openapi-to-application-code

This skill directs the assistant to generate a complete, working application from an OpenAPI specification, following the conventions and best practices of the active framework. It addresses the tedious, error-prone task of hand-translating an API contract into scaffolding, models, and handlers by producing a structured, layered codebase directly from the spec. The specification can be supplied as a URL, a local file path, or pasted content, with optional project details like name, target framework, naming conventions, and authentication method.

The generation process is broken into clear steps. First it analyzes the spec, validating completeness, identifying endpoints and schemas, extracting security schemes, and flagging ambiguities. It then designs the architecture, planning directory structure, controller grouping, a service layer, data models, and configuration strategy. Next it generates the code: project structure and build files, models/DTOs, controllers/handlers with route mappings, a service layer, an optional repository layer, plus error handling, validation, and logging. Finally it adds supporting files including unit tests, a README, .gitignore, environment templates, API documentation, and example requests. A sample output tree shows a conventional controllers/services/models/repositories layout with test folders, and the skill lists clarifying questions to ask about database setup, Docker, authentication method, and testing scope.

The target users are backend and full-stack developers who work API-first and want to bootstrap an implementation from an existing OpenAPI contract. It applies across frameworks and languages, emphasizing separation of concerns, validation, logging, and tests. It is a single-document guidance skill that shapes generated output rather than a standalone code generator that runs on its own.