Use when converting API contracts to OpenAPI 3.1 specification or generating SDK clients.
This skill guides the creation of OpenAPI 3.1 specifications from the API contracts defined in Phase 3, enabling SDK generation and interactive documentation.
See references/openapi-template.yaml for the complete OpenAPI 3.1 specification template. The template includes info block with metadata and rate limits, multiple server environments, tagged endpoints with operationIds, reusable parameters and schemas in components section, security schemes (Bearer JWT), request/response schemas, and standardized error responses.
From api-contracts.md:
### GET /users
**Response 200:**
```json
{ "data": [...], "meta": {...} }
To OpenAPI:
```yaml