# Jvm

> Use for JVM build, packaging, testing, and failure triage — Gradle 8.10+ with Kotlin DSL, libs.versions.toml version catalogs, java/kotlin toolchains, convention plugins (buildSrc / build-logic), configuration cache + parallel builds; publishing libraries to Maven Central via maven-publish + nmcp + JReleaser, signing with useInMemoryPgpKeys, JPMS module-info, GitHub Actions release-on-tag; testing with JUnit 5 (Jupiter), AssertJ, kotest (Kotlin), mockk / mockito, Testcontainers, JaCoCo, awaitility; diagnosing Kotlin/Spring failures from stack traces and logs (root cause vs wrapper exceptions, startup failures, noisy nested traces). Read the matching reference before acting.

- Skill: `jylhis/jvm` (Agent Skill, multi-file: 5 files)
- Install (CLI): `npx skillmds@latest add jylhis/jvm`
- Raw SKILL.md: https://api.skillmd.com/api/skills/jylhis/jvm/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: Jylhis (https://skillmd.com/u/jylhis)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/jylhis/jvm

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# JVM build / packaging / testing skill index

Pick the topic and read its reference before writing or reviewing
JVM build files or tests.

| Topic | When to read | Reference |
|---|---|---|
| Gradle build | build.gradle.kts, libs.versions.toml, java/kotlin toolchains, allWarningsAsErrors, convention plugins, configuration-cache, build-cache, dependencyInsight | `references/build-gradle.md` |
| Maven Central publishing | maven-publish, com.gradleup.nmcp, JReleaser, signing (useInMemoryPgpKeys + env vars), withSourcesJar/withJavadocJar, POM metadata, JPMS module-info, semver release tagging, GitHub Actions release-on-tag | `references/packaging.md` |
| Testing | JUnit 5 (Jupiter) for Java (@Nested, @ParameterizedTest, @CsvSource), AssertJ, kotest for Kotlin (StringSpec / FunSpec / etc.), mockk / mockito, Testcontainers, JaCoCo, useJUnitPlatform(), awaitility, migrating from PowerMock | `references/testing.md` |
| Stacktrace / log triage | diagnosing Kotlin + Spring failures from stack traces, startup logs, runtime logs, metric anomalies; separating root cause from wrapper exceptions; quick mitigation vs long-term fix | `references/stacktrace-log-triage.md` |

For JVM **security** topics, use `security`.

After reading the reference, follow its guidance for the task.