ai-agent

Quarkus Langchain4j for AI

Name: Quarkus Langchain4j for AI
Author: quarkiverse

Get AI capabilities with Quarkus Langchain4j, a tool for startup founders using Java.

314 stars236 forksJavaGuide quality 8/10Updated 8/25/2026100% free · open source

What it does

Quarkus Langchain4j brings AI capabilities to Quarkus applications, allowing Java developers to integrate language models into their projects

When to use it

•Building conversational interfaces with Java
•Integrating language models into existing Quarkus applications
•Developing AI-powered services with a Java-based backend

Ready-to-paste prompt

Use the following code to generate text using the LLaMA model: `langchain4jClient.generateText("Write a short story about a character who discovers a hidden world")`

Heads up: Make sure you have a compatible Java version (Java 11 or later) and a Quarkus version that supports the Langchain4j extension (Quarkus 2.13.0 or later)

Saves to your device

Use with Claude

New

Skip the builder — one click puts this in Claude, Cursor, Antigravity and more.

🛠️ Technical setup

Expect 20–40 minutes in a terminal — or let your AI agent drive it.

Try it instantly — no install

Claude Code

mkdir -p ~/.claude/skills/quarkus-langchain4j && curl -fsSL https://workflowstacks.com/api/skills/quarkus-langchain4j/claude-skill -o ~/.claude/skills/quarkus-langchain4j/SKILL.md

Open in another AI app

Opens the app with this repo with the prompt ready to go — no copy-paste needed.

Connect the whole catalog (MCP)

claude mcp add --transport http workflowstacks https://workflowstacks.com/api/mcp

Adds a WorkflowStacks connector to Claude Code: search and load any skill here by chatting.

How Quarkus Langchain4j for AI works

Codeflow

Free to inspect

Quarkus Langchain4j for AI is a very large Java project (~111k lines across 1331 code files, plus 850 test files). It is a full software project: use it through its install path rather than reading it end to end. Last commit this month, Apache-2.0 license, has a test suite.

Size

Very large codebase

~111k lines · 1331 code files · days to read — use, don't read

Setup

Developer setup

A real software project. Use it via its install path; don't expect to read it all.

Runs on

Java/JVM

No API keys detected

Java 95%HTML 3%JavaScript 1%

Where to start reading

1
README.md
Start here — what it does and how to install it
2
package.json
Dependencies and the commands it exposes
3
core/deployment/src/main/resources/dev-ui/qwc-aiservices.js
Inside core/ — the main logic begins here
4
samples/a2a-agent-discovery/README.md
A worked example — copy this to get going

What's in each folder

core/Core code — the actual logic512 files

skills/Prompts, skills & agent definitions22 files

samples/Examples you can copy464 files

docs/Documentation285 files

model-providers/Folder778 files

integration-tests/Folder277 files

embedding-stores/Folder225 files

agentic/Folder97 files

READMEHas testsDocumentedCI checksExamples includedApache-2.0 licenseUpdated this month

Use with Claude

New

Skip the builder — one click puts this in Claude, Cursor, Antigravity and more.

🛠️ Technical setup

Expect 20–40 minutes in a terminal — or let your AI agent drive it.

Try it instantly — no install

Claude Code

mkdir -p ~/.claude/skills/quarkus-langchain4j && curl -fsSL https://workflowstacks.com/api/skills/quarkus-langchain4j/claude-skill -o ~/.claude/skills/quarkus-langchain4j/SKILL.md

Open in another AI app

Opens the app with this repo with the prompt ready to go — no copy-paste needed.

Connect the whole catalog (MCP)

claude mcp add --transport http workflowstacks https://workflowstacks.com/api/mcp

Adds a WorkflowStacks connector to Claude Code: search and load any skill here by chatting.

Quick Actions

Details

Creator

quarkiverse

Language

Java