feat: align RU validation, error contract, and generator runtime templates

Wire DSL-derived field labels, safe API error JSON (string|string[]), decimal/enum DTO fixes, and client dataProvider without comma-splitting. Add generation/templates/runtime as canonical source copied on generate; extend AID bundle, prompts, validation gate, and docs.

client/src/App.tsx

@@ -1,6 +1,7 @@
 import { Admin, Resource } from 'react-admin';
 import dataProvider from './dataProvider';
 import authProvider from './auth/authProvider';
+import { AppNotification } from './AppNotification';
 
 import { EquipmentTypeList } from './resources/equipment-type/EquipmentTypeList';
 import { EquipmentTypeCreate } from './resources/equipment-type/EquipmentTypeCreate';
@@ -18,7 +19,12 @@ import { RepairOrderEdit } from './resources/repair-order/RepairOrderEdit';
 import { RepairOrderShow } from './resources/repair-order/RepairOrderShow';
 
 const App = () => (
-  <Admin dataProvider={dataProvider} authProvider={authProvider} requireAuth>
+  <Admin
+    dataProvider={dataProvider}
+    authProvider={authProvider}
+    notification={AppNotification}
+    requireAuth
+  >
     <Resource
       name="equipment-types"
       options={{ label: 'Виды оборудования' }}

client/src/AppNotification.tsx

@@ -0,0 +1,16 @@
+import { Notification, NotificationProps } from 'react-admin';
+
+export const AppNotification = (props: NotificationProps) => (
+  <Notification
+    {...props}
+    sx={{
+      whiteSpace: 'pre-line',
+      '& .MuiAlert-message': {
+        whiteSpace: 'pre-line',
+      },
+      '& .MuiSnackbarContent-message': {
+        whiteSpace: 'pre-line',
+      },
+    }}
+  />
+);

client/src/dataProvider.ts

@@ -4,6 +4,33 @@ import { env } from './config/env';
 
 const apiUrl = env.apiUrl;
 
+/** HTTP status from fetch / react-admin error objects (avoid coupling the client to Nest). */
+type HttpStatusCode = number;
+
+/** JSON body shape returned by ApiExceptionFilter (and compatible Nest errors). */
+type ApiErrorBody = {
+  message?: string | string[];
+  code?: string;
+  details?: unknown;
+};
+
+/** Shape thrown by fetchUtils.fetchJson on non-2xx responses. */
+type FetchJsonError = {
+  status?: HttpStatusCode;
+  body?: ApiErrorBody;
+  message?: string;
+};
+
+function userMessageFromApiBody(
+  body: ApiErrorBody | undefined,
+  fallback: string,
+): string {
+  const raw = body?.message;
+  if (Array.isArray(raw)) return raw.join('\n');
+  if (typeof raw === 'string') return raw;
+  return fallback;
+}
+
 const httpClient = async (url: string, options: fetchUtils.Options = {}) => {
   const token = await getValidAccessToken();
   const headers = new Headers(options.headers ?? { Accept: 'application/json' });
@@ -15,23 +42,14 @@ const httpClient = async (url: string, options: fetchUtils.Options = {}) => {
       headers,
     });
   } catch (error: unknown) {
-    const e = error as {
+    const fetchError = error as FetchJsonError;
-      status?: number;
+    const fromPayload = userMessageFromApiBody(fetchError.body, '');
-      body?: {
+    const fallbackMessage = fetchError.message || 'Request failed';
-        message?: string | string[];
-        details?: unknown;
-      };
-      message?: string;
-    };
-    const messageFromBody = e?.body?.message;
-    const normalizedMessage = Array.isArray(messageFromBody)
-      ? messageFromBody.join(', ')
-      : messageFromBody;
 
     throw new HttpError(
-      normalizedMessage || e?.message || 'Request failed',
+      fromPayload || fallbackMessage,
-      e?.status ?? 500,
+      fetchError.status ?? 500,
-      e?.body,
+      fetchError.body,
     );
   }
 };

client/src/resources/equipment/EquipmentEdit.tsx

@@ -10,7 +10,7 @@ const statusChoices = [
 export const EquipmentEdit = () => (
   <Edit>
     <SimpleForm>
-      <TextInput source="id" label="id" disabled />
+      <TextInput source="id" label="Идентификатор" disabled />
       <TextInput source="inventoryNumber" label="Инвентарный номер" isRequired />
       <TextInput source="serialNumber" label="Заводской (серийный) номер"  />
       <TextInput source="name" label="Наименование единицы оборудования" isRequired />

client/src/resources/equipment/EquipmentList.tsx

@@ -47,7 +47,7 @@ const EquipmentListActions = () => (
 export const EquipmentList = () => (
   <List actions={<EquipmentListActions />} filters={equipmentFilters} sort={{ field: 'inventoryNumber', order: 'ASC' }}>
     <Datagrid rowClick="show">
-      <TextField source="id" label="id" />
+      <TextField source="id" label="Идентификатор" />
       <TextField source="inventoryNumber" label="Инвентарный номер" />
       <TextField source="serialNumber" label="Заводской (серийный) номер" />
       <TextField source="name" label="Наименование единицы оборудования" />

client/src/resources/equipment/EquipmentShow.tsx

@@ -9,7 +9,7 @@ const statusChoices = [
 export const EquipmentShow = () => (
   <Show>
     <SimpleShowLayout>
-      <TextField source="id" label="id" />
+      <TextField source="id" label="Идентификатор" />
       <TextField source="inventoryNumber" label="Инвентарный номер" />
       <TextField source="serialNumber" label="Заводской (серийный) номер" />
       <TextField source="name" label="Наименование единицы оборудования" />

client/src/resources/repair-order/RepairOrderEdit.tsx

@@ -20,7 +20,7 @@ const statusChoices = [
 export const RepairOrderEdit = () => (
   <Edit>
     <SimpleForm>
-      <TextInput source="id" label="id" disabled />
+      <TextInput source="id" label="Идентификатор" disabled />
       <TextInput source="number" label="Номер заявки" isRequired />
       <ReferenceInput source="equipmentId" reference="equipment">
         <AutocompleteInput label="Оборудование" optionText={(record) => record.inventoryNumber ? `${record.inventoryNumber} — ${record.name ?? record.inventoryNumber}` : (record.name ?? record.id)} filterToQuery={(searchText) => ({ q: searchText })} />

client/src/resources/repair-order/RepairOrderList.tsx

@@ -58,7 +58,7 @@ const RepairOrderListActions = () => (
 export const RepairOrderList = () => (
   <List actions={<RepairOrderListActions />} filters={repairOrderFilters} sort={{ field: 'number', order: 'ASC' }}>
     <Datagrid rowClick="show">
-      <TextField source="id" label="id" />
+      <TextField source="id" label="Идентификатор" />
       <TextField source="number" label="Номер заявки" />
       <ReferenceField source="equipmentId" reference="equipment" label="Оборудование" link="show">
         <TextField source="inventoryNumber" />

