OpenAPI Specification 2.0 (formerly Swagger 2.0) defines a JSON/YAML format for describing RESTful APIs: paths, operations, parameters, responses, schemas, and security. Use this skill when creating or editing Swagger 2.0 specs, validating structure, or generating code/documentation from them.
The skill is based on OpenAPI Specification 2.0, generated at 2026-01-30.
Core References
| Topic | Description | Reference |
|---|
| Format and Structure | Document format, file structure, data types | core-format-and-structure |
| Fixed and Patterned Fields | Fixed vs patterned field names in the schema | core-fixed-patterned-fields |
| Swagger Object | Root document, required/optional fields, extensions | core-swagger-object |
| Info and Metadata | Info, Contact, License objects | core-info-metadata |
| Tags and External Docs | Tag Object, External Documentation Object | core-tags-and-external-docs |
| Reference Object | $ref, JSON Pointer, same-document and external file references | core-reference-object |
| Data Types and Formats | Primitives, format table, validation, file type | core-data-types-and-formats |
| MIME Types | consumes/produces, RFC 6838, examples | core-mime-types |
| HTTP Status Codes | Response keys, default response, IANA/RFC 7231 | core-http-status-codes |
| Path Templating | Curly braces, path parameters, name matching | core-path-templating |
| Header Object | Response header definition (type, format, items, validation) | core-header-object |
| Headers Object | Container for response headers (name → Header Object) | core-headers-object |
| Items Object | Non-body array items (parameters, headers) | core-items-object |
| Example Object | Response examples by MIME type | core-example-object |
Paths and Operations
| Topic | Description | Reference |
|---|
| Paths and Operations | Paths Object, Path Item, Operation Object | paths-and-operations |
| Path Item $ref | External path definition, conflict behavior | path-item-ref |
Parameters and Responses
| Topic | Description | Reference |
|---|
| Parameters | Parameter locations (path, query, header, body, formData) | parameters |
| collectionFormat | csv, ssv, tsv, pipes, multi and where they apply | parameters-collection-format |
| Parameters Definitions (Reuse) | Root-level parameters, reuse via $ref | parameters-definitions-reuse |
| Responses | Responses Object, Response Object | responses |
| Responses Definitions (Reuse) | Root-level responses, reuse via $ref | responses-definitions-reuse |
Schemas and Definitions
Security
Best Practices
Advanced