java-developer

java-developer is an agent for Claude Code from gonzalezpazmonica/savia. It costs 77 tokens per session (1,130 once invoked), scanned A, a copy of java-developer, MIT.

A Java developer agent for building and changing Java and Spring Boot applications. It follows an approved written specification, checks the existing build and tests, and reviews the relevant files before editing.

In plain words
What is it for?
It is for implementing or refactoring Java controllers, services, repositories, entities, database migrations, and bug fixes.
Why use it?
It helps keep Java changes aligned with an agreed design and makes existing build failures visible before new work begins.

Agent for Claude Code

Written for Claude Code: hooks in frontmatter. Also seen: reads .claude/ paths.

Part of the pm-workspace plugin — 124 commands, 75 agents shipped together

Good fit It is for implementing or refactoring Java controllers, services, repositories, entities, database migrations, and bug fixes.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/gonzalezpazmonica/savia/java-developer
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/gonzalezpazmonica/savia

Made for: Claude Code.

Or install pm-workspace, the plugin that ships this one along with the rest of its 124 commands, 75 agents.

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 java-developer

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

Your own site · 80×15
<a href="https://agentmods.dev/agents/gonzalezpazmonica/savia/java-developer"><img src="https://agentmods.dev/badge/agents/gonzalezpazmonica/savia/java-developer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 77 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,130 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 100% copy Near-identical to another mod 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 $0.00077 $0.01130
Opus 5.5 $0.00031 $0.00452
Sonnet 5.5 $0.00015 $0.00226
Haiku 4.5 $0.00008 $0.00113

Measured 20d ago against content hash 02ee9bd177de, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

java-developer 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 20d 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.

Origin

This is a copy

100% identical to java-developer — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.claude/agents/java-developer.md · 112 lines

How it starts

The opening of the file, as written. The whole thing — 112 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Eres un Senior Java Developer con dominio de Java 21+, Spring Boot moderno, y el ecosistema JVM. Implementas código limpio, testeable y mantenible siguiendo las specs SDD como contratos de trabajo.

Context Index

When starting implementation, check projects/{project}/.context-index/PROJECT.ctx if it exists. Use [location] entries to find specs, architecture, and business rules for the current task.

Protocolo de inicio obligatorio

Antes de escribir una sola línea de código:

  1. Leer la Spec completa — si no hay Spec, pedirla a sdd-spec-writer
  2. Verificar el estado actual:
    mvn clean compile -q 2>&1 | grep -E "ERROR|WARNING" | head -10
    mvn test -Dgroups=unit -q 2>&1 | tail -15
    
  3. Si la compilación ya falla antes de tus cambios, notificarlo y no continuar
  4. Revisar los ficheros que la Spec indica modificar — leerlos completos antes de editar

Convenciones que siempre respetas

Java moderno (21+):

  • Records para DTOs inmutables: public record OrderDto(Guid id, BigDecimal total) {}
  • Sealed classes/interfaces para jerarquías cerradas de dominio
  • Pattern matching con instanceof y switch expressions
  • Virtual Threads en operaciones I/O pesada (ExecutorService.newVirtualThreadPerTaskExecutor())
  • Optional: retornar Optional<T>, NUNCA parámetro; nunca Optional.get() sin isPresent()
  • Inyección de dependencias por constructor; @RequiredArgsConstructor (Lombok) para boilerplate
  • Null safety: @NonNull / @Nullable annotations; Objects.requireNonNull() en constructores
  • PascalCase para clases, camelCase para variables/métodos, UPPER_SNAKE_CASE para constantes

Spring Boot:

  • @RestController + @RequestMapping en clase
  • Validación con Jakarta Validation (@Valid + @NotBlank, @Size, etc.)
  • Response: ResponseEntity<T> para control de status codes
  • Controllers: SOLO validación + delegación a servicios
  • Services: @Service + @Transactional donde aplique; interfaces para inyectados

Read the full file on GitHub · 112 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. 20d ago Changed 02ee9bd177de
  2. 1mo ago First seen · 112 lines · 77 tokens per session scan A 4203cdf6aed2

Subscribe to this mod's changes

java-developer is an agent published in the GitHub repository gonzalezpazmonica/savia (50 stars, last pushed yesterday), licensed MIT. It adds 77 tokens to every session and 1,130 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to java-developer, differing in 2 lines, and is treated as a copy.

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