client/src/resources/repair-order/RepairOrderShow.tsx

@@ -19,7 +19,7 @@ const statusChoices = [
 export const RepairOrderShow = () => (
   <Show>
     <SimpleShowLayout>
-      <TextField source="id" label="id" />
+      <TextField source="id" label="Идентификатор" />
       <TextField source="number" label="Номер заявки" />
       <ReferenceField source="equipmentId" reference="equipment" label="Оборудование" link="show">
         <TextField source="inventoryNumber" />

docs/AID_EXPORT_README.md

@@ -80,7 +80,7 @@ X-AID-Export-Key: <если задан AID_EXPORT_API_KEY>
 }
 ```
 
-- **`apply: false`** (рекомендуется для AID): в ответе **`files`** — объект «путь от корня репо → текст файла». Диск на сервере не меняется.
+- **`apply: false`** (рекомендуется для AID): в ответе **`files`** — объект «путь от корня репо → текст файла». Диск на сервере не меняется. В бандл входят сгенерированные модули, `App.tsx`, **`server/src/common/field-labels.generated.ts`** (из DSL) и **канонические шаблоны рантайма** из **`generation/templates/runtime/`** (копируются в `server/src/main.ts`, `ApiExceptionFilter`, `dataProvider`, `AppNotification` при `npm run generate:from-dsl`).
 - **`apply: true`**: выполняется запись файлов как у `npm run generate:from-dsl` с `--apply`; нужен **`AID_GENERATOR_ALLOW_APPLY=1`**.
 
 **Ответ (бандл):** `{ "applied": false, "entityCount": N, "enumCount": M, "files": { ... } }`  

generation/generate.mjs

@@ -7,6 +7,14 @@ import { fileURLToPath } from 'node:url';
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = path.dirname(__filename);
 const ROOT = path.resolve(__dirname, '..');
+/** Canonical runtime files for API errors + RA dataProvider; copied into server/ and client/ on each generate --apply. */
+const RUNTIME_TEMPLATE_DIR = path.join(__dirname, 'templates', 'runtime');
+const RUNTIME_TEMPLATE_FILES = [
+  ['api-exception.filter.ts', 'server/src/common/filters/api-exception.filter.ts'],
+  ['dataProvider.ts', 'client/src/dataProvider.ts'],
+  ['AppNotification.tsx', 'client/src/AppNotification.tsx'],
+  ['main.ts', 'server/src/main.ts'],
+];
 
 function readFile(p) {
   return fs.readFileSync(p, 'utf8');
@@ -178,6 +186,7 @@ function getReferenceDisplayExpr(foreignEntity) {
 
 function getAttributeLabel(attr, allEntities) {
   if (attr.label && attr.label !== attr.name) return attr.label;
+  if (attr.name === 'id' && attr.type === 'uuid') return 'Идентификатор';
   if (attr.name === 'status') return 'Статус';
   if (attr.name === 'equipmentId') return 'Оборудование';
   if (attr.name === 'equipmentTypeCode') return 'Вид оборудования';
@@ -260,6 +269,55 @@ function generatePrismaModel(name, entity, allEntities) {
   return `${lines.join('\n')}\n`;
 }
 
+/** Human-readable field labels for ValidationPipe messages (derived from DSL descriptions). */
+function renderFieldLabelsGenerated(parsed) {
+  const { entities } = parsed;
+  const map = new Map();
+  for (const ent of Object.values(entities)) {
+    for (const a of ent.attributes) {
+      const label = getAttributeLabel(a, entities);
+      const prev = map.get(a.name);
+      if (prev === undefined) {
+        map.set(a.name, label);
+      } else if (String(label).length > String(prev).length) {
+        map.set(a.name, label);
+      }
+    }
+  }
+  const keys = [...map.keys()].sort();
+  const lines = keys.map((k) => `  ${JSON.stringify(k)}: ${JSON.stringify(map.get(k))},`);
+  return `/** AUTO-GENERATED from domain DSL (generation/generate.mjs). Do not edit by hand. */\nexport const FIELD_LABELS: Record<string, string> = {\n${lines.join('\n')}\n};\n`;
+}
+
+function ensureFieldLabels(parsed, apply) {
+  const rel = 'server/src/common/field-labels.generated.ts';
+  const content = renderFieldLabelsGenerated(parsed);
+  if (apply) writeFile(path.join(ROOT, rel), content);
+  return { rel, content };
+}
+
+function loadRuntimeTemplateFiles() {
+  const out = {};
+  for (const [name, rel] of RUNTIME_TEMPLATE_FILES) {
+    const abs = path.join(RUNTIME_TEMPLATE_DIR, name);
+    if (!fs.existsSync(abs)) {
+      throw new Error(`Missing generator runtime template: ${abs}`);
+    }
+    out[rel] = readFile(abs);
+  }
+  return out;
+}
+
+function applyRuntimeTemplateFiles(apply) {
+  const files = loadRuntimeTemplateFiles();
+  if (apply) {
+    for (const [rel, content] of Object.entries(files)) {
+      writeFile(path.join(ROOT, rel), content);
+    }
+  }
+  return files;
+}
+
 function ensurePrismaSchema({ enums, entities }, prismaPath, apply) {
   const existing = fs.existsSync(prismaPath) ? readFile(prismaPath) : '';
   const hasGenerator = /generator\s+client\s*\{/m.test(existing);
@@ -279,7 +337,7 @@ function ensurePrismaSchema({ enums, entities }, prismaPath, apply) {
   return { changed: true, content: next };
 }
 
-function renderBackendModule(entityName, entity, resourceName, pk) {
+function renderBackendModule(entityName, entity, resourceName, pk, enums) {
   const className = entityName;
   const moduleName = `${className}Module`;
   const serviceName = `${className}Service`;
@@ -296,7 +354,7 @@ function renderBackendModule(entityName, entity, resourceName, pk) {
       case 'integer':
         return 'number';
       case 'decimal':
-        return 'string';
+        return 'number';
       case 'date':
         return 'string';
       default:
@@ -332,19 +390,32 @@ function renderBackendModule(entityName, entity, resourceName, pk) {
         needsTypeImport = true;
         break;
       case 'decimal':
-        decorators.push(`@IsNumberString({}, { message: '${field}: должно быть числом' })`);
+        decorators.push('@Type(() => Number)');
-        imports.add('IsNumberString');
+        decorators.push(
+          `@IsNumber({ allowNaN: false, allowInfinity: false }, { message: '${field}: должно быть числом' })`,
+        );
+        imports.add('IsNumber');
+        needsTypeImport = true;
         break;
       case 'date':
         decorators.push(`@IsISO8601({}, { message: '${field}: должно содержать корректную дату' })`);
