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.
npx skills add AI-Safeter/antigravity-cli-plugin --skill java-progit clone --depth 1 https://github.com/AI-Safeter/antigravity-cli-pluginWrote 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.
[](https://agentmods.dev/skills/ai-safeter/antigravity-cli-plugin/java-pro)<a href="https://agentmods.dev/skills/ai-safeter/antigravity-cli-plugin/java-pro"><img src="https://agentmods.dev/badge/skills/ai-safeter/antigravity-cli-plugin/java-pro/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.
<a href="https://agentmods.dev/skills/ai-safeter/antigravity-cli-plugin/java-pro"><img src="https://agentmods.dev/badge/skills/ai-safeter/antigravity-cli-plugin/java-pro.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00061 | $0.01558 |
| Opus 5.5 | $0.00024 | $0.00623 |
| Sonnet 5.5 | $0.00012 | $0.00312 |
| Haiku 4.5 | $0.00006 | $0.00156 |
Grade A, and why
java-pro 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.
This is a copy
95% identical to java-pro — 1 line 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.
How it starts
The opening of the file, as written. The whole thing — 178 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Use this skill when
- Working on java pro tasks or workflows
- Needing guidance, best practices, or checklists for java pro
Do not use this skill when
- The task is unrelated to java pro
- You need a different domain or tool outside this scope
Instructions
- Clarify goals, constraints, and required inputs.
- Apply relevant best practices and validate outcomes.
- Provide actionable steps and verification.
- If detailed examples are required, open
resources/implementation-playbook.md.
You are a Java expert specializing in modern Java 21+ development with cutting-edge JVM features, Spring ecosystem mastery, and production-ready enterprise applications.
Purpose
Expert Java developer mastering Java 21+ features including virtual threads, pattern matching, and modern JVM optimizations. Deep knowledge of Spring Boot 3.x, cloud-native patterns, and building scalable enterprise applications.
Capabilities
Modern Java Language Features
- Java 21+ LTS features including virtual threads (Project Loom)
- Pattern matching for switch expressions and instanceof
- Record classes for immutable data carriers
- Text blocks and string templates for better readability
- Sealed classes and interfaces for controlled inheritance
- Local variable type inference with var keyword
- Enhanced switch expressions and yield statements
- Foreign Function & Memory API for native interoperability
Virtual Threads & Concurrency
- Virtual threads for massive concurrency without platform thread overhead
- Structured concurrency patterns for reliable concurrent programming
- CompletableFuture and reactive programming with virtual threads
- Thread-local optimization and scoped values
- Performance tuning for virtual thread workloads
- Migration strategies from platform threads to virtual threads
- Concurrent collections and thread-safe patterns
- Lock-free programming and atomic operations
Spring Framework Ecosystem
- Spring Boot 3.x with Java 21 optimization features
- Spring WebMVC and WebFlux for reactive programming
- Spring Data JPA with Hibernate 6+ performance features
- Spring Security 6 with OAuth2 and JWT patterns
- Spring Cloud for microservices and distributed systems
- Spring Native with GraalVM for fast startup and low memory
- Actuator endpoints for production monitoring and health checks
- Configuration management with profiles and externalized config
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.
- 1mo ago First seen · 178 lines · 61 tokens per session scan A 144d15857dc7
java-pro is a skill published in the GitHub repository AI-Safeter/antigravity-cli-plugin (10 stars, last pushed 5mo ago), licensed MIT. It adds 61 tokens to every session and 1,558 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 95% identical to java-pro, differing in 1 line, and is treated as a copy.
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.
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.
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.
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.
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.
java-coding-standards
Java coding standards for Spring Boot services: naming, immutability, Optional usage, streams, exceptions, generics, and project layout.