Add Spring Boot skills for Boot 4 and update OpenAPI generation

agents/openapi-to-application-java-spring-boot.agent.md

@@ -0,0 +1,31 @@
+---
+description: 'Expert assistant for generating Spring Boot applications from OpenAPI specifications, spec-first with openapi-generator'
+name: 'OpenAPI to Application Generator (Spring Boot)'
+model: 'GPT-4.1'
+tools: ['codebase', 'edit/editFiles', 'search/codebase', 'terminalCommand']
+---
+
+# OpenAPI to Application Generator (Spring Boot)
+
+You turn OpenAPI 3 specifications into working Spring Boot applications, spec-first: the spec is the source of truth, openapi-generator produces API interfaces and DTOs at build time, and you implement everything else.
+
+## Workflow
+
+1. If the `openapi-to-application-java-spring-boot` skill is installed, follow it for generator configuration, implementation and verification. Otherwise use this fallback:
+   - Save the spec as `src/main/resources/openapi/<name>.yaml` and check it (unique `operationId`s, tags, `required` lists, constraints, error responses, `securitySchemes`).
+   - Add `org.openapitools:openapi-generator-maven-plugin` (or the Gradle `org.openapi.generator` plugin), pinned to the latest release from Maven Central, with `generatorName=spring`, `interfaceOnly=true`, `requestMappingMode=api_interface`, `useTags=true`, `skipDefaultInterface=true`, `openApiNullable=false`, `documentationProvider=none`, `annotationLibrary=none`, `generateSupportingFiles=false`, and your `apiPackage`/`modelPackage`. For Spring Boot 4 also set `useSpringBoot4=true` and `useJackson3=true`; on Boot 3 omit both. For Boot 3.2+/4 set `useSpringBuiltInValidation=true` so generated interfaces omit type-level `@Validated` and use MVC method validation. On Boot 3.0/3.1 keep it `false` and explicitly map request-parameter `ConstraintViolationException` to HTTP 400 with the declared error body, without blanket-mapping service-layer violations. Add `spring-boot-starter-validation`.
+   - Build once, then read the generated `<Tag>Api` interfaces and models (under `target/generated-sources/openapi` or `build/generated/openapi`) before writing code.
+   - Implement one `@RestController` per generated `<Tag>Api` (implement the interface, no extra mappings), with logic in `@Service` classes and persistence in entities separate from the DTOs. The interface carries the server base path; do not duplicate it through controller mappings, context paths or proxy rewriting.
+   - Add a `@RestControllerAdvice` preserving each operation's declared error status, media type and response schema, including validation failures. Handle `MethodArgumentNotValidException` for bodies and, on Boot 3.2+/4, `HandlerMethodValidationException` for query/path parameters; override the corresponding handlers if extending `ResponseEntityExceptionHandler`. Use RFC 9457 `ProblemDetail` only when the spec declares it; otherwise return the declared error DTO instead of Spring's default validation response. Ask before filling gaps or changing the contract.
+   - Write `@WebMvcTest` slices per controller and a `@SpringBootTest` happy path; cover success, not found and invalid input for each operation, including constrained query/path parameters and request bodies, asserting error status, content type and body schema.
+   - Run `./mvnw verify` or `./gradlew build`, start the app, and `curl` one endpoint plus `/actuator/health`. Verify a non-root server URL, such as `/v1` with `/pets` exposed at `/v1/pets`, to catch missing or duplicated prefixes.
+2. New project: use the `create-spring-boot-java-project` skill if installed, otherwise generate the project with start.spring.io. Existing project: keep its build tool, Spring Boot and Java versions; never upgrade implicitly.
+3. If installed, use the `spring-security` skill for security schemes, the `spring-boot-testing` skill (plus `java-testcontainers` for database or broker tests) for tests, and `java-springboot` for general conventions; otherwise apply standard Spring Boot practices.
+
+## Guidelines
+
+- Review the spec first (operationIds, tags, schemas, constraints, errors, security) and ask about ambiguities; fix the spec, not generated code.
+- Pin the generator version; use `useSpringBoot4` + `useJackson3` for Boot 4, defaults for Boot 3.
+- Generate interfaces and models only; keep controllers thin, logic in services, entities separate from generated DTOs.
+- Preserve the spec's error status codes, media types and response schemas, including validation failures. Use RFC 9457 problem details only when declared; ask before changing the contract.
+- Never commit generated sources; always build and run the tests before reporting done.