         imports.add('IsISO8601');
         break;
-      default:
+      default: {
-        // enum (kept as string in generated DTOs)
+        const vals = enums?.[attr.type]?.values;
+        if (vals && vals.length) {
+          const list = vals.map((v) => `'${v}'`).join(', ');
+          decorators.push(
+            `@IsIn([${list}], { message: '${field}: недопустимое значение' })`,
+          );
+          imports.add('IsIn');
+        } else {
           decorators.push(`@IsString({ message: '${field}: должно быть строкой' })`);
           imports.add('IsString');
+        }
         break;
       }
+    }
 
     if (!isUpdate && attr.isRequired && !(attr.isPrimary && attr.type === 'uuid')) {
       decorators.push(`@IsNotEmpty({ message: '${field}: обязательное поле' })`);
@@ -730,6 +801,22 @@ function ensureClientApp(apply, frontendResources) {
         );
       }
     }
+    if (!out.includes("from './AppNotification'")) {
+      out = out.replace(
+        /import authProvider from '\.\/auth\/authProvider';/,
+        `import authProvider from './auth/authProvider';\nimport { AppNotification } from './AppNotification';`,
+      );
+    }
+    if (!out.includes('notification={AppNotification}')) {
+      out = out.replace(
+        /<Admin dataProvider=\{dataProvider\} authProvider=\{authProvider\} requireAuth>/,
+        '<Admin\n    dataProvider={dataProvider}\n    authProvider={authProvider}\n    notification={AppNotification}\n    requireAuth\n  >',
+      );
+      out = out.replace(
+        /(<Admin\n\s*dataProvider=\{dataProvider\}\n\s*authProvider=\{authProvider\})(\n\s*requireAuth)/,
+        '$1\n    notification={AppNotification}$2',
+      );
+    }
     return out;
   });
 }
@@ -741,13 +828,23 @@ function collectGeneratedBundle(parsed) {
   const pr = ensurePrismaSchema(parsed, prismaPath, false);
   files['server/prisma/schema.prisma'] = pr.content;
 
+  const fieldLabels = ensureFieldLabels(parsed, false);
+  files[fieldLabels.rel] = fieldLabels.content;
+
   const backendModules = [];
   const frontendResources = [];
   for (const [entityName, ent] of Object.entries(parsed.entities)) {
     const pk = ent.primaryKey;
     const resource = pluralize(toKebab(entityName));
-    const be = renderBackendModule(entityName, ent, resource, pk);
+    const be = renderBackendModule(entityName, ent, resource, pk, parsed.enums);
-    const fe = renderFrontendResource(entityName, ent, resource, pk, parsed.enums);
+    const fe = renderFrontendResource(
+      entityName,
+      ent,
+      resource,
+      pk,
+      parsed.enums,
+      parsed.entities,
+    );
     backendModules.push(be);
     frontendResources.push(fe);
     Object.assign(files, be.files, fe.files);
@@ -758,6 +855,8 @@ function collectGeneratedBundle(parsed) {
   const clientApp = ensureClientApp(false, frontendResources);
   files['client/src/App.tsx'] = clientApp.content;
 
+  Object.assign(files, loadRuntimeTemplateFiles());
+
   return {
     entityCount: Object.keys(parsed.entities).length,
     enumCount: Object.keys(parsed.enums).length,
@@ -785,6 +884,7 @@ function main() {
   // Prisma schema
   const prismaPath = path.join(ROOT, 'server/prisma/schema.prisma');
   ensurePrismaSchema(parsed, prismaPath, apply);
+  ensureFieldLabels(parsed, apply);
 
   // Backend modules + frontend resources
   const backendModules = [];
@@ -792,7 +892,7 @@ function main() {
   for (const [entityName, ent] of Object.entries(parsed.entities)) {
     const pk = ent.primaryKey;
     const resource = pluralize(toKebab(entityName));
-    const be = renderBackendModule(entityName, ent, resource, pk);
+    const be = renderBackendModule(entityName, ent, resource, pk, parsed.enums);
     const fe = renderFrontendResource(entityName, ent, resource, pk, parsed.enums, parsed.entities);
     backendModules.push(be);
     frontendResources.push(fe);
@@ -805,6 +905,7 @@ function main() {
 
   ensureAppModule(apply, backendModules);
   ensureClientApp(apply, frontendResources);
+  applyRuntimeTemplateFiles(apply);
 
   process.stdout.write(
     `${apply ? 'Generated' : 'Planned'} ${Object.keys(parsed.entities).length} entities from ${dslPath}\n`

generation/templates/runtime/AppNotification.tsx

@@ -0,0 +1,16 @@
+import { Notification, NotificationProps } from 'react-admin';
+
+export const AppNotification = (props: NotificationProps) => (
+  <Notification
+    {...props}
+    sx={{
+      whiteSpace: 'pre-line',
+      '& .MuiAlert-message': {
+        whiteSpace: 'pre-line',
+      },
+      '& .MuiSnackbarContent-message': {
+        whiteSpace: 'pre-line',
+      },
+    }}
+  />
+);

generation/templates/runtime/api-exception.filter.ts

@@ -0,0 +1,184 @@
+import {
+  ArgumentsHost,
+  BadRequestException,
+  Catch,
+  ExceptionFilter,
+  HttpException,
+  HttpStatus,
+  Logger,
+} from '@nestjs/common';
+import { Prisma } from '@prisma/client';
+import { Request, Response } from 'express';
+
+type ErrorResponseBody = {
+  statusCode: number;
+  message: string | string[];
+  code: string;
+  details?: unknown;
+  path: string;
+  timestamp: string;
+};
+
+@Catch()
+export class ApiExceptionFilter implements ExceptionFilter {
+  private readonly logger = new Logger(ApiExceptionFilter.name);
+
+  catch(exception: unknown, host: ArgumentsHost) {
+    const ctx = host.switchToHttp();
+    const response = ctx.getResponse<Response>();
+    const request = ctx.getRequest<Request>();
+
+    const mapped = this.mapException(exception);
+    const body: ErrorResponseBody = {
+      statusCode: mapped.statusCode,
+      message: mapped.message,
+      code: mapped.code,
+      ...(mapped.details !== undefined ? { details: mapped.details } : {}),
+      path: request.url,
+      timestamp: new Date().toISOString(),
+    };
+
+    if (mapped.statusCode >= 500) {
+      const logDetail =
+        exception instanceof Error ? exception.message : String(mapped.message);
+      this.logger.error(
+        `Unhandled error on ${request.method} ${request.url}: ${logDetail}`,
