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LangChain4j tool and function calling v1.0.0

Use this resource to expose Java methods as function-calling tools for an AI agent

New

  • 570 downloads
  • 249 likes
  • 136 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install langchain4j-tool-calling-java

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 annotates Java methods with @Tool and @P, registers the tools in AiServices, validates parameters, tests the end-to-end call and handles execution errors. It also includes calculator and immediate-return tool examples.

Mostly picked by

Updated November 2, 2026

Card for the “LangChain4j tool and function calling” skill

Details

Works in
Install guides
Generates with
Your agent's model
Licence
MIT

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What you get

  • SKILL.md: five-step procedure, from annotations to errors and performance
  • references/core-patterns.md and error-handling.md: core patterns and error handling
  • references/examples.md: complete tool examples

Good fit for

  • Your agent must query a database or call a business API
  • A tool fails and the agent must handle the error cleanly

Not for

    Tags

    • langchain4j
    • function calling
    • tools
    • agents

    About

    You say

    “Expose a Java method to the agent that checks an order's status.”

    Card for the “LangChain4j tool and function calling” skill

    Skill published by giuseppe-trisciuoglio under the MIT 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 expose Java methods as function-calling tools for an AI agent
    3. Review and adjust the result

    Content preview

    Files

    • LICENSE1.1 KB
    • NOTICE-PALATEKIT.md0.6 KB
    • references/advanced-features.md2.4 KB
    • references/core-patterns.md2.2 KB
    • references/error-handling.md3 KB
    • references/examples.md16.5 KB
    • references/implementation-patterns.md14.6 KB
    • references/integration-examples.md5.3 KB
    • references/references.md9.6 KB
    • references/setup-configuration.md2.1 KB
    • SKILL.md9.5 KB

    Origin and licence

    Listed unmodified

    Author
    giuseppe-trisciuoglio
    Source
    github.com/giuseppe-trisciuoglio/developer-kit/tree/fe73fb33a09ee6562eeec7415a3f9a3bcf795177/plugins/developer-kit-java/skills/langchain4j-tool-function-calling-patterns
    Licence
    MIT

    Notice

    « langchain4j-tool-function-calling-patterns » (giuseppe-trisciuoglio, MIT) livré dans sa version d'origine : fiche en français et en anglais par PalateKit.

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