java-expert

java-expert is a skill for Claude Code from tourze/ai-infra. It costs 19 tokens per session (3,392 once invoked), scanned B, original, no licence file.

A Java development specialist covering Spring Boot, REST APIs, JPA, and microservices.

In plain words
What is it for?
It is for creating web APIs, connecting Java applications to databases, and designing services that communicate with one another.
Why use it?
It helps with building and maintaining Java server applications without needing to work out common framework patterns from scratch.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter. Also seen: model in frontmatter.

Good fit It is for creating web APIs, connecting Java applications to databases, and designing services that communicate with one another.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/tourze/ai-infra/java-expert
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 tourze/ai-infra --skill java-expert
Clone the repo
git clone --depth 1 https://github.com/tourze/ai-infra

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 java-expert

README.md
[![agentmods](https://agentmods.dev/badge/skills/tourze/ai-infra/java-expert/github.svg)](https://agentmods.dev/skills/tourze/ai-infra/java-expert)
Your own site
<a href="https://agentmods.dev/skills/tourze/ai-infra/java-expert"><img src="https://agentmods.dev/badge/skills/tourze/ai-infra/java-expert/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-expert

Your own site · 80×15
<a href="https://agentmods.dev/skills/tourze/ai-infra/java-expert"><img src="https://agentmods.dev/badge/skills/tourze/ai-infra/java-expert.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 19 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,392 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. 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 $0.00019 $0.03392
Opus 5 $0.00010 $0.01696
Sonnet 5 $0.00004 $0.00678
Haiku 4.5 $0.00002 $0.00339

Measured 9d ago against content hash 3f805f4c1efb, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade B, and why

java-expert scanned grade B with 1 finding 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.

The scan reads SKILL.md. This mod also ships 3 executable files (hooks/post-execute.cjs, hooks/pre-execute.cjs, scripts/main.cjs), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

cat .claude/context/memory/learnings.md
skills/java-expert/SKILL.md · 511 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

Files

What ships with it

9 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. 9d ago First seen · 511 lines · 19 tokens per session scan B 3f805f4c1efb

Subscribe to this mod's changes

java-expert is a skill published in the GitHub repository tourze/ai-infra (5 stars, last pushed 5mo ago), with no licence file. It adds 19 tokens to every session and 3,392 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

Related

Other skills, from other repositories

wxjava-api-contributor

A contributor guide for adding or maintaining official WeChat API support in WxJava, a Java software development kit. It covers services, request and response data objects, data conversion, HTTP handling, starter configuration, and regression tests.

binarywang/WxJava · 68 tokens

wxjava-module-selector

A decision guide for choosing the correct WxJava Maven module, dependency management file, and example for a WeChat use case. WxJava is a Java software development kit for services such as official accounts, mini programs, and payments.

binarywang/WxJava · 86 tokens

azure-communication-callautomation-java

Build call automation workflows with Azure Communication Services Call Automation Java SDK. Use when implementing IVR systems, call routing, call recording, DTMF recognition, text-to-speech, or AI-powered call flows.

microsoft/skills · 49 tokens

azure-communication-chat-java

Build real-time chat applications with Azure Communication Services Chat Java SDK. Use when implementing chat threads, messaging, participants, read receipts, typing notifications, or real-time chat features.

microsoft/skills · 41 tokens

azure-communication-common-java

Azure Communication Services common utilities for Java. Use when working with CommunicationTokenCredential, user identifiers, token refresh, or shared authentication across ACS services.

microsoft/skills · 35 tokens

azure-communication-sms-java

Send SMS messages with Azure Communication Services SMS Java SDK. Use when implementing SMS notifications, alerts, OTP delivery, bulk messaging, or delivery reports.

microsoft/skills · 36 tokens