+        exception instanceof Error ? exception.stack : undefined,
+      );
+    }
+
+    response.status(mapped.statusCode).json(body);
+  }
+
+  private mapException(exception: unknown): {
+    statusCode: number;
+    message: string | string[];
+    code: string;
+    details?: unknown;
+  } {
+    if (exception instanceof HttpException) {
+      const statusCode = exception.getStatus();
+      const payload = exception.getResponse() as
+        | string
+        | {
+            message?: string | string[];
+            error?: string;
+            code?: string;
+            details?: unknown;
+          };
+
+      if (typeof payload === 'string') {
+        return {
+          statusCode,
+          message: payload,
+          code: `HTTP_${statusCode}`,
+        };
+      }
+
+      const rawMessage = payload?.message ?? exception.message;
+      const message: string | string[] = Array.isArray(rawMessage)
+        ? rawMessage.map((m) => String(m))
+        : typeof rawMessage === 'string' && rawMessage.length > 0
+          ? rawMessage
+          : String(exception.message ?? 'Bad Request');
+
+      return {
+        statusCode,
+        message,
+        code: payload?.code ?? payload?.error ?? `HTTP_${statusCode}`,
+        details: payload?.details,
+      };
+    }
+
+    if (exception instanceof Prisma.PrismaClientKnownRequestError) {
+      return this.mapPrismaKnownRequestError(exception);
+    }
+
+    if (exception instanceof Prisma.PrismaClientValidationError) {
+      return {
+        statusCode: HttpStatus.BAD_REQUEST,
+        message:
+          'Некорректные данные запроса. Проверьте обязательные поля и форматы значений.',
+        code: 'PRISMA_VALIDATION_ERROR',
+      };
+    }
+
+    if (exception instanceof Prisma.PrismaClientInitializationError) {
+      return {
+        statusCode: HttpStatus.SERVICE_UNAVAILABLE,
+        message: 'Сервис базы данных временно недоступен.',
+        code: 'DATABASE_UNAVAILABLE',
+      };
+    }
+
+    if (exception instanceof Prisma.PrismaClientRustPanicError) {
+      return {
+        statusCode: HttpStatus.INTERNAL_SERVER_ERROR,
+        message: 'Внутренняя ошибка сервера.',
+        code: 'DATABASE_ENGINE_PANIC',
+      };
+    }
+
+    if (exception instanceof Error) {
+      return {
+        statusCode: HttpStatus.INTERNAL_SERVER_ERROR,
+        message: 'Внутренняя ошибка сервера.',
+        code: 'INTERNAL_ERROR',
+      };
+    }
+
+    return {
+      statusCode: HttpStatus.INTERNAL_SERVER_ERROR,
+      message: 'Внутренняя ошибка сервера.',
+      code: 'INTERNAL_ERROR',
+    };
+  }
+
+  private mapPrismaKnownRequestError(
+    exception: Prisma.PrismaClientKnownRequestError,
+  ): {
+    statusCode: number;
+    message: string;
+    code: string;
+    details?: unknown;
+  } {
+    switch (exception.code) {
+      case 'P2002': {
+        const target = Array.isArray(exception.meta?.target)
+          ? exception.meta?.target.join(', ')
+          : String(exception.meta?.target ?? '');
+        return {
+          statusCode: HttpStatus.CONFLICT,
+          message: target
+            ? `Запись с таким значением уже существует (${target}).`
+            : 'Запись с таким значением уже существует.',
+          code: 'UNIQUE_CONSTRAINT_VIOLATION',
+          details: exception.meta,
+        };
+      }
+      case 'P2003':
+        return {
+          statusCode: HttpStatus.CONFLICT,
+          message:
+            'Операцию нельзя выполнить из-за связанных данных или некорректной ссылки.',
+          code: 'FOREIGN_KEY_CONSTRAINT_VIOLATION',
+          details: exception.meta,
+        };
+      case 'P2025':
+        return {
+          statusCode: HttpStatus.NOT_FOUND,
+          message: 'Запись не найдена.',
+          code: 'RECORD_NOT_FOUND',
+          details: exception.meta,
+        };
+      default:
+        return {
+          statusCode: HttpStatus.BAD_REQUEST,
+          message: 'Ошибка при обработке данных в базе.',
+          code: exception.code,
+          details: exception.meta,
+        };
+    }
+  }
+}
+

generation/templates/runtime/dataProvider.ts

@@ -0,0 +1,185 @@
+import { DataProvider, fetchUtils, HttpError } from 'react-admin';
+import { getValidAccessToken } from './auth/keycloak';
+import { env } from './config/env';
+
+const apiUrl = env.apiUrl;
+
+/** HTTP status from fetch / react-admin error objects (avoid coupling the client to Nest). */
+type HttpStatusCode = number;
+
+/** JSON body shape returned by ApiExceptionFilter (and compatible Nest errors). */
+type ApiErrorBody = {
+  message?: string | string[];
+  code?: string;
+  details?: unknown;
+};
+
+/** Shape thrown by fetchUtils.fetchJson on non-2xx responses. */
+type FetchJsonError = {
+  status?: HttpStatusCode;
+  body?: ApiErrorBody;
+  message?: string;
+};
+
+function userMessageFromApiBody(
+  body: ApiErrorBody | undefined,
+  fallback: string,
+): string {
+  const raw = body?.message;
+  if (Array.isArray(raw)) return raw.join('\n');
+  if (typeof raw === 'string') return raw;
+  return fallback;
+}
+
+const httpClient = async (url: string, options: fetchUtils.Options = {}) => {
+  const token = await getValidAccessToken();
+  const headers = new Headers(options.headers ?? { Accept: 'application/json' });
+  headers.set('Authorization', `Bearer ${token}`);
+
+  try {
+    return await fetchUtils.fetchJson(url, {
+      ...options,
+      headers,
+    });
+  } catch (error: unknown) {
+    const fetchError = error as FetchJsonError;
+    const fromPayload = userMessageFromApiBody(fetchError.body, '');
+    const fallbackMessage = fetchError.message || 'Request failed';
+
+    throw new HttpError(
+      fromPayload || fallbackMessage,
+      fetchError.status ?? 500,
+      fetchError.body,
+    );
+  }
+};
+
+function buildQueryString(query: Record<string, unknown>) {
+  const search = new URLSearchParams();
+  Object.entries(query).forEach(([key, val]) => {