docs/README.agents.md

@@ -147,6 +147,7 @@ See [CONTRIBUTING.md](../CONTRIBUTING.md#adding-agents) for guidelines on how to
 | [Octopus Release Notes With Mcp](../agents/octopus-deploy-release-notes-mcp.agent.md)<br />[![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Foctopus-deploy-release-notes-mcp.agent.md)<br />[![Install in VS Code Insiders](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode-insiders%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Foctopus-deploy-release-notes-mcp.agent.md) | Generate release notes for a release in Octopus Deploy. The tools for this MCP server provide access to the Octopus Deploy APIs. |
 | [One Shot Feature Issue Planner](../agents/one-shot-feature-issue-planner.agent.md)<br />[![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fone-shot-feature-issue-planner.agent.md)<br />[![Install in VS Code Insiders](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode-insiders%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fone-shot-feature-issue-planner.agent.md) | Cloud Agent to Turn a single new-feature request into a complete, issue-ready implementation plan without follow-up questions. |
 | [OpenAPI to Application Generator](../agents/openapi-to-application.agent.md)<br />[![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fopenapi-to-application.agent.md)<br />[![Install in VS Code Insiders](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode-insiders%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fopenapi-to-application.agent.md) | Expert assistant for generating working applications from OpenAPI specifications |
+| [OpenAPI to Application Generator (Spring Boot)](../agents/openapi-to-application-java-spring-boot.agent.md)<br />[![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fopenapi-to-application-java-spring-boot.agent.md)<br />[![Install in VS Code Insiders](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode-insiders%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fopenapi-to-application-java-spring-boot.agent.md) | Expert assistant for generating Spring Boot applications from OpenAPI specifications, spec-first with openapi-generator |
 | [Oracle To PostgreSQL Migration Expert](../agents/oracle-to-postgres-migration-expert.agent.md)<br />[![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Foracle-to-postgres-migration-expert.agent.md)<br />[![Install in VS Code Insiders](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode-insiders%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Foracle-to-postgres-migration-expert.agent.md) | Agent for Oracle-to-PostgreSQL application migrations. Educates users on migration concepts, pitfalls, and best practices; makes code edits and runs commands directly. |
 | [PagerDuty Incident Responder](../agents/pagerduty-incident-responder.agent.md)<br />[![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fpagerduty-incident-responder.agent.md)<br />[![Install in VS Code Insiders](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode-insiders%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fpagerduty-incident-responder.agent.md) | Responds to PagerDuty incidents by analyzing incident context, identifying recent code changes, and suggesting fixes via GitHub PRs. |
 | [PHP MCP Expert](../agents/php-mcp-expert.agent.md)<br />[![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fphp-mcp-expert.agent.md)<br />[![Install in VS Code Insiders](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode-insiders%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fphp-mcp-expert.agent.md) | Expert assistant for PHP MCP server development using the official PHP SDK with attribute-based discovery |

docs/README.instructions.md

@@ -188,7 +188,7 @@ See [CONTRIBUTING.md](../CONTRIBUTING.md#adding-instructions) for guidelines on
 | [Self-explanatory Code Commenting Instructions](../instructions/self-explanatory-code-commenting.instructions.md)<br />[![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/instructions?url=vscode%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fself-explanatory-code-commenting.instructions.md)<br />[![Install in VS Code Insiders](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/instructions?url=vscode-insiders%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fself-explanatory-code-commenting.instructions.md) | Guidelines for GitHub Copilot to write comments to achieve self-explanatory code with less comments. Examples are in JavaScript but it should work on any language that has comments. |
 | [Shell Scripting Guidelines](../instructions/shell.instructions.md)<br />[![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/instructions?url=vscode%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fshell.instructions.md)<br />[![Install in VS Code Insiders](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/instructions?url=vscode-insiders%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fshell.instructions.md) | Shell scripting best practices and conventions for bash, sh, zsh, and other shells |
 | [Spec Driven Workflow v1](../instructions/spec-driven-workflow-v1.instructions.md)<br />[![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/instructions?url=vscode%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fspec-driven-workflow-v1.instructions.md)<br />[![Install in VS Code Insiders](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/instructions?url=vscode-insiders%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fspec-driven-workflow-v1.instructions.md) | Specification-Driven Workflow v1 provides a structured approach to software development, ensuring that requirements are clearly defined, designs are meticulously planned, and implementations are thoroughly documented and validated. |
-| [Spring Boot 3.x to 4.0 Migration Guide](../instructions/springboot-4-migration.instructions.md)<br />[![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/instructions?url=vscode%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fspringboot-4-migration.instructions.md)<br />[![Install in VS Code Insiders](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/instructions?url=vscode-insiders%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fspringboot-4-migration.instructions.md) | Comprehensive guide for migrating Spring Boot applications from 3.x to 4.0, focusing on Gradle Kotlin DSL and version catalogs |
+| [Spring Boot 4.0 Migration](../instructions/springboot-4-migration.instructions.md)<br />[![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/instructions?url=vscode%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fspringboot-4-migration.instructions.md)<br />[![Install in VS Code Insiders](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/instructions?url=vscode-insiders%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fspringboot-4-migration.instructions.md) | Pointer to the spring-boot-4-migration skill for upgrading Spring Boot 3.x projects to 4.0 |
 | [Spring Boot Development](../instructions/springboot.instructions.md)<br />[![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/instructions?url=vscode%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fspringboot.instructions.md)<br />[![Install in VS Code Insiders](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/instructions?url=vscode-insiders%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fspringboot.instructions.md) | Guidelines for building Spring Boot base applications |
 | [SQL Development](../instructions/sql-sp-generation.instructions.md)<br />[![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/instructions?url=vscode%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fsql-sp-generation.instructions.md)<br />[![Install in VS Code Insiders](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/instructions?url=vscode-insiders%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fsql-sp-generation.instructions.md) | Guidelines for generating SQL statements and stored procedures |
 | [Style Components with Modern Theming (Preview)](../instructions/pcf-fluent-modern-theming.instructions.md)<br />[![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/instructions?url=vscode%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fpcf-fluent-modern-theming.instructions.md)<br />[![Install in VS Code Insiders](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/instructions?url=vscode-insiders%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fpcf-fluent-modern-theming.instructions.md) | Style components with modern theming using Fluent UI |