---

name: API Development description: Автоматизация создания REST API endpoints для проекта Family Budget version: 3.0.0 author: Family Budget Team tags: [api, fastapi, rest, crud, scd-type-2, shared-budget] dependencies: [db-management] architecture_refs:

• $ref: ../../docs/architecture/database/dimensions.yaml
• $ref: ../../docs/architecture/database/facts.yaml
• $ref: ../../docs/architecture/endpoints/articles.yaml
• $ref: ../../docs/architecture/endpoints/facts.yaml
• $ref: ../../docs/architecture/functionality/budget-management.yaml
• $ref: ../../docs/architecture/guides/change-checklist.yaml#/checklists/add_endpoint

---

API Development Skill

Автоматизация создания REST API endpoints с поддержкой SCD Type 2, Shared Family Budget и JWT аутентификации.

When to Use

• Создать новый REST API endpoint (CRUD)
• Добавить Pydantic схемы для валидации
• Интегрировать с Shared Family Budget моделью
• Генерировать базовые тесты для endpoint

Автоматически активируется при:

• "Создай API endpoint для модели X"
• "Добавь CRUD операции для Y"
• "Сделай REST API для управления Z"

Architecture Context

References:

• Database: $ref, $ref
• Endpoints: $ref
• Guides: $ref

Key Patterns:

Shared Family Budget (CRITICAL!)

Fact tables: NO user_id filtering - все видят всё Dimension tables: Admin-only CREATE/UPDATE/DELETE, все читают

Reference: _shared/validation-logic.md#3-shared-budget-model-consistency

SCD Type 2 для Dimensions

Использовать SCD2Service.create_new_version() для обновлений

Reference: _shared/validation-logic.md#5-scd-type-2-update-pattern

Commands

Command: create-endpoint

Usage:

Создай новый REST API endpoint для модели <ModelName> с операциями <operations>.
Тип таблицы: <dimension|fact>.

What It Does:

1. Создает endpoint файл в backend/app/api/v1/endpoints/{model_name}.py
2. Создает Pydantic схемы в backend/app/schemas/{model_name}.py
3. Регистрирует router в backend/app/api/v1/router.py
4. Создает базовые unit/integration тесты

Template Reference:

• Dimension table: templates/endpoint-dimension.py
• Fact table: templates/endpoint-fact.py
• Schemas: templates/schema.py

Example Reference:

• Real Article endpoint: examples/article-endpoint.md
• Real BudgetFact endpoint: examples/fact-endpoint.md

Generated Files:

backend/app/api/v1/endpoints/{model_name}.py  # Endpoint
backend/app/schemas/{model_name}.py           # Schemas
tests/unit/test_{model_name}.py               # Unit tests
tests/integration/test_{model_name}_api.py    # Integration tests

Command: create-schemas

Usage:

Создай Pydantic схемы для модели <ModelName>.

What It Does: Создает схемы Create/Update/Response для модели

Template Reference:

• templates/schema.py - Complete schema template

Validation Checklist

• Fact tables: NO user_id filtering (Shared Budget)
• Dimension tables: Admin-only CREATE/UPDATE/DELETE
• All async methods have await
• HTTPException used correctly (401/403/404/422)
• SCD Type 2 для dimension updates (SCD2Service.create_new_version())
• Dependencies used: CurrentUser, get_session
• Router registered in backend/app/api/v1/router.py
• Schemas created (Create/Update/Response)
• Tests created (unit + integration)
• Architecture docs updated (docs/architecture/endpoints/*.yaml)

Common Mistakes

Filtering fact tables by user_id:

• Symptom: Users can't see each other's transactions
• Fix: Remove .where(BudgetFact.user_id == current_user.id)
• Reference: _shared/validation-logic.md#3

Direct UPDATE on dimension table:

• Symptom: SCD Type 2 versioning broken, no history
• Fix: Use SCD2Service.create_new_version()
• Reference: _shared/validation-logic.md#5

Missing await on async methods:

• Symptom: RuntimeWarning, database not updated
• Fix: Add await before ALL AsyncSession methods
• Reference: _shared/validation-logic.md#1

Related Skills

• db-management: Create models and migrations first
• authentication-security: Add JWT protection if needed
• testing: Create comprehensive test coverage
• advanced-patterns: Implement SCD Type 2, Shared Budget patterns

Quick Links

• Change Checklist: $ref
• Endpoint Examples: $ref
• API Documentation: docs/api/API_DOCUMENTATION.md