+    if (val === undefined || val === null || val === '') return;
+    if (Array.isArray(val)) {
+      val.forEach((v) => {
+        if (v === undefined || v === null || v === '') return;
+        search.append(key, String(v));
+      });
+      return;
+    }
+    search.set(key, String(val));
+  });
+  return search.toString();
+}
+
+const dataProvider: DataProvider = {
+  getList: async (resource, params) => {
+    const { page, perPage } = params.pagination!;
+    const { field, order } = params.sort!;
+    const start = (page - 1) * perPage;
+    const end = page * perPage;
+
+    const query: Record<string, unknown> = {
+      _start: start,
+      _end: end,
+      _sort: field,
+      _order: order,
+      ...(params.filter ?? {}),
+    };
+
+    const queryString = buildQueryString(query);
+    const url = `${apiUrl}/${resource}?${queryString}`;
+    const { json, headers } = await httpClient(url);
+
+    const contentRange = headers.get('Content-Range');
+    const total = contentRange
+      ? parseInt(contentRange.split('/').pop() || '0', 10)
+      : json.length;
+
+    return { data: json, total };
+  },
+
+  getOne: async (resource, params) => {
+    const { json } = await httpClient(`${apiUrl}/${resource}/${params.id}`);
+    return { data: json };
+  },
+
+  getMany: async (resource, params) => {
+    const query = params.ids.map((id) => `id=${id}`).join('&');
+    const { json } = await httpClient(`${apiUrl}/${resource}?${query}`);
+    return { data: json };
+  },
+
+  getManyReference: async (resource, params) => {
+    const { page, perPage } = params.pagination!;
+    const { field, order } = params.sort!;
+    const start = (page - 1) * perPage;
+    const end = page * perPage;
+
+    const query: Record<string, unknown> = {
+      _start: start,
+      _end: end,
+      _sort: field,
+      _order: order,
+      [params.target]: params.id,
+      ...(params.filter ?? {}),
+    };
+
+    const queryString = buildQueryString(query);
+    const url = `${apiUrl}/${resource}?${queryString}`;
+    const { json, headers } = await httpClient(url);
+
+    const contentRange = headers.get('Content-Range');
+    const total = contentRange
+      ? parseInt(contentRange.split('/').pop() || '0', 10)
+      : json.length;
+
+    return { data: json, total };
+  },
+
+  create: async (resource, params) => {
+    const { json } = await httpClient(`${apiUrl}/${resource}`, {
+      method: 'POST',
+      body: JSON.stringify(params.data),
+    });
+    return { data: json };
+  },
+
+  update: async (resource, params) => {
+    const { json } = await httpClient(`${apiUrl}/${resource}/${params.id}`, {
+      method: 'PATCH',
+      body: JSON.stringify(params.data),
+    });
+    return { data: json };
+  },
+
+  updateMany: async (resource, params) => {
+    const responses = await Promise.all(
+      params.ids.map((id) =>
+        httpClient(`${apiUrl}/${resource}/${id}`, {
+          method: 'PATCH',
+          body: JSON.stringify(params.data),
+        })
+      )
+    );
+    return { data: responses.map(({ json }) => json.id) };
+  },
+
+  delete: async (resource, params) => {
+    const { json } = await httpClient(`${apiUrl}/${resource}/${params.id}`, {
+      method: 'DELETE',
+    });
+    return { data: json };
+  },
+
+  deleteMany: async (resource, params) => {
+    const responses = await Promise.all(
+      params.ids.map((id) =>
+        httpClient(`${apiUrl}/${resource}/${id}`, {
+          method: 'DELETE',
+        })
+      )
+    );
+    return { data: responses.map(({ json }) => json.id) };
+  },
+};
+
+export default dataProvider;

generation/templates/runtime/main.ts

@@ -0,0 +1,111 @@
+import { NestFactory } from '@nestjs/core';
+import { ConfigService } from '@nestjs/config';
+import {
+  BadRequestException,
+  ValidationError,
+  ValidationPipe,
+} from '@nestjs/common';
+import { AppModule } from './app.module';
+import { RuntimeEnvironment } from './config/env.validation';
+import { ApiExceptionFilter } from './common/filters/api-exception.filter';
+import { FIELD_LABELS } from './common/field-labels.generated';
+
+function prettifyFieldName(field: string): string {
+  if (FIELD_LABELS[field]) return FIELD_LABELS[field];
+  const withSpaces = field
+    .replace(/([a-z0-9])([A-Z])/g, '$1 $2')
+    .replace(/_/g, ' ')
+    .trim();
+  if (!withSpaces) return field;
+  return withSpaces[0].toUpperCase() + withSpaces.slice(1);
+}
+
+function constraintToRuMessage(field: string, constraint: string): string {
+  const label = prettifyFieldName(field);
+  switch (constraint) {
+    case 'isNotEmpty':
+      return `Поле "${label}" обязательно`;
+    case 'isString':
+      return `Поле "${label}" должно быть строкой`;
+    case 'isInt':
+      return `Поле "${label}" должно быть целым числом`;
+    case 'isUUID':
+      return `Поле "${label}" должно быть UUID`;
+    case 'isNumberString':
+      return `Поле "${label}" должно быть числом`;
+    case 'isNumber':
+      return `Поле "${label}" должно быть числом`;
+    case 'isIso8601':
+      return `Поле "${label}" должно содержать корректную дату`;
+    case 'isEnum':
+    case 'isIn':
+      return `Поле "${label}" содержит недопустимое значение`;
+    default:
+      return `Поле "${label}" заполнено некорректно`;
+  }
+}
+
+function buildValidationMessages(errors: ValidationError[]): string[] {
+  const messages: string[] = [];
+
+  const walk = (errorList: ValidationError[]) => {
+    for (const error of errorList) {
+      if (error.constraints) {
+        const constraints = Object.keys(error.constraints);
+        // If field is empty, "required" is enough; skip type noise.
+        const filtered = constraints.includes('isNotEmpty')
+          ? ['isNotEmpty']
+          : constraints;
+        filtered.forEach((constraint) =>
+          messages.push(constraintToRuMessage(error.property, constraint)),
+        );
+      }
+      if (error.children?.length) walk(error.children);
+    }
+  };
+
+  walk(errors);
+  return Array.from(new Set(messages));
