langchain4j-tool-function-calling-patterns
Provides tool and function calling patterns with LangChain4j. Handles defining tools, function calls, and LLM agent integration. Use when building agentic applications that interact with tools.
npx skills add majiayu000/claude-skill-registry --skill langchain4j-tool-function-calling-patterns-giuseppe-trisciuogli- --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# LangChain4j Tool & Function Calling Patterns Define tools and enable AI agents to interact with external systems, APIs, and services using LangChain4j's annotation-based and programmatic tool system. ## Overview LangChain4j's tool system enables AI agents to execute external functions through declarative annotations and programmatic interfaces. Tools are defined using the `@Tool` annotation and automatically registered with AI services, allowing LLMs to perform actions beyond text generation such as database queries, API calls, and calculations. ## When to Use This Skill Use this skill when: - Building AI applications that need to interact with external APIs and services - Creating AI assistants that can perform actions beyond text generation - Implementing AI systems that need access to real-time data (weather, stocks, etc.) - Building multi-agent systems where agents can use specialized tools - Creating AI applications with database read/write capabilities - Implementing AI systems that need to integrate with existing business systems - Building context-aware AI applications where tool availability depends on user state - Developing production AI applications that require robus
- Overview
- When to Use This Skill
- Instructions
- 1. Define Tool Methods
- 2. Configure Parameter Descriptions
- 3. Register Tools with AI Service
- 4. Handle Tool Execution Errors
- 5. Monitor Tool Usage
- Setup and Configuration
- Basic Tool Registration
- Builder Configuration Options
- Core Patterns
- Basic Tool Definition
- Parameter Descriptions and Validation
What does the langchain4j-tool-function-calling-patterns skill do?
Provides tool and function calling patterns with LangChain4j. Handles defining tools, function calls, and LLM agent integration. Use when building agentic applications that interact with tools.
How do I install it?
Run `npx skills add majiayu000/claude-skill-registry --skill langchain4j-tool-function-calling-patterns-giuseppe-trisciuogli- --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From majiayu000/claude-skill-registry, a repository with 534 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.