quarkus-workshop-langchain4j: Instructions file for Codex

AGENTS.md

quarkus-workshop-langchain4j AGENTS.md is an instructions file for Codex, OpenCode from quarkusio/quarkus-workshop-langchain4j. It costs 1,995 tokens per session, scanned A, original, Apache-2.0.

Project instructions for a hands-on workshop that teaches Java developers to build AI-enabled applications with Quarkus and LangChain4j. The examples include chatbots, document-based answers, remote tools, workflows, and trip planning.

In plain words
What is it for?
Use it when modifying examples, exercises, configuration, or documentation in the Quarkus and LangChain4j workshop.
Why use it?
It gives a coding agent the project’s purpose, technology choices, structure, and build instructions before it changes workshop code.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions AGENTS.md.

This is quarkusio/quarkus-workshop-langchain4j's own configuration. It tells Codex and OpenCode how to work on quarkus-workshop-langchain4j itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything quarkus-workshop-langchain4j configures →

Reuse

Borrowing it

Nothing to install: this file belongs to quarkusio/quarkus-workshop-langchain4j. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/quarkusio/quarkus-workshop-langchain4j/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/quarkusio/quarkus-workshop-langchain4j

Made for: Codex, OpenCode.

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Per session 1,995 This file is loaded in full into every session.
When invoked 1,995 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.01995 $0.01995
Opus 5 $0.00997 $0.00997
Sonnet 5 $0.00399 $0.00399
Haiku 4.5 $0.00199 $0.00199

Measured 9d ago against content hash 59b2247c7866, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

quarkus-workshop-langchain4j AGENTS.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

AGENTS.md · 114 lines

How it starts

The opening of the file, as written. The whole thing — 114 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

This file provides guidance to agents when working with code in this repository.

Project Overview

This repository contains a comprehensive, hands-on workshop for building AI-infused applications and agentic systems using Quarkus and LangChain4j. The workshop teaches developers how to integrate Large Language Models into Quarkus applications, build intelligent chatbots with structured outputs and guardrails, implement Retrieval-Augmented Generation (RAG) patterns, use remote tools via Model Context Protocol (MCP), design agentic systems with workflow and supervisor patterns, and build enterprise-grade trip planning systems with advanced orchestration patterns.

The workshop follows the Miles of Smiles car rental company across three sections that together tell a complete customer journey: Section 1 builds a customer-facing support chatbot (before the trip), Section 2 handles fleet operations behind the scenes (after the trip), and Section 3 delivers an intelligent trip planning experience (planning the trip).

Technology Stack

The workshop uses Java 21 with the latest stable Quarkus release and the corresponding LangChain4j Quarkiverse extension. Versions are kept current and should not be hardcoded in documentation or agent instructions — check the individual step pom.xml files for the actual versions in use. Maven handles the build process, while the documentation is built with MkDocs using Python and Pipenv. The UI components leverage Vaadin Web Components and wc-chatbot for the chat interface.

Project Structure

This is a multi-module Maven project organized into three sections. The first section contains 11 steps focused on AI-infused applications, covering topics from basic LLM integration and AI Services through prompt engineering, structured outputs, guardrails, RAG patterns, MCP integration, and observability. These steps are located in section-1/step-XX/ directories, with the final state available in section-1/step-11/.

The second section contains 9 steps dedicated to agentic systems, exploring agentic workflows, multi-agent collaboration, supervisor patterns, and Agent-to-Agent (A2A) communication. Steps 01–07 are located in section-2/step-XX/ directories. Step 09 is a bonus Kubernetes/OpenShift deployment step (section-2/step-09/) that uses a JBang script rather than a Maven module — it deploys the Section 2 multi-agent system and remote A2A agent to a cluster with a single command.

Read the full file on GitHub · 114 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 9d ago First seen · 114 lines · 1,995 tokens per session scan A 59b2247c7866

Subscribe to this mod's changes

quarkus-workshop-langchain4j AGENTS.md is an instructions file published in the GitHub repository quarkusio/quarkus-workshop-langchain4j (97 stars, last pushed yesterday), licensed Apache-2.0. It adds 1,995 tokens to every session, about $0.0100 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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