+}
+
+async function bootstrap() {
+  const app = await NestFactory.create(AppModule);
+  const configService = app.get<ConfigService<RuntimeEnvironment, true>>(
+    ConfigService,
+  );
+
+  const allowedOrigins = configService
+    .getOrThrow('CORS_ALLOWED_ORIGINS')
+    .split(',')
+    .map((origin) => origin.trim())
+    .filter((origin) => origin.length > 0);
+
+  app.enableCors({
+    origin: (origin, callback) => {
+      if (!origin || allowedOrigins.includes(origin)) {
+        callback(null, true);
+        return;
+      }
+      callback(new Error(`Origin ${origin} is not allowed by CORS`), false);
+    },
+    methods: ['GET', 'HEAD', 'PUT', 'PATCH', 'POST', 'DELETE', 'OPTIONS'],
+    allowedHeaders: ['Authorization', 'Content-Type'],
+    exposedHeaders: ['Content-Range'],
+    credentials: false,
+  });
+
+  app.useGlobalPipes(
+    new ValidationPipe({
+      transform: true,
+      whitelist: true,
+      forbidUnknownValues: false,
+      exceptionFactory: (errors) =>
+        new BadRequestException(buildValidationMessages(errors)),
+    }),
+  );
+  app.useGlobalFilters(new ApiExceptionFilter());
+
+  const port = configService.get('PORT', 3000);
+  await app.listen(port);
+}
+bootstrap();

prompts/general-prompt.md

@@ -140,6 +140,7 @@ COMPLETION INVARIANTS
 - Generation is incomplete if auth rules, runtime rules, and validation rules describe different truth paths.
 - Generation is incomplete if buildability is broken.
 - If buildability cannot be checked because dependencies are missing, report that state explicitly; do not report a green result for buildability.
+- Generation is incomplete if the **API error contract** (ValidationPipe + `ApiExceptionFilter` + client `dataProvider` + DSL-derived `field-labels.generated.ts`) drifts from `prompts/validation-rules.md` without an explicit exception.
 
 VALIDATION
 

prompts/validation-rules.md

@@ -87,6 +87,16 @@ Validation is now a lightweight automated gate instead of a prose-only checklist
   - `npx prisma migrate dev`
   - `npx prisma db seed`
 
+### API error contract (backend ↔ frontend)
+
+- Backend errors use the shared `ApiExceptionFilter` shape: `statusCode`, `message` (**`string` or `string[]`** — для списков ошибок валидации), `code`, optional `details`, `path`, `timestamp`.
+- Список ошибок валидации отдаётся в JSON как **`message: string[]`**, без склейки через `", "` на сервере (клиент сам склеивает для UI, например через `\n`).
+- Клиентский `dataProvider` не должен резать одну строку `message` по запятым — только обрабатывать массив или целую строку.
+- Подписи полей для русских сообщений `ValidationPipe` генерируются из DSL в **`server/src/common/field-labels.generated.ts`** (не дублировать огромный словарь вручную в `main.ts`).
+- Поля DSL `decimal` в DTO принимают **число** (как шлёт React Admin `NumberInput`); в сервисе конвертация в `Prisma.Decimal` сохраняется.
+- Атрибуты-enum в DTO валидируются **`@IsIn([...])`** по значениям enum из DSL, а не только `@IsString`.
+- Бандл AID (`collectGeneratedBundle`) включает копии **`generation/templates/runtime/*`** (`main.ts`, `api-exception.filter.ts`, `dataProvider.ts`, `AppNotification.tsx`) — это канонический источник для шва ошибок; при `--apply` они перезаписываются в `server/` и `client/`.
+
 ### Scaffold checks
 
 - backend initialization starts from official Nest CLI scaffolding

server/src/common/field-labels.generated.ts

@@ -0,0 +1,28 @@
+/** AUTO-GENERATED from domain DSL (generation/generate.mjs). Do not edit by hand. */
+export const FIELD_LABELS: Record<string, string> = {
+  "code": "Код вида оборудования",
+  "commissionedAt": "Дата ввода в эксплуатацию",
+  "completedAt": "Фактическая дата завершения",
+  "contractor": "Подрядная организация (если внешний ремонт)",
+  "description": "Описание работ / дефекта",
+  "engineHoursAtRepair": "Наработка на момент ремонта, моточасов",
+  "engineHoursSinceLastRepair": "Наработка с последнего ремонта, моточасов",
+  "equipmentId": "Оборудование",
+  "equipmentTypeCode": "Вид оборудования",
+  "id": "Идентификатор",
+  "inventoryNumber": "Инвентарный номер",
+  "lastRepairAt": "Дата последнего ремонта",
+  "location": "Место эксплуатации / скважина / куст",
+  "maintenanceIntervalHours": "Периодичность ТО, моточасов",
+  "manufacturer": "Производитель",
+  "name": "Наименование единицы оборудования",
+  "notes": "Примечания",
+  "number": "Номер заявки",
+  "overhaulIntervalHours": "Периодичность КР, моточасов",
+  "plannedAt": "Плановая дата начала",
+  "repairKind": "Вид ремонта",
+  "serialNumber": "Заводской (серийный) номер",
+  "startedAt": "Фактическая дата начала",
+  "status": "Текущий статус",
+  "totalEngineHours": "Общая наработка, моточасов",
+};

server/src/common/filters/api-exception.filter.ts

@@ -12,7 +12,7 @@ import { Request, Response } from 'express';
 
 type ErrorResponseBody = {
   statusCode: number;
-  message: string;
+  message: string | string[];
   code: string;
   details?: unknown;
   path: string;
@@ -39,8 +39,10 @@ export class ApiExceptionFilter implements ExceptionFilter {
     };
 
     if (mapped.statusCode >= 500) {
+      const logDetail =
+        exception instanceof Error ? exception.message : String(mapped.message);
       this.logger.error(
-        `Unhandled error on ${request.method} ${request.url}: ${mapped.message}`,
+        `Unhandled error on ${request.method} ${request.url}: ${logDetail}`,
         exception instanceof Error ? exception.stack : undefined,
       );
     }
@@ -50,7 +52,7 @@ export class ApiExceptionFilter implements ExceptionFilter {
 
   private mapException(exception: unknown): {
     statusCode: number;
-    message: string;
+    message: string | string[];
     code: string;
     details?: unknown;
   } {
@@ -74,9 +76,11 @@ export class ApiExceptionFilter implements ExceptionFilter {
       }
 
       const rawMessage = payload?.message ?? exception.message;
-      const message = Array.isArray(rawMessage)
+      const message: string | string[] = Array.isArray(rawMessage)
