Use immediately when user mentions: "DTO", "スキーマ", "schema", "データモデル", "data model", "Pydantic", "validation", "バリデーション", "型定義", "type definition", "data structure", "レコード", "record". MUST USE this skill for: - Designing Pydantic DTOs with field validation - Creating type-safe data structures - Implementing validators and model configurations - Any work in src/schemas/ directory
Implement comprehensive validation with server-side validation for security, client-side validation for user experience, early validation to fail fast, specific field-level error messages, allowlists over blocklists, type and format validation, input sanitization to prevent injection attacks, business rule validation, and consistent validation across all entry points. Use this skill when implementing form validation, API request validation, input sanitization, validation rules in Laravel, validation error messages, type checking, or security-related input validation. This skill applies when working on any code that accepts user input including forms, API endpoints, command-line interfaces, or background jobs.
This skill should be used when designing APIs, choosing between REST, GraphQL, or gRPC, implementing API protocols, or ensuring API security. It provides guidance on RESTful APIs, GraphQL, gRPC, HTTP/WebSockets, and API best practices.
Check that API response format matches Android/iOS model expectations. Use when fixing JSON parsing errors, serialization issues, or when API returns unexpected format. Checks for array vs object wrappers, required fields, snake_case vs camelCase mismatches.
Guide for creating Fastify route handlers with TypeBox schemas and OpenAPI documentation. Use when adding new routes to app/src/routes/.
API design principles and decision-making. REST vs GraphQL vs tRPC selection, response formats, versioning, pagination.
Design and implement RESTful API endpoints following best practices for routing, versioning, and HTTP standards. Use this skill when creating or modifying API routes, controllers, or endpoints in files like routes/api.php, API controller files in app/Http/Controllers/Api/, controller files in app/Http/Controllers/, API resource classes, or when implementing REST API functionality. Use when working on URL structures, HTTP method handling (GET, POST, PUT, PATCH, DELETE), API versioning strategies, query parameter handling for filtering/sorting/pagination, HTTP status code responses, rate limiting configuration, or any API endpoint design decisions.
Configure PrismaClient for serverless (Next.js, Lambda, Vercel) with connection_limit=1 and global singleton pattern.
This is the guideline to follow when implementing CRUD features. Use them when implementing CRUD functionality.
API protocol guide for Sunrei project. Use when writing API endpoints, request/response type naming, and HTTP method conventions.
Validate data with JSON Schema and AJV. Use when validating API requests, form submissions, database inputs, or any data boundaries. Provides deterministic validation with consistent error formats.
API endpoint design and testing for vehicle insurance data platform. Use when designing new API endpoints, testing existing ones, validating response formats, or debugging API issues. Covers 11 core endpoints including 3 new pie chart distribution endpoints, parameter validation, error handling, and integration patterns.
Use this skill when designing, implementing, or reviewing RESTful APIs and URL structures.
OpenAPI 3.1 specification patterns. Use when defining API schemas, operations, or documentation. Triggers: openapi.go, OpenAPI, Spec.*, openapi.Operation, openapi.Schema, openapi.Response, RequestBodyJSON, ResponseJSON, ResponseRef, SchemaRef, Schemas(), /docs endpoint, Scalar UI. File patterns: internal/*/openapi.go, pkg/openapi/*.go, cmd/server/openapi.go
inkLine backend API development guidelines using Hono framework and Drizzle ORM
Design and implement RESTful API endpoints following best practices for URL structure, HTTP methods, status codes, versioning, and rate limiting. Use this skill when creating or modifying API routes, controllers, endpoint handlers, or route files. When working on files like routes.ts, api/*.ts, controllers/*.ts, endpoints/*.py, views.py, or any server-side request handlers. When designing resource URLs, implementing CRUD operations, adding query parameters for filtering/sorting/pagination, or setting up API versioning. When reviewing or refactoring existing API code for REST compliance.
Debug Django REST Framework API issues including serializers, viewsets, permissions, pagination, filtering, and response formatting. Use when troubleshooting API endpoints, serialization errors, permission denials, or unexpected response data.
Design and implement RESTful API endpoints following REST principles with proper HTTP methods, status codes, and resource-based URL patterns. Use this skill when creating or modifying API route handlers, controllers, or endpoint definitions in backend frameworks (Express, NestJS, FastAPI, Django REST Framework, etc.). Use when working with API versioning strategies, implementing rate limiting, designing nested resource endpoints, or defining query parameter filtering and pagination. Use when writing files like routes.ts, controllers.ts, api.py, views.py, or any backend files that define HTTP endpoints and handle API requests/responses.
Write type-safe transformations with Zod including string methods, custom transforms, codecs, and pipelines
