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Java 21 and Spring Boot: modern code and layers v1.0.0

Use this resource to write maintainable Java 21 and Spring Boot code

New

  • 332 downloads
  • 104 likes
  • 130 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install java-spring-modern

With no option, the skill goes to ~/.agents/skills/; add --agent claude-code (or codex, cursor…) to target an agent.

First time: connect the CLI with

npx --yes palatekit@latest login

The agent writes or reviews Java 21 code: records for DTOs, sealed interfaces, the Stream API, dependency injection, validation and exception handling, with repository and service layers. It also gives advice on Maven and Gradle. You get shorter, safer code.

Mostly picked by

Updated November 2, 2026

Card for the “Java 21 and Spring Boot: modern code and layers” skill

Details

Works in
Install guides
Generates with
Your agent's model
Licence
Apache-2.0

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What you get

  • SKILL.md: modern Java practices, dependency injection and error handling
  • references/CORE_CONCEPTS.md: Java, Spring Boot and repository and service pattern concepts

Good fit for

  • You are taking over an old Spring Boot service and want to modernise it
  • You are building a Java API and want clearly separated layers

Not for

    Tags

    • java
    • spring-boot
    • records
    • maven

    About

    You say

    “Refactor this Spring Boot service to use records as DTOs and validate the inputs.”

    Card for the “Java 21 and Spring Boot: modern code and layers” skill

    Skill published by PCL Team under the Apache-2.0 license, delivered in its original version.

    Show more

    How to use it

    1. Install the skill in your agent's skills folder
    2. Ask your agent to write maintainable Java 21 and Spring Boot code
    3. Review and adjust the result

    Content preview

    Files

    • LICENSE10.9 KB
    • NOTICE-PALATEKIT.md0.5 KB
    • references/CORE_CONCEPTS.md14.4 KB
    • SKILL.md9 KB

    Origin and licence

    Listed unmodified

    Author
    PCL Team
    Source
    github.com/personamanagmentlayer/pcl/tree/79ccaa9820486121fa33aaa696ec16fa1607bf02/stdlib/languages/java-expert
    Licence
    Apache-2.0

    Notice

    « java-expert » (PCL Team, Apache-2.0) livré dans sa version d'origine : fiche en français et en anglais par PalateKit.

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