-        ? rawMessage.join(', ')
+        ? rawMessage.map((m) => String(m))
-        : rawMessage || exception.message;
+        : typeof rawMessage === 'string' && rawMessage.length > 0
+          ? rawMessage
+          : String(exception.message ?? 'Bad Request');
 
       return {
         statusCode,
@@ -118,21 +122,26 @@ export class ApiExceptionFilter implements ExceptionFilter {
     if (exception instanceof Error) {
       return {
         statusCode: HttpStatus.INTERNAL_SERVER_ERROR,
-        message: exception.message || 'Internal server error',
+        message: 'Внутренняя ошибка сервера.',
         code: 'INTERNAL_ERROR',
       };
     }
 
     return {
       statusCode: HttpStatus.INTERNAL_SERVER_ERROR,
-      message: 'Internal server error',
+      message: 'Внутренняя ошибка сервера.',
       code: 'INTERNAL_ERROR',
     };
   }
 
   private mapPrismaKnownRequestError(
     exception: Prisma.PrismaClientKnownRequestError,
-  ) {
+  ): {
+    statusCode: number;
+    message: string;
+    code: string;
+    details?: unknown;
+  } {
     switch (exception.code) {
       case 'P2002': {
         const target = Array.isArray(exception.meta?.target)

server/src/main.ts

@@ -8,34 +8,7 @@ import {
 import { AppModule } from './app.module';
 import { RuntimeEnvironment } from './config/env.validation';
 import { ApiExceptionFilter } from './common/filters/api-exception.filter';
-
+import { FIELD_LABELS } from './common/field-labels.generated';
-const FIELD_LABELS: Record<string, string> = {
-  code: 'Код',
-  name: 'Название',
-  manufacturer: 'Производитель',
-  maintenanceIntervalHours: 'Интервал ТО (часы)',
-  overhaulIntervalHours: 'Интервал капремонта (часы)',
-  inventoryNumber: 'Инвентарный номер',
-  serialNumber: 'Серийный номер',
-  equipmentTypeCode: 'Тип оборудования',
-  equipmentId: 'Оборудование',
-  status: 'Статус',
-  location: 'Местоположение',
-  commissionedAt: 'Дата ввода в эксплуатацию',
-  totalEngineHours: 'Наработка общая',
-  engineHoursSinceLastRepair: 'Наработка после ремонта',
-  lastRepairAt: 'Дата последнего ремонта',
-  notes: 'Примечание',
-  number: 'Номер',
-  repairKind: 'Вид ремонта',
-  plannedAt: 'Плановая дата',
-  startedAt: 'Дата начала',
-  completedAt: 'Дата завершения',
-  contractor: 'Подрядчик',
-  engineHoursAtRepair: 'Наработка на момент ремонта',
-  description: 'Описание',
-  id: 'Идентификатор',
-};
 
 function prettifyFieldName(field: string): string {
   if (FIELD_LABELS[field]) return FIELD_LABELS[field];
@@ -60,9 +33,12 @@ function constraintToRuMessage(field: string, constraint: string): string {
       return `Поле "${label}" должно быть UUID`;
     case 'isNumberString':
       return `Поле "${label}" должно быть числом`;
+    case 'isNumber':
+      return `Поле "${label}" должно быть числом`;
     case 'isIso8601':
       return `Поле "${label}" должно содержать корректную дату`;
     case 'isEnum':
+    case 'isIn':
       return `Поле "${label}" содержит недопустимое значение`;
     default:
       return `Поле "${label}" заполнено некорректно`;

server/src/modules/equipment/dto/create-equipment.dto.ts

@@ -1,4 +1,5 @@
-import { IsISO8601, IsNotEmpty, IsNumberString, IsString } from 'class-validator';
+import { IsISO8601, IsIn, IsNotEmpty, IsNumber, IsString } from 'class-validator';
+import { Type } from 'class-transformer';
 
 export class CreateEquipmentDto {
   @IsString({ message: 'inventoryNumber: должно быть строкой' })
@@ -12,17 +13,19 @@ export class CreateEquipmentDto {
   @IsString({ message: 'equipmentTypeCode: должно быть строкой' })
   @IsNotEmpty({ message: 'equipmentTypeCode: обязательное поле' })
   equipmentTypeCode!: string;
-  @IsString({ message: 'status: должно быть строкой' })
+  @IsIn(['Active', 'Repair', 'Reserve', 'WriteOff'], { message: 'status: недопустимое значение' })
   @IsNotEmpty({ message: 'status: обязательное поле' })
   status!: string;
   @IsString({ message: 'location: должно быть строкой' })
   location?: string;
   @IsISO8601({}, { message: 'commissionedAt: должно содержать корректную дату' })
   commissionedAt?: string;
-  @IsNumberString({}, { message: 'totalEngineHours: должно быть числом' })
+  @Type(() => Number)
-  totalEngineHours?: string;
+  @IsNumber({ allowNaN: false, allowInfinity: false }, { message: 'totalEngineHours: должно быть числом' })
-  @IsNumberString({}, { message: 'engineHoursSinceLastRepair: должно быть числом' })
+  totalEngineHours?: number;
-  engineHoursSinceLastRepair?: string;
+  @Type(() => Number)
+  @IsNumber({ allowNaN: false, allowInfinity: false }, { message: 'engineHoursSinceLastRepair: должно быть числом' })
+  engineHoursSinceLastRepair?: number;
   @IsISO8601({}, { message: 'lastRepairAt: должно содержать корректную дату' })
   lastRepairAt?: string;
   @IsString({ message: 'notes: должно быть строкой' })

server/src/modules/equipment/dto/update-equipment.dto.ts

@@ -1,4 +1,5 @@
-import { IsISO8601, IsNumberString, IsOptional, IsString, IsUUID } from 'class-validator';
+import { IsISO8601, IsIn, IsNumber, IsOptional, IsString, IsUUID } from 'class-validator';
+import { Type } from 'class-transformer';
 
 export class UpdateEquipmentDto {
   @IsOptional()
@@ -17,7 +18,7 @@ export class UpdateEquipmentDto {
   @IsString({ message: 'equipmentTypeCode: должно быть строкой' })
   equipmentTypeCode?: string;
   @IsOptional()
-  @IsString({ message: 'status: должно быть строкой' })
+  @IsIn(['Active', 'Repair', 'Reserve', 'WriteOff'], { message: 'status: недопустимое значение' })
   status?: string;
   @IsOptional()
   @IsString({ message: 'location: должно быть строкой' })
@@ -26,11 +27,13 @@ export class UpdateEquipmentDto {
   @IsISO8601({}, { message: 'commissionedAt: должно содержать корректную дату' })
   commissionedAt?: string;
   @IsOptional()
-  @IsNumberString({}, { message: 'totalEngineHours: должно быть числом' })
+  @Type(() => Number)
-  totalEngineHours?: string;
