Generates Helidon 4 SE and MP application code following Java 21 best practices.
npx skills add https://github.com/github/awesome-copilot --skill java-helidon
Please help me install this Agent Skill. Skill: java-helidon Source: https://github.com/github/awesome-copilot/tree/main/skills/java-helidon Command: npx skills add https://github.com/github/awesome-copilot --skill java-helidon
Helidon 4 renamed and resignatured many APIs from Helidon 3, so AI-generated code often fails to compile. This Skill provides verified best practices and correct API usage for building Helidon SE and Helidon MP applications on Java 21+.
Ask the AI to create a Helidon 4 SE REST service with an HttpService, a service layer, and a Helidon DB Client repository for a customer resource.
High-intent search queries and answers about installing and using this skill.
Replace io.helidon.common.http.Http.Status with io.helidon.http.Status, Service with HttpService, Routing.Rules with HttpRules, and javax.* imports with jakarta.*. Also replace reactive Single/Multi chains with blocking code, since Helidon 4 uses virtual threads.
Helidon SE uses explicit constructor-based composition and programmatic HttpService routing with virtual threads. Helidon MP uses CDI dependency injection, Jakarta REST annotations, and MicroProfile APIs. Do not mix the two models in one application.
In Helidon 4, Value.as(Class) returns OptionalValue<T>, not T, which is the most common compile error in generated code. Use column.getString() or column.get(String.class) for typed values, and asOptional() for nullable columns.
For Helidon SE, use helidon-webserver-testing-junit5 with @ServerTest or @RoutingTest, which starts the server on a dynamic port. For Helidon MP, use helidon-microprofile-testing-junit5 with @HelidonTest to start the CDI container.
No. Helidon 4 is not reactive and uses virtual-thread-based request handling. Write straightforward blocking code instead of Single, Multi, or CompletionStage chains unless there is a specific reason otherwise.
edercnjScaffold Helidon SE/MP service modules with entrypoints, resources, and tests.
accolverConfigures health checks, Prometheus metrics, OpenTelemetry tracing, and SLO alerts for services.
williamzujkowskiGenerate Python integration tests for APIs and databases using Docker Compose.
nazrulsoftwaredevStandardize Java 17+ development practices for Spring Boot and Quarkus services.
