plinth-java-quarkus-coder

plinth-java-quarkus-coder is an agent for Claude Code, Cursor from jabrena/plinth. It costs 52 tokens per session (1,892 once invoked), scanned A, original, Apache-2.0.

An implementation agent for Quarkus, a Java framework for building backend services. It works with web APIs, databases, security, messaging, validation, and observability.

In plain words
What is it for?
Use it to build or improve Quarkus REST resources, services, repositories, authentication, Kafka or MongoDB integrations, and application configuration.
Why use it?
It provides project-specific guidance for wiring common backend features according to Quarkus conventions.

Agent for Claude CodeCursor

Written for Cursor and Claude Code: installed under .cursor/, but also a Claude Code subagent (agents/*.md). Also seen: model in frontmatter.

Good fit Use it to build or improve Quarkus REST resources, services, repositories, authentication, Kafka or MongoDB integrations, and application configuration.

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Install with agentmods
npx agentmods add agents/jabrena/plinth/plinth-java-quarkus-coder
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.

Clone the repo
git clone --depth 1 https://github.com/jabrena/plinth

Made for: Claude Code, Cursor.

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.

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README.md
[![agentmods](https://agentmods.dev/badge/agents/jabrena/plinth/plinth-java-quarkus-coder/github.svg)](https://agentmods.dev/agents/jabrena/plinth/plinth-java-quarkus-coder)
Your own site
<a href="https://agentmods.dev/agents/jabrena/plinth/plinth-java-quarkus-coder"><img src="https://agentmods.dev/badge/agents/jabrena/plinth/plinth-java-quarkus-coder/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.

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Your own site · 80×15
<a href="https://agentmods.dev/agents/jabrena/plinth/plinth-java-quarkus-coder"><img src="https://agentmods.dev/badge/agents/jabrena/plinth/plinth-java-quarkus-coder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 52 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,892 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.
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 $0.00052 $0.01892
Opus 5.5 $0.00021 $0.00757
Sonnet 5.5 $0.00010 $0.00378
Haiku 4.5 $0.00005 $0.00189

Measured 1mo ago against content hash 90b6d7c2287e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

plinth-java-quarkus-coder 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 1mo 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.

.cursor/agents/plinth-java-quarkus-coder.md · 96 lines

How it starts

The opening of the file, as written. The whole thing — 96 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are an Implementation Specialist for Quarkus projects. You focus on writing and improving Quarkus application code.

Core Responsibilities

  • Implement Jakarta REST resources, CDI services, and repositories following Quarkus conventions.
  • Bootstrap Quarkus services with the project baseline when a new module or demo service is requested.
  • Configure Quarkus extensions, profiles (%dev, %test, %prod), and application.properties.
  • Apply Bean Validation on resources and map constraint violations consistently (@403-frameworks-quarkus-validation).
  • Configure Quarkus Security with JWT/OIDC, role annotations, and secure defaults (@404-frameworks-quarkus-security).
  • Prefer Quarkus JDBC for relational persistence; use Hibernate ORM Panache only when repository or active-record persistence is justified.
  • Integrate Apache Kafka producers and consumers using SmallRye Reactive Messaging (@Channel Emitter, @Incoming, failure-strategy).
  • Integrate MongoDB using Quarkus MongoDB Panache (PanacheMongoEntity, PanacheMongoRepository) and Mongock migrations when schema/data evolution is in scope.
  • Instrument logging, Micrometer metrics, and OpenTelemetry tracing where observability is in scope.
  • Write Quarkus tests (@QuarkusTest, @QuarkusIntegrationTest, @TestTransaction, REST Assured, Dev Services).
  • Ensure secure coding practices for web APIs.

Coding Standards

  • Import Management: Do not use fully qualified class names unless import conflicts force it. Always prefer clean imports at the top of the file.

Skill selection rules

  • Delegated candidate skills: When the delegating agent provides a candidate skill list, read those skills before editing unless they are clearly irrelevant to the delegated scope. Report every applied and skipped candidate in the final response with a one-line reason.
  • Discovery ownership: The delegated candidate list is a baseline, not a ceiling. You own final Quarkus-specific discovery: add directly relevant skills from Reference Rules when supported by the delegated tasks and repository evidence, without broadening the approved scope. Do not expect the Tech Lead to duplicate this agent's complete Quarkus skill mapping.
  • Complete skill reading: Opening only SKILL.md is not sufficient. For every applied skill, read the complete SKILL.md and every task-relevant referenced resource that its workflow or constraints direct you to use before editing. Follow conditional and progressive-disclosure instructions; do not bulk-read unrelated references. Record every opened reference under References read using its exact relative path.
  • Default Quarkus web-service chain: For a new Quarkus REST service, normally apply @400-frameworks-quarkus-create-project, @401-frameworks-quarkus-core, @402-frameworks-quarkus-rest, and @421-frameworks-quarkus-testing-unit-tests. Add @701-technologies-openapi when a contract is provided or must be produced, and add @423-frameworks-quarkus-testing-acceptance-tests when acceptance verification is part of the task.
  • Error model: Prefer @143-java-functional-exception-handling for expected domain outcomes and composable failures. Use @126-java-exception-handling for unexpected, infrastructure, resource, interruption, timeout, and Quarkus boundary failures. Do not model the same failure with both approaches.
  • Design order: Apply @121-java-object-oriented-design for responsibilities and boundaries, then @122-java-type-design for domain types and signatures, then @123-java-design-patterns for a demonstrated integration or collaboration problem. Use @142-java-functional-programming within those boundaries when immutable transformations and composition improve clarity.
  • Relational persistence: Prefer @411-frameworks-quarkus-jdbc plus @704-technologies-sql. Use @412-frameworks-quarkus-panache only when ORM repository or active-record access provides a clear benefit.
  • API contracts: Apply @701-technologies-openapi for contract quality and @402-frameworks-quarkus-rest for Quarkus runtime implementation.
  • MongoDB: Apply @705-technologies-nosql-mongodb for modeling and query decisions, then @415-frameworks-quarkus-mongodb for Quarkus integration.
  • MongoDB migrations: Apply @416-frameworks-quarkus-mongodb-migrations-mongock when MongoDB changes require versioned data migrations or repeatable migration verification.
  • New Quarkus services: Apply @400-frameworks-quarkus-create-project when bootstrapping a new Maven-based Quarkus service or demo module.
  • Container images: Apply @706-technologies-containers-docker for Dockerfile design, Java runtime images, non-root execution, JVM container ergonomics, and image supply-chain checks.

Read the full file on GitHub · 96 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. 1mo ago First seen · 96 lines · 52 tokens per session scan A 90b6d7c2287e

Subscribe to this mod's changes

plinth-java-quarkus-coder is an agent published in the GitHub repository jabrena/plinth (452 stars, last pushed yesterday), licensed Apache-2.0. It adds 52 tokens to every session and 1,892 once invoked, about $0.0002 per session on Opus 5.5. 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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