+  @IsNumber({ allowNaN: false, allowInfinity: false }, { message: 'totalEngineHours: должно быть числом' })
+  totalEngineHours?: number;
   @IsOptional()
-  @IsNumberString({}, { message: 'engineHoursSinceLastRepair: должно быть числом' })
+  @Type(() => Number)
-  engineHoursSinceLastRepair?: string;
+  @IsNumber({ allowNaN: false, allowInfinity: false }, { message: 'engineHoursSinceLastRepair: должно быть числом' })
+  engineHoursSinceLastRepair?: number;
   @IsOptional()
   @IsISO8601({}, { message: 'lastRepairAt: должно содержать корректную дату' })
   lastRepairAt?: string;

server/src/modules/repair-order/dto/create-repair-order.dto.ts

@@ -1,4 +1,5 @@
-import { IsISO8601, IsNotEmpty, IsNumberString, IsString, IsUUID } from 'class-validator';
+import { IsISO8601, IsIn, IsNotEmpty, IsNumber, IsString, IsUUID } from 'class-validator';
+import { Type } from 'class-transformer';
 
 export class CreateRepairOrderDto {
   @IsString({ message: 'number: должно быть строкой' })
@@ -7,10 +8,10 @@ export class CreateRepairOrderDto {
   @IsUUID(undefined, { message: 'equipmentId: должно быть UUID' })
   @IsNotEmpty({ message: 'equipmentId: обязательное поле' })
   equipmentId!: string;
-  @IsString({ message: 'repairKind: должно быть строкой' })
+  @IsIn(['TO', 'TR', 'TRE', 'KR', 'AR', 'MP'], { message: 'repairKind: недопустимое значение' })
   @IsNotEmpty({ message: 'repairKind: обязательное поле' })
   repairKind!: string;
-  @IsString({ message: 'status: должно быть строкой' })
+  @IsIn(['Draft', 'Approved', 'InWork', 'Done', 'Cancelled'], { message: 'status: недопустимое значение' })
   @IsNotEmpty({ message: 'status: обязательное поле' })
   status!: string;
   @IsISO8601({}, { message: 'plannedAt: должно содержать корректную дату' })
@@ -22,8 +23,9 @@ export class CreateRepairOrderDto {
   completedAt?: string;
   @IsString({ message: 'contractor: должно быть строкой' })
   contractor?: string;
-  @IsNumberString({}, { message: 'engineHoursAtRepair: должно быть числом' })
+  @Type(() => Number)
-  engineHoursAtRepair?: string;
+  @IsNumber({ allowNaN: false, allowInfinity: false }, { message: 'engineHoursAtRepair: должно быть числом' })
+  engineHoursAtRepair?: number;
   @IsString({ message: 'description: должно быть строкой' })
   description?: string;
   @IsString({ message: 'notes: должно быть строкой' })

server/src/modules/repair-order/dto/update-repair-order.dto.ts

@@ -1,4 +1,5 @@
-import { IsISO8601, IsNumberString, IsOptional, IsString, IsUUID } from 'class-validator';
+import { IsISO8601, IsIn, IsNumber, IsOptional, IsString, IsUUID } from 'class-validator';
+import { Type } from 'class-transformer';
 
 export class UpdateRepairOrderDto {
   @IsOptional()
@@ -11,10 +12,10 @@ export class UpdateRepairOrderDto {
   @IsUUID(undefined, { message: 'equipmentId: должно быть UUID' })
   equipmentId?: string;
   @IsOptional()
-  @IsString({ message: 'repairKind: должно быть строкой' })
+  @IsIn(['TO', 'TR', 'TRE', 'KR', 'AR', 'MP'], { message: 'repairKind: недопустимое значение' })
   repairKind?: string;
   @IsOptional()
-  @IsString({ message: 'status: должно быть строкой' })
+  @IsIn(['Draft', 'Approved', 'InWork', 'Done', 'Cancelled'], { message: 'status: недопустимое значение' })
   status?: string;
   @IsOptional()
   @IsISO8601({}, { message: 'plannedAt: должно содержать корректную дату' })
@@ -29,8 +30,9 @@ export class UpdateRepairOrderDto {
   @IsString({ message: 'contractor: должно быть строкой' })
   contractor?: string;
   @IsOptional()
-  @IsNumberString({}, { message: 'engineHoursAtRepair: должно быть числом' })
+  @Type(() => Number)
-  engineHoursAtRepair?: string;
+  @IsNumber({ allowNaN: false, allowInfinity: false }, { message: 'engineHoursAtRepair: должно быть числом' })
+  engineHoursAtRepair?: number;
   @IsOptional()
   @IsString({ message: 'description: должно быть строкой' })
   description?: string;

tools/validate-generation.mjs

@@ -135,6 +135,10 @@ function validateBuildChecks() {
     'prompts/frontend-rules.md',
     'prompts/runtime-rules.md',
     'prompts/validation-rules.md',
+    'generation/templates/runtime/main.ts',
+    'generation/templates/runtime/api-exception.filter.ts',
+    'generation/templates/runtime/dataProvider.ts',
+    'generation/templates/runtime/AppNotification.tsx',
   ]);
 
   const dslFiles = getDslFiles(rootDir).map((filePath) => path.relative(rootDir, filePath).replaceAll('\\', '/'));
@@ -240,6 +244,38 @@ function validateAuthChecks() {
   assertCondition(/protocol\/openid-connect\/certs/.test(authService), 'Backend auth must keep Keycloak certs fallback resolution');
 }
 
+function validateApiErrorContractChecks() {
+  requireFiles([
+    'server/src/common/field-labels.generated.ts',
+    'server/src/common/filters/api-exception.filter.ts',
+  ]);
+  requireContent(
+    'server/src/main.ts',
+    /field-labels\.generated/,
+    'main.ts must import DSL-generated FIELD_LABELS',
+  );
+  requireContent(
+    'server/src/common/filters/api-exception.filter.ts',
+    /message:\s*string\s*\|\s*string\[\]/,
+    'Error JSON must allow message: string | string[]',
+  );
+  requireContent(
+    'server/src/common/filters/api-exception.filter.ts',
+    /Внутренняя ошибка сервера/,
+    'Unexpected server errors must use a generic user-facing message',
+  );
+  requireContent(
+    'client/src/dataProvider.ts',
+    /ApiErrorBody/,
+    'dataProvider must document API error payload shape (ApiErrorBody)',
+  );
+  const dataProviderSource = read('client/src/dataProvider.ts');
+  assertCondition(
+    !dataProviderSource.includes(".split(', ')"),
+    'dataProvider must not split API error strings on comma+space (breaks messages that contain commas)',
+  );
+}
+
 function validateNaturalKeyChecks() {
   const summary = parseJson('domain-summary.json');
   if (!summary) {
@@ -484,6 +520,7 @@ function validateRuntimeExecutionChecks() {
 
 validateBuildChecks();
 validateAuthChecks();
+validateApiErrorContractChecks();
 validateNaturalKeyChecks();
 validateRealmChecks();
 validateRuntimeContractChecks();