificationController::class, 'store'])->name('v1.classifications.store');   // 생성
@@ -248,5 +296,31 @@
             Route::delete('/{id}',   [ClassificationController::class, 'destroy'])->whereNumber('id')->name('v1.classifications.destroy'); // 삭제
         });
 
+        // Products (모델/부품/서브어셈블리)
+        Route::prefix('products')->group(function () {
+            Route::get   ('',        [ProductController::class, 'index'])->name('v1.products.index');     // 목록/검색(q, category_id, product_type, active, page/size)
+            Route::post  ('',        [ProductController::class, 'store'])->name('v1.products.store');     // 생성
+            Route::get   ('/{id}',   [ProductController::class, 'show'])->name('v1.products.show');       // 단건
+            Route::patch ('/{id}',   [ProductController::class, 'update'])->name('v1.products.update');   // 수정
+            Route::delete('/{id}',   [ProductController::class, 'destroy'])->name('v1.products.destroy'); // 삭제(soft)
+
+            // (선택) 드롭다운/모달용 간편 검색 & 활성 토글
+            Route::get   ('/search', [ProductController::class, 'search'])->name('v1.products.search');
+            Route::post  ('/{id}/toggle', [ProductController::class, 'toggle'])->name('v1.products.toggle');
+        });
+
+        // BOM (product_components: ref_type=PRODUCT|MATERIAL)
+        Route::prefix('products/{id}/bom')->group(function () {
+            Route::get   ('/items',         [ProductBomItemController::class, 'index'])->name('v1.products.bom.items.index');     // 조회(제품+자재 병합)
+            Route::post  ('/items/bulk',    [ProductBomItemController::class, 'bulkUpsert'])->name('v1.products.bom.items.bulk'); // 대량 업서트
+            Route::patch ('/items/{item}',  [ProductBomItemController::class, 'update'])->name('v1.products.bom.items.update');   // 단건 수정
+            Route::delete('/items/{item}',  [ProductBomItemController::class, 'destroy'])->name('v1.products.bom.items.destroy'); // 단건 삭제
+            Route::post  ('/items/reorder', [ProductBomItemController::class, 'reorder'])->name('v1.products.bom.items.reorder'); // 정렬 변경
+
+            // (선택) 합계/검증
+            Route::get   ('/summary',       [ProductBomItemController::class, 'summary'])->name('v1.products.bom.summary');
+            Route::get   ('/validate',      [ProductBomItemController::class, 'validateBom'])->name('v1.products.bom.validate');
+        });
+
     });
 });