modernize-java

modernize-java is an agent for Claude Code from asleekgeek/claude-multiagent-catalogue. It costs 41 tokens per session (5,327 once invoked), scanned A, original, no licence file.

An upgrade assistant for Java projects, including projects using Spring Boot, a Java web framework. It plans and applies upgrades incrementally to newer target versions such as Java 21 or Spring Boot 3.2.

In plain words
What is it for?
Upgrading Java and Spring Boot versions in existing projects.
Why use it?
It helps manage the work of moving an existing Java project to newer platform versions in smaller, planned steps.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter.

Good fit Upgrading Java and Spring Boot versions in existing projects.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/asleekgeek/claude-multiagent-catalogue/modernize-java
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/asleekgeek/claude-multiagent-catalogue

Made for: Claude Code.

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 modernize-java

README.md
[![agentmods](https://agentmods.dev/badge/agents/asleekgeek/claude-multiagent-catalogue/modernize-java/github.svg)](https://agentmods.dev/agents/asleekgeek/claude-multiagent-catalogue/modernize-java)
Your own site
<a href="https://agentmods.dev/agents/asleekgeek/claude-multiagent-catalogue/modernize-java"><img src="https://agentmods.dev/badge/agents/asleekgeek/claude-multiagent-catalogue/modernize-java/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 modernize-java

Your own site · 80×15
<a href="https://agentmods.dev/agents/asleekgeek/claude-multiagent-catalogue/modernize-java"><img src="https://agentmods.dev/badge/agents/asleekgeek/claude-multiagent-catalogue/modernize-java.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 41 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 5,327 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 unknown 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 $0.00041 $0.05327
Opus 5 $0.00020 $0.02663
Sonnet 5 $0.00008 $0.01065
Haiku 4.5 $0.00004 $0.00533

Measured 7d ago against content hash 5a73b6d4f5d6, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

modernize-java 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 7d 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/modernize-java.md · 230 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 7d ago First seen · 230 lines · 41 tokens per session scan A 5a73b6d4f5d6

Subscribe to this mod's changes

modernize-java is an agent published in the GitHub repository asleekgeek/claude-multiagent-catalogue (2 stars, last pushed 3mo ago), with no licence file. It adds 41 tokens to every session and 5,327 once invoked, about $0.0002 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 2026-09-03.

Related

Other agents, from other repositories

java-refactor-expert

Expert Java and Spring Boot code refactoring specialist. Improves code quality, maintainability, and readability while preserving functionality. Applies clean code principles, SOLID patterns, and Spring Boot best practices. Use PROACTIVELY after implementing features or when code quality improvements are needed.

giuseppe-trisciuoglio/developer-kit · 61 tokens

java-documentation-specialist

Provides expert Java documentation capabilities, creating comprehensive technical documentation from Spring Boot codebases. Analyzes architecture, design patterns, and implementation details to produce complete project documentation including API docs, architecture guides, and technical manuals. Use proactively when…

giuseppe-trisciuoglio/developer-kit · 68 tokens

java-security-expert

Expert security auditor specializing in DevSecOps, comprehensive cybersecurity, and compliance frameworks. Masters vulnerability assessment, threat modeling, secure authentication (OAuth2/OIDC), OWASP standards, cloud security, and security automation. Handles DevSecOps integration, compliance (GDPR/HIPAA/SOC2), and…

giuseppe-trisciuoglio/developer-kit · 85 tokens

rust-developer

Use this agent when the user explicitly requests help with Rust development tasks. This includes building Rust projects, creating libraries or binaries, implementing async patterns with Tokio, working with ownership/borrowing, running cargo commands, or reviewing Rust code. Context: User is starting a new Rust project…

hmohamed01/claude-code-plugins · 376 tokens

java-software-architect-review

Provides expert Java software architecture review capability, specializing in Clean Architecture, Domain-Driven Design (DDD), and Spring Boot patterns. Reviews Java codebases for architectural integrity, proper bounded contexts, and SOLID principles. Use proactively when making Java architectural decisions, DDD…

giuseppe-trisciuoglio/developer-kit · 66 tokens

java-tutorial-engineer

Expert Java tutorial engineer specializing in Spring Boot and LangChain4j educational content. Creates step-by-step tutorials and hands-on learning experiences for Java developers, from basic Spring Boot concepts to advanced AI-powered applications with LangChain4j. Use PROACTIVELY for onboarding guides, feature…

giuseppe-trisciuoglio/developer-kit · 71 tokens