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Best agent skills for Java

We found 300 agent skills for Java in the catalog; these are the 15 that rank highest. The order comes from our rank, which weighs adoption, freshness, documentation and publisher identity. Nobody can pay for a place on this list. java-affected-tests, java-checkstyle and doca-flow-grpc-server lead it. kafka-streams-programming, flink-udf and migrate-to-rust are published by the company that makes them. migrate-to-rust comes from the largest repository here (21,542 stars). 11 of the 15 had activity in the last 30 days. Each entry lists why it made the list and links to its install page.

Updated Oct 26, 2026 · Built from catalog data; how we rank and grade

Top 15 of 300

  1. 1
    java-affected-tests

    open-metadata

    Use before opening or updating an OpenMetadata PR that changes Java, a JSON schema, an index mapping, a SQL migration, seed data or a pom — PR CI no longer…

    • Repository has 15.6K stars
    • Active in the last 30 days
    • Open source (Apache-2.0)

    ★ 15.6KLast active Oct 21, 2026Claude Code, Claude apps, Codex, Cursor +6

  2. 2
    java-checkstyle

    open-metadata

    Run `mvn spotless:apply` to fix Java checkstyle / formatting failures and verify the result.

    • Repository has 15.6K stars
    • Active in the last 30 days
    • Open source (Apache-2.0)

    ★ 15.6KLast active Oct 21, 2026Claude Code, Claude apps, Codex, Cursor +6

  3. 3
    doca-flow-grpc-server

    NVIDIA <doca@nvidia.com>

    Remote control of DOCA Flow over gRPC with the shipped `doca_flow_grpc` server: program Flow pipes and entries from Python, Go, Rust or Java, or from another…

    • Repository has 3.7K stars
    • Active in the last 30 days
    • Open source (Apache-2.0)

    ★ 3.7KLast active Oct 22, 2026Claude Code, Claude apps, Codex, Cursor +6

  4. 4
    otel-java

    ollygarden

    OpenTelemetry in Java — Javaagent zero-code instrumentation, Spring Boot Starter, manual autoconfigure SDK, declarative YAML configuration, BOM dependency…

    • Active in the last 30 days
    • Open source (Apache-2.0)

    ★ 116Last active Oct 15, 2026Claude Code, Claude apps, Codex, Cursor +6

  5. 5
    hunt-deserialization

    Encod3d-Sec

    Insecure deserialization hunting across Java / .NET / PHP / Python / Ruby / Node.

    • Open source (MIT)

    ★ 335Last active Jul 27, 2026Claude Code, Claude apps, Codex, Cursor +6

  6. 6
    xslt-injection

    langbyyi

    XSLT injection testing: processor fingerprinting, XXE and document() SSRF, EXSLT write primitives, PHP/Java/.NET extension RCE surfaces.

    • Active in the last 30 days
    • Open source (Apache-2.0)

    ★ 131Last active Oct 16, 2026Claude Code, Claude apps, Codex, Cursor +6

  7. 7
    kafka-streams-programming

    confluentincOfficial

    Architect, build, and debug Kafka Streams apps (JVM-embedded stream processing).

    • Published by the vendor
    • Open source (Apache-2.0)
    • Ships helper scripts

    ★ 59Last active Sep 24, 2026Claude Code, Claude apps, Codex, Cursor +6

  8. 8
    flink-udf

    confluentincOfficial

    Build and deploy Apache Flink user-defined functions (UDFs) in Java for stream processing over Kafka.

    • Published by the vendor
    • Open source (Apache-2.0)

    ★ 59Last active Sep 24, 2026Claude Code, Claude apps, Codex, Cursor +6

  9. 9
    add-javadoc

    OpenHands

    Add comprehensive JavaDoc documentation to Java classes and methods.

    • Active in the last 30 days
    • Open source (MIT)

    ★ 173Last active Oct 23, 2026Claude Code, Claude apps, Codex, Cursor +6

  10. 10
    build-setup

    OpenHands

    Set up build environment and test fixtures for COBOL-to-Java migrations.

    • Active in the last 30 days
    • Open source (MIT)
    • Ships helper scripts

    ★ 173Last active Oct 23, 2026Claude Code, Claude apps, Codex, Cursor +6

  11. 11
    spring-exploitation

    langbyyi

    Spring Framework漏洞深度利用专业技能：全年代CVE时间线（2016-2026）、Spring Boot Actuator深度利用与heapdump凭据链、SpEL注入全家族、Spring4Shell数据绑定RCE、Spring…

    • Active in the last 30 days
    • Open source (Apache-2.0)

    ★ 131Last active Oct 16, 2026Claude Code, Claude apps, Codex, Cursor +6

  12. 12
    dep-auditor

    laolaoshiren

    审计 Node.js、Python、Go、Rust、JVM、Ruby 项目的依赖漏洞、版本健康度与许可证事实；当用户要求检查 package.json、lockfile、requirements、go.mod、Cargo.toml、pom.xml、Gemfile.lock，或生成不改依赖的中文审计报告时使用

    • Open source (MIT)

    ★ 893Last active Jul 18, 2026Claude Code, Claude apps, Codex, Cursor +6

  13. 13
    migrate-to-rust

    googleOfficial

    Clones, analyzes, plans, and migrates legacy codebases (C++, Fortran, Java, Python, C, Shell) from a GitHub URL or local directory to a modern…

    • Published by the vendor
    • Largest repository here (21,542 stars)
    • Active in the last 30 days

    ★ 21.5KLast active Oct 13, 2026Claude Code, Claude apps, Codex, Cursor +6

  14. 14
    java-architect

    https://github.com/Jeffallan

    Use when building, configuring, or debugging enterprise Java applications with Spring Boot 3.x, microservices, or reactive programming.

    • Repository has 12K stars
    • Active in the last 30 days
    • Open source (MIT)

    ★ 12KLast active Oct 16, 2026Claude Code, Claude apps, Codex, Cursor +6

  15. 15
    spring-boot-engineer

    https://github.com/Jeffallan

    Generates Spring Boot 3.x configurations, creates REST controllers, implements Spring Security 6 authentication flows, sets up Spring Data JPA repositories…

    • Repository has 12K stars
    • Active in the last 30 days
    • Open source (MIT)

    ★ 12KLast active Oct 16, 2026Claude Code, Claude apps, Codex, Cursor +6

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