quarkus-backend

quarkus-backend is a skill for Claude Code, Codex from j4flmao/agent-skills. It costs 75 tokens per session (4,380 once invoked), scanned A, original, MIT.

A guide for building Java backend services with Quarkus, a framework designed for fast development and container or native deployment. It covers HTTP endpoints, databases, messaging, testing, and development tools.

In plain words
What is it for?
Use it to set up RESTEasy Reactive endpoints, Panache database access, reactive messaging, Dev Services, Dev UI, native builds, and tests with @QuarkusTest.
Why use it?
It gives a consistent structure for creating and configuring Quarkus services. Live reload, continuous testing, and native compilation support help with development and deployment tasks.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions Codex.

Good fit Use it to set up RESTEasy Reactive endpoints, Panache database access, reactive messaging, Dev Services, Dev UI, native builds, and tests with @QuarkusTest.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/j4flmao/agent-skills/quarkus
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add j4flmao/agent-skills --skill quarkus
Clone the repo
git clone --depth 1 https://github.com/j4flmao/agent-skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for quarkus-backend

README.md
[![agentmods](https://agentmods.dev/badge/skills/j4flmao/agent-skills/quarkus/github.svg)](https://agentmods.dev/skills/j4flmao/agent-skills/quarkus)
Your own site
<a href="https://agentmods.dev/skills/j4flmao/agent-skills/quarkus"><img src="https://agentmods.dev/badge/skills/j4flmao/agent-skills/quarkus/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for quarkus-backend

Your own site · 80×15
<a href="https://agentmods.dev/skills/j4flmao/agent-skills/quarkus"><img src="https://agentmods.dev/badge/skills/j4flmao/agent-skills/quarkus.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 75 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,380 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00075 $0.04380
Opus 5 $0.00037 $0.02190
Sonnet 5 $0.00015 $0.00876
Haiku 4.5 $0.00007 $0.00438

Measured 10d ago against content hash e7ba12ce8ac2, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

quarkus-backend 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 10d 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.

skills/backend/java/quarkus/SKILL.md · 564 lines

How it starts

The opening of the file, as written. The whole thing — 564 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Quarkus Backend

Purpose

Define Quarkus backend application architecture: supersonic startup, live reload, native executables, reactive messaging, and extension ecosystem.

Agent Protocol

Trigger

User request includes: quarkus, quarkus backend, supersonic java, quarkus native, panache, quarkus reactive, quarkus extension, quarkus dev ui, container-first java.

Input Context

  • JDK version (17+)
  • Build tool (Gradle, Maven)
  • Runtime (JIT, GraalVM native)
  • Extensions (RESTEasy Reactive, Hibernate, Kafka, MongoDB)
  • Deployment (JAR, native binary, container)

Output Artifact

A markdown document containing:

  • Project structure
  • RESTEasy Reactive endpoint conventions
  • Panache ORM setup
  • Reactive messaging configuration
  • Dev Services and Dev UI usage
  • Native compilation config
  • Testing with @QuarkusTest
  • Extension configuration

Response Format

Produce the artifact directly. No preamble, no postamble, no explanations. No filler, no hedging. Compress output.

Completion Criteria

  • Application starts in dev mode with live reload
  • REST endpoints use RESTEasy Reactive annotations
  • Panache repository or active record configured
  • Native build succeeds with application.properties tuning
  • Tests pass with @QuarkusTest and Dev Services

Max Response Length

4096 tokens

Workflow

Step 1: Project Initialization

# Using Maven
mvn io.quarkus.platform:quarkus-maven-plugin:3.6.0:create \
  -DprojectGroupId=com.example \
  -DprojectArtifactId=order-service \
  -Dextensions='resteasy-reactive,hibernate-validator,reactive-pg-client,panache'

# Using Gradle
quarkus create app com.example:order-service \
  --extension=resteasy-reactive,reactive-pg-client,panache,kafka

# Using Quarkus CLI
quarkus create app order-service \
  -x resteasy-reactive,reactive-pg-client,panache,kafka

Step 2: Project Structure

src/
+-- main/
|   +-- java/com/example/
|   |   +-- OrderResource.java
|   |   +-- OrderService.java
|   |   +-- Order.java
|   |   +-- OrderRepository.java
|   |   +-- OrderMapper.java
|   |   +-- dto/
|   |   |   +-- CreateOrderRequest.java
|   |   |   +-- OrderResponse.java
|   |   +-- messaging/
|   |   |   +-- OrderEventProducer.java
|   |   |   +-- OrderEventConsumer.java
|   |   +-- exception/
|   |   |   +-- GlobalExceptionMapper.java
|   |   |   +-- OrderNotFoundException.java
|   |   +-- health/
|   |       +-- DatabaseHealthCheck.java
|   +-- resources/
|       +-- application.properties
|       +-- META-INF/
|           +-- resources-config.json  (GraalVM hints)
+-- test/
|   +-- java/com/example/
|       +-- OrderResourceTest.java
|       +-- OrderServiceTest.java
+-- docker-compose.yml

Read the full file on GitHub · 564 lines

Files

What ships with it

6 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 10d ago First seen · 564 lines · 75 tokens per session scan A e7ba12ce8ac2

Subscribe to this mod's changes

quarkus-backend is a skill published in the GitHub repository j4flmao/agent-skills (22 stars, last pushed 3d ago), licensed MIT. It adds 75 tokens to every session and 4,380 once invoked, about $0.0004 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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